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* config/arm/elf.h (ASM_OUTPUT_ALIGNED_COMMON): Remove definition.
[official-gcc.git] / gcc / rtl.h
blob7783258066af1e41d61c474ddf33dd5b56248d2a
1 /* Register Transfer Language (RTL) definitions for GNU C-Compiler
2 Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
4
5 This file is part of GCC.
6
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
10 version.
11
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
15 for more details.
16
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, 59 Temple Place - Suite 330, Boston, MA
20 02111-1307, USA. */
21
22 #ifndef GCC_RTL_H
23 #define GCC_RTL_H
24
25 struct function;
26
27 #include "machmode.h"
28
29 #undef FFS /* Some systems predefine this symbol; don't let it interfere. */
30 #undef FLOAT /* Likewise. */
31 #undef ABS /* Likewise. */
32 #undef PC /* Likewise. */
33
34 /* Value used by some passes to "recognize" noop moves as valid
35 instructions. */
36 #define NOOP_MOVE_INSN_CODE INT_MAX
37
38 /* Register Transfer Language EXPRESSIONS CODES */
39
40 #define RTX_CODE enum rtx_code
41 enum rtx_code {
42
43 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM ,
44 #include "rtl.def" /* rtl expressions are documented here */
45 #undef DEF_RTL_EXPR
46
47 LAST_AND_UNUSED_RTX_CODE}; /* A convenient way to get a value for
48 NUM_RTX_CODE.
49 Assumes default enum value assignment. */
50
51 #define NUM_RTX_CODE ((int) LAST_AND_UNUSED_RTX_CODE)
52 /* The cast here, saves many elsewhere. */
53
54 extern const unsigned char rtx_length[NUM_RTX_CODE];
55 #define GET_RTX_LENGTH(CODE) (rtx_length[(int) (CODE)])
56
57 extern const char * const rtx_name[NUM_RTX_CODE];
58 #define GET_RTX_NAME(CODE) (rtx_name[(int) (CODE)])
59
60 extern const char * const rtx_format[NUM_RTX_CODE];
61 #define GET_RTX_FORMAT(CODE) (rtx_format[(int) (CODE)])
62
63 extern const char rtx_class[NUM_RTX_CODE];
64 #define GET_RTX_CLASS(CODE) (rtx_class[(int) (CODE)])
65
66 extern const unsigned char rtx_next[NUM_RTX_CODE];
67 \f
68 /* The flags and bitfields of an ADDR_DIFF_VEC. BASE is the base label
69 relative to which the offsets are calculated, as explained in rtl.def. */
70 typedef struct
71 {
72 /* Set at the start of shorten_branches - ONLY WHEN OPTIMIZING - : */
73 unsigned min_align: 8;
74 /* Flags: */
75 unsigned base_after_vec: 1; /* BASE is after the ADDR_DIFF_VEC. */
76 unsigned min_after_vec: 1; /* minimum address target label is
77 after the ADDR_DIFF_VEC. */
78 unsigned max_after_vec: 1; /* maximum address target label is
79 after the ADDR_DIFF_VEC. */
80 unsigned min_after_base: 1; /* minimum address target label is
81 after BASE. */
82 unsigned max_after_base: 1; /* maximum address target label is
83 after BASE. */
84 /* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */
85 unsigned offset_unsigned: 1; /* offsets have to be treated as unsigned. */
86 unsigned : 2;
87 unsigned scale : 8;
88 } addr_diff_vec_flags;
89
90 /* Structure used to describe the attributes of a MEM. These are hashed
91 so MEMs that the same attributes share a data structure. This means
92 they cannot be modified in place. If any element is nonzero, it means
93 the value of the corresponding attribute is unknown. */
94 /* ALIGN and SIZE are the alignment and size of the MEM itself,
95 while EXPR can describe a larger underlying object, which might have a
96 stricter alignment; OFFSET is the offset of the MEM within that object. */
97 typedef struct mem_attrs GTY(())
98 {
99 HOST_WIDE_INT alias; /* Memory alias set. */
100 tree expr; /* expr corresponding to MEM. */
101 rtx offset; /* Offset from start of DECL, as CONST_INT. */
102 rtx size; /* Size in bytes, as a CONST_INT. */
103 unsigned int align; /* Alignment of MEM in bits. */
104 } mem_attrs;
105
106 /* Structure used to describe the attributes of a REG in similar way as
107 mem_attrs does for MEM above. */
108
109 typedef struct reg_attrs GTY(())
110 {
111 tree decl; /* decl corresponding to REG. */
112 HOST_WIDE_INT offset; /* Offset from start of DECL. */
113 } reg_attrs;
114
115 /* Common union for an element of an rtx. */
116
117 union rtunion_def
118 {
119 HOST_WIDE_INT rtwint;
120 int rtint;
121 unsigned int rtuint;
122 const char *rtstr;
123 rtx rtx;
124 rtvec rtvec;
125 enum machine_mode rttype;
126 addr_diff_vec_flags rt_addr_diff_vec_flags;
127 struct cselib_val_struct *rt_cselib;
128 struct bitmap_head_def *rtbit;
129 tree rttree;
130 struct basic_block_def *bb;
131 mem_attrs *rtmem;
132 reg_attrs *rtreg;
133 };
134 typedef union rtunion_def rtunion;
135
136 /* RTL expression ("rtx"). */
137
138 struct rtx_def GTY((chain_next ("RTX_NEXT (&%h)"),
139 chain_prev ("RTX_PREV (&%h)")))
140 {
141 /* The kind of expression this is. */
142 ENUM_BITFIELD(rtx_code) code: 16;
143
144 /* The kind of value the expression has. */
145 ENUM_BITFIELD(machine_mode) mode : 8;
146
147 /* 1 in a MEM if we should keep the alias set for this mem unchanged
148 when we access a component.
149 1 in a CALL_INSN if it is a sibling call.
150 1 in a SET that is for a return.
151 In a CODE_LABEL, part of the two-bit alternate entry field. */
152 unsigned int jump : 1;
153 /* In a CODE_LABEL, part of the two-bit alternate entry field.
154 1 in a MEM if it cannot trap. */
155 unsigned int call : 1;
156 /* 1 in a REG, MEM, or CONCAT if the value is set at most once, anywhere.
157 1 in a SUBREG if it references an unsigned object whose mode has been
158 from a promoted to a wider mode.
159 1 in a SYMBOL_REF if it addresses something in the per-function
160 constants pool.
161 1 in a CALL_INSN, NOTE, or EXPR_LIST for a const or pure call.
162 1 in a JUMP_INSN, CALL_INSN, or INSN of an annulling branch. */
163 unsigned int unchanging : 1;
164 /* 1 in a MEM or ASM_OPERANDS expression if the memory reference is volatile.
165 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL, BARRIER, or NOTE
166 if it has been deleted.
167 1 in a REG expression if corresponds to a variable declared by the user,
168 0 for an internally generated temporary.
169 1 in a SUBREG with a negative value.
170 1 in a LABEL_REF or in a REG_LABEL note for a non-local label.
171 In a SYMBOL_REF, this flag is used for machine-specific purposes. */
172 unsigned int volatil : 1;
173 /* 1 in a MEM referring to a field of an aggregate.
174 0 if the MEM was a variable or the result of a * operator in C;
175 1 if it was the result of a . or -> operator (on a struct) in C.
176 1 in a REG if the register is used only in exit code a loop.
177 1 in a SUBREG expression if was generated from a variable with a
178 promoted mode.
179 1 in a CODE_LABEL if the label is used for nonlocal gotos
180 and must not be deleted even if its count is zero.
181 1 in a LABEL_REF if this is a reference to a label outside the
182 current loop.
183 1 in an INSN, JUMP_INSN or CALL_INSN if this insn must be scheduled
184 together with the preceding insn. Valid only within sched.
185 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
186 from the target of a branch. Valid from reorg until end of compilation;
187 cleared before used.
188 1 in an INSN, JUMP_INSN or CALL_INSN or related rtx if this insn is
189 dead code. Valid only during dead-code elimination phase; cleared
190 before use. */
191 unsigned int in_struct : 1;
192 /* At the end of RTL generation, 1 if this rtx is used. This is used for
193 copying shared structure. See `unshare_all_rtl'.
194 In a REG, this is not needed for that purpose, and used instead
195 in `leaf_renumber_regs_insn'.
196 1 in a SYMBOL_REF, means that emit_library_call
197 has used it as the function. */
198 unsigned int used : 1;
199 /* Nonzero if this rtx came from procedure integration.
200 1 in a REG or PARALLEL means this rtx refers to the return value
201 of the current function.
202 1 in a SYMBOL_REF if the symbol is weak. */
203 unsigned integrated : 1;
204 /* 1 in an INSN or a SET if this rtx is related to the call frame,
205 either changing how we compute the frame address or saving and
206 restoring registers in the prologue and epilogue.
207 1 in a MEM if the MEM refers to a scalar, rather than a member of
208 an aggregate.
209 1 in a REG if the register is a pointer.
210 1 in a SYMBOL_REF if it addresses something in the per-function
211 constant string pool. */
212 unsigned frame_related : 1;
213
214 /* The first element of the operands of this rtx.
215 The number of operands and their types are controlled
216 by the `code' field, according to rtl.def. */
217 rtunion GTY ((special ("rtx_def"),
218 desc ("GET_CODE (&%0)"))) fld[1];
219 };
220
221 #define NULL_RTX (rtx) 0
222
223 /* The "next" and "previous" RTX, relative to this one. */
224
225 #define RTX_NEXT(X) (rtx_next[GET_CODE (X)] == 0 ? NULL \
226 : *(rtx *)(((char *)X) + rtx_next[GET_CODE (X)]))
227
228 /* FIXME: the "NEXT_INSN (PREV_INSN (X)) == X" condition shouldn't be needed.
