1 /* Procedure integration for GCC.
2 Copyright (C) 1988, 1991, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
3 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
4 Contributed by Michael Tiemann (tiemann@cygnus.com)
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 2, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to the Free
20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
25 #include "coretypes.h"
34 #include "insn-config.h"
38 #include "integrate.h"
48 #include "langhooks.h"
50 /* Similar, but round to the next highest integer that meets the
52 #define CEIL_ROUND(VALUE,ALIGN) (((VALUE) + (ALIGN) - 1) & ~((ALIGN)- 1))
54 /* Default max number of insns a function can have and still be inline.
55 This is overridden on RISC machines. */
56 #ifndef INTEGRATE_THRESHOLD
57 /* Inlining small functions might save more space then not inlining at
58 all. Assume 1 instruction for the call and 1.5 insns per argument. */
59 #define INTEGRATE_THRESHOLD(DECL) \
61 ? (1 + (3 * list_length (DECL_ARGUMENTS (DECL))) / 2) \
62 : (8 * (8 + list_length (DECL_ARGUMENTS (DECL)))))
66 /* Private type used by {get/has}_func_hard_reg_initial_val. */
67 typedef struct initial_value_pair GTY(()) {
71 typedef struct initial_value_struct GTY(()) {
74 initial_value_pair * GTY ((length ("%h.num_entries"))) entries;
75 } initial_value_struct;
77 static void setup_initial_hard_reg_value_integration PARAMS ((struct function *, struct inline_remap *));
79 static rtvec initialize_for_inline PARAMS ((tree));
80 static void note_modified_parmregs PARAMS ((rtx, rtx, void *));
81 static void integrate_parm_decls PARAMS ((tree, struct inline_remap *,
83 static tree integrate_decl_tree PARAMS ((tree,
84 struct inline_remap *));
85 static void subst_constants PARAMS ((rtx *, rtx,
86 struct inline_remap *, int));
87 static void set_block_origin_self PARAMS ((tree));
88 static void set_block_abstract_flags PARAMS ((tree, int));
89 static void process_reg_param PARAMS ((struct inline_remap *, rtx,
91 void set_decl_abstract_flags PARAMS ((tree, int));
92 static void mark_stores PARAMS ((rtx, rtx, void *));
93 static void save_parm_insns PARAMS ((rtx, rtx));
94 static void copy_insn_list PARAMS ((rtx, struct inline_remap *,
96 static void copy_insn_notes PARAMS ((rtx, struct inline_remap *,
98 static int compare_blocks PARAMS ((const PTR, const PTR));
99 static int find_block PARAMS ((const PTR, const PTR));
101 /* Used by copy_rtx_and_substitute; this indicates whether the function is
102 called for the purpose of inlining or some other purpose (i.e. loop
103 unrolling). This affects how constant pool references are handled.
104 This variable contains the FUNCTION_DECL for the inlined function. */
105 static struct function *inlining = 0;
107 /* Returns the Ith entry in the label_map contained in MAP. If the
108 Ith entry has not yet been set, return a fresh label. This function
109 performs a lazy initialization of label_map, thereby avoiding huge memory
110 explosions when the label_map gets very large. */
113 get_label_from_map (map, i)
114 struct inline_remap *map;
117 rtx x = map->label_map[i];
120 x = map->label_map[i] = gen_label_rtx ();
125 /* Return false if the function FNDECL cannot be inlined on account of its
126 attributes, true otherwise. */
128 function_attribute_inlinable_p (fndecl)
131 if (targetm.attribute_table)
135 for (a = DECL_ATTRIBUTES (fndecl); a; a = TREE_CHAIN (a))
137 tree name = TREE_PURPOSE (a);
140 for (i = 0; targetm.attribute_table[i].name != NULL; i++)
141 if (is_attribute_p (targetm.attribute_table[i].name, name))
142 return (*targetm.function_attribute_inlinable_p) (fndecl);
149 /* Zero if the current function (whose FUNCTION_DECL is FNDECL)
150 is safe and reasonable to integrate into other functions.
151 Nonzero means value is a warning msgid with a single %s
152 for the function's name. */
155 function_cannot_inline_p (fndecl)
159 tree last = tree_last (TYPE_ARG_TYPES (TREE_TYPE (fndecl)));
161 /* For functions marked as inline increase the maximum size to
162 MAX_INLINE_INSNS_RTL (--param max-inline-insn-rtl=<n>). For
163 regular functions use the limit given by INTEGRATE_THRESHOLD.
164 Note that the RTL inliner is not used by the languages that use
165 the tree inliner (C, C++). */
167 int max_insns = (DECL_INLINE (fndecl))
168 ? (MAX_INLINE_INSNS_RTL
169 + 8 * list_length (DECL_ARGUMENTS (fndecl)))
170 : INTEGRATE_THRESHOLD (fndecl);
175 if (DECL_UNINLINABLE (fndecl))
176 return N_("function cannot be inline");
178 /* No inlines with varargs. */
179 if (last && TREE_VALUE (last) != void_type_node)
180 return N_("varargs function cannot be inline");
182 if (current_function_calls_alloca)
183 return N_("function using alloca cannot be inline");
185 if (current_function_calls_setjmp)
186 return N_("function using setjmp cannot be inline");
188 if (current_function_calls_eh_return)
189 return N_("function uses __builtin_eh_return");
191 if (current_function_contains_functions)
192 return N_("function with nested functions cannot be inline");
196 N_("function with label addresses used in initializers cannot inline");
198 if (current_function_cannot_inline)
199 return current_function_cannot_inline;
201 /* If its not even close, don't even look. */
202 if (get_max_uid () > 3 * max_insns)
203 return N_("function too large to be inline");
206 /* Don't inline functions which do not specify a function prototype and
207 have BLKmode argument or take the address of a parameter. */
208 for (parms = DECL_ARGUMENTS (fndecl); parms; parms = TREE_CHAIN (parms))
210 if (TYPE_MODE (TREE_TYPE (parms)) == BLKmode)
211 TREE_ADDRESSABLE (parms) = 1;
212 if (last == NULL_TREE && TREE_ADDRESSABLE (parms))
213 return N_("no prototype, and parameter address used; cannot be inline");
217 /* We can't inline functions that return structures
218 the old-fashioned PCC way, copying into a static block. */
219 if (current_function_returns_pcc_struct)
220 return N_("inline functions not supported for this return value type");
222 /* We can't inline functions that return structures of varying size. */
223 if (TREE_CODE (TREE_TYPE (TREE_TYPE (fndecl))) != VOID_TYPE
224 && int_size_in_bytes (TREE_TYPE (TREE_TYPE (fndecl))) < 0)
225 return N_("function with varying-size return value cannot be inline");
227 /* Cannot inline a function with a varying size argument or one that
228 receives a transparent union. */
229 for (parms = DECL_ARGUMENTS (fndecl); parms; parms = TREE_CHAIN (parms))
231 if (int_size_in_bytes (TREE_TYPE (parms)) < 0)
232 return N_("function with varying-size parameter cannot be inline");
233 else if (TREE_CODE (TREE_TYPE (parms)) == UNION_TYPE
234 && TYPE_TRANSPARENT_UNION (TREE_TYPE (parms)))
235 return N_("function with transparent unit parameter cannot be inline");
238 if (get_max_uid () > max_insns)
240 for (ninsns = 0, insn = get_first_nonparm_insn ();
241 insn && ninsns < max_insns;
242 insn = NEXT_INSN (insn))
246 if (ninsns >= max_insns)
247 return N_("function too large to be inline");
250 /* We will not inline a function which uses computed goto. The addresses of
251 its local labels, which may be tucked into global storage, are of course
252 not constant across instantiations, which causes unexpected behavior. */
253 if (current_function_has_computed_jump)
254 return N_("function with computed jump cannot inline");
256 /* We cannot inline a nested function that jumps to a nonlocal label. */
257 if (current_function_has_nonlocal_goto)
258 return N_("function with nonlocal goto cannot be inline");
260 /* We can't inline functions that return a PARALLEL rtx. */
261 if (DECL_RTL_SET_P (DECL_RESULT (fndecl)))
263 rtx result = DECL_RTL (DECL_RESULT (fndecl));
264 if (GET_CODE (result) == PARALLEL)
265 return N_("inline functions not supported for this return value type");
268 /* If the function has a target specific attribute attached to it,
269 then we assume that we should not inline it. This can be overridden
270 by the target if it defines TARGET_FUNCTION_ATTRIBUTE_INLINABLE_P. */
271 if (!function_attribute_inlinable_p (fndecl))
272 return N_("function with target specific attribute(s) cannot be inlined");
277 /* Map pseudo reg number into the PARM_DECL for the parm living in the reg.
