1 /* Expand builtin functions.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
3 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to the Free
19 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
24 #include "coretypes.h"
30 #include "tree-gimple.h"
33 #include "hard-reg-set.h"
36 #include "insn-config.h"
42 #include "typeclass.h"
47 #include "langhooks.h"
48 #include "basic-block.h"
49 #include "tree-mudflap.h"
51 #ifndef PAD_VARARGS_DOWN
52 #define PAD_VARARGS_DOWN BYTES_BIG_ENDIAN
55 /* Define the names of the builtin function types and codes. */
56 const char *const built_in_class_names
[4]
57 = {"NOT_BUILT_IN", "BUILT_IN_FRONTEND", "BUILT_IN_MD", "BUILT_IN_NORMAL"};
59 #define DEF_BUILTIN(X, N, C, T, LT, B, F, NA, AT, IM, COND) #X,
60 const char * built_in_names
[(int) END_BUILTINS
] =
62 #include "builtins.def"
66 /* Setup an array of _DECL trees, make sure each element is
67 initialized to NULL_TREE. */
68 tree built_in_decls
[(int) END_BUILTINS
];
69 /* Declarations used when constructing the builtin implicitly in the compiler.
70 It may be NULL_TREE when this is invalid (for instance runtime is not
71 required to implement the function call in all cases). */
72 tree implicit_built_in_decls
[(int) END_BUILTINS
];
74 static int get_pointer_alignment (tree
, unsigned int);
75 static const char *c_getstr (tree
);
76 static rtx
c_readstr (const char *, enum machine_mode
);
77 static int target_char_cast (tree
, char *);
78 static rtx
get_memory_rtx (tree
, tree
);
79 static tree
build_string_literal (int, const char *);
80 static int apply_args_size (void);
81 static int apply_result_size (void);
82 #if defined (HAVE_untyped_call) || defined (HAVE_untyped_return)
83 static rtx
result_vector (int, rtx
);
85 static rtx
expand_builtin_setjmp (tree
, rtx
);
86 static void expand_builtin_update_setjmp_buf (rtx
);
87 static void expand_builtin_prefetch (tree
);
88 static rtx
expand_builtin_apply_args (void);
89 static rtx
expand_builtin_apply_args_1 (void);
90 static rtx
expand_builtin_apply (rtx
, rtx
, rtx
);
91 static void expand_builtin_return (rtx
);
92 static enum type_class
type_to_class (tree
);
93 static rtx
expand_builtin_classify_type (tree
);
94 static void expand_errno_check (tree
, rtx
);
95 static rtx
expand_builtin_mathfn (tree
, rtx
, rtx
);
96 static rtx
expand_builtin_mathfn_2 (tree
, rtx
, rtx
);
97 static rtx
expand_builtin_mathfn_3 (tree
, rtx
, rtx
);
98 static rtx
expand_builtin_int_roundingfn (tree
, rtx
, rtx
);
99 static rtx
expand_builtin_args_info (tree
);
100 static rtx
expand_builtin_next_arg (void);
101 static rtx
expand_builtin_va_start (tree
);
102 static rtx
expand_builtin_va_end (tree
);
103 static rtx
expand_builtin_va_copy (tree
);
104 static rtx
expand_builtin_memcmp (tree
, tree
, rtx
, enum machine_mode
);
105 static rtx
expand_builtin_strcmp (tree
, rtx
, enum machine_mode
);
106 static rtx
expand_builtin_strncmp (tree
, rtx
, enum machine_mode
);
107 static rtx
builtin_memcpy_read_str (void *, HOST_WIDE_INT
, enum machine_mode
);
108 static rtx
expand_builtin_strcat (tree
, tree
, rtx
, enum machine_mode
);
109 static rtx
expand_builtin_strncat (tree
, rtx
, enum machine_mode
);
110 static rtx
expand_builtin_strspn (tree
, rtx
, enum machine_mode
);
111 static rtx
expand_builtin_strcspn (tree
, rtx
, enum machine_mode
);
112 static rtx
expand_builtin_memcpy (tree
, rtx
, enum machine_mode
);
113 static rtx
expand_builtin_mempcpy (tree
, tree
, rtx
, enum machine_mode
, int);
114 static rtx
expand_builtin_memmove (tree
, tree
, rtx
, enum machine_mode
, tree
);
115 static rtx
expand_builtin_bcopy (tree
);
116 static rtx
expand_builtin_strcpy (tree
, tree
, rtx
, enum machine_mode
);
117 static rtx
expand_builtin_stpcpy (tree
, rtx
, enum machine_mode
);
118 static rtx
builtin_strncpy_read_str (void *, HOST_WIDE_INT
, enum machine_mode
);
119 static rtx
expand_builtin_strncpy (tree
, rtx
, enum machine_mode
);
120 static rtx
builtin_memset_read_str (void *, HOST_WIDE_INT
, enum machine_mode
);
121 static rtx
builtin_memset_gen_str (void *, HOST_WIDE_INT
, enum machine_mode
);
122 static rtx
expand_builtin_memset (tree
, rtx
, enum machine_mode
, tree
);
123 static rtx
expand_builtin_bzero (tree
);
124 static rtx
expand_builtin_strlen (tree
, rtx
, enum machine_mode
);
125 static rtx
expand_builtin_strstr (tree
, tree
, rtx
, enum machine_mode
);
126 static rtx
expand_builtin_strpbrk (tree
, tree
, rtx
, enum machine_mode
);
127 static rtx
expand_builtin_strchr (tree
, tree
, rtx
, enum machine_mode
);
128 static rtx
expand_builtin_strrchr (tree
, tree
, rtx
, enum machine_mode
);
129 static rtx
expand_builtin_alloca (tree
, rtx
);
130 static rtx
expand_builtin_unop (enum machine_mode
, tree
, rtx
, rtx
, optab
);
131 static rtx
expand_builtin_frame_address (tree
, tree
);
132 static rtx
expand_builtin_fputs (tree
, rtx
, bool);
133 static rtx
expand_builtin_printf (tree
, rtx
, enum machine_mode
, bool);
134 static rtx
expand_builtin_fprintf (tree
, rtx
, enum machine_mode
, bool);
135 static rtx
expand_builtin_sprintf (tree
, rtx
, enum machine_mode
);
136 static tree
stabilize_va_list (tree
, int);
137 static rtx
expand_builtin_expect (tree
, rtx
);
138 static tree
fold_builtin_constant_p (tree
);
139 static tree
fold_builtin_classify_type (tree
);
140 static tree
fold_builtin_strlen (tree
);
141 static tree
fold_builtin_inf (tree
, int);
142 static tree
fold_builtin_nan (tree
, tree
, int);
143 static int validate_arglist (tree
, ...);
144 static bool integer_valued_real_p (tree
);
145 static tree
fold_trunc_transparent_mathfn (tree
, tree
);
146 static bool readonly_data_expr (tree
);
147 static rtx
expand_builtin_fabs (tree
, rtx
, rtx
);
148 static rtx
expand_builtin_signbit (tree
, rtx
);
149 static tree
fold_builtin_cabs (tree
, tree
);
150 static tree
fold_builtin_sqrt (tree
, tree
);
151 static tree
fold_builtin_cbrt (tree
, tree
);
152 static tree
fold_builtin_pow (tree
, tree
, tree
);
153 static tree
fold_builtin_powi (tree
, tree
, tree
);
154 static tree
fold_builtin_sin (tree
);
155 static tree
fold_builtin_cos (tree
, tree
, tree
);
156 static tree
fold_builtin_tan (tree
);
157 static tree
fold_builtin_atan (tree
, tree
);
158 static tree
fold_builtin_trunc (tree
, tree
);
159 static tree
fold_builtin_floor (tree
, tree
);
160 static tree
fold_builtin_ceil (tree
, tree
);
161 static tree
fold_builtin_round (tree
, tree
);
162 static tree
fold_builtin_int_roundingfn (tree
, tree
);
163 static tree
fold_builtin_bitop (tree
, tree
);
164 static tree
fold_builtin_memcpy (tree
, tree
);
165 static tree
fold_builtin_mempcpy (tree
, tree
, int);
166 static tree
fold_builtin_memmove (tree
, tree
);
167 static tree
fold_builtin_strchr (tree
, tree
);
168 static tree
fold_builtin_memcmp (tree
);
169 static tree
fold_builtin_strcmp (tree
);
170 static tree
fold_builtin_strncmp (tree
);
171 static tree
fold_builtin_signbit (tree
, tree
);
172 static tree
fold_builtin_copysign (tree
, tree
, tree
);
173 static tree
fold_builtin_isascii (tree
);
174 static tree
fold_builtin_toascii (tree
);
175 static tree
fold_builtin_isdigit (tree
);
176 static tree
fold_builtin_fabs (tree
, tree
);
177 static tree
fold_builtin_abs (tree
, tree
);
178 static tree
fold_builtin_unordered_cmp (tree
, tree
, enum tree_code
,
180 static tree
fold_builtin_1 (tree
, tree
, bool);
182 static tree
fold_builtin_strpbrk (tree
, tree
);
183 static tree
fold_builtin_strstr (tree
, tree
);
184 static tree
fold_builtin_strrchr (tree
, tree
);
185 static tree
fold_builtin_strcat (tree
);
186 static tree
fold_builtin_strncat (tree
);
187 static tree
fold_builtin_strspn (tree
);
188 static tree
fold_builtin_strcspn (tree
);
189 static tree
fold_builtin_sprintf (tree
, int);
191 static rtx
expand_builtin_object_size (tree
);
192 static rtx
expand_builtin_memory_chk (tree
, rtx
, enum machine_mode
,
193 enum built_in_function
);
194 static void maybe_emit_chk_warning (tree
, enum built_in_function
);
195 static void maybe_emit_sprintf_chk_warning (tree
, enum built_in_function
);
196 static tree
fold_builtin_object_size (tree
);
197 static tree
fold_builtin_strcat_chk (tree
, tree
);
198 static tree
fold_builtin_strncat_chk (tree
, tree
);
199 static tree
fold_builtin_sprintf_chk (tree
, enum built_in_function
);
200 static tree
fold_builtin_printf (tree
, tree
, bool, enum built_in_function
);
201 static tree
fold_builtin_fprintf (tree
, tree
, bool, enum built_in_function
);
203 /* Return true if NODE should be considered for inline expansion regardless
204 of the optimization level. This means whenever a function is invoked with
205 its "internal" name, which normally contains the prefix "__builtin". */
207 static bool called_as_built_in (tree node
)
209 const char *name
= IDENTIFIER_POINTER (DECL_NAME (node
));
210 if (strncmp (name
, "__builtin_", 10) == 0)
212 if (strncmp (name
, "__sync_", 7) == 0)
217 /* Return the alignment in bits of EXP, a pointer valued expression.
218 But don't return more than MAX_ALIGN no matter what.
219 The alignment returned is, by default, the alignment of the thing that
220 EXP points to. If it is not a POINTER_TYPE, 0 is returned.
222 Otherwise, look at the expression to see if we can do better, i.e., if the
223 expression is actually pointing at an object whose alignment is tighter. */
226 get_pointer_alignment (tree exp
, unsigned int max_align
)
228 unsigned int align
, inner
;
230 if (! POINTER_TYPE_P (TREE_TYPE (exp
)))
233 align
= TYPE_ALIGN (TREE_TYPE (TREE_TYPE (exp
)));
234 align
= MIN (align
, max_align
);
238 switch (TREE_CODE (exp
))
242 case NON_LVALUE_EXPR
:
243 exp
= TREE_OPERAND (exp
, 0);
244 if (! POINTER_TYPE_P (TREE_TYPE (exp
)))
247 inner
= TYPE_ALIGN (TREE_TYPE (TREE_TYPE (exp
)));
248 align
= MIN (inner
, max_align
);
252 /* If sum of pointer + int, restrict our maximum alignment to that
253 imposed by the integer. If not, we can't do any better than
255 if (! host_integerp (TREE_OPERAND (exp
, 1), 1))
258 while (((tree_low_cst (TREE_OPERAND (exp
, 1), 1))
259 & (max_align
/ BITS_PER_UNIT
- 1))
263 exp
= TREE_OPERAND (exp
, 0);
267 /* See what we are pointing at and look at its alignment. */
268 exp
= TREE_OPERAND (exp
, 0);
269 if (TREE_CODE (exp
) == FUNCTION_DECL
)
270 align
= FUNCTION_BOUNDARY
;
271 else if (DECL_P (exp
))
272 align
= DECL_ALIGN (exp
);
273 #ifdef CONSTANT_ALIGNMENT
274 else if (CONSTANT_CLASS_P (exp
))
275 align
= CONSTANT_ALIGNMENT (exp
, align
);
277 return MIN (align
, max_align
);
285 /* Compute the length of a C string. TREE_STRING_LENGTH is not the right
286 way, because it could contain a zero byte in the middle.
287 TREE_STRING_LENGTH is the size of the character array, not the string.
289 ONLY_VALUE should be nonzero if the result is not going to be emitted
290 into the instruction stream and zero if it is going to be expanded.
291 E.g. with i++ ? "foo" : "bar", if ONLY_VALUE is nonzero, constant 3
292 is returned, otherwise NULL, since
293 len = c_strlen (src, 1); if (len) expand_expr (len, ...); would not
294 evaluate the side-effects.
296 The value returned is of type `ssizetype'.
298 Unfortunately, string_constant can't access the values of const char
299 arrays with initializers, so neither can we do so here. */
302 c_strlen (tree src
, int only_value
)
305 HOST_WIDE_INT offset
;
310 if (TREE_CODE (src
) == COND_EXPR
311 && (only_value
|| !TREE_SIDE_EFFECTS (TREE_OPERAND (src
, 0))))
315 len1
= c_strlen (TREE_OPERAND (src
, 1), only_value
);
316 len2
= c_strlen (TREE_OPERAND (src
, 2), only_value
);
317 if (tree_int_cst_equal (len1
, len2
))
321 if (TREE_CODE (src
) == COMPOUND_EXPR
322 && (only_value
|| !TREE_SIDE_EFFECTS (TREE_OPERAND (src
, 0))))
323 return c_strlen (TREE_OPERAND (src
, 1), only_value
);
325 src
= string_constant (src
, &offset_node
);
329 max
= TREE_STRING_LENGTH (src
) - 1;
330 ptr
= TREE_STRING_POINTER (src
);
332 if (offset_node
&& TREE_CODE (offset_node
) != INTEGER_CST
)
334 /* If the string has an internal zero byte (e.g., "foo\0bar"), we can't
335 compute the offset to the following null if we don't know where to
336 start searching for it. */
339 for (i
= 0; i
< max
; i
++)
343 /* We don't know the starting offset, but we do know that the string
344 has no internal zero bytes. We can assume that the offset falls
345 within the bounds of the string; otherwise, the programmer deserves
346 what he gets. Subtract the offset from the length of the string,
347 and return that. This would perhaps not be valid if we were dealing
348 with named arrays in addition to literal string constants. */
350 return size_diffop (size_int (max
), offset_node
);
353 /* We have a known offset into the string. Start searching there for
354 a null character if we can represent it as a single HOST_WIDE_INT. */
355 if (offset_node
== 0)
357 else if (! host_integerp (offset_node
, 0))
360 offset
= tree_low_cst (offset_node
, 0);
362 /* If the offset is known to be out of bounds, warn, and call strlen at
364 if (offset
< 0 || offset
> max
)
366 warning (0, "offset outside bounds of constant string");
370 /* Use strlen to search for the first zero byte. Since any strings
371 constructed with build_string will have nulls appended, we win even
372 if we get handed something like (char[4])"abcd".
374 Since OFFSET is our starting index into the string, no further
375 calculation is needed. */
376 return ssize_int (strlen (ptr
+ offset
));
379 /* Return a char pointer for a C string if it is a string constant
380 or sum of string constant and integer constant. */
387 src
= string_constant (src
, &offset_node
);
391 if (offset_node
== 0)
392 return TREE_STRING_POINTER (src
);
393 else if (!host_integerp (offset_node
, 1)
394 || compare_tree_int (offset_node
, TREE_STRING_LENGTH (src
) - 1) > 0)
397 return TREE_STRING_POINTER (src
) + tree_low_cst (offset_node
, 1);
400 /* Return a CONST_INT or CONST_DOUBLE corresponding to target reading
401 GET_MODE_BITSIZE (MODE) bits from string constant STR. */
404 c_readstr (const char *str
, enum machine_mode mode
)
410 gcc_assert (GET_MODE_CLASS (mode
) == MODE_INT
);
415 for (i
= 0; i
< GET_MODE_SIZE (mode
); i
++)
418 if (WORDS_BIG_ENDIAN
)
419 j
= GET_MODE_SIZE (mode
) - i
- 1;
420 if (BYTES_BIG_ENDIAN
!= WORDS_BIG_ENDIAN
421 && GET_MODE_SIZE (mode
) > UNITS_PER_WORD
)
422 j
= j
+ UNITS_PER_WORD
- 2 * (j
% UNITS_PER_WORD
) - 1;
424 gcc_assert (j
<= 2 * HOST_BITS_PER_WIDE_INT
);
427 ch
= (unsigned char) str
[i
];
428 c
[j
/ HOST_BITS_PER_WIDE_INT
] |= ch
<< (j
% HOST_BITS_PER_WIDE_INT
);
430 return immed_double_const (c
[0], c
[1], mode
);
433 /* Cast a target constant CST to target CHAR and if that value fits into
434 host char type, return zero and put that value into variable pointed to by
438 target_char_cast (tree cst
, char *p
)
440 unsigned HOST_WIDE_INT val
, hostval
;
442 if (!host_integerp (cst
, 1)
443 || CHAR_TYPE_SIZE
> HOST_BITS_PER_WIDE_INT
)
446 val
= tree_low_cst (cst
, 1);
447 if (CHAR_TYPE_SIZE
< HOST_BITS_PER_WIDE_INT
)
448 val
&= (((unsigned HOST_WIDE_INT
) 1) << CHAR_TYPE_SIZE
) - 1;
451 if (HOST_BITS_PER_CHAR
< HOST_BITS_PER_WIDE_INT
)
452 hostval
&= (((unsigned HOST_WIDE_INT
) 1) << HOST_BITS_PER_CHAR
) - 1;
461 /* Similar to save_expr, but assumes that arbitrary code is not executed
462 in between the multiple evaluations. In particular, we assume that a
463 non-addressable local variable will not be modified. */
466 builtin_save_expr (tree exp
)
468 if (TREE_ADDRESSABLE (exp
) == 0
469 && (TREE_CODE (exp
) == PARM_DECL
470 || (TREE_CODE (exp
) == VAR_DECL
&& !TREE_STATIC (exp
))))
473 return save_expr (exp
);
476 /* Given TEM, a pointer to a stack frame, follow the dynamic chain COUNT
477 times to get the address of either a higher stack frame, or a return
478 address located within it (depending on FNDECL_CODE). */
481 expand_builtin_return_addr (enum built_in_function fndecl_code
, int count
)
485 #ifdef INITIAL_FRAME_ADDRESS_RTX
486 rtx tem
= INITIAL_FRAME_ADDRESS_RTX
;
490 /* For a zero count, we don't care what frame address we return, so frame
491 pointer elimination is OK, and using the soft frame pointer is OK.
492 For a non-zero count, we require a stable offset from the current frame
493 pointer to the previous one, so we must use the hard frame pointer, and
494 we must disable frame pointer elimination. */
496 tem
= frame_pointer_rtx
;
499 tem
= hard_frame_pointer_rtx
;
501 /* Tell reload not to eliminate the frame pointer. */
502 current_function_accesses_prior_frames
= 1;
506 /* Some machines need special handling before we can access
507 arbitrary frames. For example, on the sparc, we must first flush
508 all register windows to the stack. */
509 #ifdef SETUP_FRAME_ADDRESSES
511 SETUP_FRAME_ADDRESSES ();
514 /* On the sparc, the return address is not in the frame, it is in a
515 register. There is no way to access it off of the current frame
516 pointer, but it can be accessed off the previous frame pointer by
517 reading the value from the register window save area. */
518 #ifdef RETURN_ADDR_IN_PREVIOUS_FRAME
519 if (fndecl_code
== BUILT_IN_RETURN_ADDRESS
)
523 /* Scan back COUNT frames to the specified frame. */
524 for (i
= 0; i
< count
; i
++)
526 /* Assume the dynamic chain pointer is in the word that the
527 frame address points to, unless otherwise specified. */
528 #ifdef DYNAMIC_CHAIN_ADDRESS
529 tem
= DYNAMIC_CHAIN_ADDRESS (tem
);
531 tem
= memory_address (Pmode
, tem
);
532 tem
= gen_frame_mem (Pmode
, tem
);
533 tem
= copy_to_reg (tem
);
536 /* For __builtin_frame_address, return what we've got. */
537 if (fndecl_code
== BUILT_IN_FRAME_ADDRESS
)
540 /* For __builtin_return_address, Get the return address from that
542 #ifdef RETURN_ADDR_RTX
543 tem
= RETURN_ADDR_RTX (count
, tem
);
545 tem
= memory_address (Pmode
,
546 plus_constant (tem
, GET_MODE_SIZE (Pmode
)));
547 tem
= gen_frame_mem (Pmode
, tem
);
552 /* Alias set used for setjmp buffer. */
553 static HOST_WIDE_INT setjmp_alias_set
= -1;
555 /* Construct the leading half of a __builtin_setjmp call. Control will
556 return to RECEIVER_LABEL. This is used directly by sjlj exception
560 expand_builtin_setjmp_setup (rtx buf_addr
, rtx receiver_label
)
562 enum machine_mode sa_mode
= STACK_SAVEAREA_MODE (SAVE_NONLOCAL
);
566 if (setjmp_alias_set
== -1)
567 setjmp_alias_set
= new_alias_set ();
569 buf_addr
= convert_memory_address (Pmode
, buf_addr
);
571 buf_addr
= force_reg (Pmode
, force_operand (buf_addr
, NULL_RTX
));
573 /* We store the frame pointer and the address of receiver_label in
574 the buffer and use the rest of it for the stack save area, which
575 is machine-dependent. */
577 mem
= gen_rtx_MEM (Pmode
, buf_addr
);
578 set_mem_alias_set (mem
, setjmp_alias_set
);
579 emit_move_insn (mem
, targetm
.builtin_setjmp_frame_value ());
581 mem
= gen_rtx_MEM (Pmode
, plus_constant (buf_addr
, GET_MODE_SIZE (Pmode
))),
582 set_mem_alias_set (mem
, setjmp_alias_set
);
584 emit_move_insn (validize_mem (mem
),
585 force_reg (Pmode
, gen_rtx_LABEL_REF (Pmode
, receiver_label
)));
587 stack_save
= gen_rtx_MEM (sa_mode
,
588 plus_constant (buf_addr
,
589 2 * GET_MODE_SIZE (Pmode
)));
590 set_mem_alias_set (stack_save
, setjmp_alias_set
);
591 emit_stack_save (SAVE_NONLOCAL
, &stack_save
, NULL_RTX
);
593 /* If there is further processing to do, do it. */
594 #ifdef HAVE_builtin_setjmp_setup
595 if (HAVE_builtin_setjmp_setup
)
596 emit_insn (gen_builtin_setjmp_setup (buf_addr
));
599 /* Tell optimize_save_area_alloca that extra work is going to
600 need to go on during alloca. */
601 current_function_calls_setjmp
= 1;
603 /* Set this so all the registers get saved in our frame; we need to be
604 able to copy the saved values for any registers from frames we unwind. */
605 current_function_has_nonlocal_label
= 1;
608 /* Construct the trailing part of a __builtin_setjmp call.
609 This is used directly by sjlj exception handling code. */
612 expand_builtin_setjmp_receiver (rtx receiver_label ATTRIBUTE_UNUSED
)
614 /* Clobber the FP when we get here, so we have to make sure it's
615 marked as used by this function. */
616 emit_insn (gen_rtx_USE (VOIDmode
, hard_frame_pointer_rtx
));
618 /* Mark the static chain as clobbered here so life information
619 doesn't get messed up for it. */
620 emit_insn (gen_rtx_CLOBBER (VOIDmode
, static_chain_rtx
));
622 /* Now put in the code to restore the frame pointer, and argument
623 pointer, if needed. */
624 #ifdef HAVE_nonlocal_goto
625 if (! HAVE_nonlocal_goto
)
627 emit_move_insn (virtual_stack_vars_rtx
, hard_frame_pointer_rtx
);
629 #if ARG_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
630 if (fixed_regs
[ARG_POINTER_REGNUM
])
632 #ifdef ELIMINABLE_REGS
634 static const struct elims
{const int from
, to
;} elim_regs
[] = ELIMINABLE_REGS
;
636 for (i
= 0; i
< ARRAY_SIZE (elim_regs
); i
++)
637 if (elim_regs
[i
].from
== ARG_POINTER_REGNUM
638 && elim_regs
[i
].to
== HARD_FRAME_POINTER_REGNUM
)
641 if (i
== ARRAY_SIZE (elim_regs
))
644 /* Now restore our arg pointer from the address at which it
645 was saved in our stack frame. */
646 emit_move_insn (virtual_incoming_args_rtx
,
647 copy_to_reg (get_arg_pointer_save_area (cfun
)));
652 #ifdef HAVE_builtin_setjmp_receiver
653 if (HAVE_builtin_setjmp_receiver
)
654 emit_insn (gen_builtin_setjmp_receiver (receiver_label
));
657 #ifdef HAVE_nonlocal_goto_receiver
658 if (HAVE_nonlocal_goto_receiver
)
659 emit_insn (gen_nonlocal_goto_receiver ());
664 /* @@@ This is a kludge. Not all machine descriptions define a blockage
665 insn, but we must not allow the code we just generated to be reordered
666 by scheduling. Specifically, the update of the frame pointer must
667 happen immediately, not later. So emit an ASM_INPUT to act as blockage
669 emit_insn (gen_rtx_ASM_INPUT (VOIDmode
, ""));
672 /* __builtin_setjmp is passed a pointer to an array of five words (not
673 all will be used on all machines). It operates similarly to the C
674 library function of the same name, but is more efficient. Much of
675 the code below (and for longjmp) is copied from the handling of
678 NOTE: This is intended for use by GNAT and the exception handling
679 scheme in the compiler and will only work in the method used by
683 expand_builtin_setjmp (tree arglist
, rtx target
)
685 rtx buf_addr
, next_lab
, cont_lab
;
687 if (!validate_arglist (arglist
, POINTER_TYPE
, VOID_TYPE
))
690 if (target
== 0 || !REG_P (target
)
691 || REGNO (target
) < FIRST_PSEUDO_REGISTER
)
692 target
= gen_reg_rtx (TYPE_MODE (integer_type_node
));
694 buf_addr
= expand_expr (TREE_VALUE (arglist
), NULL_RTX
, VOIDmode
, 0);
696 next_lab
= gen_label_rtx ();
697 cont_lab
= gen_label_rtx ();
699 expand_builtin_setjmp_setup (buf_addr
, next_lab
);
701 /* Set TARGET to zero and branch to the continue label. Use emit_jump to
702 ensure that pending stack adjustments are flushed. */
703 emit_move_insn (target
, const0_rtx
);
704 emit_jump (cont_lab
);
706 emit_label (next_lab
);
708 expand_builtin_setjmp_receiver (next_lab
);
710 /* Set TARGET to one. */
711 emit_move_insn (target
, const1_rtx
);
712 emit_label (cont_lab
);
714 /* Tell flow about the strange goings on. Putting `next_lab' on
715 `nonlocal_goto_handler_labels' to indicates that function
716 calls may traverse the arc back to this label. */
718 current_function_has_nonlocal_label
= 1;
719 nonlocal_goto_handler_labels
720 = gen_rtx_EXPR_LIST (VOIDmode
, next_lab
, nonlocal_goto_handler_labels
);
725 /* __builtin_longjmp is passed a pointer to an array of five words (not
726 all will be used on all machines). It operates similarly to the C
727 library function of the same name, but is more efficient. Much of
728 the code below is copied from the handling of non-local gotos.
730 NOTE: This is intended for use by GNAT and the exception handling
731 scheme in the compiler and will only work in the method used by
735 expand_builtin_longjmp (rtx buf_addr
, rtx value
)
737 rtx fp
, lab
, stack
, insn
, last
;
738 enum machine_mode sa_mode
= STACK_SAVEAREA_MODE (SAVE_NONLOCAL
);
740 if (setjmp_alias_set
== -1)
741 setjmp_alias_set
= new_alias_set ();
743 buf_addr
= convert_memory_address (Pmode
, buf_addr
);
745 buf_addr
= force_reg (Pmode
, buf_addr
);
747 /* We used to store value in static_chain_rtx, but that fails if pointers
748 are smaller than integers. We instead require that the user must pass
749 a second argument of 1, because that is what builtin_setjmp will
750 return. This also makes EH slightly more efficient, since we are no
751 longer copying around a value that we don't care about. */
752 gcc_assert (value
== const1_rtx
);
754 last
= get_last_insn ();
755 #ifdef HAVE_builtin_longjmp
756 if (HAVE_builtin_longjmp
)
757 emit_insn (gen_builtin_longjmp (buf_addr
));
761 fp
= gen_rtx_MEM (Pmode
, buf_addr
);
762 lab
= gen_rtx_MEM (Pmode
, plus_constant (buf_addr
,
763 GET_MODE_SIZE (Pmode
)));
765 stack
= gen_rtx_MEM (sa_mode
, plus_constant (buf_addr
,
766 2 * GET_MODE_SIZE (Pmode
)));
767 set_mem_alias_set (fp
, setjmp_alias_set
);
768 set_mem_alias_set (lab
, setjmp_alias_set
);
769 set_mem_alias_set (stack
, setjmp_alias_set
);
771 /* Pick up FP, label, and SP from the block and jump. This code is
772 from expand_goto in stmt.c; see there for detailed comments. */
773 #if HAVE_nonlocal_goto
774 if (HAVE_nonlocal_goto
)
775 /* We have to pass a value to the nonlocal_goto pattern that will
776 get copied into the static_chain pointer, but it does not matter
777 what that value is, because builtin_setjmp does not use it. */
778 emit_insn (gen_nonlocal_goto (value
, lab
, stack
, fp
));
782 lab
= copy_to_reg (lab
);
784 emit_insn (gen_rtx_CLOBBER (VOIDmode
,
785 gen_rtx_MEM (BLKmode
,
786 gen_rtx_SCRATCH (VOIDmode
))));
787 emit_insn (gen_rtx_CLOBBER (VOIDmode
,
788 gen_rtx_MEM (BLKmode
,
789 hard_frame_pointer_rtx
)));
791 emit_move_insn (hard_frame_pointer_rtx
, fp
);
792 emit_stack_restore (SAVE_NONLOCAL
, stack
, NULL_RTX
);
794 emit_insn (gen_rtx_USE (VOIDmode
, hard_frame_pointer_rtx
));
795 emit_insn (gen_rtx_USE (VOIDmode
, stack_pointer_rtx
));
796 emit_indirect_jump (lab
);
800 /* Search backwards and mark the jump insn as a non-local goto.
801 Note that this precludes the use of __builtin_longjmp to a
802 __builtin_setjmp target in the same function. However, we've
803 already cautioned the user that these functions are for
804 internal exception handling use only. */
805 for (insn
= get_last_insn (); insn
; insn
= PREV_INSN (insn
))
807 gcc_assert (insn
!= last
);
811 REG_NOTES (insn
) = alloc_EXPR_LIST (REG_NON_LOCAL_GOTO
, const0_rtx
,
815 else if (CALL_P (insn
))
820 /* Expand a call to __builtin_nonlocal_goto. We're passed the target label
821 and the address of the save area. */
824 expand_builtin_nonlocal_goto (tree arglist
)
826 tree t_label
, t_save_area
;
827 rtx r_label
, r_save_area
, r_fp
, r_sp
, insn
;
829 if (!validate_arglist (arglist
, POINTER_TYPE
, POINTER_TYPE
, VOID_TYPE
))
832 t_label
= TREE_VALUE (arglist
);
833 arglist
= TREE_CHAIN (arglist
);
834 t_save_area
= TREE_VALUE (arglist
);
836 r_label
= expand_expr (t_label
, NULL_RTX
, VOIDmode
, 0);
837 r_label
= convert_memory_address (Pmode
, r_label
);
838 r_save_area
= expand_expr (t_save_area
, NULL_RTX
, VOIDmode
, 0);
839 r_save_area
= convert_memory_address (Pmode
, r_save_area
);
840 r_fp
= gen_rtx_MEM (Pmode
, r_save_area
);
841 r_sp
= gen_rtx_MEM (STACK_SAVEAREA_MODE (SAVE_NONLOCAL
),
842 plus_constant (r_save_area
, GET_MODE_SIZE (Pmode
)));
844 current_function_has_nonlocal_goto
= 1;
846 #if HAVE_nonlocal_goto
847 /* ??? We no longer need to pass the static chain value, afaik. */
848 if (HAVE_nonlocal_goto
)
849 emit_insn (gen_nonlocal_goto (const0_rtx
, r_label
, r_sp
, r_fp
));
853 r_label
= copy_to_reg (r_label
);
855 emit_insn (gen_rtx_CLOBBER (VOIDmode
,
856 gen_rtx_MEM (BLKmode
,
857 gen_rtx_SCRATCH (VOIDmode
))));
859 emit_insn (gen_rtx_CLOBBER (VOIDmode
,
860 gen_rtx_MEM (BLKmode
,
861 hard_frame_pointer_rtx
)));
863 /* Restore frame pointer for containing function.
864 This sets the actual hard register used for the frame pointer
865 to the location of the function's incoming static chain info.
866 The non-local goto handler will then adjust it to contain the
867 proper value and reload the argument pointer, if needed. */
868 emit_move_insn (hard_frame_pointer_rtx
, r_fp
);
869 emit_stack_restore (SAVE_NONLOCAL
, r_sp
, NULL_RTX
);
871 /* USE of hard_frame_pointer_rtx added for consistency;
872 not clear if really needed. */
873 emit_insn (gen_rtx_USE (VOIDmode
, hard_frame_pointer_rtx
));
874 emit_insn (gen_rtx_USE (VOIDmode
, stack_pointer_rtx
));
875 emit_indirect_jump (r_label
);
878 /* Search backwards to the jump insn and mark it as a
880 for (insn
= get_last_insn (); insn
; insn
= PREV_INSN (insn
))
884 REG_NOTES (insn
) = alloc_EXPR_LIST (REG_NON_LOCAL_GOTO
,
885 const0_rtx
, REG_NOTES (insn
));
888 else if (CALL_P (insn
))
895 /* __builtin_update_setjmp_buf is passed a pointer to an array of five words
896 (not all will be used on all machines) that was passed to __builtin_setjmp.
897 It updates the stack pointer in that block to correspond to the current
901 expand_builtin_update_setjmp_buf (rtx buf_addr
)
903 enum machine_mode sa_mode
= Pmode
;
907 #ifdef HAVE_save_stack_nonlocal
908 if (HAVE_save_stack_nonlocal
)
909 sa_mode
= insn_data
[(int) CODE_FOR_save_stack_nonlocal
].operand
[0].mode
;
911 #ifdef STACK_SAVEAREA_MODE
912 sa_mode
= STACK_SAVEAREA_MODE (SAVE_NONLOCAL
);
916 = gen_rtx_MEM (sa_mode
,
919 plus_constant (buf_addr
, 2 * GET_MODE_SIZE (Pmode
))));
923 emit_insn (gen_setjmp ());
926 emit_stack_save (SAVE_NONLOCAL
, &stack_save
, NULL_RTX
);
929 /* Expand a call to __builtin_prefetch. For a target that does not support
930 data prefetch, evaluate the memory address argument in case it has side
934 expand_builtin_prefetch (tree arglist
)
936 tree arg0
, arg1
, arg2
;
939 if (!validate_arglist (arglist
, POINTER_TYPE
, 0))
942 arg0
= TREE_VALUE (arglist
);
943 /* Arguments 1 and 2 are optional; argument 1 (read/write) defaults to
944 zero (read) and argument 2 (locality) defaults to 3 (high degree of
946 if (TREE_CHAIN (arglist
))
948 arg1
= TREE_VALUE (TREE_CHAIN (arglist
));
949 if (TREE_CHAIN (TREE_CHAIN (arglist
)))
950 arg2
= TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist
)));
952 arg2
= build_int_cst (NULL_TREE
, 3);
956 arg1
= integer_zero_node
;
957 arg2
= build_int_cst (NULL_TREE
, 3);
960 /* Argument 0 is an address. */
961 op0
= expand_expr (arg0
, NULL_RTX
, Pmode
, EXPAND_NORMAL
);
963 /* Argument 1 (read/write flag) must be a compile-time constant int. */
964 if (TREE_CODE (arg1
) != INTEGER_CST
)
966 error ("second argument to %<__builtin_prefetch%> must be a constant");
967 arg1
= integer_zero_node
;
969 op1
= expand_expr (arg1
, NULL_RTX
, VOIDmode
, 0);
970 /* Argument 1 must be either zero or one. */
971 if (INTVAL (op1
) != 0 && INTVAL (op1
) != 1)
973 warning (0, "invalid second argument to %<__builtin_prefetch%>;"
978 /* Argument 2 (locality) must be a compile-time constant int. */
979 if (TREE_CODE (arg2
) != INTEGER_CST
)
981 error ("third argument to %<__builtin_prefetch%> must be a constant");
982 arg2
= integer_zero_node
;
984 op2
= expand_expr (arg2
, NULL_RTX
, VOIDmode
, 0);
985 /* Argument 2 must be 0, 1, 2, or 3. */
986 if (INTVAL (op2
) < 0 || INTVAL (op2
) > 3)
988 warning (0, "invalid third argument to %<__builtin_prefetch%>; using zero");
995 if ((! (*insn_data
[(int) CODE_FOR_prefetch
].operand
[0].predicate
)
997 insn_data
[(int) CODE_FOR_prefetch
].operand
[0].mode
))
998 || (GET_MODE (op0
) != Pmode
))
1000 op0
= convert_memory_address (Pmode
, op0
);
1001 op0
= force_reg (Pmode
, op0
);
1003 emit_insn (gen_prefetch (op0
, op1
, op2
));
1007 /* Don't do anything with direct references to volatile memory, but
1008 generate code to handle other side effects. */
1009 if (!MEM_P (op0
) && side_effects_p (op0
))
1013 /* Get a MEM rtx for expression EXP which is the address of an operand
1014 to be used in a string instruction (cmpstrsi, movmemsi, ..). LEN is
1015 the maximum length of the block of memory that might be accessed or
1019 get_memory_rtx (tree exp
, tree len
)
1021 rtx addr
= expand_expr (exp
, NULL_RTX
, ptr_mode
, EXPAND_NORMAL
);
1022 rtx mem
= gen_rtx_MEM (BLKmode
, memory_address (BLKmode
, addr
));
1024 /* Get an expression we can use to find the attributes to assign to MEM.
1025 If it is an ADDR_EXPR, use the operand. Otherwise, dereference it if
1026 we can. First remove any nops. */
1027 while ((TREE_CODE (exp
) == NOP_EXPR
|| TREE_CODE (exp
) == CONVERT_EXPR
1028 || TREE_CODE (exp
) == NON_LVALUE_EXPR
)
1029 && POINTER_TYPE_P (TREE_TYPE (TREE_OPERAND (exp
, 0))))
1030 exp
= TREE_OPERAND (exp
, 0);
1032 if (TREE_CODE (exp
) == ADDR_EXPR
)
1033 exp
= TREE_OPERAND (exp
, 0);
1034 else if (POINTER_TYPE_P (TREE_TYPE (exp
)))
1035 exp
= build1 (INDIRECT_REF
, TREE_TYPE (TREE_TYPE (exp
)), exp
);
1039 /* Honor attributes derived from exp, except for the alias set
1040 (as builtin stringops may alias with anything) and the size
1041 (as stringops may access multiple array elements). */
1044 set_mem_attributes (mem
, exp
, 0);
1046 /* Allow the string and memory builtins to overflow from one
1047 field into another, see http://gcc.gnu.org/PR23561.
1048 Thus avoid COMPONENT_REFs in MEM_EXPR unless we know the whole
1049 memory accessed by the string or memory builtin will fit
1050 within the field. */
1051 if (MEM_EXPR (mem
) && TREE_CODE (MEM_EXPR (mem
)) == COMPONENT_REF
)
1053 tree mem_expr
= MEM_EXPR (mem
);
1054 HOST_WIDE_INT offset
= -1, length
= -1;
1057 while (TREE_CODE (inner
) == ARRAY_REF
1058 || TREE_CODE (inner
) == NOP_EXPR
1059 || TREE_CODE (inner
) == CONVERT_EXPR
1060 || TREE_CODE (inner
) == NON_LVALUE_EXPR
1061 || TREE_CODE (inner
) == VIEW_CONVERT_EXPR
1062 || TREE_CODE (inner
) == SAVE_EXPR
)
1063 inner
= TREE_OPERAND (inner
, 0);
1065 gcc_assert (TREE_CODE (inner
) == COMPONENT_REF
);
1067 if (MEM_OFFSET (mem
)
1068 && GET_CODE (MEM_OFFSET (mem
)) == CONST_INT
)
1069 offset
= INTVAL (MEM_OFFSET (mem
));
1071 if (offset
>= 0 && len
&& host_integerp (len
, 0))
1072 length
= tree_low_cst (len
, 0);
1074 while (TREE_CODE (inner
) == COMPONENT_REF
)
1076 tree field
= TREE_OPERAND (inner
, 1);
1077 gcc_assert (! DECL_BIT_FIELD (field
));
1078 gcc_assert (TREE_CODE (mem_expr
) == COMPONENT_REF
);
1079 gcc_assert (field
== TREE_OPERAND (mem_expr
, 1));
1082 && TYPE_SIZE_UNIT (TREE_TYPE (inner
))
1083 && host_integerp (TYPE_SIZE_UNIT (TREE_TYPE (inner
)), 0))
1086 = tree_low_cst (TYPE_SIZE_UNIT (TREE_TYPE (inner
)), 0);
1087 /* If we can prove the memory starting at XEXP (mem, 0)
1088 and ending at XEXP (mem, 0) + LENGTH will fit into
1089 this field, we can keep that COMPONENT_REF in MEM_EXPR. */
1092 && offset
+ length
<= size
)
1097 && host_integerp (DECL_FIELD_OFFSET (field
), 0))
1098 offset
+= tree_low_cst (DECL_FIELD_OFFSET (field
), 0)
1099 + tree_low_cst (DECL_FIELD_BIT_OFFSET (field
), 1)
1107 mem_expr
= TREE_OPERAND (mem_expr
, 0);
1108 inner
= TREE_OPERAND (inner
, 0);
1111 if (mem_expr
== NULL
)
1113 if (mem_expr
!= MEM_EXPR (mem
))
1115 set_mem_expr (mem
, mem_expr
);
1116 set_mem_offset (mem
, offset
>= 0 ? GEN_INT (offset
) : NULL_RTX
);
1119 set_mem_alias_set (mem
, 0);
1120 set_mem_size (mem
, NULL_RTX
);
1126 /* Built-in functions to perform an untyped call and return. */
1128 /* For each register that may be used for calling a function, this
1129 gives a mode used to copy the register's value. VOIDmode indicates
1130 the register is not used for calling a function. If the machine
1131 has register windows, this gives only the outbound registers.
1132 INCOMING_REGNO gives the corresponding inbound register. */
1133 static enum machine_mode apply_args_mode
[FIRST_PSEUDO_REGISTER
];
1135 /* For each register that may be used for returning values, this gives
1136 a mode used to copy the register's value. VOIDmode indicates the
1137 register is not used for returning values. If the machine has
1138 register windows, this gives only the outbound registers.
1139 INCOMING_REGNO gives the corresponding inbound register. */
1140 static enum machine_mode apply_result_mode
[FIRST_PSEUDO_REGISTER
];
1142 /* For each register that may be used for calling a function, this
1143 gives the offset of that register into the block returned by
1144 __builtin_apply_args. 0 indicates that the register is not
1145 used for calling a function. */
1146 static int apply_args_reg_offset
[FIRST_PSEUDO_REGISTER
];
1148 /* Return the size required for the block returned by __builtin_apply_args,
1149 and initialize apply_args_mode. */
1152 apply_args_size (void)
1154 static int size
= -1;
1157 enum machine_mode mode
;
1159 /* The values computed by this function never change. */
1162 /* The first value is the incoming arg-pointer. */
1163 size
= GET_MODE_SIZE (Pmode
);
1165 /* The second value is the structure value address unless this is
1166 passed as an "invisible" first argument. */
1167 if (targetm
.calls
.struct_value_rtx (cfun
? TREE_TYPE (cfun
->decl
) : 0, 0))
1168 size
+= GET_MODE_SIZE (Pmode
);
1170 for (regno
= 0; regno
< FIRST_PSEUDO_REGISTER
; regno
++)
1171 if (FUNCTION_ARG_REGNO_P (regno
))
1173 mode
= reg_raw_mode
[regno
];
1175 gcc_assert (mode
!= VOIDmode
);
1177 align
= GET_MODE_ALIGNMENT (mode
) / BITS_PER_UNIT
;
1178 if (size
% align
!= 0)
1179 size
= CEIL (size
, align
) * align
;
1180 apply_args_reg_offset
[regno
] = size
;
1181 size
+= GET_MODE_SIZE (mode
);
1182 apply_args_mode
[regno
] = mode
;
1186 apply_args_mode
[regno
] = VOIDmode
;
1187 apply_args_reg_offset
[regno
] = 0;
1193 /* Return the size required for the block returned by __builtin_apply,
1194 and initialize apply_result_mode. */
1197 apply_result_size (void)
1199 static int size
= -1;
1201 enum machine_mode mode
;
1203 /* The values computed by this function never change. */
1208 for (regno
= 0; regno
< FIRST_PSEUDO_REGISTER
; regno
++)
1209 if (FUNCTION_VALUE_REGNO_P (regno
))
1211 mode
= reg_raw_mode
[regno
];
1213 gcc_assert (mode
!= VOIDmode
);
1215 align
= GET_MODE_ALIGNMENT (mode
) / BITS_PER_UNIT
;
1216 if (size
% align
!= 0)
1217 size
= CEIL (size
, align
) * align
;
1218 size
+= GET_MODE_SIZE (mode
);
1219 apply_result_mode
[regno
] = mode
;
1222 apply_result_mode
[regno
] = VOIDmode
;
1224 /* Allow targets that use untyped_call and untyped_return to override
1225 the size so that machine-specific information can be stored here. */
1226 #ifdef APPLY_RESULT_SIZE
1227 size
= APPLY_RESULT_SIZE
;
1233 #if defined (HAVE_untyped_call) || defined (HAVE_untyped_return)
1234 /* Create a vector describing the result block RESULT. If SAVEP is true,
1235 the result block is used to save the values; otherwise it is used to
1236 restore the values. */
1239 result_vector (int savep
, rtx result
)
1241 int regno
, size
, align
, nelts
;
1242 enum machine_mode mode
;
1244 rtx
*savevec
= alloca (FIRST_PSEUDO_REGISTER
* sizeof (rtx
));
1247 for (regno
= 0; regno
< FIRST_PSEUDO_REGISTER
; regno
++)
1248 if ((mode
= apply_result_mode
[regno
]) != VOIDmode
)
1250 align
= GET_MODE_ALIGNMENT (mode
) / BITS_PER_UNIT
;
1251 if (size
% align
!= 0)
1252 size
= CEIL (size
, align
) * align
;
1253 reg
= gen_rtx_REG (mode
, savep
? regno
: INCOMING_REGNO (regno
));
1254 mem
= adjust_address (result
, mode
, size
);
1255 savevec
[nelts
++] = (savep
1256 ? gen_rtx_SET (VOIDmode
, mem
, reg
)
1257 : gen_rtx_SET (VOIDmode
, reg
, mem
));
1258 size
+= GET_MODE_SIZE (mode
);
1260 return gen_rtx_PARALLEL (VOIDmode
, gen_rtvec_v (nelts
, savevec
));
1262 #endif /* HAVE_untyped_call or HAVE_untyped_return */
1264 /* Save the state required to perform an untyped call with the same
1265 arguments as were passed to the current function. */
1268 expand_builtin_apply_args_1 (void)
1271 int size
, align
, regno
;
1272 enum machine_mode mode
;
1273 rtx struct_incoming_value
= targetm
.calls
.struct_value_rtx (cfun
? TREE_TYPE (cfun
->decl
) : 0, 1);
1275 /* Create a block where the arg-pointer, structure value address,
1276 and argument registers can be saved. */
1277 registers
= assign_stack_local (BLKmode
, apply_args_size (), -1);
1279 /* Walk past the arg-pointer and structure value address. */
1280 size
= GET_MODE_SIZE (Pmode
);
1281 if (targetm
.calls
.struct_value_rtx (cfun
? TREE_TYPE (cfun
->decl
) : 0, 0))
1282 size
+= GET_MODE_SIZE (Pmode
);
1284 /* Save each register used in calling a function to the block. */
1285 for (regno
= 0; regno
< FIRST_PSEUDO_REGISTER
; regno
++)
1286 if ((mode
= apply_args_mode
[regno
]) != VOIDmode
)
1288 align
= GET_MODE_ALIGNMENT (mode
) / BITS_PER_UNIT
;
1289 if (size
% align
!= 0)
1290 size
= CEIL (size
, align
) * align
;
1292 tem
= gen_rtx_REG (mode
, INCOMING_REGNO (regno
));
1294 emit_move_insn (adjust_address (registers
, mode
, size
), tem
);
1295 size
+= GET_MODE_SIZE (mode
);
1298 /* Save the arg pointer to the block. */
1299 tem
= copy_to_reg (virtual_incoming_args_rtx
);
1300 #ifdef STACK_GROWS_DOWNWARD
1301 /* We need the pointer as the caller actually passed them to us, not
1302 as we might have pretended they were passed. Make sure it's a valid
1303 operand, as emit_move_insn isn't expected to handle a PLUS. */
1305 = force_operand (plus_constant (tem
, current_function_pretend_args_size
),
1308 emit_move_insn (adjust_address (registers
, Pmode
, 0), tem
);
1310 size
= GET_MODE_SIZE (Pmode
);
1312 /* Save the structure value address unless this is passed as an
1313 "invisible" first argument. */
1314 if (struct_incoming_value
)
1316 emit_move_insn (adjust_address (registers
, Pmode
, size
),
1317 copy_to_reg (struct_incoming_value
));
1318 size
+= GET_MODE_SIZE (Pmode
);
1321 /* Return the address of the block. */
1322 return copy_addr_to_reg (XEXP (registers
, 0));
1325 /* __builtin_apply_args returns block of memory allocated on
1326 the stack into which is stored the arg pointer, structure
1327 value address, static chain, and all the registers that might
1328 possibly be used in performing a function call. The code is
1329 moved to the start of the function so the incoming values are
1333 expand_builtin_apply_args (void)
1335 /* Don't do __builtin_apply_args more than once in a function.
