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genconfig.c (main): Generate CC0_P.
[gcc.git] / gcc / rtl.h
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 unsigned int call : 1;
155 /* 1 in a REG, MEM, or CONCAT if the value is set at most once, anywhere.
156 1 in a SUBREG if it references an unsigned object whose mode has been
157 from a promoted to a wider mode.
158 1 in a SYMBOL_REF if it addresses something in the per-function
159 constants pool.
160 1 in a CALL_INSN, NOTE, or EXPR_LIST for a const or pure call.
161 1 in a JUMP_INSN, CALL_INSN, or INSN of an annulling branch. */
162 unsigned int unchanging : 1;
163 /* 1 in a MEM or ASM_OPERANDS expression if the memory reference is volatile.
164 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL, BARRIER, or NOTE
165 if it has been deleted.
166 1 in a REG expression if corresponds to a variable declared by the user,
167 0 for an internally generated temporary.
168 1 in a SUBREG with a negative value.
169 1 in a LABEL_REF or in a REG_LABEL note for a non-local label.
170 In a SYMBOL_REF, this flag is used for machine-specific purposes. */
171 unsigned int volatil : 1;
172 /* 1 in a MEM referring to a field of an aggregate.
173 0 if the MEM was a variable or the result of a * operator in C;
174 1 if it was the result of a . or -> operator (on a struct) in C.
175 1 in a REG if the register is used only in exit code a loop.
176 1 in a SUBREG expression if was generated from a variable with a
177 promoted mode.
178 1 in a CODE_LABEL if the label is used for nonlocal gotos
179 and must not be deleted even if its count is zero.
180 1 in a LABEL_REF if this is a reference to a label outside the
181 current loop.
182 1 in an INSN, JUMP_INSN or CALL_INSN if this insn must be scheduled
183 together with the preceding insn. Valid only within sched.
184 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
185 from the target of a branch. Valid from reorg until end of compilation;
186 cleared before used.
187 1 in an INSN, JUMP_INSN or CALL_INSN or related rtx if this insn is
188 dead code. Valid only during dead-code elimination phase; cleared
189 before use. */
190 unsigned int in_struct : 1;
191 /* At the end of RTL generation, 1 if this rtx is used. This is used for
192 copying shared structure. See `unshare_all_rtl'.
193 In a REG, this is not needed for that purpose, and used instead
194 in `leaf_renumber_regs_insn'.
195 1 in a SYMBOL_REF, means that emit_library_call
196 has used it as the function. */
197 unsigned int used : 1;
198 /* Nonzero if this rtx came from procedure integration.
199 1 in a REG or PARALLEL means this rtx refers to the return value
200 of the current function.
201 1 in a SYMBOL_REF if the symbol is weak. */
202 unsigned integrated : 1;
203 /* 1 in an INSN or a SET if this rtx is related to the call frame,
204 either changing how we compute the frame address or saving and
205 restoring registers in the prologue and epilogue.
206 1 in a MEM if the MEM refers to a scalar, rather than a member of
207 an aggregate.
208 1 in a REG if the register is a pointer.
209 1 in a SYMBOL_REF if it addresses something in the per-function
210 constant string pool. */
211 unsigned frame_related : 1;
212
213 /* The first element of the operands of this rtx.
214 The number of operands and their types are controlled
215 by the `code' field, according to rtl.def. */
216 rtunion GTY ((special ("rtx_def"),
217 desc ("GET_CODE (&%0)"))) fld[1];
218 };
219
220 #define NULL_RTX (rtx) 0
221
222 /* The "next" and "previous" RTX, relative to this one. */
223
224 #define RTX_NEXT(X) (rtx_next[GET_CODE (X)] == 0 ? NULL \
225 : *(rtx *)(((char *)X) + rtx_next[GET_CODE (X)]))
226
227 /* FIXME: the "NEXT_INSN (PREV_INSN (X)) == X" condition shouldn't be needed.
228 */
229 #define RTX_PREV(X) ((GET_CODE (X) == INSN \
230 || GET_CODE (X) == CALL_INSN \
231 || GET_CODE (X) == JUMP_INSN \
232 || GET_CODE (X) == NOTE \
233 || GET_CODE (X) == BARRIER \
234 || GET_CODE (X) == CODE_LABEL) \
235 && PREV_INSN (X) != NULL \
236 && NEXT_INSN (PREV_INSN (X)) == X \
237 ? PREV_INSN (X) : NULL)
238
239 /* Define macros to access the `code' field of the rtx. */
240
241 #define GET_CODE(RTX) ((enum rtx_code) (RTX)->code)
242 #define PUT_CODE(RTX, CODE) ((RTX)->code = (ENUM_BITFIELD(rtx_code)) (CODE))
243
244 #define GET_MODE(RTX) ((enum machine_mode) (RTX)->mode)
245 #define PUT_MODE(RTX, MODE) ((RTX)->mode = (ENUM_BITFIELD(machine_mode)) (MODE))
246
247 /* RTL vector. These appear inside RTX's when there is a need
248 for a variable number of things. The principle use is inside
249 PARALLEL expressions. */
250
251 struct rtvec_def GTY(()) {
252 int num_elem; /* number of elements */
253 rtx GTY ((length ("%h.num_elem"))) elem[1];
254 };
255
256 #define NULL_RTVEC (rtvec) 0
257
258 #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
259 #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
260
261 /* Predicate yielding nonzero iff X is an rtl for a register. */
262 #define REG_P(X) (GET_CODE (X) == REG)
263
264 /* Predicate yielding nonzero iff X is a label insn. */
265 #define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
266
267 /* Predicate yielding nonzero iff X is a jump insn. */
268 #define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
269
270 /* Predicate yielding nonzero iff X is a note insn. */
271 #define NOTE_P(X) (GET_CODE (X) == NOTE)
272
273 /* Predicate yielding nonzero iff X is a barrier insn. */
274 #define BARRIER_P(X) (GET_CODE (X) == BARRIER)
275
276 /* Predicate yielding nonzero iff X is a data for a jump table. */
277 #define JUMP_TABLE_DATA_P(INSN) \
278 (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \
279 GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC))
280
281 /* 1 if X is a constant value that is an integer. */
282
283 #define CONSTANT_P(X) \
284 (GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \
285 || GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST_DOUBLE \
286 || GET_CODE (X) == CONST || GET_CODE (X) == HIGH \
287 || GET_CODE (X) == CONST_VECTOR \
288 || GET_CODE (X) == CONSTANT_P_RTX)
289
290 /* General accessor macros for accessing the fields of an rtx. */
291
292 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
293 /* The bit with a star outside the statement expr and an & inside is
294 so that N can be evaluated only once. */
295 #define RTL_CHECK1(RTX, N, C1) __extension__ \
296 (*({ rtx const _rtx = (RTX); const int _n = (N); \
297 const enum rtx_code _code = GET_CODE (_rtx); \
298 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
299 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
300 __FUNCTION__); \
301 if (GET_RTX_FORMAT(_code)[_n] != C1) \
302 rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \
303 __FUNCTION__); \
304 &_rtx->fld[_n]; }))
305
306 #define RTL_CHECK2(RTX, N, C1, C2) __extension__ \
307 (*({ rtx const _rtx = (RTX); const int _n = (N); \
308 const enum rtx_code _code = GET_CODE (_rtx); \
309 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
310 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
311 __FUNCTION__); \
312 if (GET_RTX_FORMAT(_code)[_n] != C1 \
313 && GET_RTX_FORMAT(_code)[_n] != C2) \
314 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
315 __FUNCTION__); \
316 &_rtx->fld[_n]; }))
317
318 #define RTL_CHECKC1(RTX, N, C) __extension__ \
319 (*({ rtx const _rtx = (RTX); const int _n = (N); \
320 if (GET_CODE (_rtx) != (C)) \
321 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
322 __FUNCTION__); \
323 &_rtx->fld[_n]; }))
324
325 #define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \
326 (*({ rtx const _rtx = (RTX); const int _n = (N); \
327 const enum rtx_code _code = GET_CODE (_rtx); \
328 if (_code != (C1) && _code != (C2)) \
329 rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__, \
330 __FUNCTION__); \
331 &_rtx->fld[_n]; }))
332
333 #define RTVEC_ELT(RTVEC, I) __extension__ \
334 (*({ rtvec const _rtvec = (RTVEC); const int _i = (I); \
335 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
336 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
337 __FUNCTION__); \
338 &_rtvec->elem[_i]; }))
339
340 extern void rtl_check_failed_bounds PARAMS ((rtx, int,
341 const char *, int, const char *))
342 ATTRIBUTE_NORETURN;
343 extern void rtl_check_failed_type1 PARAMS ((rtx, int, int,
344 const char *, int, const char *))
345 ATTRIBUTE_NORETURN;
346 extern void rtl_check_failed_type2 PARAMS ((rtx, int, int, int,
347 const char *, int, const char *))
348 ATTRIBUTE_NORETURN;
349 extern void rtl_check_failed_code1 PARAMS ((rtx, enum rtx_code,
350 const char *, int, const char *))
351 ATTRIBUTE_NORETURN;
352 extern void rtl_check_failed_code2 PARAMS ((rtx, enum rtx_code, enum rtx_code,
353 const char *, int, const char *))
354 ATTRIBUTE_NORETURN;
355 extern void rtvec_check_failed_bounds PARAMS ((rtvec, int,
356 const char *, int, const char *))
357 ATTRIBUTE_NORETURN;
358
359 #else /* not ENABLE_RTL_CHECKING */
360
361 #define RTL_CHECK1(RTX, N, C1) ((RTX)->fld[N])
362 #define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->fld[N])
363 #define RTL_CHECKC1(RTX, N, C) ((RTX)->fld[N])
364 #define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->fld[N])
365 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
366
367 #endif
368
369 /* General accessor macros for accessing the flags of an rtx. */
370
371 /* Access an individual rtx flag, with no checking of any kind. */
372 #define RTX_FLAG(RTX, FLAG) ((RTX)->FLAG)
373
374 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION >= 2007)
375 #define RTL_FLAG_CHECK1(NAME, RTX, C1) __extension__ \
376 ({ rtx const _rtx = (RTX); \
377 if (GET_CODE(_rtx) != C1) \
378 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
379 __FUNCTION__); \
380 _rtx; })
381
382 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) __extension__ \
383 ({ rtx const _rtx = (RTX); \
384 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2) \
385 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
386 __FUNCTION__); \
387 _rtx; })
388
389 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) __extension__ \
390 ({ rtx const _rtx = (RTX); \
391 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
392 && GET_CODE(_rtx) != C3) \
393 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
394 __FUNCTION__); \
395 _rtx; })
396
397 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) __extension__ \
398 ({ rtx const _rtx = (RTX); \
399 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
400 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4) \
401 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
402 __FUNCTION__); \
403 _rtx; })
404
405 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) __extension__ \
406 ({ rtx const _rtx = (RTX); \
407 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
408 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
409 && GET_CODE(_rtx) != C5) \
410 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
411 __FUNCTION__); \
412 _rtx; })
413
414 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) \
415 __extension__ \
416 ({ rtx const _rtx = (RTX); \
417 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
418 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
419 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6) \
420 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
421 __FUNCTION__); \
422 _rtx; })
423
424 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) \
425 __extension__ \
426 ({ rtx const _rtx = (RTX); \
427 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
428 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
429 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
430 && GET_CODE(_rtx) != C7) \
431 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
432 __FUNCTION__); \
433 _rtx; })
434
435 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) \
436 __extension__ \
437 ({ rtx const _rtx = (RTX); \
438 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
439 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
440 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
441 && GET_CODE(_rtx) != C7 && GET_CODE(_rtx) != C8) \
442 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
443 __FUNCTION__); \
444 _rtx; })
445
446 extern void rtl_check_failed_flag PARAMS ((const char *, rtx, const char *,
447 int, const char *))
448 ATTRIBUTE_NORETURN
449 ;
450
451 #else /* not ENABLE_RTL_FLAG_CHECKING */
452
453 #define RTL_FLAG_CHECK1(NAME, RTX, C1) (RTX)
454 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) (RTX)
455 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) (RTX)
456 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) (RTX)
457 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) (RTX)
458 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) (RTX)
459 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) (RTX)
460 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) (RTX)
461 #endif
462
463 #define CLEAR_RTX_FLAGS(RTX) \
464 do { \
465 rtx const _rtx = (RTX); \
466 _rtx->call = 0; \
467 _rtx->frame_related = 0; \
468 _rtx->in_struct = 0; \
469 _rtx->integrated = 0; \
470 _rtx->jump = 0; \
471 _rtx->unchanging = 0; \
472 _rtx->used = 0; \
473 _rtx->volatil = 0; \
474 } while (0)
475
476 #define XWINT(RTX, N) (RTL_CHECK1 (RTX, N, 'w').rtwint)
477 #define XINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rtint)
478 #define XSTR(RTX, N) (RTL_CHECK2 (RTX, N, 's', 'S').rtstr)
479 #define XEXP(RTX, N) (RTL_CHECK2 (RTX, N, 'e', 'u').rtx)
480 #define XVEC(RTX, N) (RTL_CHECK2 (RTX, N, 'E', 'V').rtvec)
481 #define XMODE(RTX, N) (RTL_CHECK1 (RTX, N, 'M').rttype)
482 #define XBITMAP(RTX, N) (RTL_CHECK1 (RTX, N, 'b').rtbit)
483 #define XTREE(RTX, N) (RTL_CHECK1 (RTX, N, 't').rttree)
484 #define XBBDEF(RTX, N) (RTL_CHECK1 (RTX, N, 'B').bb)
485 #define XTMPL(RTX, N) (RTL_CHECK1 (RTX, N, 'T').rtstr)
486
487 #define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
488 #define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
489
490 /* These are like XWINT, etc. except that they expect a '0' field instead
491 of the normal type code. */
492
493 #define X0WINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtwint)
494 #define X0INT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtint)
495 #define X0UINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtuint)
496 #define X0STR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtstr)
497 #define X0EXP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtx)
498 #define X0VEC(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtvec)
499 #define X0MODE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rttype)
500 #define X0BITMAP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtbit)
501 #define X0TREE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rttree)
502 #define X0BBDEF(RTX, N) (RTL_CHECK1 (RTX, N, '0').bb)
503 #define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags)
504 #define X0CSELIB(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_cselib)
505 #define X0MEMATTR(RTX, N) (RTL_CHECKC1 (RTX, N, MEM).rtmem)
506 #define X0REGATTR(RTX, N) (RTL_CHECKC1 (RTX, N, REG).rtreg)
507
508 #define XCWINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtwint)
509 #define XCINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtint)
510 #define XCUINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtuint)
511 #define XCSTR(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtstr)
512 #define XCEXP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtx)
513 #define XCVEC(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtvec)
514 #define XCMODE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rttype)
515 #define XCBITMAP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtbit)
516 #define XCTREE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rttree)
517 #define XCBBDEF(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).bb)
518 #define XCADVFLAGS(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_addr_diff_vec_flags)
519 #define XCCSELIB(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cselib)
520
521 #define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
522 #define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
523
524 #define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2 (RTX, N, C1, C2).rtx)
525 \f
526 /* ACCESS MACROS for particular fields of insns. */
527
528 /* Determines whether X is an insn. */
529 #define INSN_P(X) (GET_RTX_CLASS (GET_CODE(X)) == 'i')
530
531 /* Holds a unique number for each insn.