278 Zero for a reg that isn't a parm's home.
279 Only reg numbers less than max_parm_reg are mapped here. */
280 static tree *parmdecl_map;
282 /* In save_for_inline, nonzero if past the parm-initialization insns. */
283 static int in_nonparm_insns;
285 /* Subroutine for `save_for_inline'. Performs initialization
286 needed to save FNDECL's insns and info for future inline expansion. */
289 initialize_for_inline (fndecl)
296 /* Clear out PARMDECL_MAP. It was allocated in the caller's frame. */
297 memset ((char *) parmdecl_map, 0, max_parm_reg * sizeof (tree));
298 arg_vector = rtvec_alloc (list_length (DECL_ARGUMENTS (fndecl)));
300 for (parms = DECL_ARGUMENTS (fndecl), i = 0;
302 parms = TREE_CHAIN (parms), i++)
304 rtx p = DECL_RTL (parms);
306 /* If we have (mem (addressof (mem ...))), use the inner MEM since
307 otherwise the copy_rtx call below will not unshare the MEM since
308 it shares ADDRESSOF. */
309 if (GET_CODE (p) == MEM && GET_CODE (XEXP (p, 0)) == ADDRESSOF
310 && GET_CODE (XEXP (XEXP (p, 0), 0)) == MEM)
311 p = XEXP (XEXP (p, 0), 0);
313 RTVEC_ELT (arg_vector, i) = p;
315 if (GET_CODE (p) == REG)
316 parmdecl_map[REGNO (p)] = parms;
317 else if (GET_CODE (p) == CONCAT)
319 rtx preal = gen_realpart (GET_MODE (XEXP (p, 0)), p);
320 rtx pimag = gen_imagpart (GET_MODE (preal), p);
322 if (GET_CODE (preal) == REG)
323 parmdecl_map[REGNO (preal)] = parms;
324 if (GET_CODE (pimag) == REG)
325 parmdecl_map[REGNO (pimag)] = parms;
328 /* This flag is cleared later
329 if the function ever modifies the value of the parm. */
330 TREE_READONLY (parms) = 1;
336 /* Copy NODE (which must be a DECL, but not a PARM_DECL). The DECL
337 originally was in the FROM_FN, but now it will be in the
341 copy_decl_for_inlining (decl, from_fn, to_fn)
348 /* Copy the declaration. */
349 if (TREE_CODE (decl) == PARM_DECL || TREE_CODE (decl) == RESULT_DECL)
354 /* See if the frontend wants to pass this by invisible reference. */
355 if (TREE_CODE (decl) == PARM_DECL
356 && DECL_ARG_TYPE (decl) != TREE_TYPE (decl)
357 && POINTER_TYPE_P (DECL_ARG_TYPE (decl))
358 && TREE_TYPE (DECL_ARG_TYPE (decl)) == TREE_TYPE (decl))
361 type = DECL_ARG_TYPE (decl);
364 type = TREE_TYPE (decl);
366 /* For a parameter, we must make an equivalent VAR_DECL, not a
368 copy = build_decl (VAR_DECL, DECL_NAME (decl), type);
371 TREE_ADDRESSABLE (copy) = TREE_ADDRESSABLE (decl);
372 TREE_READONLY (copy) = TREE_READONLY (decl);
373 TREE_THIS_VOLATILE (copy) = TREE_THIS_VOLATILE (decl);
377 TREE_ADDRESSABLE (copy) = 0;
378 TREE_READONLY (copy) = 1;
379 TREE_THIS_VOLATILE (copy) = 0;
384 copy = copy_node (decl);
385 (*lang_hooks.dup_lang_specific_decl) (copy);
387 /* TREE_ADDRESSABLE isn't used to indicate that a label's
388 address has been taken; it's for internal bookkeeping in
389 expand_goto_internal. */
390 if (TREE_CODE (copy) == LABEL_DECL)
391 TREE_ADDRESSABLE (copy) = 0;
394 /* Set the DECL_ABSTRACT_ORIGIN so the debugging routines know what
395 declaration inspired this copy. */
396 DECL_ABSTRACT_ORIGIN (copy) = DECL_ORIGIN (decl);
398 /* The new variable/label has no RTL, yet. */
399 if (!TREE_STATIC (copy) && !DECL_EXTERNAL (copy))
400 SET_DECL_RTL (copy, NULL_RTX);
402 /* These args would always appear unused, if not for this. */
403 TREE_USED (copy) = 1;
405 /* Set the context for the new declaration. */
406 if (!DECL_CONTEXT (decl))
407 /* Globals stay global. */
409 else if (DECL_CONTEXT (decl) != from_fn)
410 /* Things that weren't in the scope of the function we're inlining
411 from aren't in the scope we're inlining to, either. */
413 else if (TREE_STATIC (decl))
414 /* Function-scoped static variables should stay in the original
418 /* Ordinary automatic local variables are now in the scope of the
420 DECL_CONTEXT (copy) = to_fn;
425 /* Make the insns and PARM_DECLs of the current function permanent
426 and record other information in DECL_SAVED_INSNS to allow inlining
427 of this function in subsequent calls.