1336 Save the result of the first call and reuse it. */
1337 if (apply_args_value
!= 0)
1338 return apply_args_value
;
1340 /* When this function is called, it means that registers must be
1341 saved on entry to this function. So we migrate the
1342 call to the first insn of this function. */
1347 temp
= expand_builtin_apply_args_1 ();
1351 apply_args_value
= temp
;
1353 /* Put the insns after the NOTE that starts the function.
1354 If this is inside a start_sequence, make the outer-level insn
1355 chain current, so the code is placed at the start of the
1357 push_topmost_sequence ();
1358 emit_insn_before (seq
, NEXT_INSN (entry_of_function ()));
1359 pop_topmost_sequence ();
1364 /* Perform an untyped call and save the state required to perform an
1365 untyped return of whatever value was returned by the given function. */
1368 expand_builtin_apply (rtx function
, rtx arguments
, rtx argsize
)
1370 int size
, align
, regno
;
1371 enum machine_mode mode
;
1372 rtx incoming_args
, result
, reg
, dest
, src
, call_insn
;
1373 rtx old_stack_level
= 0;
1374 rtx call_fusage
= 0;
1375 rtx struct_value
= targetm
.calls
.struct_value_rtx (cfun
? TREE_TYPE (cfun
->decl
) : 0, 0);
1377 arguments
= convert_memory_address (Pmode
, arguments
);
1379 /* Create a block where the return registers can be saved. */
1380 result
= assign_stack_local (BLKmode
, apply_result_size (), -1);
1382 /* Fetch the arg pointer from the ARGUMENTS block. */
1383 incoming_args
= gen_reg_rtx (Pmode
);
1384 emit_move_insn (incoming_args
, gen_rtx_MEM (Pmode
, arguments
));
1385 #ifndef STACK_GROWS_DOWNWARD
1386 incoming_args
= expand_simple_binop (Pmode
, MINUS
, incoming_args
, argsize
,
1387 incoming_args
, 0, OPTAB_LIB_WIDEN
);
1390 /* Push a new argument block and copy the arguments. Do not allow
1391 the (potential) memcpy call below to interfere with our stack
1393 do_pending_stack_adjust ();
1396 /* Save the stack with nonlocal if available. */
1397 #ifdef HAVE_save_stack_nonlocal
1398 if (HAVE_save_stack_nonlocal
)
1399 emit_stack_save (SAVE_NONLOCAL
, &old_stack_level
, NULL_RTX
);
1402 emit_stack_save (SAVE_BLOCK
, &old_stack_level
, NULL_RTX
);
1404 /* Allocate a block of memory onto the stack and copy the memory
1405 arguments to the outgoing arguments address. */
1406 allocate_dynamic_stack_space (argsize
, 0, BITS_PER_UNIT
);
1407 dest
= virtual_outgoing_args_rtx
;
1408 #ifndef STACK_GROWS_DOWNWARD
1409 if (GET_CODE (argsize
) == CONST_INT
)
1410 dest
= plus_constant (dest
, -INTVAL (argsize
));
1412 dest
= gen_rtx_PLUS (Pmode
, dest
, negate_rtx (Pmode
, argsize
));
1414 dest
= gen_rtx_MEM (BLKmode
, dest
);
1415 set_mem_align (dest
, PARM_BOUNDARY
);
1416 src
= gen_rtx_MEM (BLKmode
, incoming_args
);
1417 set_mem_align (src
, PARM_BOUNDARY
);
1418 emit_block_move (dest
, src
, argsize
, BLOCK_OP_NORMAL
);
1420 /* Refer to the argument block. */
1422 arguments
= gen_rtx_MEM (BLKmode
, arguments
);
1423 set_mem_align (arguments
, PARM_BOUNDARY
);
1425 /* Walk past the arg-pointer and structure value address. */
1426 size
= GET_MODE_SIZE (Pmode
);
1428 size
+= GET_MODE_SIZE (Pmode
);
1430 /* Restore each of the registers previously saved. Make USE insns
1431 for each of these registers for use in making the call. */
1432 for (regno
= 0; regno
< FIRST_PSEUDO_REGISTER
; regno
++)
1433 if ((mode
= apply_args_mode
[regno
]) != VOIDmode
)
1435 align
= GET_MODE_ALIGNMENT (mode
) / BITS_PER_UNIT
;
1436 if (size
% align
!= 0)
1437 size
= CEIL (size
, align
) * align
;
1438 reg
= gen_rtx_REG (mode
, regno
);
1439 emit_move_insn (reg
, adjust_address (arguments
, mode
, size
));
1440 use_reg (&call_fusage
, reg
);
1441 size
+= GET_MODE_SIZE (mode
);
1444 /* Restore the structure value address unless this is passed as an
1445 "invisible" first argument. */
1446 size
= GET_MODE_SIZE (Pmode
);
1449 rtx value
= gen_reg_rtx (Pmode
);
1450 emit_move_insn (value
, adjust_address (arguments
, Pmode
, size
));
1451 emit_move_insn (struct_value
, value
);
1452 if (REG_P (struct_value
))
1453 use_reg (&call_fusage
, struct_value
);
1454 size
+= GET_MODE_SIZE (Pmode
);
1457 /* All arguments and registers used for the call are set up by now! */
1458 function
= prepare_call_address (function
, NULL
, &call_fusage
, 0, 0);
1460 /* Ensure address is valid. SYMBOL_REF is already valid, so no need,
1461 and we don't want to load it into a register as an optimization,
1462 because prepare_call_address already did it if it should be done. */
1463 if (GET_CODE (function
) != SYMBOL_REF
)
1464 function
= memory_address (FUNCTION_MODE
, function
);
1466 /* Generate the actual call instruction and save the return value. */
1467 #ifdef HAVE_untyped_call
1468 if (HAVE_untyped_call
)
1469 emit_call_insn (gen_untyped_call (gen_rtx_MEM (FUNCTION_MODE
, function
),
1470 result
, result_vector (1, result
)));
1473 #ifdef HAVE_call_value
1474 if (HAVE_call_value
)
1478 /* Locate the unique return register. It is not possible to
1479 express a call that sets more than one return register using
1480 call_value; use untyped_call for that. In fact, untyped_call
1481 only needs to save the return registers in the given block. */
1482 for (regno
= 0; regno
< FIRST_PSEUDO_REGISTER
; regno
++)
1483 if ((mode
= apply_result_mode
[regno
]) != VOIDmode
)
1485 gcc_assert (!valreg
); /* HAVE_untyped_call required. */
1487 valreg
= gen_rtx_REG (mode
, regno
);
1490 emit_call_insn (GEN_CALL_VALUE (valreg
,
1491 gen_rtx_MEM (FUNCTION_MODE
, function
),
1492 const0_rtx
, NULL_RTX
, const0_rtx
));
1494 emit_move_insn (adjust_address (result
, GET_MODE (valreg
), 0), valreg
);
1500 /* Find the CALL insn we just emitted, and attach the register usage
1502 call_insn
= last_call_insn ();
1503 add_function_usage_to (call_insn
, call_fusage
);
1505 /* Restore the stack. */
1506 #ifdef HAVE_save_stack_nonlocal
1507 if (HAVE_save_stack_nonlocal
)
1508 emit_stack_restore (SAVE_NONLOCAL
, old_stack_level
, NULL_RTX
);
1511 emit_stack_restore (SAVE_BLOCK
, old_stack_level
, NULL_RTX
);
1515 /* Return the address of the result block. */
1516 result
= copy_addr_to_reg (XEXP (result
, 0));
1517 return convert_memory_address (ptr_mode
, result
);
1520 /* Perform an untyped return. */
1523 expand_builtin_return (rtx result
)
1525 int size
, align
, regno
;
1526 enum machine_mode mode
;
1528 rtx call_fusage
= 0;
1530 result
= convert_memory_address (Pmode
, result
);
1532 apply_result_size ();
1533 result
= gen_rtx_MEM (BLKmode
, result
);
1535 #ifdef HAVE_untyped_return
1536 if (HAVE_untyped_return
)
1538 emit_jump_insn (gen_untyped_return (result
, result_vector (0, result
)));
1544 /* Restore the return value and note that each value is used. */
1546 for (regno
= 0; regno
< FIRST_PSEUDO_REGISTER
; regno
++)
1547 if ((mode
= apply_result_mode
[regno
]) != VOIDmode
)
1549 align
= GET_MODE_ALIGNMENT (mode
) / BITS_PER_UNIT
;
1550 if (size
% align
!= 0)
1551 size
= CEIL (size
, align
) * align
;
1552 reg
= gen_rtx_REG (mode
, INCOMING_REGNO (regno
));
1553 emit_move_insn (reg
, adjust_address (result
, mode
, size
));
1555 push_to_sequence (call_fusage
);
1556 emit_insn (gen_rtx_USE (VOIDmode
, reg
));
1557 call_fusage
= get_insns ();
1559 size
+= GET_MODE_SIZE (mode
);
1562 /* Put the USE insns before the return. */
1563 emit_insn (call_fusage
);
1565 /* Return whatever values was restored by jumping directly to the end
1567 expand_naked_return ();
1570 /* Used by expand_builtin_classify_type and fold_builtin_classify_type. */
1572 static enum type_class
1573 type_to_class (tree type
)
1575 switch (TREE_CODE (type
))
1577 case VOID_TYPE
: return void_type_class
;
1578 case INTEGER_TYPE
: return integer_type_class
;
1579 case CHAR_TYPE
: return char_type_class
;
1580 case ENUMERAL_TYPE
: return enumeral_type_class
;
1581 case BOOLEAN_TYPE
: return boolean_type_class
;
1582 case POINTER_TYPE
: return pointer_type_class
;
1583 case REFERENCE_TYPE
: return reference_type_class
;
1584 case OFFSET_TYPE
: return offset_type_class
;
1585 case REAL_TYPE
: return real_type_class
;
1586 case COMPLEX_TYPE
: return complex_type_class
;
1587 case FUNCTION_TYPE
: return function_type_class
;
1588 case METHOD_TYPE
: return method_type_class
;
1589 case RECORD_TYPE
: return record_type_class
;
1591 case QUAL_UNION_TYPE
: return union_type_class
;
1592 case ARRAY_TYPE
: return (TYPE_STRING_FLAG (type
)
1593 ? string_type_class
: array_type_class
);
1594 case LANG_TYPE
: return lang_type_class
;
1595 default: return no_type_class
;
1599 /* Expand a call to __builtin_classify_type with arguments found in
1603 expand_builtin_classify_type (tree arglist
)
1606 return GEN_INT (type_to_class (TREE_TYPE (TREE_VALUE (arglist
))));
1607 return GEN_INT (no_type_class
);
1610 /* This helper macro, meant to be used in mathfn_built_in below,
1611 determines which among a set of three builtin math functions is
1612 appropriate for a given type mode. The `F' and `L' cases are
1613 automatically generated from the `double' case. */
1614 #define CASE_MATHFN(BUILT_IN_MATHFN) \
1615 case BUILT_IN_MATHFN: case BUILT_IN_MATHFN##F: case BUILT_IN_MATHFN##L: \
1616 fcode = BUILT_IN_MATHFN; fcodef = BUILT_IN_MATHFN##F ; \
1617 fcodel = BUILT_IN_MATHFN##L ; break;
1619 /* Return mathematic function equivalent to FN but operating directly
1620 on TYPE, if available. If we can't do the conversion, return zero. */
1622 mathfn_built_in (tree type
, enum built_in_function fn
)
1624 enum built_in_function fcode
, fcodef
, fcodel
;
1628 CASE_MATHFN (BUILT_IN_ACOS
)
1629 CASE_MATHFN (BUILT_IN_ACOSH
)
1630 CASE_MATHFN (BUILT_IN_ASIN
)
1631 CASE_MATHFN (BUILT_IN_ASINH
)
1632 CASE_MATHFN (BUILT_IN_ATAN
)
1633 CASE_MATHFN (BUILT_IN_ATAN2
)
1634 CASE_MATHFN (BUILT_IN_ATANH
)
1635 CASE_MATHFN (BUILT_IN_CBRT
)
1636 CASE_MATHFN (BUILT_IN_CEIL
)
1637 CASE_MATHFN (BUILT_IN_COPYSIGN
)
1638 CASE_MATHFN (BUILT_IN_COS
)
1639 CASE_MATHFN (BUILT_IN_COSH
)
1640 CASE_MATHFN (BUILT_IN_DREM
)
1641 CASE_MATHFN (BUILT_IN_ERF
)
1642 CASE_MATHFN (BUILT_IN_ERFC
)
1643 CASE_MATHFN (BUILT_IN_EXP
)
1644 CASE_MATHFN (BUILT_IN_EXP10
)
1645 CASE_MATHFN (BUILT_IN_EXP2
)
1646 CASE_MATHFN (BUILT_IN_EXPM1
)
1647 CASE_MATHFN (BUILT_IN_FABS
)
1648 CASE_MATHFN (BUILT_IN_FDIM
)
1649 CASE_MATHFN (BUILT_IN_FLOOR
)
1650 CASE_MATHFN (BUILT_IN_FMA
)
1651 CASE_MATHFN (BUILT_IN_FMAX
)
1652 CASE_MATHFN (BUILT_IN_FMIN
)
1653 CASE_MATHFN (BUILT_IN_FMOD
)
1654 CASE_MATHFN (BUILT_IN_FREXP
)
1655 CASE_MATHFN (BUILT_IN_GAMMA
)
1656 CASE_MATHFN (BUILT_IN_HUGE_VAL
)
1657 CASE_MATHFN (BUILT_IN_HYPOT
)
1658 CASE_MATHFN (BUILT_IN_ILOGB
)
1659 CASE_MATHFN (BUILT_IN_INF
)
1660 CASE_MATHFN (BUILT_IN_J0
)
1661 CASE_MATHFN (BUILT_IN_J1
)
1662 CASE_MATHFN (BUILT_IN_JN
)
1663 CASE_MATHFN (BUILT_IN_LCEIL
)
1664 CASE_MATHFN (BUILT_IN_LDEXP
)
1665 CASE_MATHFN (BUILT_IN_LFLOOR
)
1666 CASE_MATHFN (BUILT_IN_LGAMMA
)
1667 CASE_MATHFN (BUILT_IN_LLCEIL
)
1668 CASE_MATHFN (BUILT_IN_LLFLOOR
)
1669 CASE_MATHFN (BUILT_IN_LLRINT
)
1670 CASE_MATHFN (BUILT_IN_LLROUND
)
1671 CASE_MATHFN (BUILT_IN_LOG
)
1672 CASE_MATHFN (BUILT_IN_LOG10
)
1673 CASE_MATHFN (BUILT_IN_LOG1P
)
1674 CASE_MATHFN (BUILT_IN_LOG2
)
1675 CASE_MATHFN (BUILT_IN_LOGB
)
1676 CASE_MATHFN (BUILT_IN_LRINT
)
1677 CASE_MATHFN (BUILT_IN_LROUND
)
1678 CASE_MATHFN (BUILT_IN_MODF
)
1679 CASE_MATHFN (BUILT_IN_NAN
)
1680 CASE_MATHFN (BUILT_IN_NANS
)
1681 CASE_MATHFN (BUILT_IN_NEARBYINT
)
1682 CASE_MATHFN (BUILT_IN_NEXTAFTER
)
1683 CASE_MATHFN (BUILT_IN_NEXTTOWARD
)
1684 CASE_MATHFN (BUILT_IN_POW
)
1685 CASE_MATHFN (BUILT_IN_POWI
)
1686 CASE_MATHFN (BUILT_IN_POW10
)
1687 CASE_MATHFN (BUILT_IN_REMAINDER
)
1688 CASE_MATHFN (BUILT_IN_REMQUO
)
1689 CASE_MATHFN (BUILT_IN_RINT
)
1690 CASE_MATHFN (BUILT_IN_ROUND
)
1691 CASE_MATHFN (BUILT_IN_SCALB
)
1692 CASE_MATHFN (BUILT_IN_SCALBLN
)
1693 CASE_MATHFN (BUILT_IN_SCALBN
)
1694 CASE_MATHFN (BUILT_IN_SIGNIFICAND
)
1695 CASE_MATHFN (BUILT_IN_SIN
)
1696 CASE_MATHFN (BUILT_IN_SINCOS
)
1697 CASE_MATHFN (BUILT_IN_SINH
)
1698 CASE_MATHFN (BUILT_IN_SQRT
)
1699 CASE_MATHFN (BUILT_IN_TAN
)
1700 CASE_MATHFN (BUILT_IN_TANH
)
1701 CASE_MATHFN (BUILT_IN_TGAMMA
)
1702 CASE_MATHFN (BUILT_IN_TRUNC
)
1703 CASE_MATHFN (BUILT_IN_Y0
)
1704 CASE_MATHFN (BUILT_IN_Y1
)
1705 CASE_MATHFN (BUILT_IN_YN
)
1711 if (TYPE_MAIN_VARIANT (type
) == double_type_node
)
1712 return implicit_built_in_decls
[fcode
];
1713 else if (TYPE_MAIN_VARIANT (type
) == float_type_node
)
1714 return implicit_built_in_decls
[fcodef
];
1715 else if (TYPE_MAIN_VARIANT (type
) == long_double_type_node
)
1716 return implicit_built_in_decls
[fcodel
];
1721 /* If errno must be maintained, expand the RTL to check if the result,
1722 TARGET, of a built-in function call, EXP, is NaN, and if so set
1726 expand_errno_check (tree exp
, rtx target
)
1728 rtx lab
= gen_label_rtx ();
1730 /* Test the result; if it is NaN, set errno=EDOM because
1731 the argument was not in the domain. */
1732 emit_cmp_and_jump_insns (target
, target
, EQ
, 0, GET_MODE (target
),
1736 /* If this built-in doesn't throw an exception, set errno directly. */
1737 if (TREE_NOTHROW (TREE_OPERAND (TREE_OPERAND (exp
, 0), 0)))
1739 #ifdef GEN_ERRNO_RTX
1740 rtx errno_rtx
= GEN_ERRNO_RTX
;
1743 = gen_rtx_MEM (word_mode
, gen_rtx_SYMBOL_REF (Pmode
, "errno"));
1745 emit_move_insn (errno_rtx
, GEN_INT (TARGET_EDOM
));
1751 /* We can't set errno=EDOM directly; let the library call do it.
1752 Pop the arguments right away in case the call gets deleted. */
1754 expand_call (exp
, target
, 0);
1760 /* Expand a call to one of the builtin math functions (sqrt, exp, or log).
1761 Return 0 if a normal call should be emitted rather than expanding the
1762 function in-line. EXP is the expression that is a call to the builtin
1763 function; if convenient, the result should be placed in TARGET.
1764 SUBTARGET may be used as the target for computing one of EXP's operands. */
1767 expand_builtin_mathfn (tree exp
, rtx target
, rtx subtarget
)
1769 optab builtin_optab
;
1770 rtx op0
, insns
, before_call
;
1771 tree fndecl
= get_callee_fndecl (exp
);
1772 tree arglist
= TREE_OPERAND (exp
, 1);
1773 enum machine_mode mode
;
1774 bool errno_set
= false;
1777 if (!validate_arglist (arglist
, REAL_TYPE
, VOID_TYPE
))
1780 arg
= TREE_VALUE (arglist
);
1782 switch (DECL_FUNCTION_CODE (fndecl
))
1785 case BUILT_IN_SQRTF
:
1786 case BUILT_IN_SQRTL
:
1787 errno_set
= ! tree_expr_nonnegative_p (arg
);
1788 builtin_optab
= sqrt_optab
;
1793 errno_set
= true; builtin_optab
= exp_optab
; break;
1794 case BUILT_IN_EXP10
:
1795 case BUILT_IN_EXP10F
:
1796 case BUILT_IN_EXP10L
:
1797 case BUILT_IN_POW10
:
1798 case BUILT_IN_POW10F
:
1799 case BUILT_IN_POW10L
:
1800 errno_set
= true; builtin_optab
= exp10_optab
; break;
1802 case BUILT_IN_EXP2F
:
1803 case BUILT_IN_EXP2L
:
1804 errno_set
= true; builtin_optab
= exp2_optab
; break;
1805 case BUILT_IN_EXPM1
:
1806 case BUILT_IN_EXPM1F
:
1807 case BUILT_IN_EXPM1L
:
1808 errno_set
= true; builtin_optab
= expm1_optab
; break;
1810 case BUILT_IN_LOGBF
:
1811 case BUILT_IN_LOGBL
:
1812 errno_set
= true; builtin_optab
= logb_optab
; break;
1813 case BUILT_IN_ILOGB
:
1814 case BUILT_IN_ILOGBF
:
1815 case BUILT_IN_ILOGBL
:
1816 errno_set
= true; builtin_optab
= ilogb_optab
; break;
1820 errno_set
= true; builtin_optab
= log_optab
; break;
1821 case BUILT_IN_LOG10
:
1822 case BUILT_IN_LOG10F
:
1823 case BUILT_IN_LOG10L
:
1824 errno_set
= true; builtin_optab
= log10_optab
; break;
1826 case BUILT_IN_LOG2F
:
1827 case BUILT_IN_LOG2L
:
1828 errno_set
= true; builtin_optab
= log2_optab
; break;
1829 case BUILT_IN_LOG1P
:
1830 case BUILT_IN_LOG1PF
:
1831 case BUILT_IN_LOG1PL
:
1832 errno_set
= true; builtin_optab
= log1p_optab
; break;
1834 case BUILT_IN_ASINF
:
1835 case BUILT_IN_ASINL
:
1836 builtin_optab
= asin_optab
; break;
1838 case BUILT_IN_ACOSF
:
1839 case BUILT_IN_ACOSL
:
1840 builtin_optab
= acos_optab
; break;
1844 builtin_optab
= tan_optab
; break;
1846 case BUILT_IN_ATANF
:
1847 case BUILT_IN_ATANL
:
1848 builtin_optab
= atan_optab
; break;
1849 case BUILT_IN_FLOOR
:
1850 case BUILT_IN_FLOORF
:
1851 case BUILT_IN_FLOORL
:
1852 builtin_optab
= floor_optab
; break;
1854 case BUILT_IN_CEILF
:
1855 case BUILT_IN_CEILL
:
1856 builtin_optab
= ceil_optab
; break;
1857 case BUILT_IN_TRUNC
:
1858 case BUILT_IN_TRUNCF
:
1859 case BUILT_IN_TRUNCL
:
1860 builtin_optab
= btrunc_optab
; break;
1861 case BUILT_IN_ROUND
:
1862 case BUILT_IN_ROUNDF
:
1863 case BUILT_IN_ROUNDL
:
1864 builtin_optab
= round_optab
; break;
1865 case BUILT_IN_NEARBYINT
:
1866 case BUILT_IN_NEARBYINTF
:
1867 case BUILT_IN_NEARBYINTL
:
1868 builtin_optab
= nearbyint_optab
; break;
1870 case BUILT_IN_RINTF
:
1871 case BUILT_IN_RINTL
:
1872 builtin_optab
= rint_optab
; break;
1873 case BUILT_IN_LRINT
:
1874 case BUILT_IN_LRINTF
:
1875 case BUILT_IN_LRINTL
:
1876 case BUILT_IN_LLRINT
:
1877 case BUILT_IN_LLRINTF
:
1878 case BUILT_IN_LLRINTL
:
1879 builtin_optab
= lrint_optab
; break;
1884 /* Make a suitable register to place result in. */
1885 mode
= TYPE_MODE (TREE_TYPE (exp
));
1887 if (! flag_errno_math
|| ! HONOR_NANS (mode
))
1890 /* Before working hard, check whether the instruction is available. */
1891 if (builtin_optab
->handlers
[(int) mode
].insn_code
!= CODE_FOR_nothing
)
1893 target
= gen_reg_rtx (mode
);
1895 /* Wrap the computation of the argument in a SAVE_EXPR, as we may
1896 need to expand the argument again. This way, we will not perform
1897 side-effects more the once. */
1898 narg
= builtin_save_expr (arg
);
1902 arglist
= build_tree_list (NULL_TREE
, arg
);
1903 exp
= build_function_call_expr (fndecl
, arglist
);
1906 op0
= expand_expr (arg
, subtarget
, VOIDmode
, 0);
1910 /* Compute into TARGET.
1911 Set TARGET to wherever the result comes back. */
1912 target
= expand_unop (mode
, builtin_optab
, op0
, target
, 0);
1917 expand_errno_check (exp
, target
);
1919 /* Output the entire sequence. */
1920 insns
= get_insns ();
1926 /* If we were unable to expand via the builtin, stop the sequence
1927 (without outputting the insns) and call to the library function
1928 with the stabilized argument list. */
1932 before_call
= get_last_insn ();
1934 target
= expand_call (exp
, target
, target
== const0_rtx
);
1936 /* If this is a sqrt operation and we don't care about errno, try to
1937 attach a REG_EQUAL note with a SQRT rtx to the emitted libcall.
1938 This allows the semantics of the libcall to be visible to the RTL
1940 if (builtin_optab
== sqrt_optab
&& !errno_set
)
1942 /* Search backwards through the insns emitted by expand_call looking
1943 for the instruction with the REG_RETVAL note. */
1944 rtx last
= get_last_insn ();
1945 while (last
!= before_call
)
1947 if (find_reg_note (last
, REG_RETVAL
, NULL
))
1949 rtx note
= find_reg_note (last
, REG_EQUAL
, NULL
);
1950 /* Check that the REQ_EQUAL note is an EXPR_LIST with
1951 two elements, i.e. symbol_ref(sqrt) and the operand. */
1953 && GET_CODE (note
) == EXPR_LIST
1954 && GET_CODE (XEXP (note
, 0)) == EXPR_LIST
1955 && XEXP (XEXP (note
, 0), 1) != NULL_RTX
1956 && XEXP (XEXP (XEXP (note
, 0), 1), 1) == NULL_RTX
)
1958 rtx operand
= XEXP (XEXP (XEXP (note
, 0), 1), 0);
1959 /* Check operand is a register with expected mode. */
1962 && GET_MODE (operand
) == mode
)
1964 /* Replace the REG_EQUAL note with a SQRT rtx. */
1965 rtx equiv
= gen_rtx_SQRT (mode
, operand
);
1966 set_unique_reg_note (last
, REG_EQUAL
, equiv
);
1971 last
= PREV_INSN (last
);
1978 /* Expand a call to the builtin binary math functions (pow and atan2).
1979 Return 0 if a normal call should be emitted rather than expanding the
1980 function in-line. EXP is the expression that is a call to the builtin
1981 function; if convenient, the result should be placed in TARGET.
1982 SUBTARGET may be used as the target for computing one of EXP's
1986 expand_builtin_mathfn_2 (tree exp
, rtx target
, rtx subtarget
)
1988 optab builtin_optab
;
1989 rtx op0
, op1
, insns
;
1990 int op1_type
= REAL_TYPE
;
1991 tree fndecl
= get_callee_fndecl (exp
);
1992 tree arglist
= TREE_OPERAND (exp
, 1);
1993 tree arg0
, arg1
, temp
, narg
;
1994 enum machine_mode mode
;
1995 bool errno_set
= true;
1998 if ((DECL_FUNCTION_CODE (fndecl
) == BUILT_IN_LDEXP
)
1999 || (DECL_FUNCTION_CODE (fndecl
) == BUILT_IN_LDEXPF
)
2000 || (DECL_FUNCTION_CODE (fndecl
) == BUILT_IN_LDEXPL
))
2001 op1_type
= INTEGER_TYPE
;
2003 if (!validate_arglist (arglist
, REAL_TYPE
, op1_type
, VOID_TYPE
))
2006 arg0
= TREE_VALUE (arglist
);
2007 arg1
= TREE_VALUE (TREE_CHAIN (arglist
));
2009 switch (DECL_FUNCTION_CODE (fndecl
))
2014 builtin_optab
= pow_optab
; break;
2015 case BUILT_IN_ATAN2
:
2016 case BUILT_IN_ATAN2F
:
2017 case BUILT_IN_ATAN2L
:
2018 builtin_optab
= atan2_optab
; break;
2019 case BUILT_IN_LDEXP
:
2020 case BUILT_IN_LDEXPF
:
2021 case BUILT_IN_LDEXPL
:
2022 builtin_optab
= ldexp_optab
; break;
2024 case BUILT_IN_FMODF
:
2025 case BUILT_IN_FMODL
:
2026 builtin_optab
= fmod_optab
; break;
2028 case BUILT_IN_DREMF
:
2029 case BUILT_IN_DREML
:
2030 builtin_optab
= drem_optab
; break;
2035 /* Make a suitable register to place result in. */
2036 mode
= TYPE_MODE (TREE_TYPE (exp
));
2038 /* Before working hard, check whether the instruction is available. */
2039 if (builtin_optab
->handlers
[(int) mode
].insn_code
== CODE_FOR_nothing
)
2042 target
= gen_reg_rtx (mode
);
2044 if (! flag_errno_math
|| ! HONOR_NANS (mode
))
2047 /* Always stabilize the argument list. */
2048 narg
= builtin_save_expr (arg1
);
2052 temp
= build_tree_list (NULL_TREE
, narg
);
2056 temp
= TREE_CHAIN (arglist
);
2058 narg
= builtin_save_expr (arg0
);
2062 arglist
= tree_cons (NULL_TREE
, narg
, temp
);
2066 arglist
= tree_cons (NULL_TREE
, arg0
, temp
);
2069 exp
= build_function_call_expr (fndecl
, arglist
);
2071 op0
= expand_expr (arg0
, subtarget
, VOIDmode
, 0);
2072 op1
= expand_expr (arg1
, 0, VOIDmode
, 0);
2076 /* Compute into TARGET.
2077 Set TARGET to wherever the result comes back. */
2078 target
= expand_binop (mode
, builtin_optab
, op0
, op1
,
2079 target
, 0, OPTAB_DIRECT
);
2081 /* If we were unable to expand via the builtin, stop the sequence
2082 (without outputting the insns) and call to the library function
2083 with the stabilized argument list. */
2087 return expand_call (exp
, target
, target
== const0_rtx
);
2091 expand_errno_check (exp
, target
);
2093 /* Output the entire sequence. */
2094 insns
= get_insns ();
2101 /* Expand a call to the builtin sin and cos math functions.
2102 Return 0 if a normal call should be emitted rather than expanding the
2103 function in-line. EXP is the expression that is a call to the builtin
2104 function; if convenient, the result should be placed in TARGET.
2105 SUBTARGET may be used as the target for computing one of EXP's
2109 expand_builtin_mathfn_3 (tree exp
, rtx target
, rtx subtarget
)
2111 optab builtin_optab
;
2113 tree fndecl
= get_callee_fndecl (exp
);
2114 tree arglist
= TREE_OPERAND (exp
, 1);
2115 enum machine_mode mode
;
2116 bool errno_set
= false;
2119 if (!validate_arglist (arglist
, REAL_TYPE
, VOID_TYPE
))
2122 arg
= TREE_VALUE (arglist
);
2124 switch (DECL_FUNCTION_CODE (fndecl
))
2132 builtin_optab
= sincos_optab
; break;
2137 /* Make a suitable register to place result in. */
2138 mode
= TYPE_MODE (TREE_TYPE (exp
));
2140 if (! flag_errno_math
|| ! HONOR_NANS (mode
))
2143 /* Check if sincos insn is available, otherwise fallback
2144 to sin or cos insn. */
2145 if (builtin_optab
->handlers
[(int) mode
].insn_code
== CODE_FOR_nothing
) {
2146 switch (DECL_FUNCTION_CODE (fndecl
))
2151 builtin_optab
= sin_optab
; break;
2155 builtin_optab
= cos_optab
; break;
2161 /* Before working hard, check whether the instruction is available. */
2162 if (builtin_optab
->handlers
[(int) mode
].insn_code
!= CODE_FOR_nothing
)
2164 target
= gen_reg_rtx (mode
);
2166 /* Wrap the computation of the argument in a SAVE_EXPR, as we may
2167 need to expand the argument again. This way, we will not perform
2168 side-effects more the once. */
2169 narg
= save_expr (arg
);
2173 arglist
= build_tree_list (NULL_TREE
, arg
);
2174 exp
= build_function_call_expr (fndecl
, arglist
);
2177 op0
= expand_expr (arg
, subtarget
, VOIDmode
, 0);
2181 /* Compute into TARGET.
2182 Set TARGET to wherever the result comes back. */
2183 if (builtin_optab
== sincos_optab
)
2187 switch (DECL_FUNCTION_CODE (fndecl
))
2192 result
= expand_twoval_unop (builtin_optab
, op0
, 0, target
, 0);
2197 result
= expand_twoval_unop (builtin_optab
, op0
, target
, 0, 0);
2202 gcc_assert (result
);
2206 target
= expand_unop (mode
, builtin_optab
, op0
, target
, 0);
2212 expand_errno_check (exp
, target
);
2214 /* Output the entire sequence. */
2215 insns
= get_insns ();
2221 /* If we were unable to expand via the builtin, stop the sequence
2222 (without outputting the insns) and call to the library function
2223 with the stabilized argument list. */
2227 target
= expand_call (exp
, target
, target
== const0_rtx
);
2232 /* Expand a call to one of the builtin rounding functions (lfloor).
2233 If expanding via optab fails, lower expression to (int)(floor(x)).
2234 EXP is the expression that is a call to the builtin function;
2235 if convenient, the result should be placed in TARGET. SUBTARGET may
2236 be used as the target for computing one of EXP's operands. */
2239 expand_builtin_int_roundingfn (tree exp
, rtx target
, rtx subtarget
)
2241 optab builtin_optab
;
2242 rtx op0
, insns
, tmp
;
2243 tree fndecl
= get_callee_fndecl (exp
);
2244 tree arglist
= TREE_OPERAND (exp
, 1);
2245 enum built_in_function fallback_fn
;
2246 tree fallback_fndecl
;
2247 enum machine_mode mode
;
2250 if (!validate_arglist (arglist
, REAL_TYPE
, VOID_TYPE
))
2253 arg
= TREE_VALUE (arglist
);
2255 switch (DECL_FUNCTION_CODE (fndecl
))
2257 case BUILT_IN_LCEIL
:
2258 case BUILT_IN_LCEILF
:
2259 case BUILT_IN_LCEILL
:
2260 case BUILT_IN_LLCEIL
:
2261 case BUILT_IN_LLCEILF
:
2262 case BUILT_IN_LLCEILL
:
2263 builtin_optab
= lceil_optab
;
2264 fallback_fn
= BUILT_IN_CEIL
;
2267 case BUILT_IN_LFLOOR
:
2268 case BUILT_IN_LFLOORF
:
2269 case BUILT_IN_LFLOORL
:
2270 case BUILT_IN_LLFLOOR
:
2271 case BUILT_IN_LLFLOORF
:
2272 case BUILT_IN_LLFLOORL
:
2273 builtin_optab
= lfloor_optab
;
2274 fallback_fn
= BUILT_IN_FLOOR
;
2281 /* Make a suitable register to place result in. */
2282 mode
= TYPE_MODE (TREE_TYPE (exp
));
2284 /* Before working hard, check whether the instruction is available. */
2285 if (builtin_optab
->handlers
[(int) mode
].insn_code
!= CODE_FOR_nothing
)
2287 target
= gen_reg_rtx (mode
);
2289 /* Wrap the computation of the argument in a SAVE_EXPR, as we may
2290 need to expand the argument again. This way, we will not perform
2291 side-effects more the once. */
2292 narg
= builtin_save_expr (arg
);
2296 arglist
= build_tree_list (NULL_TREE
, arg
);
2297 exp
= build_function_call_expr (fndecl
, arglist
);
2300 op0
= expand_expr (arg
, subtarget
, VOIDmode
, 0);
2304 /* Compute into TARGET.
2305 Set TARGET to wherever the result comes back. */
2306 target
= expand_unop (mode
, builtin_optab
, op0
, target
, 0);
2310 /* Output the entire sequence. */
2311 insns
= get_insns ();
2317 /* If we were unable to expand via the builtin, stop the sequence
2318 (without outputting the insns). */
2322 /* Fall back to floating point rounding optab. */
2323 fallback_fndecl
= mathfn_built_in (TREE_TYPE (arg
), fallback_fn
);
2324 /* We shouldn't get here on targets without TARGET_C99_FUNCTIONS.
2325 ??? Perhaps convert (int)floorf(x) into (int)floor((double)x). */
2326 gcc_assert (fallback_fndecl
!= NULL_TREE
);
2327 exp
= build_function_call_expr (fallback_fndecl
, arglist
);
2329 tmp
= expand_builtin_mathfn (exp
, NULL_RTX
, NULL_RTX
);
2331 /* Truncate the result of floating point optab to integer
2332 via expand_fix (). */
2333 target
= gen_reg_rtx (mode
);
2334 expand_fix (target
, tmp
, 0);
2339 /* To evaluate powi(x,n), the floating point value x raised to the
2340 constant integer exponent n, we use a hybrid algorithm that
2341 combines the "window method" with look-up tables. For an
2342 introduction to exponentiation algorithms and "addition chains",
2343 see section 4.6.3, "Evaluation of Powers" of Donald E. Knuth,
2344 "Seminumerical Algorithms", Vol. 2, "The Art of Computer Programming",
2345 3rd Edition, 1998, and Daniel M. Gordon, "A Survey of Fast Exponentiation
2346 Methods", Journal of Algorithms, Vol. 27, pp. 129-146, 1998. */
2348 /* Provide a default value for POWI_MAX_MULTS, the maximum number of
2349 multiplications to inline before calling the system library's pow
2350 function. powi(x,n) requires at worst 2*bits(n)-2 multiplications,
2351 so this default never requires calling pow, powf or powl. */
2353 #ifndef POWI_MAX_MULTS
2354 #define POWI_MAX_MULTS (2*HOST_BITS_PER_WIDE_INT-2)
2357 /* The size of the "optimal power tree" lookup table. All
2358 exponents less than this value are simply looked up in the
2359 powi_table below. This threshold is also used to size the
2360 cache of pseudo registers that hold intermediate results. */
2361 #define POWI_TABLE_SIZE 256
2363 /* The size, in bits of the window, used in the "window method"
2364 exponentiation algorithm. This is equivalent to a radix of
2365 (1<<POWI_WINDOW_SIZE) in the corresponding "m-ary method". */
2366 #define POWI_WINDOW_SIZE 3
2368 /* The following table is an efficient representation of an
2369 "optimal power tree". For each value, i, the corresponding
2370 value, j, in the table states than an optimal evaluation
2371 sequence for calculating pow(x,i) can be found by evaluating
2372 pow(x,j)*pow(x,i-j). An optimal power tree for the first
2373 100 integers is given in Knuth's "Seminumerical algorithms". */
2375 static const unsigned char powi_table
[POWI_TABLE_SIZE
] =
2377 0, 1, 1, 2, 2, 3, 3, 4, /* 0 - 7 */
2378 4, 6, 5, 6, 6, 10, 7, 9, /* 8 - 15 */
2379 8, 16, 9, 16, 10, 12, 11, 13, /* 16 - 23 */
2380 12, 17, 13, 18, 14, 24, 15, 26, /* 24 - 31 */
2381 16, 17, 17, 19, 18, 33, 19, 26, /* 32 - 39 */
2382 20, 25, 21, 40, 22, 27, 23, 44, /* 40 - 47 */
2383 24, 32, 25, 34, 26, 29, 27, 44, /* 48 - 55 */
2384 28, 31, 29, 34, 30, 60, 31, 36, /* 56 - 63 */
2385 32, 64, 33, 34, 34, 46, 35, 37, /* 64 - 71 */
2386 36, 65, 37, 50, 38, 48, 39, 69, /* 72 - 79 */
2387 40, 49, 41, 43, 42, 51, 43, 58, /* 80 - 87 */
2388 44, 64, 45, 47, 46, 59, 47, 76, /* 88 - 95 */
2389 48, 65, 49, 66, 50, 67, 51, 66, /* 96 - 103 */
2390 52, 70, 53, 74, 54, 104, 55, 74, /* 104 - 111 */
2391 56, 64, 57, 69, 58, 78, 59, 68, /* 112 - 119 */
2392 60, 61, 61, 80, 62, 75, 63, 68, /* 120 - 127 */
2393 64, 65, 65, 128, 66, 129, 67, 90, /* 128 - 135 */
2394 68, 73, 69, 131, 70, 94, 71, 88, /* 136 - 143 */
2395 72, 128, 73, 98, 74, 132, 75, 121, /* 144 - 151 */
2396 76, 102, 77, 124, 78, 132, 79, 106, /* 152 - 159 */
2397 80, 97, 81, 160, 82, 99, 83, 134, /* 160 - 167 */
2398 84, 86, 85, 95, 86, 160, 87, 100, /* 168 - 175 */
2399 88, 113, 89, 98, 90, 107, 91, 122, /* 176 - 183 */
2400 92, 111, 93, 102, 94, 126, 95, 150, /* 184 - 191 */
2401 96, 128, 97, 130, 98, 133, 99, 195, /* 192 - 199 */
2402 100, 128, 101, 123, 102, 164, 103, 138, /* 200 - 207 */
2403 104, 145, 105, 146, 106, 109, 107, 149, /* 208 - 215 */
2404 108, 200, 109, 146, 110, 170, 111, 157, /* 216 - 223 */
2405 112, 128, 113, 130, 114, 182, 115, 132, /* 224 - 231 */
2406 116, 200, 117, 132, 118, 158, 119, 206, /* 232 - 239 */
2407 120, 240, 121, 162, 122, 147, 123, 152, /* 240 - 247 */
2408 124, 166, 125, 214, 126, 138, 127, 153, /* 248 - 255 */
2412 /* Return the number of multiplications required to calculate
2413 powi(x,n) where n is less than POWI_TABLE_SIZE. This is a
2414 subroutine of powi_cost. CACHE is an array indicating
2415 which exponents have already been calculated. */
2418 powi_lookup_cost (unsigned HOST_WIDE_INT n
, bool *cache
)
2420 /* If we've already calculated this exponent, then this evaluation
2421 doesn't require any additional multiplications. */
2426 return powi_lookup_cost (n
- powi_table
[n
], cache
)
2427 + powi_lookup_cost (powi_table
[n
], cache
) + 1;
2430 /* Return the number of multiplications required to calculate
2431 powi(x,n) for an arbitrary x, given the exponent N. This
2432 function needs to be kept in sync with expand_powi below. */
2435 powi_cost (HOST_WIDE_INT n
)
2437 bool cache
[POWI_TABLE_SIZE
];
2438 unsigned HOST_WIDE_INT digit
;
2439 unsigned HOST_WIDE_INT val
;
2445 /* Ignore the reciprocal when calculating the cost. */
2446 val
= (n
< 0) ? -n
: n
;
2448 /* Initialize the exponent cache. */
2449 memset (cache
, 0, POWI_TABLE_SIZE
* sizeof (bool));
2454 while (val
>= POWI_TABLE_SIZE
)
2458 digit
= val
& ((1 << POWI_WINDOW_SIZE
) - 1);
2459 result
+= powi_lookup_cost (digit
, cache
)
2460 + POWI_WINDOW_SIZE
+ 1;
2461 val
>>= POWI_WINDOW_SIZE
;
2470 return result
+ powi_lookup_cost (val
, cache
);
2473 /* Recursive subroutine of expand_powi. This function takes the array,
2474 CACHE, of already calculated exponents and an exponent N and returns
2475 an RTX that corresponds to CACHE[1]**N, as calculated in mode MODE. */
2478 expand_powi_1 (enum machine_mode mode
, unsigned HOST_WIDE_INT n
, rtx
*cache
)
2480 unsigned HOST_WIDE_INT digit
;
2484 if (n
< POWI_TABLE_SIZE
)
2489 target
= gen_reg_rtx (mode
);
2492 op0
= expand_powi_1 (mode
, n
- powi_table
[n
], cache
);
2493 op1
= expand_powi_1 (mode
, powi_table
[n
], cache
);
2497 target
= gen_reg_rtx (mode
);
2498 digit
= n
& ((1 << POWI_WINDOW_SIZE
) - 1);
2499 op0
= expand_powi_1 (mode
, n
- digit
, cache
);
2500 op1
= expand_powi_1 (mode
, digit
, cache
);
2504 target
= gen_reg_rtx (mode
);
2505 op0
= expand_powi_1 (mode
, n
>> 1, cache
);
2509 result
= expand_mult (mode
, op0
, op1
, target
, 0);
2510 if (result
!= target
)
2511 emit_move_insn (target
, result
);
2515 /* Expand the RTL to evaluate powi(x,n) in mode MODE. X is the
2516 floating point operand in mode MODE, and N is the exponent. This
2517 function needs to be kept in sync with powi_cost above. */
2520 expand_powi (rtx x
, enum machine_mode mode
, HOST_WIDE_INT n
)
2522 unsigned HOST_WIDE_INT val
;
2523 rtx cache
[POWI_TABLE_SIZE
];
2527 return CONST1_RTX (mode
);
2529 val
= (n
< 0) ? -n
: n
;
2531 memset (cache
, 0, sizeof (cache
));
2534 result
= expand_powi_1 (mode
, (n
< 0) ? -n
: n
, cache
);
2536 /* If the original exponent was negative, reciprocate the result. */
2538 result
= expand_binop (mode
, sdiv_optab
, CONST1_RTX (mode
),
2539 result
, NULL_RTX
, 0, OPTAB_LIB_WIDEN
);
2544 /* Expand a call to the pow built-in mathematical function. Return 0 if
2545 a normal call should be emitted rather than expanding the function
2546 in-line. EXP is the expression that is a call to the builtin
2547 function; if convenient, the result should be placed in TARGET. */
2550 expand_builtin_pow (tree exp
, rtx target
, rtx subtarget
)
2552 tree arglist
= TREE_OPERAND (exp
, 1);
2555 if (! validate_arglist (arglist
, REAL_TYPE
, REAL_TYPE
, VOID_TYPE
))
2558 arg0
= TREE_VALUE (arglist
);
2559 arg1
= TREE_VALUE (TREE_CHAIN (arglist
));
2561 if (TREE_CODE (arg1
) == REAL_CST
2562 && ! TREE_CONSTANT_OVERFLOW (arg1
))
2564 REAL_VALUE_TYPE cint
;
2568 c
= TREE_REAL_CST (arg1
);
2569 n
= real_to_integer (&c
);
2570 real_from_integer (&cint
, VOIDmode
, n
, n
< 0 ? -1 : 0, 0);
2571 if (real_identical (&c
, &cint
))
2573 /* If the exponent is -1, 0, 1 or 2, then expand_powi is exact.