229 */
230 #define RTX_PREV(X) ((GET_CODE (X) == INSN \
231 || GET_CODE (X) == CALL_INSN \
232 || GET_CODE (X) == JUMP_INSN \
233 || GET_CODE (X) == NOTE \
234 || GET_CODE (X) == BARRIER \
235 || GET_CODE (X) == CODE_LABEL) \
236 && PREV_INSN (X) != NULL \
237 && NEXT_INSN (PREV_INSN (X)) == X \
238 ? PREV_INSN (X) : NULL)
239
240 /* Define macros to access the `code' field of the rtx. */
241
242 #define GET_CODE(RTX) ((enum rtx_code) (RTX)->code)
243 #define PUT_CODE(RTX, CODE) ((RTX)->code = (ENUM_BITFIELD(rtx_code)) (CODE))
244
245 #define GET_MODE(RTX) ((enum machine_mode) (RTX)->mode)
246 #define PUT_MODE(RTX, MODE) ((RTX)->mode = (ENUM_BITFIELD(machine_mode)) (MODE))
247
248 /* RTL vector. These appear inside RTX's when there is a need
249 for a variable number of things. The principle use is inside
250 PARALLEL expressions. */
251
252 struct rtvec_def GTY(()) {
253 int num_elem; /* number of elements */
254 rtx GTY ((length ("%h.num_elem"))) elem[1];
255 };
256
257 #define NULL_RTVEC (rtvec) 0
258
259 #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
260 #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
261
262 /* Predicate yielding nonzero iff X is an rtl for a register. */
263 #define REG_P(X) (GET_CODE (X) == REG)
264
265 /* Predicate yielding nonzero iff X is a label insn. */
266 #define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
267
268 /* Predicate yielding nonzero iff X is a jump insn. */
269 #define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
270
271 /* Predicate yielding nonzero iff X is a note insn. */
272 #define NOTE_P(X) (GET_CODE (X) == NOTE)
273
274 /* Predicate yielding nonzero iff X is a barrier insn. */
275 #define BARRIER_P(X) (GET_CODE (X) == BARRIER)
276
277 /* Predicate yielding nonzero iff X is a data for a jump table. */
278 #define JUMP_TABLE_DATA_P(INSN) \
279 (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \
280 GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC))
281
282 /* 1 if X is a constant value that is an integer. */
283
284 #define CONSTANT_P(X) \
285 (GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \
286 || GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST_DOUBLE \
287 || GET_CODE (X) == CONST || GET_CODE (X) == HIGH \
288 || GET_CODE (X) == CONST_VECTOR \
289 || GET_CODE (X) == CONSTANT_P_RTX)
290
291 /* General accessor macros for accessing the fields of an rtx. */
292
293 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
294 /* The bit with a star outside the statement expr and an & inside is
295 so that N can be evaluated only once. */
296 #define RTL_CHECK1(RTX, N, C1) __extension__ \
297 (*({ rtx const _rtx = (RTX); const int _n = (N); \
298 const enum rtx_code _code = GET_CODE (_rtx); \
299 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
300 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
301 __FUNCTION__); \
302 if (GET_RTX_FORMAT(_code)[_n] != C1) \
303 rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \
304 __FUNCTION__); \
305 &_rtx->fld[_n]; }))
306
307 #define RTL_CHECK2(RTX, N, C1, C2) __extension__ \
308 (*({ rtx const _rtx = (RTX); const int _n = (N); \
309 const enum rtx_code _code = GET_CODE (_rtx); \
310 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
311 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
312 __FUNCTION__); \
313 if (GET_RTX_FORMAT(_code)[_n] != C1 \
314 && GET_RTX_FORMAT(_code)[_n] != C2) \
315 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
316 __FUNCTION__); \
317 &_rtx->fld[_n]; }))
318
319 #define RTL_CHECKC1(RTX, N, C) __extension__ \
320 (*({ rtx const _rtx = (RTX); const int _n = (N); \
321 if (GET_CODE (_rtx) != (C)) \
322 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
323 __FUNCTION__); \
324 &_rtx->fld[_n]; }))
325
326 #define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \
327 (*({ rtx const _rtx = (RTX); const int _n = (N); \
328 const enum rtx_code _code = GET_CODE (_rtx); \
329 if (_code != (C1) && _code != (C2)) \
330 rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__, \
331 __FUNCTION__); \
332 &_rtx->fld[_n]; }))
333
334 #define RTVEC_ELT(RTVEC, I) __extension__ \
335 (*({ rtvec const _rtvec = (RTVEC); const int _i = (I); \
336 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
337 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
338 __FUNCTION__); \
339 &_rtvec->elem[_i]; }))
340
341 extern void rtl_check_failed_bounds PARAMS ((rtx, int,
342 const char *, int, const char *))
343 ATTRIBUTE_NORETURN;
344 extern void rtl_check_failed_type1 PARAMS ((rtx, int, int,
345 const char *, int, const char *))
346 ATTRIBUTE_NORETURN;
347 extern void rtl_check_failed_type2 PARAMS ((rtx, int, int, int,
348 const char *, int, const char *))
349 ATTRIBUTE_NORETURN;
350 extern void rtl_check_failed_code1 PARAMS ((rtx, enum rtx_code,
351 const char *, int, const char *))
352 ATTRIBUTE_NORETURN;
353 extern void rtl_check_failed_code2 PARAMS ((rtx, enum rtx_code, enum rtx_code,
354 const char *, int, const char *))
355 ATTRIBUTE_NORETURN;
356 extern void rtvec_check_failed_bounds PARAMS ((rtvec, int,
357 const char *, int, const char *))
358 ATTRIBUTE_NORETURN;
359
360 #else /* not ENABLE_RTL_CHECKING */
361
362 #define RTL_CHECK1(RTX, N, C1) ((RTX)->fld[N])
363 #define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->fld[N])
364 #define RTL_CHECKC1(RTX, N, C) ((RTX)->fld[N])
365 #define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->fld[N])
366 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
367
368 #endif
369
370 /* General accessor macros for accessing the flags of an rtx. */
371
372 /* Access an individual rtx flag, with no checking of any kind. */
373 #define RTX_FLAG(RTX, FLAG) ((RTX)->FLAG)
374
375 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION >= 2007)
376 #define RTL_FLAG_CHECK1(NAME, RTX, C1) __extension__ \
377 ({ rtx const _rtx = (RTX); \
378 if (GET_CODE(_rtx) != C1) \
379 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
380 __FUNCTION__); \
381 _rtx; })
382
383 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) __extension__ \
384 ({ rtx const _rtx = (RTX); \
385 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2) \
386 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
387 __FUNCTION__); \
388 _rtx; })
389
390 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) __extension__ \
391 ({ rtx const _rtx = (RTX); \
392 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
393 && GET_CODE(_rtx) != C3) \
394 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
395 __FUNCTION__); \
396 _rtx; })
397
398 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) __extension__ \
399 ({ rtx const _rtx = (RTX); \
400 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
401 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4) \
402 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
403 __FUNCTION__); \
404 _rtx; })
405
406 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) __extension__ \
407 ({ rtx const _rtx = (RTX); \
408 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
409 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
410 && GET_CODE(_rtx) != C5) \
411 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
412 __FUNCTION__); \
413 _rtx; })
414
415 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) \
416 __extension__ \
417 ({ rtx const _rtx = (RTX); \
418 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
419 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
420 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6) \
421 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
422 __FUNCTION__); \
423 _rtx; })
424
425 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) \
426 __extension__ \
427 ({ rtx const _rtx = (RTX); \
428 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
429 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
430 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
431 && GET_CODE(_rtx) != C7) \
432 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
433 __FUNCTION__); \
434 _rtx; })
435
436 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) \
437 __extension__ \
438 ({ rtx const _rtx = (RTX); \
439 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
440 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
441 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
442 && GET_CODE(_rtx) != C7 && GET_CODE(_rtx) != C8) \
443 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
444 __FUNCTION__); \
445 _rtx; })
446
447 extern void rtl_check_failed_flag PARAMS ((const char *, rtx, const char *,
448 int, const char *))
449 ATTRIBUTE_NORETURN
450 ;
451
452 #else /* not ENABLE_RTL_FLAG_CHECKING */
453
454 #define RTL_FLAG_CHECK1(NAME, RTX, C1) (RTX)
455 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) (RTX)
456 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) (RTX)
457 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) (RTX)
458 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) (RTX)
459 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) (RTX)
460 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) (RTX)
461 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) (RTX)
462 #endif
463
464 #define CLEAR_RTX_FLAGS(RTX) \
465 do { \
466 rtx const _rtx = (RTX); \
467 _rtx->call = 0; \
468 _rtx->frame_related = 0; \
469 _rtx->in_struct = 0; \
470 _rtx->integrated = 0; \
471 _rtx->jump = 0; \
472 _rtx->unchanging = 0; \
473 _rtx->used = 0; \
474 _rtx->volatil = 0; \
475 } while (0)
476
477 #define XWINT(RTX, N) (RTL_CHECK1 (RTX, N, 'w').rtwint)
478 #define XINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rtint)
479 #define XSTR(RTX, N) (RTL_CHECK2 (RTX, N, 's', 'S').rtstr)
480 #define XEXP(RTX, N) (RTL_CHECK2 (RTX, N, 'e', 'u').rtx)
481 #define XVEC(RTX, N) (RTL_CHECK2 (RTX, N, 'E', 'V').rtvec)
482 #define XMODE(RTX, N) (RTL_CHECK1 (RTX, N, 'M').rttype)
483 #define XBITMAP(RTX, N) (RTL_CHECK1 (RTX, N, 'b').rtbit)
484 #define XTREE(RTX, N) (RTL_CHECK1 (RTX, N, 't').rttree)
485 #define XBBDEF(RTX, N) (RTL_CHECK1 (RTX, N, 'B').bb)
486 #define XTMPL(RTX, N) (RTL_CHECK1 (RTX, N, 'T').rtstr)
487
488 #define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
489 #define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
490
491 /* These are like XWINT, etc. except that they expect a '0' field instead
492 of the normal type code. */
493
494 #define X0WINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtwint)
495 #define X0INT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtint)
496 #define X0UINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtuint)
497 #define X0STR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtstr)
498 #define X0EXP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtx)
499 #define X0VEC(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtvec)
500 #define X0MODE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rttype)
501 #define X0BITMAP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtbit)
502 #define X0TREE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rttree)
503 #define X0BBDEF(RTX, N) (RTL_CHECK1 (RTX, N, '0').bb)
504 #define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags)
505 #define X0CSELIB(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_cselib)
506 #define X0MEMATTR(RTX, N) (RTL_CHECKC1 (RTX, N, MEM).rtmem)
507 #define X0REGATTR(RTX, N) (RTL_CHECKC1 (RTX, N, REG).rtreg)
508
509 #define XCWINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtwint)
510 #define XCINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtint)
511 #define XCUINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtuint)
512 #define XCSTR(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtstr)
513 #define XCEXP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtx)
514 #define XCVEC(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtvec)
515 #define XCMODE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rttype)
516 #define XCBITMAP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtbit)
517 #define XCTREE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rttree)
518 #define XCBBDEF(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).bb)
519 #define XCADVFLAGS(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_addr_diff_vec_flags)
520 #define XCCSELIB(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cselib)
521
522 #define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
523 #define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
524
525 #define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2 (RTX, N, C1, C2).rtx)
526 \f
527 /* ACCESS MACROS for particular fields of insns. */
528
529 /* Determines whether X is an insn. */
530 #define INSN_P(X) (GET_RTX_CLASS (GET_CODE(X)) == 'i')
531
532 /* Holds a unique number for each insn.
533 These are not necessarily sequentially increasing. */
534 #define INSN_UID(INSN) XINT (INSN, 0)
535
536 /* Chain insns together in sequence. */
537 #define PREV_INSN(INSN) XEXP (INSN, 1)
538 #define NEXT_INSN(INSN) XEXP (INSN, 2)
539
540 #define BLOCK_FOR_INSN(INSN) XBBDEF (INSN, 3)
541 #define INSN_SCOPE(INSN) XTREE (INSN, 4)
542 /* The body of an insn. */
543 #define PATTERN(INSN) XEXP (INSN, 5)
544
545 /* Code number of instruction, from when it was recognized.
546 -1 means this instruction has not been recognized yet. */
547 #define INSN_CODE(INSN) XINT (INSN, 6)
548
549 /* Set up in flow.c; empty before then.
550 Holds a chain of INSN_LIST rtx's whose first operands point at
551 previous insns with direct data-flow connections to this one.
552 That means that those insns set variables whose next use is in this insn.
553 They are always in the same basic block as this insn. */
554 #define LOG_LINKS(INSN) XEXP(INSN, 7)
555
556 #define RTX_INTEGRATED_P(RTX) \
557 (RTL_FLAG_CHECK8("RTX_INTEGRATED_P", (RTX), INSN, CALL_INSN, \
558 JUMP_INSN, INSN_LIST, BARRIER, CODE_LABEL, CONST, \
559 NOTE)->integrated)
560 #define RTX_UNCHANGING_P(RTX) \
561 (RTL_FLAG_CHECK3("RTX_UNCHANGING_P", (RTX), REG, MEM, CONCAT)->unchanging)
562 #define RTX_FRAME_RELATED_P(RTX) \
563 (RTL_FLAG_CHECK5("RTX_FRAME_RELATED_P", (RTX), INSN, CALL_INSN, \
564 JUMP_INSN, BARRIER, SET)->frame_related)
565
566 /* 1 if RTX is an insn that has been deleted. */
567 #define INSN_DELETED_P(RTX) \
568 (RTL_FLAG_CHECK6("INSN_DELETED_P", (RTX), INSN, CALL_INSN, JUMP_INSN, \
569 CODE_LABEL, BARRIER, NOTE)->volatil)
570
571 /* 1 if RTX is a call to a const or pure function. */
572 #define CONST_OR_PURE_CALL_P(RTX) \
573 (RTL_FLAG_CHECK3("CONST_OR_PURE_CALL_P", (RTX), CALL_INSN, NOTE, \
574 EXPR_LIST)->unchanging)
575
576 /* 1 if RTX is a call_insn for a sibling call. */
577 #define SIBLING_CALL_P(RTX) \
578 (RTL_FLAG_CHECK1("SIBLING_CALL_P", (RTX), CALL_INSN)->jump)
579
580 /* 1 if RTX is a jump_insn, call_insn, or insn that is an annulling branch. */
581 #define INSN_ANNULLED_BRANCH_P(RTX) \
582 (RTL_FLAG_CHECK3("INSN_ANNULLED_BRANCH_P", (RTX), JUMP_INSN, CALL_INSN, INSN)->unchanging)
583
584 /* 1 if RTX is an insn that is dead code. Valid only for dead-code
585 elimination phase. */
586 #define INSN_DEAD_CODE_P(RTX) \
587 (RTL_FLAG_CHECK3("INSN_DEAD_CODE_P", (RTX), INSN, CALL_INSN, JUMP_INSN)->in_struct)
588
589 /* 1 if RTX is an insn in a delay slot and is from the target of the branch.
590 If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
591 executed if the branch is taken. For annulled branches with this bit
592 clear, the insn should be executed only if the branch is not taken. */
593 #define INSN_FROM_TARGET_P(RTX) \
594 (RTL_FLAG_CHECK3("INSN_FROM_TARGET_P", (RTX), INSN, JUMP_INSN, CALL_INSN)->in_struct)
595
596 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
597
598 #define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
599
600 /* Holds a list of notes on what this insn does to various REGs.
601 It is a chain of EXPR_LIST rtx's, where the second operand is the
602 chain pointer and the first operand is the REG being described.
603 The mode field of the EXPR_LIST contains not a real machine mode
604 but a value from enum reg_note. */
605
606 #define REG_NOTES(INSN) XEXP(INSN, 8)
607
608 /* Don't forget to change reg_note_name in rtl.c. */
609 enum reg_note
610 {
611 /* The value in REG dies in this insn (i.e., it is not needed past
612 this insn). If REG is set in this insn, the REG_DEAD note may,
613 but need not, be omitted. */
614 REG_DEAD = 1,
615
616 /* The REG is autoincremented or autodecremented. */
617 REG_INC,
618
619 /* Describes the insn as a whole; it says that the insn sets a register
620 to a constant value or to be equivalent to a memory address. If the
621 register is spilled to the stack then the constant value should be
622 substituted for it. The contents of the REG_EQUIV is the constant
623 value or memory address, which may be different from the source of
624 the SET although it has the same value. A REG_EQUIV note may also
625 appear on an insn which copies a register parameter to a pseudo-register,
626 if there is a memory address which could be used to hold that
627 pseudo-register throughout the function. */
628 REG_EQUIV,
629
630 /* Like REG_EQUIV except that the destination is only momentarily equal
631 to the specified rtx. Therefore, it cannot be used for substitution;
632 but it can be used for cse. */
633 REG_EQUAL,
634
635 /* The register set in this insn held 0 before the insn. The contents of
636 the note is the insn that stored the 0. If that insn is deleted or
637 patched to a NOTE, the REG_WAS_0 is inoperative. The REG_WAS_0 note
638 is actually an INSN_LIST, not an EXPR_LIST. */
639 REG_WAS_0,
640
641 /* This insn copies the return-value of a library call out of the hard reg
642 for return values. This note is actually an INSN_LIST and it points to
643 the first insn involved in setting up arguments for the call. flow.c
644 uses this to delete the entire library call when its result is dead. */
645 REG_RETVAL,
646
647 /* The inverse of REG_RETVAL: it goes on the first insn of the library call
648 and points at the one that has the REG_RETVAL. This note is also an
649 INSN_LIST. */
650 REG_LIBCALL,
651
652 /* The register is always nonnegative during the containing loop. This is
653 used in branches so that decrement and branch instructions terminating
654 on zero can be matched. There must be an insn pattern in the md file
655 named `decrement_and_branch_until_zero' or else this will never be added
656 to any instructions. */
657 REG_NONNEG,
658
659 /* There is no conflict *after this insn* between the register in the note
660 and the destination of this insn. */
661 REG_NO_CONFLICT,
662
663 /* Identifies a register set in this insn and never used. */
664 REG_UNUSED,
665
666 /* REG_CC_SETTER and REG_CC_USER link a pair of insns that set and use CC0,
667 respectively. Normally, these are required to be consecutive insns, but
668 we permit putting a cc0-setting insn in the delay slot of a branch as
669 long as only one copy of the insn exists. In that case, these notes
670 point from one to the other to allow code generation to determine what
671 any require information and to properly update CC_STATUS. These notes
672 are INSN_LISTs. */
673 REG_CC_SETTER, REG_CC_USER,
674
675 /* Points to a CODE_LABEL. Used by non-JUMP_INSNs to say that the
676 CODE_LABEL contained in the REG_LABEL note is used by the insn.
677 This note is an INSN_LIST. */
678 REG_LABEL,
679
680 /* REG_DEP_ANTI and REG_DEP_OUTPUT are used in LOG_LINKS to represent
681 write-after-read and write-after-write dependencies respectively.