429 This routine need not copy any insns because we are not going
430 to immediately compile the insns in the insn chain. There
431 are two cases when we would compile the insns for FNDECL:
432 (1) when FNDECL is expanded inline, and (2) when FNDECL needs to
433 be output at the end of other compilation, because somebody took
434 its address. In the first case, the insns of FNDECL are copied
435 as it is expanded inline, so FNDECL's saved insns are not
436 modified. In the second case, FNDECL is used for the last time,
437 so modifying the rtl is not a problem.
439 We don't have to worry about FNDECL being inline expanded by
440 other functions which are written at the end of compilation
441 because flag_no_inline is turned on when we begin writing
442 functions at the end of compilation. */
445 save_for_inline (fndecl)
450 rtx first_nonparm_insn;
452 /* Set up PARMDECL_MAP which maps pseudo-reg number to its PARM_DECL.
453 Later we set TREE_READONLY to 0 if the parm is modified inside the fn.
454 Also set up ARG_VECTOR, which holds the unmodified DECL_RTX values
455 for the parms, prior to elimination of virtual registers.
456 These values are needed for substituting parms properly. */
457 if (! flag_no_inline)
458 parmdecl_map = (tree *) xmalloc (max_parm_reg * sizeof (tree));
460 /* Make and emit a return-label if we have not already done so. */
462 if (return_label == 0)
464 return_label = gen_label_rtx ();
465 emit_label (return_label);
468 if (! flag_no_inline)
469 argvec = initialize_for_inline (fndecl);
473 /* Delete basic block notes created by early run of find_basic_block.
474 The notes would be later used by find_basic_blocks to reuse the memory
475 for basic_block structures on already freed obstack. */
476 for (insn = get_insns (); insn ; insn = NEXT_INSN (insn))
477 if (GET_CODE (insn) == NOTE && NOTE_LINE_NUMBER (insn) == NOTE_INSN_BASIC_BLOCK)
478 delete_related_insns (insn);
480 /* If there are insns that copy parms from the stack into pseudo registers,
481 those insns are not copied. `expand_inline_function' must
482 emit the correct code to handle such things. */
485 if (GET_CODE (insn) != NOTE)
488 if (! flag_no_inline)
490 /* Get the insn which signals the end of parameter setup code. */
491 first_nonparm_insn = get_first_nonparm_insn ();
493 /* Now just scan the chain of insns to see what happens to our
494 PARM_DECLs. If a PARM_DECL is used but never modified, we
495 can substitute its rtl directly when expanding inline (and
496 perform constant folding when its incoming value is
497 constant). Otherwise, we have to copy its value into a new
498 register and track the new register's life. */
499 in_nonparm_insns = 0;
500 save_parm_insns (insn, first_nonparm_insn);
502 cfun->inl_max_label_num = max_label_num ();
503 cfun->inl_last_parm_insn = cfun->x_last_parm_insn;
504 cfun->original_arg_vector = argvec;
506 cfun->original_decl_initial = DECL_INITIAL (fndecl);
507 cfun->no_debugging_symbols = (write_symbols == NO_DEBUG);
508 DECL_SAVED_INSNS (fndecl) = cfun;
511 if (! flag_no_inline)
515 /* Scan the chain of insns to see what happens to our PARM_DECLs. If a
516 PARM_DECL is used but never modified, we can substitute its rtl directly
517 when expanding inline (and perform constant folding when its incoming
518 value is constant). Otherwise, we have to copy its value into a new
519 register and track the new register's life. */
522 save_parm_insns (insn, first_nonparm_insn)
524 rtx first_nonparm_insn;
526 if (insn == NULL_RTX)
529 for (insn = NEXT_INSN (insn); insn; insn = NEXT_INSN (insn))
531 if (insn == first_nonparm_insn)
532 in_nonparm_insns = 1;
536 /* Record what interesting things happen to our parameters. */
537 note_stores (PATTERN (insn), note_modified_parmregs, NULL);
539 /* If this is a CALL_PLACEHOLDER insn then we need to look into the
540 three attached sequences: normal call, sibling call and tail
542 if (GET_CODE (insn) == CALL_INSN
543 && GET_CODE (PATTERN (insn)) == CALL_PLACEHOLDER)
547 for (i = 0; i < 3; i++)
548 save_parm_insns (XEXP (PATTERN (insn), i),
555 /* Note whether a parameter is modified or not. */
558 note_modified_parmregs (reg, x, data)
560 rtx x ATTRIBUTE_UNUSED;
561 void *data ATTRIBUTE_UNUSED;
563 if (GET_CODE (reg) == REG && in_nonparm_insns
564 && REGNO (reg) < max_parm_reg
565 && REGNO (reg) >= FIRST_PSEUDO_REGISTER
566 && parmdecl_map[REGNO (reg)] != 0)
567 TREE_READONLY (parmdecl_map[REGNO (reg)]) = 0;
570 /* Unfortunately, we need a global copy of const_equiv map for communication
571 with a function called from note_stores. Be *very* careful that this
572 is used properly in the presence of recursion. */
574 varray_type global_const_equiv_varray;
576 #define FIXED_BASE_PLUS_P(X) \
577 (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 1)) == CONST_INT \
578 && GET_CODE (XEXP (X, 0)) == REG \
579 && REGNO (XEXP (X, 0)) >= FIRST_VIRTUAL_REGISTER \
580 && REGNO (XEXP (X, 0)) <= LAST_VIRTUAL_REGISTER)
582 /* Called to set up a mapping for the case where a parameter is in a
583 register. If it is read-only and our argument is a constant, set up the
584 constant equivalence.
