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78528714 | 1 | /* Exported functions from emit-rtl.c |
818ab71a | 2 | Copyright (C) 2004-2016 Free Software Foundation, Inc. |
78528714 JQ |
3 | |
4 | This file is part of GCC. | |
5 | ||
6 | GCC is free software; you can redistribute it and/or modify it under | |
7 | the terms of the GNU General Public License as published by the Free | |
9dcd6f09 | 8 | Software Foundation; either version 3, or (at your option) any later |
78528714 JQ |
9 | version. |
10 | ||
11 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
12 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
14 | for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
9dcd6f09 NC |
17 | along with GCC; see the file COPYING3. If not see |
18 | <http://www.gnu.org/licenses/>. */ | |
78528714 JQ |
19 | |
20 | #ifndef GCC_EMIT_RTL_H | |
21 | #define GCC_EMIT_RTL_H | |
22 | ||
2bb8cb58 AM |
23 | struct temp_slot; |
24 | typedef struct temp_slot *temp_slot_p; | |
25 | ||
16a16ec7 AM |
26 | /* Information mainlined about RTL representation of incoming arguments. */ |
27 | struct GTY(()) incoming_args { | |
28 | /* Number of bytes of args popped by function being compiled on its return. | |
29 | Zero if no bytes are to be popped. | |
30 | May affect compilation of return insn or of function epilogue. */ | |
31 | int pops_args; | |
32 | ||
33 | /* If function's args have a fixed size, this is that size, in bytes. | |
34 | Otherwise, it is -1. | |
35 | May affect compilation of return insn or of function epilogue. */ | |
36 | int size; | |
37 | ||
38 | /* # bytes the prologue should push and pretend that the caller pushed them. | |
39 | The prologue must do this, but only if parms can be passed in | |
40 | registers. */ | |
41 | int pretend_args_size; | |
42 | ||
43 | /* This is the offset from the arg pointer to the place where the first | |
44 | anonymous arg can be found, if there is one. */ | |
45 | rtx arg_offset_rtx; | |
46 | ||
47 | /* Quantities of various kinds of registers | |
48 | used for the current function's args. */ | |
49 | CUMULATIVE_ARGS info; | |
50 | ||
51 | /* The arg pointer hard register, or the pseudo into which it was copied. */ | |
52 | rtx internal_arg_pointer; | |
53 | }; | |
54 | ||
55 | ||
2bb8cb58 AM |
56 | /* Datastructures maintained for currently processed function in RTL form. */ |
57 | struct GTY(()) rtl_data { | |
58 | struct expr_status expr; | |
59 | struct emit_status emit; | |
60 | struct varasm_status varasm; | |
61 | struct incoming_args args; | |
62 | struct function_subsections subsections; | |
63 | struct rtl_eh eh; | |
64 | ||
65 | /* For function.c */ | |
66 | ||
67 | /* # of bytes of outgoing arguments. If ACCUMULATE_OUTGOING_ARGS is | |
68 | defined, the needed space is pushed by the prologue. */ | |
69 | int outgoing_args_size; | |
70 | ||
71 | /* If nonzero, an RTL expression for the location at which the current | |
72 | function returns its result. If the current function returns its | |
73 | result in a register, current_function_return_rtx will always be | |
74 | the hard register containing the result. */ | |
75 | rtx return_rtx; | |
76 | /* If nonxero, an RTL expression for the lcoation at which the current | |
77 | function returns bounds for its result. */ | |
78 | rtx return_bnd; | |
79 | ||
80 | /* Vector of initial-value pairs. Each pair consists of a pseudo | |
81 | register of approprite mode that stores the initial value a hard | |
82 | register REGNO, and that hard register itself. */ | |
83 | /* ??? This could be a VEC but there is currently no way to define an | |
84 | opaque VEC type. */ | |
85 | struct initial_value_struct *hard_reg_initial_vals; | |
86 | ||
87 | /* A variable living at the top of the frame that holds a known value. | |
88 | Used for detecting stack clobbers. */ | |