532 These are not necessarily sequentially increasing. */
533 #define INSN_UID(INSN) XINT (INSN, 0)
534
535 /* Chain insns together in sequence. */
536 #define PREV_INSN(INSN) XEXP (INSN, 1)
537 #define NEXT_INSN(INSN) XEXP (INSN, 2)
538
539 #define BLOCK_FOR_INSN(INSN) XBBDEF (INSN, 3)
540 #define INSN_SCOPE(INSN) XTREE (INSN, 4)
541 /* The body of an insn. */
542 #define PATTERN(INSN) XEXP (INSN, 5)
543
544 /* Code number of instruction, from when it was recognized.
545 -1 means this instruction has not been recognized yet. */
546 #define INSN_CODE(INSN) XINT (INSN, 6)
547
548 /* Set up in flow.c; empty before then.
549 Holds a chain of INSN_LIST rtx's whose first operands point at
550 previous insns with direct data-flow connections to this one.
551 That means that those insns set variables whose next use is in this insn.
552 They are always in the same basic block as this insn. */
553 #define LOG_LINKS(INSN) XEXP(INSN, 7)
554
555 #define RTX_INTEGRATED_P(RTX) \
556 (RTL_FLAG_CHECK8("RTX_INTEGRATED_P", (RTX), INSN, CALL_INSN, \
557 JUMP_INSN, INSN_LIST, BARRIER, CODE_LABEL, CONST, \
558 NOTE)->integrated)
559 #define RTX_UNCHANGING_P(RTX) \
560 (RTL_FLAG_CHECK3("RTX_UNCHANGING_P", (RTX), REG, MEM, CONCAT)->unchanging)
561 #define RTX_FRAME_RELATED_P(RTX) \
562 (RTL_FLAG_CHECK5("RTX_FRAME_RELATED_P", (RTX), INSN, CALL_INSN, \
563 JUMP_INSN, BARRIER, SET)->frame_related)
564
565 /* 1 if RTX is an insn that has been deleted. */
566 #define INSN_DELETED_P(RTX) \
567 (RTL_FLAG_CHECK6("INSN_DELETED_P", (RTX), INSN, CALL_INSN, JUMP_INSN, \
568 CODE_LABEL, BARRIER, NOTE)->volatil)
569
570 /* 1 if RTX is a call to a const or pure function. */
571 #define CONST_OR_PURE_CALL_P(RTX) \
572 (RTL_FLAG_CHECK3("CONST_OR_PURE_CALL_P", (RTX), CALL_INSN, NOTE, \
573 EXPR_LIST)->unchanging)
574
575 /* 1 if RTX is a call_insn for a sibling call. */
576 #define SIBLING_CALL_P(RTX) \
577 (RTL_FLAG_CHECK1("SIBLING_CALL_P", (RTX), CALL_INSN)->jump)
578
579 /* 1 if RTX is a jump_insn, call_insn, or insn that is an annulling branch. */
580 #define INSN_ANNULLED_BRANCH_P(RTX) \
581 (RTL_FLAG_CHECK3("INSN_ANNULLED_BRANCH_P", (RTX), JUMP_INSN, CALL_INSN, INSN)->unchanging)
582
583 /* 1 if RTX is an insn that is dead code. Valid only for dead-code
584 elimination phase. */
585 #define INSN_DEAD_CODE_P(RTX) \
586 (RTL_FLAG_CHECK3("INSN_DEAD_CODE_P", (RTX), INSN, CALL_INSN, JUMP_INSN)->in_struct)
587
588 /* 1 if RTX is an insn in a delay slot and is from the target of the branch.
589 If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
590 executed if the branch is taken. For annulled branches with this bit
591 clear, the insn should be executed only if the branch is not taken. */
592 #define INSN_FROM_TARGET_P(RTX) \
593 (RTL_FLAG_CHECK3("INSN_FROM_TARGET_P", (RTX), INSN, JUMP_INSN, CALL_INSN)->in_struct)
594
595 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
596
597 #define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
598
599 /* Holds a list of notes on what this insn does to various REGs.
600 It is a chain of EXPR_LIST rtx's, where the second operand is the
601 chain pointer and the first operand is the REG being described.
602 The mode field of the EXPR_LIST contains not a real machine mode
603 but a value from enum reg_note. */
604
605 #define REG_NOTES(INSN) XEXP(INSN, 8)
606
607 /* Don't forget to change reg_note_name in rtl.c. */
608 enum reg_note
609 {
610 /* The value in REG dies in this insn (i.e., it is not needed past
611 this insn). If REG is set in this insn, the REG_DEAD note may,
612 but need not, be omitted. */
613 REG_DEAD = 1,
614
615 /* The REG is autoincremented or autodecremented. */
616 REG_INC,
617
618 /* Describes the insn as a whole; it says that the insn sets a register
619 to a constant value or to be equivalent to a memory address. If the
620 register is spilled to the stack then the constant value should be
621 substituted for it. The contents of the REG_EQUIV is the constant
622 value or memory address, which may be different from the source of
623 the SET although it has the same value. A REG_EQUIV note may also
624 appear on an insn which copies a register parameter to a pseudo-register,
625 if there is a memory address which could be used to hold that
626 pseudo-register throughout the function. */
627 REG_EQUIV,
628
629 /* Like REG_EQUIV except that the destination is only momentarily equal
630 to the specified rtx. Therefore, it cannot be used for substitution;
631 but it can be used for cse. */
632 REG_EQUAL,
633
634 /* The register set in this insn held 0 before the insn. The contents of
635 the note is the insn that stored the 0. If that insn is deleted or
636 patched to a NOTE, the REG_WAS_0 is inoperative. The REG_WAS_0 note
637 is actually an INSN_LIST, not an EXPR_LIST. */
638 REG_WAS_0,
639
640 /* This insn copies the return-value of a library call out of the hard reg
641 for return values. This note is actually an INSN_LIST and it points to
642 the first insn involved in setting up arguments for the call. flow.c
643 uses this to delete the entire library call when its result is dead. */
644 REG_RETVAL,
645
646 /* The inverse of REG_RETVAL: it goes on the first insn of the library call
647 and points at the one that has the REG_RETVAL. This note is also an
648 INSN_LIST. */
649 REG_LIBCALL,
650
651 /* The register is always nonnegative during the containing loop. This is
652 used in branches so that decrement and branch instructions terminating
653 on zero can be matched. There must be an insn pattern in the md file
654 named `decrement_and_branch_until_zero' or else this will never be added
655 to any instructions. */
656 REG_NONNEG,
657
658 /* There is no conflict *after this insn* between the register in the note
659 and the destination of this insn. */
660 REG_NO_CONFLICT,
661
662 /* Identifies a register set in this insn and never used. */
663 REG_UNUSED,
664
665 /* REG_CC_SETTER and REG_CC_USER link a pair of insns that set and use CC0,
666 respectively. Normally, these are required to be consecutive insns, but
667 we permit putting a cc0-setting insn in the delay slot of a branch as
668 long as only one copy of the insn exists. In that case, these notes
669 point from one to the other to allow code generation to determine what
670 any require information and to properly update CC_STATUS. These notes
671 are INSN_LISTs. */
672 REG_CC_SETTER, REG_CC_USER,
673
674 /* Points to a CODE_LABEL. Used by non-JUMP_INSNs to say that the
675 CODE_LABEL contained in the REG_LABEL note is used by the insn.
676 This note is an INSN_LIST. */
677 REG_LABEL,
678
679 /* REG_DEP_ANTI and REG_DEP_OUTPUT are used in LOG_LINKS to represent
680 write-after-read and write-after-write dependencies respectively.
681 Data dependencies, which are the only type of LOG_LINK created by
682 flow, are represented by a 0 reg note kind. */
683 REG_DEP_ANTI, REG_DEP_OUTPUT,
684
685 /* REG_BR_PROB is attached to JUMP_INSNs and CALL_INSNs.
686 It has an integer value. For jumps, it is the probability that this is a
687 taken branch. For calls, it is the probability that this call won't
688 return. */
689 REG_BR_PROB,
690
691 /* REG_EXEC_COUNT is attached to the first insn of each basic block, and
692 the first insn after each CALL_INSN. It indicates how many times this
693 block was executed. */
694 REG_EXEC_COUNT,
695
696 /* Attached to a call insn; indicates that the call is malloc-like and
697 that the pointer returned cannot alias anything else. */
698 REG_NOALIAS,
699
700 /* Used to optimize rtl generated by dynamic stack allocations for targets
701 where SETJMP_VIA_SAVE_AREA is true. */
702 REG_SAVE_AREA,
703
704 /* REG_BR_PRED is attached to JUMP_INSNs and CALL_INSNSs. It contains
705 CONCAT of two integer value. First specifies the branch predictor
706 that added the note, second specifies the predicted hitrate of branch
707 in the same format as REG_BR_PROB note uses. */
708 REG_BR_PRED,
709
710 /* Attached to insns that are RTX_FRAME_RELATED_P, but are too complex
711 for DWARF to interpret what they imply. The attached rtx is used
712 instead of intuition. */
713 REG_FRAME_RELATED_EXPR,
714
715 /* Indicates that REG holds the exception context for the function.
