1 /* Default target hook functions.
2 Copyright (C) 2003-2015 Free Software Foundation, Inc.
4 This file is part of GCC.
6 GCC is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 3, or (at your option) any later
11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
20 /* The migration of target macros to target hooks works as follows:
22 1. Create a target hook that uses the existing target macros to
23 implement the same functionality.
25 2. Convert all the MI files to use the hook instead of the macro.
27 3. Repeat for a majority of the remaining target macros. This will
30 4. Tell target maintainers to start migrating.
32 5. Eventually convert the backends to override the hook instead of
33 defining the macros. This will take some time too.
35 6. TBD when, poison the macros. Unmigrated targets will break at
38 Note that we expect steps 1-3 to be done by the people that
39 understand what the MI does with each macro, and step 5 to be done
40 by the target maintainers for their respective targets.
42 Note that steps 1 and 2 don't have to be done together, but no
43 target can override the new hook until step 2 is complete for it.
45 Once the macros are poisoned, we will revert to the old migration
46 rules - migrate the macro, callers, and targets all at once. This
47 comment can thus be removed at that point. */
51 #include "coretypes.h"
56 #include "fold-const.h"
57 #include "stor-layout.h"
61 #include "insn-config.h"
70 #include "diagnostic-core.h"
75 #include "insn-codes.h"
80 #include "tree-ssa-alias.h"
81 #include "gimple-expr.h"
83 #include "stringpool.h"
84 #include "tree-ssanames.h"
88 default_legitimate_address_p (machine_mode mode ATTRIBUTE_UNUSED
,
89 rtx addr ATTRIBUTE_UNUSED
,
90 bool strict ATTRIBUTE_UNUSED
)
92 #ifdef GO_IF_LEGITIMATE_ADDRESS
93 /* Defer to the old implementation using a goto. */
95 return strict_memory_address_p (mode
, addr
);
97 return memory_address_p (mode
, addr
);
104 default_external_libcall (rtx fun ATTRIBUTE_UNUSED
)
106 #ifdef ASM_OUTPUT_EXTERNAL_LIBCALL
107 ASM_OUTPUT_EXTERNAL_LIBCALL (asm_out_file
, fun
);
112 default_unspec_may_trap_p (const_rtx x
, unsigned flags
)
116 /* Any floating arithmetic may trap. */
117 if ((SCALAR_FLOAT_MODE_P (GET_MODE (x
)) && flag_trapping_math
))
120 for (i
= 0; i
< XVECLEN (x
, 0); ++i
)
122 if (may_trap_p_1 (XVECEXP (x
, 0, i
), flags
))
130 default_promote_function_mode (const_tree type ATTRIBUTE_UNUSED
,
132 int *punsignedp ATTRIBUTE_UNUSED
,
133 const_tree funtype ATTRIBUTE_UNUSED
,
134 int for_return ATTRIBUTE_UNUSED
)
136 if (type
!= NULL_TREE
&& for_return
== 2)
137 return promote_mode (type
, mode
, punsignedp
);
142 default_promote_function_mode_always_promote (const_tree type
,
145 const_tree funtype ATTRIBUTE_UNUSED
,
146 int for_return ATTRIBUTE_UNUSED
)
148 return promote_mode (type
, mode
, punsignedp
);
152 default_cc_modes_compatible (machine_mode m1
, machine_mode m2
)
160 default_return_in_memory (const_tree type
,
161 const_tree fntype ATTRIBUTE_UNUSED
)
163 return (TYPE_MODE (type
) == BLKmode
);
167 default_legitimize_address (rtx x
, rtx orig_x ATTRIBUTE_UNUSED
,
168 machine_mode mode ATTRIBUTE_UNUSED
)
174 default_legitimize_address_displacement (rtx
*disp ATTRIBUTE_UNUSED
,
175 rtx
*offset ATTRIBUTE_UNUSED
,
176 machine_mode mode ATTRIBUTE_UNUSED
)
182 default_expand_builtin_saveregs (void)
184 error ("__builtin_saveregs not supported by this target");
189 default_setup_incoming_varargs (cumulative_args_t ca ATTRIBUTE_UNUSED
,
190 machine_mode mode ATTRIBUTE_UNUSED
,
191 tree type ATTRIBUTE_UNUSED
,
192 int *pretend_arg_size ATTRIBUTE_UNUSED
,
193 int second_time ATTRIBUTE_UNUSED
)
197 /* The default implementation of TARGET_BUILTIN_SETJMP_FRAME_VALUE. */
200 default_builtin_setjmp_frame_value (void)
202 return virtual_stack_vars_rtx
;
205 /* Generic hook that takes a CUMULATIVE_ARGS pointer and returns false. */
208 hook_bool_CUMULATIVE_ARGS_false (cumulative_args_t ca ATTRIBUTE_UNUSED
)
214 default_pretend_outgoing_varargs_named (cumulative_args_t ca ATTRIBUTE_UNUSED
)
216 return (targetm
.calls
.setup_incoming_varargs
217 != default_setup_incoming_varargs
);
221 default_eh_return_filter_mode (void)
223 return targetm
.unwind_word_mode ();
227 default_libgcc_cmp_return_mode (void)
233 default_libgcc_shift_count_mode (void)
239 default_unwind_word_mode (void)
244 /* The default implementation of TARGET_SHIFT_TRUNCATION_MASK. */
246 unsigned HOST_WIDE_INT
247 default_shift_truncation_mask (machine_mode mode
)
249 return SHIFT_COUNT_TRUNCATED
? GET_MODE_BITSIZE (mode
) - 1 : 0;
252 /* The default implementation of TARGET_MIN_DIVISIONS_FOR_RECIP_MUL. */
255 default_min_divisions_for_recip_mul (machine_mode mode ATTRIBUTE_UNUSED
)
257 return have_insn_for (DIV
, mode
) ? 3 : 2;
260 /* The default implementation of TARGET_MODE_REP_EXTENDED. */
263 default_mode_rep_extended (machine_mode mode ATTRIBUTE_UNUSED
,
264 machine_mode mode_rep ATTRIBUTE_UNUSED
)
269 /* Generic hook that takes a CUMULATIVE_ARGS pointer and returns true. */
272 hook_bool_CUMULATIVE_ARGS_true (cumulative_args_t a ATTRIBUTE_UNUSED
)