89 | tree stack_protect_guard; | |
90 | ||
91 | /* List (chain of INSN_LIST) of labels heading the current handlers for | |
92 | nonlocal gotos. */ | |
93 | rtx_insn_list *x_nonlocal_goto_handler_labels; | |
94 | ||
95 | /* Label that will go on function epilogue. | |
96 | Jumping to this label serves as a "return" instruction | |
97 | on machines which require execution of the epilogue on all returns. */ | |
98 | rtx_code_label *x_return_label; | |
99 | ||
100 | /* Label that will go on the end of function epilogue. | |
101 | Jumping to this label serves as a "naked return" instruction | |
102 | on machines which require execution of the epilogue on all returns. */ | |
103 | rtx_code_label *x_naked_return_label; | |
104 | ||
105 | /* List (chain of EXPR_LISTs) of all stack slots in this function. | |
106 | Made for the sake of unshare_all_rtl. */ | |
107 | rtx_expr_list *x_stack_slot_list; | |
108 | ||
109 | /* List of empty areas in the stack frame. */ | |
110 | struct frame_space *frame_space_list; | |
111 | ||
112 | /* Place after which to insert the tail_recursion_label if we need one. */ | |
113 | rtx_note *x_stack_check_probe_note; | |
114 | ||
115 | /* Location at which to save the argument pointer if it will need to be | |
116 | referenced. There are two cases where this is done: if nonlocal gotos | |
117 | exist, or if vars stored at an offset from the argument pointer will be | |
118 | needed by inner routines. */ | |
119 | rtx x_arg_pointer_save_area; | |
120 | ||
121 | /* Dynamic Realign Argument Pointer used for realigning stack. */ | |
122 | rtx drap_reg; | |
123 | ||
124 | /* Offset to end of allocated area of stack frame. | |
125 | If stack grows down, this is the address of the last stack slot allocated. | |
126 | If stack grows up, this is the address for the next slot. */ | |
127 | HOST_WIDE_INT x_frame_offset; | |
128 | ||
129 | /* Insn after which register parms and SAVE_EXPRs are born, if nonopt. */ | |
130 | rtx_insn *x_parm_birth_insn; | |
131 | ||
132 | /* List of all used temporaries allocated, by level. */ | |
133 | vec<temp_slot_p, va_gc> *x_used_temp_slots; | |
134 | ||
135 | /* List of available temp slots. */ | |
136 | struct temp_slot *x_avail_temp_slots; | |
137 | ||
138 | /* Current nesting level for temporaries. */ | |
139 | int x_temp_slot_level; | |
140 | ||
141 | /* The largest alignment needed on the stack, including requirement | |
142 | for outgoing stack alignment. */ | |
143 | unsigned int stack_alignment_needed; | |
144 | ||
145 | /* Preferred alignment of the end of stack frame, which is preferred | |
146 | to call other functions. */ | |
147 | unsigned int preferred_stack_boundary; | |
148 | ||
149 | /* The minimum alignment of parameter stack. */ | |
150 | unsigned int parm_stack_boundary; | |
151 | ||
152 | /* The largest alignment of slot allocated on the stack. */ | |
153 | unsigned int max_used_stack_slot_alignment; | |
154 | ||
155 | /* The stack alignment estimated before reload, with consideration of | |
156 | following factors: | |
157 | 1. Alignment of local stack variables (max_used_stack_slot_alignment) | |
158 | 2. Alignment requirement to call other functions | |
159 | (preferred_stack_boundary) | |
160 | 3. Alignment of non-local stack variables but might be spilled in | |
161 | local stack. */ | |
162 | unsigned int stack_alignment_estimated; | |
163 | ||
164 | /* For reorg. */ | |
165 | ||
166 | /* Nonzero if function being compiled called builtin_return_addr or | |
167 | builtin_frame_address with nonzero count. */ | |
168 | bool accesses_prior_frames; | |
169 | ||
170 | /* Nonzero if the function calls __builtin_eh_return. */ | |
171 | bool calls_eh_return; | |
172 | ||
173 | /* Nonzero if function saves all registers, e.g. if it has a nonlocal | |