716 This context is shared by inline functions, so the code to acquire
717 the real exception context is delayed until after inlining. */
718 REG_EH_CONTEXT,
719
720 /* Indicates what exception region an INSN belongs in. This is used to
721 indicate what region to which a call may throw. REGION 0 indicates
722 that a call cannot throw at all. REGION -1 indicates that it cannot
723 throw, nor will it execute a non-local goto. */
724 REG_EH_REGION,
725
726 /* Used by haifa-sched to save NOTE_INSN notes across scheduling. */
727 REG_SAVE_NOTE,
728
729 /* Indicates that this insn (which is part of the prologue) computes
730 a value which might not be used later, and if so it's OK to delete
731 the insn. Normally, deleting any insn in the prologue is an error.
732 At present the parameter is unused and set to (const_int 0). */
733 REG_MAYBE_DEAD,
734
735 /* Indicates that a call does not return. */
736 REG_NORETURN,
737
738 /* Indicates that an indirect jump is a non-local goto instead of a
739 computed goto. */
740 REG_NON_LOCAL_GOTO,
741
742 /* This kind of note is generated at each to `setjmp',
743 and similar functions that can return twice. */
744 REG_SETJMP,
745
746 /* Indicate calls that always returns. */
747 REG_ALWAYS_RETURN,
748
749 /* Indicate that the memory load references a vtable. The expression
750 is of the form (plus (symbol_ref vtable_sym) (const_int offset)). */
751 REG_VTABLE_REF
752 };
753
754 /* The base value for branch probability notes. */
755 #define REG_BR_PROB_BASE 10000
756
757 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
758 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
759 #define PUT_REG_NOTE_KIND(LINK, KIND) \
760 PUT_MODE (LINK, (enum machine_mode) (KIND))
761
762 /* Names for REG_NOTE's in EXPR_LIST insn's. */
763
764 extern const char * const reg_note_name[];
765 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
766
767 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
768 USE and CLOBBER expressions.
769 USE expressions list the registers filled with arguments that
770 are passed to the function.
771 CLOBBER expressions document the registers explicitly clobbered
772 by this CALL_INSN.
773 Pseudo registers can not be mentioned in this list. */
774 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 9)
775
776 /* The label-number of a code-label. The assembler label
777 is made from `L' and the label-number printed in decimal.
778 Label numbers are unique in a compilation. */
779 #define CODE_LABEL_NUMBER(INSN) XINT (INSN, 6)
780
781 #define LINE_NUMBER NOTE
782
783 /* In a NOTE that is a line number, this is a string for the file name that the
784 line is in. We use the same field to record block numbers temporarily in
785 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
786 between ints and pointers if we use a different macro for the block number.)
787 */
788
789 #define NOTE_SOURCE_FILE(INSN) XCSTR (INSN, 4, NOTE)
790 #define NOTE_BLOCK(INSN) XCTREE (INSN, 4, NOTE)
791 #define NOTE_EH_HANDLER(INSN) XCINT (INSN, 4, NOTE)
792 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 4, NOTE)
793 #define NOTE_EXPECTED_VALUE(INSN) XCEXP (INSN, 4, NOTE)
794 #define NOTE_PREDICTION(INSN) XCINT (INSN, 4, NOTE)
795 #define NOTE_PRECONDITIONED(INSN) XCINT (INSN, 4, NOTE)
796
797 /* In a NOTE that is a line number, this is the line number.
798 Other kinds of NOTEs are identified by negative numbers here. */
799 #define NOTE_LINE_NUMBER(INSN) XCINT (INSN, 5, NOTE)
800
801 /* Nonzero if INSN is a note marking the beginning of a basic block. */
802 #define NOTE_INSN_BASIC_BLOCK_P(INSN) \
803 (GET_CODE (INSN) == NOTE \
804 && NOTE_LINE_NUMBER (INSN) == NOTE_INSN_BASIC_BLOCK)
805
806 /* Algorithm and flags for prediction. */
807 #define NOTE_PREDICTION_ALG(INSN) (XCINT(INSN, 4, NOTE)>>8)
808 #define NOTE_PREDICTION_FLAGS(INSN) (XCINT(INSN, 4, NOTE)&0xff)
809 #define NOTE_PREDICT(ALG,FLAGS) ((ALG<<8)+(FLAGS))
810
811 /* Codes that appear in the NOTE_LINE_NUMBER field
812 for kinds of notes that are not line numbers.
813
814 Notice that we do not try to use zero here for any of
815 the special note codes because sometimes the source line
816 actually can be zero! This happens (for example) when we
817 are generating code for the per-translation-unit constructor
818 and destructor routines for some C++ translation unit.
819
820 If you should change any of the following values, or if you
821 should add a new value here, don't forget to change the
822 note_insn_name array in rtl.c. */
823
824 enum insn_note
825 {
826 /* Keep all of these numbers negative. Adjust as needed. */
827 NOTE_INSN_BIAS = -100,
828
829 /* This note is used to get rid of an insn
830 when it isn't safe to patch the insn out of the chain. */
831 NOTE_INSN_DELETED,
832
833 /* These are used to mark the beginning and end of a lexical block.
834 See NOTE_BLOCK, identify_blocks and reorder_blocks. */
835 NOTE_INSN_BLOCK_BEG,
836 NOTE_INSN_BLOCK_END,
837
838 /* These mark the extremes of a loop. */
839 NOTE_INSN_LOOP_BEG,
840 NOTE_INSN_LOOP_END,
841
842 /* Generated at the place in a loop that `continue' jumps to. */
843 NOTE_INSN_LOOP_CONT,
844 /* Generated at the start of a duplicated exit test. */
845 NOTE_INSN_LOOP_VTOP,
846
847 /* Generated at the end of a conditional at the top of the loop.
848 This is used to perform a lame form of loop rotation in lieu
849 of actually understanding the loop structure. The note is
850 discarded after rotation is complete. */
851 NOTE_INSN_LOOP_END_TOP_COND,
852
853 /* This kind of note is generated at the end of the function body,
854 just before the return insn or return label. In an optimizing
855 compilation it is deleted by the first jump optimization, after
856 enabling that optimizer to determine whether control can fall
857 off the end of the function body without a return statement. */
858 NOTE_INSN_FUNCTION_END,
859
860 /* This marks the point immediately after the last prologue insn. */
861 NOTE_INSN_PROLOGUE_END,
862
863 /* This marks the point immediately prior to the first epilogue insn. */
864 NOTE_INSN_EPILOGUE_BEG,
865
866 /* Generated in place of user-declared labels when they are deleted. */
867 NOTE_INSN_DELETED_LABEL,
868
869 /* This note indicates the start of the real body of the function,
870 i.e. the point just after all of the parms have been moved into
871 their homes, etc. */
872 NOTE_INSN_FUNCTION_BEG,
873
874 /* These note where exception handling regions begin and end.
875 Uses NOTE_EH_HANDLER to identify the region in question. */
876 NOTE_INSN_EH_REGION_BEG,
877 NOTE_INSN_EH_REGION_END,
878
879 /* Generated whenever a duplicate line number note is output. For example,
880 one is output after the end of an inline function, in order to prevent
881 the line containing the inline call from being counted twice in gcov. */
882 NOTE_INSN_REPEATED_LINE_NUMBER,
883
884 /* Record the struct for the following basic block. Uses NOTE_BASIC_BLOCK. */
885 NOTE_INSN_BASIC_BLOCK,
886
887 /* Record the expected value of a register at a location. Uses
888 NOTE_EXPECTED_VALUE; stored as (eq (reg) (const_int)). */
889 NOTE_INSN_EXPECTED_VALUE,
890
891 /* Record a prediction. Uses NOTE_PREDICTION. */
892 NOTE_INSN_PREDICTION,
893
894 NOTE_INSN_MAX
895 };
896
897 /* Names for NOTE insn's other than line numbers. */
898
899 extern const char * const note_insn_name[NOTE_INSN_MAX - NOTE_INSN_BIAS];
900 #define GET_NOTE_INSN_NAME(NOTE_CODE) \
901 (note_insn_name[(NOTE_CODE) - (int) NOTE_INSN_BIAS])
902
903 /* The name of a label, in case it corresponds to an explicit label
904 in the input source code. */
905 #define LABEL_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL)
906
907 /* In jump.c, each label contains a count of the number
908 of LABEL_REFs that point at it, so unused labels can be deleted. */
909 #define LABEL_NUSES(RTX) XCINT (RTX, 4, CODE_LABEL)
910
911 /* Labels carry a two-bit field composed of the ->jump and ->call
912 bits. This field indicates whether the label is an alternate
913 entry point, and if so, what kind. */
914 enum label_kind
915 {
916 LABEL_NORMAL = 0, /* ordinary label */
917 LABEL_STATIC_ENTRY, /* alternate entry point, not exported */
918 LABEL_GLOBAL_ENTRY, /* alternate entry point, exported */
919 LABEL_WEAK_ENTRY /* alternate entry point, exported as weak symbol */
920 };
921
922 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION > 2007)
923
924 /* Retrieve the kind of LABEL. */
925 #define LABEL_KIND(LABEL) __extension__ \
926 ({ rtx const _label = (LABEL); \
927 if (GET_CODE (_label) != CODE_LABEL) \
928 rtl_check_failed_flag ("LABEL_KIND", _label, __FILE__, __LINE__, \
929 __FUNCTION__); \
930 (enum label_kind) ((_label->jump << 1) | _label->call); })
931
932 /* Set the kind of LABEL. */
933 #define SET_LABEL_KIND(LABEL, KIND) do { \
934 rtx _label = (LABEL); \
935 unsigned int _kind = (KIND); \
936 if (GET_CODE (_label) != CODE_LABEL) \
937 rtl_check_failed_flag ("SET_LABEL_KIND", _label, __FILE__, __LINE__, \
938 __FUNCTION__); \
939 _label->jump = ((_kind >> 1) & 1); \
940 _label->call = (_kind & 1); \
941 } while (0)
942
943 #else
944
945 /* Retrieve the kind of LABEL. */
946 #define LABEL_KIND(LABEL) \
947 ((enum label_kind) (((LABEL)->jump << 1) | (LABEL)->call))
948
949 /* Set the kind of LABEL. */
950 #define SET_LABEL_KIND(LABEL, KIND) do { \
951 rtx _label = (LABEL); \
952 unsigned int _kind = (KIND); \
953 _label->jump = ((_kind >> 1) & 1); \
954 _label->call = (_kind & 1); \
955 } while (0)
956
957 #endif /* rtl flag checking */
958
959 #define LABEL_ALT_ENTRY_P(LABEL) (LABEL_KIND (LABEL) != LABEL_NORMAL)
960
961 /* The original regno this ADDRESSOF was built for. */
962 #define ADDRESSOF_REGNO(RTX) XCUINT (RTX, 1, ADDRESSOF)
963
964 /* The variable in the register we took the address of. */
965 #define ADDRESSOF_DECL(RTX) XCTREE (RTX, 2, ADDRESSOF)
966
967 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
968 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
969 be decremented and possibly the label can be deleted. */
970 #define JUMP_LABEL(INSN) XCEXP (INSN, 9, JUMP_INSN)
971
972 /* Once basic blocks are found in flow.c,
973 each CODE_LABEL starts a chain that goes through
974 all the LABEL_REFs that jump to that label.
975 The chain eventually winds up at the CODE_LABEL: it is circular. */
976 #define LABEL_REFS(LABEL) XCEXP (LABEL, 5, CODE_LABEL)
977 \f
978 /* This is the field in the LABEL_REF through which the circular chain
979 of references to a particular label is linked.