277 /* Return machine mode for non-standard suffix
278 or VOIDmode if non-standard suffixes are unsupported. */
280 default_mode_for_suffix (char suffix ATTRIBUTE_UNUSED
)
285 /* The generic C++ ABI specifies this is a 64-bit value. */
287 default_cxx_guard_type (void)
289 return long_long_integer_type_node
;
292 /* Returns the size of the cookie to use when allocating an array
293 whose elements have the indicated TYPE. Assumes that it is already
294 known that a cookie is needed. */
297 default_cxx_get_cookie_size (tree type
)
301 /* We need to allocate an additional max (sizeof (size_t), alignof
302 (true_type)) bytes. */
306 sizetype_size
= size_in_bytes (sizetype
);
307 type_align
= size_int (TYPE_ALIGN_UNIT (type
));
308 if (tree_int_cst_lt (type_align
, sizetype_size
))
309 cookie_size
= sizetype_size
;
311 cookie_size
= type_align
;
316 /* Return true if a parameter must be passed by reference. This version
317 of the TARGET_PASS_BY_REFERENCE hook uses just MUST_PASS_IN_STACK. */
320 hook_pass_by_reference_must_pass_in_stack (cumulative_args_t c ATTRIBUTE_UNUSED
,
321 machine_mode mode ATTRIBUTE_UNUSED
, const_tree type ATTRIBUTE_UNUSED
,
322 bool named_arg ATTRIBUTE_UNUSED
)
324 return targetm
.calls
.must_pass_in_stack (mode
, type
);
327 /* Return true if a parameter follows callee copies conventions. This
328 version of the hook is true for all named arguments. */
331 hook_callee_copies_named (cumulative_args_t ca ATTRIBUTE_UNUSED
,
332 machine_mode mode ATTRIBUTE_UNUSED
,
333 const_tree type ATTRIBUTE_UNUSED
, bool named
)
338 /* Emit to STREAM the assembler syntax for insn operand X. */
341 default_print_operand (FILE *stream ATTRIBUTE_UNUSED
, rtx x ATTRIBUTE_UNUSED
,
342 int code ATTRIBUTE_UNUSED
)
345 PRINT_OPERAND (stream
, x
, code
);
351 /* Emit to STREAM the assembler syntax for an insn operand whose memory
355 default_print_operand_address (FILE *stream ATTRIBUTE_UNUSED
,
356 rtx x ATTRIBUTE_UNUSED
)
358 #ifdef PRINT_OPERAND_ADDRESS
359 PRINT_OPERAND_ADDRESS (stream
, x
);
365 /* Return true if CODE is a valid punctuation character for the
366 `print_operand' hook. */
369 default_print_operand_punct_valid_p (unsigned char code ATTRIBUTE_UNUSED
)
371 #ifdef PRINT_OPERAND_PUNCT_VALID_P
372 return PRINT_OPERAND_PUNCT_VALID_P (code
);
378 /* The default implementation of TARGET_MANGLE_ASSEMBLER_NAME. */
380 default_mangle_assembler_name (const char *name ATTRIBUTE_UNUSED
)
382 const char *skipped
= name
+ (*name
== '*' ? 1 : 0);
383 const char *stripped
= targetm
.strip_name_encoding (skipped
);
384 if (*name
!= '*' && user_label_prefix
[0])
385 stripped
= ACONCAT ((user_label_prefix
, stripped
, NULL
));
386 return get_identifier (stripped
);
389 /* True if MODE is valid for the target. By "valid", we mean able to
390 be manipulated in non-trivial ways. In particular, this means all
391 the arithmetic is supported.
393 By default we guess this means that any C type is supported. If
394 we can't map the mode back to a type that would be available in C,
395 then reject it. Special case, here, is the double-word arithmetic
396 supported by optabs.c. */
399 default_scalar_mode_supported_p (machine_mode mode
)
401 int precision
= GET_MODE_PRECISION (mode
);
403 switch (GET_MODE_CLASS (mode
))
405 case MODE_PARTIAL_INT
:
407 if (precision
== CHAR_TYPE_SIZE
)
409 if (precision
== SHORT_TYPE_SIZE
)
411 if (precision
== INT_TYPE_SIZE
)
413 if (precision
== LONG_TYPE_SIZE
)
415 if (precision
== LONG_LONG_TYPE_SIZE
)
417 if (precision
== 2 * BITS_PER_WORD
)
422 if (precision
== FLOAT_TYPE_SIZE
)
424 if (precision
== DOUBLE_TYPE_SIZE
)
426 if (precision
== LONG_DOUBLE_TYPE_SIZE
)
430 case MODE_DECIMAL_FLOAT
:
442 /* Return true if libgcc supports floating-point mode MODE (known to
443 be supported as a scalar mode). */
446 default_libgcc_floating_mode_supported_p (machine_mode mode
)
469 /* Make some target macros useable by target-independent code. */
471 targhook_words_big_endian (void)
473 return !!WORDS_BIG_ENDIAN
;
477 targhook_float_words_big_endian (void)
479 return !!FLOAT_WORDS_BIG_ENDIAN
;
482 /* True if the target supports floating-point exceptions and rounding
486 default_float_exceptions_rounding_supported_p (void)
495 /* True if the target supports decimal floating point. */
498 default_decimal_float_supported_p (void)
500 return ENABLE_DECIMAL_FLOAT
;
503 /* True if the target supports fixed-point arithmetic. */
506 default_fixed_point_supported_p (void)
508 return ENABLE_FIXED_POINT
;
511 /* True if the target supports GNU indirect functions. */
514 default_has_ifunc_p (void)
516 return HAVE_GNU_INDIRECT_FUNCTION
;
519 /* NULL if INSN insn is valid within a low-overhead loop, otherwise returns
522 This function checks whether a given INSN is valid within a low-overhead
523 loop. If INSN is invalid it returns the reason for that, otherwise it
524 returns NULL. A called function may clobber any special registers required
525 for low-overhead looping. Additionally, some targets (eg, PPC) use the count
526 register for branch on table instructions. We reject the doloop pattern in