2574 Otherwise, check the number of multiplications required.
2575 Note that pow never sets errno for an integer exponent. */
2576 if ((n
>= -1 && n
<= 2)
2577 || (flag_unsafe_math_optimizations
2579 && powi_cost (n
) <= POWI_MAX_MULTS
))
2581 enum machine_mode mode
= TYPE_MODE (TREE_TYPE (exp
));
2582 rtx op
= expand_expr (arg0
, subtarget
, VOIDmode
, 0);
2583 op
= force_reg (mode
, op
);
2584 return expand_powi (op
, mode
, n
);
2589 if (! flag_unsafe_math_optimizations
)
2591 return expand_builtin_mathfn_2 (exp
, target
, subtarget
);
2594 /* Expand a call to the powi built-in mathematical function. Return 0 if
2595 a normal call should be emitted rather than expanding the function
2596 in-line. EXP is the expression that is a call to the builtin
2597 function; if convenient, the result should be placed in TARGET. */
2600 expand_builtin_powi (tree exp
, rtx target
, rtx subtarget
)
2602 tree arglist
= TREE_OPERAND (exp
, 1);
2605 enum machine_mode mode
;
2606 enum machine_mode mode2
;
2608 if (! validate_arglist (arglist
, REAL_TYPE
, INTEGER_TYPE
, VOID_TYPE
))
2611 arg0
= TREE_VALUE (arglist
);
2612 arg1
= TREE_VALUE (TREE_CHAIN (arglist
));
2613 mode
= TYPE_MODE (TREE_TYPE (exp
));
2615 /* Handle constant power. */
2617 if (TREE_CODE (arg1
) == INTEGER_CST
2618 && ! TREE_CONSTANT_OVERFLOW (arg1
))
2620 HOST_WIDE_INT n
= TREE_INT_CST_LOW (arg1
);
2622 /* If the exponent is -1, 0, 1 or 2, then expand_powi is exact.
2623 Otherwise, check the number of multiplications required. */
2624 if ((TREE_INT_CST_HIGH (arg1
) == 0
2625 || TREE_INT_CST_HIGH (arg1
) == -1)
2626 && ((n
>= -1 && n
<= 2)
2628 && powi_cost (n
) <= POWI_MAX_MULTS
)))
2630 op0
= expand_expr (arg0
, subtarget
, VOIDmode
, 0);
2631 op0
= force_reg (mode
, op0
);
2632 return expand_powi (op0
, mode
, n
);
2636 /* Emit a libcall to libgcc. */
2638 /* Mode of the 2nd argument must match that of an int. */
2639 mode2
= mode_for_size (INT_TYPE_SIZE
, MODE_INT
, 0);
2641 if (target
== NULL_RTX
)
2642 target
= gen_reg_rtx (mode
);
2644 op0
= expand_expr (arg0
, subtarget
, mode
, 0);
2645 if (GET_MODE (op0
) != mode
)
2646 op0
= convert_to_mode (mode
, op0
, 0);
2647 op1
= expand_expr (arg1
, 0, mode2
, 0);
2648 if (GET_MODE (op1
) != mode2
)
2649 op1
= convert_to_mode (mode2
, op1
, 0);
2651 target
= emit_library_call_value (powi_optab
->handlers
[(int) mode
].libfunc
,
2652 target
, LCT_CONST_MAKE_BLOCK
, mode
, 2,
2653 op0
, mode
, op1
, mode2
);
2658 /* Expand expression EXP which is a call to the strlen builtin. Return 0
2659 if we failed the caller should emit a normal call, otherwise
2660 try to get the result in TARGET, if convenient. */
2663 expand_builtin_strlen (tree arglist
, rtx target
,
2664 enum machine_mode target_mode
)
2666 if (!validate_arglist (arglist
, POINTER_TYPE
, VOID_TYPE
))
2671 tree len
, src
= TREE_VALUE (arglist
);
2672 rtx result
, src_reg
, char_rtx
, before_strlen
;
2673 enum machine_mode insn_mode
= target_mode
, char_mode
;
2674 enum insn_code icode
= CODE_FOR_nothing
;
2677 /* If the length can be computed at compile-time, return it. */
2678 len
= c_strlen (src
, 0);
2680 return expand_expr (len
, target
, target_mode
, EXPAND_NORMAL
);
2682 /* If the length can be computed at compile-time and is constant
2683 integer, but there are side-effects in src, evaluate
2684 src for side-effects, then return len.
2685 E.g. x = strlen (i++ ? "xfoo" + 1 : "bar");
2686 can be optimized into: i++; x = 3; */
2687 len
= c_strlen (src
, 1);
2688 if (len
&& TREE_CODE (len
) == INTEGER_CST
)
2690 expand_expr (src
, const0_rtx
, VOIDmode
, EXPAND_NORMAL
);
2691 return expand_expr (len
, target
, target_mode
, EXPAND_NORMAL
);
2694 align
= get_pointer_alignment (src
, BIGGEST_ALIGNMENT
) / BITS_PER_UNIT
;
2696 /* If SRC is not a pointer type, don't do this operation inline. */
2700 /* Bail out if we can't compute strlen in the right mode. */
2701 while (insn_mode
!= VOIDmode
)
2703 icode
= strlen_optab
->handlers
[(int) insn_mode
].insn_code
;
2704 if (icode
!= CODE_FOR_nothing
)
2707 insn_mode
= GET_MODE_WIDER_MODE (insn_mode
);
2709 if (insn_mode
== VOIDmode
)
2712 /* Make a place to write the result of the instruction. */
2716 && GET_MODE (result
) == insn_mode
2717 && REGNO (result
) >= FIRST_PSEUDO_REGISTER
))
2718 result
= gen_reg_rtx (insn_mode
);
2720 /* Make a place to hold the source address. We will not expand
2721 the actual source until we are sure that the expansion will
2722 not fail -- there are trees that cannot be expanded twice. */
2723 src_reg
= gen_reg_rtx (Pmode
);
2725 /* Mark the beginning of the strlen sequence so we can emit the
2726 source operand later. */
2727 before_strlen
= get_last_insn ();
2729 char_rtx
= const0_rtx
;
2730 char_mode
= insn_data
[(int) icode
].operand
[2].mode
;
2731 if (! (*insn_data
[(int) icode
].operand
[2].predicate
) (char_rtx
,
2733 char_rtx
= copy_to_mode_reg (char_mode
, char_rtx
);
2735 pat
= GEN_FCN (icode
) (result
, gen_rtx_MEM (BLKmode
, src_reg
),
2736 char_rtx
, GEN_INT (align
));
2741 /* Now that we are assured of success, expand the source. */
2743 pat
= expand_expr (src
, src_reg
, ptr_mode
, EXPAND_NORMAL
);
2745 emit_move_insn (src_reg
, pat
);
2750 emit_insn_after (pat
, before_strlen
);
2752 emit_insn_before (pat
, get_insns ());
2754 /* Return the value in the proper mode for this function. */
2755 if (GET_MODE (result
) == target_mode
)
2757 else if (target
!= 0)
2758 convert_move (target
, result
, 0);
2760 target
= convert_to_mode (target_mode
, result
, 0);
2766 /* Expand a call to the strstr builtin. Return 0 if we failed the
2767 caller should emit a normal call, otherwise try to get the result
2768 in TARGET, if convenient (and in mode MODE if that's convenient). */
2771 expand_builtin_strstr (tree arglist
, tree type
, rtx target
, enum machine_mode mode
)
2773 if (validate_arglist (arglist
, POINTER_TYPE
, POINTER_TYPE
, VOID_TYPE
))
2775 tree result
= fold_builtin_strstr (arglist
, type
);
2777 return expand_expr (result
, target
, mode
, EXPAND_NORMAL
);
2782 /* Expand a call to the strchr builtin. Return 0 if we failed the
2783 caller should emit a normal call, otherwise try to get the result
2784 in TARGET, if convenient (and in mode MODE if that's convenient). */
2787 expand_builtin_strchr (tree arglist
, tree type
, rtx target
, enum machine_mode mode
)
2789 if (validate_arglist (arglist
, POINTER_TYPE
, INTEGER_TYPE
, VOID_TYPE
))
2791 tree result
= fold_builtin_strchr (arglist
, type
);
2793 return expand_expr (result
, target
, mode
, EXPAND_NORMAL
);
2795 /* FIXME: Should use strchrM optab so that ports can optimize this. */
2800 /* Expand a call to the strrchr builtin. Return 0 if we failed the
2801 caller should emit a normal call, otherwise try to get the result
2802 in TARGET, if convenient (and in mode MODE if that's convenient). */
2805 expand_builtin_strrchr (tree arglist
, tree type
, rtx target
, enum machine_mode mode
)
2807 if (validate_arglist (arglist
, POINTER_TYPE
, INTEGER_TYPE
, VOID_TYPE
))
2809 tree result
= fold_builtin_strrchr (arglist
, type
);
2811 return expand_expr (result
, target
, mode
, EXPAND_NORMAL
);
2816 /* Expand a call to the strpbrk builtin. Return 0 if we failed the
2817 caller should emit a normal call, otherwise try to get the result
2818 in TARGET, if convenient (and in mode MODE if that's convenient). */
2821 expand_builtin_strpbrk (tree arglist
, tree type
, rtx target
, enum machine_mode mode
)
2823 if (validate_arglist (arglist
, POINTER_TYPE
, POINTER_TYPE
, VOID_TYPE
))
2825 tree result
= fold_builtin_strpbrk (arglist
, type
);
2827 return expand_expr (result
, target
, mode
, EXPAND_NORMAL
);
2832 /* Callback routine for store_by_pieces. Read GET_MODE_BITSIZE (MODE)
2833 bytes from constant string DATA + OFFSET and return it as target
2837 builtin_memcpy_read_str (void *data
, HOST_WIDE_INT offset
,
2838 enum machine_mode mode
)
2840 const char *str
= (const char *) data
;
2842 gcc_assert (offset
>= 0
2843 && ((unsigned HOST_WIDE_INT
) offset
+ GET_MODE_SIZE (mode
)
2844 <= strlen (str
) + 1));
2846 return c_readstr (str
+ offset
, mode
);
2849 /* Expand a call to the memcpy builtin, with arguments in ARGLIST.
2850 Return 0 if we failed, the caller should emit a normal call,
2851 otherwise try to get the result in TARGET, if convenient (and in
2852 mode MODE if that's convenient). */
2854 expand_builtin_memcpy (tree exp
, rtx target
, enum machine_mode mode
)
2856 tree fndecl
= get_callee_fndecl (exp
);
2857 tree arglist
= TREE_OPERAND (exp
, 1);
2858 if (!validate_arglist (arglist
,
2859 POINTER_TYPE
, POINTER_TYPE
, INTEGER_TYPE
, VOID_TYPE
))
2863 tree dest
= TREE_VALUE (arglist
);
2864 tree src
= TREE_VALUE (TREE_CHAIN (arglist
));
2865 tree len
= TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist
)));
2866 const char *src_str
;
2867 unsigned int src_align
= get_pointer_alignment (src
, BIGGEST_ALIGNMENT
);
2868 unsigned int dest_align
2869 = get_pointer_alignment (dest
, BIGGEST_ALIGNMENT
);
2870 rtx dest_mem
, src_mem
, dest_addr
, len_rtx
;
2871 tree result
= fold_builtin_memcpy (fndecl
, arglist
);
2874 return expand_expr (result
, target
, mode
, EXPAND_NORMAL
);
2876 /* If DEST is not a pointer type, call the normal function. */
2877 if (dest_align
== 0)
2880 /* If either SRC is not a pointer type, don't do this
2881 operation in-line. */
2885 dest_mem
= get_memory_rtx (dest
, len
);
2886 set_mem_align (dest_mem
, dest_align
);
2887 len_rtx
= expand_expr (len
, NULL_RTX
, VOIDmode
, 0);
2888 src_str
= c_getstr (src
);
2890 /* If SRC is a string constant and block move would be done
2891 by pieces, we can avoid loading the string from memory
2892 and only stored the computed constants. */
2894 && GET_CODE (len_rtx
) == CONST_INT
2895 && (unsigned HOST_WIDE_INT
) INTVAL (len_rtx
) <= strlen (src_str
) + 1
2896 && can_store_by_pieces (INTVAL (len_rtx
), builtin_memcpy_read_str
,
2897 (void *) src_str
, dest_align
))
2899 dest_mem
= store_by_pieces (dest_mem
, INTVAL (len_rtx
),
2900 builtin_memcpy_read_str
,
2901 (void *) src_str
, dest_align
, 0);
2902 dest_mem
= force_operand (XEXP (dest_mem
, 0), NULL_RTX
);
2903 dest_mem
= convert_memory_address (ptr_mode
, dest_mem
);
2907 src_mem
= get_memory_rtx (src
, len
);
2908 set_mem_align (src_mem
, src_align
);
2910 /* Copy word part most expediently. */
2911 dest_addr
= emit_block_move (dest_mem
, src_mem
, len_rtx
,
2912 CALL_EXPR_TAILCALL (exp
)
2913 ? BLOCK_OP_TAILCALL
: BLOCK_OP_NORMAL
);
2917 dest_addr
= force_operand (XEXP (dest_mem
, 0), NULL_RTX
);
2918 dest_addr
= convert_memory_address (ptr_mode
, dest_addr
);
2924 /* Expand a call to the mempcpy builtin, with arguments in ARGLIST.
2925 Return 0 if we failed; the caller should emit a normal call,
2926 otherwise try to get the result in TARGET, if convenient (and in
2927 mode MODE if that's convenient). If ENDP is 0 return the
2928 destination pointer, if ENDP is 1 return the end pointer ala
2929 mempcpy, and if ENDP is 2 return the end pointer minus one ala
2933 expand_builtin_mempcpy (tree arglist
, tree type
, rtx target
, enum machine_mode mode
,
2936 if (!validate_arglist (arglist
,
2937 POINTER_TYPE
, POINTER_TYPE
, INTEGER_TYPE
, VOID_TYPE
))
2939 /* If return value is ignored, transform mempcpy into memcpy. */
2940 else if (target
== const0_rtx
)
2942 tree fn
= implicit_built_in_decls
[BUILT_IN_MEMCPY
];
2947 return expand_expr (build_function_call_expr (fn
, arglist
),
2948 target
, mode
, EXPAND_NORMAL
);
2952 tree dest
= TREE_VALUE (arglist
);
2953 tree src
= TREE_VALUE (TREE_CHAIN (arglist
));
2954 tree len
= TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist
)));
2955 const char *src_str
;
2956 unsigned int src_align
= get_pointer_alignment (src
, BIGGEST_ALIGNMENT
);
2957 unsigned int dest_align
2958 = get_pointer_alignment (dest
, BIGGEST_ALIGNMENT
);
2959 rtx dest_mem
, src_mem
, len_rtx
;
2960 tree result
= fold_builtin_mempcpy (arglist
, type
, endp
);
2963 return expand_expr (result
, target
, mode
, EXPAND_NORMAL
);
2965 /* If either SRC or DEST is not a pointer type, don't do this
2966 operation in-line. */
2967 if (dest_align
== 0 || src_align
== 0)
2970 /* If LEN is not constant, call the normal function. */
2971 if (! host_integerp (len
, 1))
2974 len_rtx
= expand_expr (len
, NULL_RTX
, VOIDmode
, 0);
2975 src_str
= c_getstr (src
);
2977 /* If SRC is a string constant and block move would be done
2978 by pieces, we can avoid loading the string from memory
2979 and only stored the computed constants. */
2981 && GET_CODE (len_rtx
) == CONST_INT
2982 && (unsigned HOST_WIDE_INT
) INTVAL (len_rtx
) <= strlen (src_str
) + 1
2983 && can_store_by_pieces (INTVAL (len_rtx
), builtin_memcpy_read_str
,
2984 (void *) src_str
, dest_align
))
2986 dest_mem
= get_memory_rtx (dest
, len
);
2987 set_mem_align (dest_mem
, dest_align
);
2988 dest_mem
= store_by_pieces (dest_mem
, INTVAL (len_rtx
),
2989 builtin_memcpy_read_str
,
2990 (void *) src_str
, dest_align
, endp
);
2991 dest_mem
= force_operand (XEXP (dest_mem
, 0), NULL_RTX
);
2992 dest_mem
= convert_memory_address (ptr_mode
, dest_mem
);
2996 if (GET_CODE (len_rtx
) == CONST_INT
2997 && can_move_by_pieces (INTVAL (len_rtx
),
2998 MIN (dest_align
, src_align
)))
3000 dest_mem
= get_memory_rtx (dest
, len
);
3001 set_mem_align (dest_mem
, dest_align
);
3002 src_mem
= get_memory_rtx (src
, len
);
3003 set_mem_align (src_mem
, src_align
);
3004 dest_mem
= move_by_pieces (dest_mem
, src_mem
, INTVAL (len_rtx
),
3005 MIN (dest_align
, src_align
), endp
);
3006 dest_mem
= force_operand (XEXP (dest_mem
, 0), NULL_RTX
);
3007 dest_mem
= convert_memory_address (ptr_mode
, dest_mem
);
3015 /* Expand expression EXP, which is a call to the memmove builtin. Return 0
3016 if we failed; the caller should emit a normal call. */
3019 expand_builtin_memmove (tree arglist
, tree type
, rtx target
,
3020 enum machine_mode mode
, tree orig_exp
)
3022 if (!validate_arglist (arglist
,
3023 POINTER_TYPE
, POINTER_TYPE
, INTEGER_TYPE
, VOID_TYPE
))
3027 tree dest
= TREE_VALUE (arglist
);
3028 tree src
= TREE_VALUE (TREE_CHAIN (arglist
));
3029 tree len
= TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist
)));
3031 unsigned int src_align
= get_pointer_alignment (src
, BIGGEST_ALIGNMENT
);
3032 unsigned int dest_align
3033 = get_pointer_alignment (dest
, BIGGEST_ALIGNMENT
);
3034 tree result
= fold_builtin_memmove (arglist
, type
);
3037 return expand_expr (result
, target
, mode
, EXPAND_NORMAL
);
3039 /* If DEST is not a pointer type, call the normal function. */
3040 if (dest_align
== 0)
3043 /* If either SRC is not a pointer type, don't do this
3044 operation in-line. */
3048 /* If src is categorized for a readonly section we can use
3050 if (readonly_data_expr (src
))
3052 tree fn
= implicit_built_in_decls
[BUILT_IN_MEMCPY
];
3055 fn
= build_function_call_expr (fn
, arglist
);
3056 if (TREE_CODE (fn
) == CALL_EXPR
)
3057 CALL_EXPR_TAILCALL (fn
) = CALL_EXPR_TAILCALL (orig_exp
);
3058 return expand_expr (fn
, target
, mode
, EXPAND_NORMAL
);
3061 /* If length is 1 and we can expand memcpy call inline,
3062 it is ok to use memcpy as well. */
3063 if (integer_onep (len
))
3065 rtx ret
= expand_builtin_mempcpy (arglist
, type
, target
, mode
,
3071 /* Otherwise, call the normal function. */
3076 /* Expand expression EXP, which is a call to the bcopy builtin. Return 0
3077 if we failed the caller should emit a normal call. */
3080 expand_builtin_bcopy (tree exp
)
3082 tree arglist
= TREE_OPERAND (exp
, 1);
3083 tree type
= TREE_TYPE (exp
);
3084 tree src
, dest
, size
, newarglist
;
3086 if (!validate_arglist (arglist
,
3087 POINTER_TYPE
, POINTER_TYPE
, INTEGER_TYPE
, VOID_TYPE
))
3090 src
= TREE_VALUE (arglist
);
3091 dest
= TREE_VALUE (TREE_CHAIN (arglist
));
3092 size
= TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist
)));
3094 /* New argument list transforming bcopy(ptr x, ptr y, int z) to
3095 memmove(ptr y, ptr x, size_t z). This is done this way
3096 so that if it isn't expanded inline, we fallback to
3097 calling bcopy instead of memmove. */
3099 newarglist
= build_tree_list (NULL_TREE
, fold_convert (sizetype
, size
));
3100 newarglist
= tree_cons (NULL_TREE
, src
, newarglist
);
3101 newarglist
= tree_cons (NULL_TREE
, dest
, newarglist
);
3103 return expand_builtin_memmove (newarglist
, type
, const0_rtx
, VOIDmode
, exp
);
3107 # define HAVE_movstr 0
3108 # define CODE_FOR_movstr CODE_FOR_nothing
3111 /* Expand into a movstr instruction, if one is available. Return 0 if
3112 we failed, the caller should emit a normal call, otherwise try to
3113 get the result in TARGET, if convenient. If ENDP is 0 return the
3114 destination pointer, if ENDP is 1 return the end pointer ala
3115 mempcpy, and if ENDP is 2 return the end pointer minus one ala
3119 expand_movstr (tree dest
, tree src
, rtx target
, int endp
)
3125 const struct insn_data
* data
;
3130 dest_mem
= get_memory_rtx (dest
, NULL
);
3131 src_mem
= get_memory_rtx (src
, NULL
);
3134 target
= force_reg (Pmode
, XEXP (dest_mem
, 0));
3135 dest_mem
= replace_equiv_address (dest_mem
, target
);
3136 end
= gen_reg_rtx (Pmode
);
3140 if (target
== 0 || target
== const0_rtx
)
3142 end
= gen_reg_rtx (Pmode
);
3150 data
= insn_data
+ CODE_FOR_movstr
;
3152 if (data
->operand
[0].mode
!= VOIDmode
)
3153 end
= gen_lowpart (data
->operand
[0].mode
, end
);
3155 insn
= data
->genfun (end
, dest_mem
, src_mem
);
3161 /* movstr is supposed to set end to the address of the NUL
3162 terminator. If the caller requested a mempcpy-like return value,
3164 if (endp
== 1 && target
!= const0_rtx
)
3166 rtx tem
= plus_constant (gen_lowpart (GET_MODE (target
), end
), 1);
3167 emit_move_insn (target
, force_operand (tem
, NULL_RTX
));
3173 /* Expand expression EXP, which is a call to the strcpy builtin. Return 0
3174 if we failed the caller should emit a normal call, otherwise try to get
3175 the result in TARGET, if convenient (and in mode MODE if that's
3179 expand_builtin_strcpy (tree fndecl
, tree arglist
, rtx target
, enum machine_mode mode
)
3181 if (validate_arglist (arglist
, POINTER_TYPE
, POINTER_TYPE
, VOID_TYPE
))
3183 tree result
= fold_builtin_strcpy (fndecl
, arglist
, 0);
3185 return expand_expr (result
, target
, mode
, EXPAND_NORMAL
);
3187 return expand_movstr (TREE_VALUE (arglist
),
3188 TREE_VALUE (TREE_CHAIN (arglist
)),
3189 target
, /*endp=*/0);
3194 /* Expand a call to the stpcpy builtin, with arguments in ARGLIST.
3195 Return 0 if we failed the caller should emit a normal call,
3196 otherwise try to get the result in TARGET, if convenient (and in
3197 mode MODE if that's convenient). */
3200 expand_builtin_stpcpy (tree exp
, rtx target
, enum machine_mode mode
)
3202 tree arglist
= TREE_OPERAND (exp
, 1);
3203 /* If return value is ignored, transform stpcpy into strcpy. */
3204 if (target
== const0_rtx
)
3206 tree fn
= implicit_built_in_decls
[BUILT_IN_STRCPY
];
3210 return expand_expr (build_function_call_expr (fn
, arglist
),
3211 target
, mode
, EXPAND_NORMAL
);
3214 if (!validate_arglist (arglist
, POINTER_TYPE
, POINTER_TYPE
, VOID_TYPE
))
3218 tree dst
, src
, len
, lenp1
;
3222 /* Ensure we get an actual string whose length can be evaluated at
3223 compile-time, not an expression containing a string. This is
3224 because the latter will potentially produce pessimized code
3225 when used to produce the return value. */
3226 src
= TREE_VALUE (TREE_CHAIN (arglist
));
3227 if (! c_getstr (src
) || ! (len
= c_strlen (src
, 0)))
3228 return expand_movstr (TREE_VALUE (arglist
),
3229 TREE_VALUE (TREE_CHAIN (arglist
)),
3230 target
, /*endp=*/2);
3232 dst
= TREE_VALUE (arglist
);
3233 lenp1
= size_binop (PLUS_EXPR
, len
, ssize_int (1));
3234 narglist
= build_tree_list (NULL_TREE
, lenp1
);
3235 narglist
= tree_cons (NULL_TREE
, src
, narglist
);
3236 narglist
= tree_cons (NULL_TREE
, dst
, narglist
);
3237 ret
= expand_builtin_mempcpy (narglist
, TREE_TYPE (exp
),
3238 target
, mode
, /*endp=*/2);
3243 if (TREE_CODE (len
) == INTEGER_CST
)
3245 rtx len_rtx
= expand_expr (len
, NULL_RTX
, VOIDmode
, 0);
3247 if (GET_CODE (len_rtx
) == CONST_INT
)
3249 ret
= expand_builtin_strcpy (get_callee_fndecl (exp
),
3250 arglist
, target
, mode
);
3256 if (mode
!= VOIDmode
)
3257 target
= gen_reg_rtx (mode
);
3259 target
= gen_reg_rtx (GET_MODE (ret
));
3261 if (GET_MODE (target
) != GET_MODE (ret
))
3262 ret
= gen_lowpart (GET_MODE (target
), ret
);
3264 ret
= plus_constant (ret
, INTVAL (len_rtx
));
3265 ret
= emit_move_insn (target
, force_operand (ret
, NULL_RTX
));
3273 return expand_movstr (TREE_VALUE (arglist
),
3274 TREE_VALUE (TREE_CHAIN (arglist
)),
3275 target
, /*endp=*/2);
3279 /* Callback routine for store_by_pieces. Read GET_MODE_BITSIZE (MODE)
3280 bytes from constant string DATA + OFFSET and return it as target
3284 builtin_strncpy_read_str (void *data
, HOST_WIDE_INT offset
,
3285 enum machine_mode mode
)
3287 const char *str
= (const char *) data
;
3289 if ((unsigned HOST_WIDE_INT
) offset
> strlen (str
))
3292 return c_readstr (str
+ offset
, mode
);
3295 /* Expand expression EXP, which is a call to the strncpy builtin. Return 0
3296 if we failed the caller should emit a normal call. */
3299 expand_builtin_strncpy (tree exp
, rtx target
, enum machine_mode mode
)
3301 tree fndecl
= get_callee_fndecl (exp
);
3302 tree arglist
= TREE_OPERAND (exp
, 1);
3303 if (validate_arglist (arglist
,
3304 POINTER_TYPE
, POINTER_TYPE
, INTEGER_TYPE
, VOID_TYPE
))
3306 tree slen
= c_strlen (TREE_VALUE (TREE_CHAIN (arglist
)), 1);
3307 tree len
= TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist
)));
3308 tree result
= fold_builtin_strncpy (fndecl
, arglist
, slen
);
3311 return expand_expr (result
, target
, mode
, EXPAND_NORMAL
);
3313 /* We must be passed a constant len and src parameter. */
3314 if (!host_integerp (len
, 1) || !slen
|| !host_integerp (slen
, 1))
3317 slen
= size_binop (PLUS_EXPR
, slen
, ssize_int (1));
3319 /* We're required to pad with trailing zeros if the requested
3320 len is greater than strlen(s2)+1. In that case try to
3321 use store_by_pieces, if it fails, punt. */
3322 if (tree_int_cst_lt (slen
, len
))
3324 tree dest
= TREE_VALUE (arglist
);
3325 unsigned int dest_align
3326 = get_pointer_alignment (dest
, BIGGEST_ALIGNMENT
);
3327 const char *p
= c_getstr (TREE_VALUE (TREE_CHAIN (arglist
)));
3330 if (!p
|| dest_align
== 0 || !host_integerp (len
, 1)
3331 || !can_store_by_pieces (tree_low_cst (len
, 1),
3332 builtin_strncpy_read_str
,
3333 (void *) p
, dest_align
))
3336 dest_mem
= get_memory_rtx (dest
, len
);
3337 store_by_pieces (dest_mem
, tree_low_cst (len
, 1),
3338 builtin_strncpy_read_str
,
3339 (void *) p
, dest_align
, 0);
3340 dest_mem
= force_operand (XEXP (dest_mem
, 0), NULL_RTX
);
3341 dest_mem
= convert_memory_address (ptr_mode
, dest_mem
);
3348 /* Callback routine for store_by_pieces. Read GET_MODE_BITSIZE (MODE)
3349 bytes from constant string DATA + OFFSET and return it as target
3353 builtin_memset_read_str (void *data
, HOST_WIDE_INT offset ATTRIBUTE_UNUSED
,
3354 enum machine_mode mode
)
3356 const char *c
= (const char *) data
;
3357 char *p
= alloca (GET_MODE_SIZE (mode
));
3359 memset (p
, *c
, GET_MODE_SIZE (mode
));
3361 return c_readstr (p
, mode
);
3364 /* Callback routine for store_by_pieces. Return the RTL of a register
3365 containing GET_MODE_SIZE (MODE) consecutive copies of the unsigned
3366 char value given in the RTL register data. For example, if mode is
3367 4 bytes wide, return the RTL for 0x01010101*data. */
3370 builtin_memset_gen_str (void *data
, HOST_WIDE_INT offset ATTRIBUTE_UNUSED
,
3371 enum machine_mode mode
)
3377 size
= GET_MODE_SIZE (mode
);
3382 memset (p
, 1, size
);
3383 coeff
= c_readstr (p
, mode
);
3385 target
= convert_to_mode (mode
, (rtx
) data
, 1);
3386 target
= expand_mult (mode
, target
, coeff
, NULL_RTX
, 1);
3387 return force_reg (mode
, target
);
3390 /* Expand expression EXP, which is a call to the memset builtin. Return 0
3391 if we failed the caller should emit a normal call, otherwise try to get
3392 the result in TARGET, if convenient (and in mode MODE if that's
3396 expand_builtin_memset (tree arglist
, rtx target
, enum machine_mode mode
,
3399 if (!validate_arglist (arglist
,
3400 POINTER_TYPE
, INTEGER_TYPE
, INTEGER_TYPE
, VOID_TYPE
))
3404 tree dest
= TREE_VALUE (arglist
);
3405 tree val
= TREE_VALUE (TREE_CHAIN (arglist
));
3406 tree len
= TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist
)));
3409 unsigned int dest_align
3410 = get_pointer_alignment (dest
, BIGGEST_ALIGNMENT
);
3411 rtx dest_mem
, dest_addr
, len_rtx
;
3413 /* If DEST is not a pointer type, don't do this
3414 operation in-line. */
3415 if (dest_align
== 0)
3418 /* If the LEN parameter is zero, return DEST. */
3419 if (integer_zerop (len
))
3421 /* Evaluate and ignore VAL in case it has side-effects. */
3422 expand_expr (val
, const0_rtx
, VOIDmode
, EXPAND_NORMAL
);
3423 return expand_expr (dest
, target
, mode
, EXPAND_NORMAL
);
3426 len_rtx
= expand_expr (len
, NULL_RTX
, VOIDmode
, 0);
3427 dest_mem
= get_memory_rtx (dest
, len
);
3429 if (TREE_CODE (val
) != INTEGER_CST
)
3433 val
= fold_build1 (CONVERT_EXPR
, unsigned_char_type_node
, val
);
3434 val_rtx
= expand_expr (val
, NULL_RTX
, VOIDmode
, 0);
3436 /* Assume that we can memset by pieces if we can store the
3437 * the coefficients by pieces (in the required modes).
3438 * We can't pass builtin_memset_gen_str as that emits RTL. */
3440 if (host_integerp (len
, 1)
3441 && !(optimize_size
&& tree_low_cst (len
, 1) > 1)
3442 && can_store_by_pieces (tree_low_cst (len
, 1),
3443 builtin_memset_read_str
, &c
, dest_align
))
3445 val_rtx
= force_reg (TYPE_MODE (unsigned_char_type_node
),
3447 store_by_pieces (dest_mem
, tree_low_cst (len
, 1),
3448 builtin_memset_gen_str
, val_rtx
, dest_align
, 0);
3450 else if (!set_storage_via_setmem(dest_mem
, len_rtx
, val_rtx
,
3454 dest_mem
= force_operand (XEXP (dest_mem
, 0), NULL_RTX
);
3455 dest_mem
= convert_memory_address (ptr_mode
, dest_mem
);
3459 if (target_char_cast (val
, &c
))
3464 if (host_integerp (len
, 1)
3465 && !(optimize_size
&& tree_low_cst (len
, 1) > 1)
3466 && can_store_by_pieces (tree_low_cst (len
, 1),
3467 builtin_memset_read_str
, &c
, dest_align
))
3468 store_by_pieces (dest_mem
, tree_low_cst (len
, 1),
3469 builtin_memset_read_str
, &c
, dest_align
, 0);
3470 else if (!set_storage_via_setmem (dest_mem
, len_rtx
, GEN_INT (c
),
3474 dest_mem
= force_operand (XEXP (dest_mem
, 0), NULL_RTX
);
3475 dest_mem
= convert_memory_address (ptr_mode
, dest_mem
);
3479 set_mem_align (dest_mem
, dest_align
);
3480 dest_addr
= clear_storage (dest_mem
, len_rtx
,
3481 CALL_EXPR_TAILCALL (orig_exp
)
3482 ? BLOCK_OP_TAILCALL
: BLOCK_OP_NORMAL
);
3486 dest_addr
= force_operand (XEXP (dest_mem
, 0), NULL_RTX
);
3487 dest_addr
= convert_memory_address (ptr_mode
, dest_addr
);
3494 /* Expand expression EXP, which is a call to the bzero builtin. Return 0
3495 if we failed the caller should emit a normal call. */
3498 expand_builtin_bzero (tree exp
)
3500 tree arglist
= TREE_OPERAND (exp
, 1);
3501 tree dest
, size
, newarglist
;
3503 if (!validate_arglist (arglist
, POINTER_TYPE
, INTEGER_TYPE
, VOID_TYPE
))
3506 dest
= TREE_VALUE (arglist
);
3507 size
= TREE_VALUE (TREE_CHAIN (arglist
));
3509 /* New argument list transforming bzero(ptr x, int y) to
3510 memset(ptr x, int 0, size_t y). This is done this way
3511 so that if it isn't expanded inline, we fallback to
3512 calling bzero instead of memset. */
3514 newarglist
= build_tree_list (NULL_TREE
, fold_convert (sizetype
, size
));
3515 newarglist
= tree_cons (NULL_TREE
, integer_zero_node
, newarglist
);
3516 newarglist
= tree_cons (NULL_TREE
, dest
, newarglist
);
3518 return expand_builtin_memset (newarglist
, const0_rtx
, VOIDmode
, exp
);
3521 /* Expand expression EXP, which is a call to the memcmp built-in function.
3522 ARGLIST is the argument list for this call. Return 0 if we failed and the
3523 caller should emit a normal call, otherwise try to get the result in
3524 TARGET, if convenient (and in mode MODE, if that's convenient). */
3527 expand_builtin_memcmp (tree exp ATTRIBUTE_UNUSED
, tree arglist
, rtx target
,
3528 enum machine_mode mode
)
3530 if (!validate_arglist (arglist
,
3531 POINTER_TYPE
, POINTER_TYPE
, INTEGER_TYPE
, VOID_TYPE
))
3535 tree result
= fold_builtin_memcmp (arglist
);
3537 return expand_expr (result
, target
, mode
, EXPAND_NORMAL
);
3540 #if defined HAVE_cmpmemsi || defined HAVE_cmpstrnsi
3542 tree arg1
= TREE_VALUE (arglist
);
3543 tree arg2
= TREE_VALUE (TREE_CHAIN (arglist
));
3544 tree len
= TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist
)));
3545 rtx arg1_rtx
, arg2_rtx
, arg3_rtx
;
3550 = get_pointer_alignment (arg1
, BIGGEST_ALIGNMENT
) / BITS_PER_UNIT
;
3552 = get_pointer_alignment (arg2
, BIGGEST_ALIGNMENT
) / BITS_PER_UNIT
;
3553 enum machine_mode insn_mode
;
3555 #ifdef HAVE_cmpmemsi
3557 insn_mode
= insn_data
[(int) CODE_FOR_cmpmemsi
].operand
[0].mode
;
3560 #ifdef HAVE_cmpstrnsi
3562 insn_mode
= insn_data
[(int) CODE_FOR_cmpstrnsi
].operand
[0].mode
;
3567 /* If we don't have POINTER_TYPE, call the function. */
3568 if (arg1_align
== 0 || arg2_align
== 0)
3571 /* Make a place to write the result of the instruction. */
3574 && REG_P (result
) && GET_MODE (result
) == insn_mode
3575 && REGNO (result
) >= FIRST_PSEUDO_REGISTER
))
3576 result
= gen_reg_rtx (insn_mode
);
3578 arg1_rtx
= get_memory_rtx (arg1
, len
);
3579 arg2_rtx
= get_memory_rtx (arg2
, len
);
3580 arg3_rtx
= expand_expr (len
, NULL_RTX
, VOIDmode
, 0);
3582 /* Set MEM_SIZE as appropriate. */
3583 if (GET_CODE (arg3_rtx
) == CONST_INT
)
3585 set_mem_size (arg1_rtx
, arg3_rtx
);
3586 set_mem_size (arg2_rtx
, arg3_rtx
);
3589 #ifdef HAVE_cmpmemsi
3591 insn
= gen_cmpmemsi (result
, arg1_rtx
, arg2_rtx
, arg3_rtx
,
3592 GEN_INT (MIN (arg1_align
, arg2_align
)));
3595 #ifdef HAVE_cmpstrnsi
3597 insn
= gen_cmpstrnsi (result
, arg1_rtx
, arg2_rtx
, arg3_rtx
,
3598 GEN_INT (MIN (arg1_align
, arg2_align
)));
3606 emit_library_call_value (memcmp_libfunc
, result
, LCT_PURE_MAKE_BLOCK
,
3607 TYPE_MODE (integer_type_node
), 3,
3608 XEXP (arg1_rtx
, 0), Pmode
,
3609 XEXP (arg2_rtx
, 0), Pmode
,
3610 convert_to_mode (TYPE_MODE (sizetype
), arg3_rtx
,
3611 TYPE_UNSIGNED (sizetype
)),
3612 TYPE_MODE (sizetype
));
3614 /* Return the value in the proper mode for this function. */
3615 mode
= TYPE_MODE (TREE_TYPE (exp
));
3616 if (GET_MODE (result
) == mode
)
3618 else if (target
!= 0)
3620 convert_move (target
, result
, 0);
3624 return convert_to_mode (mode
, result
, 0);
3631 /* Expand expression EXP, which is a call to the strcmp builtin. Return 0
3632 if we failed the caller should emit a normal call, otherwise try to get
3633 the result in TARGET, if convenient. */
3636 expand_builtin_strcmp (tree exp
, rtx target
, enum machine_mode mode
)
3638 tree arglist
= TREE_OPERAND (exp
, 1);
3640 if (!validate_arglist (arglist
, POINTER_TYPE
, POINTER_TYPE
, VOID_TYPE
))
3644 tree result
= fold_builtin_strcmp (arglist
);
3646 return expand_expr (result
, target
, mode
, EXPAND_NORMAL
);
3649 #if defined HAVE_cmpstrsi || defined HAVE_cmpstrnsi
3650 if (cmpstr_optab
[SImode
] != CODE_FOR_nothing
3651 || cmpstrn_optab
[SImode
] != CODE_FOR_nothing
)
3653 rtx arg1_rtx
, arg2_rtx
;
3654 rtx result
, insn
= NULL_RTX
;
3657 tree arg1
= TREE_VALUE (arglist
);
3658 tree arg2
= TREE_VALUE (TREE_CHAIN (arglist
));
3660 = get_pointer_alignment (arg1
, BIGGEST_ALIGNMENT
) / BITS_PER_UNIT
;
3662 = get_pointer_alignment (arg2
, BIGGEST_ALIGNMENT
) / BITS_PER_UNIT
;
3664 /* If we don't have POINTER_TYPE, call the function. */
3665 if (arg1_align
== 0 || arg2_align
== 0)
3668 /* Stabilize the arguments in case gen_cmpstr(n)si fail. */
3669 arg1
= builtin_save_expr (arg1
);
3670 arg2
= builtin_save_expr (arg2
);
3672 arg1_rtx
= get_memory_rtx (arg1
, NULL
);
3673 arg2_rtx
= get_memory_rtx (arg2
, NULL
);
3675 #ifdef HAVE_cmpstrsi
3676 /* Try to call cmpstrsi. */
3679 enum machine_mode insn_mode
3680 = insn_data
[(int) CODE_FOR_cmpstrsi
].operand
[0].mode
;
3682 /* Make a place to write the result of the instruction. */
3685 && REG_P (result
) && GET_MODE (result
) == insn_mode
3686 && REGNO (result
) >= FIRST_PSEUDO_REGISTER
))
3687 result
= gen_reg_rtx (insn_mode
);
3689 insn
= gen_cmpstrsi (result
, arg1_rtx
, arg2_rtx
,
3690 GEN_INT (MIN (arg1_align
, arg2_align
)));
3694 /* Try to determine at least one length and call cmpstrnsi. */
3695 if (!insn
&& HAVE_cmpstrnsi
)
3700 enum machine_mode insn_mode
3701 = insn_data
[(int) CODE_FOR_cmpstrnsi
].operand
[0].mode
;
3702 tree len1
= c_strlen (arg1
, 1);
3703 tree len2
= c_strlen (arg2
, 1);
3706 len1
= size_binop (PLUS_EXPR
, ssize_int (1), len1
);
3708 len2
= size_binop (PLUS_EXPR
, ssize_int (1), len2
);
3710 /* If we don't have a constant length for the first, use the length
3711 of the second, if we know it. We don't require a constant for
3712 this case; some cost analysis could be done if both are available
3713 but neither is constant. For now, assume they're equally cheap,
3714 unless one has side effects. If both strings have constant lengths,
3721 else if (TREE_SIDE_EFFECTS (len1
))
3723 else if (TREE_SIDE_EFFECTS (len2
))
3725 else if (TREE_CODE (len1
) != INTEGER_CST
)
3727 else if (TREE_CODE (len2
) != INTEGER_CST
)
3729 else if (tree_int_cst_lt (len1
, len2
))
3734 /* If both arguments have side effects, we cannot optimize. */
3735 if (!len
|| TREE_SIDE_EFFECTS (len
))
3738 /* Stabilize the arguments in case gen_cmpstrnsi fails. */
3739 arg3_rtx
= expand_expr (len
, NULL_RTX
, VOIDmode
, 0);
3741 /* Make a place to write the result of the instruction. */
3744 && REG_P (result
) && GET_MODE (result
) == insn_mode
3745 && REGNO (result
) >= FIRST_PSEUDO_REGISTER
))
3746 result
= gen_reg_rtx (insn_mode
);
3748 insn
= gen_cmpstrnsi (result
, arg1_rtx
, arg2_rtx
, arg3_rtx
,
3749 GEN_INT (MIN (arg1_align
, arg2_align
)));
3757 /* Return the value in the proper mode for this function. */
3758 mode
= TYPE_MODE (TREE_TYPE (exp
));
3759 if (GET_MODE (result
) == mode
)
3762 return convert_to_mode (mode
, result
, 0);
3763 convert_move (target
, result
, 0);
3767 /* Expand the library call ourselves using a stabilized argument
3768 list to avoid re-evaluating the function's arguments twice. */
3769 arglist
= build_tree_list (NULL_TREE
, arg2
);
3770 arglist
= tree_cons (NULL_TREE
, arg1
, arglist
);
3771 fndecl
= get_callee_fndecl (exp
);
3772 fn
= build_function_call_expr (fndecl
, arglist
);
3773 if (TREE_CODE (fn
) == CALL_EXPR
)
3774 CALL_EXPR_TAILCALL (fn
) = CALL_EXPR_TAILCALL (exp
);
3775 return expand_call (fn
, target
, target
== const0_rtx
);
3781 /* Expand expression EXP, which is a call to the strncmp builtin. Return 0
3782 if we failed the caller should emit a normal call, otherwise try to get
3783 the result in TARGET, if convenient. */
3786 expand_builtin_strncmp (tree exp
, rtx target
, enum machine_mode mode
)
3788 tree arglist
= TREE_OPERAND (exp
, 1);
3790 if (!validate_arglist (arglist
,
3791 POINTER_TYPE
, POINTER_TYPE
, INTEGER_TYPE
, VOID_TYPE
))
3795 tree result
= fold_builtin_strncmp (arglist
);
3797 return expand_expr (result
, target
, mode
, EXPAND_NORMAL
);
3800 /* If c_strlen can determine an expression for one of the string
3801 lengths, and it doesn't have side effects, then emit cmpstrnsi
3802 using length MIN(strlen(string)+1, arg3). */
3803 #ifdef HAVE_cmpstrnsi
3806 tree arg1
= TREE_VALUE (arglist
);
3807 tree arg2
= TREE_VALUE (TREE_CHAIN (arglist
));
3808 tree arg3
= TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist
)));
3809 tree len
, len1
, len2
;
3810 rtx arg1_rtx
, arg2_rtx
, arg3_rtx
;
3815 = get_pointer_alignment (arg1
, BIGGEST_ALIGNMENT
) / BITS_PER_UNIT
;
3817 = get_pointer_alignment (arg2
, BIGGEST_ALIGNMENT
) / BITS_PER_UNIT
;
3818 enum machine_mode insn_mode
3819 = insn_data
[(int) CODE_FOR_cmpstrnsi
].operand
[0].mode
;
3821 len1
= c_strlen (arg1
, 1);
3822 len2
= c_strlen (arg2
, 1);
3825 len1
= size_binop (PLUS_EXPR
, ssize_int (1), len1
);
3827 len2
= size_binop (PLUS_EXPR
, ssize_int (1), len2
);
3829 /* If we don't have a constant length for the first, use the length
3830 of the second, if we know it. We don't require a constant for
3831 this case; some cost analysis could be done if both are available
3832 but neither is constant. For now, assume they're equally cheap,
3833 unless one has side effects. If both strings have constant lengths,
3840 else if (TREE_SIDE_EFFECTS (len1
))
3842 else if (TREE_SIDE_EFFECTS (len2
))
3844 else if (TREE_CODE (len1
) != INTEGER_CST
)
3846 else if (TREE_CODE (len2
) != INTEGER_CST
)
3848 else if (tree_int_cst_lt (len1
, len2
))
3853 /* If both arguments have side effects, we cannot optimize. */
3854 if (!len
|| TREE_SIDE_EFFECTS (len
))
3857 /* The actual new length parameter is MIN(len,arg3). */
3858 len
= fold_build2 (MIN_EXPR
, TREE_TYPE (len
), len
,
3859 fold_convert (TREE_TYPE (len
), arg3
));
3861 /* If we don't have POINTER_TYPE, call the function. */
3862 if (arg1_align
== 0 || arg2_align
== 0)
3865 /* Make a place to write the result of the instruction. */
3868 && REG_P (result
) && GET_MODE (result
) == insn_mode
3869 && REGNO (result
) >= FIRST_PSEUDO_REGISTER
))
3870 result
= gen_reg_rtx (insn_mode
);
3872 /* Stabilize the arguments in case gen_cmpstrnsi fails. */
3873 arg1
= builtin_save_expr (arg1
);
3874 arg2
= builtin_save_expr (arg2
);
3875 len
= builtin_save_expr (len
);
3877 arg1_rtx
= get_memory_rtx (arg1
, len
);
3878 arg2_rtx
= get_memory_rtx (arg2
, len
);
3879 arg3_rtx
= expand_expr (len
, NULL_RTX
, VOIDmode
, 0);
3880 insn
= gen_cmpstrnsi (result
, arg1_rtx
, arg2_rtx
, arg3_rtx
,
3881 GEN_INT (MIN (arg1_align
, arg2_align
)));
3886 /* Return the value in the proper mode for this function. */
3887 mode
= TYPE_MODE (TREE_TYPE (exp
));
3888 if (GET_MODE (result
) == mode
)
3891 return convert_to_mode (mode
, result
, 0);
3892 convert_move (target
, result
, 0);
3896 /* Expand the library call ourselves using a stabilized argument
3897 list to avoid re-evaluating the function's arguments twice. */
3898 arglist
= build_tree_list (NULL_TREE
, len
);
3899 arglist
= tree_cons (NULL_TREE
, arg2
, arglist
);
3900 arglist
= tree_cons (NULL_TREE
, arg1
, arglist
);
3901 fndecl
= get_callee_fndecl (exp
);
3902 fn
= build_function_call_expr (fndecl
, arglist
);
3903 if (TREE_CODE (fn
) == CALL_EXPR
)
3904 CALL_EXPR_TAILCALL (fn
) = CALL_EXPR_TAILCALL (exp
);
3905 return expand_call (fn
, target
, target
== const0_rtx
);
3911 /* Expand expression EXP, which is a call to the strcat builtin.