980 This chain is set up in flow.c. */
981
982 #define LABEL_NEXTREF(REF) XCEXP (REF, 1, LABEL_REF)
983
984 /* Once basic blocks are found in flow.c,
985 Each LABEL_REF points to its containing instruction with this field. */
986
987 #define CONTAINING_INSN(RTX) XCEXP (RTX, 2, LABEL_REF)
988
989 /* For a REG rtx, REGNO extracts the register number. ORIGINAL_REGNO holds
990 the number the register originally had; for a pseudo register turned into
991 a hard reg this will hold the old pseudo register number. */
992
993 #define REGNO(RTX) XCUINT (RTX, 0, REG)
994 #define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
995
996 /* 1 if RTX is a reg or parallel that is the current function's return
997 value. */
998 #define REG_FUNCTION_VALUE_P(RTX) \
999 (RTL_FLAG_CHECK2("REG_FUNCTION_VALUE_P", (RTX), REG, PARALLEL)->integrated)
1000
1001 /* 1 if RTX is a reg that corresponds to a variable declared by the user. */
1002 #define REG_USERVAR_P(RTX) \
1003 (RTL_FLAG_CHECK1("REG_USERVAR_P", (RTX), REG)->volatil)
1004
1005 /* 1 if RTX is a reg that holds a pointer value. */
1006 #define REG_POINTER(RTX) \
1007 (RTL_FLAG_CHECK1("REG_POINTER", (RTX), REG)->frame_related)
1008
1009 /* 1 if the given register REG corresponds to a hard register. */
1010 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
1011
1012 /* 1 if the given register number REG_NO corresponds to a hard register. */
1013 #define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
1014
1015 /* For a CONST_INT rtx, INTVAL extracts the integer. */
1016
1017 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
1018
1019 /* For a CONST_DOUBLE:
1020 For a DImode, there are two integers CONST_DOUBLE_LOW is the
1021 low-order word and ..._HIGH the high-order.
1022 For a float, there is a REAL_VALUE_TYPE structure, and
1023 CONST_DOUBLE_REAL_VALUE(r) is a pointer to it. */
1024 #define CONST_DOUBLE_LOW(r) XCWINT (r, 0, CONST_DOUBLE)
1025 #define CONST_DOUBLE_HIGH(r) XCWINT (r, 1, CONST_DOUBLE)
1026 #define CONST_DOUBLE_REAL_VALUE(r) ((struct real_value *)&CONST_DOUBLE_LOW(r))
1027
1028 /* For a CONST_VECTOR, return element #n. */
1029 #define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR)
1030
1031 /* For a CONST_VECTOR, return the number of elements in a vector. */
1032 #define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR)
1033
1034 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
1035 SUBREG_BYTE extracts the byte-number. */
1036
1037 #define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
1038 #define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
1039
1040 /* in rtlanal.c */
1041 extern unsigned int subreg_lsb PARAMS ((rtx));
1042 extern unsigned int subreg_regno_offset 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 /* If VAL is nonzero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
1114 RTX. Otherwise, vice versa. Use this macro only when you are
1115 *sure* that you know that the MEM is in a structure, or is a
1116 scalar. VAL is evaluated only once. */
1117 #define MEM_SET_IN_STRUCT_P(RTX, VAL) \
1118 do { \
1119 if (VAL) \
1120 { \
1121 MEM_IN_STRUCT_P (RTX) = 1; \
1122 MEM_SCALAR_P (RTX) = 0; \
1123 } \
1124 else \
1125 { \
1126 MEM_IN_STRUCT_P (RTX) = 0; \
1127 MEM_SCALAR_P (RTX) = 1; \
1128 } \
1129 } while (0)
1130
1131 /* The memory attribute block. We provide access macros for each value
1132 in the block and provide defaults if none specified. */
1133 #define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
1134
1135 /* The register attribute block. We provide access macros for each value
1136 in the block and provide defaults if none specified. */
1137 #define REG_ATTRS(RTX) X0REGATTR (RTX, 2)
1138
1139 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
1140 set, and may alias anything. Otherwise, the MEM can only alias
1141 MEMs in the same alias set. This value is set in a
1142 language-dependent manner in the front-end, and should not be
1143 altered in the back-end. These set numbers are tested for zero,
1144 and compared for equality; they have no other significance. In
1145 some front-ends, these numbers may correspond in some way to types,
1146 or other language-level entities, but they need not, and the
1147 back-end makes no such assumptions. */
1148 #define MEM_ALIAS_SET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->alias)
1149
1150 /* For a MEM rtx, the decl it is known to refer to, if it is known to
1151 refer to part of a DECL. It may also be a COMPONENT_REF. */
1152 #define MEM_EXPR(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->expr)
1153
1154 /* For a MEM rtx, the offset from the start of MEM_EXPR, if known, as a
1155 RTX that is always a CONST_INT. */
1156 #define MEM_OFFSET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->offset)
1157
1158 /* For a MEM rtx, the size in bytes of the MEM, if known, as an RTX that
1159 is always a CONST_INT. */
1160 #define MEM_SIZE(RTX) \
1161 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->size \
1162 : GET_MODE (RTX) != BLKmode ? GEN_INT (GET_MODE_SIZE (GET_MODE (RTX))) \
1163 : 0)
1164
1165 /* For a MEM rtx, the alignment in bits. We can use the alignment of the
1166 mode as a default when STRICT_ALIGNMENT, but not if not. */
1167 #define MEM_ALIGN(RTX) \
1168 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->align \
1169 : (STRICT_ALIGNMENT && GET_MODE (RTX) != BLKmode \
1170 ? GET_MODE_ALIGNMENT (GET_MODE (RTX)) : BITS_PER_UNIT))
1171
1172 /* For a REG rtx, the decl it is known to refer to, if it is known to
1173 refer to part of a DECL. */
1174 #define REG_EXPR(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->decl)
1175
1176 /* For a MEM rtx, the offset from the start of MEM_DECL, if known, as a
1177 RTX that is always a CONST_INT. */
1178 #define REG_OFFSET(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->offset)
1179
1180 /* Copy the attributes that apply to memory locations from RHS to LHS. */
1181 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
1182 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
1183 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
1184 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
1185 RTX_UNCHANGING_P (LHS) = RTX_UNCHANGING_P (RHS), \
1186 MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \
1187 MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
1188
1189 /* 1 if RTX is a label_ref to a label outside the loop containing the
1190 reference. */
1191 #define LABEL_OUTSIDE_LOOP_P(RTX) \
1192 (RTL_FLAG_CHECK1("LABEL_OUTSIDE_LOOP_P", (RTX), LABEL_REF)->in_struct)
1193
1194 /* 1 if RTX is a label_ref for a nonlocal label. */
1195 /* Likewise in an expr_list for a reg_label note. */
1196 #define LABEL_REF_NONLOCAL_P(RTX) \
1197 (RTL_FLAG_CHECK2("LABEL_REF_NONLOCAL_P", (RTX), LABEL_REF, \
1198 REG_LABEL)->volatil)
1199
1200 /* 1 if RTX is a code_label that should always be considered to be needed. */
1201 #define LABEL_PRESERVE_P(RTX) \
1202 (RTL_FLAG_CHECK2("LABEL_PRESERVE_P", (RTX), CODE_LABEL, NOTE)->in_struct)
1203
1204 /* 1 if RTX is a reg that is used only in an exit test of a loop. */
1205 #define REG_LOOP_TEST_P(RTX) \
1206 (RTL_FLAG_CHECK1("REG_LOOP_TEST_P", (RTX), REG)->in_struct)
1207
1208 /* During sched, 1 if RTX is an insn that must be scheduled together
1209 with the preceding insn. */
1210 #define SCHED_GROUP_P(RTX) \
1211 (RTL_FLAG_CHECK3("SCHED_GROUP_P", (RTX), INSN, JUMP_INSN, CALL_INSN \
1212 )->in_struct)
1213
1214 /* For a SET rtx, SET_DEST is the place that is set
1215 and SET_SRC is the value it is set to. */
1216 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
1217 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
1218 #define SET_IS_RETURN_P(RTX) \
1219 (RTL_FLAG_CHECK1("SET_IS_RETURN_P", (RTX), SET)->jump)
1220
1221 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
1222 #define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
1223 #define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
1224
1225 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
1226 conditionally executing the code on, COND_EXEC_CODE is the code
1227 to execute if the condition is true. */
1228 #define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
1229 #define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
1230
1231 /* 1 if RTX is a symbol_ref that addresses this function's constants pool. */
1232 #define CONSTANT_POOL_ADDRESS_P(RTX) \
1233 (RTL_FLAG_CHECK1("CONSTANT_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->unchanging)
1234
1235 /* 1 if RTX is a symbol_ref that addresses this function's string constant
1236 pool */
1237 #define STRING_POOL_ADDRESS_P(RTX) \
1238 (RTL_FLAG_CHECK1("STRING_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->frame_related)
1239
1240 /* Used if RTX is a symbol_ref, for machine-specific purposes. */
1241 #define SYMBOL_REF_FLAG(RTX) \
1242 (RTL_FLAG_CHECK1("SYMBOL_REF_FLAG", (RTX), SYMBOL_REF)->volatil)
1243
1244 /* 1 if RTX is a symbol_ref that has been the library function in
1245 emit_library_call. */
1246 #define SYMBOL_REF_USED(RTX) \
1247 (RTL_FLAG_CHECK1("SYMBOL_REF_USED", (RTX), SYMBOL_REF)->used)
1248
1249 /* 1 if RTX is a symbol_ref for a weak symbol. */
1250 #define SYMBOL_REF_WEAK(RTX) \
1251 (RTL_FLAG_CHECK1("SYMBOL_REF_WEAK", (RTX), SYMBOL_REF)->integrated)
1252
1253 /* Define a macro to look for REG_INC notes,
1254 but save time on machines where they never exist. */
1255
1256 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
1257 #define FIND_REG_INC_NOTE(INSN, REG) \
1258 ((REG) != NULL_RTX && REG_P ((REG)) \
1259 ? find_regno_note ((INSN), REG_INC, REGNO (REG)) \
1260 : find_reg_note ((INSN), REG_INC, (REG)))
1261 #else
1262 #define FIND_REG_INC_NOTE(INSN, REG) 0
1263 #endif
1264
1265 /* Indicate whether the machine has any sort of auto increment addressing.
1266 If not, we can avoid checking for REG_INC notes. */
1267
1268 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
1269 #define AUTO_INC_DEC
1270 #endif
1271
1272 #ifndef HAVE_PRE_INCREMENT
1273 #define HAVE_PRE_INCREMENT 0
1274 #endif
1275
1276 #ifndef HAVE_PRE_DECREMENT
1277 #define HAVE_PRE_DECREMENT 0
1278 #endif
1279
1280 #ifndef HAVE_POST_INCREMENT
1281 #define HAVE_POST_INCREMENT 0
1282 #endif
1283
1284 #ifndef HAVE_POST_DECREMENT
1285 #define HAVE_POST_DECREMENT 0
1286 #endif
1287
1288 #ifndef HAVE_POST_MODIFY_DISP
1289 #define HAVE_POST_MODIFY_DISP 0
1290 #endif
1291
1292 #ifndef HAVE_POST_MODIFY_REG
1293 #define HAVE_POST_MODIFY_REG 0
1294 #endif
1295
1296 #ifndef HAVE_PRE_MODIFY_DISP
1297 #define HAVE_PRE_MODIFY_DISP 0
1298 #endif
1299
1300 #ifndef HAVE_PRE_MODIFY_REG
1301 #define HAVE_PRE_MODIFY_REG 0
1302 #endif
1303
1304
1305 /* Some architectures do not have complete pre/post increment/decrement
1306 instruction sets, or only move some modes efficiently. These macros
1307 allow us to tune autoincrement generation. */
1308
1309 #ifndef USE_LOAD_POST_INCREMENT
1310 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1311 #endif
1312
1313 #ifndef USE_LOAD_POST_DECREMENT
1314 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1315 #endif
1316
1317 #ifndef USE_LOAD_PRE_INCREMENT
1318 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1319 #endif
1320
1321 #ifndef USE_LOAD_PRE_DECREMENT
1322 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1323 #endif
1324
1325 #ifndef USE_STORE_POST_INCREMENT
1326 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1327 #endif
1328
1329 #ifndef USE_STORE_POST_DECREMENT
1330 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1331 #endif
1332
1333 #ifndef USE_STORE_PRE_INCREMENT
1334 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1335 #endif
1336
1337 #ifndef USE_STORE_PRE_DECREMENT
1338 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1339 #endif
1340
1341 /* Determine if the insn is a PHI node. */
1342 #define PHI_NODE_P(X) \
1343 ((X) && GET_CODE (X) == INSN \
1344 && GET_CODE (PATTERN (X)) == SET \
1345 && GET_CODE (SET_SRC (PATTERN (X))) == PHI)
1346 \f
1347 /* Nonzero if we need to distinguish between the return value of this function
1348 and the return value of a function called by this function. This helps
1349 integrate.c.