530 default_invalid_within_doloop (const rtx_insn
*insn
)
533 return "Function call in loop.";
535 if (tablejump_p (insn
, NULL
, NULL
) || computed_jump_p (insn
))
536 return "Computed branch in the loop.";
541 /* Mapping of builtin functions to vectorized variants. */
544 default_builtin_vectorized_function (tree fndecl ATTRIBUTE_UNUSED
,
545 tree type_out ATTRIBUTE_UNUSED
,
546 tree type_in ATTRIBUTE_UNUSED
)
551 /* Vectorized conversion. */
554 default_builtin_vectorized_conversion (unsigned int code ATTRIBUTE_UNUSED
,
555 tree dest_type ATTRIBUTE_UNUSED
,
556 tree src_type ATTRIBUTE_UNUSED
)
561 /* Default vectorizer cost model values. */
564 default_builtin_vectorization_cost (enum vect_cost_for_stmt type_of_cost
,
566 int misalign ATTRIBUTE_UNUSED
)
570 switch (type_of_cost
)
580 case cond_branch_not_taken
:
582 case vec_promote_demote
:
586 case unaligned_store
:
589 case cond_branch_taken
:
593 elements
= TYPE_VECTOR_SUBPARTS (vectype
);
594 return elements
/ 2 + 1;
604 default_builtin_reciprocal (unsigned int fn ATTRIBUTE_UNUSED
,
605 bool md_fn ATTRIBUTE_UNUSED
,
606 bool sqrt ATTRIBUTE_UNUSED
)
612 hook_bool_CUMULATIVE_ARGS_mode_tree_bool_false (
613 cumulative_args_t ca ATTRIBUTE_UNUSED
,
614 machine_mode mode ATTRIBUTE_UNUSED
,
615 const_tree type ATTRIBUTE_UNUSED
, bool named ATTRIBUTE_UNUSED
)
621 hook_bool_CUMULATIVE_ARGS_mode_tree_bool_true (
622 cumulative_args_t ca ATTRIBUTE_UNUSED
,
623 machine_mode mode ATTRIBUTE_UNUSED
,
624 const_tree type ATTRIBUTE_UNUSED
, bool named ATTRIBUTE_UNUSED
)
630 hook_int_CUMULATIVE_ARGS_mode_tree_bool_0 (
631 cumulative_args_t ca ATTRIBUTE_UNUSED
,
632 machine_mode mode ATTRIBUTE_UNUSED
,
633 tree type ATTRIBUTE_UNUSED
, bool named ATTRIBUTE_UNUSED
)
639 default_function_arg_advance (cumulative_args_t ca ATTRIBUTE_UNUSED
,
640 machine_mode mode ATTRIBUTE_UNUSED
,
641 const_tree type ATTRIBUTE_UNUSED
,
642 bool named ATTRIBUTE_UNUSED
)
648 default_function_arg (cumulative_args_t ca ATTRIBUTE_UNUSED
,
649 machine_mode mode ATTRIBUTE_UNUSED
,
650 const_tree type ATTRIBUTE_UNUSED
,
651 bool named ATTRIBUTE_UNUSED
)
657 default_function_incoming_arg (cumulative_args_t ca ATTRIBUTE_UNUSED
,
658 machine_mode mode ATTRIBUTE_UNUSED
,
659 const_tree type ATTRIBUTE_UNUSED
,
660 bool named ATTRIBUTE_UNUSED
)
666 default_function_arg_boundary (machine_mode mode ATTRIBUTE_UNUSED
,
667 const_tree type ATTRIBUTE_UNUSED
)
669 return PARM_BOUNDARY
;
673 default_function_arg_round_boundary (machine_mode mode ATTRIBUTE_UNUSED
,
674 const_tree type ATTRIBUTE_UNUSED
)
676 return PARM_BOUNDARY
;
680 hook_void_bitmap (bitmap regs ATTRIBUTE_UNUSED
)
685 hook_invalid_arg_for_unprototyped_fn (
686 const_tree typelist ATTRIBUTE_UNUSED
,
687 const_tree funcdecl ATTRIBUTE_UNUSED
,
688 const_tree val ATTRIBUTE_UNUSED
)
693 /* Initialize the stack protection decls. */
695 /* Stack protection related decls living in libgcc. */
696 static GTY(()) tree stack_chk_guard_decl
;
699 default_stack_protect_guard (void)
701 tree t
= stack_chk_guard_decl
;
707 t
= build_decl (UNKNOWN_LOCATION
,
708 VAR_DECL
, get_identifier ("__stack_chk_guard"),
712 DECL_EXTERNAL (t
) = 1;
714 TREE_THIS_VOLATILE (t
) = 1;
715 DECL_ARTIFICIAL (t
) = 1;
716 DECL_IGNORED_P (t
) = 1;
718 /* Do not share RTL as the declaration is visible outside of
721 RTX_FLAG (x
, used
) = 1;
723 stack_chk_guard_decl
= t
;
729 static GTY(()) tree stack_chk_fail_decl
;
732 default_external_stack_protect_fail (void)
734 tree t
= stack_chk_fail_decl
;
738 t
= build_function_type_list (void_type_node
, NULL_TREE
);
739 t
= build_decl (UNKNOWN_LOCATION
,
740 FUNCTION_DECL
, get_identifier ("__stack_chk_fail"), t
);
743 DECL_EXTERNAL (t
) = 1;
745 TREE_THIS_VOLATILE (t
) = 1;
746 TREE_NOTHROW (t
) = 1;
747 DECL_ARTIFICIAL (t
) = 1;
748 DECL_IGNORED_P (t
) = 1;
749 DECL_VISIBILITY (t
) = VISIBILITY_DEFAULT
;
750 DECL_VISIBILITY_SPECIFIED (t
) = 1;
752 stack_chk_fail_decl
= t
;
755 return build_call_expr (t
, 0);
759 default_hidden_stack_protect_fail (void)
761 #ifndef HAVE_GAS_HIDDEN
762 return default_external_stack_protect_fail ();
764 tree t
= stack_chk_fail_decl
;
767 return default_external_stack_protect_fail ();
771 t
= build_function_type_list (void_type_node
, NULL_TREE
);
772 t
= build_decl (UNKNOWN_LOCATION
, FUNCTION_DECL
,
773 get_identifier ("__stack_chk_fail_local"), t
);
776 DECL_EXTERNAL (t
) = 1;
778 TREE_THIS_VOLATILE (t
) = 1;
779 TREE_NOTHROW (t
) = 1;
780 DECL_ARTIFICIAL (t
) = 1;
781 DECL_IGNORED_P (t
) = 1;
782 DECL_VISIBILITY_SPECIFIED (t
) = 1;
783 DECL_VISIBILITY (t
) = VISIBILITY_HIDDEN
;
785 stack_chk_fail_decl
= t
;
788 return build_call_expr (t
, 0);
793 hook_bool_const_rtx_commutative_p (const_rtx x
,
794 int outer_code ATTRIBUTE_UNUSED
)
796 return COMMUTATIVE_P (x
);
800 default_function_value (const_tree ret_type ATTRIBUTE_UNUSED
,
801 const_tree fn_decl_or_type
,
802 bool outgoing ATTRIBUTE_UNUSED
)
804 /* The old interface doesn't handle receiving the function type. */
806 && !DECL_P (fn_decl_or_type
))
807 fn_decl_or_type
= NULL
;
809 #ifdef FUNCTION_VALUE
810 return FUNCTION_VALUE (ret_type
, fn_decl_or_type
);