682 Data dependencies, which are the only type of LOG_LINK created by
683 flow, are represented by a 0 reg note kind. */
684 REG_DEP_ANTI, REG_DEP_OUTPUT,
685
686 /* REG_BR_PROB is attached to JUMP_INSNs and CALL_INSNs.
687 It has an integer value. For jumps, it is the probability that this is a
688 taken branch. For calls, it is the probability that this call won't
689 return. */
690 REG_BR_PROB,
691
692 /* Attached to a call insn; indicates that the call is malloc-like and
693 that the pointer returned cannot alias anything else. */
694 REG_NOALIAS,
695
696 /* Used to optimize rtl generated by dynamic stack allocations for targets
697 where SETJMP_VIA_SAVE_AREA is true. */
698 REG_SAVE_AREA,
699
700 /* REG_BR_PRED is attached to JUMP_INSNs and CALL_INSNSs. It contains
701 CONCAT of two integer value. First specifies the branch predictor
702 that added the note, second specifies the predicted hitrate of branch
703 in the same format as REG_BR_PROB note uses. */
704 REG_BR_PRED,
705
706 /* Attached to insns that are RTX_FRAME_RELATED_P, but are too complex
707 for DWARF to interpret what they imply. The attached rtx is used
708 instead of intuition. */
709 REG_FRAME_RELATED_EXPR,
710
711 /* Indicates that REG holds the exception context for the function.
712 This context is shared by inline functions, so the code to acquire
713 the real exception context is delayed until after inlining. */
714 REG_EH_CONTEXT,
715
716 /* Indicates what exception region an INSN belongs in. This is used to
717 indicate what region to which a call may throw. REGION 0 indicates
718 that a call cannot throw at all. REGION -1 indicates that it cannot
719 throw, nor will it execute a non-local goto. */
720 REG_EH_REGION,
721
722 /* Used by haifa-sched to save NOTE_INSN notes across scheduling. */
723 REG_SAVE_NOTE,
724
725 /* Indicates that this insn (which is part of the prologue) computes
726 a value which might not be used later, and if so it's OK to delete
727 the insn. Normally, deleting any insn in the prologue is an error.
728 At present the parameter is unused and set to (const_int 0). */
729 REG_MAYBE_DEAD,
730
731 /* Indicates that a call does not return. */
732 REG_NORETURN,
733
734 /* Indicates that an indirect jump is a non-local goto instead of a
735 computed goto. */
736 REG_NON_LOCAL_GOTO,
737
738 /* This kind of note is generated at each to `setjmp',
739 and similar functions that can return twice. */
740 REG_SETJMP,
741
742 /* Indicate calls that always returns. */
743 REG_ALWAYS_RETURN,
744
745 /* Indicate that the memory load references a vtable. The expression
746 is of the form (plus (symbol_ref vtable_sym) (const_int offset)). */
747 REG_VTABLE_REF
748 };
749
750 /* The base value for branch probability notes. */
751 #define REG_BR_PROB_BASE 10000
752
753 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
754 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
755 #define PUT_REG_NOTE_KIND(LINK, KIND) \
756 PUT_MODE (LINK, (enum machine_mode) (KIND))
757
758 /* Names for REG_NOTE's in EXPR_LIST insn's. */
759
760 extern const char * const reg_note_name[];
761 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
762
763 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
764 USE and CLOBBER expressions.
765 USE expressions list the registers filled with arguments that
766 are passed to the function.
767 CLOBBER expressions document the registers explicitly clobbered
768 by this CALL_INSN.
769 Pseudo registers can not be mentioned in this list. */
770 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 9)
771
772 /* The label-number of a code-label. The assembler label
773 is made from `L' and the label-number printed in decimal.
774 Label numbers are unique in a compilation. */
775 #define CODE_LABEL_NUMBER(INSN) XINT (INSN, 6)
776
777 #define LINE_NUMBER NOTE
778
779 /* In a NOTE that is a line number, this is a string for the file name that the
780 line is in. We use the same field to record block numbers temporarily in
781 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
782 between ints and pointers if we use a different macro for the block number.)
783 */
784
785 #define NOTE_SOURCE_FILE(INSN) XCSTR (INSN, 4, NOTE)
786 #define NOTE_BLOCK(INSN) XCTREE (INSN, 4, NOTE)
787 #define NOTE_EH_HANDLER(INSN) XCINT (INSN, 4, NOTE)
788 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 4, NOTE)
789 #define NOTE_EXPECTED_VALUE(INSN) XCEXP (INSN, 4, NOTE)
790 #define NOTE_PREDICTION(INSN) XCINT (INSN, 4, NOTE)
791 #define NOTE_PRECONDITIONED(INSN) XCINT (INSN, 4, NOTE)
792
793 /* In a NOTE that is a line number, this is the line number.
794 Other kinds of NOTEs are identified by negative numbers here. */
795 #define NOTE_LINE_NUMBER(INSN) XCINT (INSN, 5, NOTE)
796
797 /* Nonzero if INSN is a note marking the beginning of a basic block. */
798 #define NOTE_INSN_BASIC_BLOCK_P(INSN) \
799 (GET_CODE (INSN) == NOTE \
800 && NOTE_LINE_NUMBER (INSN) == NOTE_INSN_BASIC_BLOCK)
801
802 /* Algorithm and flags for prediction. */
803 #define NOTE_PREDICTION_ALG(INSN) (XCINT(INSN, 4, NOTE)>>8)
804 #define NOTE_PREDICTION_FLAGS(INSN) (XCINT(INSN, 4, NOTE)&0xff)
805 #define NOTE_PREDICT(ALG,FLAGS) ((ALG<<8)+(FLAGS))
806
807 /* Codes that appear in the NOTE_LINE_NUMBER field
808 for kinds of notes that are not line numbers.
809
810 Notice that we do not try to use zero here for any of
811 the special note codes because sometimes the source line
812 actually can be zero! This happens (for example) when we
813 are generating code for the per-translation-unit constructor
814 and destructor routines for some C++ translation unit.
815
816 If you should change any of the following values, or if you
817 should add a new value here, don't forget to change the
818 note_insn_name array in rtl.c. */
819
820 enum insn_note
821 {
822 /* Keep all of these numbers negative. Adjust as needed. */
823 NOTE_INSN_BIAS = -100,
824
825 /* This note is used to get rid of an insn
826 when it isn't safe to patch the insn out of the chain. */
827 NOTE_INSN_DELETED,
828
829 /* These are used to mark the beginning and end of a lexical block.
830 See NOTE_BLOCK, identify_blocks and reorder_blocks. */
831 NOTE_INSN_BLOCK_BEG,
832 NOTE_INSN_BLOCK_END,
833
834 /* These mark the extremes of a loop. */
835 NOTE_INSN_LOOP_BEG,
836 NOTE_INSN_LOOP_END,
837
838 /* Generated at the place in a loop that `continue' jumps to. */
839 NOTE_INSN_LOOP_CONT,
840 /* Generated at the start of a duplicated exit test. */
841 NOTE_INSN_LOOP_VTOP,
842
843 /* Generated at the end of a conditional at the top of the loop.
844 This is used to perform a lame form of loop rotation in lieu
845 of actually understanding the loop structure. The note is
846 discarded after rotation is complete. */
847 NOTE_INSN_LOOP_END_TOP_COND,
848
849 /* This kind of note is generated at the end of the function body,
850 just before the return insn or return label. In an optimizing
851 compilation it is deleted by the first jump optimization, after
852 enabling that optimizer to determine whether control can fall
853 off the end of the function body without a return statement. */
854 NOTE_INSN_FUNCTION_END,
855
856 /* This marks the point immediately after the last prologue insn. */
857 NOTE_INSN_PROLOGUE_END,
858
859 /* This marks the point immediately prior to the first epilogue insn. */
860 NOTE_INSN_EPILOGUE_BEG,
861
862 /* Generated in place of user-declared labels when they are deleted. */
863 NOTE_INSN_DELETED_LABEL,
864
865 /* This note indicates the start of the real body of the function,
866 i.e. the point just after all of the parms have been moved into
867 their homes, etc. */
868 NOTE_INSN_FUNCTION_BEG,
869
870 /* These note where exception handling regions begin and end.
871 Uses NOTE_EH_HANDLER to identify the region in question. */
872 NOTE_INSN_EH_REGION_BEG,
873 NOTE_INSN_EH_REGION_END,
874
875 /* Generated whenever a duplicate line number note is output. For example,
876 one is output after the end of an inline function, in order to prevent
877 the line containing the inline call from being counted twice in gcov. */
878 NOTE_INSN_REPEATED_LINE_NUMBER,
879
880 /* Record the struct for the following basic block. Uses NOTE_BASIC_BLOCK. */
881 NOTE_INSN_BASIC_BLOCK,
882
883 /* Record the expected value of a register at a location. Uses
884 NOTE_EXPECTED_VALUE; stored as (eq (reg) (const_int)). */
885 NOTE_INSN_EXPECTED_VALUE,
886
887 /* Record a prediction. Uses NOTE_PREDICTION. */
888 NOTE_INSN_PREDICTION,
889
890 NOTE_INSN_MAX
891 };
892
893 /* Names for NOTE insn's other than line numbers. */
894
895 extern const char * const note_insn_name[NOTE_INSN_MAX - NOTE_INSN_BIAS];
896 #define GET_NOTE_INSN_NAME(NOTE_CODE) \
897 (note_insn_name[(NOTE_CODE) - (int) NOTE_INSN_BIAS])
898
899 /* The name of a label, in case it corresponds to an explicit label
900 in the input source code. */
901 #define LABEL_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL)
902
903 /* In jump.c, each label contains a count of the number
904 of LABEL_REFs that point at it, so unused labels can be deleted. */
905 #define LABEL_NUSES(RTX) XCINT (RTX, 4, CODE_LABEL)
906
907 /* Labels carry a two-bit field composed of the ->jump and ->call
908 bits. This field indicates whether the label is an alternate
909 entry point, and if so, what kind. */
910 enum label_kind
911 {
912 LABEL_NORMAL = 0, /* ordinary label */
913 LABEL_STATIC_ENTRY, /* alternate entry point, not exported */
914 LABEL_GLOBAL_ENTRY, /* alternate entry point, exported */
915 LABEL_WEAK_ENTRY /* alternate entry point, exported as weak symbol */
916 };
917
918 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION > 2007)
919
920 /* Retrieve the kind of LABEL. */
921 #define LABEL_KIND(LABEL) __extension__ \
922 ({ rtx const _label = (LABEL); \
923 if (GET_CODE (_label) != CODE_LABEL) \
924 rtl_check_failed_flag ("LABEL_KIND", _label, __FILE__, __LINE__, \
925 __FUNCTION__); \
926 (enum label_kind) ((_label->jump << 1) | _label->call); })
927
928 /* Set the kind of LABEL. */
929 #define SET_LABEL_KIND(LABEL, KIND) do { \
930 rtx _label = (LABEL); \
931 unsigned int _kind = (KIND); \
932 if (GET_CODE (_label) != CODE_LABEL) \
933 rtl_check_failed_flag ("SET_LABEL_KIND", _label, __FILE__, __LINE__, \
934 __FUNCTION__); \
935 _label->jump = ((_kind >> 1) & 1); \
936 _label->call = (_kind & 1); \
937 } while (0)
938
939 #else
940
941 /* Retrieve the kind of LABEL. */
942 #define LABEL_KIND(LABEL) \
943 ((enum label_kind) (((LABEL)->jump << 1) | (LABEL)->call))
944
945 /* Set the kind of LABEL. */
946 #define SET_LABEL_KIND(LABEL, KIND) do { \
947 rtx _label = (LABEL); \
948 unsigned int _kind = (KIND); \
949 _label->jump = ((_kind >> 1) & 1); \
950 _label->call = (_kind & 1); \
951 } while (0)
952
953 #endif /* rtl flag checking */
954
955 #define LABEL_ALT_ENTRY_P(LABEL) (LABEL_KIND (LABEL) != LABEL_NORMAL)
956
957 /* The original regno this ADDRESSOF was built for. */
958 #define ADDRESSOF_REGNO(RTX) XCUINT (RTX, 1, ADDRESSOF)
959
960 /* The variable in the register we took the address of. */
961 #define ADDRESSOF_DECL(RTX) XCTREE (RTX, 2, ADDRESSOF)
962
963 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
964 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
965 be decremented and possibly the label can be deleted. */
966 #define JUMP_LABEL(INSN) XCEXP (INSN, 9, JUMP_INSN)
967
968 /* Once basic blocks are found in flow.c,
969 each CODE_LABEL starts a chain that goes through
970 all the LABEL_REFs that jump to that label.