1350 This is 1 until after the rtl generation pass. */
1351 extern int rtx_equal_function_value_matters;
1352
1353 /* Nonzero when we are generating CONCATs. */
1354 extern int generating_concat_p;
1355
1356 /* Generally useful functions. */
1357
1358 /* In expmed.c */
1359 extern int ceil_log2 PARAMS ((unsigned HOST_WIDE_INT));
1360
1361 #define plus_constant(X, C) plus_constant_wide ((X), (HOST_WIDE_INT) (C))
1362
1363 /* In builtins.c */
1364 extern rtx expand_builtin_expect_jump PARAMS ((tree, rtx, rtx));
1365 extern void purge_builtin_constant_p PARAMS ((void));
1366
1367 /* In explow.c */
1368 extern void set_stack_check_libfunc PARAMS ((rtx));
1369 extern HOST_WIDE_INT trunc_int_for_mode PARAMS ((HOST_WIDE_INT,
1370 enum machine_mode));
1371 extern rtx plus_constant_wide PARAMS ((rtx, HOST_WIDE_INT));
1372 extern rtx plus_constant_for_output_wide PARAMS ((rtx, HOST_WIDE_INT));
1373 extern void optimize_save_area_alloca PARAMS ((rtx));
1374
1375 /* In emit-rtl.c */
1376 extern rtx gen_rtx PARAMS ((enum rtx_code,
1377 enum machine_mode, ...));
1378 extern rtvec gen_rtvec PARAMS ((int, ...));
1379 extern rtx copy_insn_1 PARAMS ((rtx));
1380 extern rtx copy_insn PARAMS ((rtx));
1381 extern rtx gen_int_mode PARAMS ((HOST_WIDE_INT,
1382 enum machine_mode));
1383 extern rtx emit_copy_of_insn_after PARAMS ((rtx, rtx));
1384 extern void set_reg_attrs_from_mem PARAMS ((rtx, rtx));
1385 extern void set_mem_attrs_from_reg PARAMS ((rtx, rtx));
1386
1387 /* In rtl.c */
1388 extern rtx rtx_alloc PARAMS ((RTX_CODE));
1389 extern rtvec rtvec_alloc PARAMS ((int));
1390 extern rtx copy_rtx PARAMS ((rtx));
1391
1392 /* In emit-rtl.c */
1393 extern rtx copy_rtx_if_shared PARAMS ((rtx));
1394
1395 /* In rtl.c */
1396 extern rtx copy_most_rtx PARAMS ((rtx, rtx));
1397 extern rtx shallow_copy_rtx PARAMS ((rtx));
1398 extern int rtx_equal_p PARAMS ((rtx, rtx));
1399
1400 /* In emit-rtl.c */
1401 extern rtvec gen_rtvec_v PARAMS ((int, rtx *));
1402 extern rtx gen_reg_rtx PARAMS ((enum machine_mode));
1403 extern rtx gen_rtx_REG_offset PARAMS ((rtx, enum machine_mode,
1404 unsigned int, int));
1405 extern rtx gen_label_rtx PARAMS ((void));
1406 extern int subreg_hard_regno PARAMS ((rtx, int));
1407 extern rtx gen_lowpart_common PARAMS ((enum machine_mode, rtx));
1408 extern rtx gen_lowpart PARAMS ((enum machine_mode, rtx));
1409
1410 /* In cse.c */
1411 extern rtx gen_lowpart_if_possible PARAMS ((enum machine_mode, rtx));
1412
1413 /* In emit-rtl.c */
1414 extern rtx gen_highpart PARAMS ((enum machine_mode, rtx));
1415 extern rtx gen_highpart_mode PARAMS ((enum machine_mode,
1416 enum machine_mode, rtx));
1417 extern rtx gen_realpart PARAMS ((enum machine_mode, rtx));
1418 extern rtx gen_imagpart PARAMS ((enum machine_mode, rtx));
1419 extern rtx operand_subword PARAMS ((rtx, unsigned int, int,
1420 enum machine_mode));
1421 extern rtx constant_subword PARAMS ((rtx, int,
1422 enum machine_mode));
1423
1424 /* In emit-rtl.c */
1425 extern rtx operand_subword_force PARAMS ((rtx, unsigned int,
1426 enum machine_mode));
1427 extern int subreg_lowpart_p PARAMS ((rtx));
1428 extern unsigned int subreg_lowpart_offset PARAMS ((enum machine_mode,
1429 enum machine_mode));
1430 extern unsigned int subreg_highpart_offset PARAMS ((enum machine_mode,
1431 enum machine_mode));
1432 extern rtx make_safe_from PARAMS ((rtx, rtx));
1433 extern rtx convert_memory_address PARAMS ((enum machine_mode, rtx));
1434 extern rtx get_insns PARAMS ((void));
1435 extern const char *get_insn_name PARAMS ((int));
1436 extern rtx get_last_insn PARAMS ((void));
1437 extern rtx get_last_insn_anywhere PARAMS ((void));
1438 extern rtx get_first_nonnote_insn PARAMS ((void));
1439 extern rtx get_last_nonnote_insn PARAMS ((void));
1440 extern void start_sequence PARAMS ((void));
1441 extern void push_to_sequence PARAMS ((rtx));
1442 extern void end_sequence PARAMS ((void));
1443 extern void push_to_full_sequence PARAMS ((rtx, rtx));
1444 extern void end_full_sequence PARAMS ((rtx*, rtx*));
1445
1446 /* In varasm.c */
1447 extern rtx immed_double_const PARAMS ((HOST_WIDE_INT, HOST_WIDE_INT, enum machine_mode));
1448 extern rtx mem_for_const_double PARAMS ((rtx));
1449 extern rtx force_const_mem PARAMS ((enum machine_mode, rtx));
1450
1451 /* In varasm.c */
1452 extern rtx get_pool_constant PARAMS ((rtx));
1453 extern rtx get_pool_constant_mark PARAMS ((rtx, bool *));
1454 extern enum machine_mode get_pool_mode PARAMS ((rtx));
1455 extern rtx get_pool_constant_for_function PARAMS ((struct function *, rtx));
1456 extern enum machine_mode get_pool_mode_for_function PARAMS ((struct function *, rtx));
1457 extern int get_pool_offset PARAMS ((rtx));
1458 extern rtx simplify_subtraction PARAMS ((rtx));
1459
1460 /* In function.c */
1461 extern rtx assign_stack_local PARAMS ((enum machine_mode,
1462 HOST_WIDE_INT, int));
1463 extern rtx assign_stack_temp PARAMS ((enum machine_mode,
1464 HOST_WIDE_INT, int));
1465 extern rtx assign_stack_temp_for_type PARAMS ((enum machine_mode,
1466 HOST_WIDE_INT, int, tree));
1467 extern rtx assign_temp PARAMS ((tree, int, int, int));
1468 /* In emit-rtl.c */
1469 extern rtx emit_insn_before PARAMS ((rtx, rtx));
1470 extern rtx emit_insn_before_scope PARAMS ((rtx, rtx, tree));
1471 extern rtx emit_jump_insn_before PARAMS ((rtx, rtx));
1472 extern rtx emit_jump_insn_before_scope PARAMS ((rtx, rtx, tree));
1473 extern rtx emit_call_insn_before PARAMS ((rtx, rtx));
1474 extern rtx emit_call_insn_before_scope PARAMS ((rtx, rtx, tree));
1475 extern rtx emit_barrier_before PARAMS ((rtx));
1476 extern rtx emit_label_before PARAMS ((rtx, rtx));
1477 extern rtx emit_note_before PARAMS ((int, rtx));
1478 extern rtx emit_insn_after PARAMS ((rtx, rtx));
1479 extern rtx emit_insn_after_scope PARAMS ((rtx, rtx, tree));
1480 extern rtx emit_jump_insn_after PARAMS ((rtx, rtx));
1481 extern rtx emit_jump_insn_after_scope PARAMS ((rtx, rtx, tree));
1482 extern rtx emit_call_insn_after PARAMS ((rtx, rtx));
1483 extern rtx emit_call_insn_after_scope PARAMS ((rtx, rtx, tree));
1484 extern rtx emit_barrier_after PARAMS ((rtx));
1485 extern rtx emit_label_after PARAMS ((rtx, rtx));
1486 extern rtx emit_note_after PARAMS ((int, rtx));
1487 extern rtx emit_line_note_after PARAMS ((const char *, int, rtx));
1488 extern rtx emit_insn PARAMS ((rtx));
1489 extern rtx emit_jump_insn PARAMS ((rtx));
1490 extern rtx emit_call_insn PARAMS ((rtx));
1491 extern rtx emit_label PARAMS ((rtx));
1492 extern rtx emit_barrier PARAMS ((void));
1493 extern rtx emit_line_note PARAMS ((const char *, int));
1494 extern rtx emit_note PARAMS ((const char *, int));
1495 extern rtx emit_line_note_force PARAMS ((const char *, int));
1496 extern rtx make_insn_raw PARAMS ((rtx));
1497 extern rtx previous_insn PARAMS ((rtx));
1498 extern rtx next_insn PARAMS ((rtx));
1499 extern rtx prev_nonnote_insn PARAMS ((rtx));
1500 extern rtx next_nonnote_insn PARAMS ((rtx));
1501 extern rtx prev_real_insn PARAMS ((rtx));
1502 extern rtx next_real_insn PARAMS ((rtx));
1503 extern rtx prev_active_insn PARAMS ((rtx));
1504 extern rtx next_active_insn PARAMS ((rtx));
1505 extern int active_insn_p PARAMS ((rtx));
1506 extern rtx prev_label PARAMS ((rtx));
1507 extern rtx next_label PARAMS ((rtx));
1508 extern rtx next_cc0_user PARAMS ((rtx));
1509 extern rtx prev_cc0_setter PARAMS ((rtx));
1510
1511 /* In cfglayout.c */
1512 extern tree choose_inner_scope PARAMS ((tree, tree));
1513
1514 /* In jump.c */
1515 extern rtx next_nondeleted_insn PARAMS ((rtx));
1516 extern enum rtx_code reverse_condition PARAMS ((enum rtx_code));
1517 extern enum rtx_code reverse_condition_maybe_unordered PARAMS ((enum rtx_code));
1518 extern enum rtx_code swap_condition PARAMS ((enum rtx_code));
1519 extern enum rtx_code unsigned_condition PARAMS ((enum rtx_code));
1520 extern enum rtx_code signed_condition PARAMS ((enum rtx_code));
1521 extern void mark_jump_label PARAMS ((rtx, rtx, int));
1522 extern void cleanup_barriers PARAMS ((void));
1523
1524 /* In jump.c */
1525 extern bool squeeze_notes PARAMS ((rtx *, rtx *));
1526 extern rtx delete_related_insns PARAMS ((rtx));
1527 extern void delete_jump PARAMS ((rtx));
1528 extern void delete_barrier PARAMS ((rtx));
1529 extern rtx get_label_before PARAMS ((rtx));
1530 extern rtx get_label_after PARAMS ((rtx));
1531 extern rtx follow_jumps PARAMS ((rtx));
1532
1533 /* In recog.c */
1534 extern rtx *find_constant_term_loc PARAMS ((rtx *));
1535
1536 /* In emit-rtl.c */
1537 extern rtx try_split PARAMS ((rtx, rtx, int));
1538 extern int split_branch_probability;
1539
1540 /* In unknown file */
1541 extern rtx split_insns PARAMS ((rtx, rtx));
1542
1543 /* In simplify-rtx.c */
1544 extern rtx simplify_unary_operation PARAMS ((enum rtx_code,
1545 enum machine_mode, rtx,
1546 enum machine_mode));
1547 extern rtx simplify_binary_operation PARAMS ((enum rtx_code,
1548 enum machine_mode, rtx,
1549 rtx));
1550 extern rtx simplify_ternary_operation PARAMS ((enum rtx_code,
1551 enum machine_mode,
1552 enum machine_mode, rtx, rtx,
1553 rtx));
1554 extern rtx simplify_relational_operation PARAMS ((enum rtx_code,
1555 enum machine_mode, rtx,
1556 rtx));
1557 extern rtx simplify_gen_binary PARAMS ((enum rtx_code,
1558 enum machine_mode,
1559 rtx, rtx));
1560 extern rtx simplify_gen_unary PARAMS ((enum rtx_code,
1561 enum machine_mode, rtx,
1562 enum machine_mode));
1563 extern rtx simplify_gen_ternary PARAMS ((enum rtx_code,
1564 enum machine_mode,
1565 enum machine_mode,
1566 rtx, rtx, rtx));
1567 extern rtx simplify_gen_relational PARAMS ((enum rtx_code,
1568 enum machine_mode,
1569 enum machine_mode,
1570 rtx, rtx));
1571 extern rtx simplify_subreg PARAMS ((enum machine_mode,
1572 rtx,
1573 enum machine_mode,
1574 unsigned int));
1575 extern rtx simplify_gen_subreg PARAMS ((enum machine_mode,
1576 rtx,
1577 enum machine_mode,
1578 unsigned int));
1579 extern rtx simplify_replace_rtx PARAMS ((rtx, rtx, rtx));
1580 extern rtx simplify_rtx PARAMS ((rtx));
1581 extern rtx avoid_constant_pool_reference PARAMS ((rtx));
1582
1583 /* In function.c */
1584 extern rtx gen_mem_addressof PARAMS ((rtx, tree));
1585
1586 /* In regclass.c */
1587 extern enum machine_mode choose_hard_reg_mode PARAMS ((unsigned int,
1588 unsigned int));
1589
1590 /* In emit-rtl.c */
1591 extern rtx set_unique_reg_note PARAMS ((rtx, enum reg_note, rtx));
1592
1593 /* Functions in rtlanal.c */
1594
1595 /* Single set is implemented as macro for performance reasons. */
1596 #define single_set(I) (INSN_P (I) \
1597 ? (GET_CODE (PATTERN (I)) == SET \
1598 ? PATTERN (I) : single_set_1 (I)) \
1599 : NULL_RTX)
1600 #define single_set_1(I) single_set_2 (I, PATTERN (I))
1601
1602 extern int rtx_addr_can_trap_p PARAMS ((rtx));
1603 extern bool nonzero_address_p PARAMS ((rtx));
1604 extern int rtx_unstable_p PARAMS ((rtx));
1605 extern int rtx_varies_p PARAMS ((rtx, int));
1606 extern int rtx_addr_varies_p PARAMS ((rtx, int));
1607 extern HOST_WIDE_INT get_integer_term PARAMS ((rtx));
1608 extern rtx get_related_value PARAMS ((rtx));
1609 extern rtx get_jump_table_offset PARAMS ((rtx, rtx *));
1610 extern int global_reg_mentioned_p PARAMS ((rtx));
1611 extern int reg_mentioned_p PARAMS ((rtx, rtx));
1612 extern int count_occurrences PARAMS ((rtx, rtx, int));
1613 extern int reg_referenced_p PARAMS ((rtx, rtx));
1614 extern int reg_used_between_p PARAMS ((rtx, rtx, rtx));
1615 extern int reg_referenced_between_p PARAMS ((rtx, rtx, rtx));