586 If LOC is REG_USERVAR_P, the usual case, COPY must also have that flag set
589 Also, don't allow hard registers here; they might not be valid when
590 substituted into insns. */
592 process_reg_param (map, loc, copy)
593 struct inline_remap *map;
596 if ((GET_CODE (copy) != REG && GET_CODE (copy) != SUBREG)
597 || (GET_CODE (copy) == REG && REG_USERVAR_P (loc)
598 && ! REG_USERVAR_P (copy))
599 || (GET_CODE (copy) == REG
600 && REGNO (copy) < FIRST_PSEUDO_REGISTER))
602 rtx temp = copy_to_mode_reg (GET_MODE (loc), copy);
603 REG_USERVAR_P (temp) = REG_USERVAR_P (loc);
604 if (CONSTANT_P (copy) || FIXED_BASE_PLUS_P (copy))
605 SET_CONST_EQUIV_DATA (map, temp, copy, CONST_AGE_PARM);
608 map->reg_map[REGNO (loc)] = copy;
611 /* Compare two BLOCKs for qsort. The key we sort on is the
612 BLOCK_ABSTRACT_ORIGIN of the blocks. We cannot just subtract the
613 two pointers, because it may overflow sizeof(int). */
616 compare_blocks (v1, v2)
620 tree b1 = *((const tree *) v1);
621 tree b2 = *((const tree *) v2);
622 char *p1 = (char *) BLOCK_ABSTRACT_ORIGIN (b1);
623 char *p2 = (char *) BLOCK_ABSTRACT_ORIGIN (b2);
627 return p1 < p2 ? -1 : 1;
630 /* Compare two BLOCKs for bsearch. The first pointer corresponds to
631 an original block; the second to a remapped equivalent. */
638 const union tree_node *b1 = (const union tree_node *) v1;
639 tree b2 = *((const tree *) v2);
640 char *p1 = (char *) b1;
641 char *p2 = (char *) BLOCK_ABSTRACT_ORIGIN (b2);
645 return p1 < p2 ? -1 : 1;
648 /* Integrate the procedure defined by FNDECL. Note that this function
649 may wind up calling itself. Since the static variables are not
650 reentrant, we do not assign them until after the possibility
651 of recursion is eliminated.
653 If IGNORE is nonzero, do not produce a value.
654 Otherwise store the value in TARGET if it is nonzero and that is convenient.
657 (rtx)-1 if we could not substitute the function
658 0 if we substituted it and it does not produce a value
659 else an rtx for where the value is stored. */
662 expand_inline_function (fndecl, parms, target, ignore, type,
663 structure_value_addr)
668 rtx structure_value_addr;
670 struct function *inlining_previous;
671 struct function *inl_f = DECL_SAVED_INSNS (fndecl);
672 tree formal, actual, block;
673 rtx parm_insns = inl_f->emit->x_first_insn;
674 rtx insns = (inl_f->inl_last_parm_insn
675 ? NEXT_INSN (inl_f->inl_last_parm_insn)
681 int min_labelno = inl_f->emit->x_first_label_num;
682 int max_labelno = inl_f->inl_max_label_num;
687 struct inline_remap *map = 0;
688 rtvec arg_vector = inl_f->original_arg_vector;
689 rtx static_chain_value = 0;
691 int eh_region_offset;
693 /* The pointer used to track the true location of the memory used
694 for MAP->LABEL_MAP. */
695 rtx *real_label_map = 0;
697 /* Allow for equivalences of the pseudos we make for virtual fp and ap. */
698 max_regno = inl_f->emit->x_reg_rtx_no + 3;
699 if (max_regno < FIRST_PSEUDO_REGISTER)
702 /* Pull out the decl for the function definition; fndecl may be a
703 local declaration, which would break DECL_ABSTRACT_ORIGIN. */
704 fndecl = inl_f->decl;
706 nargs = list_length (DECL_ARGUMENTS (fndecl));
708 if (cfun->preferred_stack_boundary < inl_f->preferred_stack_boundary)
709 cfun->preferred_stack_boundary = inl_f->preferred_stack_boundary;
711 /* Check that the parms type match and that sufficient arguments were
712 passed. Since the appropriate conversions or default promotions have
713 already been applied, the machine modes should match exactly. */
715 for (formal = DECL_ARGUMENTS (fndecl), actual = parms;
717 formal = TREE_CHAIN (formal), actual = TREE_CHAIN (actual))
720 enum machine_mode mode;
723 return (rtx) (size_t) -1;
725 arg = TREE_VALUE (actual);
726 mode = TYPE_MODE (DECL_ARG_TYPE (formal));
728 if (arg == error_mark_node
729 || mode != TYPE_MODE (TREE_TYPE (arg))
730 /* If they are block mode, the types should match exactly.
731 They don't match exactly if TREE_TYPE (FORMAL) == ERROR_MARK_NODE,
732 which could happen if the parameter has incomplete type. */
734 && (TYPE_MAIN_VARIANT (TREE_TYPE (arg))
735 != TYPE_MAIN_VARIANT (TREE_TYPE (formal)))))
736 return (rtx) (size_t) -1;
739 /* If there is a TARGET which is a readonly BLKmode MEM and DECL_RESULT
740 is also a mem, we are going to lose the readonly on the stores, so don't
742 if (target != 0 && GET_CODE (target) == MEM && GET_MODE (target) == BLKmode
743 && RTX_UNCHANGING_P (target) && DECL_RTL_SET_P (DECL_RESULT (fndecl))
744 && GET_CODE (DECL_RTL (DECL_RESULT (fndecl))) == MEM)
745 return (rtx) (size_t) -1;
747 /* Extra arguments are valid, but will be ignored below, so we must
748 evaluate them here for side-effects. */
749 for (; actual; actual = TREE_CHAIN (actual))
750 expand_expr (TREE_VALUE (actual), const0_rtx,
751 TYPE_MODE (TREE_TYPE (TREE_VALUE (actual))), 0);
753 /* Expand the function arguments. Do this first so that any
754 new registers get created before we allocate the maps. */
756 arg_vals = (rtx *) xmalloc (nargs * sizeof (rtx));
757 arg_trees = (tree *) xmalloc (nargs * sizeof (tree));
759 for (formal = DECL_ARGUMENTS (fndecl), actual = parms, i = 0;
761 formal = TREE_CHAIN (formal), actual = TREE_CHAIN (actual), i++)
763 /* Actual parameter, converted to the type of the argument within the
765 tree arg = convert (TREE_TYPE (formal), TREE_VALUE (actual));
766 /* Mode of the variable used within the function. */
767 enum machine_mode mode = TYPE_MODE (TREE_TYPE (formal));
771 loc = RTVEC_ELT (arg_vector, i);
773 /* If this is an object passed by invisible reference, we copy the
774 object into a stack slot and save its address. If this will go
775 into memory, we do nothing now. Otherwise, we just expand the
777 if (GET_CODE (loc) == MEM && GET_CODE (XEXP (loc, 0)) == REG
778 && REGNO (XEXP (loc, 0)) > LAST_VIRTUAL_REGISTER)
780 rtx stack_slot = assign_temp (TREE_TYPE (arg), 1, 1, 1);
782 store_expr (arg, stack_slot, 0);
783 arg_vals[i] = XEXP (stack_slot, 0);
786 else if (GET_CODE (loc) != MEM)
788 if (GET_MODE (loc) != TYPE_MODE (TREE_TYPE (arg)))
790 int unsignedp = TREE_UNSIGNED (TREE_TYPE (formal));
791 enum machine_mode pmode = TYPE_MODE (TREE_TYPE (formal));
793 pmode = promote_mode (TREE_TYPE (formal), pmode,
796 if (GET_MODE (loc) != pmode)
799 /* The mode if LOC and ARG can differ if LOC was a variable
800 that had its mode promoted via PROMOTED_MODE. */
801 arg_vals[i] = convert_modes (pmode,
802 TYPE_MODE (TREE_TYPE (arg)),
803 expand_expr (arg, NULL_RTX, mode,
808 arg_vals[i] = expand_expr (arg, NULL_RTX, mode, EXPAND_SUM);
813 /* If the formal type was const but the actual was not, we might
814 end up here with an rtx wrongly tagged unchanging in the caller's
815 context. Fix that. */
817 && (GET_CODE (arg_vals[i]) == REG || GET_CODE (arg_vals[i]) == MEM)
818 && ! TREE_READONLY (TREE_VALUE (actual)))
819 RTX_UNCHANGING_P (arg_vals[i]) = 0;
822 && (! TREE_READONLY (formal)
823 /* If the parameter is not read-only, copy our argument through
824 a register. Also, we cannot use ARG_VALS[I] if it overlaps
825 TARGET in any way. In the inline function, they will likely
826 be two different pseudos, and `safe_from_p' will make all
827 sorts of smart assumptions about their not conflicting.