174 | label that can reach the exit block via non-exceptional paths. */ | |
175 | bool saves_all_registers; | |
176 | ||
177 | /* Nonzero if function being compiled has nonlocal gotos to parent | |
178 | function. */ | |
179 | bool has_nonlocal_goto; | |
180 | ||
181 | /* Nonzero if function being compiled has an asm statement. */ | |
182 | bool has_asm_statement; | |
183 | ||
184 | /* This bit is used by the exception handling logic. It is set if all | |
185 | calls (if any) are sibling calls. Such functions do not have to | |
186 | have EH tables generated, as they cannot throw. A call to such a | |
187 | function, however, should be treated as throwing if any of its callees | |
188 | can throw. */ | |
189 | bool all_throwers_are_sibcalls; | |
190 | ||
191 | /* Nonzero if stack limit checking should be enabled in the current | |
192 | function. */ | |
193 | bool limit_stack; | |
194 | ||
195 | /* Nonzero if profiling code should be generated. */ | |
196 | bool profile; | |
197 | ||
198 | /* Nonzero if the current function uses the constant pool. */ | |
199 | bool uses_const_pool; | |
200 | ||
201 | /* Nonzero if the current function uses pic_offset_table_rtx. */ | |
202 | bool uses_pic_offset_table; | |
203 | ||
204 | /* Nonzero if the current function needs an lsda for exception handling. */ | |
205 | bool uses_eh_lsda; | |
206 | ||
207 | /* Set when the tail call has been produced. */ | |
208 | bool tail_call_emit; | |
209 | ||
210 | /* Nonzero if code to initialize arg_pointer_save_area has been emitted. */ | |
211 | bool arg_pointer_save_area_init; | |
212 | ||
213 | /* Nonzero if current function must be given a frame pointer. | |
214 | Set in reload1.c or lra-eliminations.c if anything is allocated | |
215 | on the stack there. */ | |
216 | bool frame_pointer_needed; | |
217 | ||
218 | /* When set, expand should optimize for speed. */ | |
219 | bool maybe_hot_insn_p; | |
220 | ||
221 | /* Nonzero if function stack realignment is needed. This flag may be | |
222 | set twice: before and after reload. It is set before reload wrt | |
223 | stack alignment estimation before reload. It will be changed after | |
224 | reload if by then criteria of stack realignment is different. | |
225 | The value set after reload is the accurate one and is finalized. */ | |
226 | bool stack_realign_needed; | |
227 | ||
228 | /* Nonzero if function stack realignment is tried. This flag is set | |
229 | only once before reload. It affects register elimination. This | |
230 | is used to generate DWARF debug info for stack variables. */ | |
231 | bool stack_realign_tried; | |
232 | ||
233 | /* Nonzero if function being compiled needs dynamic realigned | |
234 | argument pointer (drap) if stack needs realigning. */ | |
235 | bool need_drap; | |
236 | ||
237 | /* Nonzero if function stack realignment estimation is done, namely | |
238 | stack_realign_needed flag has been set before reload wrt estimated | |
239 | stack alignment info. */ | |
240 | bool stack_realign_processed; | |
241 | ||
242 | /* Nonzero if function stack realignment has been finalized, namely | |
243 | stack_realign_needed flag has been set and finalized after reload. */ | |
244 | bool stack_realign_finalized; | |
245 | ||
246 | /* True if dbr_schedule has already been called for this function. */ | |
247 | bool dbr_scheduled_p; | |
248 | ||
249 | /* True if current function can not throw. Unlike | |
250 | TREE_NOTHROW (current_function_decl) it is set even for overwritable | |
251 | function where currently compiled version of it is nothrow. */ | |
252 | bool nothrow; | |
253 | ||
254 | /* True if we performed shrink-wrapping for the current function. */ | |
255 | bool shrink_wrapped; | |
256 | ||
257 | /* Nonzero if function being compiled doesn't modify the stack pointer | |
258 | (ignoring the prologue and epilogue). This is only valid after | |