1616 extern int reg_set_between_p PARAMS ((rtx, rtx, rtx));
1617 extern int regs_set_between_p PARAMS ((rtx, rtx, rtx));
1618 extern int commutative_operand_precedence PARAMS ((rtx));
1619 extern int swap_commutative_operands_p PARAMS ((rtx, rtx));
1620 extern int modified_between_p PARAMS ((rtx, rtx, rtx));
1621 extern int no_labels_between_p PARAMS ((rtx, rtx));
1622 extern int no_jumps_between_p PARAMS ((rtx, rtx));
1623 extern int modified_in_p PARAMS ((rtx, rtx));
1624 extern int insn_dependent_p PARAMS ((rtx, rtx));
1625 extern int reg_set_p PARAMS ((rtx, rtx));
1626 extern rtx single_set_2 PARAMS ((rtx, rtx));
1627 extern int multiple_sets PARAMS ((rtx));
1628 extern int set_noop_p PARAMS ((rtx));
1629 extern int noop_move_p PARAMS ((rtx));
1630 extern rtx find_last_value PARAMS ((rtx, rtx *, rtx, int));
1631 extern int refers_to_regno_p PARAMS ((unsigned int, unsigned int,
1632 rtx, rtx *));
1633 extern int reg_overlap_mentioned_p PARAMS ((rtx, rtx));
1634 extern rtx set_of PARAMS ((rtx, rtx));
1635 extern void note_stores PARAMS ((rtx,
1636 void (*) (rtx, rtx, void *),
1637 void *));
1638 extern void note_uses PARAMS ((rtx *,
1639 void (*) (rtx *, void *),
1640 void *));
1641 extern rtx reg_set_last PARAMS ((rtx, rtx));
1642 extern int dead_or_set_p PARAMS ((rtx, rtx));
1643 extern int dead_or_set_regno_p PARAMS ((rtx, unsigned int));
1644 extern rtx find_reg_note PARAMS ((rtx, enum reg_note, rtx));
1645 extern rtx find_regno_note PARAMS ((rtx, enum reg_note,
1646 unsigned int));
1647 extern rtx find_reg_equal_equiv_note PARAMS ((rtx));
1648 extern int find_reg_fusage PARAMS ((rtx, enum rtx_code, rtx));
1649 extern int find_regno_fusage PARAMS ((rtx, enum rtx_code,
1650 unsigned int));
1651 extern int pure_call_p PARAMS ((rtx));
1652 extern void remove_note PARAMS ((rtx, rtx));
1653 extern int side_effects_p PARAMS ((rtx));
1654 extern int volatile_refs_p PARAMS ((rtx));
1655 extern int volatile_insn_p PARAMS ((rtx));
1656 extern int may_trap_p PARAMS ((rtx));
1657 extern int inequality_comparisons_p PARAMS ((rtx));
1658 extern rtx replace_rtx PARAMS ((rtx, rtx, rtx));
1659 extern rtx replace_regs PARAMS ((rtx, rtx *, unsigned int,
1660 int));
1661 extern int computed_jump_p PARAMS ((rtx));
1662 typedef int (*rtx_function) PARAMS ((rtx *, void *));
1663 extern int for_each_rtx PARAMS ((rtx *, rtx_function, void *));
1664 extern rtx regno_use_in PARAMS ((unsigned int, rtx));
1665 extern int auto_inc_p PARAMS ((rtx));
1666 extern int in_expr_list_p PARAMS ((rtx, rtx));
1667 extern void remove_node_from_expr_list PARAMS ((rtx, rtx *));
1668 extern int insns_safe_to_move_p PARAMS ((rtx, rtx, rtx *));
1669 extern int loc_mentioned_in_p PARAMS ((rtx *, rtx));
1670 extern rtx find_first_parameter_load PARAMS ((rtx, rtx));
1671 extern bool keep_with_call_p PARAMS ((rtx));
1672
1673 /* flow.c */
1674
1675 extern rtx find_use_as_address PARAMS ((rtx, rtx, HOST_WIDE_INT));
1676
1677 /* lists.c */
1678
1679 void free_EXPR_LIST_list PARAMS ((rtx *));
1680 void free_INSN_LIST_list PARAMS ((rtx *));
1681 void free_EXPR_LIST_node PARAMS ((rtx));
1682 void free_INSN_LIST_node PARAMS ((rtx));
1683 rtx alloc_INSN_LIST PARAMS ((rtx, rtx));
1684 rtx alloc_EXPR_LIST PARAMS ((int, rtx, rtx));
1685
1686 /* regclass.c */
1687
1688 /* Maximum number of parallel sets and clobbers in any insn in this fn.
1689 Always at least 3, since the combiner could put that many togetherm
1690 and we want this to remain correct for all the remaining passes. */
1691
1692 extern int max_parallel;
1693
1694 /* Free up register info memory. */
1695 extern void free_reg_info PARAMS ((void));
1696
1697 /* recog.c */
1698 extern int asm_noperands PARAMS ((rtx));
1699 extern const char *decode_asm_operands PARAMS ((rtx, rtx *, rtx **,
1700 const char **,
1701 enum machine_mode *));
1702
1703 extern enum reg_class reg_preferred_class PARAMS ((int));
1704 extern enum reg_class reg_alternate_class PARAMS ((int));
1705
1706 extern rtx get_first_nonparm_insn PARAMS ((void));
1707
1708 extern void split_all_insns PARAMS ((int));
1709 extern void split_all_insns_noflow PARAMS ((void));
1710
1711 #define MAX_SAVED_CONST_INT 64
1712 extern GTY(()) rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
1713
1714 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
1715 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
1716 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
1717 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
1718 extern GTY(()) rtx const_true_rtx;
1719
1720 extern GTY(()) rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
1721
1722 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
1723 same as VOIDmode. */
1724
1725 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1726
1727 /* Likewise, for the constants 1 and 2. */
1728
1729 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1730 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
1731
1732 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1733 is used to represent the frame pointer. This is because the
1734 hard frame pointer and the automatic variables are separated by an amount
1735 that cannot be determined until after register allocation. We can assume
1736 that in this case ELIMINABLE_REGS will be defined, one action of which
1737 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1738 #ifndef HARD_FRAME_POINTER_REGNUM
1739 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1740 #endif
1741
1742 /* Index labels for global_rtl. */
1743 enum global_rtl_index
1744 {
1745 GR_PC,
1746 GR_CC0,
1747 GR_STACK_POINTER,
1748 GR_FRAME_POINTER,
1749 /* For register elimination to work properly these hard_frame_pointer_rtx,
1750 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1751 the same register. */
1752 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1753 GR_ARG_POINTER = GR_FRAME_POINTER,
1754 #endif
1755 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1756 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
1757 #else
1758 GR_HARD_FRAME_POINTER,
1759 #endif
1760 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
1761 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1762 GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
1763 #else
1764 GR_ARG_POINTER,
1765 #endif
1766 #endif
1767 GR_VIRTUAL_INCOMING_ARGS,
1768 GR_VIRTUAL_STACK_ARGS,
1769 GR_VIRTUAL_STACK_DYNAMIC,
1770 GR_VIRTUAL_OUTGOING_ARGS,
1771 GR_VIRTUAL_CFA,
1772
1773 GR_MAX
1774 };
1775
1776 /* Pointers to standard pieces of rtx are stored here. */
1777 extern GTY(()) rtx global_rtl[GR_MAX];
1778
1779 /* Standard pieces of rtx, to be substituted directly into things. */
1780 #define pc_rtx (global_rtl[GR_PC])
1781 #define cc0_rtx (global_rtl[GR_CC0])
1782
1783 /* All references to certain hard regs, except those created
1784 by allocating pseudo regs into them (when that's possible),
1785 go through these unique rtx objects. */
1786 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
1787 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
1788 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
1789 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
1790
1791 extern GTY(()) rtx pic_offset_table_rtx;
1792 extern GTY(()) rtx struct_value_rtx;
1793 extern GTY(()) rtx struct_value_incoming_rtx;
1794 extern GTY(()) rtx static_chain_rtx;
1795 extern GTY(()) rtx static_chain_incoming_rtx;
1796 extern GTY(()) rtx return_address_pointer_rtx;
1797
1798 /* Include the RTL generation functions. */
1799
1800 #ifndef NO_GENRTL_H
1801 #include "genrtl.h"
1802 #endif
1803
1804 /* There are some RTL codes that require special attention; the
1805 generation functions included above do the raw handling. If you
1806 add to this list, modify special_rtx in gengenrtl.c as well. You
1807 should also modify gen_rtx to use the special function. */
1808
1809 extern rtx gen_rtx_CONST_INT PARAMS ((enum machine_mode, HOST_WIDE_INT));
1810 extern rtx gen_rtx_CONST_VECTOR PARAMS ((enum machine_mode, rtvec));
1811 extern rtx gen_raw_REG PARAMS ((enum machine_mode, int));
1812 extern rtx gen_rtx_REG PARAMS ((enum machine_mode, unsigned));
1813 extern rtx gen_rtx_SUBREG PARAMS ((enum machine_mode, rtx, int));
1814 extern rtx gen_rtx_MEM PARAMS ((enum machine_mode, rtx));
1815
1816 extern rtx gen_lowpart_SUBREG PARAMS ((enum machine_mode, rtx));
1817
1818 /* We need the cast here to ensure that we get the same result both with
1819 and without prototypes. */
1820 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (HOST_WIDE_INT) (N))
1821
1822 /* Virtual registers are used during RTL generation to refer to locations into
1823 the stack frame when the actual location isn't known until RTL generation
1824 is complete. The routine instantiate_virtual_regs replaces these with
1825 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
1826 a constant. */
1827
1828 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
1829
1830 /* This points to the first word of the incoming arguments passed on the stack,
1831 either by the caller or by the callee when pretending it was passed by the
1832 caller. */
1833
1834 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
1835
1836 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
1837
1838 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
1839 variable on the stack. Otherwise, it points to the first variable on
1840 the stack. */
1841
1842 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
1843
1844 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
1845
1846 /* This points to the location of dynamically-allocated memory on the stack
1847 immediately after the stack pointer has been adjusted by the amount
1848 desired. */
1849
1850 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
1851
1852 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
1853
1854 /* This points to the location in the stack at which outgoing arguments should
1855 be written when the stack is pre-pushed (arguments pushed using push
1856 insns always use sp). */
1857
1858 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
1859
1860 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
1861
1862 /* This points to the Canonical Frame Address of the function. This
1863 should correspond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
1864 but is calculated relative to the arg pointer for simplicity; the
1865 frame pointer nor stack pointer are necessarily fixed relative to
1866 the CFA until after reload. */
1867
1868 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
1869
1870 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
1871
1872 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
1873
1874 /* Nonzero if REGNUM is a pointer into the stack frame. */
1875 #define REGNO_PTR_FRAME_P(REGNUM) \
1876 ((REGNUM) == STACK_POINTER_REGNUM \
1877 || (REGNUM) == FRAME_POINTER_REGNUM \
1878 || (REGNUM) == HARD_FRAME_POINTER_REGNUM \
1879 || (REGNUM) == ARG_POINTER_REGNUM \
1880 || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \
1881 && (REGNUM) <= LAST_VIRTUAL_REGISTER))
1882
1883 /* REGNUM never really appearing in the INSN stream. */
1884 #define INVALID_REGNUM (~(unsigned int) 0)
1885
1886 extern rtx find_next_ref PARAMS ((rtx, rtx));
1887
1888 extern rtx output_constant_def PARAMS ((tree, int));
1889
1890 /* Define a default value for STORE_FLAG_VALUE. */
1891
1892 #ifndef STORE_FLAG_VALUE
1893 #define STORE_FLAG_VALUE 1
1894 #endif
1895
1896 /* Nonzero after the second flow pass has completed.