971 The chain eventually winds up at the CODE_LABEL: it is circular. */
972 #define LABEL_REFS(LABEL) XCEXP (LABEL, 5, CODE_LABEL)
973 \f
974 /* This is the field in the LABEL_REF through which the circular chain
975 of references to a particular label is linked.
976 This chain is set up in flow.c. */
977
978 #define LABEL_NEXTREF(REF) XCEXP (REF, 1, LABEL_REF)
979
980 /* Once basic blocks are found in flow.c,
981 Each LABEL_REF points to its containing instruction with this field. */
982
983 #define CONTAINING_INSN(RTX) XCEXP (RTX, 2, LABEL_REF)
984
985 /* For a REG rtx, REGNO extracts the register number. ORIGINAL_REGNO holds
986 the number the register originally had; for a pseudo register turned into
987 a hard reg this will hold the old pseudo register number. */
988
989 #define REGNO(RTX) XCUINT (RTX, 0, REG)
990 #define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
991
992 /* 1 if RTX is a reg or parallel that is the current function's return
993 value. */
994 #define REG_FUNCTION_VALUE_P(RTX) \
995 (RTL_FLAG_CHECK2("REG_FUNCTION_VALUE_P", (RTX), REG, PARALLEL)->integrated)
996
997 /* 1 if RTX is a reg that corresponds to a variable declared by the user. */
998 #define REG_USERVAR_P(RTX) \
999 (RTL_FLAG_CHECK1("REG_USERVAR_P", (RTX), REG)->volatil)
1000
1001 /* 1 if RTX is a reg that holds a pointer value. */
1002 #define REG_POINTER(RTX) \
1003 (RTL_FLAG_CHECK1("REG_POINTER", (RTX), REG)->frame_related)
1004
1005 /* 1 if the given register REG corresponds to a hard register. */
1006 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
1007
1008 /* 1 if the given register number REG_NO corresponds to a hard register. */
1009 #define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
1010
1011 /* For a CONST_INT rtx, INTVAL extracts the integer. */
1012
1013 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
1014
1015 /* For a CONST_DOUBLE:
1016 For a DImode, there are two integers CONST_DOUBLE_LOW is the
1017 low-order word and ..._HIGH the high-order.
1018 For a float, there is a REAL_VALUE_TYPE structure, and
1019 CONST_DOUBLE_REAL_VALUE(r) is a pointer to it. */
1020 #define CONST_DOUBLE_LOW(r) XCWINT (r, 0, CONST_DOUBLE)
1021 #define CONST_DOUBLE_HIGH(r) XCWINT (r, 1, CONST_DOUBLE)
1022 #define CONST_DOUBLE_REAL_VALUE(r) ((struct real_value *)&CONST_DOUBLE_LOW(r))
1023
1024 /* For a CONST_VECTOR, return element #n. */
1025 #define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR)
1026
1027 /* For a CONST_VECTOR, return the number of elements in a vector. */
1028 #define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR)
1029
1030 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
1031 SUBREG_BYTE extracts the byte-number. */
1032
1033 #define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
1034 #define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
1035
1036 /* in rtlanal.c */
1037 extern unsigned int subreg_lsb PARAMS ((rtx));
1038 extern unsigned int subreg_regno_offset PARAMS ((unsigned int,
1039 enum machine_mode,
1040 unsigned int,
1041 enum machine_mode));
1042 extern bool subreg_offset_representable_p PARAMS ((unsigned int,
1043 enum machine_mode,
1044 unsigned int,
1045 enum machine_mode));
1046 extern unsigned int subreg_regno PARAMS ((rtx));
1047
1048 /* 1 if RTX is a subreg containing a reg that is already known to be
1049 sign- or zero-extended from the mode of the subreg to the mode of
1050 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
1051 extension.
1052
1053 When used as a LHS, is means that this extension must be done
1054 when assigning to SUBREG_REG. */
1055
1056 #define SUBREG_PROMOTED_VAR_P(RTX) \
1057 (RTL_FLAG_CHECK1("SUBREG_PROMOTED", (RTX), SUBREG)->in_struct)
1058
1059 #define SUBREG_PROMOTED_UNSIGNED_SET(RTX, VAL) \
1060 do { \
1061 rtx const _rtx = RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_SET", (RTX), SUBREG); \
1062 if ((VAL) < 0) \
1063 _rtx->volatil = 1; \
1064 else { \
1065 _rtx->volatil = 0; \
1066 _rtx->unchanging = (VAL); \
1067 } \
1068 } while (0)
1069 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) \
1070 ((RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil) \
1071 ? -1 : (RTX)->unchanging)
1072
1073 /* Access various components of an ASM_OPERANDS rtx. */
1074
1075 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)
1076 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS)
1077 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS)
1078 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS)
1079 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS)
1080 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS)
1081 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS)
1082 #define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
1083 XCVECEXP (RTX, 4, N, ASM_OPERANDS)
1084 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
1085 XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0)
1086 #define ASM_OPERANDS_INPUT_MODE(RTX, N) \
1087 GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS))
1088 #define ASM_OPERANDS_SOURCE_FILE(RTX) XCSTR (RTX, 5, ASM_OPERANDS)
1089 #define ASM_OPERANDS_SOURCE_LINE(RTX) XCINT (RTX, 6, ASM_OPERANDS)
1090
1091 /* 1 if RTX is a mem and we should keep the alias set for this mem
1092 unchanged when we access a component. Set to 1, or example, when we
1093 are already in a non-addressable component of an aggregate. */
1094 #define MEM_KEEP_ALIAS_SET_P(RTX) \
1095 (RTL_FLAG_CHECK1("MEM_KEEP_ALIAS_SET_P", (RTX), MEM)->jump)
1096
1097 /* 1 if RTX is a mem or asm_operand for a volatile reference. */
1098 #define MEM_VOLATILE_P(RTX) \
1099 (RTL_FLAG_CHECK3("MEM_VOLATILE_P", (RTX), MEM, ASM_OPERANDS, \
1100 ASM_INPUT)->volatil)
1101
1102 /* 1 if RTX is a mem that refers to an aggregate, either to the
1103 aggregate itself of to a field of the aggregate. If zero, RTX may
1104 or may not be such a reference. */
1105 #define MEM_IN_STRUCT_P(RTX) \
1106 (RTL_FLAG_CHECK1("MEM_IN_STRUCT_P", (RTX), MEM)->in_struct)
1107
1108 /* 1 if RTX is a mem that refers to a scalar. If zero, RTX may or may
1109 not refer to a scalar. */
1110 #define MEM_SCALAR_P(RTX) \
1111 (RTL_FLAG_CHECK1("MEM_SCALAR_P", (RTX), MEM)->frame_related)
1112
1113 /* 1 if RTX is a mem that cannot trap. */
1114 #define MEM_NOTRAP_P(RTX) \
1115 (RTL_FLAG_CHECK1("MEM_NOTRAP_P", (RTX), MEM)->call)
1116
1117 /* If VAL is nonzero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
1118 RTX. Otherwise, vice versa. Use this macro only when you are
1119 *sure* that you know that the MEM is in a structure, or is a
1120 scalar. VAL is evaluated only once. */
1121 #define MEM_SET_IN_STRUCT_P(RTX, VAL) \
1122 do { \
1123 if (VAL) \
1124 { \
1125 MEM_IN_STRUCT_P (RTX) = 1; \
1126 MEM_SCALAR_P (RTX) = 0; \
1127 } \
1128 else \
1129 { \
1130 MEM_IN_STRUCT_P (RTX) = 0; \
1131 MEM_SCALAR_P (RTX) = 1; \
1132 } \
1133 } while (0)
1134
1135 /* The memory attribute block. We provide access macros for each value
1136 in the block and provide defaults if none specified. */
1137 #define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
1138
1139 /* The register attribute block. We provide access macros for each value
1140 in the block and provide defaults if none specified. */
1141 #define REG_ATTRS(RTX) X0REGATTR (RTX, 2)
1142
1143 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
1144 set, and may alias anything. Otherwise, the MEM can only alias
1145 MEMs in a conflicting alias set. This value is set in a
1146 language-dependent manner in the front-end, and should not be
1147 altered in the back-end. These set numbers are tested with
1148 alias_sets_conflict_p. */
1149 #define MEM_ALIAS_SET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->alias)
1150
1151 /* For a MEM rtx, the decl it is known to refer to, if it is known to
1152 refer to part of a DECL. It may also be a COMPONENT_REF. */
1153 #define MEM_EXPR(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->expr)
1154
1155 /* For a MEM rtx, the offset from the start of MEM_EXPR, if known, as a
1156 RTX that is always a CONST_INT. */
1157 #define MEM_OFFSET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->offset)
1158
1159 /* For a MEM rtx, the size in bytes of the MEM, if known, as an RTX that
1160 is always a CONST_INT. */
1161 #define MEM_SIZE(RTX) \
1162 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->size \
1163 : GET_MODE (RTX) != BLKmode ? GEN_INT (GET_MODE_SIZE (GET_MODE (RTX))) \
1164 : 0)
1165
1166 /* For a MEM rtx, the alignment in bits. We can use the alignment of the
1167 mode as a default when STRICT_ALIGNMENT, but not if not. */
1168 #define MEM_ALIGN(RTX) \
1169 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->align \
1170 : (STRICT_ALIGNMENT && GET_MODE (RTX) != BLKmode \
1171 ? GET_MODE_ALIGNMENT (GET_MODE (RTX)) : BITS_PER_UNIT))
1172
1173 /* For a REG rtx, the decl it is known to refer to, if it is known to
1174 refer to part of a DECL. */
1175 #define REG_EXPR(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->decl)
1176
1177 /* For a MEM rtx, the offset from the start of MEM_DECL, if known, as a
1178 RTX that is always a CONST_INT. */
1179 #define REG_OFFSET(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->offset)
1180
1181 /* Copy the attributes that apply to memory locations from RHS to LHS. */
1182 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
1183 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
1184 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
1185 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
1186 MEM_NOTRAP_P (LHS) = MEM_NOTRAP_P (RHS), \
1187 RTX_UNCHANGING_P (LHS) = RTX_UNCHANGING_P (RHS), \
1188 MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \
1189 MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
1190
1191 /* 1 if RTX is a label_ref to a label outside the loop containing the
1192 reference. */
1193 #define LABEL_OUTSIDE_LOOP_P(RTX) \
1194 (RTL_FLAG_CHECK1("LABEL_OUTSIDE_LOOP_P", (RTX), LABEL_REF)->in_struct)
1195
1196 /* 1 if RTX is a label_ref for a nonlocal label. */
1197 /* Likewise in an expr_list for a reg_label note. */
1198 #define LABEL_REF_NONLOCAL_P(RTX) \
1199 (RTL_FLAG_CHECK2("LABEL_REF_NONLOCAL_P", (RTX), LABEL_REF, \
1200 REG_LABEL)->volatil)
1201
1202 /* 1 if RTX is a code_label that should always be considered to be needed. */
1203 #define LABEL_PRESERVE_P(RTX) \
1204 (RTL_FLAG_CHECK2("LABEL_PRESERVE_P", (RTX), CODE_LABEL, NOTE)->in_struct)
1205
1206 /* 1 if RTX is a reg that is used only in an exit test of a loop. */
1207 #define REG_LOOP_TEST_P(RTX) \
1208 (RTL_FLAG_CHECK1("REG_LOOP_TEST_P", (RTX), REG)->in_struct)
1209
1210 /* During sched, 1 if RTX is an insn that must be scheduled together
1211 with the preceding insn. */
1212 #define SCHED_GROUP_P(RTX) \
1213 (RTL_FLAG_CHECK3("SCHED_GROUP_P", (RTX), INSN, JUMP_INSN, CALL_INSN \
1214 )->in_struct)
1215
1216 /* For a SET rtx, SET_DEST is the place that is set
1217 and SET_SRC is the value it is set to. */
1218 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
1219 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
1220 #define SET_IS_RETURN_P(RTX) \
1221 (RTL_FLAG_CHECK1("SET_IS_RETURN_P", (RTX), SET)->jump)
1222
1223 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
1224 #define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
1225 #define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
1226
1227 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
1228 conditionally executing the code on, COND_EXEC_CODE is the code
1229 to execute if the condition is true. */
1230 #define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
1231 #define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
1232
1233 /* 1 if RTX is a symbol_ref that addresses this function's constants pool. */
1234 #define CONSTANT_POOL_ADDRESS_P(RTX) \
1235 (RTL_FLAG_CHECK1("CONSTANT_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->unchanging)
1236
1237 /* 1 if RTX is a symbol_ref that addresses this function's string constant
1238 pool */
1239 #define STRING_POOL_ADDRESS_P(RTX) \
1240 (RTL_FLAG_CHECK1("STRING_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->frame_related)
1241
1242 /* Used if RTX is a symbol_ref, for machine-specific purposes. */
1243 #define SYMBOL_REF_FLAG(RTX) \
1244 (RTL_FLAG_CHECK1("SYMBOL_REF_FLAG", (RTX), SYMBOL_REF)->volatil)
1245
1246 /* 1 if RTX is a symbol_ref that has been the library function in
1247 emit_library_call. */
1248 #define SYMBOL_REF_USED(RTX) \
1249 (RTL_FLAG_CHECK1("SYMBOL_REF_USED", (RTX), SYMBOL_REF)->used)
1250
1251 /* 1 if RTX is a symbol_ref for a weak symbol. */
1252 #define SYMBOL_REF_WEAK(RTX) \
1253 (RTL_FLAG_CHECK1("SYMBOL_REF_WEAK", (RTX), SYMBOL_REF)->integrated)
1254
1255 /* The tree (decl or constant) associated with the symbol, or null. */
1256 #define SYMBOL_REF_DECL(RTX) X0TREE ((RTX), 2)
1257
1258 /* A set of flags on a symbol_ref that are, in some respects, redundant with
1259 information derivable from the tree decl associated with this symbol.