3912 Return 0 if we failed the caller should emit a normal call,
3913 otherwise try to get the result in TARGET, if convenient. */
3916 expand_builtin_strcat (tree fndecl
, tree arglist
, rtx target
, enum machine_mode mode
)
3918 if (!validate_arglist (arglist
, POINTER_TYPE
, POINTER_TYPE
, VOID_TYPE
))
3922 tree dst
= TREE_VALUE (arglist
),
3923 src
= TREE_VALUE (TREE_CHAIN (arglist
));
3924 const char *p
= c_getstr (src
);
3926 /* If the string length is zero, return the dst parameter. */
3927 if (p
&& *p
== '\0')
3928 return expand_expr (dst
, target
, mode
, EXPAND_NORMAL
);
3932 /* See if we can store by pieces into (dst + strlen(dst)). */
3933 tree newsrc
, newdst
,
3934 strlen_fn
= implicit_built_in_decls
[BUILT_IN_STRLEN
];
3937 /* Stabilize the argument list. */
3938 newsrc
= builtin_save_expr (src
);
3940 arglist
= build_tree_list (NULL_TREE
, newsrc
);
3942 arglist
= TREE_CHAIN (arglist
); /* Reusing arglist if safe. */
3944 dst
= builtin_save_expr (dst
);
3948 /* Create strlen (dst). */
3950 build_function_call_expr (strlen_fn
,
3951 build_tree_list (NULL_TREE
, dst
));
3952 /* Create (dst + (cast) strlen (dst)). */
3953 newdst
= fold_convert (TREE_TYPE (dst
), newdst
);
3954 newdst
= fold_build2 (PLUS_EXPR
, TREE_TYPE (dst
), dst
, newdst
);
3956 newdst
= builtin_save_expr (newdst
);
3957 arglist
= tree_cons (NULL_TREE
, newdst
, arglist
);
3959 if (!expand_builtin_strcpy (fndecl
, arglist
, target
, mode
))
3961 end_sequence (); /* Stop sequence. */
3965 /* Output the entire sequence. */
3966 insns
= get_insns ();
3970 return expand_expr (dst
, target
, mode
, EXPAND_NORMAL
);
3977 /* Expand expression EXP, which is a call to the strncat builtin.
3978 Return 0 if we failed the caller should emit a normal call,
3979 otherwise try to get the result in TARGET, if convenient. */
3982 expand_builtin_strncat (tree arglist
, rtx target
, enum machine_mode mode
)
3984 if (validate_arglist (arglist
,
3985 POINTER_TYPE
, POINTER_TYPE
, INTEGER_TYPE
, VOID_TYPE
))
3987 tree result
= fold_builtin_strncat (arglist
);
3989 return expand_expr (result
, target
, mode
, EXPAND_NORMAL
);
3994 /* Expand expression EXP, which is a call to the strspn builtin.
3995 Return 0 if we failed the caller should emit a normal call,
3996 otherwise try to get the result in TARGET, if convenient. */
3999 expand_builtin_strspn (tree arglist
, rtx target
, enum machine_mode mode
)
4001 if (validate_arglist (arglist
, POINTER_TYPE
, POINTER_TYPE
, VOID_TYPE
))
4003 tree result
= fold_builtin_strspn (arglist
);
4005 return expand_expr (result
, target
, mode
, EXPAND_NORMAL
);
4010 /* Expand expression EXP, which is a call to the strcspn builtin.
4011 Return 0 if we failed the caller should emit a normal call,
4012 otherwise try to get the result in TARGET, if convenient. */
4015 expand_builtin_strcspn (tree arglist
, rtx target
, enum machine_mode mode
)
4017 if (validate_arglist (arglist
, POINTER_TYPE
, POINTER_TYPE
, VOID_TYPE
))
4019 tree result
= fold_builtin_strcspn (arglist
);
4021 return expand_expr (result
, target
, mode
, EXPAND_NORMAL
);
4026 /* Expand a call to __builtin_saveregs, generating the result in TARGET,
4027 if that's convenient. */
4030 expand_builtin_saveregs (void)
4034 /* Don't do __builtin_saveregs more than once in a function.
4035 Save the result of the first call and reuse it. */
4036 if (saveregs_value
!= 0)
4037 return saveregs_value
;
4039 /* When this function is called, it means that registers must be
4040 saved on entry to this function. So we migrate the call to the
4041 first insn of this function. */
4045 /* Do whatever the machine needs done in this case. */
4046 val
= targetm
.calls
.expand_builtin_saveregs ();
4051 saveregs_value
= val
;
4053 /* Put the insns after the NOTE that starts the function. If this
4054 is inside a start_sequence, make the outer-level insn chain current, so
4055 the code is placed at the start of the function. */
4056 push_topmost_sequence ();
4057 emit_insn_after (seq
, entry_of_function ());
4058 pop_topmost_sequence ();
4063 /* __builtin_args_info (N) returns word N of the arg space info
4064 for the current function. The number and meanings of words
4065 is controlled by the definition of CUMULATIVE_ARGS. */
4068 expand_builtin_args_info (tree arglist
)
4070 int nwords
= sizeof (CUMULATIVE_ARGS
) / sizeof (int);
4071 int *word_ptr
= (int *) ¤t_function_args_info
;
4073 gcc_assert (sizeof (CUMULATIVE_ARGS
) % sizeof (int) == 0);
4077 if (!host_integerp (TREE_VALUE (arglist
), 0))
4078 error ("argument of %<__builtin_args_info%> must be constant");
4081 HOST_WIDE_INT wordnum
= tree_low_cst (TREE_VALUE (arglist
), 0);
4083 if (wordnum
< 0 || wordnum
>= nwords
)
4084 error ("argument of %<__builtin_args_info%> out of range");
4086 return GEN_INT (word_ptr
[wordnum
]);
4090 error ("missing argument in %<__builtin_args_info%>");
4095 /* Expand a call to __builtin_next_arg. */
4098 expand_builtin_next_arg (void)
4100 /* Checking arguments is already done in fold_builtin_next_arg
4101 that must be called before this function. */
4102 return expand_binop (Pmode
, add_optab
,
4103 current_function_internal_arg_pointer
,
4104 current_function_arg_offset_rtx
,
4105 NULL_RTX
, 0, OPTAB_LIB_WIDEN
);
4108 /* Make it easier for the backends by protecting the valist argument
4109 from multiple evaluations. */
4112 stabilize_va_list (tree valist
, int needs_lvalue
)
4114 if (TREE_CODE (va_list_type_node
) == ARRAY_TYPE
)
4116 if (TREE_SIDE_EFFECTS (valist
))
4117 valist
= save_expr (valist
);
4119 /* For this case, the backends will be expecting a pointer to
4120 TREE_TYPE (va_list_type_node), but it's possible we've
4121 actually been given an array (an actual va_list_type_node).
4123 if (TREE_CODE (TREE_TYPE (valist
)) == ARRAY_TYPE
)
4125 tree p1
= build_pointer_type (TREE_TYPE (va_list_type_node
));
4126 valist
= build_fold_addr_expr_with_type (valist
, p1
);
4135 if (! TREE_SIDE_EFFECTS (valist
))
4138 pt
= build_pointer_type (va_list_type_node
);
4139 valist
= fold_build1 (ADDR_EXPR
, pt
, valist
);
4140 TREE_SIDE_EFFECTS (valist
) = 1;
4143 if (TREE_SIDE_EFFECTS (valist
))
4144 valist
= save_expr (valist
);
4145 valist
= build_fold_indirect_ref (valist
);
4151 /* The "standard" definition of va_list is void*. */
4154 std_build_builtin_va_list (void)
4156 return ptr_type_node
;
4159 /* The "standard" implementation of va_start: just assign `nextarg' to
4163 std_expand_builtin_va_start (tree valist
, rtx nextarg
)
4167 t
= build2 (MODIFY_EXPR
, TREE_TYPE (valist
), valist
,
4168 make_tree (ptr_type_node
, nextarg
));
4169 TREE_SIDE_EFFECTS (t
) = 1;
4171 expand_expr (t
, const0_rtx
, VOIDmode
, EXPAND_NORMAL
);
4174 /* Expand ARGLIST, from a call to __builtin_va_start. */
4177 expand_builtin_va_start (tree arglist
)
4182 chain
= TREE_CHAIN (arglist
);
4186 error ("too few arguments to function %<va_start%>");
4190 if (fold_builtin_next_arg (chain
))
4193 nextarg
= expand_builtin_next_arg ();
4194 valist
= stabilize_va_list (TREE_VALUE (arglist
), 1);
4196 #ifdef EXPAND_BUILTIN_VA_START
4197 EXPAND_BUILTIN_VA_START (valist
, nextarg
);
4199 std_expand_builtin_va_start (valist
, nextarg
);
4205 /* The "standard" implementation of va_arg: read the value from the
4206 current (padded) address and increment by the (padded) size. */
4209 std_gimplify_va_arg_expr (tree valist
, tree type
, tree
*pre_p
, tree
*post_p
)
4211 tree addr
, t
, type_size
, rounded_size
, valist_tmp
;
4212 unsigned HOST_WIDE_INT align
, boundary
;
4215 #ifdef ARGS_GROW_DOWNWARD
4216 /* All of the alignment and movement below is for args-grow-up machines.
4217 As of 2004, there are only 3 ARGS_GROW_DOWNWARD targets, and they all
4218 implement their own specialized gimplify_va_arg_expr routines. */
4222 indirect
= pass_by_reference (NULL
, TYPE_MODE (type
), type
, false);
4224 type
= build_pointer_type (type
);
4226 align
= PARM_BOUNDARY
/ BITS_PER_UNIT
;
4227 boundary
= FUNCTION_ARG_BOUNDARY (TYPE_MODE (type
), type
) / BITS_PER_UNIT
;
4229 /* Hoist the valist value into a temporary for the moment. */
4230 valist_tmp
= get_initialized_tmp_var (valist
, pre_p
, NULL
);
4232 /* va_list pointer is aligned to PARM_BOUNDARY. If argument actually
4233 requires greater alignment, we must perform dynamic alignment. */
4234 if (boundary
> align
)
4236 t
= fold_convert (TREE_TYPE (valist
), size_int (boundary
- 1));
4237 t
= build2 (MODIFY_EXPR
, TREE_TYPE (valist
), valist_tmp
,
4238 build2 (PLUS_EXPR
, TREE_TYPE (valist
), valist_tmp
, t
));
4239 gimplify_and_add (t
, pre_p
);
4241 t
= fold_convert (TREE_TYPE (valist
), size_int (-boundary
));
4242 t
= build2 (MODIFY_EXPR
, TREE_TYPE (valist
), valist_tmp
,
4243 build2 (BIT_AND_EXPR
, TREE_TYPE (valist
), valist_tmp
, t
));
4244 gimplify_and_add (t
, pre_p
);
4249 /* If the actual alignment is less than the alignment of the type,
4250 adjust the type accordingly so that we don't assume strict alignment
4251 when deferencing the pointer. */
4252 boundary
*= BITS_PER_UNIT
;
4253 if (boundary
< TYPE_ALIGN (type
))
4255 type
= build_variant_type_copy (type
);
4256 TYPE_ALIGN (type
) = boundary
;
4259 /* Compute the rounded size of the type. */
4260 type_size
= size_in_bytes (type
);
4261 rounded_size
= round_up (type_size
, align
);
4263 /* Reduce rounded_size so it's sharable with the postqueue. */
4264 gimplify_expr (&rounded_size
, pre_p
, post_p
, is_gimple_val
, fb_rvalue
);
4268 if (PAD_VARARGS_DOWN
&& !integer_zerop (rounded_size
))
4270 /* Small args are padded downward. */
4271 t
= fold_build2 (GT_EXPR
, sizetype
, rounded_size
, size_int (align
));
4272 t
= fold_build3 (COND_EXPR
, sizetype
, t
, size_zero_node
,
4273 size_binop (MINUS_EXPR
, rounded_size
, type_size
));
4274 t
= fold_convert (TREE_TYPE (addr
), t
);
4275 addr
= fold_build2 (PLUS_EXPR
, TREE_TYPE (addr
), addr
, t
);
4278 /* Compute new value for AP. */
4279 t
= fold_convert (TREE_TYPE (valist
), rounded_size
);
4280 t
= build2 (PLUS_EXPR
, TREE_TYPE (valist
), valist_tmp
, t
);
4281 t
= build2 (MODIFY_EXPR
, TREE_TYPE (valist
), valist
, t
);
4282 gimplify_and_add (t
, pre_p
);
4284 addr
= fold_convert (build_pointer_type (type
), addr
);
4287 addr
= build_va_arg_indirect_ref (addr
);
4289 return build_va_arg_indirect_ref (addr
);
4292 /* Build an indirect-ref expression over the given TREE, which represents a
4293 piece of a va_arg() expansion. */
4295 build_va_arg_indirect_ref (tree addr
)
4297 addr
= build_fold_indirect_ref (addr
);
4299 if (flag_mudflap
) /* Don't instrument va_arg INDIRECT_REF. */
4305 /* Return a dummy expression of type TYPE in order to keep going after an
4309 dummy_object (tree type
)
4311 tree t
= convert (build_pointer_type (type
), null_pointer_node
);
4312 return build1 (INDIRECT_REF
, type
, t
);
4315 /* Gimplify __builtin_va_arg, aka VA_ARG_EXPR, which is not really a
4316 builtin function, but a very special sort of operator. */
4318 enum gimplify_status
4319 gimplify_va_arg_expr (tree
*expr_p
, tree
*pre_p
, tree
*post_p
)
4321 tree promoted_type
, want_va_type
, have_va_type
;
4322 tree valist
= TREE_OPERAND (*expr_p
, 0);
4323 tree type
= TREE_TYPE (*expr_p
);
4326 /* Verify that valist is of the proper type. */
4327 want_va_type
= va_list_type_node
;
4328 have_va_type
= TREE_TYPE (valist
);
4330 if (have_va_type
== error_mark_node
)
4333 if (TREE_CODE (want_va_type
) == ARRAY_TYPE
)
4335 /* If va_list is an array type, the argument may have decayed
4336 to a pointer type, e.g. by being passed to another function.
4337 In that case, unwrap both types so that we can compare the
4338 underlying records. */
4339 if (TREE_CODE (have_va_type
) == ARRAY_TYPE
4340 || POINTER_TYPE_P (have_va_type
))
4342 want_va_type
= TREE_TYPE (want_va_type
);
4343 have_va_type
= TREE_TYPE (have_va_type
);
4347 if (TYPE_MAIN_VARIANT (want_va_type
) != TYPE_MAIN_VARIANT (have_va_type
))
4349 error ("first argument to %<va_arg%> not of type %<va_list%>");
4353 /* Generate a diagnostic for requesting data of a type that cannot
4354 be passed through `...' due to type promotion at the call site. */
4355 else if ((promoted_type
= lang_hooks
.types
.type_promotes_to (type
))
4358 static bool gave_help
;
4360 /* Unfortunately, this is merely undefined, rather than a constraint
4361 violation, so we cannot make this an error. If this call is never
4362 executed, the program is still strictly conforming. */
4363 warning (0, "%qT is promoted to %qT when passed through %<...%>",
4364 type
, promoted_type
);
4368 warning (0, "(so you should pass %qT not %qT to %<va_arg%>)",
4369 promoted_type
, type
);
4372 /* We can, however, treat "undefined" any way we please.
4373 Call abort to encourage the user to fix the program. */
4374 inform ("if this code is reached, the program will abort");
4375 t
= build_function_call_expr (implicit_built_in_decls
[BUILT_IN_TRAP
],
4377 append_to_statement_list (t
, pre_p
);
4379 /* This is dead code, but go ahead and finish so that the
4380 mode of the result comes out right. */
4381 *expr_p
= dummy_object (type
);
4386 /* Make it easier for the backends by protecting the valist argument
4387 from multiple evaluations. */
4388 if (TREE_CODE (va_list_type_node
) == ARRAY_TYPE
)
4390 /* For this case, the backends will be expecting a pointer to
4391 TREE_TYPE (va_list_type_node), but it's possible we've
4392 actually been given an array (an actual va_list_type_node).
4394 if (TREE_CODE (TREE_TYPE (valist
)) == ARRAY_TYPE
)
4396 tree p1
= build_pointer_type (TREE_TYPE (va_list_type_node
));
4397 valist
= build_fold_addr_expr_with_type (valist
, p1
);
4399 gimplify_expr (&valist
, pre_p
, post_p
, is_gimple_val
, fb_rvalue
);
4402 gimplify_expr (&valist
, pre_p
, post_p
, is_gimple_min_lval
, fb_lvalue
);
4404 if (!targetm
.gimplify_va_arg_expr
)
4405 /* FIXME:Once most targets are converted we should merely
4406 assert this is non-null. */
4409 *expr_p
= targetm
.gimplify_va_arg_expr (valist
, type
, pre_p
, post_p
);
4414 /* Expand ARGLIST, from a call to __builtin_va_end. */
4417 expand_builtin_va_end (tree arglist
)
4419 tree valist
= TREE_VALUE (arglist
);
4421 /* Evaluate for side effects, if needed. I hate macros that don't
4423 if (TREE_SIDE_EFFECTS (valist
))
4424 expand_expr (valist
, const0_rtx
, VOIDmode
, EXPAND_NORMAL
);
4429 /* Expand ARGLIST, from a call to __builtin_va_copy. We do this as a
4430 builtin rather than just as an assignment in stdarg.h because of the
4431 nastiness of array-type va_list types. */
4434 expand_builtin_va_copy (tree arglist
)
4438 dst
= TREE_VALUE (arglist
);
4439 src
= TREE_VALUE (TREE_CHAIN (arglist
));
4441 dst
= stabilize_va_list (dst
, 1);
4442 src
= stabilize_va_list (src
, 0);
4444 if (TREE_CODE (va_list_type_node
) != ARRAY_TYPE
)
4446 t
= build2 (MODIFY_EXPR
, va_list_type_node
, dst
, src
);
4447 TREE_SIDE_EFFECTS (t
) = 1;
4448 expand_expr (t
, const0_rtx
, VOIDmode
, EXPAND_NORMAL
);
4452 rtx dstb
, srcb
, size
;
4454 /* Evaluate to pointers. */
4455 dstb
= expand_expr (dst
, NULL_RTX
, Pmode
, EXPAND_NORMAL
);
4456 srcb
= expand_expr (src
, NULL_RTX
, Pmode
, EXPAND_NORMAL
);
4457 size
= expand_expr (TYPE_SIZE_UNIT (va_list_type_node
), NULL_RTX
,
4458 VOIDmode
, EXPAND_NORMAL
);
4460 dstb
= convert_memory_address (Pmode
, dstb
);
4461 srcb
= convert_memory_address (Pmode
, srcb
);
4463 /* "Dereference" to BLKmode memories. */
4464 dstb
= gen_rtx_MEM (BLKmode
, dstb
);
4465 set_mem_alias_set (dstb
, get_alias_set (TREE_TYPE (TREE_TYPE (dst
))));
4466 set_mem_align (dstb
, TYPE_ALIGN (va_list_type_node
));
4467 srcb
= gen_rtx_MEM (BLKmode
, srcb
);
4468 set_mem_alias_set (srcb
, get_alias_set (TREE_TYPE (TREE_TYPE (src
))));
4469 set_mem_align (srcb
, TYPE_ALIGN (va_list_type_node
));
4472 emit_block_move (dstb
, srcb
, size
, BLOCK_OP_NORMAL
);
4478 /* Expand a call to one of the builtin functions __builtin_frame_address or
4479 __builtin_return_address. */
4482 expand_builtin_frame_address (tree fndecl
, tree arglist
)
4484 /* The argument must be a nonnegative integer constant.
4485 It counts the number of frames to scan up the stack.
4486 The value is the return address saved in that frame. */
4488 /* Warning about missing arg was already issued. */
4490 else if (! host_integerp (TREE_VALUE (arglist
), 1))
4492 if (DECL_FUNCTION_CODE (fndecl
) == BUILT_IN_FRAME_ADDRESS
)
4493 error ("invalid argument to %<__builtin_frame_address%>");
4495 error ("invalid argument to %<__builtin_return_address%>");
4501 = expand_builtin_return_addr (DECL_FUNCTION_CODE (fndecl
),
4502 tree_low_cst (TREE_VALUE (arglist
), 1));
4504 /* Some ports cannot access arbitrary stack frames. */
4507 if (DECL_FUNCTION_CODE (fndecl
) == BUILT_IN_FRAME_ADDRESS
)
4508 warning (0, "unsupported argument to %<__builtin_frame_address%>");
4510 warning (0, "unsupported argument to %<__builtin_return_address%>");
4514 /* For __builtin_frame_address, return what we've got. */
4515 if (DECL_FUNCTION_CODE (fndecl
) == BUILT_IN_FRAME_ADDRESS
)
4519 && ! CONSTANT_P (tem
))
4520 tem
= copy_to_mode_reg (Pmode
, tem
);
4525 /* Expand a call to the alloca builtin, with arguments ARGLIST. Return 0 if
4526 we failed and the caller should emit a normal call, otherwise try to get
4527 the result in TARGET, if convenient. */
4530 expand_builtin_alloca (tree arglist
, rtx target
)
4535 /* In -fmudflap-instrumented code, alloca() and __builtin_alloca()
4536 should always expand to function calls. These can be intercepted
4541 if (!validate_arglist (arglist
, INTEGER_TYPE
, VOID_TYPE
))
4544 /* Compute the argument. */
4545 op0
= expand_expr (TREE_VALUE (arglist
), NULL_RTX
, VOIDmode
, 0);
4547 /* Allocate the desired space. */
4548 result
= allocate_dynamic_stack_space (op0
, target
, BITS_PER_UNIT
);
4549 result
= convert_memory_address (ptr_mode
, result
);
4554 /* Expand a call to a unary builtin. The arguments are in ARGLIST.
4555 Return 0 if a normal call should be emitted rather than expanding the
4556 function in-line. If convenient, the result should be placed in TARGET.
4557 SUBTARGET may be used as the target for computing one of EXP's operands. */
4560 expand_builtin_unop (enum machine_mode target_mode
, tree arglist
, rtx target
,
4561 rtx subtarget
, optab op_optab
)
4564 if (!validate_arglist (arglist
, INTEGER_TYPE
, VOID_TYPE
))
4567 /* Compute the argument. */
4568 op0
= expand_expr (TREE_VALUE (arglist
), subtarget
, VOIDmode
, 0);
4569 /* Compute op, into TARGET if possible.
4570 Set TARGET to wherever the result comes back. */
4571 target
= expand_unop (TYPE_MODE (TREE_TYPE (TREE_VALUE (arglist
))),
4572 op_optab
, op0
, target
, 1);
4573 gcc_assert (target
);
4575 return convert_to_mode (target_mode
, target
, 0);
4578 /* If the string passed to fputs is a constant and is one character
4579 long, we attempt to transform this call into __builtin_fputc(). */
4582 expand_builtin_fputs (tree arglist
, rtx target
, bool unlocked
)
4584 /* Verify the arguments in the original call. */
4585 if (validate_arglist (arglist
, POINTER_TYPE
, POINTER_TYPE
, VOID_TYPE
))
4587 tree result
= fold_builtin_fputs (arglist
, (target
== const0_rtx
),
4588 unlocked
, NULL_TREE
);
4590 return expand_expr (result
, target
, VOIDmode
, EXPAND_NORMAL
);
4595 /* Expand a call to __builtin_expect. We return our argument and emit a
4596 NOTE_INSN_EXPECTED_VALUE note. This is the expansion of __builtin_expect in
4597 a non-jump context. */
4600 expand_builtin_expect (tree arglist
, rtx target
)
4605 if (arglist
== NULL_TREE
4606 || TREE_CHAIN (arglist
) == NULL_TREE
)
4608 exp
= TREE_VALUE (arglist
);
4609 c
= TREE_VALUE (TREE_CHAIN (arglist
));
4611 if (TREE_CODE (c
) != INTEGER_CST
)
4613 error ("second argument to %<__builtin_expect%> must be a constant");
4614 c
= integer_zero_node
;
4617 target
= expand_expr (exp
, target
, VOIDmode
, EXPAND_NORMAL
);
4619 /* Don't bother with expected value notes for integral constants. */
4620 if (flag_guess_branch_prob
&& GET_CODE (target
) != CONST_INT
)
4622 /* We do need to force this into a register so that we can be
4623 moderately sure to be able to correctly interpret the branch
4625 target
= force_reg (GET_MODE (target
), target
);
4627 rtx_c
= expand_expr (c
, NULL_RTX
, GET_MODE (target
), EXPAND_NORMAL
);
4629 note
= emit_note (NOTE_INSN_EXPECTED_VALUE
);
4630 NOTE_EXPECTED_VALUE (note
) = gen_rtx_EQ (VOIDmode
, target
, rtx_c
);
4636 /* Like expand_builtin_expect, except do this in a jump context. This is
4637 called from do_jump if the conditional is a __builtin_expect. Return either
4638 a list of insns to emit the jump or NULL if we cannot optimize
4639 __builtin_expect. We need to optimize this at jump time so that machines
4640 like the PowerPC don't turn the test into a SCC operation, and then jump
4641 based on the test being 0/1. */
4644 expand_builtin_expect_jump (tree exp
, rtx if_false_label
, rtx if_true_label
)
4646 tree arglist
= TREE_OPERAND (exp
, 1);
4647 tree arg0
= TREE_VALUE (arglist
);
4648 tree arg1
= TREE_VALUE (TREE_CHAIN (arglist
));
4651 /* Only handle __builtin_expect (test, 0) and
4652 __builtin_expect (test, 1). */
4653 if (TREE_CODE (TREE_TYPE (arg1
)) == INTEGER_TYPE
4654 && (integer_zerop (arg1
) || integer_onep (arg1
)))
4656 rtx insn
, drop_through_label
, temp
;
4658 /* Expand the jump insns. */
4660 do_jump (arg0
, if_false_label
, if_true_label
);
4663 drop_through_label
= get_last_insn ();
4664 if (drop_through_label
&& NOTE_P (drop_through_label
))
4665 drop_through_label
= prev_nonnote_insn (drop_through_label
);
4666 if (drop_through_label
&& !LABEL_P (drop_through_label
))
4667 drop_through_label
= NULL_RTX
;
4670 if (! if_true_label
)
4671 if_true_label
= drop_through_label
;
4672 if (! if_false_label
)
4673 if_false_label
= drop_through_label
;
4675 /* Go through and add the expect's to each of the conditional jumps. */
4677 while (insn
!= NULL_RTX
)
4679 rtx next
= NEXT_INSN (insn
);
4681 if (JUMP_P (insn
) && any_condjump_p (insn
))
4683 rtx ifelse
= SET_SRC (pc_set (insn
));
4684 rtx then_dest
= XEXP (ifelse
, 1);
4685 rtx else_dest
= XEXP (ifelse
, 2);
4688 /* First check if we recognize any of the labels. */
4689 if (GET_CODE (then_dest
) == LABEL_REF
4690 && XEXP (then_dest
, 0) == if_true_label
)
4692 else if (GET_CODE (then_dest
) == LABEL_REF
4693 && XEXP (then_dest
, 0) == if_false_label
)
4695 else if (GET_CODE (else_dest
) == LABEL_REF
4696 && XEXP (else_dest
, 0) == if_false_label
)
4698 else if (GET_CODE (else_dest
) == LABEL_REF
4699 && XEXP (else_dest
, 0) == if_true_label
)
4701 /* Otherwise check where we drop through. */
4702 else if (else_dest
== pc_rtx
)
4704 if (next
&& NOTE_P (next
))
4705 next
= next_nonnote_insn (next
);
4707 if (next
&& JUMP_P (next
)
4708 && any_uncondjump_p (next
))
4709 temp
= XEXP (SET_SRC (pc_set (next
)), 0);
4713 /* TEMP is either a CODE_LABEL, NULL_RTX or something
4714 else that can't possibly match either target label. */
4715 if (temp
== if_false_label
)
4717 else if (temp
== if_true_label
)
4720 else if (then_dest
== pc_rtx
)
4722 if (next
&& NOTE_P (next
))
4723 next
= next_nonnote_insn (next
);
4725 if (next
&& JUMP_P (next
)
4726 && any_uncondjump_p (next
))
4727 temp
= XEXP (SET_SRC (pc_set (next
)), 0);
4731 if (temp
== if_false_label
)
4733 else if (temp
== if_true_label
)
4739 /* If the test is expected to fail, reverse the
4741 if (integer_zerop (arg1
))
4743 predict_insn_def (insn
, PRED_BUILTIN_EXPECT
, taken
);
4755 expand_builtin_trap (void)
4759 emit_insn (gen_trap ());
4762 emit_library_call (abort_libfunc
, LCT_NORETURN
, VOIDmode
, 0);
4766 /* Expand a call to fabs, fabsf or fabsl with arguments ARGLIST.
4767 Return 0 if a normal call should be emitted rather than expanding
4768 the function inline. If convenient, the result should be placed
4769 in TARGET. SUBTARGET may be used as the target for computing
4773 expand_builtin_fabs (tree arglist
, rtx target
, rtx subtarget
)
4775 enum machine_mode mode
;
4779 if (!validate_arglist (arglist
, REAL_TYPE
, VOID_TYPE
))
4782 arg
= TREE_VALUE (arglist
);
4783 mode
= TYPE_MODE (TREE_TYPE (arg
));
4784 op0
= expand_expr (arg
, subtarget
, VOIDmode
, 0);
4785 return expand_abs (mode
, op0
, target
, 0, safe_from_p (target
, arg
, 1));
4788 /* Expand a call to copysign, copysignf, or copysignl with arguments ARGLIST.
4789 Return NULL is a normal call should be emitted rather than expanding the
4790 function inline. If convenient, the result should be placed in TARGET.
4791 SUBTARGET may be used as the target for computing the operand. */
4794 expand_builtin_copysign (tree arglist
, rtx target
, rtx subtarget
)
4799 if (!validate_arglist (arglist
, REAL_TYPE
, REAL_TYPE
, VOID_TYPE
))
4802 arg
= TREE_VALUE (arglist
);
4803 op0
= expand_expr (arg
, subtarget
, VOIDmode
, 0);
4805 arg
= TREE_VALUE (TREE_CHAIN (arglist
));
4806 op1
= expand_expr (arg
, NULL
, VOIDmode
, 0);
4808 return expand_copysign (op0
, op1
, target
);
4811 /* Create a new constant string literal and return a char* pointer to it.
4812 The STRING_CST value is the LEN characters at STR. */
4814 build_string_literal (int len
, const char *str
)
4816 tree t
, elem
, index
, type
;
4818 t
= build_string (len
, str
);
4819 elem
= build_type_variant (char_type_node
, 1, 0);
4820 index
= build_index_type (build_int_cst (NULL_TREE
, len
- 1));
4821 type
= build_array_type (elem
, index
);
4822 TREE_TYPE (t
) = type
;
4823 TREE_CONSTANT (t
) = 1;
4824 TREE_INVARIANT (t
) = 1;
4825 TREE_READONLY (t
) = 1;
4826 TREE_STATIC (t
) = 1;
4828 type
= build_pointer_type (type
);
4829 t
= build1 (ADDR_EXPR
, type
, t
);
4831 type
= build_pointer_type (elem
);
4832 t
= build1 (NOP_EXPR
, type
, t
);
4836 /* Expand EXP, a call to printf or printf_unlocked.
4837 Return 0 if a normal call should be emitted rather than transforming
4838 the function inline. If convenient, the result should be placed in
4839 TARGET with mode MODE. UNLOCKED indicates this is a printf_unlocked
4842 expand_builtin_printf (tree exp
, rtx target
, enum machine_mode mode
,
4845 tree arglist
= TREE_OPERAND (exp
, 1);
4846 tree fn_putchar
= unlocked
4847 ? implicit_built_in_decls
[BUILT_IN_PUTCHAR_UNLOCKED
]
4848 : implicit_built_in_decls
[BUILT_IN_PUTCHAR
];
4849 tree fn_puts
= unlocked
? implicit_built_in_decls
[BUILT_IN_PUTS_UNLOCKED
]
4850 : implicit_built_in_decls
[BUILT_IN_PUTS
];
4851 const char *fmt_str
;
4854 /* If the return value is used, don't do the transformation. */
4855 if (target
!= const0_rtx
)
4858 /* Verify the required arguments in the original call. */
4861 fmt
= TREE_VALUE (arglist
);
4862 if (! POINTER_TYPE_P (TREE_TYPE (fmt
)))
4864 arglist
= TREE_CHAIN (arglist
);
4866 /* Check whether the format is a literal string constant. */
4867 fmt_str
= c_getstr (fmt
);
4868 if (fmt_str
== NULL
)
4871 /* If the format specifier was "%s\n", call __builtin_puts(arg). */
4872 if (strcmp (fmt_str
, "%s\n") == 0)
4875 || ! POINTER_TYPE_P (TREE_TYPE (TREE_VALUE (arglist
)))
4876 || TREE_CHAIN (arglist
))
4880 /* If the format specifier was "%c", call __builtin_putchar(arg). */
4881 else if (strcmp (fmt_str
, "%c") == 0)
4884 || TREE_CODE (TREE_TYPE (TREE_VALUE (arglist
))) != INTEGER_TYPE
4885 || TREE_CHAIN (arglist
))
4891 /* We can't handle anything else with % args or %% ... yet. */
4892 if (strchr (fmt_str
, '%'))
4898 /* If the format specifier was "", printf does nothing. */
4899 if (fmt_str
[0] == '\0')
4901 /* If the format specifier has length of 1, call putchar. */
4902 if (fmt_str
[1] == '\0')
4904 /* Given printf("c"), (where c is any one character,)
4905 convert "c"[0] to an int and pass that to the replacement
4907 arg
= build_int_cst (NULL_TREE
, fmt_str
[0]);
4908 arglist
= build_tree_list (NULL_TREE
, arg
);
4913 /* If the format specifier was "string\n", call puts("string"). */
4914 size_t len
= strlen (fmt_str
);
4915 if (fmt_str
[len
- 1] == '\n')
4917 /* Create a NUL-terminated string that's one char shorter
4918 than the original, stripping off the trailing '\n'. */
4919 char *newstr
= alloca (len
);
4920 memcpy (newstr
, fmt_str
, len
- 1);
4921 newstr
[len
- 1] = 0;
4923 arg
= build_string_literal (len
, newstr
);
4924 arglist
= build_tree_list (NULL_TREE
, arg
);
4928 /* We'd like to arrange to call fputs(string,stdout) here,
4929 but we need stdout and don't have a way to get it yet. */
4936 fn
= build_function_call_expr (fn
, arglist
);
4937 if (TREE_CODE (fn
) == CALL_EXPR
)
4938 CALL_EXPR_TAILCALL (fn
) = CALL_EXPR_TAILCALL (exp
);
4939 return expand_expr (fn
, target
, mode
, EXPAND_NORMAL
);
4942 /* Expand EXP, a call to fprintf or fprintf_unlocked.
4943 Return 0 if a normal call should be emitted rather than transforming
4944 the function inline. If convenient, the result should be placed in
4945 TARGET with mode MODE. UNLOCKED indicates this is a fprintf_unlocked
4948 expand_builtin_fprintf (tree exp
, rtx target
, enum machine_mode mode
,
4951 tree arglist
= TREE_OPERAND (exp
, 1);
4952 tree fn_fputc
= unlocked
? implicit_built_in_decls
[BUILT_IN_FPUTC_UNLOCKED
]
4953 : implicit_built_in_decls
[BUILT_IN_FPUTC
];
4954 tree fn_fputs
= unlocked
? implicit_built_in_decls
[BUILT_IN_FPUTS_UNLOCKED
]
4955 : implicit_built_in_decls
[BUILT_IN_FPUTS
];
4956 const char *fmt_str
;
4957 tree fn
, fmt
, fp
, arg
;
4959 /* If the return value is used, don't do the transformation. */
4960 if (target
!= const0_rtx
)
4963 /* Verify the required arguments in the original call. */
4966 fp
= TREE_VALUE (arglist
);
4967 if (! POINTER_TYPE_P (TREE_TYPE (fp
)))
4969 arglist
= TREE_CHAIN (arglist
);
4972 fmt
= TREE_VALUE (arglist
);
4973 if (! POINTER_TYPE_P (TREE_TYPE (fmt
)))
4975 arglist
= TREE_CHAIN (arglist
);
4977 /* Check whether the format is a literal string constant. */
4978 fmt_str
= c_getstr (fmt
);
4979 if (fmt_str
== NULL
)
4982 /* If the format specifier was "%s", call __builtin_fputs(arg,fp). */
4983 if (strcmp (fmt_str
, "%s") == 0)
4986 || ! POINTER_TYPE_P (TREE_TYPE (TREE_VALUE (arglist
)))
4987 || TREE_CHAIN (arglist
))
4989 arg
= TREE_VALUE (arglist
);
4990 arglist
= build_tree_list (NULL_TREE
, fp
);
4991 arglist
= tree_cons (NULL_TREE
, arg
, arglist
);
4994 /* If the format specifier was "%c", call __builtin_fputc(arg,fp). */
4995 else if (strcmp (fmt_str
, "%c") == 0)
4998 || TREE_CODE (TREE_TYPE (TREE_VALUE (arglist
))) != INTEGER_TYPE
4999 || TREE_CHAIN (arglist
))
5001 arg
= TREE_VALUE (arglist
);
5002 arglist
= build_tree_list (NULL_TREE
, fp
);
5003 arglist
= tree_cons (NULL_TREE
, arg
, arglist
);
5008 /* We can't handle anything else with % args or %% ... yet. */
5009 if (strchr (fmt_str
, '%'))
5015 /* If the format specifier was "", fprintf does nothing. */
5016 if (fmt_str
[0] == '\0')
5018 /* Evaluate and ignore FILE* argument for side-effects. */
5019 expand_expr (fp
, const0_rtx
, VOIDmode
, EXPAND_NORMAL
);
5023 /* When "string" doesn't contain %, replace all cases of
5024 fprintf(stream,string) with fputs(string,stream). The fputs
5025 builtin will take care of special cases like length == 1. */
5026 arglist
= build_tree_list (NULL_TREE
, fp
);
5027 arglist
= tree_cons (NULL_TREE
, fmt
, arglist
);
5033 fn
= build_function_call_expr (fn
, arglist
);
5034 if (TREE_CODE (fn
) == CALL_EXPR
)
5035 CALL_EXPR_TAILCALL (fn
) = CALL_EXPR_TAILCALL (exp
);
5036 return expand_expr (fn
, target
, mode
, EXPAND_NORMAL
);
5039 /* Expand a call to sprintf with argument list ARGLIST. Return 0 if
5040 a normal call should be emitted rather than expanding the function
5041 inline. If convenient, the result should be placed in TARGET with
5045 expand_builtin_sprintf (tree arglist
, rtx target
, enum machine_mode mode
)
5047 tree orig_arglist
, dest
, fmt
;
5048 const char *fmt_str
;
5050 orig_arglist
= arglist
;
5052 /* Verify the required arguments in the original call. */
5055 dest
= TREE_VALUE (arglist
);
5056 if (! POINTER_TYPE_P (TREE_TYPE (dest
)))
5058 arglist
= TREE_CHAIN (arglist
);
5061 fmt
= TREE_VALUE (arglist
);
5062 if (! POINTER_TYPE_P (TREE_TYPE (fmt
)))
5064 arglist
= TREE_CHAIN (arglist
);
5066 /* Check whether the format is a literal string constant. */
5067 fmt_str
= c_getstr (fmt
);
5068 if (fmt_str
== NULL
)
5071 /* If the format doesn't contain % args or %%, use strcpy. */
5072 if (strchr (fmt_str
, '%') == 0)
5074 tree fn
= implicit_built_in_decls
[BUILT_IN_STRCPY
];
5077 if (arglist
|| ! fn
)
5079 expand_expr (build_function_call_expr (fn
, orig_arglist
),
5080 const0_rtx
, VOIDmode
, EXPAND_NORMAL
);
5081 if (target
== const0_rtx
)
5083 exp
= build_int_cst (NULL_TREE
, strlen (fmt_str
));
5084 return expand_expr (exp
, target
, mode
, EXPAND_NORMAL
);
5086 /* If the format is "%s", use strcpy if the result isn't used. */
5087 else if (strcmp (fmt_str
, "%s") == 0)
5090 fn
= implicit_built_in_decls
[BUILT_IN_STRCPY
];
5095 if (! arglist
|| TREE_CHAIN (arglist
))
5097 arg
= TREE_VALUE (arglist
);
5098 if (! POINTER_TYPE_P (TREE_TYPE (arg
)))
5101 if (target
!= const0_rtx
)
5103 len
= c_strlen (arg
, 1);
5104 if (! len
|| TREE_CODE (len
) != INTEGER_CST
)
5110 arglist
= build_tree_list (NULL_TREE
, arg
);
5111 arglist
= tree_cons (NULL_TREE
, dest
, arglist
);
5112 expand_expr (build_function_call_expr (fn
, arglist
),
5113 const0_rtx
, VOIDmode
, EXPAND_NORMAL
);
5115 if (target
== const0_rtx
)
5117 return expand_expr (len
, target
, mode
, EXPAND_NORMAL
);
5123 /* Expand a call to either the entry or exit function profiler. */
5126 expand_builtin_profile_func (bool exitp
)
5130 this = DECL_RTL (current_function_decl
);
5131 gcc_assert (MEM_P (this));
5132 this = XEXP (this, 0);
5135 which
= profile_function_exit_libfunc
;
5137 which
= profile_function_entry_libfunc
;
5139 emit_library_call (which
, LCT_NORMAL
, VOIDmode
, 2, this, Pmode
,
5140 expand_builtin_return_addr (BUILT_IN_RETURN_ADDRESS
,
5147 /* Given a trampoline address, make sure it satisfies TRAMPOLINE_ALIGNMENT. */
5150 round_trampoline_addr (rtx tramp
)
5152 rtx temp
, addend
, mask
;
5154 /* If we don't need too much alignment, we'll have been guaranteed
5155 proper alignment by get_trampoline_type. */
5156 if (TRAMPOLINE_ALIGNMENT
<= STACK_BOUNDARY
)
5159 /* Round address up to desired boundary. */
5160 temp
= gen_reg_rtx (Pmode
);
5161 addend
= GEN_INT (TRAMPOLINE_ALIGNMENT
/ BITS_PER_UNIT
- 1);
5162 mask
= GEN_INT (-TRAMPOLINE_ALIGNMENT
/ BITS_PER_UNIT
);
5164 temp
= expand_simple_binop (Pmode
, PLUS
, tramp
, addend
,
5165 temp
, 0, OPTAB_LIB_WIDEN
);
5166 tramp
= expand_simple_binop (Pmode
, AND
, temp
, mask
,
5167 temp
, 0, OPTAB_LIB_WIDEN
);
5173 expand_builtin_init_trampoline (tree arglist
)
5175 tree t_tramp
, t_func
, t_chain
;
5176 rtx r_tramp
, r_func
, r_chain
;
5177 #ifdef TRAMPOLINE_TEMPLATE
5181 if (!validate_arglist (arglist
, POINTER_TYPE
, POINTER_TYPE
,
5182 POINTER_TYPE
, VOID_TYPE
))
5185 t_tramp
= TREE_VALUE (arglist
);
5186 arglist
= TREE_CHAIN (arglist
);
5187 t_func
= TREE_VALUE (arglist
);
5188 arglist
= TREE_CHAIN (arglist
);
5189 t_chain
= TREE_VALUE (arglist
);
5191 r_tramp
= expand_expr (t_tramp
, NULL_RTX
, VOIDmode
, 0);
5192 r_func
= expand_expr (t_func
, NULL_RTX
, VOIDmode
, 0);
5193 r_chain
= expand_expr (t_chain
, NULL_RTX
, VOIDmode
, 0);
5195 /* Generate insns to initialize the trampoline. */
5196 r_tramp
= round_trampoline_addr (r_tramp
);
5197 #ifdef TRAMPOLINE_TEMPLATE
5198 blktramp
= gen_rtx_MEM (BLKmode
, r_tramp
);
5199 set_mem_align (blktramp
, TRAMPOLINE_ALIGNMENT
);
5200 emit_block_move (blktramp
, assemble_trampoline_template (),
5201 GEN_INT (TRAMPOLINE_SIZE
), BLOCK_OP_NORMAL
);
5203 trampolines_created
= 1;
5204 INITIALIZE_TRAMPOLINE (r_tramp
, r_func
, r_chain
);
5210 expand_builtin_adjust_trampoline (tree arglist
)
5214 if (!validate_arglist (arglist
, POINTER_TYPE
, VOID_TYPE
))
5217 tramp
= expand_expr (TREE_VALUE (arglist
), NULL_RTX
, VOIDmode
, 0);
5218 tramp
= round_trampoline_addr (tramp
);
5219 #ifdef TRAMPOLINE_ADJUST_ADDRESS
5220 TRAMPOLINE_ADJUST_ADDRESS (tramp
);
5226 /* Expand a call to the built-in signbit, signbitf or signbitl function.