817 default_libcall_value (machine_mode mode ATTRIBUTE_UNUSED
,
818 const_rtx fun ATTRIBUTE_UNUSED
)
821 return LIBCALL_VALUE (mode
);
827 /* The default hook for TARGET_FUNCTION_VALUE_REGNO_P. */
830 default_function_value_regno_p (const unsigned int regno ATTRIBUTE_UNUSED
)
832 #ifdef FUNCTION_VALUE_REGNO_P
833 return FUNCTION_VALUE_REGNO_P (regno
);
840 default_internal_arg_pointer (void)
842 /* If the reg that the virtual arg pointer will be translated into is
843 not a fixed reg or is the stack pointer, make a copy of the virtual
844 arg pointer, and address parms via the copy. The frame pointer is
845 considered fixed even though it is not marked as such. */
846 if ((ARG_POINTER_REGNUM
== STACK_POINTER_REGNUM
847 || ! (fixed_regs
[ARG_POINTER_REGNUM
]
848 || ARG_POINTER_REGNUM
== FRAME_POINTER_REGNUM
)))
849 return copy_to_reg (virtual_incoming_args_rtx
);
851 return virtual_incoming_args_rtx
;
855 default_static_chain (const_tree
ARG_UNUSED (fndecl_or_type
), bool incoming_p
)
859 #ifdef STATIC_CHAIN_INCOMING_REGNUM
860 return gen_rtx_REG (Pmode
, STATIC_CHAIN_INCOMING_REGNUM
);
864 #ifdef STATIC_CHAIN_REGNUM
865 return gen_rtx_REG (Pmode
, STATIC_CHAIN_REGNUM
);
869 static bool issued_error
;
873 sorry ("nested functions not supported on this target");
876 /* It really doesn't matter what we return here, so long at it
877 doesn't cause the rest of the compiler to crash. */
878 return gen_rtx_MEM (Pmode
, stack_pointer_rtx
);
883 default_trampoline_init (rtx
ARG_UNUSED (m_tramp
), tree
ARG_UNUSED (t_func
),
884 rtx
ARG_UNUSED (r_chain
))
886 sorry ("nested function trampolines not supported on this target");
890 default_return_pops_args (tree fundecl ATTRIBUTE_UNUSED
,
891 tree funtype ATTRIBUTE_UNUSED
,
892 int size ATTRIBUTE_UNUSED
)
898 default_branch_target_register_class (void)
904 default_ira_change_pseudo_allocno_class (int regno ATTRIBUTE_UNUSED
,
917 default_register_priority (int hard_regno ATTRIBUTE_UNUSED
)
923 default_register_usage_leveling_p (void)
929 default_different_addr_displacement_p (void)
935 default_secondary_reload (bool in_p ATTRIBUTE_UNUSED
, rtx x ATTRIBUTE_UNUSED
,
936 reg_class_t reload_class_i ATTRIBUTE_UNUSED
,
937 machine_mode reload_mode ATTRIBUTE_UNUSED
,
938 secondary_reload_info
*sri
)
940 enum reg_class rclass
= NO_REGS
;
941 enum reg_class reload_class
= (enum reg_class
) reload_class_i
;
943 if (sri
->prev_sri
&& sri
->prev_sri
->t_icode
!= CODE_FOR_nothing
)
945 sri
->icode
= sri
->prev_sri
->t_icode
;
948 #ifdef SECONDARY_INPUT_RELOAD_CLASS
950 rclass
= SECONDARY_INPUT_RELOAD_CLASS (reload_class
, reload_mode
, x
);
952 #ifdef SECONDARY_OUTPUT_RELOAD_CLASS
954 rclass
= SECONDARY_OUTPUT_RELOAD_CLASS (reload_class
, reload_mode
, x
);
956 if (rclass
!= NO_REGS
)
959 = direct_optab_handler (in_p
? reload_in_optab
: reload_out_optab
,
962 if (icode
!= CODE_FOR_nothing
963 && !insn_operand_matches (icode
, in_p
, x
))
964 icode
= CODE_FOR_nothing
;
965 else if (icode
!= CODE_FOR_nothing
)
967 const char *insn_constraint
, *scratch_constraint
;
968 enum reg_class insn_class
, scratch_class
;
970 gcc_assert (insn_data
[(int) icode
].n_operands
== 3);
971 insn_constraint
= insn_data
[(int) icode
].operand
[!in_p
].constraint
;
972 if (!*insn_constraint
)
973 insn_class
= ALL_REGS
;
978 gcc_assert (*insn_constraint
== '=');
981 insn_class
= (reg_class_for_constraint
982 (lookup_constraint (insn_constraint
)));
983 gcc_assert (insn_class
!= NO_REGS
);
986 scratch_constraint
= insn_data
[(int) icode
].operand
[2].constraint
;
987 /* The scratch register's constraint must start with "=&",
988 except for an input reload, where only "=" is necessary,
989 and where it might be beneficial to re-use registers from
991 gcc_assert (scratch_constraint
[0] == '='
992 && (in_p
|| scratch_constraint
[1] == '&'));
993 scratch_constraint
++;
994 if (*scratch_constraint
== '&')
995 scratch_constraint
++;
996 scratch_class
= (reg_class_for_constraint
997 (lookup_constraint (scratch_constraint
)));
999 if (reg_class_subset_p (reload_class
, insn_class
))
1001 gcc_assert (scratch_class
== rclass
);
1005 rclass
= insn_class
;
1008 if (rclass
== NO_REGS
)
1011 sri
->t_icode
= icode
;
1016 /* By default, if flag_pic is true, then neither local nor global relocs
1017 should be placed in readonly memory. */
1020 default_reloc_rw_mask (void)
1022 return flag_pic
? 3 : 0;
1025 /* By default, do no modification. */
1026 tree
default_mangle_decl_assembler_name (tree decl ATTRIBUTE_UNUSED
,
1032 /* Default to natural alignment for vector types. */
1034 default_vector_alignment (const_tree type
)
1036 return tree_to_shwi (TYPE_SIZE (type
));
1040 default_builtin_vector_alignment_reachable (const_tree type
, bool is_packed
)
1045 /* Assuming that types whose size is > pointer-size are not guaranteed to be
1046 naturally aligned. */
1047 if (tree_int_cst_compare (TYPE_SIZE (type
), bitsize_int (POINTER_SIZE
)) > 0)
1050 /* Assuming that types whose size is <= pointer-size
1051 are naturally aligned. */
1055 /* By default, assume that a target supports any factor of misalignment
1056 memory access if it supports movmisalign patten.