1260 Except that we build a *lot* of SYMBOL_REFs that aren't associated with a
1261 decl. In some cases this is a bug. But beyond that, it's nice to cache
1262 this information to avoid recomputing it. Finally, this allows space for
1263 the target to store more than one bit of information, as with
1264 SYMBOL_REF_FLAG. */
1265 #define SYMBOL_REF_FLAGS(RTX) X0INT ((RTX), 1)
1266
1267 /* These flags are common enough to be defined for all targets. They
1268 are computed by the default version of targetm.encode_section_info. */
1269
1270 /* Set if this symbol is a function. */
1271 #define SYMBOL_FLAG_FUNCTION (1 << 0)
1272 #define SYMBOL_REF_FUNCTION_P(RTX) \
1273 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_FUNCTION) != 0)
1274 /* Set if targetm.binds_local_p is true. */
1275 #define SYMBOL_FLAG_LOCAL (1 << 1)
1276 #define SYMBOL_REF_LOCAL_P(RTX) \
1277 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_LOCAL) != 0)
1278 /* Set if targetm.in_small_data_p is true. */
1279 #define SYMBOL_FLAG_SMALL (1 << 2)
1280 #define SYMBOL_REF_SMALL_P(RTX) \
1281 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_SMALL) != 0)
1282 /* The three-bit field at [5:3] is true for TLS variables; use
1283 SYMBOL_REF_TLS_MODEL to extract the field as an enum tls_model. */
1284 #define SYMBOL_FLAG_TLS_SHIFT 3
1285 #define SYMBOL_REF_TLS_MODEL(RTX) \
1286 ((enum tls_model) ((SYMBOL_REF_FLAGS (RTX) >> SYMBOL_FLAG_TLS_SHIFT) & 7))
1287 /* Set if this symbol is not defined in this translation unit. */
1288 #define SYMBOL_FLAG_EXTERNAL (1 << 6)
1289 #define SYMBOL_REF_EXTERNAL_P(RTX) \
1290 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_EXTERNAL) != 0)
1291
1292 /* Subsequent bits are available for the target to use. */
1293 #define SYMBOL_FLAG_MACH_DEP_SHIFT 7
1294 #define SYMBOL_FLAG_MACH_DEP (1 << SYMBOL_FLAG_MACH_DEP_SHIFT)
1295
1296 /* Define a macro to look for REG_INC notes,
1297 but save time on machines where they never exist. */
1298
1299 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
1300 #define FIND_REG_INC_NOTE(INSN, REG) \
1301 ((REG) != NULL_RTX && REG_P ((REG)) \
1302 ? find_regno_note ((INSN), REG_INC, REGNO (REG)) \
1303 : find_reg_note ((INSN), REG_INC, (REG)))
1304 #else
1305 #define FIND_REG_INC_NOTE(INSN, REG) 0
1306 #endif
1307
1308 /* Indicate whether the machine has any sort of auto increment addressing.
1309 If not, we can avoid checking for REG_INC notes. */
1310
1311 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
1312 #define AUTO_INC_DEC
1313 #endif
1314
1315 #ifndef HAVE_PRE_INCREMENT
1316 #define HAVE_PRE_INCREMENT 0
1317 #endif
1318
1319 #ifndef HAVE_PRE_DECREMENT
1320 #define HAVE_PRE_DECREMENT 0
1321 #endif
1322
1323 #ifndef HAVE_POST_INCREMENT
1324 #define HAVE_POST_INCREMENT 0
1325 #endif
1326
1327 #ifndef HAVE_POST_DECREMENT
1328 #define HAVE_POST_DECREMENT 0
1329 #endif
1330
1331 #ifndef HAVE_POST_MODIFY_DISP
1332 #define HAVE_POST_MODIFY_DISP 0
1333 #endif
1334
1335 #ifndef HAVE_POST_MODIFY_REG
1336 #define HAVE_POST_MODIFY_REG 0
1337 #endif
1338
1339 #ifndef HAVE_PRE_MODIFY_DISP
1340 #define HAVE_PRE_MODIFY_DISP 0
1341 #endif
1342
1343 #ifndef HAVE_PRE_MODIFY_REG
1344 #define HAVE_PRE_MODIFY_REG 0
1345 #endif
1346
1347
1348 /* Some architectures do not have complete pre/post increment/decrement
1349 instruction sets, or only move some modes efficiently. These macros
1350 allow us to tune autoincrement generation. */
1351
1352 #ifndef USE_LOAD_POST_INCREMENT
1353 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1354 #endif
1355
1356 #ifndef USE_LOAD_POST_DECREMENT
1357 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1358 #endif
1359
1360 #ifndef USE_LOAD_PRE_INCREMENT
1361 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1362 #endif
1363
1364 #ifndef USE_LOAD_PRE_DECREMENT
1365 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1366 #endif
1367
1368 #ifndef USE_STORE_POST_INCREMENT
1369 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1370 #endif
1371
1372 #ifndef USE_STORE_POST_DECREMENT
1373 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1374 #endif
1375
1376 #ifndef USE_STORE_PRE_INCREMENT
1377 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1378 #endif
1379
1380 #ifndef USE_STORE_PRE_DECREMENT
1381 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1382 #endif
1383
1384 /* Determine if the insn is a PHI node. */
1385 #define PHI_NODE_P(X) \
1386 ((X) && GET_CODE (X) == INSN \
1387 && GET_CODE (PATTERN (X)) == SET \
1388 && GET_CODE (SET_SRC (PATTERN (X))) == PHI)
1389 \f
1390 /* Nonzero if we need to distinguish between the return value of this function
1391 and the return value of a function called by this function. This helps
1392 integrate.c.
1393 This is 1 until after the rtl generation pass. */
1394 extern int rtx_equal_function_value_matters;
1395
1396 /* Nonzero when we are generating CONCATs. */
1397 extern int generating_concat_p;
1398
1399 /* Generally useful functions. */
1400
1401 /* In expmed.c */
1402 extern int ceil_log2 PARAMS ((unsigned HOST_WIDE_INT));
1403
1404 #define plus_constant(X, C) plus_constant_wide ((X), (HOST_WIDE_INT) (C))
1405
1406 /* In builtins.c */
1407 extern rtx expand_builtin_expect_jump PARAMS ((tree, rtx, rtx));
1408 extern void purge_builtin_constant_p PARAMS ((void));
1409
1410 /* In explow.c */
1411 extern void set_stack_check_libfunc PARAMS ((rtx));
1412 extern HOST_WIDE_INT trunc_int_for_mode PARAMS ((HOST_WIDE_INT,
1413 enum machine_mode));
1414 extern rtx plus_constant_wide PARAMS ((rtx, HOST_WIDE_INT));
1415 extern rtx plus_constant_for_output_wide PARAMS ((rtx, HOST_WIDE_INT));
1416 extern void optimize_save_area_alloca PARAMS ((rtx));
1417
1418 /* In emit-rtl.c */
1419 extern rtx gen_rtx PARAMS ((enum rtx_code,
1420 enum machine_mode, ...));
1421 extern rtvec gen_rtvec PARAMS ((int, ...));
1422 extern rtx copy_insn_1 PARAMS ((rtx));
1423 extern rtx copy_insn PARAMS ((rtx));
1424 extern rtx gen_int_mode PARAMS ((HOST_WIDE_INT,
1425 enum machine_mode));
1426 extern rtx emit_copy_of_insn_after PARAMS ((rtx, rtx));
1427 extern void set_reg_attrs_from_mem PARAMS ((rtx, rtx));
1428 extern void set_mem_attrs_from_reg PARAMS ((rtx, rtx));
1429 extern void set_reg_attrs_for_parm PARAMS ((rtx, rtx));
1430
1431 /* In rtl.c */
1432 extern rtx rtx_alloc PARAMS ((RTX_CODE));
1433 extern rtvec rtvec_alloc PARAMS ((int));
1434 extern rtx copy_rtx PARAMS ((rtx));
1435
1436 /* In emit-rtl.c */
1437 extern rtx copy_rtx_if_shared PARAMS ((rtx));
1438
1439 /* In rtl.c */
1440 extern rtx copy_most_rtx PARAMS ((rtx, rtx));
1441 extern rtx shallow_copy_rtx PARAMS ((rtx));
1442 extern int rtx_equal_p PARAMS ((rtx, rtx));
1443
1444 /* In emit-rtl.c */
1445 extern rtvec gen_rtvec_v PARAMS ((int, rtx *));
1446 extern rtx gen_reg_rtx PARAMS ((enum machine_mode));
1447 extern rtx gen_rtx_REG_offset PARAMS ((rtx, enum machine_mode,
1448 unsigned int, int));
1449 extern rtx gen_label_rtx PARAMS ((void));
1450 extern int subreg_hard_regno PARAMS ((rtx, int));
1451 extern rtx gen_lowpart_common PARAMS ((enum machine_mode, rtx));
1452 extern rtx gen_lowpart PARAMS ((enum machine_mode, rtx));
1453
1454 /* In cse.c */
1455 extern rtx gen_lowpart_if_possible PARAMS ((enum machine_mode, rtx));
1456
1457 /* In emit-rtl.c */
1458 extern rtx gen_highpart PARAMS ((enum machine_mode, rtx));
1459 extern rtx gen_highpart_mode PARAMS ((enum machine_mode,
1460 enum machine_mode, rtx));
1461 extern rtx gen_realpart PARAMS ((enum machine_mode, rtx));
1462 extern rtx gen_imagpart PARAMS ((enum machine_mode, rtx));
1463 extern rtx operand_subword PARAMS ((rtx, unsigned int, int,
1464 enum machine_mode));
1465 extern rtx constant_subword PARAMS ((rtx, int,
1466 enum machine_mode));
1467
1468 /* In emit-rtl.c */
1469 extern rtx operand_subword_force PARAMS ((rtx, unsigned int,
1470 enum machine_mode));
1471 extern int subreg_lowpart_p PARAMS ((rtx));
1472 extern unsigned int subreg_lowpart_offset PARAMS ((enum machine_mode,
1473 enum machine_mode));
1474 extern unsigned int subreg_highpart_offset PARAMS ((enum machine_mode,
1475 enum machine_mode));
1476 extern rtx make_safe_from PARAMS ((rtx, rtx));
1477 extern rtx convert_memory_address PARAMS ((enum machine_mode, rtx));
1478 extern rtx get_insns PARAMS ((void));
1479 extern const char *get_insn_name PARAMS ((int));
1480 extern rtx get_last_insn PARAMS ((void));
1481 extern rtx get_last_insn_anywhere PARAMS ((void));
1482 extern rtx get_first_nonnote_insn PARAMS ((void));
1483 extern rtx get_last_nonnote_insn PARAMS ((void));
1484 extern void start_sequence PARAMS ((void));
1485 extern void push_to_sequence PARAMS ((rtx));
1486 extern void end_sequence PARAMS ((void));
1487 extern void push_to_full_sequence PARAMS ((rtx, rtx));
1488 extern void end_full_sequence PARAMS ((rtx*, rtx*));
1489
1490 /* In varasm.c */
1491 extern rtx immed_double_const PARAMS ((HOST_WIDE_INT, HOST_WIDE_INT, enum machine_mode));
1492 extern rtx mem_for_const_double PARAMS ((rtx));
1493 extern rtx force_const_mem PARAMS ((enum machine_mode, rtx));
1494
1495 /* In varasm.c */
1496 extern rtx get_pool_constant PARAMS ((rtx));
1497 extern rtx get_pool_constant_mark PARAMS ((rtx, bool *));
1498 extern enum machine_mode get_pool_mode PARAMS ((rtx));
1499 extern rtx get_pool_constant_for_function PARAMS ((struct function *, rtx));
1500 extern enum machine_mode get_pool_mode_for_function PARAMS ((struct function *, rtx));
1501 extern int get_pool_offset PARAMS ((rtx));
1502 extern rtx simplify_subtraction PARAMS ((rtx));
1503
1504 /* In function.c */
1505 extern rtx assign_stack_local PARAMS ((enum machine_mode,
1506 HOST_WIDE_INT, int));
1507 extern rtx assign_stack_temp PARAMS ((enum machine_mode,
1508 HOST_WIDE_INT, int));
1509 extern rtx assign_stack_temp_for_type PARAMS ((enum machine_mode,
1510 HOST_WIDE_INT, int, tree));
1511 extern rtx assign_temp PARAMS ((tree, int, int, int));
1512 /* In emit-rtl.c */
1513 extern rtx emit_insn_before PARAMS ((rtx, rtx));