5227 Return NULL_RTX if a normal call should be emitted rather than expanding
5228 the function in-line. EXP is the expression that is a call to the builtin
5229 function; if convenient, the result should be placed in TARGET. */
5232 expand_builtin_signbit (tree exp
, rtx target
)
5234 const struct real_format
*fmt
;
5235 enum machine_mode fmode
, imode
, rmode
;
5236 HOST_WIDE_INT hi
, lo
;
5241 arglist
= TREE_OPERAND (exp
, 1);
5242 if (!validate_arglist (arglist
, REAL_TYPE
, VOID_TYPE
))
5245 arg
= TREE_VALUE (arglist
);
5246 fmode
= TYPE_MODE (TREE_TYPE (arg
));
5247 rmode
= TYPE_MODE (TREE_TYPE (exp
));
5248 fmt
= REAL_MODE_FORMAT (fmode
);
5250 /* For floating point formats without a sign bit, implement signbit
5252 bitpos
= fmt
->signbit_ro
;
5255 /* But we can't do this if the format supports signed zero. */
5256 if (fmt
->has_signed_zero
&& HONOR_SIGNED_ZEROS (fmode
))
5259 arg
= fold_build2 (LT_EXPR
, TREE_TYPE (exp
), arg
,
5260 build_real (TREE_TYPE (arg
), dconst0
));
5261 return expand_expr (arg
, target
, VOIDmode
, EXPAND_NORMAL
);
5264 temp
= expand_expr (arg
, NULL_RTX
, VOIDmode
, 0);
5265 if (GET_MODE_SIZE (fmode
) <= UNITS_PER_WORD
)
5267 imode
= int_mode_for_mode (fmode
);
5268 if (imode
== BLKmode
)
5270 temp
= gen_lowpart (imode
, temp
);
5275 /* Handle targets with different FP word orders. */
5276 if (FLOAT_WORDS_BIG_ENDIAN
)
5277 word
= (GET_MODE_BITSIZE (fmode
) - bitpos
) / BITS_PER_WORD
;
5279 word
= bitpos
/ BITS_PER_WORD
;
5280 temp
= operand_subword_force (temp
, word
, fmode
);
5281 bitpos
= bitpos
% BITS_PER_WORD
;
5284 /* Force the intermediate word_mode (or narrower) result into a
5285 register. This avoids attempting to create paradoxical SUBREGs
5286 of floating point modes below. */
5287 temp
= force_reg (imode
, temp
);
5289 /* If the bitpos is within the "result mode" lowpart, the operation
5290 can be implement with a single bitwise AND. Otherwise, we need
5291 a right shift and an AND. */
5293 if (bitpos
< GET_MODE_BITSIZE (rmode
))
5295 if (bitpos
< HOST_BITS_PER_WIDE_INT
)
5298 lo
= (HOST_WIDE_INT
) 1 << bitpos
;
5302 hi
= (HOST_WIDE_INT
) 1 << (bitpos
- HOST_BITS_PER_WIDE_INT
);
5307 temp
= gen_lowpart (rmode
, temp
);
5308 temp
= expand_binop (rmode
, and_optab
, temp
,
5309 immed_double_const (lo
, hi
, rmode
),
5310 NULL_RTX
, 1, OPTAB_LIB_WIDEN
);
5314 /* Perform a logical right shift to place the signbit in the least
5315 significant bit, then truncate the result to the desired mode
5316 and mask just this bit. */
5317 temp
= expand_shift (RSHIFT_EXPR
, imode
, temp
,
5318 build_int_cst (NULL_TREE
, bitpos
), NULL_RTX
, 1);
5319 temp
= gen_lowpart (rmode
, temp
);
5320 temp
= expand_binop (rmode
, and_optab
, temp
, const1_rtx
,
5321 NULL_RTX
, 1, OPTAB_LIB_WIDEN
);
5327 /* Expand fork or exec calls. TARGET is the desired target of the
5328 call. ARGLIST is the list of arguments of the call. FN is the
5329 identificator of the actual function. IGNORE is nonzero if the
5330 value is to be ignored. */
5333 expand_builtin_fork_or_exec (tree fn
, tree arglist
, rtx target
, int ignore
)
5338 /* If we are not profiling, just call the function. */
5339 if (!profile_arc_flag
)
5342 /* Otherwise call the wrapper. This should be equivalent for the rest of
5343 compiler, so the code does not diverge, and the wrapper may run the
5344 code necessary for keeping the profiling sane. */
5346 switch (DECL_FUNCTION_CODE (fn
))
5349 id
= get_identifier ("__gcov_fork");
5352 case BUILT_IN_EXECL
:
5353 id
= get_identifier ("__gcov_execl");
5356 case BUILT_IN_EXECV
:
5357 id
= get_identifier ("__gcov_execv");
5360 case BUILT_IN_EXECLP
:
5361 id
= get_identifier ("__gcov_execlp");
5364 case BUILT_IN_EXECLE
:
5365 id
= get_identifier ("__gcov_execle");
5368 case BUILT_IN_EXECVP
:
5369 id
= get_identifier ("__gcov_execvp");
5372 case BUILT_IN_EXECVE
:
5373 id
= get_identifier ("__gcov_execve");
5380 decl
= build_decl (FUNCTION_DECL
, id
, TREE_TYPE (fn
));
5381 DECL_EXTERNAL (decl
) = 1;
5382 TREE_PUBLIC (decl
) = 1;
5383 DECL_ARTIFICIAL (decl
) = 1;
5384 TREE_NOTHROW (decl
) = 1;
5385 call
= build_function_call_expr (decl
, arglist
);
5387 return expand_call (call
, target
, ignore
);
5391 /* Expand the __sync_xxx_and_fetch and __sync_fetch_and_xxx intrinsics.
5392 ARGLIST is the operands list to the function. CODE is the rtx code
5393 that corresponds to the arithmetic or logical operation from the name;
5394 an exception here is that NOT actually means NAND. TARGET is an optional
5395 place for us to store the results; AFTER is true if this is the
5396 fetch_and_xxx form. IGNORE is true if we don't actually care about
5397 the result of the operation at all. */
5400 expand_builtin_sync_operation (tree arglist
, enum rtx_code code
, bool after
,
5401 rtx target
, bool ignore
)
5403 enum machine_mode mode
;
5406 /* Expand the operands. */
5407 addr
= expand_expr (TREE_VALUE (arglist
), NULL
, Pmode
, EXPAND_SUM
);
5408 mode
= TYPE_MODE (TREE_TYPE (TREE_TYPE (TREE_VALUE (arglist
))));
5410 arglist
= TREE_CHAIN (arglist
);
5411 val
= expand_expr (TREE_VALUE (arglist
), NULL
, mode
, EXPAND_NORMAL
);
5413 /* Note that we explicitly do not want any alias information for this
5414 memory, so that we kill all other live memories. Otherwise we don't
5415 satisfy the full barrier semantics of the intrinsic. */
5416 mem
= validize_mem (gen_rtx_MEM (mode
, addr
));
5417 MEM_VOLATILE_P (mem
) = 1;
5420 return expand_sync_operation (mem
, val
, code
);
5422 return expand_sync_fetch_operation (mem
, val
, code
, after
, target
);
5425 /* Expand the __sync_val_compare_and_swap and __sync_bool_compare_and_swap
5426 intrinsics. ARGLIST is the operands list to the function. IS_BOOL is
5427 true if this is the boolean form. TARGET is a place for us to store the
5428 results; this is NOT optional if IS_BOOL is true. */
5431 expand_builtin_compare_and_swap (tree arglist
, bool is_bool
, rtx target
)
5433 enum machine_mode mode
;
5434 rtx addr
, old_val
, new_val
, mem
;
5436 /* Expand the operands. */
5437 addr
= expand_expr (TREE_VALUE (arglist
), NULL
, Pmode
, EXPAND_SUM
);
5438 mode
= TYPE_MODE (TREE_TYPE (TREE_TYPE (TREE_VALUE (arglist
))));
5440 arglist
= TREE_CHAIN (arglist
);
5441 old_val
= expand_expr (TREE_VALUE (arglist
), NULL
, mode
, EXPAND_NORMAL
);
5443 arglist
= TREE_CHAIN (arglist
);
5444 new_val
= expand_expr (TREE_VALUE (arglist
), NULL
, mode
, EXPAND_NORMAL
);
5446 /* Note that we explicitly do not want any alias information for this
5447 memory, so that we kill all other live memories. Otherwise we don't
5448 satisfy the full barrier semantics of the intrinsic. */
5449 mem
= validize_mem (gen_rtx_MEM (mode
, addr
));
5450 MEM_VOLATILE_P (mem
) = 1;
5453 return expand_bool_compare_and_swap (mem
, old_val
, new_val
, target
);
5455 return expand_val_compare_and_swap (mem
, old_val
, new_val
, target
);
5458 /* Expand the __sync_lock_test_and_set intrinsic. Note that the most
5459 general form is actually an atomic exchange, and some targets only
5460 support a reduced form with the second argument being a constant 1.
5461 ARGLIST is the operands list to the function; TARGET is an optional
5462 place for us to store the results. */
5465 expand_builtin_lock_test_and_set (tree arglist
, rtx target
)
5467 enum machine_mode mode
;
5470 /* Expand the operands. */
5471 addr
= expand_expr (TREE_VALUE (arglist
), NULL
, Pmode
, EXPAND_NORMAL
);
5472 mode
= TYPE_MODE (TREE_TYPE (TREE_TYPE (TREE_VALUE (arglist
))));
5474 arglist
= TREE_CHAIN (arglist
);
5475 val
= expand_expr (TREE_VALUE (arglist
), NULL
, mode
, EXPAND_NORMAL
);
5477 /* Note that we explicitly do not want any alias information for this
5478 memory, so that we kill all other live memories. Otherwise we don't
5479 satisfy the barrier semantics of the intrinsic. */
5480 mem
= validize_mem (gen_rtx_MEM (mode
, addr
));
5481 MEM_VOLATILE_P (mem
) = 1;
5483 return expand_sync_lock_test_and_set (mem
, val
, target
);
5486 /* Expand the __sync_synchronize intrinsic. */
5489 expand_builtin_synchronize (void)
5493 #ifdef HAVE_memory_barrier
5494 if (HAVE_memory_barrier
)
5496 emit_insn (gen_memory_barrier ());
5501 /* If no explicit memory barrier instruction is available, create an empty
5502 asm stmt that will prevent compiler movement across the barrier. */
5503 body
= gen_rtx_ASM_INPUT (VOIDmode
, "");
5504 MEM_VOLATILE_P (body
) = 1;
5508 /* Expand the __sync_lock_release intrinsic. ARGLIST is the operands list
5512 expand_builtin_lock_release (tree arglist
)
5514 enum machine_mode mode
;
5515 enum insn_code icode
;
5516 rtx addr
, val
, mem
, insn
;
5518 /* Expand the operands. */
5519 addr
= expand_expr (TREE_VALUE (arglist
), NULL
, Pmode
, EXPAND_NORMAL
);
5520 mode
= TYPE_MODE (TREE_TYPE (TREE_TYPE (TREE_VALUE (arglist
))));
5523 /* Note that we explicitly do not want any alias information for this
5524 memory, so that we kill all other live memories. Otherwise we don't
5525 satisfy the barrier semantics of the intrinsic. */
5526 mem
= validize_mem (gen_rtx_MEM (mode
, addr
));
5527 MEM_VOLATILE_P (mem
) = 1;
5529 /* If there is an explicit operation in the md file, use it. */
5530 icode
= sync_lock_release
[mode
];
5531 if (icode
!= CODE_FOR_nothing
)
5533 if (!insn_data
[icode
].operand
[1].predicate (val
, mode
))
5534 val
= force_reg (mode
, val
);
5536 insn
= GEN_FCN (icode
) (mem
, val
);
5544 /* Otherwise we can implement this operation by emitting a barrier
5545 followed by a store of zero. */
5546 expand_builtin_synchronize ();
5547 emit_move_insn (mem
, val
);
5550 /* Expand an expression EXP that calls a built-in function,
5551 with result going to TARGET if that's convenient
5552 (and in mode MODE if that's convenient).
5553 SUBTARGET may be used as the target for computing one of EXP's operands.
5554 IGNORE is nonzero if the value is to be ignored. */
5557 expand_builtin (tree exp
, rtx target
, rtx subtarget
, enum machine_mode mode
,
5560 tree fndecl
= get_callee_fndecl (exp
);
5561 tree arglist
= TREE_OPERAND (exp
, 1);
5562 enum built_in_function fcode
= DECL_FUNCTION_CODE (fndecl
);
5563 enum machine_mode target_mode
= TYPE_MODE (TREE_TYPE (exp
));
5565 if (DECL_BUILT_IN_CLASS (fndecl
) == BUILT_IN_MD
)
5566 return targetm
.expand_builtin (exp
, target
, subtarget
, mode
, ignore
);
5568 /* When not optimizing, generate calls to library functions for a certain
5571 && !called_as_built_in (fndecl
)
5572 && DECL_ASSEMBLER_NAME_SET_P (fndecl
)
5573 && fcode
!= BUILT_IN_ALLOCA
)
5574 return expand_call (exp
, target
, ignore
);
5576 /* The built-in function expanders test for target == const0_rtx
5577 to determine whether the function's result will be ignored. */
5579 target
= const0_rtx
;
5581 /* If the result of a pure or const built-in function is ignored, and
5582 none of its arguments are volatile, we can avoid expanding the
5583 built-in call and just evaluate the arguments for side-effects. */
5584 if (target
== const0_rtx
5585 && (DECL_IS_PURE (fndecl
) || TREE_READONLY (fndecl
)))
5587 bool volatilep
= false;
5590 for (arg
= arglist
; arg
; arg
= TREE_CHAIN (arg
))
5591 if (TREE_THIS_VOLATILE (TREE_VALUE (arg
)))
5599 for (arg
= arglist
; arg
; arg
= TREE_CHAIN (arg
))
5600 expand_expr (TREE_VALUE (arg
), const0_rtx
,
5601 VOIDmode
, EXPAND_NORMAL
);
5609 case BUILT_IN_FABSF
:
5610 case BUILT_IN_FABSL
:
5611 target
= expand_builtin_fabs (arglist
, target
, subtarget
);
5616 case BUILT_IN_COPYSIGN
:
5617 case BUILT_IN_COPYSIGNF
:
5618 case BUILT_IN_COPYSIGNL
:
5619 target
= expand_builtin_copysign (arglist
, target
, subtarget
);
5624 /* Just do a normal library call if we were unable to fold
5627 case BUILT_IN_CABSF
:
5628 case BUILT_IN_CABSL
:
5634 case BUILT_IN_EXP10
:
5635 case BUILT_IN_EXP10F
:
5636 case BUILT_IN_EXP10L
:
5637 case BUILT_IN_POW10
:
5638 case BUILT_IN_POW10F
:
5639 case BUILT_IN_POW10L
:
5641 case BUILT_IN_EXP2F
:
5642 case BUILT_IN_EXP2L
:
5643 case BUILT_IN_EXPM1
:
5644 case BUILT_IN_EXPM1F
:
5645 case BUILT_IN_EXPM1L
:
5647 case BUILT_IN_LOGBF
:
5648 case BUILT_IN_LOGBL
:
5649 case BUILT_IN_ILOGB
:
5650 case BUILT_IN_ILOGBF
:
5651 case BUILT_IN_ILOGBL
:
5655 case BUILT_IN_LOG10
:
5656 case BUILT_IN_LOG10F
:
5657 case BUILT_IN_LOG10L
:
5659 case BUILT_IN_LOG2F
:
5660 case BUILT_IN_LOG2L
:
5661 case BUILT_IN_LOG1P
:
5662 case BUILT_IN_LOG1PF
:
5663 case BUILT_IN_LOG1PL
:
5668 case BUILT_IN_ASINF
:
5669 case BUILT_IN_ASINL
:
5671 case BUILT_IN_ACOSF
:
5672 case BUILT_IN_ACOSL
:
5674 case BUILT_IN_ATANF
:
5675 case BUILT_IN_ATANL
:
5676 /* Treat these like sqrt only if unsafe math optimizations are allowed,
5677 because of possible accuracy problems. */
5678 if (! flag_unsafe_math_optimizations
)
5681 case BUILT_IN_SQRTF
:
5682 case BUILT_IN_SQRTL
:
5683 case BUILT_IN_FLOOR
:
5684 case BUILT_IN_FLOORF
:
5685 case BUILT_IN_FLOORL
:
5687 case BUILT_IN_CEILF
:
5688 case BUILT_IN_CEILL
:
5689 case BUILT_IN_TRUNC
:
5690 case BUILT_IN_TRUNCF
:
5691 case BUILT_IN_TRUNCL
:
5692 case BUILT_IN_ROUND
:
5693 case BUILT_IN_ROUNDF
:
5694 case BUILT_IN_ROUNDL
:
5695 case BUILT_IN_NEARBYINT
:
5696 case BUILT_IN_NEARBYINTF
:
5697 case BUILT_IN_NEARBYINTL
:
5699 case BUILT_IN_RINTF
:
5700 case BUILT_IN_RINTL
:
5701 case BUILT_IN_LRINT
:
5702 case BUILT_IN_LRINTF
:
5703 case BUILT_IN_LRINTL
:
5704 case BUILT_IN_LLRINT
:
5705 case BUILT_IN_LLRINTF
:
5706 case BUILT_IN_LLRINTL
:
5707 target
= expand_builtin_mathfn (exp
, target
, subtarget
);
5712 case BUILT_IN_LCEIL
:
5713 case BUILT_IN_LCEILF
:
5714 case BUILT_IN_LCEILL
:
5715 case BUILT_IN_LLCEIL
:
5716 case BUILT_IN_LLCEILF
:
5717 case BUILT_IN_LLCEILL
:
5718 case BUILT_IN_LFLOOR
:
5719 case BUILT_IN_LFLOORF
:
5720 case BUILT_IN_LFLOORL
:
5721 case BUILT_IN_LLFLOOR
:
5722 case BUILT_IN_LLFLOORF
:
5723 case BUILT_IN_LLFLOORL
:
5724 target
= expand_builtin_int_roundingfn (exp
, target
, subtarget
);
5732 target
= expand_builtin_pow (exp
, target
, subtarget
);
5738 case BUILT_IN_POWIF
:
5739 case BUILT_IN_POWIL
:
5740 target
= expand_builtin_powi (exp
, target
, subtarget
);
5745 case BUILT_IN_ATAN2
:
5746 case BUILT_IN_ATAN2F
:
5747 case BUILT_IN_ATAN2L
:
5748 case BUILT_IN_LDEXP
:
5749 case BUILT_IN_LDEXPF
:
5750 case BUILT_IN_LDEXPL
:
5752 case BUILT_IN_FMODF
:
5753 case BUILT_IN_FMODL
:
5755 case BUILT_IN_DREMF
:
5756 case BUILT_IN_DREML
:
5757 if (! flag_unsafe_math_optimizations
)
5759 target
= expand_builtin_mathfn_2 (exp
, target
, subtarget
);
5770 if (! flag_unsafe_math_optimizations
)
5772 target
= expand_builtin_mathfn_3 (exp
, target
, subtarget
);
5777 case BUILT_IN_APPLY_ARGS
:
5778 return expand_builtin_apply_args ();
5780 /* __builtin_apply (FUNCTION, ARGUMENTS, ARGSIZE) invokes
5781 FUNCTION with a copy of the parameters described by
5782 ARGUMENTS, and ARGSIZE. It returns a block of memory
5783 allocated on the stack into which is stored all the registers
5784 that might possibly be used for returning the result of a
5785 function. ARGUMENTS is the value returned by
5786 __builtin_apply_args. ARGSIZE is the number of bytes of
5787 arguments that must be copied. ??? How should this value be
5788 computed? We'll also need a safe worst case value for varargs
5790 case BUILT_IN_APPLY
:
5791 if (!validate_arglist (arglist
, POINTER_TYPE
,
5792 POINTER_TYPE
, INTEGER_TYPE
, VOID_TYPE
)
5793 && !validate_arglist (arglist
, REFERENCE_TYPE
,
5794 POINTER_TYPE
, INTEGER_TYPE
, VOID_TYPE
))
5802 for (t
= arglist
, i
= 0; t
; t
= TREE_CHAIN (t
), i
++)
5803 ops
[i
] = expand_expr (TREE_VALUE (t
), NULL_RTX
, VOIDmode
, 0);
5805 return expand_builtin_apply (ops
[0], ops
[1], ops
[2]);
5808 /* __builtin_return (RESULT) causes the function to return the
5809 value described by RESULT. RESULT is address of the block of
5810 memory returned by __builtin_apply. */
5811 case BUILT_IN_RETURN
:
5812 if (validate_arglist (arglist
, POINTER_TYPE
, VOID_TYPE
))
5813 expand_builtin_return (expand_expr (TREE_VALUE (arglist
),
5814 NULL_RTX
, VOIDmode
, 0));
5817 case BUILT_IN_SAVEREGS
:
5818 return expand_builtin_saveregs ();
5820 case BUILT_IN_ARGS_INFO
:
5821 return expand_builtin_args_info (arglist
);
5823 /* Return the address of the first anonymous stack arg. */
5824 case BUILT_IN_NEXT_ARG
:
5825 if (fold_builtin_next_arg (arglist
))
5827 return expand_builtin_next_arg ();
5829 case BUILT_IN_CLASSIFY_TYPE
:
5830 return expand_builtin_classify_type (arglist
);
5832 case BUILT_IN_CONSTANT_P
:
5835 case BUILT_IN_FRAME_ADDRESS
:
5836 case BUILT_IN_RETURN_ADDRESS
:
5837 return expand_builtin_frame_address (fndecl
, arglist
);
5839 /* Returns the address of the area where the structure is returned.
5841 case BUILT_IN_AGGREGATE_INCOMING_ADDRESS
:
5843 || ! AGGREGATE_TYPE_P (TREE_TYPE (TREE_TYPE (current_function_decl
)))
5844 || !MEM_P (DECL_RTL (DECL_RESULT (current_function_decl
))))
5847 return XEXP (DECL_RTL (DECL_RESULT (current_function_decl
)), 0);
5849 case BUILT_IN_ALLOCA
:
5850 target
= expand_builtin_alloca (arglist
, target
);
5855 case BUILT_IN_STACK_SAVE
:
5856 return expand_stack_save ();
5858 case BUILT_IN_STACK_RESTORE
:
5859 expand_stack_restore (TREE_VALUE (arglist
));
5864 case BUILT_IN_FFSLL
:
5865 case BUILT_IN_FFSIMAX
:
5866 target
= expand_builtin_unop (target_mode
, arglist
, target
,
5867 subtarget
, ffs_optab
);
5874 case BUILT_IN_CLZLL
:
5875 case BUILT_IN_CLZIMAX
:
5876 target
= expand_builtin_unop (target_mode
, arglist
, target
,
5877 subtarget
, clz_optab
);
5884 case BUILT_IN_CTZLL
:
5885 case BUILT_IN_CTZIMAX
:
5886 target
= expand_builtin_unop (target_mode
, arglist
, target
,
5887 subtarget
, ctz_optab
);
5892 case BUILT_IN_POPCOUNT
:
5893 case BUILT_IN_POPCOUNTL
:
5894 case BUILT_IN_POPCOUNTLL
:
5895 case BUILT_IN_POPCOUNTIMAX
:
5896 target
= expand_builtin_unop (target_mode
, arglist
, target
,
5897 subtarget
, popcount_optab
);
5902 case BUILT_IN_PARITY
:
5903 case BUILT_IN_PARITYL
:
5904 case BUILT_IN_PARITYLL
:
5905 case BUILT_IN_PARITYIMAX
:
5906 target
= expand_builtin_unop (target_mode
, arglist
, target
,
5907 subtarget
, parity_optab
);
5912 case BUILT_IN_STRLEN
:
5913 target
= expand_builtin_strlen (arglist
, target
, target_mode
);
5918 case BUILT_IN_STRCPY
:
5919 target
= expand_builtin_strcpy (fndecl
, arglist
, target
, mode
);
5924 case BUILT_IN_STRNCPY
:
5925 target
= expand_builtin_strncpy (exp
, target
, mode
);
5930 case BUILT_IN_STPCPY
:
5931 target
= expand_builtin_stpcpy (exp
, target
, mode
);
5936 case BUILT_IN_STRCAT
:
5937 target
= expand_builtin_strcat (fndecl
, arglist
, target
, mode
);
5942 case BUILT_IN_STRNCAT
:
5943 target
= expand_builtin_strncat (arglist
, target
, mode
);
5948 case BUILT_IN_STRSPN
:
5949 target
= expand_builtin_strspn (arglist
, target
, mode
);
5954 case BUILT_IN_STRCSPN
:
5955 target
= expand_builtin_strcspn (arglist
, target
, mode
);
5960 case BUILT_IN_STRSTR
:
5961 target
= expand_builtin_strstr (arglist
, TREE_TYPE (exp
), target
, mode
);
5966 case BUILT_IN_STRPBRK
:
5967 target
= expand_builtin_strpbrk (arglist
, TREE_TYPE (exp
), target
, mode
);
5972 case BUILT_IN_INDEX
:
5973 case BUILT_IN_STRCHR
:
5974 target
= expand_builtin_strchr (arglist
, TREE_TYPE (exp
), target
, mode
);
5979 case BUILT_IN_RINDEX
:
5980 case BUILT_IN_STRRCHR
:
5981 target
= expand_builtin_strrchr (arglist
, TREE_TYPE (exp
), target
, mode
);
5986 case BUILT_IN_MEMCPY
:
5987 target
= expand_builtin_memcpy (exp
, target
, mode
);
5992 case BUILT_IN_MEMPCPY
:
5993 target
= expand_builtin_mempcpy (arglist
, TREE_TYPE (exp
), target
, mode
, /*endp=*/ 1);
5998 case BUILT_IN_MEMMOVE
:
5999 target
= expand_builtin_memmove (arglist
, TREE_TYPE (exp
), target
,
6005 case BUILT_IN_BCOPY
:
6006 target
= expand_builtin_bcopy (exp
);
6011 case BUILT_IN_MEMSET
:
6012 target
= expand_builtin_memset (arglist
, target
, mode
, exp
);
6017 case BUILT_IN_BZERO
:
6018 target
= expand_builtin_bzero (exp
);
6023 case BUILT_IN_STRCMP
:
6024 target
= expand_builtin_strcmp (exp
, target
, mode
);
6029 case BUILT_IN_STRNCMP
:
6030 target
= expand_builtin_strncmp (exp
, target
, mode
);
6036 case BUILT_IN_MEMCMP
:
6037 target
= expand_builtin_memcmp (exp
, arglist
, target
, mode
);
6042 case BUILT_IN_SETJMP
:
6043 target
= expand_builtin_setjmp (arglist
, target
);
6048 /* __builtin_longjmp is passed a pointer to an array of five words.
6049 It's similar to the C library longjmp function but works with
6050 __builtin_setjmp above. */
6051 case BUILT_IN_LONGJMP
:
6052 if (!validate_arglist (arglist
, POINTER_TYPE
, INTEGER_TYPE
, VOID_TYPE
))
6056 rtx buf_addr
= expand_expr (TREE_VALUE (arglist
), subtarget
,
6058 rtx value
= expand_expr (TREE_VALUE (TREE_CHAIN (arglist
)),
6059 NULL_RTX
, VOIDmode
, 0);
6061 if (value
!= const1_rtx
)
6063 error ("%<__builtin_longjmp%> second argument must be 1");
6067 expand_builtin_longjmp (buf_addr
, value
);
6071 case BUILT_IN_NONLOCAL_GOTO
:
6072 target
= expand_builtin_nonlocal_goto (arglist
);
6077 /* This updates the setjmp buffer that is its argument with the value
6078 of the current stack pointer. */
6079 case BUILT_IN_UPDATE_SETJMP_BUF
:
6080 if (validate_arglist (arglist
, POINTER_TYPE
, VOID_TYPE
))
6083 = expand_expr (TREE_VALUE (arglist
), NULL_RTX
, VOIDmode
, 0);
6085 expand_builtin_update_setjmp_buf (buf_addr
);
6091 expand_builtin_trap ();
6094 case BUILT_IN_PRINTF
:
6095 target
= expand_builtin_printf (exp
, target
, mode
, false);
6100 case BUILT_IN_PRINTF_UNLOCKED
:
6101 target
= expand_builtin_printf (exp
, target
, mode
, true);
6106 case BUILT_IN_FPUTS
:
6107 target
= expand_builtin_fputs (arglist
, target
, false);
6111 case BUILT_IN_FPUTS_UNLOCKED
:
6112 target
= expand_builtin_fputs (arglist
, target
, true);
6117 case BUILT_IN_FPRINTF
:
6118 target
= expand_builtin_fprintf (exp
, target
, mode
, false);
6123 case BUILT_IN_FPRINTF_UNLOCKED
:
6124 target
= expand_builtin_fprintf (exp
, target
, mode
, true);
6129 case BUILT_IN_SPRINTF
:
6130 target
= expand_builtin_sprintf (arglist
, target
, mode
);
6135 case BUILT_IN_SIGNBIT
:
6136 case BUILT_IN_SIGNBITF
:
6137 case BUILT_IN_SIGNBITL
:
6138 target
= expand_builtin_signbit (exp
, target
);
6143 /* Various hooks for the DWARF 2 __throw routine. */
6144 case BUILT_IN_UNWIND_INIT
:
6145 expand_builtin_unwind_init ();
6147 case BUILT_IN_DWARF_CFA
:
6148 return virtual_cfa_rtx
;
6149 #ifdef DWARF2_UNWIND_INFO
6150 case BUILT_IN_DWARF_SP_COLUMN
:
6151 return expand_builtin_dwarf_sp_column ();
6152 case BUILT_IN_INIT_DWARF_REG_SIZES
:
6153 expand_builtin_init_dwarf_reg_sizes (TREE_VALUE (arglist
));
6156 case BUILT_IN_FROB_RETURN_ADDR
:
6157 return expand_builtin_frob_return_addr (TREE_VALUE (arglist
));
6158 case BUILT_IN_EXTRACT_RETURN_ADDR
:
6159 return expand_builtin_extract_return_addr (TREE_VALUE (arglist
));
6160 case BUILT_IN_EH_RETURN
:
6161 expand_builtin_eh_return (TREE_VALUE (arglist
),
6162 TREE_VALUE (TREE_CHAIN (arglist
)));
6164 #ifdef EH_RETURN_DATA_REGNO
6165 case BUILT_IN_EH_RETURN_DATA_REGNO
:
6166 return expand_builtin_eh_return_data_regno (arglist
);
6168 case BUILT_IN_EXTEND_POINTER
:
6169 return expand_builtin_extend_pointer (TREE_VALUE (arglist
));
6171 case BUILT_IN_VA_START
:
6172 case BUILT_IN_STDARG_START
:
6173 return expand_builtin_va_start (arglist
);
6174 case BUILT_IN_VA_END
:
6175 return expand_builtin_va_end (arglist
);
6176 case BUILT_IN_VA_COPY
:
6177 return expand_builtin_va_copy (arglist
);
6178 case BUILT_IN_EXPECT
:
6179 return expand_builtin_expect (arglist
, target
);
6180 case BUILT_IN_PREFETCH
:
6181 expand_builtin_prefetch (arglist
);
6184 case BUILT_IN_PROFILE_FUNC_ENTER
:
6185 return expand_builtin_profile_func (false);
6186 case BUILT_IN_PROFILE_FUNC_EXIT
:
6187 return expand_builtin_profile_func (true);
6189 case BUILT_IN_INIT_TRAMPOLINE
:
6190 return expand_builtin_init_trampoline (arglist
);
6191 case BUILT_IN_ADJUST_TRAMPOLINE
:
6192 return expand_builtin_adjust_trampoline (arglist
);
6195 case BUILT_IN_EXECL
:
6196 case BUILT_IN_EXECV
:
6197 case BUILT_IN_EXECLP
:
6198 case BUILT_IN_EXECLE
:
6199 case BUILT_IN_EXECVP
:
6200 case BUILT_IN_EXECVE
:
6201 target
= expand_builtin_fork_or_exec (fndecl
, arglist
, target
, ignore
);
6206 case BUILT_IN_FETCH_AND_ADD_1
:
6207 case BUILT_IN_FETCH_AND_ADD_2
:
6208 case BUILT_IN_FETCH_AND_ADD_4
:
6209 case BUILT_IN_FETCH_AND_ADD_8
:
6210 target
= expand_builtin_sync_operation (arglist
, PLUS
,
6211 false, target
, ignore
);
6216 case BUILT_IN_FETCH_AND_SUB_1
:
6217 case BUILT_IN_FETCH_AND_SUB_2
:
6218 case BUILT_IN_FETCH_AND_SUB_4
:
6219 case BUILT_IN_FETCH_AND_SUB_8
:
6220 target
= expand_builtin_sync_operation (arglist
, MINUS
,
6221 false, target
, ignore
);
6226 case BUILT_IN_FETCH_AND_OR_1
:
6227 case BUILT_IN_FETCH_AND_OR_2
:
6228 case BUILT_IN_FETCH_AND_OR_4
:
6229 case BUILT_IN_FETCH_AND_OR_8
:
6230 target
= expand_builtin_sync_operation (arglist
, IOR
,
6231 false, target
, ignore
);
6236 case BUILT_IN_FETCH_AND_AND_1
:
6237 case BUILT_IN_FETCH_AND_AND_2
:
6238 case BUILT_IN_FETCH_AND_AND_4
:
6239 case BUILT_IN_FETCH_AND_AND_8
:
6240 target
= expand_builtin_sync_operation (arglist
, AND
,
6241 false, target
, ignore
);
6246 case BUILT_IN_FETCH_AND_XOR_1
:
6247 case BUILT_IN_FETCH_AND_XOR_2
:
6248 case BUILT_IN_FETCH_AND_XOR_4
:
6249 case BUILT_IN_FETCH_AND_XOR_8
:
6250 target
= expand_builtin_sync_operation (arglist
, XOR
,
6251 false, target
, ignore
);
6256 case BUILT_IN_FETCH_AND_NAND_1
:
6257 case BUILT_IN_FETCH_AND_NAND_2
:
6258 case BUILT_IN_FETCH_AND_NAND_4
:
6259 case BUILT_IN_FETCH_AND_NAND_8
:
6260 target
= expand_builtin_sync_operation (arglist
, NOT
,
6261 false, target
, ignore
);
6266 case BUILT_IN_ADD_AND_FETCH_1
:
6267 case BUILT_IN_ADD_AND_FETCH_2
:
6268 case BUILT_IN_ADD_AND_FETCH_4
:
6269 case BUILT_IN_ADD_AND_FETCH_8
:
6270 target
= expand_builtin_sync_operation (arglist
, PLUS
,
6271 true, target
, ignore
);
6276 case BUILT_IN_SUB_AND_FETCH_1
:
6277 case BUILT_IN_SUB_AND_FETCH_2
:
6278 case BUILT_IN_SUB_AND_FETCH_4
:
6279 case BUILT_IN_SUB_AND_FETCH_8
:
6280 target
= expand_builtin_sync_operation (arglist
, MINUS
,
6281 true, target
, ignore
);
6286 case BUILT_IN_OR_AND_FETCH_1
:
6287 case BUILT_IN_OR_AND_FETCH_2
:
6288 case BUILT_IN_OR_AND_FETCH_4
:
6289 case BUILT_IN_OR_AND_FETCH_8
:
6290 target
= expand_builtin_sync_operation (arglist
, IOR
,
6291 true, target
, ignore
);
6296 case BUILT_IN_AND_AND_FETCH_1
:
6297 case BUILT_IN_AND_AND_FETCH_2
:
6298 case BUILT_IN_AND_AND_FETCH_4
:
6299 case BUILT_IN_AND_AND_FETCH_8
:
6300 target
= expand_builtin_sync_operation (arglist
, AND
,
6301 true, target
, ignore
);
6306 case BUILT_IN_XOR_AND_FETCH_1
:
6307 case BUILT_IN_XOR_AND_FETCH_2
:
6308 case BUILT_IN_XOR_AND_FETCH_4
:
6309 case BUILT_IN_XOR_AND_FETCH_8
:
6310 target
= expand_builtin_sync_operation (arglist
, XOR
,
6311 true, target
, ignore
);
6316 case BUILT_IN_NAND_AND_FETCH_1
:
6317 case BUILT_IN_NAND_AND_FETCH_2
:
6318 case BUILT_IN_NAND_AND_FETCH_4
:
6319 case BUILT_IN_NAND_AND_FETCH_8
:
6320 target
= expand_builtin_sync_operation (arglist
, NOT
,
6321 true, target
, ignore
);
6326 case BUILT_IN_BOOL_COMPARE_AND_SWAP_1
:
6327 case BUILT_IN_BOOL_COMPARE_AND_SWAP_2
:
6328 case BUILT_IN_BOOL_COMPARE_AND_SWAP_4
:
6329 case BUILT_IN_BOOL_COMPARE_AND_SWAP_8
:
6330 if (mode
== VOIDmode
)
6331 mode
= TYPE_MODE (boolean_type_node
);
6332 if (!target
|| !register_operand (target
, mode
))
6333 target
= gen_reg_rtx (mode
);
6334 target
= expand_builtin_compare_and_swap (arglist
, true, target
);
6339 case BUILT_IN_VAL_COMPARE_AND_SWAP_1
:
6340 case BUILT_IN_VAL_COMPARE_AND_SWAP_2
:
6341 case BUILT_IN_VAL_COMPARE_AND_SWAP_4
:
6342 case BUILT_IN_VAL_COMPARE_AND_SWAP_8
:
6343 target
= expand_builtin_compare_and_swap (arglist
, false, target
);
6348 case BUILT_IN_LOCK_TEST_AND_SET_1
:
6349 case BUILT_IN_LOCK_TEST_AND_SET_2
:
6350 case BUILT_IN_LOCK_TEST_AND_SET_4
:
6351 case BUILT_IN_LOCK_TEST_AND_SET_8
:
6352 target
= expand_builtin_lock_test_and_set (arglist
, target
);
6357 case BUILT_IN_LOCK_RELEASE_1
:
6358 case BUILT_IN_LOCK_RELEASE_2
:
6359 case BUILT_IN_LOCK_RELEASE_4
:
6360 case BUILT_IN_LOCK_RELEASE_8
:
6361 expand_builtin_lock_release (arglist
);
6364 case BUILT_IN_SYNCHRONIZE
:
6365 expand_builtin_synchronize ();
6368 case BUILT_IN_OBJECT_SIZE
:
6369 return expand_builtin_object_size (exp
);
6371 case BUILT_IN_MEMCPY_CHK
:
6372 case BUILT_IN_MEMPCPY_CHK
:
6373 case BUILT_IN_MEMMOVE_CHK
:
6374 case BUILT_IN_MEMSET_CHK
:
6375 target
= expand_builtin_memory_chk (exp
, target
, mode
, fcode
);
6380 case BUILT_IN_STRCPY_CHK
:
6381 case BUILT_IN_STPCPY_CHK
:
6382 case BUILT_IN_STRNCPY_CHK
:
6383 case BUILT_IN_STRCAT_CHK
:
6384 case BUILT_IN_SNPRINTF_CHK
:
6385 case BUILT_IN_VSNPRINTF_CHK
:
6386 maybe_emit_chk_warning (exp
, fcode
);
6389 case BUILT_IN_SPRINTF_CHK
:
6390 case BUILT_IN_VSPRINTF_CHK
:
6391 maybe_emit_sprintf_chk_warning (exp
, fcode
);
6394 default: /* just do library call, if unknown builtin */
6398 /* The switch statement above can drop through to cause the function
6399 to be called normally. */
6400 return expand_call (exp
, target
, ignore
);
6403 /* Determine whether a tree node represents a call to a built-in
6404 function. If the tree T is a call to a built-in function with
6405 the right number of arguments of the appropriate types, return
6406 the DECL_FUNCTION_CODE of the call, e.g. BUILT_IN_SQRT.
6407 Otherwise the return value is END_BUILTINS. */
6409 enum built_in_function
6410 builtin_mathfn_code (tree t
)
6412 tree fndecl
, arglist
, parmlist
;
6413 tree argtype
, parmtype
;
6415 if (TREE_CODE (t
) != CALL_EXPR
6416 || TREE_CODE (TREE_OPERAND (t
, 0)) != ADDR_EXPR
)
6417 return END_BUILTINS
;
6419 fndecl
= get_callee_fndecl (t
);
6420 if (fndecl
== NULL_TREE
6421 || TREE_CODE (fndecl
) != FUNCTION_DECL
6422 || ! DECL_BUILT_IN (fndecl
)
6423 || DECL_BUILT_IN_CLASS (fndecl
) == BUILT_IN_MD
)
6424 return END_BUILTINS
;
6426 arglist
= TREE_OPERAND (t
, 1);
6427 parmlist
= TYPE_ARG_TYPES (TREE_TYPE (fndecl
));
6428 for (; parmlist
; parmlist
= TREE_CHAIN (parmlist
))
6430 /* If a function doesn't take a variable number of arguments,
6431 the last element in the list will have type `void'. */
6432 parmtype
= TREE_VALUE (parmlist
);
6433 if (VOID_TYPE_P (parmtype
))
6436 return END_BUILTINS
;
6437 return DECL_FUNCTION_CODE (fndecl
);
6441 return END_BUILTINS
;
6443 argtype
= TREE_TYPE (TREE_VALUE (arglist
));
6445 if (SCALAR_FLOAT_TYPE_P (parmtype
))
6447 if (! SCALAR_FLOAT_TYPE_P (argtype
))
6448 return END_BUILTINS
;
6450 else if (COMPLEX_FLOAT_TYPE_P (parmtype
))
6452 if (! COMPLEX_FLOAT_TYPE_P (argtype
))
6453 return END_BUILTINS
;
6455 else if (POINTER_TYPE_P (parmtype
))
6457 if (! POINTER_TYPE_P (argtype
))
6458 return END_BUILTINS
;
6460 else if (INTEGRAL_TYPE_P (parmtype
))
6462 if (! INTEGRAL_TYPE_P (argtype
))
6463 return END_BUILTINS
;
6466 return END_BUILTINS
;
6468 arglist
= TREE_CHAIN (arglist
);
6471 /* Variable-length argument list. */
6472 return DECL_FUNCTION_CODE (fndecl
);
6475 /* Fold a call to __builtin_constant_p, if we know it will evaluate to a
6476 constant. ARGLIST is the argument list of the call. */
6479 fold_builtin_constant_p (tree arglist
)
6484 arglist
= TREE_VALUE (arglist
);
6486 /* We return 1 for a numeric type that's known to be a constant
6487 value at compile-time or for an aggregate type that's a
6488 literal constant. */
6489 STRIP_NOPS (arglist
);
6491 /* If we know this is a constant, emit the constant of one. */
6492 if (CONSTANT_CLASS_P (arglist
)
6493 || (TREE_CODE (arglist
) == CONSTRUCTOR
6494 && TREE_CONSTANT (arglist
)))
6495 return integer_one_node
;
6496 if (TREE_CODE (arglist
) == ADDR_EXPR
)
6498 tree op
= TREE_OPERAND (arglist
, 0);
6499 if (TREE_CODE (op
) == STRING_CST
6500 || (TREE_CODE (op
) == ARRAY_REF
6501 && integer_zerop (TREE_OPERAND (op
, 1))
6502 && TREE_CODE (TREE_OPERAND (op
, 0)) == STRING_CST
))
6503 return integer_one_node
;
6506 /* If this expression has side effects, show we don't know it to be a
6507 constant. Likewise if it's a pointer or aggregate type since in
6508 those case we only want literals, since those are only optimized
6509 when generating RTL, not later.
6510 And finally, if we are compiling an initializer, not code, we
6511 need to return a definite result now; there's not going to be any
6512 more optimization done. */
6513 if (TREE_SIDE_EFFECTS (arglist
)
6514 || AGGREGATE_TYPE_P (TREE_TYPE (arglist
))
6515 || POINTER_TYPE_P (TREE_TYPE (arglist
))
6517 return integer_zero_node
;
6522 /* Fold a call to __builtin_expect, if we expect that a comparison against
6523 the argument will fold to a constant. In practice, this means a true
6524 constant or the address of a non-weak symbol. ARGLIST is the argument
6525 list of the call. */
6528 fold_builtin_expect (tree arglist
)
6535 arg
= TREE_VALUE (arglist
);
6537 /* If the argument isn't invariant, then there's nothing we can do. */
6538 if (!TREE_INVARIANT (arg
))
6541 /* If we're looking at an address of a weak decl, then do not fold. */
6544 if (TREE_CODE (inner
) == ADDR_EXPR
)
6548 inner
= TREE_OPERAND (inner
, 0);
6550 while (TREE_CODE (inner
) == COMPONENT_REF
6551 || TREE_CODE (inner
) == ARRAY_REF
);
6552 if (DECL_P (inner
) && DECL_WEAK (inner
))
6556 /* Otherwise, ARG already has the proper type for the return value. */
6560 /* Fold a call to __builtin_classify_type. */
6563 fold_builtin_classify_type (tree arglist
)
6566 return build_int_cst (NULL_TREE
, no_type_class
);
6568 return build_int_cst (NULL_TREE
,
6569 type_to_class (TREE_TYPE (TREE_VALUE (arglist
))));
6572 /* Fold a call to __builtin_strlen. */
6575 fold_builtin_strlen (tree arglist
)
6577 if (!validate_arglist (arglist
, POINTER_TYPE
, VOID_TYPE
))
6581 tree len
= c_strlen (TREE_VALUE (arglist
), 0);
6585 /* Convert from the internal "sizetype" type to "size_t". */
6587 len
= fold_convert (size_type_node
, len
);
6595 /* Fold a call to __builtin_inf or __builtin_huge_val. */
6598 fold_builtin_inf (tree type
, int warn
)
6600 REAL_VALUE_TYPE real
;
6602 /* __builtin_inff is intended to be usable to define INFINITY on all
6603 targets. If an infinity is not available, INFINITY expands "to a
6604 positive constant of type float that overflows at translation
6605 time", footnote "In this case, using INFINITY will violate the
6606 constraint in 6.4.4 and thus require a diagnostic." (C99 7.12#4).
6607 Thus we pedwarn to ensure this constraint violation is
6609 if (!MODE_HAS_INFINITIES (TYPE_MODE (type
)) && warn
)
6610 pedwarn ("target format does not support infinity");
6613 return build_real (type
, real
);
6616 /* Fold a call to __builtin_nan or __builtin_nans. */
6619 fold_builtin_nan (tree arglist
, tree type
, int quiet
)
6621 REAL_VALUE_TYPE real
;
6624 if (!validate_arglist (arglist
, POINTER_TYPE
, VOID_TYPE
))
6626 str
= c_getstr (TREE_VALUE (arglist
));
6630 if (!real_nan (&real
, str
, quiet
, TYPE_MODE (type
)))
6633 return build_real (type
, real
);
6636 /* Return true if the floating point expression T has an integer value.
6637 We also allow +Inf, -Inf and NaN to be considered integer values. */
6640 integer_valued_real_p (tree t
)
6642 switch (TREE_CODE (t
))
6649 case NON_LVALUE_EXPR
:
6650 return integer_valued_real_p (TREE_OPERAND (t
, 0));
6655 return integer_valued_real_p (TREE_OPERAND (t
, 1));
6662 return integer_valued_real_p (TREE_OPERAND (t
, 0))
6663 && integer_valued_real_p (TREE_OPERAND (t
, 1));
6666 return integer_valued_real_p (TREE_OPERAND (t
, 1))
6667 && integer_valued_real_p (TREE_OPERAND (t
, 2));
6670 if (! TREE_CONSTANT_OVERFLOW (t
))
6672 REAL_VALUE_TYPE c
, cint
;
6674 c
= TREE_REAL_CST (t
);
6675 real_trunc (&cint
, TYPE_MODE (TREE_TYPE (t
)), &c
);
6676 return real_identical (&c
, &cint
);
6681 tree type
= TREE_TYPE (TREE_OPERAND (t
, 0));
6682 if (TREE_CODE (type
) == INTEGER_TYPE
)
6684 if (TREE_CODE (type
) == REAL_TYPE
)
6685 return integer_valued_real_p (TREE_OPERAND (t
, 0));
6690 switch (builtin_mathfn_code (t
))
6693 case BUILT_IN_CEILF
:
6694 case BUILT_IN_CEILL
:
6695 case BUILT_IN_FLOOR
:
6696 case BUILT_IN_FLOORF
:
6697 case BUILT_IN_FLOORL
:
6698 case BUILT_IN_NEARBYINT
:
6699 case BUILT_IN_NEARBYINTF
:
6700 case BUILT_IN_NEARBYINTL
:
6702 case BUILT_IN_RINTF
:
6703 case BUILT_IN_RINTL
:
6704 case BUILT_IN_ROUND
:
6705 case BUILT_IN_ROUNDF
:
6706 case BUILT_IN_ROUNDL
:
6707 case BUILT_IN_TRUNC
:
6708 case BUILT_IN_TRUNCF
:
6709 case BUILT_IN_TRUNCL
:
6723 /* EXP is assumed to be builtin call where truncation can be propagated
6724 across (for instance floor((double)f) == (double)floorf (f).