1057 is_packed is true if the memory access is defined in a packed struct. */
1059 default_builtin_support_vector_misalignment (machine_mode mode
,
1067 if (optab_handler (movmisalign_optab
, mode
) != CODE_FOR_nothing
)
1072 /* By default, only attempt to parallelize bitwise operations, and
1073 possibly adds/subtracts using bit-twiddling. */
1076 default_preferred_simd_mode (machine_mode mode ATTRIBUTE_UNUSED
)
1081 /* By default only the size derived from the preferred vector mode
1085 default_autovectorize_vector_sizes (void)
1090 /* By defaults a vector of integers is used as a mask. */
1093 default_get_mask_mode (unsigned nunits
, unsigned vector_size
)
1095 unsigned elem_size
= vector_size
/ nunits
;
1096 machine_mode elem_mode
1097 = smallest_mode_for_size (elem_size
* BITS_PER_UNIT
, MODE_INT
);
1099 gcc_assert (elem_size
* nunits
== vector_size
);
1101 return mode_for_vector (elem_mode
, nunits
);
1104 /* By default, the cost model accumulates three separate costs (prologue,
1105 loop body, and epilogue) for a vectorized loop or block. So allocate an
1106 array of three unsigned ints, set it to zero, and return its address. */
1109 default_init_cost (struct loop
*loop_info ATTRIBUTE_UNUSED
)
1111 unsigned *cost
= XNEWVEC (unsigned, 3);
1112 cost
[vect_prologue
] = cost
[vect_body
] = cost
[vect_epilogue
] = 0;
1116 /* By default, the cost model looks up the cost of the given statement
1117 kind and mode, multiplies it by the occurrence count, accumulates
1118 it into the cost specified by WHERE, and returns the cost added. */
1121 default_add_stmt_cost (void *data
, int count
, enum vect_cost_for_stmt kind
,
1122 struct _stmt_vec_info
*stmt_info
, int misalign
,
1123 enum vect_cost_model_location where
)
1125 unsigned *cost
= (unsigned *) data
;
1126 unsigned retval
= 0;
1128 tree vectype
= stmt_info
? stmt_vectype (stmt_info
) : NULL_TREE
;
1129 int stmt_cost
= targetm
.vectorize
.builtin_vectorization_cost (kind
, vectype
,
1131 /* Statements in an inner loop relative to the loop being
1132 vectorized are weighted more heavily. The value here is
1133 arbitrary and could potentially be improved with analysis. */
1134 if (where
== vect_body
&& stmt_info
&& stmt_in_inner_loop_p (stmt_info
))
1135 count
*= 50; /* FIXME. */
1137 retval
= (unsigned) (count
* stmt_cost
);
1138 cost
[where
] += retval
;
1143 /* By default, the cost model just returns the accumulated costs. */
1146 default_finish_cost (void *data
, unsigned *prologue_cost
,
1147 unsigned *body_cost
, unsigned *epilogue_cost
)
1149 unsigned *cost
= (unsigned *) data
;
1150 *prologue_cost
= cost
[vect_prologue
];
1151 *body_cost
= cost
[vect_body
];
1152 *epilogue_cost
= cost
[vect_epilogue
];
1155 /* Free the cost data. */
1158 default_destroy_cost_data (void *data
)
1163 /* Determine whether or not a pointer mode is valid. Assume defaults
1164 of ptr_mode or Pmode - can be overridden. */
1166 default_valid_pointer_mode (machine_mode mode
)
1168 return (mode
== ptr_mode
|| mode
== Pmode
);
1171 /* Determine whether the memory reference specified by REF may alias
1172 the C libraries errno location. */
1174 default_ref_may_alias_errno (ao_ref
*ref
)
1176 tree base
= ao_ref_base (ref
);
1177 /* The default implementation assumes the errno location is
1178 a declaration of type int or is always accessed via a
1179 pointer to int. We assume that accesses to errno are
1180 not deliberately obfuscated (even in conforming ways). */
1181 if (TYPE_UNSIGNED (TREE_TYPE (base
))
1182 || TYPE_MODE (TREE_TYPE (base
)) != TYPE_MODE (integer_type_node
))
1184 /* The default implementation assumes an errno location
1185 declaration is never defined in the current compilation unit. */
1187 && !TREE_STATIC (base
))
1189 else if (TREE_CODE (base
) == MEM_REF
1190 && TREE_CODE (TREE_OPERAND (base
, 0)) == SSA_NAME
)
1192 struct ptr_info_def
*pi
= SSA_NAME_PTR_INFO (TREE_OPERAND (base
, 0));
1193 return !pi
|| pi
->pt
.anything
|| pi
->pt
.nonlocal
;
1198 /* Return the mode for a pointer to a given ADDRSPACE,
1199 defaulting to ptr_mode for all address spaces. */
1202 default_addr_space_pointer_mode (addr_space_t addrspace ATTRIBUTE_UNUSED
)
1207 /* Return the mode for an address in a given ADDRSPACE,
1208 defaulting to Pmode for all address spaces. */
1211 default_addr_space_address_mode (addr_space_t addrspace ATTRIBUTE_UNUSED
)
1216 /* Named address space version of valid_pointer_mode.
1217 To match the above, the same modes apply to all address spaces. */
1220 default_addr_space_valid_pointer_mode (machine_mode mode
,
1221 addr_space_t as ATTRIBUTE_UNUSED
)
1223 return targetm
.valid_pointer_mode (mode
);
1226 /* Some places still assume that all pointer or address modes are the
1227 standard Pmode and ptr_mode. These optimizations become invalid if
1228 the target actually supports multiple different modes. For now,
1229 we disable such optimizations on such targets, using this function. */
1232 target_default_pointer_address_modes_p (void)
1234 if (targetm
.addr_space
.address_mode
!= default_addr_space_address_mode
)
1236 if (targetm
.addr_space
.pointer_mode
!= default_addr_space_pointer_mode
)
1242 /* Named address space version of legitimate_address_p.
1243 By default, all address spaces have the same form. */
1246 default_addr_space_legitimate_address_p (machine_mode mode
, rtx mem
,
1248 addr_space_t as ATTRIBUTE_UNUSED
)
1250 return targetm
.legitimate_address_p (mode
, mem
, strict
);
1253 /* Named address space version of LEGITIMIZE_ADDRESS.