828 But if ARG_VALS[I] overlaps TARGET, these assumptions are
829 wrong, so put ARG_VALS[I] into a fresh register.
830 Don't worry about invisible references, since their stack
831 temps will never overlap the target. */
834 && (GET_CODE (arg_vals[i]) == REG
835 || GET_CODE (arg_vals[i]) == SUBREG
836 || GET_CODE (arg_vals[i]) == MEM)
837 && reg_overlap_mentioned_p (arg_vals[i], target))
838 /* ??? We must always copy a SUBREG into a REG, because it might
839 get substituted into an address, and not all ports correctly
840 handle SUBREGs in addresses. */
841 || (GET_CODE (arg_vals[i]) == SUBREG)))
842 arg_vals[i] = copy_to_mode_reg (GET_MODE (loc), arg_vals[i]);
844 if (arg_vals[i] != 0 && GET_CODE (arg_vals[i]) == REG
845 && POINTER_TYPE_P (TREE_TYPE (formal)))
846 mark_reg_pointer (arg_vals[i],
847 TYPE_ALIGN (TREE_TYPE (TREE_TYPE (formal))));
850 /* Allocate the structures we use to remap things. */
852 map = (struct inline_remap *) xcalloc (1, sizeof (struct inline_remap));
853 map->fndecl = fndecl;
855 VARRAY_TREE_INIT (map->block_map, 10, "block_map");
856 map->reg_map = (rtx *) xcalloc (max_regno, sizeof (rtx));
858 /* We used to use alloca here, but the size of what it would try to
859 allocate would occasionally cause it to exceed the stack limit and
860 cause unpredictable core dumps. */
862 = (rtx *) xmalloc ((max_labelno) * sizeof (rtx));
863 map->label_map = real_label_map;
864 map->local_return_label = NULL_RTX;
866 inl_max_uid = (inl_f->emit->x_cur_insn_uid + 1);
867 map->insn_map = (rtx *) xcalloc (inl_max_uid, sizeof (rtx));
869 map->max_insnno = inl_max_uid;
871 map->integrating = 1;
872 map->compare_src = NULL_RTX;
873 map->compare_mode = VOIDmode;
875 /* const_equiv_varray maps pseudos in our routine to constants, so
876 it needs to be large enough for all our pseudos. This is the
877 number we are currently using plus the number in the called
878 routine, plus 15 for each arg, five to compute the virtual frame
879 pointer, and five for the return value. This should be enough
880 for most cases. We do not reference entries outside the range of
883 ??? These numbers are quite arbitrary and were obtained by
884 experimentation. At some point, we should try to allocate the
885 table after all the parameters are set up so we can more accurately
886 estimate the number of pseudos we will need. */
888 VARRAY_CONST_EQUIV_INIT (map->const_equiv_varray,
890 + (max_regno - FIRST_PSEUDO_REGISTER)
893 "expand_inline_function");
896 /* Record the current insn in case we have to set up pointers to frame
897 and argument memory blocks. If there are no insns yet, add a dummy
898 insn that can be used as an insertion point. */
899 map->insns_at_start = get_last_insn ();
900 if (map->insns_at_start == 0)
901 map->insns_at_start = emit_note (NULL, NOTE_INSN_DELETED);
903 map->regno_pointer_align = inl_f->emit->regno_pointer_align;
904 map->x_regno_reg_rtx = inl_f->emit->x_regno_reg_rtx;
906 /* Update the outgoing argument size to allow for those in the inlined
908 if (inl_f->outgoing_args_size > current_function_outgoing_args_size)
909 current_function_outgoing_args_size = inl_f->outgoing_args_size;
911 /* If the inline function needs to make PIC references, that means
912 that this function's PIC offset table must be used. */
913 if (inl_f->uses_pic_offset_table)
914 current_function_uses_pic_offset_table = 1;
916 /* If this function needs a context, set it up. */
917 if (inl_f->needs_context)
918 static_chain_value = lookup_static_chain (fndecl);
920 /* If the inlined function calls __builtin_constant_p, then we'll
921 need to call purge_builtin_constant_p on this function. */
922 if (inl_f->calls_constant_p)
923 current_function_calls_constant_p = 1;
925 if (GET_CODE (parm_insns) == NOTE
926 && NOTE_LINE_NUMBER (parm_insns) > 0)
928 rtx note = emit_line_note (NOTE_SOURCE_FILE (parm_insns),
929 NOTE_LINE_NUMBER (parm_insns));
931 RTX_INTEGRATED_P (note) = 1;
934 /* Process each argument. For each, set up things so that the function's
935 reference to the argument will refer to the argument being passed.