6725 Do the transformation. */
6728 fold_trunc_transparent_mathfn (tree fndecl
, tree arglist
)
6730 enum built_in_function fcode
= DECL_FUNCTION_CODE (fndecl
);
6733 if (! validate_arglist (arglist
, REAL_TYPE
, VOID_TYPE
))
6736 arg
= TREE_VALUE (arglist
);
6737 /* Integer rounding functions are idempotent. */
6738 if (fcode
== builtin_mathfn_code (arg
))
6741 /* If argument is already integer valued, and we don't need to worry
6742 about setting errno, there's no need to perform rounding. */
6743 if (! flag_errno_math
&& integer_valued_real_p (arg
))
6748 tree arg0
= strip_float_extensions (arg
);
6749 tree ftype
= TREE_TYPE (TREE_TYPE (fndecl
));
6750 tree newtype
= TREE_TYPE (arg0
);
6753 if (TYPE_PRECISION (newtype
) < TYPE_PRECISION (ftype
)
6754 && (decl
= mathfn_built_in (newtype
, fcode
)))
6757 build_tree_list (NULL_TREE
, fold_convert (newtype
, arg0
));
6758 return fold_convert (ftype
,
6759 build_function_call_expr (decl
, arglist
));
6765 /* EXP is assumed to be builtin call which can narrow the FP type of
6766 the argument, for instance lround((double)f) -> lroundf (f). */
6769 fold_fixed_mathfn (tree fndecl
, tree arglist
)
6771 enum built_in_function fcode
= DECL_FUNCTION_CODE (fndecl
);
6774 if (! validate_arglist (arglist
, REAL_TYPE
, VOID_TYPE
))
6777 arg
= TREE_VALUE (arglist
);
6779 /* If argument is already integer valued, and we don't need to worry
6780 about setting errno, there's no need to perform rounding. */
6781 if (! flag_errno_math
&& integer_valued_real_p (arg
))
6782 return fold_build1 (FIX_TRUNC_EXPR
, TREE_TYPE (TREE_TYPE (fndecl
)), arg
);
6786 tree ftype
= TREE_TYPE (arg
);
6787 tree arg0
= strip_float_extensions (arg
);
6788 tree newtype
= TREE_TYPE (arg0
);
6791 if (TYPE_PRECISION (newtype
) < TYPE_PRECISION (ftype
)
6792 && (decl
= mathfn_built_in (newtype
, fcode
)))
6795 build_tree_list (NULL_TREE
, fold_convert (newtype
, arg0
));
6796 return build_function_call_expr (decl
, arglist
);
6802 /* Fold function call to builtin cabs, cabsf or cabsl. ARGLIST
6803 is the argument list and TYPE is the return type. Return
6804 NULL_TREE if no if no simplification can be made. */
6807 fold_builtin_cabs (tree arglist
, tree type
)
6811 if (!arglist
|| TREE_CHAIN (arglist
))
6814 arg
= TREE_VALUE (arglist
);
6815 if (TREE_CODE (TREE_TYPE (arg
)) != COMPLEX_TYPE
6816 || TREE_CODE (TREE_TYPE (TREE_TYPE (arg
))) != REAL_TYPE
)
6819 /* Evaluate cabs of a constant at compile-time. */
6820 if (flag_unsafe_math_optimizations
6821 && TREE_CODE (arg
) == COMPLEX_CST
6822 && TREE_CODE (TREE_REALPART (arg
)) == REAL_CST
6823 && TREE_CODE (TREE_IMAGPART (arg
)) == REAL_CST
6824 && ! TREE_CONSTANT_OVERFLOW (TREE_REALPART (arg
))
6825 && ! TREE_CONSTANT_OVERFLOW (TREE_IMAGPART (arg
)))
6827 REAL_VALUE_TYPE r
, i
;
6829 r
= TREE_REAL_CST (TREE_REALPART (arg
));
6830 i
= TREE_REAL_CST (TREE_IMAGPART (arg
));
6832 real_arithmetic (&r
, MULT_EXPR
, &r
, &r
);
6833 real_arithmetic (&i
, MULT_EXPR
, &i
, &i
);
6834 real_arithmetic (&r
, PLUS_EXPR
, &r
, &i
);
6835 if (real_sqrt (&r
, TYPE_MODE (type
), &r
)
6836 || ! flag_trapping_math
)
6837 return build_real (type
, r
);
6840 /* If either part is zero, cabs is fabs of the other. */
6841 if (TREE_CODE (arg
) == COMPLEX_EXPR
6842 && real_zerop (TREE_OPERAND (arg
, 0)))
6843 return fold_build1 (ABS_EXPR
, type
, TREE_OPERAND (arg
, 1));
6844 if (TREE_CODE (arg
) == COMPLEX_EXPR
6845 && real_zerop (TREE_OPERAND (arg
, 1)))
6846 return fold_build1 (ABS_EXPR
, type
, TREE_OPERAND (arg
, 0));
6848 /* Don't do this when optimizing for size. */
6849 if (flag_unsafe_math_optimizations
6850 && optimize
&& !optimize_size
)
6852 tree sqrtfn
= mathfn_built_in (type
, BUILT_IN_SQRT
);
6854 if (sqrtfn
!= NULL_TREE
)
6856 tree rpart
, ipart
, result
, arglist
;
6858 arg
= builtin_save_expr (arg
);
6860 rpart
= fold_build1 (REALPART_EXPR
, type
, arg
);
6861 ipart
= fold_build1 (IMAGPART_EXPR
, type
, arg
);
6863 rpart
= builtin_save_expr (rpart
);
6864 ipart
= builtin_save_expr (ipart
);
6866 result
= fold_build2 (PLUS_EXPR
, type
,
6867 fold_build2 (MULT_EXPR
, type
,
6869 fold_build2 (MULT_EXPR
, type
,
6872 arglist
= build_tree_list (NULL_TREE
, result
);
6873 return build_function_call_expr (sqrtfn
, arglist
);
6880 /* Fold a builtin function call to sqrt, sqrtf, or sqrtl. Return
6881 NULL_TREE if no simplification can be made. */
6884 fold_builtin_sqrt (tree arglist
, tree type
)
6887 enum built_in_function fcode
;
6888 tree arg
= TREE_VALUE (arglist
);
6890 if (!validate_arglist (arglist
, REAL_TYPE
, VOID_TYPE
))
6893 /* Optimize sqrt of constant value. */
6894 if (TREE_CODE (arg
) == REAL_CST
6895 && ! TREE_CONSTANT_OVERFLOW (arg
))
6897 REAL_VALUE_TYPE r
, x
;
6899 x
= TREE_REAL_CST (arg
);
6900 if (real_sqrt (&r
, TYPE_MODE (type
), &x
)
6901 || (!flag_trapping_math
&& !flag_errno_math
))
6902 return build_real (type
, r
);
6905 /* Optimize sqrt(expN(x)) = expN(x*0.5). */
6906 fcode
= builtin_mathfn_code (arg
);
6907 if (flag_unsafe_math_optimizations
&& BUILTIN_EXPONENT_P (fcode
))
6909 tree expfn
= TREE_OPERAND (TREE_OPERAND (arg
, 0), 0);
6910 arg
= fold_build2 (MULT_EXPR
, type
,
6911 TREE_VALUE (TREE_OPERAND (arg
, 1)),
6912 build_real (type
, dconsthalf
));
6913 arglist
= build_tree_list (NULL_TREE
, arg
);
6914 return build_function_call_expr (expfn
, arglist
);
6917 /* Optimize sqrt(Nroot(x)) -> pow(x,1/(2*N)). */
6918 if (flag_unsafe_math_optimizations
&& BUILTIN_ROOT_P (fcode
))
6920 tree powfn
= mathfn_built_in (type
, BUILT_IN_POW
);
6924 tree arg0
= TREE_VALUE (TREE_OPERAND (arg
, 1));
6926 /* The inner root was either sqrt or cbrt. */
6927 REAL_VALUE_TYPE dconstroot
=
6928 BUILTIN_SQRT_P (fcode
) ? dconsthalf
: dconstthird
;
6930 /* Adjust for the outer root. */
6931 SET_REAL_EXP (&dconstroot
, REAL_EXP (&dconstroot
) - 1);
6932 dconstroot
= real_value_truncate (TYPE_MODE (type
), dconstroot
);
6933 tree_root
= build_real (type
, dconstroot
);
6934 arglist
= tree_cons (NULL_TREE
, arg0
,
6935 build_tree_list (NULL_TREE
, tree_root
));
6936 return build_function_call_expr (powfn
, arglist
);
6940 /* Optimize sqrt(pow(x,y)) = pow(|x|,y*0.5). */
6941 if (flag_unsafe_math_optimizations
6942 && (fcode
== BUILT_IN_POW
6943 || fcode
== BUILT_IN_POWF
6944 || fcode
== BUILT_IN_POWL
))
6946 tree powfn
= TREE_OPERAND (TREE_OPERAND (arg
, 0), 0);
6947 tree arg0
= TREE_VALUE (TREE_OPERAND (arg
, 1));
6948 tree arg1
= TREE_VALUE (TREE_CHAIN (TREE_OPERAND (arg
, 1)));
6950 if (!tree_expr_nonnegative_p (arg0
))
6951 arg0
= build1 (ABS_EXPR
, type
, arg0
);
6952 narg1
= fold_build2 (MULT_EXPR
, type
, arg1
,
6953 build_real (type
, dconsthalf
));
6954 arglist
= tree_cons (NULL_TREE
, arg0
,
6955 build_tree_list (NULL_TREE
, narg1
));
6956 return build_function_call_expr (powfn
, arglist
);
6962 /* Fold a builtin function call to cbrt, cbrtf, or cbrtl. Return
6963 NULL_TREE if no simplification can be made. */
6965 fold_builtin_cbrt (tree arglist
, tree type
)
6967 tree arg
= TREE_VALUE (arglist
);
6968 const enum built_in_function fcode
= builtin_mathfn_code (arg
);
6970 if (!validate_arglist (arglist
, REAL_TYPE
, VOID_TYPE
))
6973 /* Optimize cbrt of constant value. */
6974 if (real_zerop (arg
) || real_onep (arg
) || real_minus_onep (arg
))
6977 if (flag_unsafe_math_optimizations
)
6979 /* Optimize cbrt(expN(x)) -> expN(x/3). */
6980 if (BUILTIN_EXPONENT_P (fcode
))
6982 tree expfn
= TREE_OPERAND (TREE_OPERAND (arg
, 0), 0);
6983 const REAL_VALUE_TYPE third_trunc
=
6984 real_value_truncate (TYPE_MODE (type
), dconstthird
);
6985 arg
= fold_build2 (MULT_EXPR
, type
,
6986 TREE_VALUE (TREE_OPERAND (arg
, 1)),
6987 build_real (type
, third_trunc
));
6988 arglist
= build_tree_list (NULL_TREE
, arg
);
6989 return build_function_call_expr (expfn
, arglist
);
6992 /* Optimize cbrt(sqrt(x)) -> pow(x,1/6). */
6993 if (BUILTIN_SQRT_P (fcode
))
6995 tree powfn
= mathfn_built_in (type
, BUILT_IN_POW
);
6999 tree arg0
= TREE_VALUE (TREE_OPERAND (arg
, 1));
7001 REAL_VALUE_TYPE dconstroot
= dconstthird
;
7003 SET_REAL_EXP (&dconstroot
, REAL_EXP (&dconstroot
) - 1);
7004 dconstroot
= real_value_truncate (TYPE_MODE (type
), dconstroot
);
7005 tree_root
= build_real (type
, dconstroot
);
7006 arglist
= tree_cons (NULL_TREE
, arg0
,
7007 build_tree_list (NULL_TREE
, tree_root
));
7008 return build_function_call_expr (powfn
, arglist
);
7012 /* Optimize cbrt(cbrt(x)) -> pow(x,1/9) iff x is nonnegative. */
7013 if (BUILTIN_CBRT_P (fcode
))
7015 tree arg0
= TREE_VALUE (TREE_OPERAND (arg
, 1));
7016 if (tree_expr_nonnegative_p (arg0
))
7018 tree powfn
= mathfn_built_in (type
, BUILT_IN_POW
);
7023 REAL_VALUE_TYPE dconstroot
;
7025 real_arithmetic (&dconstroot
, MULT_EXPR
, &dconstthird
, &dconstthird
);
7026 dconstroot
= real_value_truncate (TYPE_MODE (type
), dconstroot
);
7027 tree_root
= build_real (type
, dconstroot
);
7028 arglist
= tree_cons (NULL_TREE
, arg0
,
7029 build_tree_list (NULL_TREE
, tree_root
));
7030 return build_function_call_expr (powfn
, arglist
);
7035 /* Optimize cbrt(pow(x,y)) -> pow(x,y/3) iff x is nonnegative. */
7036 if (fcode
== BUILT_IN_POW
|| fcode
== BUILT_IN_POWF
7037 || fcode
== BUILT_IN_POWL
)
7039 tree arg00
= TREE_VALUE (TREE_OPERAND (arg
, 1));
7040 tree arg01
= TREE_VALUE (TREE_CHAIN (TREE_OPERAND (arg
, 1)));
7041 if (tree_expr_nonnegative_p (arg00
))
7043 tree powfn
= TREE_OPERAND (TREE_OPERAND (arg
, 0), 0);
7044 const REAL_VALUE_TYPE dconstroot
7045 = real_value_truncate (TYPE_MODE (type
), dconstthird
);
7046 tree narg01
= fold_build2 (MULT_EXPR
, type
, arg01
,
7047 build_real (type
, dconstroot
));
7048 arglist
= tree_cons (NULL_TREE
, arg00
,
7049 build_tree_list (NULL_TREE
, narg01
));
7050 return build_function_call_expr (powfn
, arglist
);
7057 /* Fold function call to builtin sin, sinf, or sinl. Return
7058 NULL_TREE if no simplification can be made. */
7060 fold_builtin_sin (tree arglist
)
7062 tree arg
= TREE_VALUE (arglist
);
7064 if (!validate_arglist (arglist
, REAL_TYPE
, VOID_TYPE
))
7067 /* Optimize sin (0.0) = 0.0. */
7068 if (real_zerop (arg
))
7074 /* Fold function call to builtin cos, cosf, or cosl. Return
7075 NULL_TREE if no simplification can be made. */
7077 fold_builtin_cos (tree arglist
, tree type
, tree fndecl
)
7079 tree arg
= TREE_VALUE (arglist
);
7081 if (!validate_arglist (arglist
, REAL_TYPE
, VOID_TYPE
))
7084 /* Optimize cos (0.0) = 1.0. */
7085 if (real_zerop (arg
))
7086 return build_real (type
, dconst1
);
7088 /* Optimize cos(-x) into cos (x). */
7089 if (TREE_CODE (arg
) == NEGATE_EXPR
)
7091 tree args
= build_tree_list (NULL_TREE
,
7092 TREE_OPERAND (arg
, 0));
7093 return build_function_call_expr (fndecl
, args
);
7099 /* Fold function call to builtin tan, tanf, or tanl. Return
7100 NULL_TREE if no simplification can be made. */
7102 fold_builtin_tan (tree arglist
)
7104 enum built_in_function fcode
;
7105 tree arg
= TREE_VALUE (arglist
);
7107 if (!validate_arglist (arglist
, REAL_TYPE
, VOID_TYPE
))
7110 /* Optimize tan(0.0) = 0.0. */
7111 if (real_zerop (arg
))
7114 /* Optimize tan(atan(x)) = x. */
7115 fcode
= builtin_mathfn_code (arg
);
7116 if (flag_unsafe_math_optimizations
7117 && (fcode
== BUILT_IN_ATAN
7118 || fcode
== BUILT_IN_ATANF
7119 || fcode
== BUILT_IN_ATANL
))
7120 return TREE_VALUE (TREE_OPERAND (arg
, 1));
7125 /* Fold function call to builtin atan, atanf, or atanl. Return
7126 NULL_TREE if no simplification can be made. */
7129 fold_builtin_atan (tree arglist
, tree type
)
7132 tree arg
= TREE_VALUE (arglist
);
7134 if (!validate_arglist (arglist
, REAL_TYPE
, VOID_TYPE
))
7137 /* Optimize atan(0.0) = 0.0. */
7138 if (real_zerop (arg
))
7141 /* Optimize atan(1.0) = pi/4. */
7142 if (real_onep (arg
))
7144 REAL_VALUE_TYPE cst
;
7146 real_convert (&cst
, TYPE_MODE (type
), &dconstpi
);
7147 SET_REAL_EXP (&cst
, REAL_EXP (&cst
) - 2);
7148 return build_real (type
, cst
);
7154 /* Fold function call to builtin trunc, truncf or truncl. Return
7155 NULL_TREE if no simplification can be made. */
7158 fold_builtin_trunc (tree fndecl
, tree arglist
)
7162 if (! validate_arglist (arglist
, REAL_TYPE
, VOID_TYPE
))
7165 /* Optimize trunc of constant value. */
7166 arg
= TREE_VALUE (arglist
);
7167 if (TREE_CODE (arg
) == REAL_CST
&& ! TREE_CONSTANT_OVERFLOW (arg
))
7169 REAL_VALUE_TYPE r
, x
;
7170 tree type
= TREE_TYPE (TREE_TYPE (fndecl
));
7172 x
= TREE_REAL_CST (arg
);
7173 real_trunc (&r
, TYPE_MODE (type
), &x
);
7174 return build_real (type
, r
);
7177 return fold_trunc_transparent_mathfn (fndecl
, arglist
);
7180 /* Fold function call to builtin floor, floorf or floorl. Return
7181 NULL_TREE if no simplification can be made. */
7184 fold_builtin_floor (tree fndecl
, tree arglist
)
7188 if (! validate_arglist (arglist
, REAL_TYPE
, VOID_TYPE
))
7191 /* Optimize floor of constant value. */
7192 arg
= TREE_VALUE (arglist
);
7193 if (TREE_CODE (arg
) == REAL_CST
&& ! TREE_CONSTANT_OVERFLOW (arg
))
7197 x
= TREE_REAL_CST (arg
);
7198 if (! REAL_VALUE_ISNAN (x
) || ! flag_errno_math
)
7200 tree type
= TREE_TYPE (TREE_TYPE (fndecl
));
7203 real_floor (&r
, TYPE_MODE (type
), &x
);
7204 return build_real (type
, r
);
7208 return fold_trunc_transparent_mathfn (fndecl
, arglist
);
7211 /* Fold function call to builtin ceil, ceilf or ceill. Return
7212 NULL_TREE if no simplification can be made. */
7215 fold_builtin_ceil (tree fndecl
, tree arglist
)
7219 if (! validate_arglist (arglist
, REAL_TYPE
, VOID_TYPE
))
7222 /* Optimize ceil of constant value. */
7223 arg
= TREE_VALUE (arglist
);
7224 if (TREE_CODE (arg
) == REAL_CST
&& ! TREE_CONSTANT_OVERFLOW (arg
))
7228 x
= TREE_REAL_CST (arg
);
7229 if (! REAL_VALUE_ISNAN (x
) || ! flag_errno_math
)
7231 tree type
= TREE_TYPE (TREE_TYPE (fndecl
));
7234 real_ceil (&r
, TYPE_MODE (type
), &x
);
7235 return build_real (type
, r
);
7239 return fold_trunc_transparent_mathfn (fndecl
, arglist
);
7242 /* Fold function call to builtin round, roundf or roundl. Return
7243 NULL_TREE if no simplification can be made. */
7246 fold_builtin_round (tree fndecl
, tree arglist
)
7250 if (! validate_arglist (arglist
, REAL_TYPE
, VOID_TYPE
))
7253 /* Optimize round of constant value. */
7254 arg
= TREE_VALUE (arglist
);
7255 if (TREE_CODE (arg
) == REAL_CST
&& ! TREE_CONSTANT_OVERFLOW (arg
))
7259 x
= TREE_REAL_CST (arg
);
7260 if (! REAL_VALUE_ISNAN (x
) || ! flag_errno_math
)
7262 tree type
= TREE_TYPE (TREE_TYPE (fndecl
));
7265 real_round (&r
, TYPE_MODE (type
), &x
);
7266 return build_real (type
, r
);
7270 return fold_trunc_transparent_mathfn (fndecl
, arglist
);
7273 /* Fold function call to builtin lround, lroundf or lroundl (or the
7274 corresponding long long versions) and other rounding functions.
7275 Return NULL_TREE if no simplification can be made. */
7278 fold_builtin_int_roundingfn (tree fndecl
, tree arglist
)
7282 if (! validate_arglist (arglist
, REAL_TYPE
, VOID_TYPE
))
7285 /* Optimize lround of constant value. */
7286 arg
= TREE_VALUE (arglist
);
7287 if (TREE_CODE (arg
) == REAL_CST
&& ! TREE_CONSTANT_OVERFLOW (arg
))
7289 const REAL_VALUE_TYPE x
= TREE_REAL_CST (arg
);
7291 if (! REAL_VALUE_ISNAN (x
) && ! REAL_VALUE_ISINF (x
))
7293 tree itype
= TREE_TYPE (TREE_TYPE (fndecl
));
7294 tree ftype
= TREE_TYPE (arg
), result
;
7295 HOST_WIDE_INT hi
, lo
;
7298 switch (DECL_FUNCTION_CODE (fndecl
))
7300 case BUILT_IN_LFLOOR
:
7301 case BUILT_IN_LFLOORF
:
7302 case BUILT_IN_LFLOORL
:
7303 case BUILT_IN_LLFLOOR
:
7304 case BUILT_IN_LLFLOORF
:
7305 case BUILT_IN_LLFLOORL
:
7306 real_floor (&r
, TYPE_MODE (ftype
), &x
);
7309 case BUILT_IN_LCEIL
:
7310 case BUILT_IN_LCEILF
:
7311 case BUILT_IN_LCEILL
:
7312 case BUILT_IN_LLCEIL
:
7313 case BUILT_IN_LLCEILF
:
7314 case BUILT_IN_LLCEILL
:
7315 real_ceil (&r
, TYPE_MODE (ftype
), &x
);
7318 case BUILT_IN_LROUND
:
7319 case BUILT_IN_LROUNDF
:
7320 case BUILT_IN_LROUNDL
:
7321 case BUILT_IN_LLROUND
:
7322 case BUILT_IN_LLROUNDF
:
7323 case BUILT_IN_LLROUNDL
:
7324 real_round (&r
, TYPE_MODE (ftype
), &x
);
7331 REAL_VALUE_TO_INT (&lo
, &hi
, r
);
7332 result
= build_int_cst_wide (NULL_TREE
, lo
, hi
);
7333 if (int_fits_type_p (result
, itype
))
7334 return fold_convert (itype
, result
);
7338 return fold_fixed_mathfn (fndecl
, arglist
);
7341 /* Fold function call to builtin ffs, clz, ctz, popcount and parity
7342 and their long and long long variants (i.e. ffsl and ffsll).
7343 Return NULL_TREE if no simplification can be made. */
7346 fold_builtin_bitop (tree fndecl
, tree arglist
)
7350 if (! validate_arglist (arglist
, INTEGER_TYPE
, VOID_TYPE
))
7353 /* Optimize for constant argument. */
7354 arg
= TREE_VALUE (arglist
);
7355 if (TREE_CODE (arg
) == INTEGER_CST
&& ! TREE_CONSTANT_OVERFLOW (arg
))
7357 HOST_WIDE_INT hi
, width
, result
;
7358 unsigned HOST_WIDE_INT lo
;
7361 type
= TREE_TYPE (arg
);
7362 width
= TYPE_PRECISION (type
);
7363 lo
= TREE_INT_CST_LOW (arg
);
7365 /* Clear all the bits that are beyond the type's precision. */
7366 if (width
> HOST_BITS_PER_WIDE_INT
)
7368 hi
= TREE_INT_CST_HIGH (arg
);
7369 if (width
< 2 * HOST_BITS_PER_WIDE_INT
)
7370 hi
&= ~((HOST_WIDE_INT
) (-1) >> (width
- HOST_BITS_PER_WIDE_INT
));
7375 if (width
< HOST_BITS_PER_WIDE_INT
)
7376 lo
&= ~((unsigned HOST_WIDE_INT
) (-1) << width
);
7379 switch (DECL_FUNCTION_CODE (fndecl
))
7383 case BUILT_IN_FFSLL
:
7385 result
= exact_log2 (lo
& -lo
) + 1;
7387 result
= HOST_BITS_PER_WIDE_INT
+ exact_log2 (hi
& -hi
) + 1;
7394 case BUILT_IN_CLZLL
:
7396 result
= width
- floor_log2 (hi
) - 1 - HOST_BITS_PER_WIDE_INT
;
7398 result
= width
- floor_log2 (lo
) - 1;
7399 else if (! CLZ_DEFINED_VALUE_AT_ZERO (TYPE_MODE (type
), result
))
7405 case BUILT_IN_CTZLL
:
7407 result
= exact_log2 (lo
& -lo
);
7409 result
= HOST_BITS_PER_WIDE_INT
+ exact_log2 (hi
& -hi
);
7410 else if (! CTZ_DEFINED_VALUE_AT_ZERO (TYPE_MODE (type
), result
))
7414 case BUILT_IN_POPCOUNT
:
7415 case BUILT_IN_POPCOUNTL
:
7416 case BUILT_IN_POPCOUNTLL
:
7419 result
++, lo
&= lo
- 1;
7421 result
++, hi
&= hi
- 1;
7424 case BUILT_IN_PARITY
:
7425 case BUILT_IN_PARITYL
:
7426 case BUILT_IN_PARITYLL
:
7429 result
++, lo
&= lo
- 1;
7431 result
++, hi
&= hi
- 1;
7439 return build_int_cst (TREE_TYPE (TREE_TYPE (fndecl
)), result
);
7445 /* Return true if EXPR is the real constant contained in VALUE. */
7448 real_dconstp (tree expr
, const REAL_VALUE_TYPE
*value
)
7452 return ((TREE_CODE (expr
) == REAL_CST
7453 && ! TREE_CONSTANT_OVERFLOW (expr
)
7454 && REAL_VALUES_EQUAL (TREE_REAL_CST (expr
), *value
))
7455 || (TREE_CODE (expr
) == COMPLEX_CST
7456 && real_dconstp (TREE_REALPART (expr
), value
)
7457 && real_zerop (TREE_IMAGPART (expr
))));
7460 /* A subroutine of fold_builtin to fold the various logarithmic
7461 functions. EXP is the CALL_EXPR of a call to a builtin logN
7462 function. VALUE is the base of the logN function. */
7465 fold_builtin_logarithm (tree fndecl
, tree arglist
,
7466 const REAL_VALUE_TYPE
*value
)
7468 if (validate_arglist (arglist
, REAL_TYPE
, VOID_TYPE
))
7470 tree type
= TREE_TYPE (TREE_TYPE (fndecl
));
7471 tree arg
= TREE_VALUE (arglist
);
7472 const enum built_in_function fcode
= builtin_mathfn_code (arg
);
7474 /* Optimize logN(1.0) = 0.0. */
7475 if (real_onep (arg
))
7476 return build_real (type
, dconst0
);
7478 /* Optimize logN(N) = 1.0. If N can't be truncated to MODE
7479 exactly, then only do this if flag_unsafe_math_optimizations. */
7480 if (exact_real_truncate (TYPE_MODE (type
), value
)
7481 || flag_unsafe_math_optimizations
)
7483 const REAL_VALUE_TYPE value_truncate
=
7484 real_value_truncate (TYPE_MODE (type
), *value
);
7485 if (real_dconstp (arg
, &value_truncate
))
7486 return build_real (type
, dconst1
);
7489 /* Special case, optimize logN(expN(x)) = x. */
7490 if (flag_unsafe_math_optimizations
7491 && ((value
== &dconste
7492 && (fcode
== BUILT_IN_EXP
7493 || fcode
== BUILT_IN_EXPF
7494 || fcode
== BUILT_IN_EXPL
))
7495 || (value
== &dconst2
7496 && (fcode
== BUILT_IN_EXP2
7497 || fcode
== BUILT_IN_EXP2F
7498 || fcode
== BUILT_IN_EXP2L
))
7499 || (value
== &dconst10
&& (BUILTIN_EXP10_P (fcode
)))))
7500 return fold_convert (type
, TREE_VALUE (TREE_OPERAND (arg
, 1)));
7502 /* Optimize logN(func()) for various exponential functions. We
7503 want to determine the value "x" and the power "exponent" in
7504 order to transform logN(x**exponent) into exponent*logN(x). */
7505 if (flag_unsafe_math_optimizations
)
7507 tree exponent
= 0, x
= 0;
7514 /* Prepare to do logN(exp(exponent) -> exponent*logN(e). */
7515 x
= build_real (type
,
7516 real_value_truncate (TYPE_MODE (type
), dconste
));
7517 exponent
= TREE_VALUE (TREE_OPERAND (arg
, 1));
7520 case BUILT_IN_EXP2F
:
7521 case BUILT_IN_EXP2L
:
7522 /* Prepare to do logN(exp2(exponent) -> exponent*logN(2). */
7523 x
= build_real (type
, dconst2
);
7524 exponent
= TREE_VALUE (TREE_OPERAND (arg
, 1));
7526 case BUILT_IN_EXP10
:
7527 case BUILT_IN_EXP10F
:
7528 case BUILT_IN_EXP10L
:
7529 case BUILT_IN_POW10
:
7530 case BUILT_IN_POW10F
:
7531 case BUILT_IN_POW10L
:
7532 /* Prepare to do logN(exp10(exponent) -> exponent*logN(10). */
7533 x
= build_real (type
, dconst10
);
7534 exponent
= TREE_VALUE (TREE_OPERAND (arg
, 1));
7537 case BUILT_IN_SQRTF
:
7538 case BUILT_IN_SQRTL
:
7539 /* Prepare to do logN(sqrt(x) -> 0.5*logN(x). */
7540 x
= TREE_VALUE (TREE_OPERAND (arg
, 1));
7541 exponent
= build_real (type
, dconsthalf
);
7544 case BUILT_IN_CBRTF
:
7545 case BUILT_IN_CBRTL
:
7546 /* Prepare to do logN(cbrt(x) -> (1/3)*logN(x). */
7547 x
= TREE_VALUE (TREE_OPERAND (arg
, 1));
7548 exponent
= build_real (type
, real_value_truncate (TYPE_MODE (type
),
7554 /* Prepare to do logN(pow(x,exponent) -> exponent*logN(x). */
7555 x
= TREE_VALUE (TREE_OPERAND (arg
, 1));
7556 exponent
= TREE_VALUE (TREE_CHAIN (TREE_OPERAND (arg
, 1)));
7562 /* Now perform the optimization. */
7566 arglist
= build_tree_list (NULL_TREE
, x
);
7567 logfn
= build_function_call_expr (fndecl
, arglist
);
7568 return fold_build2 (MULT_EXPR
, type
, exponent
, logfn
);
7576 /* Fold a builtin function call to pow, powf, or powl. Return
7577 NULL_TREE if no simplification can be made. */
7579 fold_builtin_pow (tree fndecl
, tree arglist
, tree type
)
7581 tree arg0
= TREE_VALUE (arglist
);
7582 tree arg1
= TREE_VALUE (TREE_CHAIN (arglist
));
7584 if (!validate_arglist (arglist
, REAL_TYPE
, REAL_TYPE
, VOID_TYPE
))
7587 /* Optimize pow(1.0,y) = 1.0. */
7588 if (real_onep (arg0
))
7589 return omit_one_operand (type
, build_real (type
, dconst1
), arg1
);
7591 if (TREE_CODE (arg1
) == REAL_CST
7592 && ! TREE_CONSTANT_OVERFLOW (arg1
))
7594 REAL_VALUE_TYPE cint
;
7598 c
= TREE_REAL_CST (arg1
);
7600 /* Optimize pow(x,0.0) = 1.0. */
7601 if (REAL_VALUES_EQUAL (c
, dconst0
))
7602 return omit_one_operand (type
, build_real (type
, dconst1
),
7605 /* Optimize pow(x,1.0) = x. */
7606 if (REAL_VALUES_EQUAL (c
, dconst1
))
7609 /* Optimize pow(x,-1.0) = 1.0/x. */
7610 if (REAL_VALUES_EQUAL (c
, dconstm1
))
7611 return fold_build2 (RDIV_EXPR
, type
,
7612 build_real (type
, dconst1
), arg0
);
7614 /* Optimize pow(x,0.5) = sqrt(x). */
7615 if (flag_unsafe_math_optimizations
7616 && REAL_VALUES_EQUAL (c
, dconsthalf
))
7618 tree sqrtfn
= mathfn_built_in (type
, BUILT_IN_SQRT
);
7620 if (sqrtfn
!= NULL_TREE
)
7622 tree arglist
= build_tree_list (NULL_TREE
, arg0
);
7623 return build_function_call_expr (sqrtfn
, arglist
);
7627 /* Check for an integer exponent. */
7628 n
= real_to_integer (&c
);
7629 real_from_integer (&cint
, VOIDmode
, n
, n
< 0 ? -1 : 0, 0);
7630 if (real_identical (&c
, &cint
))
7632 /* Attempt to evaluate pow at compile-time. */
7633 if (TREE_CODE (arg0
) == REAL_CST
7634 && ! TREE_CONSTANT_OVERFLOW (arg0
))
7639 x
= TREE_REAL_CST (arg0
);
7640 inexact
= real_powi (&x
, TYPE_MODE (type
), &x
, n
);
7641 if (flag_unsafe_math_optimizations
|| !inexact
)
7642 return build_real (type
, x
);
7645 /* Strip sign ops from even integer powers. */
7646 if ((n
& 1) == 0 && flag_unsafe_math_optimizations
)
7648 tree narg0
= fold_strip_sign_ops (arg0
);
7651 arglist
= build_tree_list (NULL_TREE
, arg1
);
7652 arglist
= tree_cons (NULL_TREE
, narg0
, arglist
);
7653 return build_function_call_expr (fndecl
, arglist
);
7659 if (flag_unsafe_math_optimizations
)
7661 const enum built_in_function fcode
= builtin_mathfn_code (arg0
);
7663 /* Optimize pow(expN(x),y) = expN(x*y). */
7664 if (BUILTIN_EXPONENT_P (fcode
))
7666 tree expfn
= TREE_OPERAND (TREE_OPERAND (arg0
, 0), 0);
7667 tree arg
= TREE_VALUE (TREE_OPERAND (arg0
, 1));
7668 arg
= fold_build2 (MULT_EXPR
, type
, arg
, arg1
);
7669 arglist
= build_tree_list (NULL_TREE
, arg
);
7670 return build_function_call_expr (expfn
, arglist
);
7673 /* Optimize pow(sqrt(x),y) = pow(x,y*0.5). */
7674 if (BUILTIN_SQRT_P (fcode
))
7676 tree narg0
= TREE_VALUE (TREE_OPERAND (arg0
, 1));
7677 tree narg1
= fold_build2 (MULT_EXPR
, type
, arg1
,
7678 build_real (type
, dconsthalf
));
7680 arglist
= tree_cons (NULL_TREE
, narg0
,
7681 build_tree_list (NULL_TREE
, narg1
));
7682 return build_function_call_expr (fndecl
, arglist
);
7685 /* Optimize pow(cbrt(x),y) = pow(x,y/3) iff x is nonnegative. */
7686 if (BUILTIN_CBRT_P (fcode
))
7688 tree arg
= TREE_VALUE (TREE_OPERAND (arg0
, 1));
7689 if (tree_expr_nonnegative_p (arg
))
7691 const REAL_VALUE_TYPE dconstroot
7692 = real_value_truncate (TYPE_MODE (type
), dconstthird
);
7693 tree narg1
= fold_build2 (MULT_EXPR
, type
, arg1
,
7694 build_real (type
, dconstroot
));
7695 arglist
= tree_cons (NULL_TREE
, arg
,
7696 build_tree_list (NULL_TREE
, narg1
));
7697 return build_function_call_expr (fndecl
, arglist
);
7701 /* Optimize pow(pow(x,y),z) = pow(x,y*z). */
7702 if (fcode
== BUILT_IN_POW
|| fcode
== BUILT_IN_POWF
7703 || fcode
== BUILT_IN_POWL
)
7705 tree arg00
= TREE_VALUE (TREE_OPERAND (arg0
, 1));
7706 tree arg01
= TREE_VALUE (TREE_CHAIN (TREE_OPERAND (arg0
, 1)));
7707 tree narg1
= fold_build2 (MULT_EXPR
, type
, arg01
, arg1
);
7708 arglist
= tree_cons (NULL_TREE
, arg00
,
7709 build_tree_list (NULL_TREE
, narg1
));
7710 return build_function_call_expr (fndecl
, arglist
);
7717 /* Fold a builtin function call to powi, powif, or powil. Return
7718 NULL_TREE if no simplification can be made. */
7720 fold_builtin_powi (tree fndecl ATTRIBUTE_UNUSED
, tree arglist
, tree type
)
7722 tree arg0
= TREE_VALUE (arglist
);
7723 tree arg1
= TREE_VALUE (TREE_CHAIN (arglist
));
7725 if (!validate_arglist (arglist
, REAL_TYPE
, INTEGER_TYPE
, VOID_TYPE
))
7728 /* Optimize pow(1.0,y) = 1.0. */
7729 if (real_onep (arg0
))
7730 return omit_one_operand (type
, build_real (type
, dconst1
), arg1
);
7732 if (host_integerp (arg1
, 0))
7734 HOST_WIDE_INT c
= TREE_INT_CST_LOW (arg1
);
7736 /* Evaluate powi at compile-time. */
7737 if (TREE_CODE (arg0
) == REAL_CST
7738 && ! TREE_CONSTANT_OVERFLOW (arg0
))
7741 x
= TREE_REAL_CST (arg0
);
7742 real_powi (&x
, TYPE_MODE (type
), &x
, c
);
7743 return build_real (type
, x
);
7746 /* Optimize pow(x,0) = 1.0. */
7748 return omit_one_operand (type
, build_real (type
, dconst1
),
7751 /* Optimize pow(x,1) = x. */
7755 /* Optimize pow(x,-1) = 1.0/x. */
7757 return fold_build2 (RDIV_EXPR
, type
,
7758 build_real (type
, dconst1
), arg0
);
7764 /* A subroutine of fold_builtin to fold the various exponent
7765 functions. EXP is the CALL_EXPR of a call to a builtin function.
7766 VALUE is the value which will be raised to a power. */
7769 fold_builtin_exponent (tree fndecl
, tree arglist
,
7770 const REAL_VALUE_TYPE
*value
)
7772 if (validate_arglist (arglist
, REAL_TYPE
, VOID_TYPE
))
7774 tree type
= TREE_TYPE (TREE_TYPE (fndecl
));
7775 tree arg
= TREE_VALUE (arglist
);
7777 /* Optimize exp*(0.0) = 1.0. */
7778 if (real_zerop (arg
))
7779 return build_real (type
, dconst1
);
7781 /* Optimize expN(1.0) = N. */
7782 if (real_onep (arg
))
7784 REAL_VALUE_TYPE cst
;
7786 real_convert (&cst
, TYPE_MODE (type
), value
);
7787 return build_real (type
, cst
);
7790 /* Attempt to evaluate expN(integer) at compile-time. */
7791 if (flag_unsafe_math_optimizations
7792 && TREE_CODE (arg
) == REAL_CST
7793 && ! TREE_CONSTANT_OVERFLOW (arg
))
7795 REAL_VALUE_TYPE cint
;
7799 c
= TREE_REAL_CST (arg
);
7800 n
= real_to_integer (&c
);
7801 real_from_integer (&cint
, VOIDmode
, n
,
7803 if (real_identical (&c
, &cint
))
7807 real_powi (&x
, TYPE_MODE (type
), value
, n
);
7808 return build_real (type
, x
);
7812 /* Optimize expN(logN(x)) = x. */
7813 if (flag_unsafe_math_optimizations
)
7815 const enum built_in_function fcode
= builtin_mathfn_code (arg
);
7817 if ((value
== &dconste
7818 && (fcode
== BUILT_IN_LOG
7819 || fcode
== BUILT_IN_LOGF
7820 || fcode
== BUILT_IN_LOGL
))
7821 || (value
== &dconst2
7822 && (fcode
== BUILT_IN_LOG2
7823 || fcode
== BUILT_IN_LOG2F
7824 || fcode
== BUILT_IN_LOG2L
))
7825 || (value
== &dconst10
7826 && (fcode
== BUILT_IN_LOG10
7827 || fcode
== BUILT_IN_LOG10F
7828 || fcode
== BUILT_IN_LOG10L
)))
7829 return fold_convert (type
, TREE_VALUE (TREE_OPERAND (arg
, 1)));
7836 /* Fold function call to builtin memcpy. Return
7837 NULL_TREE if no simplification can be made. */
7840 fold_builtin_memcpy (tree fndecl
, tree arglist
)
7842 tree dest
, src
, len
;
7844 if (!validate_arglist (arglist
,
7845 POINTER_TYPE
, POINTER_TYPE
, INTEGER_TYPE
, VOID_TYPE
))
7848 dest
= TREE_VALUE (arglist
);
7849 src
= TREE_VALUE (TREE_CHAIN (arglist
));
7850 len
= TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist
)));
7852 /* If the LEN parameter is zero, return DEST. */
7853 if (integer_zerop (len
))
7854 return omit_one_operand (TREE_TYPE (TREE_TYPE (fndecl
)), dest
, src
);
7856 /* If SRC and DEST are the same (and not volatile), return DEST. */
7857 if (operand_equal_p (src
, dest
, 0))
7858 return omit_one_operand (TREE_TYPE (TREE_TYPE (fndecl
)), dest
, len
);
7863 /* Fold function call to builtin mempcpy. Return
7864 NULL_TREE if no simplification can be made. */
7867 fold_builtin_mempcpy (tree arglist
, tree type
, int endp
)
7869 if (validate_arglist (arglist
,
7870 POINTER_TYPE
, POINTER_TYPE
, INTEGER_TYPE
, VOID_TYPE
))
7872 tree dest
= TREE_VALUE (arglist
);
7873 tree src
= TREE_VALUE (TREE_CHAIN (arglist
));
7874 tree len
= TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist
)));
7876 /* If the LEN parameter is zero, return DEST. */
7877 if (integer_zerop (len
))
7878 return omit_one_operand (type
, dest
, src
);
7880 /* If SRC and DEST are the same (and not volatile), return DEST+LEN. */
7881 if (operand_equal_p (src
, dest
, 0))
7884 return omit_one_operand (type
, dest
, len
);
7887 len
= fold_build2 (MINUS_EXPR
, TREE_TYPE (len
), len
,
7890 len
= fold_convert (TREE_TYPE (dest
), len
);
7891 len
= fold_build2 (PLUS_EXPR
, TREE_TYPE (dest
), dest
, len
);
7892 return fold_convert (type
, len
);
7898 /* Fold function call to builtin memmove. Return
7899 NULL_TREE if no simplification can be made. */
7902 fold_builtin_memmove (tree arglist
, tree type
)
7904 tree dest
, src
, len
;
7906 if (!validate_arglist (arglist
,
7907 POINTER_TYPE
, POINTER_TYPE
, INTEGER_TYPE
, VOID_TYPE
))
7910 dest
= TREE_VALUE (arglist
);
7911 src
= TREE_VALUE (TREE_CHAIN (arglist
));
7912 len
= TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist
)));
7914 /* If the LEN parameter is zero, return DEST. */
7915 if (integer_zerop (len
))
7916 return omit_one_operand (type
, dest
, src
);
7918 /* If SRC and DEST are the same (and not volatile), return DEST. */
7919 if (operand_equal_p (src
, dest
, 0))
7920 return omit_one_operand (type
, dest
, len
);
7925 /* Fold function call to builtin strcpy. If LEN is not NULL, it represents
7926 the length of the string to be copied. Return NULL_TREE if no
7927 simplification can be made. */
7930 fold_builtin_strcpy (tree fndecl
, tree arglist
, tree len
)
7934 if (!validate_arglist (arglist
,
7935 POINTER_TYPE
, POINTER_TYPE
, VOID_TYPE
))
7938 dest
= TREE_VALUE (arglist
);
7939 src
= TREE_VALUE (TREE_CHAIN (arglist
));
7941 /* If SRC and DEST are the same (and not volatile), return DEST. */
7942 if (operand_equal_p (src
, dest
, 0))
7943 return fold_convert (TREE_TYPE (TREE_TYPE (fndecl
)), dest
);
7948 fn
= implicit_built_in_decls
[BUILT_IN_MEMCPY
];
7954 len
= c_strlen (src
, 1);
7955 if (! len
|| TREE_SIDE_EFFECTS (len
))
7959 len
= size_binop (PLUS_EXPR
, len
, ssize_int (1));
7960 arglist
= build_tree_list (NULL_TREE
, len
);
7961 arglist
= tree_cons (NULL_TREE
, src
, arglist
);
7962 arglist
= tree_cons (NULL_TREE
, dest
, arglist
);
7963 return fold_convert (TREE_TYPE (TREE_TYPE (fndecl
)),
7964 build_function_call_expr (fn
, arglist
));
7967 /* Fold function call to builtin strncpy. If SLEN is not NULL, it represents
7968 the length of the source string. Return NULL_TREE if no simplification
7972 fold_builtin_strncpy (tree fndecl
, tree arglist
, tree slen
)
7974 tree dest
, src
, len
, fn
;
7976 if (!validate_arglist (arglist
,
7977 POINTER_TYPE
, POINTER_TYPE
, INTEGER_TYPE
, VOID_TYPE
))
7980 dest
= TREE_VALUE (arglist
);
7981 src
= TREE_VALUE (TREE_CHAIN (arglist
));
7982 len
= TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist
)));
7984 /* If the LEN parameter is zero, return DEST. */
7985 if (integer_zerop (len
))
7986 return omit_one_operand (TREE_TYPE (TREE_TYPE (fndecl
)), dest
, src
);
7988 /* We can't compare slen with len as constants below if len is not a
7990 if (len
== 0 || TREE_CODE (len
) != INTEGER_CST
)
7994 slen
= c_strlen (src
, 1);
7996 /* Now, we must be passed a constant src ptr parameter. */
7997 if (slen
== 0 || TREE_CODE (slen
) != INTEGER_CST
)
8000 slen
= size_binop (PLUS_EXPR
, slen
, ssize_int (1));
8002 /* We do not support simplification of this case, though we do
8003 support it when expanding trees into RTL. */
8004 /* FIXME: generate a call to __builtin_memset. */
8005 if (tree_int_cst_lt (slen
, len
))
8008 /* OK transform into builtin memcpy. */
8009 fn
= implicit_built_in_decls
[BUILT_IN_MEMCPY
];
8012 return fold_convert (TREE_TYPE (TREE_TYPE (fndecl
)),
8013 build_function_call_expr (fn
, arglist
));
8016 /* Fold function call to builtin memcmp. Return
8017 NULL_TREE if no simplification can be made. */
8020 fold_builtin_memcmp (tree arglist
)
8022 tree arg1
, arg2
, len
;
8023 const char *p1
, *p2
;
8025 if (!validate_arglist (arglist
,
8026 POINTER_TYPE
, POINTER_TYPE
, INTEGER_TYPE
, VOID_TYPE
))
8029 arg1
= TREE_VALUE (arglist
);
8030 arg2
= TREE_VALUE (TREE_CHAIN (arglist
));
8031 len
= TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist
)));
8033 /* If the LEN parameter is zero, return zero. */
8034 if (integer_zerop (len
))
8035 return omit_two_operands (integer_type_node
, integer_zero_node
,
8038 /* If ARG1 and ARG2 are the same (and not volatile), return zero. */
8039 if (operand_equal_p (arg1
, arg2
, 0))
8040 return omit_one_operand (integer_type_node
, integer_zero_node
, len
);
8042 p1
= c_getstr (arg1
);
8043 p2
= c_getstr (arg2
);
8045 /* If all arguments are constant, and the value of len is not greater
8046 than the lengths of arg1 and arg2, evaluate at compile-time. */
8047 if (host_integerp (len
, 1) && p1
&& p2
8048 && compare_tree_int (len
, strlen (p1
) + 1) <= 0
8049 && compare_tree_int (len
, strlen (p2
) + 1) <= 0)
8051 const int r
= memcmp (p1
, p2
, tree_low_cst (len
, 1));
8054 return integer_one_node
;
8056 return integer_minus_one_node
;
8058 return integer_zero_node
;
8061 /* If len parameter is one, return an expression corresponding to
8062 (*(const unsigned char*)arg1 - (const unsigned char*)arg2). */
8063 if (host_integerp (len
, 1) && tree_low_cst (len
, 1) == 1)
8065 tree cst_uchar_node
= build_type_variant (unsigned_char_type_node
, 1, 0);
8066 tree cst_uchar_ptr_node
= build_pointer_type (cst_uchar_node
);
8067 tree ind1
= fold_convert (integer_type_node
,
8068 build1 (INDIRECT_REF
, cst_uchar_node
,
8069 fold_convert (cst_uchar_ptr_node
,
8071 tree ind2
= fold_convert (integer_type_node
,
8072 build1 (INDIRECT_REF
, cst_uchar_node
,
8073 fold_convert (cst_uchar_ptr_node
,
8075 return fold_build2 (MINUS_EXPR
, integer_type_node
, ind1
, ind2
);
8081 /* Fold function call to builtin strcmp. Return
8082 NULL_TREE if no simplification can be made. */
8085 fold_builtin_strcmp (tree arglist
)
8088 const char *p1
, *p2
;
8090 if (!validate_arglist (arglist
, POINTER_TYPE
, POINTER_TYPE
, VOID_TYPE
))
8093 arg1
= TREE_VALUE (arglist
);
8094 arg2
= TREE_VALUE (TREE_CHAIN (arglist
));
8096 /* If ARG1 and ARG2 are the same (and not volatile), return zero. */
8097 if (operand_equal_p (arg1
, arg2
, 0))
8098 return integer_zero_node
;
8100 p1
= c_getstr (arg1
);
8101 p2
= c_getstr (arg2
);
8105 const int i
= strcmp (p1
, p2
);
8107 return integer_minus_one_node
;
8109 return integer_one_node
;
8111 return integer_zero_node
;
8114 /* If the second arg is "", return *(const unsigned char*)arg1. */
8115 if (p2
&& *p2
== '\0')
8117 tree cst_uchar_node
= build_type_variant (unsigned_char_type_node
, 1, 0);
8118 tree cst_uchar_ptr_node
= build_pointer_type (cst_uchar_node
);
8119 return fold_convert (integer_type_node
,
8120 build1 (INDIRECT_REF
, cst_uchar_node
,
8121 fold_convert (cst_uchar_ptr_node
,
8125 /* If the first arg is "", return -*(const unsigned char*)arg2. */
8126 if (p1
&& *p1
== '\0')
8128 tree cst_uchar_node
= build_type_variant (unsigned_char_type_node
, 1, 0);
8129 tree cst_uchar_ptr_node
= build_pointer_type (cst_uchar_node
);
8130 tree temp
= fold_convert (integer_type_node
,
8131 build1 (INDIRECT_REF
, cst_uchar_node
,
8132 fold_convert (cst_uchar_ptr_node
,
8134 return fold_build1 (NEGATE_EXPR
, integer_type_node
, temp
);
8140 /* Fold function call to builtin strncmp. Return
8141 NULL_TREE if no simplification can be made. */
8144 fold_builtin_strncmp (tree arglist
)
8146 tree arg1
, arg2
, len
;
8147 const char *p1
, *p2
;
8149 if (!validate_arglist (arglist
,
8150 POINTER_TYPE
, POINTER_TYPE
, INTEGER_TYPE
, VOID_TYPE
))
8153 arg1
= TREE_VALUE (arglist
);
8154 arg2
= TREE_VALUE (TREE_CHAIN (arglist
));
8155 len
= TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist
)));
8157 /* If the LEN parameter is zero, return zero. */
8158 if (integer_zerop (len
))
8159 return omit_two_operands (integer_type_node
, integer_zero_node
,
8162 /* If ARG1 and ARG2 are the same (and not volatile), return zero. */
8163 if (operand_equal_p (arg1
, arg2
, 0))
8164 return omit_one_operand (integer_type_node
, integer_zero_node
, len
);
8166 p1
= c_getstr (arg1
);
8167 p2
= c_getstr (arg2
);
8169 if (host_integerp (len
, 1) && p1
&& p2
)
8171 const int i
= strncmp (p1
, p2
, tree_low_cst (len
, 1));
8173 return integer_one_node
;
8175 return integer_minus_one_node
;
8177 return integer_zero_node
;
8180 /* If the second arg is "", and the length is greater than zero,
8181 return *(const unsigned char*)arg1. */
8182 if (p2
&& *p2
== '\0'
8183 && TREE_CODE (len
) == INTEGER_CST
8184 && tree_int_cst_sgn (len
) == 1)
8186 tree cst_uchar_node
= build_type_variant (unsigned_char_type_node
, 1, 0);
8187 tree cst_uchar_ptr_node
= build_pointer_type (cst_uchar_node
);
8188 return fold_convert (integer_type_node
,
8189 build1 (INDIRECT_REF
, cst_uchar_node
,
8190 fold_convert (cst_uchar_ptr_node
,
8194 /* If the first arg is "", and the length is greater than zero,
8195 return -*(const unsigned char*)arg2. */
8196 if (p1
&& *p1
== '\0'
8197 && TREE_CODE (len
) == INTEGER_CST
8198 && tree_int_cst_sgn (len
) == 1)
8200 tree cst_uchar_node
= build_type_variant (unsigned_char_type_node
, 1, 0);
8201 tree cst_uchar_ptr_node
= build_pointer_type (cst_uchar_node
);
8202 tree temp
= fold_convert (integer_type_node
,
8203 build1 (INDIRECT_REF
, cst_uchar_node
,
8204 fold_convert (cst_uchar_ptr_node
,
8206 return fold_build1 (NEGATE_EXPR
, integer_type_node
, temp
);
8209 /* If len parameter is one, return an expression corresponding to
8210 (*(const unsigned char*)arg1 - (const unsigned char*)arg2). */
8211 if (host_integerp (len
, 1) && tree_low_cst (len
, 1) == 1)
8213 tree cst_uchar_node
= build_type_variant (unsigned_char_type_node
, 1, 0);
8214 tree cst_uchar_ptr_node
= build_pointer_type (cst_uchar_node
);
8215 tree ind1
= fold_convert (integer_type_node
,
8216 build1 (INDIRECT_REF
, cst_uchar_node
,
8217 fold_convert (cst_uchar_ptr_node
,
8219 tree ind2
= fold_convert (integer_type_node
,
8220 build1 (INDIRECT_REF
, cst_uchar_node
,
8221 fold_convert (cst_uchar_ptr_node
,
8223 return fold_build2 (MINUS_EXPR
, integer_type_node
, ind1
, ind2
);
8229 /* Fold function call to builtin signbit, signbitf or signbitl. Return
8230 NULL_TREE if no simplification can be made. */
8233 fold_builtin_signbit (tree fndecl
, tree arglist
)
8235 tree type
= TREE_TYPE (TREE_TYPE (fndecl
));
8238 if (!validate_arglist (arglist
, REAL_TYPE
, VOID_TYPE
))
8241 arg
= TREE_VALUE (arglist
);
8243 /* If ARG is a compile-time constant, determine the result. */
8244 if (TREE_CODE (arg
) == REAL_CST
8245 && !TREE_CONSTANT_OVERFLOW (arg
))
8249 c
= TREE_REAL_CST (arg
);
8250 temp
= REAL_VALUE_NEGATIVE (c
) ? integer_one_node
: integer_zero_node
;
8251 return fold_convert (type
, temp
);
8254 /* If ARG is non-negative, the result is always zero. */
8255 if (tree_expr_nonnegative_p (arg
))
8256 return omit_one_operand (type
, integer_zero_node
, arg
);
8258 /* If ARG's format doesn't have signed zeros, return "arg < 0.0". */
8259 if (!HONOR_SIGNED_ZEROS (TYPE_MODE (TREE_TYPE (arg
))))
8260 return fold_build2 (LT_EXPR
, type
, arg
,
8261 build_real (TREE_TYPE (arg
), dconst0
));
8266 /* Fold function call to builtin copysign, copysignf or copysignl.