259 | pass_stack_ptr_mod has run. */ | |
260 | bool sp_is_unchanging; | |
261 | ||
262 | /* Nonzero if function being compiled doesn't contain any calls | |
263 | (ignoring the prologue and epilogue). This is set prior to | |
264 | local register allocation and is valid for the remaining | |
265 | compiler passes. */ | |
266 | bool is_leaf; | |
267 | ||
268 | /* Nonzero if the function being compiled is a leaf function which only | |
269 | uses leaf registers. This is valid after reload (specifically after | |
270 | sched2) and is useful only if the port defines LEAF_REGISTERS. */ | |
271 | bool uses_only_leaf_regs; | |
272 | ||
273 | /* Nonzero if the function being compiled has undergone hot/cold partitioning | |
274 | (under flag_reorder_blocks_and_partition) and has at least one cold | |
275 | block. */ | |
276 | bool has_bb_partition; | |
277 | ||
278 | /* Nonzero if the function being compiled has completed the bb reordering | |
279 | pass. */ | |
280 | bool bb_reorder_complete; | |
281 | ||
282 | /* Like regs_ever_live, but 1 if a reg is set or clobbered from an | |
283 | asm. Unlike regs_ever_live, elements of this array corresponding | |
284 | to eliminable regs (like the frame pointer) are set if an asm | |
285 | sets them. */ | |
286 | HARD_REG_SET asm_clobbers; | |
287 | }; | |
288 | ||
289 | #define return_label (crtl->x_return_label) | |
290 | #define naked_return_label (crtl->x_naked_return_label) | |
291 | #define stack_slot_list (crtl->x_stack_slot_list) | |
292 | #define parm_birth_insn (crtl->x_parm_birth_insn) | |
293 | #define frame_offset (crtl->x_frame_offset) | |
294 | #define stack_check_probe_note (crtl->x_stack_check_probe_note) | |
295 | #define arg_pointer_save_area (crtl->x_arg_pointer_save_area) | |
296 | #define used_temp_slots (crtl->x_used_temp_slots) | |
297 | #define avail_temp_slots (crtl->x_avail_temp_slots) | |
298 | #define temp_slot_level (crtl->x_temp_slot_level) | |
299 | #define nonlocal_goto_handler_labels (crtl->x_nonlocal_goto_handler_labels) | |
300 | #define frame_pointer_needed (crtl->frame_pointer_needed) | |
301 | #define stack_realign_fp (crtl->stack_realign_needed && !crtl->need_drap) | |
302 | #define stack_realign_drap (crtl->stack_realign_needed && crtl->need_drap) | |
303 | ||
304 | extern GTY(()) struct rtl_data x_rtl; | |
305 | ||
306 | /* Accessor to RTL datastructures. We keep them statically allocated now since | |
307 | we never keep multiple functions. For threaded compiler we might however | |
308 | want to do differently. */ | |
309 | #define crtl (&x_rtl) | |
310 | ||
96b3c03f RB |
311 | /* Return whether two MEM_ATTRs are equal. */ |
312 | bool mem_attrs_eq_p (const struct mem_attrs *, const struct mem_attrs *); | |
313 | ||
78528714 | 314 | /* Set the alias set of MEM to SET. */ |
4862826d | 315 | extern void set_mem_alias_set (rtx, alias_set_type); |
78528714 JQ |
316 | |
317 | /* Set the alignment of MEM to ALIGN bits. */ | |
318 | extern void set_mem_align (rtx, unsigned int); | |
319 | ||
09e881c9 BE |
320 | /* Set the address space of MEM to ADDRSPACE. */ |
321 | extern void set_mem_addr_space (rtx, addr_space_t); | |
322 | ||
78528714 JQ |
323 | /* Set the expr for MEM to EXPR. */ |
324 | extern void set_mem_expr (rtx, tree); | |
325 | ||
326 | /* Set the offset for MEM to OFFSET. */ | |
527210c4 RS |
327 | extern void set_mem_offset (rtx, HOST_WIDE_INT); |
328 | ||
329 | /* Clear the offset recorded for MEM. */ | |
330 | extern void clear_mem_offset (rtx); | |
78528714 JQ |
331 | |
332 | /* Set the size for MEM to SIZE. */ | |
f5541398 RS |
333 | extern void set_mem_size (rtx, HOST_WIDE_INT); |
334 | ||
335 | /* Clear the size recorded for MEM. */ | |
336 | extern void clear_mem_size (rtx); | |
78528714 | 337 | |
f6129d66 RH |