1897 Set to 1 or 0 by toplev.c */
1898 extern int flow2_completed;
1899
1900 /* Nonzero after end of reload pass.
1901 Set to 1 or 0 by reload1.c. */
1902
1903 extern int reload_completed;
1904
1905 /* Set to 1 while reload_as_needed is operating.
1906 Required by some machines to handle any generated moves differently. */
1907
1908 extern int reload_in_progress;
1909
1910 /* If this is nonzero, we do not bother generating VOLATILE
1911 around volatile memory references, and we are willing to
1912 output indirect addresses. If cse is to follow, we reject
1913 indirect addresses so a useful potential cse is generated;
1914 if it is used only once, instruction combination will produce
1915 the same indirect address eventually. */
1916 extern int cse_not_expected;
1917
1918 /* Set to nonzero before life analysis to indicate that it is unsafe to
1919 generate any new pseudo registers. */
1920 extern int no_new_pseudos;
1921
1922 /* Translates rtx code to tree code, for those codes needed by
1923 REAL_ARITHMETIC. The function returns an int because the caller may not
1924 know what `enum tree_code' means. */
1925
1926 extern int rtx_to_tree_code PARAMS ((enum rtx_code));
1927
1928 /* In tree.c */
1929 struct obstack;
1930 extern void gcc_obstack_init PARAMS ((struct obstack *));
1931
1932 /* In cse.c */
1933 struct cse_basic_block_data;
1934
1935 /* Return the right cost to give to an operation
1936 to make the cost of the corresponding register-to-register instruction
1937 N times that of a fast register-to-register instruction. */
1938 #define COSTS_N_INSNS(N) ((N) * 4)
1939
1940 /* Maximum cost of a rtl expression. This value has the special meaning
1941 not to use an rtx with this cost under any circumstances. */
1942 #define MAX_COST INT_MAX
1943
1944 extern int rtx_cost PARAMS ((rtx, enum rtx_code));
1945 extern int address_cost PARAMS ((rtx, enum machine_mode));
1946 extern int delete_trivially_dead_insns PARAMS ((rtx, int));
1947 #ifdef BUFSIZ
1948 extern int cse_main PARAMS ((rtx, int, int, FILE *));
1949 #endif
1950 extern void cse_end_of_basic_block PARAMS ((rtx,
1951 struct cse_basic_block_data *,
1952 int, int, int));
1953
1954 /* In jump.c */
1955 extern int comparison_dominates_p PARAMS ((enum rtx_code, enum rtx_code));
1956 extern int condjump_p PARAMS ((rtx));
1957 extern int any_condjump_p PARAMS ((rtx));
1958 extern int any_uncondjump_p PARAMS ((rtx));
1959 extern int safe_to_remove_jump_p PARAMS ((rtx));
1960 extern rtx pc_set PARAMS ((rtx));
1961 extern rtx condjump_label PARAMS ((rtx));
1962 extern int simplejump_p PARAMS ((rtx));
1963 extern int returnjump_p PARAMS ((rtx));
1964 extern int onlyjump_p PARAMS ((rtx));
1965 extern int only_sets_cc0_p PARAMS ((rtx));
1966 extern int sets_cc0_p PARAMS ((rtx));
1967 extern int invert_jump_1 PARAMS ((rtx, rtx));
1968 extern int invert_jump PARAMS ((rtx, rtx, int));
1969 extern int rtx_renumbered_equal_p PARAMS ((rtx, rtx));
1970 extern int true_regnum PARAMS ((rtx));
1971 extern unsigned int reg_or_subregno PARAMS ((rtx));
1972 extern int redirect_jump_1 PARAMS ((rtx, rtx));
1973 extern int redirect_jump PARAMS ((rtx, rtx, int));
1974 extern void rebuild_jump_labels PARAMS ((rtx));
1975 extern enum rtx_code reversed_comparison_code PARAMS ((rtx, rtx));
1976 extern enum rtx_code reversed_comparison_code_parts PARAMS ((enum rtx_code,
1977 rtx, rtx, rtx));
1978 extern void delete_for_peephole PARAMS ((rtx, rtx));
1979 extern int condjump_in_parallel_p PARAMS ((rtx));
1980 extern void never_reached_warning PARAMS ((rtx, rtx));
1981 extern void purge_line_number_notes PARAMS ((rtx));
1982 extern void copy_loop_headers PARAMS ((rtx));
1983
1984 /* In emit-rtl.c. */
1985 extern int max_reg_num PARAMS ((void));
1986 extern int max_label_num PARAMS ((void));
1987 extern int get_first_label_num PARAMS ((void));
1988 extern void delete_insns_since PARAMS ((rtx));
1989 extern void mark_reg_pointer PARAMS ((rtx, int));
1990 extern void mark_user_reg PARAMS ((rtx));
1991 extern void reset_used_flags PARAMS ((rtx));
1992 extern void reorder_insns PARAMS ((rtx, rtx, rtx));
1993 extern void reorder_insns_nobb PARAMS ((rtx, rtx, rtx));
1994 extern int get_max_uid PARAMS ((void));
1995 extern int in_sequence_p PARAMS ((void));
1996 extern void force_next_line_note PARAMS ((void));
1997 extern void init_emit PARAMS ((void));
1998 extern void init_emit_once PARAMS ((int));
1999 extern void push_topmost_sequence PARAMS ((void));
2000 extern void pop_topmost_sequence PARAMS ((void));
2001 extern int subreg_realpart_p PARAMS ((rtx));
2002 extern void reverse_comparison PARAMS ((rtx));
2003 extern void set_new_first_and_last_insn PARAMS ((rtx, rtx));
2004 extern void set_new_first_and_last_label_num PARAMS ((int, int));
2005 extern void set_new_last_label_num PARAMS ((int));
2006 extern void unshare_all_rtl_again PARAMS ((rtx));
2007 extern void set_first_insn PARAMS ((rtx));
2008 extern void set_last_insn PARAMS ((rtx));
2009 extern void link_cc0_insns PARAMS ((rtx));
2010 extern void add_insn PARAMS ((rtx));
2011 extern void add_insn_before PARAMS ((rtx, rtx));
2012 extern void add_insn_after PARAMS ((rtx, rtx));
2013 extern void remove_insn PARAMS ((rtx));
2014 extern void reorder_insns_with_line_notes PARAMS ((rtx, rtx, rtx));
2015 extern void emit_insn_after_with_line_notes PARAMS ((rtx, rtx, rtx));
2016 extern enum rtx_code classify_insn PARAMS ((rtx));
2017 extern rtx emit PARAMS ((rtx));
2018 /* Query and clear/ restore no_line_numbers. This is used by the
2019 switch / case handling in stmt.c to give proper line numbers in
2020 warnings about unreachable code. */
2021 int force_line_numbers PARAMS ((void));
2022 void restore_line_number_status PARAMS ((int old_value));
2023 extern void renumber_insns PARAMS ((FILE *));
2024 extern void remove_unnecessary_notes PARAMS ((void));
2025 extern rtx delete_insn PARAMS ((rtx));
2026 extern void delete_insn_chain PARAMS ((rtx, rtx));
2027 extern rtx delete_insn_and_edges PARAMS ((rtx));
2028 extern void delete_insn_chain_and_edges PARAMS ((rtx, rtx));
2029
2030 /* In combine.c */
2031 extern int combine_instructions PARAMS ((rtx, unsigned int));
2032 extern unsigned int extended_count PARAMS ((rtx, enum machine_mode, int));
2033 extern rtx remove_death PARAMS ((unsigned int, rtx));
2034 #ifdef BUFSIZ
2035 extern void dump_combine_stats PARAMS ((FILE *));
2036 extern void dump_combine_total_stats PARAMS ((FILE *));
2037 #endif
2038
2039 /* In sched.c. */
2040 #ifdef BUFSIZ
2041 extern void schedule_insns PARAMS ((FILE *));
2042 extern void schedule_ebbs PARAMS ((FILE *));
2043 #endif
2044 extern void fix_sched_param PARAMS ((const char *, const char *));
2045
2046 /* In print-rtl.c */
2047 extern const char *print_rtx_head;
2048 extern void debug_rtx PARAMS ((rtx));
2049 extern void debug_rtx_list PARAMS ((rtx, int));
2050 extern void debug_rtx_range PARAMS ((rtx, rtx));
2051 extern rtx debug_rtx_find PARAMS ((rtx, int));
2052 #ifdef BUFSIZ
2053 extern void print_mem_expr PARAMS ((FILE *, tree));
2054 extern void print_rtl PARAMS ((FILE *, rtx));
2055 extern void print_simple_rtl PARAMS ((FILE *, rtx));
2056 extern int print_rtl_single PARAMS ((FILE *, rtx));
2057 extern void print_inline_rtx PARAMS ((FILE *, rtx, int));
2058 #endif
2059
2060 /* In loop.c */
2061 extern void init_loop PARAMS ((void));
2062 extern rtx libcall_other_reg PARAMS ((rtx, rtx));
2063 #ifdef BUFSIZ
2064 extern void loop_optimize PARAMS ((rtx, FILE *, int));
2065 #endif
2066 extern void record_excess_regs PARAMS ((rtx, rtx, rtx *));
2067
2068 /* In function.c */
2069 extern void reposition_prologue_and_epilogue_notes PARAMS ((rtx));
2070 extern void thread_prologue_and_epilogue_insns PARAMS ((rtx));
2071 extern int prologue_epilogue_contains PARAMS ((rtx));
2072 extern int sibcall_epilogue_contains PARAMS ((rtx));
2073 extern void preserve_rtl_expr_result PARAMS ((rtx));
2074 extern void mark_temp_addr_taken PARAMS ((rtx));
2075 extern void update_temp_slot_address PARAMS ((rtx, rtx));
2076 extern void purge_addressof PARAMS ((rtx));
2077 extern void purge_hard_subreg_sets PARAMS ((rtx));
2078
2079 /* In stmt.c */
2080 extern void set_file_and_line_for_stmt PARAMS ((const char *, int));
2081 extern void expand_null_return PARAMS ((void));
2082 extern void emit_jump PARAMS ((rtx));
2083 extern int preserve_subexpressions_p PARAMS ((void));
2084
2085 /* In expr.c */
2086 extern void move_by_pieces PARAMS ((rtx, rtx,
2087 unsigned HOST_WIDE_INT,
2088 unsigned int));
2089
2090 /* In flow.c */
2091 extern void recompute_reg_usage PARAMS ((rtx, int));
2092 extern int initialize_uninitialized_subregs PARAMS ((void));
2093 extern void delete_dead_jumptables PARAMS ((void));
2094 #ifdef BUFSIZ
2095 extern void print_rtl_with_bb PARAMS ((FILE *, rtx));
2096 extern void dump_flow_info PARAMS ((FILE *));
2097 #endif
2098