8267 Return NULL_TREE if no simplification can be made. */
8270 fold_builtin_copysign (tree fndecl
, tree arglist
, tree type
)
8272 tree arg1
, arg2
, tem
;
8274 if (!validate_arglist (arglist
, REAL_TYPE
, REAL_TYPE
, VOID_TYPE
))
8277 arg1
= TREE_VALUE (arglist
);
8278 arg2
= TREE_VALUE (TREE_CHAIN (arglist
));
8280 /* copysign(X,X) is X. */
8281 if (operand_equal_p (arg1
, arg2
, 0))
8282 return fold_convert (type
, arg1
);
8284 /* If ARG1 and ARG2 are compile-time constants, determine the result. */
8285 if (TREE_CODE (arg1
) == REAL_CST
8286 && TREE_CODE (arg2
) == REAL_CST
8287 && !TREE_CONSTANT_OVERFLOW (arg1
)
8288 && !TREE_CONSTANT_OVERFLOW (arg2
))
8290 REAL_VALUE_TYPE c1
, c2
;
8292 c1
= TREE_REAL_CST (arg1
);
8293 c2
= TREE_REAL_CST (arg2
);
8294 real_copysign (&c1
, &c2
);
8295 return build_real (type
, c1
);
8299 /* copysign(X, Y) is fabs(X) when Y is always non-negative.
8300 Remember to evaluate Y for side-effects. */
8301 if (tree_expr_nonnegative_p (arg2
))
8302 return omit_one_operand (type
,
8303 fold_build1 (ABS_EXPR
, type
, arg1
),
8306 /* Strip sign changing operations for the first argument. */
8307 tem
= fold_strip_sign_ops (arg1
);
8310 arglist
= tree_cons (NULL_TREE
, tem
, TREE_CHAIN (arglist
));
8311 return build_function_call_expr (fndecl
, arglist
);
8317 /* Fold a call to builtin isascii. */
8320 fold_builtin_isascii (tree arglist
)
8322 if (! validate_arglist (arglist
, INTEGER_TYPE
, VOID_TYPE
))
8326 /* Transform isascii(c) -> ((c & ~0x7f) == 0). */
8327 tree arg
= TREE_VALUE (arglist
);
8329 arg
= build2 (BIT_AND_EXPR
, integer_type_node
, arg
,
8330 build_int_cst (NULL_TREE
,
8331 ~ (unsigned HOST_WIDE_INT
) 0x7f));
8332 arg
= fold_build2 (EQ_EXPR
, integer_type_node
,
8333 arg
, integer_zero_node
);
8335 if (in_gimple_form
&& !TREE_CONSTANT (arg
))
8342 /* Fold a call to builtin toascii. */
8345 fold_builtin_toascii (tree arglist
)
8347 if (! validate_arglist (arglist
, INTEGER_TYPE
, VOID_TYPE
))
8351 /* Transform toascii(c) -> (c & 0x7f). */
8352 tree arg
= TREE_VALUE (arglist
);
8354 return fold_build2 (BIT_AND_EXPR
, integer_type_node
, arg
,
8355 build_int_cst (NULL_TREE
, 0x7f));
8359 /* Fold a call to builtin isdigit. */
8362 fold_builtin_isdigit (tree arglist
)
8364 if (! validate_arglist (arglist
, INTEGER_TYPE
, VOID_TYPE
))
8368 /* Transform isdigit(c) -> (unsigned)(c) - '0' <= 9. */
8369 /* According to the C standard, isdigit is unaffected by locale.
8370 However, it definitely is affected by the target character set. */
8372 unsigned HOST_WIDE_INT target_digit0
8373 = lang_hooks
.to_target_charset ('0');
8375 if (target_digit0
== 0)
8378 arg
= fold_convert (unsigned_type_node
, TREE_VALUE (arglist
));
8379 arg
= build2 (MINUS_EXPR
, unsigned_type_node
, arg
,
8380 build_int_cst (unsigned_type_node
, target_digit0
));
8381 arg
= fold_build2 (LE_EXPR
, integer_type_node
, arg
,
8382 build_int_cst (unsigned_type_node
, 9));
8383 if (in_gimple_form
&& !TREE_CONSTANT (arg
))
8390 /* Fold a call to fabs, fabsf or fabsl. */
8393 fold_builtin_fabs (tree arglist
, tree type
)
8397 if (!validate_arglist (arglist
, REAL_TYPE
, VOID_TYPE
))
8400 arg
= TREE_VALUE (arglist
);
8401 arg
= fold_convert (type
, arg
);
8402 if (TREE_CODE (arg
) == REAL_CST
)
8403 return fold_abs_const (arg
, type
);
8404 return fold_build1 (ABS_EXPR
, type
, arg
);
8407 /* Fold a call to abs, labs, llabs or imaxabs. */
8410 fold_builtin_abs (tree arglist
, tree type
)
8414 if (!validate_arglist (arglist
, INTEGER_TYPE
, VOID_TYPE
))
8417 arg
= TREE_VALUE (arglist
);
8418 arg
= fold_convert (type
, arg
);
8419 if (TREE_CODE (arg
) == INTEGER_CST
)
8420 return fold_abs_const (arg
, type
);
8421 return fold_build1 (ABS_EXPR
, type
, arg
);
8424 /* Fold a call to __builtin_isnan(), __builtin_isinf, __builtin_finite.
8425 EXP is the CALL_EXPR for the call. */
8428 fold_builtin_classify (tree fndecl
, tree arglist
, int builtin_index
)
8430 tree type
= TREE_TYPE (TREE_TYPE (fndecl
));
8434 if (!validate_arglist (arglist
, REAL_TYPE
, VOID_TYPE
))
8436 /* Check that we have exactly one argument. */
8439 error ("too few arguments to function %qs",
8440 IDENTIFIER_POINTER (DECL_NAME (fndecl
)));
8441 return error_mark_node
;
8443 else if (TREE_CHAIN (arglist
) != 0)
8445 error ("too many arguments to function %qs",
8446 IDENTIFIER_POINTER (DECL_NAME (fndecl
)));
8447 return error_mark_node
;
8451 error ("non-floating-point argument to function %qs",
8452 IDENTIFIER_POINTER (DECL_NAME (fndecl
)));
8453 return error_mark_node
;
8457 arg
= TREE_VALUE (arglist
);
8458 switch (builtin_index
)
8460 case BUILT_IN_ISINF
:
8461 if (!MODE_HAS_INFINITIES (TYPE_MODE (TREE_TYPE (arg
))))
8462 return omit_one_operand (type
, integer_zero_node
, arg
);
8464 if (TREE_CODE (arg
) == REAL_CST
)
8466 r
= TREE_REAL_CST (arg
);
8467 if (real_isinf (&r
))
8468 return real_compare (GT_EXPR
, &r
, &dconst0
)
8469 ? integer_one_node
: integer_minus_one_node
;
8471 return integer_zero_node
;
8476 case BUILT_IN_FINITE
:
8477 if (!MODE_HAS_NANS (TYPE_MODE (TREE_TYPE (arg
)))
8478 && !MODE_HAS_INFINITIES (TYPE_MODE (TREE_TYPE (arg
))))
8479 return omit_one_operand (type
, integer_zero_node
, arg
);
8481 if (TREE_CODE (arg
) == REAL_CST
)
8483 r
= TREE_REAL_CST (arg
);
8484 return real_isinf (&r
) || real_isnan (&r
)
8485 ? integer_zero_node
: integer_one_node
;
8490 case BUILT_IN_ISNAN
:
8491 if (!MODE_HAS_NANS (TYPE_MODE (TREE_TYPE (arg
))))
8492 return omit_one_operand (type
, integer_zero_node
, arg
);
8494 if (TREE_CODE (arg
) == REAL_CST
)
8496 r
= TREE_REAL_CST (arg
);
8497 return real_isnan (&r
) ? integer_one_node
: integer_zero_node
;
8500 arg
= builtin_save_expr (arg
);
8501 return fold_build2 (UNORDERED_EXPR
, type
, arg
, arg
);
8508 /* Fold a call to an unordered comparison function such as
8509 __builtin_isgreater(). FNDECL is the FUNCTION_DECL for the function
8510 being called and ARGLIST is the argument list for the call.
8511 UNORDERED_CODE and ORDERED_CODE are comparison codes that give
8512 the opposite of the desired result. UNORDERED_CODE is used
8513 for modes that can hold NaNs and ORDERED_CODE is used for
8517 fold_builtin_unordered_cmp (tree fndecl
, tree arglist
,
8518 enum tree_code unordered_code
,
8519 enum tree_code ordered_code
)
8521 tree type
= TREE_TYPE (TREE_TYPE (fndecl
));
8522 enum tree_code code
;
8525 enum tree_code code0
, code1
;
8526 tree cmp_type
= NULL_TREE
;
8528 if (!validate_arglist (arglist
, REAL_TYPE
, REAL_TYPE
, VOID_TYPE
))
8530 /* Check that we have exactly two arguments. */
8531 if (arglist
== 0 || TREE_CHAIN (arglist
) == 0)
8533 error ("too few arguments to function %qs",
8534 IDENTIFIER_POINTER (DECL_NAME (fndecl
)));
8535 return error_mark_node
;
8537 else if (TREE_CHAIN (TREE_CHAIN (arglist
)) != 0)
8539 error ("too many arguments to function %qs",
8540 IDENTIFIER_POINTER (DECL_NAME (fndecl
)));
8541 return error_mark_node
;
8545 arg0
= TREE_VALUE (arglist
);
8546 arg1
= TREE_VALUE (TREE_CHAIN (arglist
));
8548 type0
= TREE_TYPE (arg0
);
8549 type1
= TREE_TYPE (arg1
);
8551 code0
= TREE_CODE (type0
);
8552 code1
= TREE_CODE (type1
);
8554 if (code0
== REAL_TYPE
&& code1
== REAL_TYPE
)
8555 /* Choose the wider of two real types. */
8556 cmp_type
= TYPE_PRECISION (type0
) >= TYPE_PRECISION (type1
)
8558 else if (code0
== REAL_TYPE
&& code1
== INTEGER_TYPE
)
8560 else if (code0
== INTEGER_TYPE
&& code1
== REAL_TYPE
)
8564 error ("non-floating-point argument to function %qs",
8565 IDENTIFIER_POINTER (DECL_NAME (fndecl
)));
8566 return error_mark_node
;
8569 arg0
= fold_convert (cmp_type
, arg0
);
8570 arg1
= fold_convert (cmp_type
, arg1
);
8572 if (unordered_code
== UNORDERED_EXPR
)
8574 if (!MODE_HAS_NANS (TYPE_MODE (TREE_TYPE (arg0
))))
8575 return omit_two_operands (type
, integer_zero_node
, arg0
, arg1
);
8576 return fold_build2 (UNORDERED_EXPR
, type
, arg0
, arg1
);
8579 code
= MODE_HAS_NANS (TYPE_MODE (TREE_TYPE (arg0
))) ? unordered_code
8581 return fold_build1 (TRUTH_NOT_EXPR
, type
,
8582 fold_build2 (code
, type
, arg0
, arg1
));
8585 /* Used by constant folding to simplify calls to builtin functions. EXP is
8586 the CALL_EXPR of a call to a builtin function. IGNORE is true if the
8587 result of the function call is ignored. This function returns NULL_TREE
8588 if no simplification was possible. */
8591 fold_builtin_1 (tree fndecl
, tree arglist
, bool ignore
)
8593 tree type
= TREE_TYPE (TREE_TYPE (fndecl
));
8594 enum built_in_function fcode
;
8596 if (DECL_BUILT_IN_CLASS (fndecl
) == BUILT_IN_MD
)
8597 return targetm
.fold_builtin (fndecl
, arglist
, ignore
);
8599 fcode
= DECL_FUNCTION_CODE (fndecl
);
8602 case BUILT_IN_FPUTS
:
8603 return fold_builtin_fputs (arglist
, ignore
, false, NULL_TREE
);
8605 case BUILT_IN_FPUTS_UNLOCKED
:
8606 return fold_builtin_fputs (arglist
, ignore
, true, NULL_TREE
);
8608 case BUILT_IN_STRSTR
:
8609 return fold_builtin_strstr (arglist
, type
);
8611 case BUILT_IN_STRCAT
:
8612 return fold_builtin_strcat (arglist
);
8614 case BUILT_IN_STRNCAT
:
8615 return fold_builtin_strncat (arglist
);
8617 case BUILT_IN_STRSPN
:
8618 return fold_builtin_strspn (arglist
);
8620 case BUILT_IN_STRCSPN
:
8621 return fold_builtin_strcspn (arglist
);
8623 case BUILT_IN_STRCHR
:
8624 case BUILT_IN_INDEX
:
8625 return fold_builtin_strchr (arglist
, type
);
8627 case BUILT_IN_STRRCHR
:
8628 case BUILT_IN_RINDEX
:
8629 return fold_builtin_strrchr (arglist
, type
);
8631 case BUILT_IN_STRCPY
:
8632 return fold_builtin_strcpy (fndecl
, arglist
, NULL_TREE
);
8634 case BUILT_IN_STRNCPY
:
8635 return fold_builtin_strncpy (fndecl
, arglist
, NULL_TREE
);
8637 case BUILT_IN_STRCMP
:
8638 return fold_builtin_strcmp (arglist
);
8640 case BUILT_IN_STRNCMP
:
8641 return fold_builtin_strncmp (arglist
);
8643 case BUILT_IN_STRPBRK
:
8644 return fold_builtin_strpbrk (arglist
, type
);
8647 case BUILT_IN_MEMCMP
:
8648 return fold_builtin_memcmp (arglist
);
8650 case BUILT_IN_SPRINTF
:
8651 return fold_builtin_sprintf (arglist
, ignore
);
8653 case BUILT_IN_CONSTANT_P
:
8657 val
= fold_builtin_constant_p (arglist
);
8658 /* Gimplification will pull the CALL_EXPR for the builtin out of
8659 an if condition. When not optimizing, we'll not CSE it back.
8660 To avoid link error types of regressions, return false now. */
8661 if (!val
&& !optimize
)
8662 val
= integer_zero_node
;
8667 case BUILT_IN_EXPECT
:
8668 return fold_builtin_expect (arglist
);
8670 case BUILT_IN_CLASSIFY_TYPE
:
8671 return fold_builtin_classify_type (arglist
);
8673 case BUILT_IN_STRLEN
:
8674 return fold_builtin_strlen (arglist
);
8677 case BUILT_IN_FABSF
:
8678 case BUILT_IN_FABSL
:
8679 return fold_builtin_fabs (arglist
, type
);
8683 case BUILT_IN_LLABS
:
8684 case BUILT_IN_IMAXABS
:
8685 return fold_builtin_abs (arglist
, type
);
8688 case BUILT_IN_CONJF
:
8689 case BUILT_IN_CONJL
:
8690 if (validate_arglist (arglist
, COMPLEX_TYPE
, VOID_TYPE
))
8691 return fold_build1 (CONJ_EXPR
, type
, TREE_VALUE (arglist
));
8694 case BUILT_IN_CREAL
:
8695 case BUILT_IN_CREALF
:
8696 case BUILT_IN_CREALL
:
8697 if (validate_arglist (arglist
, COMPLEX_TYPE
, VOID_TYPE
))
8698 return non_lvalue (fold_build1 (REALPART_EXPR
, type
,
8699 TREE_VALUE (arglist
)));
8702 case BUILT_IN_CIMAG
:
8703 case BUILT_IN_CIMAGF
:
8704 case BUILT_IN_CIMAGL
:
8705 if (validate_arglist (arglist
, COMPLEX_TYPE
, VOID_TYPE
))
8706 return non_lvalue (fold_build1 (IMAGPART_EXPR
, type
,
8707 TREE_VALUE (arglist
)));
8711 case BUILT_IN_CABSF
:
8712 case BUILT_IN_CABSL
:
8713 return fold_builtin_cabs (arglist
, type
);
8716 case BUILT_IN_SQRTF
:
8717 case BUILT_IN_SQRTL
:
8718 return fold_builtin_sqrt (arglist
, type
);
8721 case BUILT_IN_CBRTF
:
8722 case BUILT_IN_CBRTL
:
8723 return fold_builtin_cbrt (arglist
, type
);
8728 return fold_builtin_sin (arglist
);
8733 return fold_builtin_cos (arglist
, type
, fndecl
);
8738 return fold_builtin_exponent (fndecl
, arglist
, &dconste
);
8741 case BUILT_IN_EXP2F
:
8742 case BUILT_IN_EXP2L
:
8743 return fold_builtin_exponent (fndecl
, arglist
, &dconst2
);
8745 case BUILT_IN_EXP10
:
8746 case BUILT_IN_EXP10F
:
8747 case BUILT_IN_EXP10L
:
8748 case BUILT_IN_POW10
:
8749 case BUILT_IN_POW10F
:
8750 case BUILT_IN_POW10L
:
8751 return fold_builtin_exponent (fndecl
, arglist
, &dconst10
);
8756 return fold_builtin_logarithm (fndecl
, arglist
, &dconste
);
8759 case BUILT_IN_LOG2F
:
8760 case BUILT_IN_LOG2L
:
8761 return fold_builtin_logarithm (fndecl
, arglist
, &dconst2
);
8763 case BUILT_IN_LOG10
:
8764 case BUILT_IN_LOG10F
:
8765 case BUILT_IN_LOG10L
:
8766 return fold_builtin_logarithm (fndecl
, arglist
, &dconst10
);
8771 return fold_builtin_tan (arglist
);
8774 case BUILT_IN_ATANF
:
8775 case BUILT_IN_ATANL
:
8776 return fold_builtin_atan (arglist
, type
);
8781 return fold_builtin_pow (fndecl
, arglist
, type
);
8784 case BUILT_IN_POWIF
:
8785 case BUILT_IN_POWIL
:
8786 return fold_builtin_powi (fndecl
, arglist
, type
);
8791 return fold_builtin_inf (type
, true);
8793 case BUILT_IN_HUGE_VAL
:
8794 case BUILT_IN_HUGE_VALF
:
8795 case BUILT_IN_HUGE_VALL
:
8796 return fold_builtin_inf (type
, false);
8801 return fold_builtin_nan (arglist
, type
, true);
8804 case BUILT_IN_NANSF
:
8805 case BUILT_IN_NANSL
:
8806 return fold_builtin_nan (arglist
, type
, false);
8808 case BUILT_IN_FLOOR
:
8809 case BUILT_IN_FLOORF
:
8810 case BUILT_IN_FLOORL
:
8811 return fold_builtin_floor (fndecl
, arglist
);
8814 case BUILT_IN_CEILF
:
8815 case BUILT_IN_CEILL
:
8816 return fold_builtin_ceil (fndecl
, arglist
);
8818 case BUILT_IN_TRUNC
:
8819 case BUILT_IN_TRUNCF
:
8820 case BUILT_IN_TRUNCL
:
8821 return fold_builtin_trunc (fndecl
, arglist
);
8823 case BUILT_IN_ROUND
:
8824 case BUILT_IN_ROUNDF
:
8825 case BUILT_IN_ROUNDL
:
8826 return fold_builtin_round (fndecl
, arglist
);
8828 case BUILT_IN_NEARBYINT
:
8829 case BUILT_IN_NEARBYINTF
:
8830 case BUILT_IN_NEARBYINTL
:
8832 case BUILT_IN_RINTF
:
8833 case BUILT_IN_RINTL
:
8834 return fold_trunc_transparent_mathfn (fndecl
, arglist
);
8836 case BUILT_IN_LCEIL
:
8837 case BUILT_IN_LCEILF
:
8838 case BUILT_IN_LCEILL
:
8839 case BUILT_IN_LLCEIL
:
8840 case BUILT_IN_LLCEILF
:
8841 case BUILT_IN_LLCEILL
:
8842 case BUILT_IN_LFLOOR
:
8843 case BUILT_IN_LFLOORF
:
8844 case BUILT_IN_LFLOORL
:
8845 case BUILT_IN_LLFLOOR
:
8846 case BUILT_IN_LLFLOORF
:
8847 case BUILT_IN_LLFLOORL
:
8848 case BUILT_IN_LROUND
:
8849 case BUILT_IN_LROUNDF
:
8850 case BUILT_IN_LROUNDL
:
8851 case BUILT_IN_LLROUND
:
8852 case BUILT_IN_LLROUNDF
:
8853 case BUILT_IN_LLROUNDL
:
8854 return fold_builtin_int_roundingfn (fndecl
, arglist
);
8856 case BUILT_IN_LRINT
:
8857 case BUILT_IN_LRINTF
:
8858 case BUILT_IN_LRINTL
:
8859 case BUILT_IN_LLRINT
:
8860 case BUILT_IN_LLRINTF
:
8861 case BUILT_IN_LLRINTL
:
8862 return fold_fixed_mathfn (fndecl
, arglist
);
8866 case BUILT_IN_FFSLL
:
8869 case BUILT_IN_CLZLL
:
8872 case BUILT_IN_CTZLL
:
8873 case BUILT_IN_POPCOUNT
:
8874 case BUILT_IN_POPCOUNTL
:
8875 case BUILT_IN_POPCOUNTLL
:
8876 case BUILT_IN_PARITY
:
8877 case BUILT_IN_PARITYL
:
8878 case BUILT_IN_PARITYLL
:
8879 return fold_builtin_bitop (fndecl
, arglist
);
8881 case BUILT_IN_MEMCPY
:
8882 return fold_builtin_memcpy (fndecl
, arglist
);
8884 case BUILT_IN_MEMPCPY
:
8885 return fold_builtin_mempcpy (arglist
, type
, /*endp=*/1);
8887 case BUILT_IN_MEMMOVE
:
8888 return fold_builtin_memmove (arglist
, type
);
8890 case BUILT_IN_SIGNBIT
:
8891 case BUILT_IN_SIGNBITF
:
8892 case BUILT_IN_SIGNBITL
:
8893 return fold_builtin_signbit (fndecl
, arglist
);
8895 case BUILT_IN_ISASCII
:
8896 return fold_builtin_isascii (arglist
);
8898 case BUILT_IN_TOASCII
:
8899 return fold_builtin_toascii (arglist
);
8901 case BUILT_IN_ISDIGIT
:
8902 return fold_builtin_isdigit (arglist
);
8904 case BUILT_IN_COPYSIGN
:
8905 case BUILT_IN_COPYSIGNF
:
8906 case BUILT_IN_COPYSIGNL
:
8907 return fold_builtin_copysign (fndecl
, arglist
, type
);
8909 case BUILT_IN_FINITE
:
8910 case BUILT_IN_FINITEF
:
8911 case BUILT_IN_FINITEL
:
8912 return fold_builtin_classify (fndecl
, arglist
, BUILT_IN_FINITE
);
8914 case BUILT_IN_ISINF
:
8915 case BUILT_IN_ISINFF
:
8916 case BUILT_IN_ISINFL
:
8917 return fold_builtin_classify (fndecl
, arglist
, BUILT_IN_ISINF
);
8919 case BUILT_IN_ISNAN
:
8920 case BUILT_IN_ISNANF
:
8921 case BUILT_IN_ISNANL
:
8922 return fold_builtin_classify (fndecl
, arglist
, BUILT_IN_ISNAN
);
8924 case BUILT_IN_ISGREATER
:
8925 return fold_builtin_unordered_cmp (fndecl
, arglist
, UNLE_EXPR
, LE_EXPR
);
8926 case BUILT_IN_ISGREATEREQUAL
:
8927 return fold_builtin_unordered_cmp (fndecl
, arglist
, UNLT_EXPR
, LT_EXPR
);
8928 case BUILT_IN_ISLESS
:
8929 return fold_builtin_unordered_cmp (fndecl
, arglist
, UNGE_EXPR
, GE_EXPR
);
8930 case BUILT_IN_ISLESSEQUAL
:
8931 return fold_builtin_unordered_cmp (fndecl
, arglist
, UNGT_EXPR
, GT_EXPR
);
8932 case BUILT_IN_ISLESSGREATER
:
8933 return fold_builtin_unordered_cmp (fndecl
, arglist
, UNEQ_EXPR
, EQ_EXPR
);
8934 case BUILT_IN_ISUNORDERED
:
8935 return fold_builtin_unordered_cmp (fndecl
, arglist
, UNORDERED_EXPR
,
8938 /* We do the folding for va_start in the expander. */
8939 case BUILT_IN_VA_START
:
8942 case BUILT_IN_OBJECT_SIZE
:
8943 return fold_builtin_object_size (arglist
);
8944 case BUILT_IN_MEMCPY_CHK
:
8945 case BUILT_IN_MEMPCPY_CHK
:
8946 case BUILT_IN_MEMMOVE_CHK
:
8947 case BUILT_IN_MEMSET_CHK
:
8948 return fold_builtin_memory_chk (fndecl
, arglist
, NULL_TREE
, ignore
,
8949 DECL_FUNCTION_CODE (fndecl
));
8950 case BUILT_IN_STRCPY_CHK
:
8951 case BUILT_IN_STPCPY_CHK
:
8952 return fold_builtin_stxcpy_chk (fndecl
, arglist
, NULL_TREE
, ignore
,
8953 DECL_FUNCTION_CODE (fndecl
));
8954 case BUILT_IN_STRNCPY_CHK
:
8955 return fold_builtin_strncpy_chk (arglist
, NULL_TREE
);
8956 case BUILT_IN_STRCAT_CHK
:
8957 return fold_builtin_strcat_chk (fndecl
, arglist
);
8958 case BUILT_IN_STRNCAT_CHK
:
8959 return fold_builtin_strncat_chk (fndecl
, arglist
);
8960 case BUILT_IN_SPRINTF_CHK
:
8961 case BUILT_IN_VSPRINTF_CHK
:
8962 return fold_builtin_sprintf_chk (arglist
, DECL_FUNCTION_CODE (fndecl
));
8963 case BUILT_IN_SNPRINTF_CHK
:
8964 case BUILT_IN_VSNPRINTF_CHK
:
8965 return fold_builtin_snprintf_chk (arglist
, NULL_TREE
,
8966 DECL_FUNCTION_CODE (fndecl
));
8968 case BUILT_IN_PRINTF
:
8969 case BUILT_IN_PRINTF_UNLOCKED
:
8970 case BUILT_IN_VPRINTF
:
8971 case BUILT_IN_PRINTF_CHK
:
8972 case BUILT_IN_VPRINTF_CHK
:
8973 return fold_builtin_printf (fndecl
, arglist
, ignore
,
8974 DECL_FUNCTION_CODE (fndecl
));
8976 case BUILT_IN_FPRINTF
:
8977 case BUILT_IN_FPRINTF_UNLOCKED
:
8978 case BUILT_IN_VFPRINTF
:
8979 case BUILT_IN_FPRINTF_CHK
:
8980 case BUILT_IN_VFPRINTF_CHK
:
8981 return fold_builtin_fprintf (fndecl
, arglist
, ignore
,
8982 DECL_FUNCTION_CODE (fndecl
));
8991 /* A wrapper function for builtin folding that prevents warnings for
8992 "statement without effect" and the like, caused by removing the
8993 call node earlier than the warning is generated. */
8996 fold_builtin (tree fndecl
, tree arglist
, bool ignore
)
8998 tree exp
= fold_builtin_1 (fndecl
, arglist
, ignore
);
9001 exp
= build1 (NOP_EXPR
, TREE_TYPE (exp
), exp
);
9002 TREE_NO_WARNING (exp
) = 1;
9008 /* Conveniently construct a function call expression. */
9011 build_function_call_expr (tree fn
, tree arglist
)
9015 call_expr
= build1 (ADDR_EXPR
, build_pointer_type (TREE_TYPE (fn
)), fn
);
9016 return fold_build3 (CALL_EXPR
, TREE_TYPE (TREE_TYPE (fn
)),
9017 call_expr
, arglist
, NULL_TREE
);
9020 /* This function validates the types of a function call argument list
9021 represented as a tree chain of parameters against a specified list
9022 of tree_codes. If the last specifier is a 0, that represents an
9023 ellipses, otherwise the last specifier must be a VOID_TYPE. */
9026 validate_arglist (tree arglist
, ...)
9028 enum tree_code code
;
9032 va_start (ap
, arglist
);
9036 code
= va_arg (ap
, enum tree_code
);
9040 /* This signifies an ellipses, any further arguments are all ok. */
9044 /* This signifies an endlink, if no arguments remain, return
9045 true, otherwise return false. */
9049 /* If no parameters remain or the parameter's code does not
9050 match the specified code, return false. Otherwise continue
9051 checking any remaining arguments. */
9054 if (code
== POINTER_TYPE
)
9056 if (! POINTER_TYPE_P (TREE_TYPE (TREE_VALUE (arglist
))))
9059 else if (code
!= TREE_CODE (TREE_TYPE (TREE_VALUE (arglist
))))
9063 arglist
= TREE_CHAIN (arglist
);
9067 /* We need gotos here since we can only have one VA_CLOSE in a
9075 /* Default target-specific builtin expander that does nothing. */
9078 default_expand_builtin (tree exp ATTRIBUTE_UNUSED
,
9079 rtx target ATTRIBUTE_UNUSED
,
9080 rtx subtarget ATTRIBUTE_UNUSED
,
9081 enum machine_mode mode ATTRIBUTE_UNUSED
,
9082 int ignore ATTRIBUTE_UNUSED
)
9087 /* Returns true is EXP represents data that would potentially reside
9088 in a readonly section. */
9091 readonly_data_expr (tree exp
)
9095 if (TREE_CODE (exp
) != ADDR_EXPR
)
9098 exp
= get_base_address (TREE_OPERAND (exp
, 0));
9102 /* Make sure we call decl_readonly_section only for trees it
9103 can handle (since it returns true for everything it doesn't
9105 if (TREE_CODE (exp
) == STRING_CST
9106 || TREE_CODE (exp
) == CONSTRUCTOR
9107 || (TREE_CODE (exp
) == VAR_DECL
&& TREE_STATIC (exp
)))
9108 return decl_readonly_section (exp
, 0);
9113 /* Simplify a call to the strstr builtin.
9115 Return 0 if no simplification was possible, otherwise return the
9116 simplified form of the call as a tree.
9118 The simplified form may be a constant or other expression which
9119 computes the same value, but in a more efficient manner (including
9120 calls to other builtin functions).
9122 The call may contain arguments which need to be evaluated, but
9123 which are not useful to determine the result of the call. In
9124 this case we return a chain of COMPOUND_EXPRs. The LHS of each
9125 COMPOUND_EXPR will be an argument which must be evaluated.
9126 COMPOUND_EXPRs are chained through their RHS. The RHS of the last
9127 COMPOUND_EXPR in the chain will contain the tree for the simplified
9128 form of the builtin function call. */
9131 fold_builtin_strstr (tree arglist
, tree type
)
9133 if (!validate_arglist (arglist
, POINTER_TYPE
, POINTER_TYPE
, VOID_TYPE
))
9137 tree s1
= TREE_VALUE (arglist
), s2
= TREE_VALUE (TREE_CHAIN (arglist
));
9139 const char *p1
, *p2
;
9148 const char *r
= strstr (p1
, p2
);
9152 return build_int_cst (TREE_TYPE (s1
), 0);
9154 /* Return an offset into the constant string argument. */
9155 tem
= fold_build2 (PLUS_EXPR
, TREE_TYPE (s1
),
9156 s1
, build_int_cst (TREE_TYPE (s1
), r
- p1
));
9157 return fold_convert (type
, tem
);
9166 fn
= implicit_built_in_decls
[BUILT_IN_STRCHR
];
9170 /* New argument list transforming strstr(s1, s2) to
9171 strchr(s1, s2[0]). */
9172 arglist
= build_tree_list (NULL_TREE
,
9173 build_int_cst (NULL_TREE
, p2
[0]));
9174 arglist
= tree_cons (NULL_TREE
, s1
, arglist
);
9175 return build_function_call_expr (fn
, arglist
);
9179 /* Simplify a call to the strchr builtin.
9181 Return 0 if no simplification was possible, otherwise return the
9182 simplified form of the call as a tree.
9184 The simplified form may be a constant or other expression which
9185 computes the same value, but in a more efficient manner (including
9186 calls to other builtin functions).
9188 The call may contain arguments which need to be evaluated, but
9189 which are not useful to determine the result of the call. In
9190 this case we return a chain of COMPOUND_EXPRs. The LHS of each
9191 COMPOUND_EXPR will be an argument which must be evaluated.
9192 COMPOUND_EXPRs are chained through their RHS. The RHS of the last
9193 COMPOUND_EXPR in the chain will contain the tree for the simplified
9194 form of the builtin function call. */
9197 fold_builtin_strchr (tree arglist
, tree type
)
9199 if (!validate_arglist (arglist
, POINTER_TYPE
, INTEGER_TYPE
, VOID_TYPE
))
9203 tree s1
= TREE_VALUE (arglist
), s2
= TREE_VALUE (TREE_CHAIN (arglist
));
9206 if (TREE_CODE (s2
) != INTEGER_CST
)
9216 if (target_char_cast (s2
, &c
))
9222 return build_int_cst (TREE_TYPE (s1
), 0);
9224 /* Return an offset into the constant string argument. */
9225 tem
= fold_build2 (PLUS_EXPR
, TREE_TYPE (s1
),
9226 s1
, build_int_cst (TREE_TYPE (s1
), r
- p1
));
9227 return fold_convert (type
, tem
);
9233 /* Simplify a call to the strrchr builtin.
9235 Return 0 if no simplification was possible, otherwise return the
9236 simplified form of the call as a tree.
9238 The simplified form may be a constant or other expression which
9239 computes the same value, but in a more efficient manner (including
9240 calls to other builtin functions).
9242 The call may contain arguments which need to be evaluated, but
9243 which are not useful to determine the result of the call. In
9244 this case we return a chain of COMPOUND_EXPRs. The LHS of each
9245 COMPOUND_EXPR will be an argument which must be evaluated.
9246 COMPOUND_EXPRs are chained through their RHS. The RHS of the last
9247 COMPOUND_EXPR in the chain will contain the tree for the simplified
9248 form of the builtin function call. */
9251 fold_builtin_strrchr (tree arglist
, tree type
)
9253 if (!validate_arglist (arglist
, POINTER_TYPE
, INTEGER_TYPE
, VOID_TYPE
))
9257 tree s1
= TREE_VALUE (arglist
), s2
= TREE_VALUE (TREE_CHAIN (arglist
));
9261 if (TREE_CODE (s2
) != INTEGER_CST
)
9271 if (target_char_cast (s2
, &c
))
9274 r
= strrchr (p1
, c
);
9277 return build_int_cst (TREE_TYPE (s1
), 0);
9279 /* Return an offset into the constant string argument. */
9280 tem
= fold_build2 (PLUS_EXPR
, TREE_TYPE (s1
),
9281 s1
, build_int_cst (TREE_TYPE (s1
), r
- p1
));
9282 return fold_convert (type
, tem
);
9285 if (! integer_zerop (s2
))
9288 fn
= implicit_built_in_decls
[BUILT_IN_STRCHR
];
9292 /* Transform strrchr(s1, '\0') to strchr(s1, '\0'). */
9293 return build_function_call_expr (fn
, arglist
);
9297 /* Simplify a call to the strpbrk builtin.
9299 Return 0 if no simplification was possible, otherwise return the
9300 simplified form of the call as a tree.
9302 The simplified form may be a constant or other expression which
9303 computes the same value, but in a more efficient manner (including
9304 calls to other builtin functions).
9306 The call may contain arguments which need to be evaluated, but
9307 which are not useful to determine the result of the call. In
9308 this case we return a chain of COMPOUND_EXPRs. The LHS of each
9309 COMPOUND_EXPR will be an argument which must be evaluated.
9310 COMPOUND_EXPRs are chained through their RHS. The RHS of the last
9311 COMPOUND_EXPR in the chain will contain the tree for the simplified
9312 form of the builtin function call. */
9315 fold_builtin_strpbrk (tree arglist
, tree type
)
9317 if (!validate_arglist (arglist
, POINTER_TYPE
, POINTER_TYPE
, VOID_TYPE
))
9321 tree s1
= TREE_VALUE (arglist
), s2
= TREE_VALUE (TREE_CHAIN (arglist
));
9323 const char *p1
, *p2
;
9332 const char *r
= strpbrk (p1
, p2
);
9336 return build_int_cst (TREE_TYPE (s1
), 0);
9338 /* Return an offset into the constant string argument. */
9339 tem
= fold_build2 (PLUS_EXPR
, TREE_TYPE (s1
),
9340 s1
, build_int_cst (TREE_TYPE (s1
), r
- p1
));
9341 return fold_convert (type
, tem
);
9345 /* strpbrk(x, "") == NULL.
9346 Evaluate and ignore s1 in case it had side-effects. */
9347 return omit_one_operand (TREE_TYPE (s1
), integer_zero_node
, s1
);
9350 return 0; /* Really call strpbrk. */
9352 fn
= implicit_built_in_decls
[BUILT_IN_STRCHR
];
9356 /* New argument list transforming strpbrk(s1, s2) to
9357 strchr(s1, s2[0]). */
9358 arglist
= build_tree_list (NULL_TREE
,
9359 build_int_cst (NULL_TREE
, p2
[0]));
9360 arglist
= tree_cons (NULL_TREE
, s1
, arglist
);
9361 return build_function_call_expr (fn
, arglist
);
9365 /* Simplify a call to the strcat builtin.
9367 Return 0 if no simplification was possible, otherwise return the
9368 simplified form of the call as a tree.
9370 The simplified form may be a constant or other expression which
9371 computes the same value, but in a more efficient manner (including
9372 calls to other builtin functions).
9374 The call may contain arguments which need to be evaluated, but
9375 which are not useful to determine the result of the call. In
9376 this case we return a chain of COMPOUND_EXPRs. The LHS of each
9377 COMPOUND_EXPR will be an argument which must be evaluated.
9378 COMPOUND_EXPRs are chained through their RHS. The RHS of the last
9379 COMPOUND_EXPR in the chain will contain the tree for the simplified
9380 form of the builtin function call. */
9383 fold_builtin_strcat (tree arglist
)
9385 if (!validate_arglist (arglist
, POINTER_TYPE
, POINTER_TYPE
, VOID_TYPE
))
9389 tree dst
= TREE_VALUE (arglist
),
9390 src
= TREE_VALUE (TREE_CHAIN (arglist
));
9391 const char *p
= c_getstr (src
);
9393 /* If the string length is zero, return the dst parameter. */
9394 if (p
&& *p
== '\0')
9401 /* Simplify a call to the strncat builtin.
9403 Return 0 if no simplification was possible, otherwise return the
9404 simplified form of the call as a tree.
9406 The simplified form may be a constant or other expression which
9407 computes the same value, but in a more efficient manner (including
9408 calls to other builtin functions).
9410 The call may contain arguments which need to be evaluated, but
9411 which are not useful to determine the result of the call. In
9412 this case we return a chain of COMPOUND_EXPRs. The LHS of each
9413 COMPOUND_EXPR will be an argument which must be evaluated.
9414 COMPOUND_EXPRs are chained through their RHS. The RHS of the last
9415 COMPOUND_EXPR in the chain will contain the tree for the simplified
9416 form of the builtin function call. */
9419 fold_builtin_strncat (tree arglist
)
9421 if (!validate_arglist (arglist
,
9422 POINTER_TYPE
, POINTER_TYPE
, INTEGER_TYPE
, VOID_TYPE
))
9426 tree dst
= TREE_VALUE (arglist
);
9427 tree src
= TREE_VALUE (TREE_CHAIN (arglist
));
9428 tree len
= TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist
)));
9429 const char *p
= c_getstr (src
);
9431 /* If the requested length is zero, or the src parameter string
9432 length is zero, return the dst parameter. */
9433 if (integer_zerop (len
) || (p
&& *p
== '\0'))
9434 return omit_two_operands (TREE_TYPE (dst
), dst
, src
, len
);
9436 /* If the requested len is greater than or equal to the string
9437 length, call strcat. */
9438 if (TREE_CODE (len
) == INTEGER_CST
&& p
9439 && compare_tree_int (len
, strlen (p
)) >= 0)
9442 = tree_cons (NULL_TREE
, dst
, build_tree_list (NULL_TREE
, src
));
9443 tree fn
= implicit_built_in_decls
[BUILT_IN_STRCAT
];
9445 /* If the replacement _DECL isn't initialized, don't do the
9450 return build_function_call_expr (fn
, newarglist
);
9456 /* Simplify a call to the strspn builtin.
9458 Return 0 if no simplification was possible, otherwise return the
9459 simplified form of the call as a tree.
9461 The simplified form may be a constant or other expression which
9462 computes the same value, but in a more efficient manner (including
9463 calls to other builtin functions).
9465 The call may contain arguments which need to be evaluated, but
9466 which are not useful to determine the result of the call. In
9467 this case we return a chain of COMPOUND_EXPRs. The LHS of each
9468 COMPOUND_EXPR will be an argument which must be evaluated.
9469 COMPOUND_EXPRs are chained through their RHS. The RHS of the last
9470 COMPOUND_EXPR in the chain will contain the tree for the simplified
9471 form of the builtin function call. */
9474 fold_builtin_strspn (tree arglist
)
9476 if (!validate_arglist (arglist
, POINTER_TYPE
, POINTER_TYPE
, VOID_TYPE
))
9480 tree s1
= TREE_VALUE (arglist
), s2
= TREE_VALUE (TREE_CHAIN (arglist
));
9481 const char *p1
= c_getstr (s1
), *p2
= c_getstr (s2
);
9483 /* If both arguments are constants, evaluate at compile-time. */
9486 const size_t r
= strspn (p1
, p2
);
9487 return size_int (r
);
9490 /* If either argument is "", return 0. */
9491 if ((p1
&& *p1
== '\0') || (p2
&& *p2
== '\0'))
9492 /* Evaluate and ignore both arguments in case either one has
9494 return omit_two_operands (integer_type_node
, integer_zero_node
,
9500 /* Simplify a call to the strcspn builtin.
9502 Return 0 if no simplification was possible, otherwise return the
9503 simplified form of the call as a tree.
9505 The simplified form may be a constant or other expression which
9506 computes the same value, but in a more efficient manner (including
9507 calls to other builtin functions).