1514 extern rtx emit_insn_before_scope PARAMS ((rtx, rtx, tree));
1515 extern rtx emit_jump_insn_before PARAMS ((rtx, rtx));
1516 extern rtx emit_jump_insn_before_scope PARAMS ((rtx, rtx, tree));
1517 extern rtx emit_call_insn_before PARAMS ((rtx, rtx));
1518 extern rtx emit_call_insn_before_scope PARAMS ((rtx, rtx, tree));
1519 extern rtx emit_barrier_before PARAMS ((rtx));
1520 extern rtx emit_label_before PARAMS ((rtx, rtx));
1521 extern rtx emit_note_before PARAMS ((int, rtx));
1522 extern rtx emit_insn_after PARAMS ((rtx, rtx));
1523 extern rtx emit_insn_after_scope PARAMS ((rtx, rtx, tree));
1524 extern rtx emit_jump_insn_after PARAMS ((rtx, rtx));
1525 extern rtx emit_jump_insn_after_scope PARAMS ((rtx, rtx, tree));
1526 extern rtx emit_call_insn_after PARAMS ((rtx, rtx));
1527 extern rtx emit_call_insn_after_scope PARAMS ((rtx, rtx, tree));
1528 extern rtx emit_barrier_after PARAMS ((rtx));
1529 extern rtx emit_label_after PARAMS ((rtx, rtx));
1530 extern rtx emit_note_after PARAMS ((int, rtx));
1531 extern rtx emit_line_note_after PARAMS ((const char *, int, rtx));
1532 extern rtx emit_insn PARAMS ((rtx));
1533 extern rtx emit_jump_insn PARAMS ((rtx));
1534 extern rtx emit_call_insn PARAMS ((rtx));
1535 extern rtx emit_label PARAMS ((rtx));
1536 extern rtx emit_barrier PARAMS ((void));
1537 extern rtx emit_line_note PARAMS ((const char *, int));
1538 extern rtx emit_note PARAMS ((const char *, int));
1539 extern rtx emit_line_note_force PARAMS ((const char *, int));
1540 extern rtx make_insn_raw PARAMS ((rtx));
1541 extern rtx previous_insn PARAMS ((rtx));
1542 extern rtx next_insn PARAMS ((rtx));
1543 extern rtx prev_nonnote_insn PARAMS ((rtx));
1544 extern rtx next_nonnote_insn PARAMS ((rtx));
1545 extern rtx prev_real_insn PARAMS ((rtx));
1546 extern rtx next_real_insn PARAMS ((rtx));
1547 extern rtx prev_active_insn PARAMS ((rtx));
1548 extern rtx next_active_insn PARAMS ((rtx));
1549 extern int active_insn_p PARAMS ((rtx));
1550 extern rtx prev_label PARAMS ((rtx));
1551 extern rtx next_label PARAMS ((rtx));
1552 extern rtx next_cc0_user PARAMS ((rtx));
1553 extern rtx prev_cc0_setter PARAMS ((rtx));
1554
1555 /* In cfglayout.c */
1556 extern tree choose_inner_scope PARAMS ((tree, tree));
1557
1558 /* In jump.c */
1559 extern rtx next_nondeleted_insn PARAMS ((rtx));
1560 extern enum rtx_code reverse_condition PARAMS ((enum rtx_code));
1561 extern enum rtx_code reverse_condition_maybe_unordered PARAMS ((enum rtx_code));
1562 extern enum rtx_code swap_condition PARAMS ((enum rtx_code));
1563 extern enum rtx_code unsigned_condition PARAMS ((enum rtx_code));
1564 extern enum rtx_code signed_condition PARAMS ((enum rtx_code));
1565 extern void mark_jump_label PARAMS ((rtx, rtx, int));
1566 extern void cleanup_barriers PARAMS ((void));
1567
1568 /* In jump.c */
1569 extern bool squeeze_notes PARAMS ((rtx *, rtx *));
1570 extern rtx delete_related_insns PARAMS ((rtx));
1571 extern void delete_jump PARAMS ((rtx));
1572 extern void delete_barrier PARAMS ((rtx));
1573 extern rtx get_label_before PARAMS ((rtx));
1574 extern rtx get_label_after PARAMS ((rtx));
1575 extern rtx follow_jumps PARAMS ((rtx));
1576
1577 /* In recog.c */
1578 extern rtx *find_constant_term_loc PARAMS ((rtx *));
1579
1580 /* In emit-rtl.c */
1581 extern rtx try_split PARAMS ((rtx, rtx, int));
1582 extern int split_branch_probability;
1583
1584 /* In unknown file */
1585 extern rtx split_insns PARAMS ((rtx, rtx));
1586
1587 /* In simplify-rtx.c */
1588 extern rtx simplify_unary_operation PARAMS ((enum rtx_code,
1589 enum machine_mode, rtx,
1590 enum machine_mode));
1591 extern rtx simplify_binary_operation PARAMS ((enum rtx_code,
1592 enum machine_mode, rtx,
1593 rtx));
1594 extern rtx simplify_ternary_operation PARAMS ((enum rtx_code,
1595 enum machine_mode,
1596 enum machine_mode, rtx, rtx,
1597 rtx));
1598 extern rtx simplify_relational_operation PARAMS ((enum rtx_code,
1599 enum machine_mode, rtx,
1600 rtx));
1601 extern rtx simplify_gen_binary PARAMS ((enum rtx_code,
1602 enum machine_mode,
1603 rtx, rtx));
1604 extern rtx simplify_gen_unary PARAMS ((enum rtx_code,
1605 enum machine_mode, rtx,
1606 enum machine_mode));
1607 extern rtx simplify_gen_ternary PARAMS ((enum rtx_code,
1608 enum machine_mode,
1609 enum machine_mode,
1610 rtx, rtx, rtx));
1611 extern rtx simplify_gen_relational PARAMS ((enum rtx_code,
1612 enum machine_mode,
1613 enum machine_mode,
1614 rtx, rtx));
1615 extern rtx simplify_subreg PARAMS ((enum machine_mode,
1616 rtx,
1617 enum machine_mode,
1618 unsigned int));
1619 extern rtx simplify_gen_subreg PARAMS ((enum machine_mode,
1620 rtx,
1621 enum machine_mode,
1622 unsigned int));
1623 extern rtx simplify_replace_rtx PARAMS ((rtx, rtx, rtx));
1624 extern rtx simplify_rtx PARAMS ((rtx));
1625 extern rtx avoid_constant_pool_reference PARAMS ((rtx));
1626
1627 /* In function.c */
1628 extern rtx gen_mem_addressof PARAMS ((rtx, tree, int));
1629
1630 /* In regclass.c */
1631 extern enum machine_mode choose_hard_reg_mode PARAMS ((unsigned int,
1632 unsigned int));
1633
1634 /* In emit-rtl.c */
1635 extern rtx set_unique_reg_note PARAMS ((rtx, enum reg_note, rtx));
1636
1637 /* Functions in rtlanal.c */
1638
1639 /* Single set is implemented as macro for performance reasons. */
1640 #define single_set(I) (INSN_P (I) \
1641 ? (GET_CODE (PATTERN (I)) == SET \
1642 ? PATTERN (I) : single_set_1 (I)) \
1643 : NULL_RTX)
1644 #define single_set_1(I) single_set_2 (I, PATTERN (I))
1645
1646 /* Structure used for passing data to REPLACE_LABEL. */
1647 typedef struct replace_label_data
1648 {
1649 rtx r1;
1650 rtx r2;
1651 bool update_label_nuses;
1652 } replace_label_data;
1653
1654 extern int rtx_addr_can_trap_p PARAMS ((rtx));
1655 extern bool nonzero_address_p PARAMS ((rtx));
1656 extern int rtx_unstable_p PARAMS ((rtx));
1657 extern int rtx_varies_p PARAMS ((rtx, int));
1658 extern int rtx_addr_varies_p PARAMS ((rtx, int));
1659 extern HOST_WIDE_INT get_integer_term PARAMS ((rtx));
1660 extern rtx get_related_value PARAMS ((rtx));
1661 extern rtx get_jump_table_offset PARAMS ((rtx, rtx *));
1662 extern int global_reg_mentioned_p PARAMS ((rtx));
1663 extern int reg_mentioned_p PARAMS ((rtx, rtx));
1664 extern int count_occurrences PARAMS ((rtx, rtx, int));
1665 extern int reg_referenced_p PARAMS ((rtx, rtx));
1666 extern int reg_used_between_p PARAMS ((rtx, rtx, rtx));
1667 extern int reg_referenced_between_p PARAMS ((rtx, rtx, rtx));
1668 extern int reg_set_between_p PARAMS ((rtx, rtx, rtx));
1669 extern int regs_set_between_p PARAMS ((rtx, rtx, rtx));
1670 extern int commutative_operand_precedence PARAMS ((rtx));
1671 extern int swap_commutative_operands_p PARAMS ((rtx, rtx));
1672 extern int modified_between_p PARAMS ((rtx, rtx, rtx));
1673 extern int no_labels_between_p PARAMS ((rtx, rtx));
1674 extern int no_jumps_between_p PARAMS ((rtx, rtx));
1675 extern int modified_in_p PARAMS ((rtx, rtx));
1676 extern int insn_dependent_p PARAMS ((rtx, rtx));
1677 extern int reg_set_p PARAMS ((rtx, rtx));
1678 extern rtx single_set_2 PARAMS ((rtx, rtx));
1679 extern int multiple_sets PARAMS ((rtx));
1680 extern int set_noop_p PARAMS ((rtx));
1681 extern int noop_move_p PARAMS ((rtx));
1682 extern rtx find_last_value PARAMS ((rtx, rtx *, rtx, int));
1683 extern int refers_to_regno_p PARAMS ((unsigned int, unsigned int,
1684 rtx, rtx *));
1685 extern int reg_overlap_mentioned_p PARAMS ((rtx, rtx));
1686 extern rtx set_of PARAMS ((rtx, rtx));
1687 extern void note_stores PARAMS ((rtx,
1688 void (*) (rtx, rtx, void *),
1689 void *));
1690 extern void note_uses PARAMS ((rtx *,
1691 void (*) (rtx *, void *),
1692 void *));
1693 extern rtx reg_set_last PARAMS ((rtx, rtx));
1694 extern int dead_or_set_p PARAMS ((rtx, rtx));
1695 extern int dead_or_set_regno_p PARAMS ((rtx, unsigned int));
1696 extern rtx find_reg_note PARAMS ((rtx, enum reg_note, rtx));
1697 extern rtx find_regno_note PARAMS ((rtx, enum reg_note,
1698 unsigned int));
1699 extern rtx find_reg_equal_equiv_note PARAMS ((rtx));
1700 extern int find_reg_fusage PARAMS ((rtx, enum rtx_code, rtx));
1701 extern int find_regno_fusage PARAMS ((rtx, enum rtx_code,
1702 unsigned int));
1703 extern int pure_call_p PARAMS ((rtx));
1704 extern void remove_note PARAMS ((rtx, rtx));
1705 extern int side_effects_p PARAMS ((rtx));
1706 extern int volatile_refs_p PARAMS ((rtx));
1707 extern int volatile_insn_p PARAMS ((rtx));
1708 extern int may_trap_p PARAMS ((rtx));
1709 extern int inequality_comparisons_p PARAMS ((rtx));
1710 extern rtx replace_rtx PARAMS ((rtx, rtx, rtx));
1711 extern rtx replace_regs PARAMS ((rtx, rtx *, unsigned int,
1712 int));
1713 extern int replace_label PARAMS ((rtx *, void *));
1714 extern int rtx_referenced_p PARAMS ((rtx, rtx));
1715 extern bool tablejump_p PARAMS ((rtx, rtx *, rtx *));
1716 extern int computed_jump_p PARAMS ((rtx));
1717 typedef int (*rtx_function) PARAMS ((rtx *, void *));
1718 extern int for_each_rtx PARAMS ((rtx *, rtx_function, void *));
1719 extern rtx regno_use_in PARAMS ((unsigned int, rtx));
1720 extern int auto_inc_p PARAMS ((rtx));
1721 extern int in_expr_list_p PARAMS ((rtx, rtx));
1722 extern void remove_node_from_expr_list PARAMS ((rtx, rtx *));
1723 extern int insns_safe_to_move_p PARAMS ((rtx, rtx, rtx *));
1724 extern int loc_mentioned_in_p PARAMS ((rtx *, rtx));
1725 extern rtx find_first_parameter_load PARAMS ((rtx, rtx));
1726 extern bool keep_with_call_p PARAMS ((rtx));
1727
1728 /* flow.c */
1729
1730 extern rtx find_use_as_address PARAMS ((rtx, rtx, HOST_WIDE_INT));
1731
1732 /* lists.c */
1733
1734 void free_EXPR_LIST_list PARAMS ((rtx *));
1735 void free_INSN_LIST_list PARAMS ((rtx *));
1736 void free_EXPR_LIST_node PARAMS ((rtx));
1737 void free_INSN_LIST_node PARAMS ((rtx));
1738 rtx alloc_INSN_LIST PARAMS ((rtx, rtx));
1739 rtx alloc_EXPR_LIST PARAMS ((int, rtx, rtx));
1740
1741 /* regclass.c */
1742
1743 /* Maximum number of parallel sets and clobbers in any insn in this fn.