936 We only replace REG with REG here. Any simplifications are done
939 We make two passes: In the first, we deal with parameters that will
940 be placed into registers, since we need to ensure that the allocated
941 register number fits in const_equiv_map. Then we store all non-register
942 parameters into their memory location. */
944 /* Don't try to free temp stack slots here, because we may put one of the
945 parameters into a temp stack slot. */
947 for (i = 0; i < nargs; i++)
949 rtx copy = arg_vals[i];
951 loc = RTVEC_ELT (arg_vector, i);
953 /* There are three cases, each handled separately. */
954 if (GET_CODE (loc) == MEM && GET_CODE (XEXP (loc, 0)) == REG
955 && REGNO (XEXP (loc, 0)) > LAST_VIRTUAL_REGISTER)
957 /* This must be an object passed by invisible reference (it could
958 also be a variable-sized object, but we forbid inlining functions
959 with variable-sized arguments). COPY is the address of the
960 actual value (this computation will cause it to be copied). We
961 map that address for the register, noting the actual address as
962 an equivalent in case it can be substituted into the insns. */
964 if (GET_CODE (copy) != REG)
966 temp = copy_addr_to_reg (copy);
967 if (CONSTANT_P (copy) || FIXED_BASE_PLUS_P (copy))
968 SET_CONST_EQUIV_DATA (map, temp, copy, CONST_AGE_PARM);
971 map->reg_map[REGNO (XEXP (loc, 0))] = copy;
973 else if (GET_CODE (loc) == MEM)
975 /* This is the case of a parameter that lives in memory. It
976 will live in the block we allocate in the called routine's
977 frame that simulates the incoming argument area. Do nothing
978 with the parameter now; we will call store_expr later. In
979 this case, however, we must ensure that the virtual stack and
980 incoming arg rtx values are expanded now so that we can be
981 sure we have enough slots in the const equiv map since the
982 store_expr call can easily blow the size estimate. */
983 if (DECL_SAVED_INSNS (fndecl)->args_size != 0)
984 copy_rtx_and_substitute (virtual_incoming_args_rtx, map, 0);
986 else if (GET_CODE (loc) == REG)
987 process_reg_param (map, loc, copy);
988 else if (GET_CODE (loc) == CONCAT)
990 rtx locreal = gen_realpart (GET_MODE (XEXP (loc, 0)), loc);
991 rtx locimag = gen_imagpart (GET_MODE (XEXP (loc, 0)), loc);
992 rtx copyreal = gen_realpart (GET_MODE (locreal), copy);
993 rtx copyimag = gen_imagpart (GET_MODE (locimag), copy);
995 process_reg_param (map, locreal, copyreal);
996 process_reg_param (map, locimag, copyimag);
1002 /* Tell copy_rtx_and_substitute to handle constant pool SYMBOL_REFs
1003 specially. This function can be called recursively, so we need to
1004 save the previous value. */
1005 inlining_previous = inlining;
1008 /* Now do the parameters that will be placed in memory. */
1010 for (formal = DECL_ARGUMENTS (fndecl), i = 0;
1011 formal; formal = TREE_CHAIN (formal), i++)
1013 loc = RTVEC_ELT (arg_vector, i);
1015 if (GET_CODE (loc) == MEM
1016 /* Exclude case handled above. */
1017 && ! (GET_CODE (XEXP (loc, 0)) == REG
1018 && REGNO (XEXP (loc, 0)) > LAST_VIRTUAL_REGISTER))
1020 rtx note = emit_line_note (DECL_SOURCE_FILE (formal),
1021 DECL_SOURCE_LINE (formal));
1023 RTX_INTEGRATED_P (note) = 1;
1025 /* Compute the address in the area we reserved and store the
1027 temp = copy_rtx_and_substitute (loc, map, 1);
1028 subst_constants (&temp, NULL_RTX, map, 1);
1029 apply_change_group ();
1030 if (! memory_address_p (GET_MODE (temp), XEXP (temp, 0)))
1031 temp = change_address (temp, VOIDmode, XEXP (temp, 0));
1032 store_expr (arg_trees[i], temp, 0);
1036 /* Deal with the places that the function puts its result.
1037 We are driven by what is placed into DECL_RESULT.
1039 Initially, we assume that we don't have anything special handling for
1040 REG_FUNCTION_RETURN_VALUE_P. */
1042 map->inline_target = 0;
1043 loc = (DECL_RTL_SET_P (DECL_RESULT (fndecl))
1044 ? DECL_RTL (DECL_RESULT (fndecl)) : NULL_RTX);
1046 if (TYPE_MODE (type) == VOIDmode)
1047 /* There is no return value to worry about. */
1049 else if (GET_CODE (loc) == MEM)
1051 if (GET_CODE (XEXP (loc, 0)) == ADDRESSOF)
1053 temp = copy_rtx_and_substitute (loc, map, 1);
1054 subst_constants (&temp, NULL_RTX, map, 1);
1055 apply_change_group ();
1060 if (! structure_value_addr
1061 || ! aggregate_value_p (DECL_RESULT (fndecl)))
1064 /* Pass the function the address in which to return a structure
1065 value. Note that a constructor can cause someone to call us
1066 with STRUCTURE_VALUE_ADDR, but the initialization takes place
1067 via the first parameter, rather than the struct return address.
1069 We have two cases: If the address is a simple register
1070 indirect, use the mapping mechanism to point that register to
1071 our structure return address. Otherwise, store the structure
1072 return value into the place that it will be referenced from. */
1074 if (GET_CODE (XEXP (loc, 0)) == REG)
1076 temp = force_operand (structure_value_addr, NULL_RTX);
1077 temp = force_reg (Pmode, temp);
1078 /* A virtual register might be invalid in an insn, because
1079 it can cause trouble in reload. Since we don't have access
1080 to the expanders at map translation time, make sure we have
1081 a proper register now.
1082 If a virtual register is actually valid, cse or combine
1083 can put it into the mapped insns. */
1084 if (REGNO (temp) >= FIRST_VIRTUAL_REGISTER
1085 && REGNO (temp) <= LAST_VIRTUAL_REGISTER)
1086 temp = copy_to_mode_reg (Pmode, temp);
1087 map->reg_map[REGNO (XEXP (loc, 0))] = temp;
1089 if (CONSTANT_P (structure_value_addr)
1090 || GET_CODE (structure_value_addr) == ADDRESSOF
1091 || (GET_CODE (structure_value_addr) == PLUS
1092 && (XEXP (structure_value_addr, 0)
1093 == virtual_stack_vars_rtx)
1094 && (GET_CODE (XEXP (structure_value_addr, 1))
1097 SET_CONST_EQUIV_DATA (map, temp, structure_value_addr,
1103 temp = copy_rtx_and_substitute (loc, map, 1);
1104 subst_constants (&temp, NULL_RTX, map, 0);
1105 apply_change_group ();
1106 emit_move_insn (temp, structure_value_addr);
1111 /* We will ignore the result value, so don't look at its structure.
1112 Note that preparations for an aggregate return value
1113 do need to be made (above) even if it will be ignored. */
1115 else if (GET_CODE (loc) == REG)
1117 /* The function returns an object in a register and we use the return
1118 value. Set up our target for remapping. */
1120 /* Machine mode function was declared to return. */
1121 enum machine_mode departing_mode = TYPE_MODE (type);
1122 /* (Possibly wider) machine mode it actually computes
1123 (for the sake of callers that fail to declare it right).
1124 We have to use the mode of the result's RTL, rather than
1125 its type, since expand_function_start may have promoted it. */
1126 enum machine_mode arriving_mode
1127 = GET_MODE (DECL_RTL (DECL_RESULT (fndecl)));
1130 /* Don't use MEMs as direct targets because on some machines
1131 substituting a MEM for a REG makes invalid insns.