9509 The call may contain arguments which need to be evaluated, but
9510 which are not useful to determine the result of the call. In
9511 this case we return a chain of COMPOUND_EXPRs. The LHS of each
9512 COMPOUND_EXPR will be an argument which must be evaluated.
9513 COMPOUND_EXPRs are chained through their RHS. The RHS of the last
9514 COMPOUND_EXPR in the chain will contain the tree for the simplified
9515 form of the builtin function call. */
9518 fold_builtin_strcspn (tree arglist
)
9520 if (!validate_arglist (arglist
, POINTER_TYPE
, POINTER_TYPE
, VOID_TYPE
))
9524 tree s1
= TREE_VALUE (arglist
), s2
= TREE_VALUE (TREE_CHAIN (arglist
));
9525 const char *p1
= c_getstr (s1
), *p2
= c_getstr (s2
);
9527 /* If both arguments are constants, evaluate at compile-time. */
9530 const size_t r
= strcspn (p1
, p2
);
9531 return size_int (r
);
9534 /* If the first argument is "", return 0. */
9535 if (p1
&& *p1
== '\0')
9537 /* Evaluate and ignore argument s2 in case it has
9539 return omit_one_operand (integer_type_node
,
9540 integer_zero_node
, s2
);
9543 /* If the second argument is "", return __builtin_strlen(s1). */
9544 if (p2
&& *p2
== '\0')
9546 tree newarglist
= build_tree_list (NULL_TREE
, s1
),
9547 fn
= implicit_built_in_decls
[BUILT_IN_STRLEN
];
9549 /* If the replacement _DECL isn't initialized, don't do the
9554 return build_function_call_expr (fn
, newarglist
);
9560 /* Fold a call to the fputs builtin. IGNORE is true if the value returned
9561 by the builtin will be ignored. UNLOCKED is true is true if this
9562 actually a call to fputs_unlocked. If LEN in non-NULL, it represents
9563 the known length of the string. Return NULL_TREE if no simplification
9567 fold_builtin_fputs (tree arglist
, bool ignore
, bool unlocked
, tree len
)
9570 tree fn_fputc
= unlocked
? implicit_built_in_decls
[BUILT_IN_FPUTC_UNLOCKED
]
9571 : implicit_built_in_decls
[BUILT_IN_FPUTC
];
9572 tree fn_fwrite
= unlocked
? implicit_built_in_decls
[BUILT_IN_FWRITE_UNLOCKED
]
9573 : implicit_built_in_decls
[BUILT_IN_FWRITE
];
9575 /* If the return value is used, or the replacement _DECL isn't
9576 initialized, don't do the transformation. */
9577 if (!ignore
|| !fn_fputc
|| !fn_fwrite
)
9580 /* Verify the arguments in the original call. */
9581 if (!validate_arglist (arglist
, POINTER_TYPE
, POINTER_TYPE
, VOID_TYPE
))
9585 len
= c_strlen (TREE_VALUE (arglist
), 0);
9587 /* Get the length of the string passed to fputs. If the length
9588 can't be determined, punt. */
9590 || TREE_CODE (len
) != INTEGER_CST
)
9593 switch (compare_tree_int (len
, 1))
9595 case -1: /* length is 0, delete the call entirely . */
9596 return omit_one_operand (integer_type_node
, integer_zero_node
,
9597 TREE_VALUE (TREE_CHAIN (arglist
)));
9599 case 0: /* length is 1, call fputc. */
9601 const char *p
= c_getstr (TREE_VALUE (arglist
));
9605 /* New argument list transforming fputs(string, stream) to
9606 fputc(string[0], stream). */
9607 arglist
= build_tree_list (NULL_TREE
,
9608 TREE_VALUE (TREE_CHAIN (arglist
)));
9609 arglist
= tree_cons (NULL_TREE
,
9610 build_int_cst (NULL_TREE
, p
[0]),
9617 case 1: /* length is greater than 1, call fwrite. */
9621 /* If optimizing for size keep fputs. */
9624 string_arg
= TREE_VALUE (arglist
);
9625 /* New argument list transforming fputs(string, stream) to
9626 fwrite(string, 1, len, stream). */
9627 arglist
= build_tree_list (NULL_TREE
,
9628 TREE_VALUE (TREE_CHAIN (arglist
)));
9629 arglist
= tree_cons (NULL_TREE
, len
, arglist
);
9630 arglist
= tree_cons (NULL_TREE
, size_one_node
, arglist
);
9631 arglist
= tree_cons (NULL_TREE
, string_arg
, arglist
);
9639 /* These optimizations are only performed when the result is ignored,
9640 hence there's no need to cast the result to integer_type_node. */
9641 return build_function_call_expr (fn
, arglist
);
9644 /* Fold the new_arg's arguments (ARGLIST). Returns true if there was an error
9645 produced. False otherwise. This is done so that we don't output the error
9646 or warning twice or three times. */
9648 fold_builtin_next_arg (tree arglist
)
9650 tree fntype
= TREE_TYPE (current_function_decl
);
9652 if (TYPE_ARG_TYPES (fntype
) == 0
9653 || (TREE_VALUE (tree_last (TYPE_ARG_TYPES (fntype
)))
9656 error ("%<va_start%> used in function with fixed args");
9661 /* Evidently an out of date version of <stdarg.h>; can't validate
9662 va_start's second argument, but can still work as intended. */
9663 warning (0, "%<__builtin_next_arg%> called without an argument");
9666 /* We use __builtin_va_start (ap, 0, 0) or __builtin_next_arg (0, 0)
9667 when we checked the arguments and if needed issued a warning. */
9668 else if (!TREE_CHAIN (arglist
)
9669 || !integer_zerop (TREE_VALUE (arglist
))
9670 || !integer_zerop (TREE_VALUE (TREE_CHAIN (arglist
)))
9671 || TREE_CHAIN (TREE_CHAIN (arglist
)))
9673 tree last_parm
= tree_last (DECL_ARGUMENTS (current_function_decl
));
9674 tree arg
= TREE_VALUE (arglist
);
9676 if (TREE_CHAIN (arglist
))
9678 error ("%<va_start%> used with too many arguments");
9682 /* Strip off all nops for the sake of the comparison. This
9683 is not quite the same as STRIP_NOPS. It does more.
9684 We must also strip off INDIRECT_EXPR for C++ reference
9686 while (TREE_CODE (arg
) == NOP_EXPR
9687 || TREE_CODE (arg
) == CONVERT_EXPR
9688 || TREE_CODE (arg
) == NON_LVALUE_EXPR
9689 || TREE_CODE (arg
) == INDIRECT_REF
)
9690 arg
= TREE_OPERAND (arg
, 0);
9691 if (arg
!= last_parm
)
9693 /* FIXME: Sometimes with the tree optimizers we can get the
9694 not the last argument even though the user used the last
9695 argument. We just warn and set the arg to be the last
9696 argument so that we will get wrong-code because of
9698 warning (0, "second parameter of %<va_start%> not last named argument");
9700 /* We want to verify the second parameter just once before the tree
9701 optimizers are run and then avoid keeping it in the tree,
9702 as otherwise we could warn even for correct code like:
9703 void foo (int i, ...)
9704 { va_list ap; i++; va_start (ap, i); va_end (ap); } */
9705 TREE_VALUE (arglist
) = integer_zero_node
;
9706 TREE_CHAIN (arglist
) = build_tree_list (NULL
, integer_zero_node
);
9712 /* Simplify a call to the sprintf builtin.
9714 Return 0 if no simplification was possible, otherwise return the
9715 simplified form of the call as a tree. If IGNORED is true, it means that
9716 the caller does not use the returned value of the function. */
9719 fold_builtin_sprintf (tree arglist
, int ignored
)
9721 tree call
, retval
, dest
, fmt
;
9722 const char *fmt_str
= NULL
;
9724 /* Verify the required arguments in the original call. We deal with two
9725 types of sprintf() calls: 'sprintf (str, fmt)' and
9726 'sprintf (dest, "%s", orig)'. */
9727 if (!validate_arglist (arglist
, POINTER_TYPE
, POINTER_TYPE
, VOID_TYPE
)
9728 && !validate_arglist (arglist
, POINTER_TYPE
, POINTER_TYPE
, POINTER_TYPE
,
9732 /* Get the destination string and the format specifier. */
9733 dest
= TREE_VALUE (arglist
);
9734 fmt
= TREE_VALUE (TREE_CHAIN (arglist
));
9736 /* Check whether the format is a literal string constant. */
9737 fmt_str
= c_getstr (fmt
);
9738 if (fmt_str
== NULL
)
9744 /* If the format doesn't contain % args or %%, use strcpy. */
9745 if (strchr (fmt_str
, '%') == NULL
)
9747 tree fn
= implicit_built_in_decls
[BUILT_IN_STRCPY
];
9752 /* Convert sprintf (str, fmt) into strcpy (str, fmt) when
9753 'format' is known to contain no % formats. */
9754 arglist
= build_tree_list (NULL_TREE
, fmt
);
9755 arglist
= tree_cons (NULL_TREE
, dest
, arglist
);
9756 call
= build_function_call_expr (fn
, arglist
);
9758 retval
= build_int_cst (NULL_TREE
, strlen (fmt_str
));
9761 /* If the format is "%s", use strcpy if the result isn't used. */
9762 else if (fmt_str
&& strcmp (fmt_str
, "%s") == 0)
9765 fn
= implicit_built_in_decls
[BUILT_IN_STRCPY
];
9770 /* Convert sprintf (str1, "%s", str2) into strcpy (str1, str2). */
9771 orig
= TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist
)));
9772 arglist
= build_tree_list (NULL_TREE
, orig
);
9773 arglist
= tree_cons (NULL_TREE
, dest
, arglist
);
9776 retval
= c_strlen (orig
, 1);
9777 if (!retval
|| TREE_CODE (retval
) != INTEGER_CST
)
9780 call
= build_function_call_expr (fn
, arglist
);
9786 (TREE_TYPE (TREE_TYPE (implicit_built_in_decls
[BUILT_IN_SPRINTF
])),
9788 return build2 (COMPOUND_EXPR
, TREE_TYPE (retval
), call
, retval
);
9794 /* Expand a call to __builtin_object_size. */
9797 expand_builtin_object_size (tree exp
)
9800 int object_size_type
;
9801 tree fndecl
= get_callee_fndecl (exp
);
9802 tree arglist
= TREE_OPERAND (exp
, 1);
9803 location_t locus
= EXPR_LOCATION (exp
);
9805 if (!validate_arglist (arglist
, POINTER_TYPE
, INTEGER_TYPE
, VOID_TYPE
))
9807 error ("%Hfirst argument of %D must be a pointer, second integer constant",
9809 expand_builtin_trap ();
9813 ost
= TREE_VALUE (TREE_CHAIN (arglist
));
9816 if (TREE_CODE (ost
) != INTEGER_CST
9817 || tree_int_cst_sgn (ost
) < 0
9818 || compare_tree_int (ost
, 3) > 0)
9820 error ("%Hlast argument of %D is not integer constant between 0 and 3",
9822 expand_builtin_trap ();
9826 object_size_type
= tree_low_cst (ost
, 0);
9828 return object_size_type
< 2 ? constm1_rtx
: const0_rtx
;
9831 /* Expand EXP, a call to the __mem{cpy,pcpy,move,set}_chk builtin.
9832 FCODE is the BUILT_IN_* to use.
9833 Return 0 if we failed; the caller should emit a normal call,
9834 otherwise try to get the result in TARGET, if convenient (and in
9835 mode MODE if that's convenient). */
9838 expand_builtin_memory_chk (tree exp
, rtx target
, enum machine_mode mode
,
9839 enum built_in_function fcode
)
9841 tree arglist
= TREE_OPERAND (exp
, 1);
9842 tree dest
, src
, len
, size
;
9844 if (!validate_arglist (arglist
,
9846 fcode
== BUILT_IN_MEMSET_CHK
9847 ? INTEGER_TYPE
: POINTER_TYPE
,
9848 INTEGER_TYPE
, INTEGER_TYPE
, VOID_TYPE
))
9851 dest
= TREE_VALUE (arglist
);
9852 src
= TREE_VALUE (TREE_CHAIN (arglist
));
9853 len
= TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist
)));
9854 size
= TREE_VALUE (TREE_CHAIN (TREE_CHAIN (TREE_CHAIN (arglist
))));
9856 if (! host_integerp (size
, 1))
9859 if (host_integerp (len
, 1) || integer_all_onesp (size
))
9863 if (! integer_all_onesp (size
) && tree_int_cst_lt (size
, len
))
9865 location_t locus
= EXPR_LOCATION (exp
);
9866 warning (0, "%Hcall to %D will always overflow destination buffer",
9867 &locus
, get_callee_fndecl (exp
));
9871 arglist
= build_tree_list (NULL_TREE
, len
);
9872 arglist
= tree_cons (NULL_TREE
, src
, arglist
);
9873 arglist
= tree_cons (NULL_TREE
, dest
, arglist
);
9876 /* If __builtin_mem{cpy,pcpy,move,set}_chk is used, assume
9877 mem{cpy,pcpy,move,set} is available. */
9880 case BUILT_IN_MEMCPY_CHK
:
9881 fn
= built_in_decls
[BUILT_IN_MEMCPY
];
9883 case BUILT_IN_MEMPCPY_CHK
:
9884 fn
= built_in_decls
[BUILT_IN_MEMPCPY
];
9886 case BUILT_IN_MEMMOVE_CHK
:
9887 fn
= built_in_decls
[BUILT_IN_MEMMOVE
];
9889 case BUILT_IN_MEMSET_CHK
:
9890 fn
= built_in_decls
[BUILT_IN_MEMSET
];
9899 fn
= build_function_call_expr (fn
, arglist
);
9900 if (TREE_CODE (fn
) == CALL_EXPR
)
9901 CALL_EXPR_TAILCALL (fn
) = CALL_EXPR_TAILCALL (exp
);
9902 return expand_expr (fn
, target
, mode
, EXPAND_NORMAL
);
9904 else if (fcode
== BUILT_IN_MEMSET_CHK
)
9908 unsigned int dest_align
9909 = get_pointer_alignment (dest
, BIGGEST_ALIGNMENT
);
9911 /* If DEST is not a pointer type, call the normal function. */
9912 if (dest_align
== 0)
9915 /* If SRC and DEST are the same (and not volatile), do nothing. */
9916 if (operand_equal_p (src
, dest
, 0))
9920 if (fcode
!= BUILT_IN_MEMPCPY_CHK
)
9922 /* Evaluate and ignore LEN in case it has side-effects. */
9923 expand_expr (len
, const0_rtx
, VOIDmode
, EXPAND_NORMAL
);
9924 return expand_expr (dest
, target
, mode
, EXPAND_NORMAL
);
9927 len
= fold_convert (TREE_TYPE (dest
), len
);
9928 expr
= fold_build2 (PLUS_EXPR
, TREE_TYPE (dest
), dest
, len
);
9929 return expand_expr (expr
, target
, mode
, EXPAND_NORMAL
);
9932 /* __memmove_chk special case. */
9933 if (fcode
== BUILT_IN_MEMMOVE_CHK
)
9935 unsigned int src_align
9936 = get_pointer_alignment (src
, BIGGEST_ALIGNMENT
);
9941 /* If src is categorized for a readonly section we can use
9942 normal __memcpy_chk. */
9943 if (readonly_data_expr (src
))
9945 tree fn
= built_in_decls
[BUILT_IN_MEMCPY_CHK
];
9948 fn
= build_function_call_expr (fn
, arglist
);
9949 if (TREE_CODE (fn
) == CALL_EXPR
)
9950 CALL_EXPR_TAILCALL (fn
) = CALL_EXPR_TAILCALL (exp
);
9951 return expand_expr (fn
, target
, mode
, EXPAND_NORMAL
);
9958 /* Emit warning if a buffer overflow is detected at compile time. */
9961 maybe_emit_chk_warning (tree exp
, enum built_in_function fcode
)
9963 int arg_mask
, is_strlen
= 0;
9964 tree arglist
= TREE_OPERAND (exp
, 1), a
;
9970 case BUILT_IN_STRCPY_CHK
:
9971 case BUILT_IN_STPCPY_CHK
:
9972 /* For __strcat_chk the warning will be emitted only if overflowing
9973 by at least strlen (dest) + 1 bytes. */
9974 case BUILT_IN_STRCAT_CHK
:
9978 case BUILT_IN_STRNCPY_CHK
:
9981 case BUILT_IN_SNPRINTF_CHK
:
9982 case BUILT_IN_VSNPRINTF_CHK
:
9991 for (a
= arglist
; a
&& arg_mask
; a
= TREE_CHAIN (a
), arg_mask
>>= 1)
10003 len
= TREE_VALUE (len
);
10004 size
= TREE_VALUE (size
);
10006 if (! host_integerp (size
, 1) || integer_all_onesp (size
))
10011 len
= c_strlen (len
, 1);
10012 if (! len
|| ! host_integerp (len
, 1) || tree_int_cst_lt (len
, size
))
10015 else if (! host_integerp (len
, 1) || ! tree_int_cst_lt (size
, len
))
10018 locus
= EXPR_LOCATION (exp
);
10019 warning (0, "%Hcall to %D will always overflow destination buffer",
10020 &locus
, get_callee_fndecl (exp
));
10023 /* Emit warning if a buffer overflow is detected at compile time
10024 in __sprintf_chk/__vsprintf_chk calls. */
10027 maybe_emit_sprintf_chk_warning (tree exp
, enum built_in_function fcode
)
10029 tree arglist
= TREE_OPERAND (exp
, 1);
10030 tree dest
, size
, len
, fmt
, flag
;
10031 const char *fmt_str
;
10033 /* Verify the required arguments in the original call. */
10036 dest
= TREE_VALUE (arglist
);
10037 arglist
= TREE_CHAIN (arglist
);
10040 flag
= TREE_VALUE (arglist
);
10041 arglist
= TREE_CHAIN (arglist
);
10044 size
= TREE_VALUE (arglist
);
10045 arglist
= TREE_CHAIN (arglist
);
10048 fmt
= TREE_VALUE (arglist
);
10049 arglist
= TREE_CHAIN (arglist
);
10051 if (! host_integerp (size
, 1) || integer_all_onesp (size
))
10054 /* Check whether the format is a literal string constant. */
10055 fmt_str
= c_getstr (fmt
);
10056 if (fmt_str
== NULL
)
10059 /* If the format doesn't contain % args or %%, we know its size. */
10060 if (strchr (fmt_str
, '%') == 0)
10061 len
= build_int_cstu (size_type_node
, strlen (fmt_str
));
10062 /* If the format is "%s" and first ... argument is a string literal,
10064 else if (fcode
== BUILT_IN_SPRINTF_CHK
&& strcmp (fmt_str
, "%s") == 0)
10070 arg
= TREE_VALUE (arglist
);
10071 if (! POINTER_TYPE_P (TREE_TYPE (arg
)))
10074 len
= c_strlen (arg
, 1);
10075 if (!len
|| ! host_integerp (len
, 1))
10081 if (! tree_int_cst_lt (len
, size
))
10083 location_t locus
= EXPR_LOCATION (exp
);
10084 warning (0, "%Hcall to %D will always overflow destination buffer",
10085 &locus
, get_callee_fndecl (exp
));
10089 /* Fold a call to __builtin_object_size, if possible. */
10092 fold_builtin_object_size (tree arglist
)
10094 tree ptr
, ost
, ret
= 0;
10095 int object_size_type
;
10097 if (!validate_arglist (arglist
, POINTER_TYPE
, INTEGER_TYPE
, VOID_TYPE
))
10100 ptr
= TREE_VALUE (arglist
);
10101 ost
= TREE_VALUE (TREE_CHAIN (arglist
));
10104 if (TREE_CODE (ost
) != INTEGER_CST
10105 || tree_int_cst_sgn (ost
) < 0
10106 || compare_tree_int (ost
, 3) > 0)
10109 object_size_type
= tree_low_cst (ost
, 0);
10111 /* __builtin_object_size doesn't evaluate side-effects in its arguments;
10112 if there are any side-effects, it returns (size_t) -1 for types 0 and 1
10113 and (size_t) 0 for types 2 and 3. */
10114 if (TREE_SIDE_EFFECTS (ptr
))
10115 return fold_convert (size_type_node
,
10116 object_size_type
< 2
10117 ? integer_minus_one_node
: integer_zero_node
);
10119 if (TREE_CODE (ptr
) == ADDR_EXPR
)
10120 ret
= build_int_cstu (size_type_node
,
10121 compute_builtin_object_size (ptr
, object_size_type
));
10123 else if (TREE_CODE (ptr
) == SSA_NAME
)
10125 unsigned HOST_WIDE_INT bytes
;
10127 /* If object size is not known yet, delay folding until
10128 later. Maybe subsequent passes will help determining
10130 bytes
= compute_builtin_object_size (ptr
, object_size_type
);
10131 if (bytes
!= (unsigned HOST_WIDE_INT
) (object_size_type
< 2
10133 ret
= build_int_cstu (size_type_node
, bytes
);
10138 ret
= force_fit_type (ret
, -1, false, false);
10139 if (TREE_CONSTANT_OVERFLOW (ret
))
10146 /* Fold a call to the __mem{cpy,pcpy,move,set}_chk builtin.
10147 IGNORE is true, if return value can be ignored. FCODE is the BUILT_IN_*
10148 code of the builtin. If MAXLEN is not NULL, it is maximum length
10149 passed as third argument. */
10152 fold_builtin_memory_chk (tree fndecl
, tree arglist
, tree maxlen
, bool ignore
,
10153 enum built_in_function fcode
)
10155 tree dest
, src
, len
, size
, fn
;
10157 if (!validate_arglist (arglist
,
10159 fcode
== BUILT_IN_MEMSET_CHK
10160 ? INTEGER_TYPE
: POINTER_TYPE
,
10161 INTEGER_TYPE
, INTEGER_TYPE
, VOID_TYPE
))
10164 dest
= TREE_VALUE (arglist
);
10165 /* Actually val for __memset_chk, but it doesn't matter. */
10166 src
= TREE_VALUE (TREE_CHAIN (arglist
));
10167 len
= TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist
)));
10168 size
= TREE_VALUE (TREE_CHAIN (TREE_CHAIN (TREE_CHAIN (arglist
))));
10170 /* If SRC and DEST are the same (and not volatile), return DEST
10171 (resp. DEST+LEN for __mempcpy_chk). */
10172 if (fcode
!= BUILT_IN_MEMSET_CHK
&& operand_equal_p (src
, dest
, 0))
10174 if (fcode
!= BUILT_IN_MEMPCPY_CHK
)
10175 return omit_one_operand (TREE_TYPE (TREE_TYPE (fndecl
)), dest
, len
);
10178 tree temp
= fold_convert (TREE_TYPE (dest
), len
);
10179 temp
= fold_build2 (PLUS_EXPR
, TREE_TYPE (dest
), dest
, temp
);
10180 return fold_convert (TREE_TYPE (TREE_TYPE (fndecl
)), temp
);
10184 if (! host_integerp (size
, 1))
10187 if (! integer_all_onesp (size
))
10189 if (! host_integerp (len
, 1))
10191 /* If LEN is not constant, try MAXLEN too.
10192 For MAXLEN only allow optimizing into non-_ocs function
10193 if SIZE is >= MAXLEN, never convert to __ocs_fail (). */
10194 if (maxlen
== NULL_TREE
|| ! host_integerp (maxlen
, 1))
10196 if (fcode
== BUILT_IN_MEMPCPY_CHK
&& ignore
)
10198 /* (void) __mempcpy_chk () can be optimized into
10199 (void) __memcpy_chk (). */
10200 fn
= built_in_decls
[BUILT_IN_MEMCPY_CHK
];
10204 return build_function_call_expr (fn
, arglist
);
10212 if (tree_int_cst_lt (size
, maxlen
))
10216 arglist
= build_tree_list (NULL_TREE
, len
);
10217 arglist
= tree_cons (NULL_TREE
, src
, arglist
);
10218 arglist
= tree_cons (NULL_TREE
, dest
, arglist
);
10221 /* If __builtin_mem{cpy,pcpy,move,set}_chk is used, assume
10222 mem{cpy,pcpy,move,set} is available. */
10225 case BUILT_IN_MEMCPY_CHK
:
10226 fn
= built_in_decls
[BUILT_IN_MEMCPY
];
10228 case BUILT_IN_MEMPCPY_CHK
:
10229 fn
= built_in_decls
[BUILT_IN_MEMPCPY
];
10231 case BUILT_IN_MEMMOVE_CHK
:
10232 fn
= built_in_decls
[BUILT_IN_MEMMOVE
];
10234 case BUILT_IN_MEMSET_CHK
:
10235 fn
= built_in_decls
[BUILT_IN_MEMSET
];
10244 return build_function_call_expr (fn
, arglist
);
10247 /* Fold a call to the __st[rp]cpy_chk builtin.
10248 IGNORE is true, if return value can be ignored. FCODE is the BUILT_IN_*
10249 code of the builtin. If MAXLEN is not NULL, it is maximum length of
10250 strings passed as second argument. */
10253 fold_builtin_stxcpy_chk (tree fndecl
, tree arglist
, tree maxlen
, bool ignore
,
10254 enum built_in_function fcode
)
10256 tree dest
, src
, size
, len
, fn
;
10258 if (!validate_arglist (arglist
, POINTER_TYPE
, POINTER_TYPE
, INTEGER_TYPE
,
10262 dest
= TREE_VALUE (arglist
);
10263 src
= TREE_VALUE (TREE_CHAIN (arglist
));
10264 size
= TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist
)));
10266 /* If SRC and DEST are the same (and not volatile), return DEST. */
10267 if (fcode
== BUILT_IN_STRCPY_CHK
&& operand_equal_p (src
, dest
, 0))
10268 return fold_convert (TREE_TYPE (TREE_TYPE (fndecl
)), dest
);
10270 if (! host_integerp (size
, 1))
10273 if (! integer_all_onesp (size
))
10275 len
= c_strlen (src
, 1);
10276 if (! len
|| ! host_integerp (len
, 1))
10278 /* If LEN is not constant, try MAXLEN too.
10279 For MAXLEN only allow optimizing into non-_ocs function
10280 if SIZE is >= MAXLEN, never convert to __ocs_fail (). */
10281 if (maxlen
== NULL_TREE
|| ! host_integerp (maxlen
, 1))
10283 if (fcode
== BUILT_IN_STPCPY_CHK
)
10288 /* If return value of __stpcpy_chk is ignored,
10289 optimize into __strcpy_chk. */
10290 fn
= built_in_decls
[BUILT_IN_STRCPY_CHK
];
10294 return build_function_call_expr (fn
, arglist
);
10297 if (! len
|| TREE_SIDE_EFFECTS (len
))
10300 /* If c_strlen returned something, but not a constant,
10301 transform __strcpy_chk into __memcpy_chk. */
10302 fn
= built_in_decls
[BUILT_IN_MEMCPY_CHK
];
10306 len
= size_binop (PLUS_EXPR
, len
, ssize_int (1));
10307 arglist
= build_tree_list (NULL_TREE
, size
);
10308 arglist
= tree_cons (NULL_TREE
, len
, arglist
);
10309 arglist
= tree_cons (NULL_TREE
, src
, arglist
);
10310 arglist
= tree_cons (NULL_TREE
, dest
, arglist
);
10311 return fold_convert (TREE_TYPE (TREE_TYPE (fndecl
)),
10312 build_function_call_expr (fn
, arglist
));
10318 if (! tree_int_cst_lt (maxlen
, size
))
10322 arglist
= build_tree_list (NULL_TREE
, src
);
10323 arglist
= tree_cons (NULL_TREE
, dest
, arglist
);
10325 /* If __builtin_st{r,p}cpy_chk is used, assume st{r,p}cpy is available. */
10326 fn
= built_in_decls
[fcode
== BUILT_IN_STPCPY_CHK
10327 ? BUILT_IN_STPCPY
: BUILT_IN_STRCPY
];
10331 return build_function_call_expr (fn
, arglist
);
10334 /* Fold a call to the __strncpy_chk builtin.
10335 If MAXLEN is not NULL, it is maximum length passed as third argument. */
10338 fold_builtin_strncpy_chk (tree arglist
, tree maxlen
)
10340 tree dest
, src
, size
, len
, fn
;
10342 if (!validate_arglist (arglist
, POINTER_TYPE
, POINTER_TYPE
, INTEGER_TYPE
,
10343 INTEGER_TYPE
, VOID_TYPE
))
10346 dest
= TREE_VALUE (arglist
);
10347 src
= TREE_VALUE (TREE_CHAIN (arglist
));
10348 len
= TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist
)));
10349 size
= TREE_VALUE (TREE_CHAIN (TREE_CHAIN (TREE_CHAIN (arglist
))));
10351 if (! host_integerp (size
, 1))
10354 if (! integer_all_onesp (size
))
10356 if (! host_integerp (len
, 1))
10358 /* If LEN is not constant, try MAXLEN too.
10359 For MAXLEN only allow optimizing into non-_ocs function
10360 if SIZE is >= MAXLEN, never convert to __ocs_fail (). */
10361 if (maxlen
== NULL_TREE
|| ! host_integerp (maxlen
, 1))
10367 if (tree_int_cst_lt (size
, maxlen
))
10371 arglist
= build_tree_list (NULL_TREE
, len
);
10372 arglist
= tree_cons (NULL_TREE
, src
, arglist
);
10373 arglist
= tree_cons (NULL_TREE
, dest
, arglist
);
10375 /* If __builtin_strncpy_chk is used, assume strncpy is available. */
10376 fn
= built_in_decls
[BUILT_IN_STRNCPY
];
10380 return build_function_call_expr (fn
, arglist
);
10383 /* Fold a call to the __strcat_chk builtin FNDECL with ARGLIST. */
10386 fold_builtin_strcat_chk (tree fndecl
, tree arglist
)
10388 tree dest
, src
, size
, fn
;
10391 if (!validate_arglist (arglist
, POINTER_TYPE
, POINTER_TYPE
, INTEGER_TYPE
,
10395 dest
= TREE_VALUE (arglist
);
10396 src
= TREE_VALUE (TREE_CHAIN (arglist
));
10397 size
= TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist
)));
10399 p
= c_getstr (src
);
10400 /* If the SRC parameter is "", return DEST. */
10401 if (p
&& *p
== '\0')
10402 return omit_one_operand (TREE_TYPE (TREE_TYPE (fndecl
)), dest
, src
);
10404 if (! host_integerp (size
, 1) || ! integer_all_onesp (size
))
10407 arglist
= build_tree_list (NULL_TREE
, src
);
10408 arglist
= tree_cons (NULL_TREE
, dest
, arglist
);
10410 /* If __builtin_strcat_chk is used, assume strcat is available. */
10411 fn
= built_in_decls
[BUILT_IN_STRCAT
];
10415 return build_function_call_expr (fn
, arglist
);
10418 /* Fold a call to the __strncat_chk builtin EXP. */
10421 fold_builtin_strncat_chk (tree fndecl
, tree arglist
)
10423 tree dest
, src
, size
, len
, fn
;
10426 if (!validate_arglist (arglist
, POINTER_TYPE
, POINTER_TYPE
, INTEGER_TYPE
,
10427 INTEGER_TYPE
, VOID_TYPE
))
10430 dest
= TREE_VALUE (arglist
);
10431 src
= TREE_VALUE (TREE_CHAIN (arglist
));
10432 len
= TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist
)));
10433 size
= TREE_VALUE (TREE_CHAIN (TREE_CHAIN (TREE_CHAIN (arglist
))));
10435 p
= c_getstr (src
);
10436 /* If the SRC parameter is "" or if LEN is 0, return DEST. */
10437 if (p
&& *p
== '\0')
10438 return omit_one_operand (TREE_TYPE (TREE_TYPE (fndecl
)), dest
, len
);
10439 else if (integer_zerop (len
))
10440 return omit_one_operand (TREE_TYPE (TREE_TYPE (fndecl
)), dest
, src
);
10442 if (! host_integerp (size
, 1))
10445 if (! integer_all_onesp (size
))
10447 tree src_len
= c_strlen (src
, 1);
10449 && host_integerp (src_len
, 1)
10450 && host_integerp (len
, 1)
10451 && ! tree_int_cst_lt (len
, src_len
))
10453 /* If LEN >= strlen (SRC), optimize into __strcat_chk. */
10454 fn
= built_in_decls
[BUILT_IN_STRCAT_CHK
];
10458 arglist
= build_tree_list (NULL_TREE
, size
);
10459 arglist
= tree_cons (NULL_TREE
, src
, arglist
);
10460 arglist
= tree_cons (NULL_TREE
, dest
, arglist
);
10461 return build_function_call_expr (fn
, arglist
);
10466 arglist
= build_tree_list (NULL_TREE
, len
);
10467 arglist
= tree_cons (NULL_TREE
, src
, arglist
);
10468 arglist
= tree_cons (NULL_TREE
, dest
, arglist
);
10470 /* If __builtin_strncat_chk is used, assume strncat is available. */
10471 fn
= built_in_decls
[BUILT_IN_STRNCAT
];
10475 return build_function_call_expr (fn
, arglist
);
10478 /* Fold a call to __{,v}sprintf_chk with argument list ARGLIST. Return 0 if
10479 a normal call should be emitted rather than expanding the function
10480 inline. FCODE is either BUILT_IN_SPRINTF_CHK or BUILT_IN_VSPRINTF_CHK. */
10483 fold_builtin_sprintf_chk (tree arglist
, enum built_in_function fcode
)
10485 tree dest
, size
, len
, fn
, fmt
, flag
;
10486 const char *fmt_str
;
10488 /* Verify the required arguments in the original call. */
10491 dest
= TREE_VALUE (arglist
);
10492 if (! POINTER_TYPE_P (TREE_TYPE (dest
)))
10494 arglist
= TREE_CHAIN (arglist
);
10497 flag
= TREE_VALUE (arglist
);
10498 if (TREE_CODE (TREE_TYPE (flag
)) != INTEGER_TYPE
)
10500 arglist
= TREE_CHAIN (arglist
);
10503 size
= TREE_VALUE (arglist
);
10504 if (TREE_CODE (TREE_TYPE (size
)) != INTEGER_TYPE
)
10506 arglist
= TREE_CHAIN (arglist
);
10509 fmt
= TREE_VALUE (arglist
);
10510 if (! POINTER_TYPE_P (TREE_TYPE (fmt
)))
10512 arglist
= TREE_CHAIN (arglist
);
10514 if (! host_integerp (size
, 1))
10519 /* Check whether the format is a literal string constant. */
10520 fmt_str
= c_getstr (fmt
);
10521 if (fmt_str
!= NULL
)
10523 /* If the format doesn't contain % args or %%, we know the size. */
10524 if (strchr (fmt_str
, '%') == 0)
10526 if (fcode
!= BUILT_IN_SPRINTF_CHK
|| arglist
== NULL_TREE
)
10527 len
= build_int_cstu (size_type_node
, strlen (fmt_str
));
10529 /* If the format is "%s" and first ... argument is a string literal,
10530 we know the size too. */
10531 else if (fcode
== BUILT_IN_SPRINTF_CHK
&& strcmp (fmt_str
, "%s") == 0)
10535 if (arglist
&& !TREE_CHAIN (arglist
))
10537 arg
= TREE_VALUE (arglist
);
10538 if (POINTER_TYPE_P (TREE_TYPE (arg
)))
10540 len
= c_strlen (arg
, 1);
10541 if (! len
|| ! host_integerp (len
, 1))
10548 if (! integer_all_onesp (size
))
10550 if (! len
|| ! tree_int_cst_lt (len
, size
))
10554 /* Only convert __{,v}sprintf_chk to {,v}sprintf if flag is 0
10555 or if format doesn't contain % chars or is "%s". */
10556 if (! integer_zerop (flag
))
10558 if (fmt_str
== NULL
)
10560 if (strchr (fmt_str
, '%') != NULL
&& strcmp (fmt_str
, "%s"))
10564 arglist
= tree_cons (NULL_TREE
, fmt
, arglist
);
10565 arglist
= tree_cons (NULL_TREE
, dest
, arglist
);
10567 /* If __builtin_{,v}sprintf_chk is used, assume {,v}sprintf is available. */
10568 fn
= built_in_decls
[fcode
== BUILT_IN_VSPRINTF_CHK
10569 ? BUILT_IN_VSPRINTF
: BUILT_IN_SPRINTF
];
10573 return build_function_call_expr (fn
, arglist
);
10576 /* Fold a call to {,v}snprintf with argument list ARGLIST. Return 0 if
10577 a normal call should be emitted rather than expanding the function
10578 inline. FCODE is either BUILT_IN_SNPRINTF_CHK or
10579 BUILT_IN_VSNPRINTF_CHK. If MAXLEN is not NULL, it is maximum length
10580 passed as second argument. */
10583 fold_builtin_snprintf_chk (tree arglist
, tree maxlen
,
10584 enum built_in_function fcode
)
10586 tree dest
, size
, len
, fn
, fmt
, flag
;
10587 const char *fmt_str
;
10589 /* Verify the required arguments in the original call. */
10592 dest
= TREE_VALUE (arglist
);
10593 if (! POINTER_TYPE_P (TREE_TYPE (dest
)))
10595 arglist
= TREE_CHAIN (arglist
);
10598 len
= TREE_VALUE (arglist
);
10599 if (TREE_CODE (TREE_TYPE (len
)) != INTEGER_TYPE
)
10601 arglist
= TREE_CHAIN (arglist
);
10604 flag
= TREE_VALUE (arglist
);
10605 if (TREE_CODE (TREE_TYPE (len
)) != INTEGER_TYPE
)
10607 arglist
= TREE_CHAIN (arglist
);
10610 size
= TREE_VALUE (arglist
);
10611 if (TREE_CODE (TREE_TYPE (size
)) != INTEGER_TYPE
)
10613 arglist
= TREE_CHAIN (arglist
);
10616 fmt
= TREE_VALUE (arglist
);
10617 if (! POINTER_TYPE_P (TREE_TYPE (fmt
)))
10619 arglist
= TREE_CHAIN (arglist
);
10621 if (! host_integerp (size
, 1))
10624 if (! integer_all_onesp (size
))
10626 if (! host_integerp (len
, 1))
10628 /* If LEN is not constant, try MAXLEN too.
10629 For MAXLEN only allow optimizing into non-_ocs function
10630 if SIZE is >= MAXLEN, never convert to __ocs_fail (). */
10631 if (maxlen
== NULL_TREE
|| ! host_integerp (maxlen
, 1))
10637 if (tree_int_cst_lt (size
, maxlen
))
10641 /* Only convert __{,v}snprintf_chk to {,v}snprintf if flag is 0
10642 or if format doesn't contain % chars or is "%s". */
10643 if (! integer_zerop (flag
))
10645 fmt_str
= c_getstr (fmt
);
10646 if (fmt_str
== NULL
)
10648 if (strchr (fmt_str
, '%') != NULL
&& strcmp (fmt_str
, "%s"))
10652 arglist
= tree_cons (NULL_TREE
, fmt
, arglist
);
10653 arglist
= tree_cons (NULL_TREE
, len
, arglist
);
10654 arglist
= tree_cons (NULL_TREE
, dest
, arglist
);
10656 /* If __builtin_{,v}snprintf_chk is used, assume {,v}snprintf is
10658 fn
= built_in_decls
[fcode
== BUILT_IN_VSNPRINTF_CHK
10659 ? BUILT_IN_VSNPRINTF
: BUILT_IN_SNPRINTF
];
10663 return build_function_call_expr (fn
, arglist
);
10666 /* Fold a call to the {,v}printf{,_unlocked} and __{,v}printf_chk builtins.
10668 Return 0 if no simplification was possible, otherwise return the
10669 simplified form of the call as a tree. FCODE is the BUILT_IN_*
10670 code of the function to be simplified. */
10673 fold_builtin_printf (tree fndecl
, tree arglist
, bool ignore
,
10674 enum built_in_function fcode
)
10676 tree fmt
, fn
= NULL_TREE
, fn_putchar
, fn_puts
, arg
, call
;
10677 const char *fmt_str
= NULL
;
10679 /* If the return value is used, don't do the transformation. */
10683 /* Verify the required arguments in the original call. */
10684 if (fcode
== BUILT_IN_PRINTF_CHK
|| fcode
== BUILT_IN_VPRINTF_CHK
)
10690 flag
= TREE_VALUE (arglist
);
10691 if (TREE_CODE (TREE_TYPE (flag
)) != INTEGER_TYPE
10692 || TREE_SIDE_EFFECTS (flag
))
10694 arglist
= TREE_CHAIN (arglist
);
10699 fmt
= TREE_VALUE (arglist
);
10700 if (! POINTER_TYPE_P (TREE_TYPE (fmt
)))
10702 arglist
= TREE_CHAIN (arglist
);
10704 /* Check whether the format is a literal string constant. */
10705 fmt_str
= c_getstr (fmt
);
10706 if (fmt_str
== NULL
)
10709 if (fcode
== BUILT_IN_PRINTF_UNLOCKED
)
10711 fn_putchar
= implicit_built_in_decls
[BUILT_IN_PUTCHAR_UNLOCKED
];
10712 fn_puts
= implicit_built_in_decls
[BUILT_IN_PUTS_UNLOCKED
];
10716 fn_putchar
= implicit_built_in_decls
[BUILT_IN_PUTCHAR
];
10717 fn_puts
= implicit_built_in_decls
[BUILT_IN_PUTS
];
10720 if (strcmp (fmt_str
, "%s") == 0 || strchr (fmt_str
, '%') == NULL
)
10724 if (strcmp (fmt_str
, "%s") == 0)
10726 if (fcode
== BUILT_IN_VPRINTF
|| fcode
== BUILT_IN_VPRINTF_CHK
)
10730 || ! POINTER_TYPE_P (TREE_TYPE (TREE_VALUE (arglist
)))
10731 || TREE_CHAIN (arglist
))
10734 str
= c_getstr (TREE_VALUE (arglist
));
10740 /* The format specifier doesn't contain any '%' characters. */
10741 if (fcode
!= BUILT_IN_VPRINTF
&& fcode
!= BUILT_IN_VPRINTF_CHK
10747 /* If the string was "", printf does nothing. */
10748 if (str
[0] == '\0')
10749 return build_int_cst (TREE_TYPE (TREE_TYPE (fndecl
)), 0);
10751 /* If the string has length of 1, call putchar. */
10752 if (str
[1] == '\0')
10754 /* Given printf("c"), (where c is any one character,)
10755 convert "c"[0] to an int and pass that to the replacement
10757 arg
= build_int_cst (NULL_TREE
, str
[0]);
10758 arglist
= build_tree_list (NULL_TREE
, arg
);
10763 /* If the string was "string\n", call puts("string"). */
10764 size_t len
= strlen (str
);
10765 if (str
[len
- 1] == '\n')
10767 /* Create a NUL-terminated string that's one char shorter
10768 than the original, stripping off the trailing '\n'. */
10769 char *newstr
= alloca (len
);
10770 memcpy (newstr
, str
, len
- 1);
10771 newstr
[len
- 1] = 0;
10773 arg
= build_string_literal (len
, newstr
);
10774 arglist
= build_tree_list (NULL_TREE
, arg
);
10778 /* We'd like to arrange to call fputs(string,stdout) here,
10779 but we need stdout and don't have a way to get it yet. */
10784 /* The other optimizations can be done only on the non-va_list variants. */
10785 else if (fcode
== BUILT_IN_VPRINTF
|| fcode
== BUILT_IN_VPRINTF_CHK
)
10788 /* If the format specifier was "%s\n", call __builtin_puts(arg). */
10789 else if (strcmp (fmt_str
, "%s\n") == 0)
10792 || ! POINTER_TYPE_P (TREE_TYPE (TREE_VALUE (arglist
)))
10793 || TREE_CHAIN (arglist
))
10798 /* If the format specifier was "%c", call __builtin_putchar(arg). */
10799 else if (strcmp (fmt_str
, "%c") == 0)
10802 || TREE_CODE (TREE_TYPE (TREE_VALUE (arglist
))) != INTEGER_TYPE
10803 || TREE_CHAIN (arglist
))
10811 call
= build_function_call_expr (fn
, arglist
);
10812 return fold_convert (TREE_TYPE (TREE_TYPE (fndecl
)), call
);
10815 /* Fold a call to the {,v}fprintf{,_unlocked} and __{,v}printf_chk builtins.
10817 Return 0 if no simplification was possible, otherwise return the
10818 simplified form of the call as a tree. FCODE is the BUILT_IN_*
10819 code of the function to be simplified. */
10822 fold_builtin_fprintf (tree fndecl
, tree arglist
, bool ignore
,
10823 enum built_in_function fcode
)
10825 tree fp
, fmt
, fn
= NULL_TREE
, fn_fputc
, fn_fputs
, arg
, call
;
10826 const char *fmt_str
= NULL
;
10828 /* If the return value is used, don't do the transformation. */
10832 /* Verify the required arguments in the original call. */
10835 fp
= TREE_VALUE (arglist
);
10836 if (! POINTER_TYPE_P (TREE_TYPE (fp
)))
10838 arglist
= TREE_CHAIN (arglist
);
10840 if (fcode
== BUILT_IN_FPRINTF_CHK
|| fcode
== BUILT_IN_VFPRINTF_CHK
)
10846 flag
= TREE_VALUE (arglist
);
10847 if (TREE_CODE (TREE_TYPE (flag
)) != INTEGER_TYPE
10848 || TREE_SIDE_EFFECTS (flag
))
10850 arglist
= TREE_CHAIN (arglist
);
10855 fmt
= TREE_VALUE (arglist
);
10856 if (! POINTER_TYPE_P (TREE_TYPE (fmt
)))
10858 arglist
= TREE_CHAIN (arglist
);
10860 /* Check whether the format is a literal string constant. */
10861 fmt_str
= c_getstr (fmt
);
10862 if (fmt_str
== NULL
)
10865 if (fcode
== BUILT_IN_FPRINTF_UNLOCKED
)
10867 fn_fputc
= implicit_built_in_decls
[BUILT_IN_FPUTC_UNLOCKED
];
10868 fn_fputs
= implicit_built_in_decls
[BUILT_IN_FPUTS_UNLOCKED
];
10872 fn_fputc
= implicit_built_in_decls
[BUILT_IN_FPUTC
];
10873 fn_fputs
= implicit_built_in_decls
[BUILT_IN_FPUTS
];
10876 /* If the format doesn't contain % args or %%, use strcpy. */
10877 if (strchr (fmt_str
, '%') == NULL
)
10879 if (fcode
!= BUILT_IN_VFPRINTF
&& fcode
!= BUILT_IN_VFPRINTF_CHK
10883 /* If the format specifier was "", fprintf does nothing. */
10884 if (fmt_str
[0] == '\0')
10886 /* If FP has side-effects, just wait until gimplification is
10888 if (TREE_SIDE_EFFECTS (fp
))
10891 return build_int_cst (TREE_TYPE (TREE_TYPE (fndecl
)), 0);
10894 /* When "string" doesn't contain %, replace all cases of
10895 fprintf (fp, string) with fputs (string, fp). The fputs
10896 builtin will take care of special cases like length == 1. */
10897 arglist
= build_tree_list (NULL_TREE
, fp
);
10898 arglist
= tree_cons (NULL_TREE
, fmt
, arglist
);
10902 /* The other optimizations can be done only on the non-va_list variants. */
10903 else if (fcode
== BUILT_IN_VFPRINTF
|| fcode
== BUILT_IN_VFPRINTF_CHK
)
10906 /* If the format specifier was "%s", call __builtin_fputs (arg, fp). */
10907 else if (strcmp (fmt_str
, "%s") == 0)
10910 || ! POINTER_TYPE_P (TREE_TYPE (TREE_VALUE (arglist
)))
10911 || TREE_CHAIN (arglist
))
10913 arg
= TREE_VALUE (arglist
);
10914 arglist
= build_tree_list (NULL_TREE
, fp
);
10915 arglist
= tree_cons (NULL_TREE
, arg
, arglist
);
10919 /* If the format specifier was "%c", call __builtin_fputc (arg, fp). */
10920 else if (strcmp (fmt_str
, "%c") == 0)
10923 || TREE_CODE (TREE_TYPE (TREE_VALUE (arglist
))) != INTEGER_TYPE
10924 || TREE_CHAIN (arglist
))
10926 arg
= TREE_VALUE (arglist
);
10927 arglist
= build_tree_list (NULL_TREE
, fp
);
10928 arglist
= tree_cons (NULL_TREE
, arg
, arglist
);
10935 call
= build_function_call_expr (fn
, arglist
);
10936 return fold_convert (TREE_TYPE (TREE_TYPE (fndecl
)), call
);