1254 By default, all address spaces have the same form. */
1257 default_addr_space_legitimize_address (rtx x
, rtx oldx
, machine_mode mode
,
1258 addr_space_t as ATTRIBUTE_UNUSED
)
1260 return targetm
.legitimize_address (x
, oldx
, mode
);
1263 /* The default hook for determining if one named address space is a subset of
1264 another and to return which address space to use as the common address
1268 default_addr_space_subset_p (addr_space_t subset
, addr_space_t superset
)
1270 return (subset
== superset
);
1273 /* The default hook for TARGET_ADDR_SPACE_CONVERT. This hook should never be
1274 called for targets with only a generic address space. */
1277 default_addr_space_convert (rtx op ATTRIBUTE_UNUSED
,
1278 tree from_type ATTRIBUTE_UNUSED
,
1279 tree to_type ATTRIBUTE_UNUSED
)
1285 default_hard_regno_scratch_ok (unsigned int regno ATTRIBUTE_UNUSED
)
1290 /* The default implementation of TARGET_MODE_DEPENDENT_ADDRESS_P. */
1293 default_mode_dependent_address_p (const_rtx addr ATTRIBUTE_UNUSED
,
1294 addr_space_t addrspace ATTRIBUTE_UNUSED
)
1300 default_target_option_valid_attribute_p (tree
ARG_UNUSED (fndecl
),
1301 tree
ARG_UNUSED (name
),
1302 tree
ARG_UNUSED (args
),
1303 int ARG_UNUSED (flags
))
1305 warning (OPT_Wattributes
,
1306 "target attribute is not supported on this machine");
1312 default_target_option_pragma_parse (tree
ARG_UNUSED (args
),
1313 tree
ARG_UNUSED (pop_target
))
1315 /* If args is NULL the caller is handle_pragma_pop_options (). In that case,
1316 emit no warning because "#pragma GCC pop_target" is valid on targets that
1317 do not have the "target" pragma. */
1319 warning (OPT_Wpragmas
,
1320 "#pragma GCC target is not supported for this machine");
1326 default_target_can_inline_p (tree caller
, tree callee
)
1329 tree callee_opts
= DECL_FUNCTION_SPECIFIC_TARGET (callee
);
1330 tree caller_opts
= DECL_FUNCTION_SPECIFIC_TARGET (caller
);
1332 /* If callee has no option attributes, then it is ok to inline */
1336 /* If caller has no option attributes, but callee does then it is not ok to
1338 else if (!caller_opts
)
1341 /* If both caller and callee have attributes, assume that if the
1342 pointer is different, the two functions have different target
1343 options since build_target_option_node uses a hash table for the
1346 ret
= (callee_opts
== caller_opts
);
1351 /* If the machine does not have a case insn that compares the bounds,
1352 this means extra overhead for dispatch tables, which raises the
1353 threshold for using them. */
1356 default_case_values_threshold (void)
1358 return (targetm
.have_casesi () ? 4 : 5);
1362 default_have_conditional_execution (void)
1364 return HAVE_conditional_execution
;
1367 /* By default we assume that c99 functions are present at the runtime,
1368 but sincos is not. */
1370 default_libc_has_function (enum function_class fn_class
)
1372 if (fn_class
== function_c94
1373 || fn_class
== function_c99_misc
1374 || fn_class
== function_c99_math_complex
)
1381 gnu_libc_has_function (enum function_class fn_class ATTRIBUTE_UNUSED
)
1387 no_c99_libc_has_function (enum function_class fn_class ATTRIBUTE_UNUSED
)
1393 default_builtin_tm_load_store (tree
ARG_UNUSED (type
))
1398 /* Compute cost of moving registers to/from memory. */
1401 default_memory_move_cost (machine_mode mode ATTRIBUTE_UNUSED
,
1402 reg_class_t rclass ATTRIBUTE_UNUSED
,
1403 bool in ATTRIBUTE_UNUSED
)
1405 #ifndef MEMORY_MOVE_COST
1406 return (4 + memory_move_secondary_cost (mode
, (enum reg_class
) rclass
, in
));
1408 return MEMORY_MOVE_COST (mode
, (enum reg_class
) rclass
, in
);
1412 /* Compute cost of moving data from a register of class FROM to one of
1416 default_register_move_cost (machine_mode mode ATTRIBUTE_UNUSED
,
1417 reg_class_t from ATTRIBUTE_UNUSED
,
1418 reg_class_t to ATTRIBUTE_UNUSED
)
1420 #ifndef REGISTER_MOVE_COST
1423 return REGISTER_MOVE_COST (mode
, (enum reg_class
) from
, (enum reg_class
) to
);
1427 /* For hooks which use the MOVE_RATIO macro, this gives the legacy default
1428 behaviour. SPEED_P is true if we are compiling for speed. */
1431 get_move_ratio (bool speed_p ATTRIBUTE_UNUSED
)
1433 unsigned int move_ratio
;
1435 move_ratio
= (unsigned int) MOVE_RATIO (speed_p
);
1437 #if defined (HAVE_movmemqi) || defined (HAVE_movmemhi) || defined (HAVE_movmemsi) || defined (HAVE_movmemdi) || defined (HAVE_movmemti)
1439 #else /* No movmem patterns, pick a default. */
1440 move_ratio
= ((speed_p
) ? 15 : 3);
1446 /* Return TRUE if the move_by_pieces/set_by_pieces infrastructure should be
1447 used; return FALSE if the movmem/setmem optab should be expanded, or
1448 a call to memcpy emitted. */
1451 default_use_by_pieces_infrastructure_p (unsigned HOST_WIDE_INT size
,
1452 unsigned int alignment
,
1453 enum by_pieces_operation op
,
1456 unsigned int max_size
= 0;
1457 unsigned int ratio
= 0;
1461 case CLEAR_BY_PIECES
:
1462 max_size
= STORE_MAX_PIECES
;
1463 ratio
= CLEAR_RATIO (speed_p
);
1465 case MOVE_BY_PIECES
:
1466 max_size
= MOVE_MAX_PIECES
;
1467 ratio
= get_move_ratio (speed_p
);
1470 max_size
= STORE_MAX_PIECES
;
1471 ratio
= SET_RATIO (speed_p
);
1473 case STORE_BY_PIECES
:
1474 max_size
= STORE_MAX_PIECES
;
1475 ratio
= get_move_ratio (speed_p
);
1479 return move_by_pieces_ninsns (size
, alignment
, max_size
+ 1) < ratio
;
1483 default_profile_before_prologue (void)
1485 #ifdef PROFILE_BEFORE_PROLOGUE
1492 /* The default implementation of TARGET_PREFERRED_RELOAD_CLASS. */
1495 default_preferred_reload_class (rtx x ATTRIBUTE_UNUSED
,
1498 #ifdef PREFERRED_RELOAD_CLASS
1499 return (reg_class_t
) PREFERRED_RELOAD_CLASS (x
, (enum reg_class
) rclass
);
1505 /* The default implementation of TARGET_OUTPUT_PREFERRED_RELOAD_CLASS. */
1508 default_preferred_output_reload_class (rtx x ATTRIBUTE_UNUSED
,
1514 /* The default implementation of TARGET_PREFERRED_RENAME_CLASS. */