1132 Let the combiner substitute the MEM if that is valid. */
1133 if (target == 0 || GET_CODE (target) != REG
1134 || GET_MODE (target) != departing_mode)
1136 /* Don't make BLKmode registers. If this looks like
1137 a BLKmode object being returned in a register, get
1138 the mode from that, otherwise abort. */
1139 if (departing_mode == BLKmode)
1141 if (REG == GET_CODE (DECL_RTL (DECL_RESULT (fndecl))))
1143 departing_mode = GET_MODE (DECL_RTL (DECL_RESULT (fndecl)));
1144 arriving_mode = departing_mode;
1150 target = gen_reg_rtx (departing_mode);
1153 /* If function's value was promoted before return,
1154 avoid machine mode mismatch when we substitute INLINE_TARGET.
1155 But TARGET is what we will return to the caller. */
1156 if (arriving_mode != departing_mode)
1158 /* Avoid creating a paradoxical subreg wider than
1159 BITS_PER_WORD, since that is illegal. */
1160 if (GET_MODE_BITSIZE (arriving_mode) > BITS_PER_WORD)
1162 if (!TRULY_NOOP_TRUNCATION (GET_MODE_BITSIZE (departing_mode),
1163 GET_MODE_BITSIZE (arriving_mode)))
1164 /* Maybe could be handled by using convert_move () ? */
1166 reg_to_map = gen_reg_rtx (arriving_mode);
1167 target = gen_lowpart (departing_mode, reg_to_map);
1170 reg_to_map = gen_rtx_SUBREG (arriving_mode, target, 0);
1173 reg_to_map = target;
1175 /* Usually, the result value is the machine's return register.
1176 Sometimes it may be a pseudo. Handle both cases. */
1177 if (REG_FUNCTION_VALUE_P (loc))
1178 map->inline_target = reg_to_map;
1180 map->reg_map[REGNO (loc)] = reg_to_map;
1182 else if (GET_CODE (loc) == CONCAT)
1184 enum machine_mode departing_mode = TYPE_MODE (type);
1185 enum machine_mode arriving_mode
1186 = GET_MODE (DECL_RTL (DECL_RESULT (fndecl)));
1188 if (departing_mode != arriving_mode)
1190 if (GET_CODE (XEXP (loc, 0)) != REG
1191 || GET_CODE (XEXP (loc, 1)) != REG)
1194 /* Don't use MEMs as direct targets because on some machines
1195 substituting a MEM for a REG makes invalid insns.
1196 Let the combiner substitute the MEM if that is valid. */
1197 if (target == 0 || GET_CODE (target) != REG
1198 || GET_MODE (target) != departing_mode)
1199 target = gen_reg_rtx (departing_mode);
1201 if (GET_CODE (target) != CONCAT)
1204 map->reg_map[REGNO (XEXP (loc, 0))] = XEXP (target, 0);
1205 map->reg_map[REGNO (XEXP (loc, 1))] = XEXP (target, 1);
1210 /* Remap the exception handler data pointer from one to the other. */
1211 temp = get_exception_pointer (inl_f);
1213 map->reg_map[REGNO (temp)] = get_exception_pointer (cfun);
1215 /* Initialize label_map. get_label_from_map will actually make
1217 memset ((char *) &map->label_map[min_labelno], 0,
1218 (max_labelno - min_labelno) * sizeof (rtx));
1220 /* Make copies of the decls of the symbols in the inline function, so that
1221 the copies of the variables get declared in the current function. Set
1222 up things so that lookup_static_chain knows that to interpret registers
1223 in SAVE_EXPRs for TYPE_SIZEs as local. */
1224 inline_function_decl = fndecl;
1225 integrate_parm_decls (DECL_ARGUMENTS (fndecl), map, arg_vector);
1226 block = integrate_decl_tree (inl_f->original_decl_initial, map);
1227 BLOCK_ABSTRACT_ORIGIN (block) = DECL_ORIGIN (fndecl);
1228 inline_function_decl = 0;
1230 /* Make a fresh binding contour that we can easily remove. Do this after
1231 expanding our arguments so cleanups are properly scoped. */
1232 expand_start_bindings_and_block (0, block);
1234 /* Sort the block-map so that it will be easy to find remapped
1236 qsort (&VARRAY_TREE (map->block_map, 0),
1237 map->block_map->elements_used,
1241 /* Perform postincrements before actually calling the function. */
1244 /* Clean up stack so that variables might have smaller offsets. */
1245 do_pending_stack_adjust ();
1247 /* Save a copy of the location of const_equiv_varray for
1248 mark_stores, called via note_stores. */
1249 global_const_equiv_varray = map->const_equiv_varray;
1251 /* If the called function does an alloca, save and restore the
1252 stack pointer around the call. This saves stack space, but
1253 also is required if this inline is being done between two
1255 if (inl_f->calls_alloca)
1256 emit_stack_save (SAVE_BLOCK, &stack_save, NULL_RTX);
1258 /* Map pseudos used for initial hard reg values. */
1259 setup_initial_hard_reg_value_integration (inl_f, map);
1261 /* Now copy the insns one by one. */
1262 copy_insn_list (insns, map, static_chain_value);
1264 /* Duplicate the EH regions. This will create an offset from the
1265 region numbers in the function we're inlining to the region
1266 numbers in the calling function. This must wait until after
1267 copy_insn_list, as we need the insn map to be complete. */
1268 eh_region_offset = duplicate_eh_regions (inl_f, map);
1270 /* Now copy the REG_NOTES for those insns. */
1271 copy_insn_notes (insns, map, eh_region_offset);
1273 /* If the insn sequence required one, emit the return label. */
1274 if (map->local_return_label)
1275 emit_label (map->local_return_label);
1277 /* Restore the stack pointer if we saved it above. */
1278 if (inl_f->calls_alloca)
1279 emit_stack_restore (SAVE_BLOCK, stack_save, NULL_RTX);
1281 if (! cfun->x_whole_function_mode_p)
1282 /* In statement-at-a-time mode, we just tell the front-end to add
1283 this block to the list of blocks at this binding level. We
1284 can't do it the way it's done for function-at-a-time mode the
1285 superblocks have not been created yet. */
1286 (*lang_hooks.decls.insert_block) (block);
1290 = BLOCK_CHAIN (DECL_INITIAL (current_function_decl));
1291 BLOCK_CHAIN (DECL_INITIAL (current_function_decl)) = block;
1294 /* End the scope containing the copied formal parameter variables
1295 and copied LABEL_DECLs. We pass NULL_TREE for the variables list
1296 here so that expand_end_bindings will not check for unused
1297 variables. That's already been checked for when the inlined
1298 function was defined. */
1299 expand_end_bindings (NULL_TREE, 1, 1);
1301 /* Must mark the line number note after inlined functions as a repeat, so
1302 that the test coverage code can avoid counting the call twice. This
1303 just tells the code to ignore the immediately following line note, since
1304 there already exists a copy of this note before the expanded inline call.