2099 /* In expmed.c */
2100 extern void init_expmed PARAMS ((void));
2101 extern void expand_inc PARAMS ((rtx, rtx));
2102 extern void expand_dec PARAMS ((rtx, rtx));
2103 extern rtx expand_mult_highpart PARAMS ((enum machine_mode, rtx,
2104 unsigned HOST_WIDE_INT, rtx,
2105 int, int));
2106
2107 /* In gcse.c */
2108 #ifdef BUFSIZ
2109 extern int gcse_main PARAMS ((rtx, FILE *));
2110 extern int bypass_jumps PARAMS ((FILE *));
2111 #endif
2112
2113 /* In global.c */
2114 extern void mark_elimination PARAMS ((int, int));
2115 #ifdef BUFSIZ
2116 extern int global_alloc PARAMS ((FILE *));
2117 extern void dump_global_regs PARAMS ((FILE *));
2118 #endif
2119 #ifdef HARD_CONST
2120 /* Yes, this ifdef is silly, but HARD_REG_SET is not always defined. */
2121 extern void retry_global_alloc PARAMS ((int, HARD_REG_SET));
2122 #endif
2123 extern void build_insn_chain PARAMS ((rtx));
2124
2125 /* In regclass.c */
2126 extern int reg_classes_intersect_p PARAMS ((enum reg_class, enum reg_class));
2127 extern int reg_class_subset_p PARAMS ((enum reg_class, enum reg_class));
2128 extern void globalize_reg PARAMS ((int));
2129 extern void init_regs PARAMS ((void));
2130 extern void init_fake_stack_mems PARAMS ((void));
2131 extern void init_reg_sets PARAMS ((void));
2132 extern void regset_release_memory PARAMS ((void));
2133 extern void regclass_init PARAMS ((void));
2134 extern void regclass PARAMS ((rtx, int, FILE *));
2135 extern void reg_scan PARAMS ((rtx, unsigned int, int));
2136 extern void reg_scan_update PARAMS ((rtx, rtx, unsigned int));
2137 extern void fix_register PARAMS ((const char *, int, int));
2138 #ifdef HARD_CONST
2139 extern void cannot_change_mode_set_regs PARAMS ((HARD_REG_SET *,
2140 enum machine_mode,
2141 unsigned int));
2142 #endif
2143 extern bool invalid_mode_change_p PARAMS ((unsigned int,
2144 enum reg_class,
2145 enum machine_mode));
2146
2147 extern int delete_null_pointer_checks PARAMS ((rtx));
2148
2149 /* In regmove.c */
2150 #ifdef BUFSIZ
2151 extern void regmove_optimize PARAMS ((rtx, int, FILE *));
2152 #endif
2153 extern void combine_stack_adjustments PARAMS ((void));
2154
2155 /* In reorg.c */
2156 #ifdef BUFSIZ
2157 extern void dbr_schedule PARAMS ((rtx, FILE *));
2158 #endif
2159
2160 /* In local-alloc.c */
2161 #ifdef BUFSIZ
2162 extern void dump_local_alloc PARAMS ((FILE *));
2163 #endif
2164 extern int local_alloc PARAMS ((void));
2165 extern int function_invariant_p PARAMS ((rtx));
2166
2167 /* In profile.c */
2168 extern void init_branch_prob PARAMS ((const char *));
2169 extern void branch_prob PARAMS ((void));
2170 extern void end_branch_prob PARAMS ((void));
2171 extern void create_profiler PARAMS ((void));
2172
2173 /* In reg-stack.c */
2174 #ifdef BUFSIZ
2175 extern void reg_to_stack PARAMS ((rtx, FILE *));
2176 #endif
2177
2178 /* In fold-const.c */
2179 extern int add_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2180 unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2181 unsigned HOST_WIDE_INT *,
2182 HOST_WIDE_INT *));
2183 extern int neg_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2184 unsigned HOST_WIDE_INT *,
2185 HOST_WIDE_INT *));
2186 extern int mul_double PARAMS ((unsigned HOST_WIDE_INT,
2187 HOST_WIDE_INT,
2188 unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2189 unsigned HOST_WIDE_INT *,
2190 HOST_WIDE_INT *));
2191 extern void lshift_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2192 HOST_WIDE_INT, unsigned int,
2193 unsigned HOST_WIDE_INT *,
2194 HOST_WIDE_INT *, int));
2195 extern void rshift_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2196 HOST_WIDE_INT, unsigned int,
2197 unsigned HOST_WIDE_INT *,
2198 HOST_WIDE_INT *, int));
2199 extern void lrotate_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2200 HOST_WIDE_INT, unsigned int,
2201 unsigned HOST_WIDE_INT *,
2202 HOST_WIDE_INT *));
2203 extern void rrotate_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2204 HOST_WIDE_INT, unsigned int,
2205 unsigned HOST_WIDE_INT *,
2206 HOST_WIDE_INT *));
2207
2208 /* In calls.c */
2209 enum libcall_type
2210 {
2211 LCT_NORMAL = 0,
2212 LCT_CONST = 1,
2213 LCT_PURE = 2,
2214 LCT_CONST_MAKE_BLOCK = 3,
2215 LCT_PURE_MAKE_BLOCK = 4,
2216 LCT_NORETURN = 5,
2217 LCT_THROW = 6,
2218 LCT_ALWAYS_RETURN = 7,
2219 LCT_RETURNS_TWICE = 8
2220 };
2221
2222 extern void emit_library_call PARAMS ((rtx, enum libcall_type,
2223 enum machine_mode, int,
2224 ...));
2225 extern rtx emit_library_call_value PARAMS ((rtx, rtx, enum libcall_type,
2226 enum machine_mode, int,
2227 ...));
2228
2229 /* In unroll.c */
2230 extern int set_dominates_use PARAMS ((int, int, int, rtx, rtx));
2231
2232 /* In varasm.c */
2233 extern int in_data_section PARAMS ((void));
2234 extern void init_varasm_once PARAMS ((void));
2235
2236 /* In rtl.c */
2237 extern void init_rtl PARAMS ((void));
2238 extern void traverse_md_constants PARAMS ((int (*) (void **, void *),
2239 void *));
2240 struct md_constant { char *name, *value; };
2241
2242 #ifdef BUFSIZ
2243 extern int read_skip_spaces PARAMS ((FILE *));
2244 extern rtx read_rtx PARAMS ((FILE *));
2245 #endif
2246
2247 extern const char *read_rtx_filename;
2248 extern int read_rtx_lineno;
2249
2250 /* Redefine abort to report an internal error w/o coredump, and
2251 reporting the location of the error in the source file. This logic
2252 is duplicated in rtl.h and tree.h because every file that needs the
2253 special abort includes one or both. toplev.h gets too few files,
2254 system.h gets too many. */
2255
2256 extern void fancy_abort PARAMS ((const char *, int, const char *))
2257 ATTRIBUTE_NORETURN;
2258 #define abort() fancy_abort (__FILE__, __LINE__, __FUNCTION__)
2259
2260 /* In alias.c */
2261 extern void clear_reg_alias_info PARAMS ((rtx));
2262 extern rtx canon_rtx PARAMS ((rtx));
2263 extern int true_dependence PARAMS ((rtx, enum machine_mode, rtx,
2264 int (*)(rtx, int)));
2265 extern rtx get_addr PARAMS ((rtx));
2266 extern int canon_true_dependence PARAMS ((rtx, enum machine_mode, rtx,
2267 rtx, int (*)(rtx, int)));
2268 extern int read_dependence PARAMS ((rtx, rtx));
2269 extern int anti_dependence PARAMS ((rtx, rtx));
2270 extern int output_dependence PARAMS ((rtx, rtx));
2271 extern void mark_constant_function PARAMS ((void));
2272 extern void init_alias_once PARAMS ((void));
2273 extern void init_alias_analysis PARAMS ((void));
2274 extern void end_alias_analysis PARAMS ((void));
2275 extern rtx addr_side_effect_eval PARAMS ((rtx, int, int));
2276 extern bool memory_modified_in_insn_p PARAMS ((rtx, rtx));
2277
2278 /* In sibcall.c */
2279 typedef enum {
2280 sibcall_use_normal = 1,
2281 sibcall_use_tail_recursion,
2282 sibcall_use_sibcall
2283 } sibcall_use_t;
2284
2285 extern void optimize_sibling_and_tail_recursive_calls PARAMS ((void));
2286 extern void replace_call_placeholder PARAMS ((rtx, sibcall_use_t));
2287
2288 #ifdef STACK_REGS
2289 extern int stack_regs_mentioned PARAMS ((rtx insn));
2290 #endif
2291
2292 /* In toplev.c */
2293 extern GTY(()) rtx stack_limit_rtx;
2294
2295 /* In regrename.c */
2296 extern void regrename_optimize PARAMS ((void));
2297 extern void copyprop_hardreg_forward PARAMS ((void));
2298
2299 /* In ifcvt.c */
2300 extern void if_convert PARAMS ((int));
2301
2302 /* In predict.c */
2303 extern void invert_br_probabilities PARAMS ((rtx));
2304 extern bool expensive_function_p PARAMS ((int));
2305 /* In tracer.c */
2306 extern void tracer PARAMS ((void));
2307
2308 /* In calls.c */
2309
2310 /* Nonzero if this is a call to a `const' function. */
2311 #define ECF_CONST 1
2312 /* Nonzero if this is a call to a `volatile' function. */
2313 #define ECF_NORETURN 2
2314 /* Nonzero if this is a call to malloc or a related function. */
2315 #define ECF_MALLOC 4
2316 /* Nonzero if it is plausible that this is a call to alloca. */
2317 #define ECF_MAY_BE_ALLOCA 8
2318 /* Nonzero if this is a call to a function that won't throw an exception. */
2319 #define ECF_NOTHROW 16
2320 /* Nonzero if this is a call to setjmp or a related function. */
2321 #define ECF_RETURNS_TWICE 32
2322 /* Nonzero if this is a call to `longjmp'. */
2323 #define ECF_LONGJMP 64
2324 /* Nonzero if this is a syscall that makes a new process in the image of
2325 the current one. */
2326 #define ECF_FORK_OR_EXEC 128
2327 #define ECF_SIBCALL 256
2328 /* Nonzero if this is a call to "pure" function (like const function,
2329 but may read memory. */
2330 #define ECF_PURE 512
2331 /* Nonzero if this is a call to a function that returns with the stack
2332 pointer depressed. */
2333 #define ECF_SP_DEPRESSED 1024
2334 /* Nonzero if this call is known to always return. */
2335 #define ECF_ALWAYS_RETURN 2048
2336 /* Create libcall block around the call. */
2337 #define ECF_LIBCALL_BLOCK 4096
2338
2339 extern int flags_from_decl_or_type PARAMS ((tree));
2340
2341 #endif /* ! GCC_RTL_H */