1744 Always at least 3, since the combiner could put that many togetherm
1745 and we want this to remain correct for all the remaining passes. */
1746
1747 extern int max_parallel;
1748
1749 /* Free up register info memory. */
1750 extern void free_reg_info PARAMS ((void));
1751
1752 /* recog.c */
1753 extern int asm_noperands PARAMS ((rtx));
1754 extern const char *decode_asm_operands PARAMS ((rtx, rtx *, rtx **,
1755 const char **,
1756 enum machine_mode *));
1757
1758 extern enum reg_class reg_preferred_class PARAMS ((int));
1759 extern enum reg_class reg_alternate_class PARAMS ((int));
1760
1761 extern rtx get_first_nonparm_insn PARAMS ((void));
1762
1763 extern void split_all_insns PARAMS ((int));
1764 extern void split_all_insns_noflow PARAMS ((void));
1765
1766 #define MAX_SAVED_CONST_INT 64
1767 extern GTY(()) rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
1768
1769 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
1770 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
1771 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
1772 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
1773 extern GTY(()) rtx const_true_rtx;
1774
1775 extern GTY(()) rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
1776
1777 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
1778 same as VOIDmode. */
1779
1780 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1781
1782 /* Likewise, for the constants 1 and 2. */
1783
1784 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1785 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
1786
1787 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1788 is used to represent the frame pointer. This is because the
1789 hard frame pointer and the automatic variables are separated by an amount
1790 that cannot be determined until after register allocation. We can assume
1791 that in this case ELIMINABLE_REGS will be defined, one action of which
1792 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1793 #ifndef HARD_FRAME_POINTER_REGNUM
1794 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1795 #endif
1796
1797 /* Index labels for global_rtl. */
1798 enum global_rtl_index
1799 {
1800 GR_PC,
1801 GR_CC0,
1802 GR_STACK_POINTER,
1803 GR_FRAME_POINTER,
1804 /* For register elimination to work properly these hard_frame_pointer_rtx,
1805 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1806 the same register. */
1807 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1808 GR_ARG_POINTER = GR_FRAME_POINTER,
1809 #endif
1810 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1811 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
1812 #else
1813 GR_HARD_FRAME_POINTER,
1814 #endif
1815 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
1816 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1817 GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
1818 #else
1819 GR_ARG_POINTER,
1820 #endif
1821 #endif
1822 GR_VIRTUAL_INCOMING_ARGS,
1823 GR_VIRTUAL_STACK_ARGS,
1824 GR_VIRTUAL_STACK_DYNAMIC,
1825 GR_VIRTUAL_OUTGOING_ARGS,
1826 GR_VIRTUAL_CFA,
1827
1828 GR_MAX
1829 };
1830
1831 /* Pointers to standard pieces of rtx are stored here. */
1832 extern GTY(()) rtx global_rtl[GR_MAX];
1833
1834 /* Standard pieces of rtx, to be substituted directly into things. */
1835 #define pc_rtx (global_rtl[GR_PC])
1836 #define cc0_rtx (global_rtl[GR_CC0])
1837
1838 /* All references to certain hard regs, except those created
1839 by allocating pseudo regs into them (when that's possible),
1840 go through these unique rtx objects. */
1841 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
1842 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
1843 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
1844 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
1845
1846 extern GTY(()) rtx pic_offset_table_rtx;
1847 extern GTY(()) rtx struct_value_rtx;
1848 extern GTY(()) rtx struct_value_incoming_rtx;
1849 extern GTY(()) rtx static_chain_rtx;
1850 extern GTY(()) rtx static_chain_incoming_rtx;
1851 extern GTY(()) rtx return_address_pointer_rtx;
1852
1853 /* Include the RTL generation functions. */
1854
1855 #ifndef NO_GENRTL_H
1856 #include "genrtl.h"
1857 #endif
1858
1859 /* There are some RTL codes that require special attention; the
1860 generation functions included above do the raw handling. If you
1861 add to this list, modify special_rtx in gengenrtl.c as well. You
1862 should also modify gen_rtx to use the special function. */
1863
1864 extern rtx gen_rtx_CONST_INT PARAMS ((enum machine_mode, HOST_WIDE_INT));
1865 extern rtx gen_rtx_CONST_VECTOR PARAMS ((enum machine_mode, rtvec));
1866 extern rtx gen_raw_REG PARAMS ((enum machine_mode, int));
1867 extern rtx gen_rtx_REG PARAMS ((enum machine_mode, unsigned));
1868 extern rtx gen_rtx_SUBREG PARAMS ((enum machine_mode, rtx, int));
1869 extern rtx gen_rtx_MEM PARAMS ((enum machine_mode, rtx));
1870
1871 extern rtx gen_lowpart_SUBREG PARAMS ((enum machine_mode, rtx));
1872
1873 /* We need the cast here to ensure that we get the same result both with
1874 and without prototypes. */
1875 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (HOST_WIDE_INT) (N))
1876
1877 /* Virtual registers are used during RTL generation to refer to locations into
1878 the stack frame when the actual location isn't known until RTL generation
1879 is complete. The routine instantiate_virtual_regs replaces these with
1880 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
1881 a constant. */
1882
1883 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
1884
1885 /* This points to the first word of the incoming arguments passed on the stack,
1886 either by the caller or by the callee when pretending it was passed by the
1887 caller. */
1888
1889 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
1890
1891 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
1892
1893 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
1894 variable on the stack. Otherwise, it points to the first variable on
1895 the stack. */
1896
1897 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
1898
1899 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
1900
1901 /* This points to the location of dynamically-allocated memory on the stack
1902 immediately after the stack pointer has been adjusted by the amount
1903 desired. */
1904
1905 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
1906
1907 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
1908
1909 /* This points to the location in the stack at which outgoing arguments should
1910 be written when the stack is pre-pushed (arguments pushed using push
1911 insns always use sp). */
1912
1913 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
1914
1915 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
1916
1917 /* This points to the Canonical Frame Address of the function. This
1918 should correspond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
1919 but is calculated relative to the arg pointer for simplicity; the
1920 frame pointer nor stack pointer are necessarily fixed relative to
1921 the CFA until after reload. */
1922
1923 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
1924
1925 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
1926
1927 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
1928
1929 /* Nonzero if REGNUM is a pointer into the stack frame. */
1930 #define REGNO_PTR_FRAME_P(REGNUM) \
1931 ((REGNUM) == STACK_POINTER_REGNUM \
1932 || (REGNUM) == FRAME_POINTER_REGNUM \
1933 || (REGNUM) == HARD_FRAME_POINTER_REGNUM \
1934 || (REGNUM) == ARG_POINTER_REGNUM \
1935 || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \
1936 && (REGNUM) <= LAST_VIRTUAL_REGISTER))
1937
1938 /* REGNUM never really appearing in the INSN stream. */
1939 #define INVALID_REGNUM (~(unsigned int) 0)
1940
1941 extern rtx find_next_ref PARAMS ((rtx, rtx));
1942
1943 extern rtx output_constant_def PARAMS ((tree, int));
1944
1945 /* Define a default value for STORE_FLAG_VALUE. */
1946
1947 #ifndef STORE_FLAG_VALUE
1948 #define STORE_FLAG_VALUE 1
1949 #endif
1950
1951 /* Nonzero after the second flow pass has completed.
1952 Set to 1 or 0 by toplev.c */
1953 extern int flow2_completed;
1954
1955 /* Nonzero after end of reload pass.
1956 Set to 1 or 0 by reload1.c. */
1957
1958 extern int reload_completed;
1959
1960 /* Set to 1 while reload_as_needed is operating.
1961 Required by some machines to handle any generated moves differently. */
1962
1963 extern int reload_in_progress;
1964
1965 /* If this is nonzero, we do not bother generating VOLATILE
1966 around volatile memory references, and we are willing to
1967 output indirect addresses. If cse is to follow, we reject
1968 indirect addresses so a useful potential cse is generated;
1969 if it is used only once, instruction combination will produce
1970 the same indirect address eventually. */
1971 extern int cse_not_expected;
1972
1973 /* Set to nonzero before life analysis to indicate that it is unsafe to
1974 generate any new pseudo registers. */
1975 extern int no_new_pseudos;
1976
1977 /* Translates rtx code to tree code, for those codes needed by
1978 REAL_ARITHMETIC. The function returns an int because the caller may not
1979 know what `enum tree_code' means. */
1980
1981 extern int rtx_to_tree_code PARAMS ((enum rtx_code));
1982
1983 /* In cse.c */
1984 struct cse_basic_block_data;
1985
1986 /* Return the right cost to give to an operation
1987 to make the cost of the corresponding register-to-register instruction
1988 N times that of a fast register-to-register instruction. */
1989 #define COSTS_N_INSNS(N) ((N) * 4)
1990
1991 /* Maximum cost of a rtl expression. This value has the special meaning
1992 not to use an rtx with this cost under any circumstances. */
1993 #define MAX_COST INT_MAX
1994
1995 extern int rtx_cost PARAMS ((rtx, enum rtx_code));
1996 extern int address_cost PARAMS ((rtx, enum machine_mode));
1997 extern int delete_trivially_dead_insns PARAMS ((rtx, int));
1998 #ifdef BUFSIZ
1999 extern int cse_main PARAMS ((rtx, int, int, FILE *));
2000 #endif
2001 extern void cse_end_of_basic_block PARAMS ((rtx,
2002 struct cse_basic_block_data *,
2003 int, int, int));
2004
2005 /* In jump.c */
2006 extern int comparison_dominates_p PARAMS ((enum rtx_code, enum rtx_code));
2007 extern int condjump_p PARAMS ((rtx));
2008 extern int any_condjump_p PARAMS ((rtx));
2009 extern int any_uncondjump_p PARAMS ((rtx));
2010 extern int safe_to_remove_jump_p PARAMS ((rtx));
2011 extern rtx pc_set PARAMS ((rtx));
2012 extern rtx condjump_label PARAMS ((rtx));
2013 extern int simplejump_p PARAMS ((rtx));
2014 extern int returnjump_p PARAMS ((rtx));
2015 extern int onlyjump_p PARAMS ((rtx));
2016 extern int only_sets_cc0_p PARAMS ((rtx));
2017 extern int sets_cc0_p PARAMS ((rtx));
2018 extern int invert_jump_1 PARAMS ((rtx, rtx));
2019 extern int invert_jump PARAMS ((rtx, rtx, int));
2020 extern int rtx_renumbered_equal_p PARAMS ((rtx, rtx));
2021 extern int true_regnum PARAMS ((rtx));
2022 extern unsigned int reg_or_subregno PARAMS ((rtx));
2023 extern int redirect_jump_1 PARAMS ((rtx, rtx));
2024 extern int redirect_jump PARAMS ((rtx, rtx, int));
2025 extern void rebuild_jump_labels PARAMS ((rtx));
2026 extern enum rtx_code reversed_comparison_code PARAMS ((rtx, rtx));
2027 extern enum rtx_code reversed_comparison_code_parts PARAMS ((enum rtx_code,
2028 rtx, rtx, rtx));
2029 extern void delete_for_peephole PARAMS ((rtx, rtx));
2030 extern int condjump_in_parallel_p PARAMS ((rtx));
2031 extern void never_reached_warning PARAMS ((rtx, rtx));
2032 extern void purge_line_number_notes PARAMS ((rtx));
2033 extern void copy_loop_headers PARAMS ((rtx));
2034
2035 /* In emit-rtl.c. */
2036 extern int max_reg_num PARAMS ((void));
2037 extern int max_label_num PARAMS ((void));
2038 extern int get_first_label_num PARAMS ((void));
2039 extern void delete_insns_since PARAMS ((rtx));
2040 extern void mark_reg_pointer PARAMS ((rtx, int));
2041 extern void mark_user_reg PARAMS ((rtx));
2042 extern void reset_used_flags PARAMS ((rtx));
2043 extern void reorder_insns PARAMS ((rtx, rtx, rtx));
2044 extern void reorder_insns_nobb PARAMS ((rtx, rtx, rtx));
2045 extern int get_max_uid PARAMS ((void));
2046 extern int in_sequence_p PARAMS ((void));
2047 extern void force_next_line_note PARAMS ((void));
2048 extern void init_emit PARAMS ((void));
2049 extern void init_emit_once PARAMS ((int));
2050 extern void push_topmost_sequence PARAMS ((void));
2051 extern void pop_topmost_sequence PARAMS ((void));
2052 extern int subreg_realpart_p PARAMS ((rtx));
2053 extern void reverse_comparison PARAMS ((rtx));
2054 extern void set_new_first_and_last_insn PARAMS ((rtx, rtx));
2055 extern void set_new_first_and_last_label_num PARAMS ((int, int));
2056 extern void set_new_last_label_num PARAMS ((int));
2057 extern void unshare_all_rtl_again PARAMS ((rtx));
2058 extern void set_first_insn PARAMS ((rtx));
2059 extern void set_last_insn PARAMS ((rtx));