338 | /* Set the attributes for MEM appropriate for a spill slot. */ |
339 | extern void set_mem_attrs_for_spill (rtx); | |
3d7e23f6 | 340 | extern tree get_spill_slot_decl (bool); |
f6129d66 | 341 | |
78528714 JQ |
342 | /* Return a memory reference like MEMREF, but with its address changed to |
343 | ADDR. The caller is asserting that the actual piece of memory pointed | |
344 | to is the same, just the form of the address is being changed, such as | |
345 | by putting something into a register. */ | |
23b33725 | 346 | extern rtx replace_equiv_address (rtx, rtx, bool = false); |
78528714 JQ |
347 | |
348 | /* Likewise, but the reference is not required to be valid. */ | |
23b33725 | 349 | extern rtx replace_equiv_address_nv (rtx, rtx, bool = false); |
78528714 | 350 | |
5936d944 JH |
351 | extern rtx gen_blockage (void); |
352 | extern rtvec gen_rtvec (int, ...); | |
353 | extern rtx copy_insn_1 (rtx); | |
354 | extern rtx copy_insn (rtx); | |
f8f0516e | 355 | extern rtx_insn *copy_delay_slot_insn (rtx_insn *); |
ef4bddc2 | 356 | extern rtx gen_int_mode (HOST_WIDE_INT, machine_mode); |
a1950df3 | 357 | extern rtx_insn *emit_copy_of_insn_after (rtx_insn *, rtx_insn *); |
5936d944 JH |
358 | extern void set_reg_attrs_from_value (rtx, rtx); |
359 | extern void set_reg_attrs_for_parm (rtx, rtx); | |
360 | extern void set_reg_attrs_for_decl_rtl (tree t, rtx x); | |
ef4bddc2 | 361 | extern void adjust_reg_mode (rtx, machine_mode); |
5936d944 JH |
362 | extern int mem_expr_equal_p (const_tree, const_tree); |
363 | ||
8930883e MK |
364 | extern bool need_atomic_barrier_p (enum memmodel, bool); |
365 | ||
614d5bd8 AM |
366 | /* Return the current sequence. */ |
367 | ||
368 | static inline struct sequence_stack * | |
369 | get_current_sequence (void) | |
370 | { | |
371 | return &crtl->emit.seq; | |
372 | } | |
373 | ||
374 | /* Return the outermost sequence. */ | |
375 | ||
376 | static inline struct sequence_stack * | |
377 | get_topmost_sequence (void) | |
378 | { | |
379 | struct sequence_stack *seq, *top; | |
380 | ||
381 | seq = get_current_sequence (); | |
382 | do | |
383 | { | |
384 | top = seq; | |
385 | seq = seq->next; | |
386 | } while (seq); | |
387 | return top; | |
388 | } | |
389 | ||
5936d944 JH |
390 | /* Return the first insn of the current sequence or current function. */ |
391 | ||
981ac3c7 | 392 | static inline rtx_insn * |
5936d944 JH |
393 | get_insns (void) |
394 | { | |
614d5bd8 | 395 | return get_current_sequence ()->first; |
5936d944 JH |
396 | } |
397 | ||
398 | /* Specify a new insn as the first in the chain. */ | |
399 | ||
400 | static inline void | |
fee3e72c | 401 | set_first_insn (rtx_insn *insn) |
5936d944 | 402 | { |
06795261 | 403 | gcc_checking_assert (!insn || !PREV_INSN (insn)); |
614d5bd8 | 404 | get_current_sequence ()->first = insn; |
5936d944 JH |
405 | } |
406 | ||
407 | /* Return the last insn emitted in current sequence or current function. */ | |
408 | ||
981ac3c7 | 409 | static inline rtx_insn * |
5936d944 JH |
410 | get_last_insn (void) |
411 | { | |
614d5bd8 | 412 | return get_current_sequence ()->last; |
5936d944 JH |
413 | } |
414 | ||
415 | /* Specify a new insn as the last in the chain. */ | |
416 | ||
417 | static inline void | |
fee3e72c | 418 | set_last_insn (rtx_insn *insn) |
5936d944 | 419 | { |
06795261 | 420 | gcc_checking_assert (!insn || !NEXT_INSN (insn)); |
614d5bd8 | 421 | get_current_sequence ()->last = insn; |
5936d944 JH |
422 | } |
423 | ||
424 | /* Return a number larger than any instruction's uid in this function. */ | |
425 | ||
426 | static inline int | |
427 | get_max_uid (void) | |
428 | { | |
429 | return crtl->emit.x_cur_insn_uid; | |
430 | } | |
d8a2d370 DN |
431 | |
432 | extern void set_decl_incoming_rtl (tree, rtx, bool); | |
433 | ||
36566b39 PK |
434 | /* Return a memory reference like MEMREF, but with its mode changed |