1516 default_preferred_rename_class (reg_class_t rclass ATTRIBUTE_UNUSED
)
1521 /* The default implementation of TARGET_CLASS_LIKELY_SPILLED_P. */
1524 default_class_likely_spilled_p (reg_class_t rclass
)
1526 return (reg_class_size
[(int) rclass
] == 1);
1529 /* The default implementation of TARGET_CLASS_MAX_NREGS. */
1532 default_class_max_nregs (reg_class_t rclass ATTRIBUTE_UNUSED
,
1533 machine_mode mode ATTRIBUTE_UNUSED
)
1535 #ifdef CLASS_MAX_NREGS
1536 return (unsigned char) CLASS_MAX_NREGS ((enum reg_class
) rclass
, mode
);
1538 return ((GET_MODE_SIZE (mode
) + UNITS_PER_WORD
- 1) / UNITS_PER_WORD
);
1542 /* Determine the debugging unwind mechanism for the target. */
1544 enum unwind_info_type
1545 default_debug_unwind_info (void)
1547 /* If the target wants to force the use of dwarf2 unwind info, let it. */
1548 /* ??? Change all users to the hook, then poison this. */
1549 #ifdef DWARF2_FRAME_INFO
1550 if (DWARF2_FRAME_INFO
)
1554 /* Otherwise, only turn it on if dwarf2 debugging is enabled. */
1555 #ifdef DWARF2_DEBUGGING_INFO
1556 if (write_symbols
== DWARF2_DEBUG
|| write_symbols
== VMS_AND_DWARF2_DEBUG
)
1563 /* Determine the correct mode for a Dwarf frame register that represents
1567 default_dwarf_frame_reg_mode (int regno
)
1569 machine_mode save_mode
= reg_raw_mode
[regno
];
1571 if (HARD_REGNO_CALL_PART_CLOBBERED (regno
, save_mode
))
1572 save_mode
= choose_hard_reg_mode (regno
, 1, true);
1576 /* To be used by targets where reg_raw_mode doesn't return the right
1577 mode for registers used in apply_builtin_return and apply_builtin_arg. */
1580 default_get_reg_raw_mode (int regno
)
1582 return reg_raw_mode
[regno
];
1585 /* Return true if a leaf function should stay leaf even with profiling
1589 default_keep_leaf_when_profiled ()
1594 /* Return true if the state of option OPTION should be stored in PCH files
1595 and checked by default_pch_valid_p. Store the option's current state
1599 option_affects_pch_p (int option
, struct cl_option_state
*state
)
1601 if ((cl_options
[option
].flags
& CL_TARGET
) == 0)
1603 if ((cl_options
[option
].flags
& CL_PCH_IGNORE
) != 0)
1605 if (option_flag_var (option
, &global_options
) == &target_flags
)
1606 if (targetm
.check_pch_target_flags
)
1608 return get_option_state (&global_options
, option
, state
);
1611 /* Default version of get_pch_validity.
1612 By default, every flag difference is fatal; that will be mostly right for
1613 most targets, but completely right for very few. */
1616 default_get_pch_validity (size_t *sz
)
1618 struct cl_option_state state
;
1623 if (targetm
.check_pch_target_flags
)
1624 *sz
+= sizeof (target_flags
);
1625 for (i
= 0; i
< cl_options_count
; i
++)
1626 if (option_affects_pch_p (i
, &state
))
1629 result
= r
= XNEWVEC (char, *sz
);
1633 if (targetm
.check_pch_target_flags
)
1635 memcpy (r
, &target_flags
, sizeof (target_flags
));
1636 r
+= sizeof (target_flags
);
1639 for (i
= 0; i
< cl_options_count
; i
++)
1640 if (option_affects_pch_p (i
, &state
))
1642 memcpy (r
, state
.data
, state
.size
);
1649 /* Return a message which says that a PCH file was created with a different
1650 setting of OPTION. */
1653 pch_option_mismatch (const char *option
)
1655 return xasprintf (_("created and used with differing settings of '%s'"),
1659 /* Default version of pch_valid_p. */
1662 default_pch_valid_p (const void *data_p
, size_t len
)
1664 struct cl_option_state state
;
1665 const char *data
= (const char *)data_p
;
1668 /* -fpic and -fpie also usually make a PCH invalid. */
1669 if (data
[0] != flag_pic
)
1670 return _("created and used with different settings of -fpic");
1671 if (data
[1] != flag_pie
)
1672 return _("created and used with different settings of -fpie");
1675 /* Check target_flags. */
1676 if (targetm
.check_pch_target_flags
)
1681 memcpy (&tf
, data
, sizeof (target_flags
));
1682 data
+= sizeof (target_flags
);
1683 len
-= sizeof (target_flags
);
1684 r
= targetm
.check_pch_target_flags (tf
);
1689 for (i
= 0; i
< cl_options_count
; i
++)
1690 if (option_affects_pch_p (i
, &state
))
1692 if (memcmp (data
, state
.data
, state
.size
) != 0)
1693 return pch_option_mismatch (cl_options
[i
].opt_text
);
1701 /* Default version of cstore_mode. */
1704 default_cstore_mode (enum insn_code icode
)
1706 return insn_data
[(int) icode
].operand
[0].mode
;
1709 /* Default version of member_type_forces_blk. */
1712 default_member_type_forces_blk (const_tree
, machine_mode
)
1718 default_load_bounds_for_arg (rtx addr ATTRIBUTE_UNUSED
,
1719 rtx ptr ATTRIBUTE_UNUSED
,
1720 rtx bnd ATTRIBUTE_UNUSED
)
1726 default_store_bounds_for_arg (rtx val ATTRIBUTE_UNUSED
,
1727 rtx addr ATTRIBUTE_UNUSED
,
1728 rtx bounds ATTRIBUTE_UNUSED
,
1729 rtx to ATTRIBUTE_UNUSED
)
1735 default_load_returned_bounds (rtx slot ATTRIBUTE_UNUSED
)
1741 default_store_returned_bounds (rtx slot ATTRIBUTE_UNUSED
,
1742 rtx bounds ATTRIBUTE_UNUSED
)
1747 /* Default version of canonicalize_comparison. */
1750 default_canonicalize_comparison (int *, rtx
*, rtx
*, bool)
1754 /* Default implementation of TARGET_ATOMIC_ASSIGN_EXPAND_FENV. */
1757 default_atomic_assign_expand_fenv (tree
*, tree
*, tree
*)
1761 #ifndef PAD_VARARGS_DOWN
1762 #define PAD_VARARGS_DOWN BYTES_BIG_ENDIAN
1765 /* Build an indirect-ref expression over the given TREE, which represents a
1766 piece of a va_arg() expansion. */
1768 build_va_arg_indirect_ref (tree addr
)
1770 addr
= build_simple_mem_ref_loc (EXPR_LOCATION (addr
), addr
);
1774 /* The "standard" implementation of va_arg: read the value from the
1775 current (padded) address and increment by the (padded) size. */
1778 std_gimplify_va_arg_expr (tree valist
, tree type
, gimple_seq
*pre_p
,
1781 tree addr
, t
, type_size
, rounded_size
, valist_tmp
;
1782 unsigned HOST_WIDE_INT align
, boundary
;
1785 /* All of the alignment and movement below is for args-grow-up machines.