2060 extern void link_cc0_insns PARAMS ((rtx));
2061 extern void add_insn PARAMS ((rtx));
2062 extern void add_insn_before PARAMS ((rtx, rtx));
2063 extern void add_insn_after PARAMS ((rtx, rtx));
2064 extern void remove_insn PARAMS ((rtx));
2065 extern void reorder_insns_with_line_notes PARAMS ((rtx, rtx, rtx));
2066 extern void emit_insn_after_with_line_notes PARAMS ((rtx, rtx, rtx));
2067 extern enum rtx_code classify_insn PARAMS ((rtx));
2068 extern rtx emit PARAMS ((rtx));
2069 /* Query and clear/ restore no_line_numbers. This is used by the
2070 switch / case handling in stmt.c to give proper line numbers in
2071 warnings about unreachable code. */
2072 int force_line_numbers PARAMS ((void));
2073 void restore_line_number_status PARAMS ((int old_value));
2074 extern void renumber_insns PARAMS ((FILE *));
2075 extern void remove_unnecessary_notes PARAMS ((void));
2076 extern rtx delete_insn PARAMS ((rtx));
2077 extern void delete_insn_chain PARAMS ((rtx, rtx));
2078 extern rtx delete_insn_and_edges PARAMS ((rtx));
2079 extern void delete_insn_chain_and_edges PARAMS ((rtx, rtx));
2080
2081 /* In combine.c */
2082 extern int combine_instructions PARAMS ((rtx, unsigned int));
2083 extern unsigned int extended_count PARAMS ((rtx, enum machine_mode, int));
2084 extern rtx remove_death PARAMS ((unsigned int, rtx));
2085 #ifdef BUFSIZ
2086 extern void dump_combine_stats PARAMS ((FILE *));
2087 extern void dump_combine_total_stats PARAMS ((FILE *));
2088 #endif
2089
2090 /* In sched.c. */
2091 #ifdef BUFSIZ
2092 extern void schedule_insns PARAMS ((FILE *));
2093 extern void schedule_ebbs PARAMS ((FILE *));
2094 #endif
2095 extern void fix_sched_param PARAMS ((const char *, const char *));
2096
2097 /* In print-rtl.c */
2098 extern const char *print_rtx_head;
2099 extern void debug_rtx PARAMS ((rtx));
2100 extern void debug_rtx_list PARAMS ((rtx, int));
2101 extern void debug_rtx_range PARAMS ((rtx, rtx));
2102 extern rtx debug_rtx_find PARAMS ((rtx, int));
2103 #ifdef BUFSIZ
2104 extern void print_mem_expr PARAMS ((FILE *, tree));
2105 extern void print_rtl PARAMS ((FILE *, rtx));
2106 extern void print_simple_rtl PARAMS ((FILE *, rtx));
2107 extern int print_rtl_single PARAMS ((FILE *, rtx));
2108 extern void print_inline_rtx PARAMS ((FILE *, rtx, int));
2109 #endif
2110
2111 /* In loop.c */
2112 extern void init_loop PARAMS ((void));
2113 extern rtx libcall_other_reg PARAMS ((rtx, rtx));
2114 #ifdef BUFSIZ
2115 extern void loop_optimize PARAMS ((rtx, FILE *, int));
2116 #endif
2117 extern void record_excess_regs PARAMS ((rtx, rtx, rtx *));
2118
2119 /* In function.c */
2120 extern void reposition_prologue_and_epilogue_notes PARAMS ((rtx));
2121 extern void thread_prologue_and_epilogue_insns PARAMS ((rtx));
2122 extern int prologue_epilogue_contains PARAMS ((rtx));
2123 extern int sibcall_epilogue_contains PARAMS ((rtx));
2124 extern void preserve_rtl_expr_result PARAMS ((rtx));
2125 extern void mark_temp_addr_taken PARAMS ((rtx));
2126 extern void update_temp_slot_address PARAMS ((rtx, rtx));
2127 extern void purge_addressof PARAMS ((rtx));
2128 extern void purge_hard_subreg_sets PARAMS ((rtx));
2129
2130 /* In stmt.c */
2131 extern void set_file_and_line_for_stmt PARAMS ((const char *, int));
2132 extern void expand_null_return PARAMS ((void));
2133 extern void emit_jump PARAMS ((rtx));
2134 extern int preserve_subexpressions_p PARAMS ((void));
2135
2136 /* In expr.c */
2137 extern void move_by_pieces PARAMS ((rtx, rtx,
2138 unsigned HOST_WIDE_INT,
2139 unsigned int));
2140
2141 /* In flow.c */
2142 extern void recompute_reg_usage PARAMS ((rtx, int));
2143 extern int initialize_uninitialized_subregs PARAMS ((void));
2144 extern void delete_dead_jumptables PARAMS ((void));
2145 #ifdef BUFSIZ
2146 extern void print_rtl_with_bb PARAMS ((FILE *, rtx));
2147 extern void dump_flow_info PARAMS ((FILE *));
2148 #endif
2149
2150 /* In expmed.c */
2151 extern void init_expmed PARAMS ((void));
2152 extern void expand_inc PARAMS ((rtx, rtx));
2153 extern void expand_dec PARAMS ((rtx, rtx));
2154 extern rtx expand_mult_highpart PARAMS ((enum machine_mode, rtx,
2155 unsigned HOST_WIDE_INT, rtx,
2156 int, int));
2157
2158 /* In gcse.c */
2159 extern bool can_copy_p PARAMS ((enum machine_mode));
2160 #ifdef BUFSIZ
2161 extern int gcse_main PARAMS ((rtx, FILE *));
2162 extern int bypass_jumps PARAMS ((FILE *));
2163 #endif
2164
2165 /* In global.c */
2166 extern void mark_elimination PARAMS ((int, int));
2167 #ifdef BUFSIZ
2168 extern int global_alloc PARAMS ((FILE *));
2169 extern void dump_global_regs PARAMS ((FILE *));
2170 #endif
2171 #ifdef HARD_CONST
2172 /* Yes, this ifdef is silly, but HARD_REG_SET is not always defined. */
2173 extern void retry_global_alloc PARAMS ((int, HARD_REG_SET));
2174 #endif
2175 extern void build_insn_chain PARAMS ((rtx));
2176
2177 /* In regclass.c */
2178 extern int reg_classes_intersect_p PARAMS ((enum reg_class, enum reg_class));
2179 extern int reg_class_subset_p PARAMS ((enum reg_class, enum reg_class));
2180 extern void globalize_reg PARAMS ((int));
2181 extern void init_regs PARAMS ((void));
2182 extern void init_fake_stack_mems PARAMS ((void));
2183 extern void init_reg_sets PARAMS ((void));
2184 extern void regset_release_memory PARAMS ((void));
2185 extern void regclass_init PARAMS ((void));
2186 extern void regclass PARAMS ((rtx, int, FILE *));
2187 extern void reg_scan PARAMS ((rtx, unsigned int, int));
2188 extern void reg_scan_update PARAMS ((rtx, rtx, unsigned int));
2189 extern void fix_register PARAMS ((const char *, int, int));
2190 #ifdef HARD_CONST
2191 extern void cannot_change_mode_set_regs PARAMS ((HARD_REG_SET *,
2192 enum machine_mode,
2193 unsigned int));
2194 #endif
2195 extern bool invalid_mode_change_p PARAMS ((unsigned int,
2196 enum reg_class,
2197 enum machine_mode));
2198
2199 extern int delete_null_pointer_checks PARAMS ((rtx));
2200
2201 /* In regmove.c */
2202 #ifdef BUFSIZ
2203 extern void regmove_optimize PARAMS ((rtx, int, FILE *));
2204 #endif
2205 extern void combine_stack_adjustments PARAMS ((void));
2206
2207 /* In reorg.c */
2208 #ifdef BUFSIZ
2209 extern void dbr_schedule PARAMS ((rtx, FILE *));
2210 #endif
2211
2212 /* In local-alloc.c */
2213 #ifdef BUFSIZ
2214 extern void dump_local_alloc PARAMS ((FILE *));
2215 #endif
2216 extern int local_alloc PARAMS ((void));
2217 extern int function_invariant_p PARAMS ((rtx));
2218
2219 /* In coverage.c */
2220 extern void coverage_init (const char *);
2221 extern void coverage_finish (void);
2222 extern void coverage_end_function (void);
2223
2224 /* In profile.c */
2225 extern void init_branch_prob PARAMS ((void));
2226 extern void branch_prob PARAMS ((void));
2227 extern void end_branch_prob PARAMS ((void));
2228
2229 /* In reg-stack.c */
2230 #ifdef BUFSIZ
2231 extern bool reg_to_stack PARAMS ((rtx, FILE *));
2232 #endif
2233
2234 /* In fold-const.c */
2235 extern int add_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2236 unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2237 unsigned HOST_WIDE_INT *,
2238 HOST_WIDE_INT *));
2239 extern int neg_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2240 unsigned HOST_WIDE_INT *,
2241 HOST_WIDE_INT *));
2242 extern int mul_double PARAMS ((unsigned HOST_WIDE_INT,
2243 HOST_WIDE_INT,
2244 unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2245 unsigned HOST_WIDE_INT *,
2246 HOST_WIDE_INT *));
2247 extern void lshift_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2248 HOST_WIDE_INT, unsigned int,
2249 unsigned HOST_WIDE_INT *,
2250 HOST_WIDE_INT *, int));
2251 extern void rshift_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2252 HOST_WIDE_INT, unsigned int,
2253 unsigned HOST_WIDE_INT *,
2254 HOST_WIDE_INT *, int));
2255 extern void lrotate_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2256 HOST_WIDE_INT, unsigned int,
2257 unsigned HOST_WIDE_INT *,
2258 HOST_WIDE_INT *));
2259 extern void rrotate_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2260 HOST_WIDE_INT, unsigned int,
2261 unsigned HOST_WIDE_INT *,
2262 HOST_WIDE_INT *));
2263
2264 /* In calls.c */
2265 enum libcall_type
2266 {
2267 LCT_NORMAL = 0,
2268 LCT_CONST = 1,
2269 LCT_PURE = 2,
2270 LCT_CONST_MAKE_BLOCK = 3,
2271 LCT_PURE_MAKE_BLOCK = 4,
2272 LCT_NORETURN = 5,
2273 LCT_THROW = 6,
2274 LCT_ALWAYS_RETURN = 7,
2275 LCT_RETURNS_TWICE = 8
2276 };
2277
2278 extern void emit_library_call PARAMS ((rtx, enum libcall_type,
2279 enum machine_mode, int,
2280 ...));
2281 extern rtx emit_library_call_value PARAMS ((rtx, rtx, enum libcall_type,
2282 enum machine_mode, int,
2283 ...));
2284
2285 /* In unroll.c */
2286 extern int set_dominates_use PARAMS ((int, int, int, rtx, rtx));
2287
2288 /* In varasm.c */
2289 extern int in_data_section PARAMS ((void));
2290 extern void init_varasm_once PARAMS ((void));
2291
2292 /* In rtl.c */
2293 extern void init_rtl PARAMS ((void));
2294 extern void traverse_md_constants PARAMS ((int (*) (void **, void *),
2295 void *));
2296 struct md_constant { char *name, *value; };
2297
2298 #ifdef BUFSIZ
2299 extern int read_skip_spaces PARAMS ((FILE *));
2300 extern rtx read_rtx PARAMS ((FILE *));
2301 #endif
2302
2303 extern const char *read_rtx_filename;
2304 extern int read_rtx_lineno;
2305
2306 /* Redefine abort to report an internal error w/o coredump, and
2307 reporting the location of the error in the source file. This logic
2308 is duplicated in rtl.h and tree.h because every file that needs the
2309 special abort includes one or both. toplev.h gets too few files,
2310 system.h gets too many. */
2311
2312 extern void fancy_abort PARAMS ((const char *, int, const char *))
2313 ATTRIBUTE_NORETURN;
2314 #define abort() fancy_abort (__FILE__, __LINE__, __FUNCTION__)
2315
2316 /* In alias.c */
2317 extern void clear_reg_alias_info PARAMS ((rtx));
2318 extern rtx canon_rtx PARAMS ((rtx));
2319 extern int true_dependence PARAMS ((rtx, enum machine_mode, rtx,
2320 int (*)(rtx, int)));
2321 extern rtx get_addr PARAMS ((rtx));
2322 extern int canon_true_dependence PARAMS ((rtx, enum machine_mode, rtx,
2323 rtx, int (*)(rtx, int)));
2324 extern int read_dependence PARAMS ((rtx, rtx));
2325 extern int anti_dependence PARAMS ((rtx, rtx));
2326 extern int output_dependence PARAMS ((rtx, rtx));
2327 extern void mark_constant_function PARAMS ((void));
2328 extern void init_alias_once PARAMS ((void));
2329 extern void init_alias_analysis PARAMS ((void));
2330 extern void end_alias_analysis PARAMS ((void));
2331 extern rtx addr_side_effect_eval PARAMS ((rtx, int, int));
2332 extern bool memory_modified_in_insn_p PARAMS ((rtx, rtx));
2333 extern rtx find_base_term PARAMS ((rtx));
2334
2335 /* In sibcall.c */
2336 typedef enum {
2337 sibcall_use_normal = 1,
2338 sibcall_use_tail_recursion,
2339 sibcall_use_sibcall
2340 } sibcall_use_t;
2341
2342 extern void optimize_sibling_and_tail_recursive_calls PARAMS ((void));
2343 extern void replace_call_placeholder PARAMS ((rtx, sibcall_use_t));
2344
2345 #ifdef STACK_REGS
2346 extern int stack_regs_mentioned PARAMS ((rtx insn));
2347 #endif
2348
2349 /* In toplev.c */
2350 extern GTY(()) rtx stack_limit_rtx;
2351
2352 /* In regrename.c */
2353 extern void regrename_optimize PARAMS ((void));
2354 extern void copyprop_hardreg_forward PARAMS ((void));
2355
2356 /* In ifcvt.c */
2357 extern void if_convert PARAMS ((int));
2358
2359 /* In predict.c */
2360 extern void invert_br_probabilities PARAMS ((rtx));
2361 extern bool expensive_function_p PARAMS ((int));
2362 /* In tracer.c */
2363 extern void tracer PARAMS ((void));
2364
2365 /* In calls.c */
2366
2367 /* Nonzero if this is a call to a `const' function. */
2368 #define ECF_CONST 1
2369 /* Nonzero if this is a call to a `volatile' function. */
2370 #define ECF_NORETURN 2
2371 /* Nonzero if this is a call to malloc or a related function. */
2372 #define ECF_MALLOC 4
2373 /* Nonzero if it is plausible that this is a call to alloca. */
2374 #define ECF_MAY_BE_ALLOCA 8
2375 /* Nonzero if this is a call to a function that won't throw an exception. */
2376 #define ECF_NOTHROW 16
2377 /* Nonzero if this is a call to setjmp or a related function. */
2378 #define ECF_RETURNS_TWICE 32
2379 /* Nonzero if this is a call to `longjmp'. */
2380 #define ECF_LONGJMP 64
2381 /* Nonzero if this is a syscall that makes a new process in the image of
2382 the current one. */
2383 #define ECF_FORK_OR_EXEC 128
2384 #define ECF_SIBCALL 256
2385 /* Nonzero if this is a call to "pure" function (like const function,
2386 but may read memory. */
2387 #define ECF_PURE 512
2388 /* Nonzero if this is a call to a function that returns with the stack
2389 pointer depressed. */
2390 #define ECF_SP_DEPRESSED 1024
2391 /* Nonzero if this call is known to always return. */
2392 #define ECF_ALWAYS_RETURN 2048
2393 /* Create libcall block around the call. */
2394 #define ECF_LIBCALL_BLOCK 4096
2395
2396 extern int flags_from_decl_or_type PARAMS ((tree));
2397
2398 #endif /* ! GCC_RTL_H */
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