435 | to MODE and its address changed to ADDR. | |
436 | (VOIDmode means don't change the mode. | |
437 | NULL for ADDR means don't change the address.) */ | |
438 | extern rtx change_address (rtx, machine_mode, rtx); | |
439 | ||
440 | /* Return a memory reference like MEMREF, but with its mode changed | |
441 | to MODE and its address offset by OFFSET bytes. */ | |
442 | #define adjust_address(MEMREF, MODE, OFFSET) \ | |
443 | adjust_address_1 (MEMREF, MODE, OFFSET, 1, 1, 0, 0) | |
444 | ||
445 | /* Likewise, but the reference is not required to be valid. */ | |
446 | #define adjust_address_nv(MEMREF, MODE, OFFSET) \ | |
447 | adjust_address_1 (MEMREF, MODE, OFFSET, 0, 1, 0, 0) | |
448 | ||
449 | /* Return a memory reference like MEMREF, but with its mode changed | |
450 | to MODE and its address offset by OFFSET bytes. Assume that it's | |
451 | for a bitfield and conservatively drop the underlying object if we | |
452 | cannot be sure to stay within its bounds. */ | |
453 | #define adjust_bitfield_address(MEMREF, MODE, OFFSET) \ | |
454 | adjust_address_1 (MEMREF, MODE, OFFSET, 1, 1, 1, 0) | |
455 | ||
456 | /* As for adjust_bitfield_address, but specify that the width of | |
457 | BLKmode accesses is SIZE bytes. */ | |
458 | #define adjust_bitfield_address_size(MEMREF, MODE, OFFSET, SIZE) \ | |
459 | adjust_address_1 (MEMREF, MODE, OFFSET, 1, 1, 1, SIZE) | |
460 | ||
461 | /* Likewise, but the reference is not required to be valid. */ | |
462 | #define adjust_bitfield_address_nv(MEMREF, MODE, OFFSET) \ | |
463 | adjust_address_1 (MEMREF, MODE, OFFSET, 0, 1, 1, 0) | |
464 | ||
465 | /* Return a memory reference like MEMREF, but with its mode changed | |
466 | to MODE and its address changed to ADDR, which is assumed to be | |
467 | increased by OFFSET bytes from MEMREF. */ | |
468 | #define adjust_automodify_address(MEMREF, MODE, ADDR, OFFSET) \ | |
469 | adjust_automodify_address_1 (MEMREF, MODE, ADDR, OFFSET, 1) | |
470 | ||
471 | /* Likewise, but the reference is not required to be valid. */ | |
472 | #define adjust_automodify_address_nv(MEMREF, MODE, ADDR, OFFSET) \ | |
473 | adjust_automodify_address_1 (MEMREF, MODE, ADDR, OFFSET, 0) | |
474 | ||
475 | extern rtx adjust_address_1 (rtx, machine_mode, HOST_WIDE_INT, int, int, | |
476 | int, HOST_WIDE_INT); | |
477 | extern rtx adjust_automodify_address_1 (rtx, machine_mode, rtx, | |
478 | HOST_WIDE_INT, int); | |
479 | ||
480 | /* Return a memory reference like MEMREF, but whose address is changed by | |
481 | adding OFFSET, an RTX, to it. POW2 is the highest power of two factor | |
482 | known to be in OFFSET (possibly 1). */ | |
483 | extern rtx offset_address (rtx, rtx, unsigned HOST_WIDE_INT); | |
484 | ||
485 | /* Given REF, a MEM, and T, either the type of X or the expression | |
486 | corresponding to REF, set the memory attributes. OBJECTP is nonzero | |
487 | if we are making a new object of this type. */ | |
488 | extern void set_mem_attributes (rtx, tree, int); | |
489 | ||
490 | /* Similar, except that BITPOS has not yet been applied to REF, so if | |
491 | we alter MEM_OFFSET according to T then we should subtract BITPOS | |
492 | expecting that it'll be added back in later. */ | |
493 | extern void set_mem_attributes_minus_bitpos (rtx, tree, int, HOST_WIDE_INT); | |
494 | ||
495 | /* Return OFFSET if XEXP (MEM, 0) - OFFSET is known to be ALIGN | |
496 | bits aligned for 0 <= OFFSET < ALIGN / BITS_PER_UNIT, or | |
497 | -1 if not known. */ | |
498 | extern int get_mem_align_offset (rtx, unsigned int); | |
499 | ||
500 | /* Return a memory reference like MEMREF, but with its mode widened to | |
501 | MODE and adjusted by OFFSET. */ | |
502 | extern rtx widen_memory_access (rtx, machine_mode, HOST_WIDE_INT); | |
503 | ||
78528714 | 504 | #endif /* GCC_EMIT_RTL_H */ |