1786 As of 2004, there are only 3 ARGS_GROW_DOWNWARD targets, and they all
1787 implement their own specialized gimplify_va_arg_expr routines. */
1788 if (ARGS_GROW_DOWNWARD
)
1791 indirect
= pass_by_reference (NULL
, TYPE_MODE (type
), type
, false);
1793 type
= build_pointer_type (type
);
1795 align
= PARM_BOUNDARY
/ BITS_PER_UNIT
;
1796 boundary
= targetm
.calls
.function_arg_boundary (TYPE_MODE (type
), type
);
1798 /* When we align parameter on stack for caller, if the parameter
1799 alignment is beyond MAX_SUPPORTED_STACK_ALIGNMENT, it will be
1800 aligned at MAX_SUPPORTED_STACK_ALIGNMENT. We will match callee
1801 here with caller. */
1802 if (boundary
> MAX_SUPPORTED_STACK_ALIGNMENT
)
1803 boundary
= MAX_SUPPORTED_STACK_ALIGNMENT
;
1805 boundary
/= BITS_PER_UNIT
;
1807 /* Hoist the valist value into a temporary for the moment. */
1808 valist_tmp
= get_initialized_tmp_var (valist
, pre_p
, NULL
);
1810 /* va_list pointer is aligned to PARM_BOUNDARY. If argument actually
1811 requires greater alignment, we must perform dynamic alignment. */
1812 if (boundary
> align
1813 && !integer_zerop (TYPE_SIZE (type
)))
1815 t
= build2 (MODIFY_EXPR
, TREE_TYPE (valist
), valist_tmp
,
1816 fold_build_pointer_plus_hwi (valist_tmp
, boundary
- 1));
1817 gimplify_and_add (t
, pre_p
);
1819 t
= build2 (MODIFY_EXPR
, TREE_TYPE (valist
), valist_tmp
,
1820 fold_build2 (BIT_AND_EXPR
, TREE_TYPE (valist
),
1822 build_int_cst (TREE_TYPE (valist
), -boundary
)));
1823 gimplify_and_add (t
, pre_p
);
1828 /* If the actual alignment is less than the alignment of the type,
1829 adjust the type accordingly so that we don't assume strict alignment
1830 when dereferencing the pointer. */
1831 boundary
*= BITS_PER_UNIT
;
1832 if (boundary
< TYPE_ALIGN (type
))
1834 type
= build_variant_type_copy (type
);
1835 TYPE_ALIGN (type
) = boundary
;
1838 /* Compute the rounded size of the type. */
1839 type_size
= size_in_bytes (type
);
1840 rounded_size
= round_up (type_size
, align
);
1842 /* Reduce rounded_size so it's sharable with the postqueue. */
1843 gimplify_expr (&rounded_size
, pre_p
, post_p
, is_gimple_val
, fb_rvalue
);
1847 if (PAD_VARARGS_DOWN
&& !integer_zerop (rounded_size
))
1849 /* Small args are padded downward. */
1850 t
= fold_build2_loc (input_location
, GT_EXPR
, sizetype
,
1851 rounded_size
, size_int (align
));
1852 t
= fold_build3 (COND_EXPR
, sizetype
, t
, size_zero_node
,
1853 size_binop (MINUS_EXPR
, rounded_size
, type_size
));
1854 addr
= fold_build_pointer_plus (addr
, t
);
1857 /* Compute new value for AP. */
1858 t
= fold_build_pointer_plus (valist_tmp
, rounded_size
);
1859 t
= build2 (MODIFY_EXPR
, TREE_TYPE (valist
), valist
, t
);
1860 gimplify_and_add (t
, pre_p
);
1862 addr
= fold_convert (build_pointer_type (type
), addr
);
1865 addr
= build_va_arg_indirect_ref (addr
);
1867 return build_va_arg_indirect_ref (addr
);
1871 default_chkp_bound_type (void)
1873 tree res
= make_node (POINTER_BOUNDS_TYPE
);
1874 TYPE_PRECISION (res
) = TYPE_PRECISION (size_type_node
) * 2;
1875 TYPE_NAME (res
) = get_identifier ("__bounds_type");
1876 SET_TYPE_MODE (res
, targetm
.chkp_bound_mode ());
1882 default_chkp_bound_mode (void)
1888 default_builtin_chkp_function (unsigned int fcode ATTRIBUTE_UNUSED
)
1894 default_chkp_function_value_bounds (const_tree ret_type ATTRIBUTE_UNUSED
,
1895 const_tree fn_decl_or_type ATTRIBUTE_UNUSED
,
1896 bool outgoing ATTRIBUTE_UNUSED
)
1902 default_chkp_make_bounds_constant (HOST_WIDE_INT lb ATTRIBUTE_UNUSED
,
1903 HOST_WIDE_INT ub ATTRIBUTE_UNUSED
)
1909 default_chkp_initialize_bounds (tree var ATTRIBUTE_UNUSED
,
1910 tree lb ATTRIBUTE_UNUSED
,
1911 tree ub ATTRIBUTE_UNUSED
,
1912 tree
*stmts ATTRIBUTE_UNUSED
)
1918 default_setup_incoming_vararg_bounds (cumulative_args_t ca ATTRIBUTE_UNUSED
,
1919 enum machine_mode mode ATTRIBUTE_UNUSED
,
1920 tree type ATTRIBUTE_UNUSED
,
1921 int *pretend_arg_size ATTRIBUTE_UNUSED
,
1922 int second_time ATTRIBUTE_UNUSED
)
1926 /* An implementation of TARGET_CAN_USE_DOLOOP_P for targets that do
1927 not support nested low-overhead loops. */
1930 can_use_doloop_if_innermost (const widest_int
&, const widest_int
&,
1931 unsigned int loop_depth
, bool)
1933 return loop_depth
== 1;
1936 #include "gt-targhooks.h"