1305 This line number note is still needed for debugging though, so we can't
1307 if (flag_test_coverage)
1308 emit_note (NULL, NOTE_INSN_REPEATED_LINE_NUMBER);
1310 emit_line_note (input_filename, input_line);
1312 /* If the function returns a BLKmode object in a register, copy it
1313 out of the temp register into a BLKmode memory object. */
1315 && TYPE_MODE (TREE_TYPE (TREE_TYPE (fndecl))) == BLKmode
1316 && ! aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl))))
1317 target = copy_blkmode_from_reg (0, target, TREE_TYPE (TREE_TYPE (fndecl)));
1319 if (structure_value_addr)
1321 target = gen_rtx_MEM (TYPE_MODE (type),
1322 memory_address (TYPE_MODE (type),
1323 structure_value_addr));
1324 set_mem_attributes (target, type, 1);
1327 /* Make sure we free the things we explicitly allocated with xmalloc. */
1329 free (real_label_map);
1330 VARRAY_FREE (map->const_equiv_varray);
1331 free (map->reg_map);
1332 free (map->insn_map);
1337 inlining = inlining_previous;
1342 /* Make copies of each insn in the given list using the mapping
1343 computed in expand_inline_function. This function may call itself for
1344 insns containing sequences.
1346 Copying is done in two passes, first the insns and then their REG_NOTES.
1348 If static_chain_value is nonzero, it represents the context-pointer
1349 register for the function. */
1352 copy_insn_list (insns, map, static_chain_value)
1354 struct inline_remap *map;
1355 rtx static_chain_value;
1363 rtx static_chain_mem = 0;
1365 /* Copy the insns one by one. Do this in two passes, first the insns and
1366 then their REG_NOTES. */
1368 /* This loop is very similar to the loop in copy_loop_body in unroll.c. */
1370 for (insn = insns; insn; insn = NEXT_INSN (insn))
1372 rtx copy, pattern, set;
1374 map->orig_asm_operands_vector = 0;
1376 switch (GET_CODE (insn))
1379 pattern = PATTERN (insn);
1380 set = single_set (insn);
1382 if (GET_CODE (pattern) == USE
1383 && GET_CODE (XEXP (pattern, 0)) == REG
1384 && REG_FUNCTION_VALUE_P (XEXP (pattern, 0)))
1385 /* The (USE (REG n)) at return from the function should
1386 be ignored since we are changing (REG n) into
1390 /* Ignore setting a function value that we don't want to use. */
1391 if (map->inline_target == 0
1393 && GET_CODE (SET_DEST (set)) == REG
1394 && REG_FUNCTION_VALUE_P (SET_DEST (set)))
1396 if (volatile_refs_p (SET_SRC (set)))
1400 /* If we must not delete the source,
1401 load it into a new temporary. */
1402 copy = emit_insn (copy_rtx_and_substitute (pattern, map, 0));
1404 new_set = single_set (copy);
1409 = gen_reg_rtx (GET_MODE (SET_DEST (new_set)));
1411 /* If the source and destination are the same and it
1412 has a note on it, keep the insn. */
1413 else if (rtx_equal_p (SET_DEST (set), SET_SRC (set))
1414 && REG_NOTES (insn) != 0)
1415 copy = emit_insn (copy_rtx_and_substitute (pattern, map, 0));
1420 /* Similarly if an ignored return value is clobbered. */
1421 else if (map->inline_target == 0
1422 && GET_CODE (pattern) == CLOBBER
1423 && GET_CODE (XEXP (pattern, 0)) == REG
1424 && REG_FUNCTION_VALUE_P (XEXP (pattern, 0)))
1427 /* Look for the address of the static chain slot. The
1428 rtx_equal_p comparisons against the
1429 static_chain_incoming_rtx below may fail if the static
1430 chain is in memory and the address specified is not
1431 "legitimate". This happens on Xtensa where the static
1432 chain is at a negative offset from argp and where only
1433 positive offsets are legitimate. When the RTL is
1434 generated, the address is "legitimized" by copying it
1435 into a register, causing the rtx_equal_p comparisons to
1436 fail. This workaround looks for code that sets a
1437 register to the address of the static chain. Subsequent
1438 memory references via that register can then be
1439 identified as static chain references. We assume that
1440 the register is only assigned once, and that the static
1441 chain address is only live in one register at a time. */
1443 else if (static_chain_value != 0
1445 && GET_CODE (static_chain_incoming_rtx) == MEM
1446 && GET_CODE (SET_DEST (set)) == REG
1447 && rtx_equal_p (SET_SRC (set),
1448 XEXP (static_chain_incoming_rtx, 0)))
1451 gen_rtx_MEM (GET_MODE (static_chain_incoming_rtx),
1454 /* emit the instruction in case it is used for something
1455 other than setting the static chain; if it's not used,
1456 it can always be removed as dead code */
1457 copy = emit_insn (copy_rtx_and_substitute (pattern, map, 0));
1460 /* If this is setting the static chain rtx, omit it. */
1461 else if (static_chain_value != 0
1463 && (rtx_equal_p (SET_DEST (set),
1464 static_chain_incoming_rtx)
1465 || (static_chain_mem
1466 && rtx_equal_p (SET_DEST (set), static_chain_mem))))
1469 /* If this is setting the static chain pseudo, set it from
1470 the value we want to give it instead. */
1471 else if (static_chain_value != 0
1473 && (rtx_equal_p (SET_SRC (set),
1474 static_chain_incoming_rtx)
1475 || (static_chain_mem
1476 && rtx_equal_p (SET_SRC (set), static_chain_mem))))
1478 rtx newdest = copy_rtx_and_substitute (SET_DEST (set), map, 1);
1480 copy = emit_move_insn (newdest, static_chain_value);
1481 if (GET_CODE (static_chain_incoming_rtx) != MEM)
1482 static_chain_value = 0;
1485 /* If this is setting the virtual stack vars register, this must
1486 be the code at the handler for a builtin longjmp. The value
1487 saved in the setjmp buffer will be the address of the frame
1488 we've made for this inlined instance within our frame. But we
1489 know the offset of that value so we can use it to reconstruct
1490 our virtual stack vars register from that value. If we are
1491 copying it from the stack pointer, leave it unchanged. */
1493 && rtx_equal_p (SET_DEST (set), virtual_stack_vars_rtx))
1495 HOST_WIDE_INT offset;
1496 temp = map->reg_map[REGNO (SET_DEST (set))];
1497 temp = VARRAY_CONST_EQUIV (map->const_equiv_varray,
1500 if (rtx_equal_p (temp, virtual_stack_vars_rtx))
1502 else if (GET_CODE (temp) == PLUS
1503 && rtx_equal_p (XEXP (temp, 0), virtual_stack_vars_rtx)
1504 && GET_CODE (XEXP (temp, 1)) == CONST_INT)
1505 offset = INTVAL (XEXP (temp, 1));
1509 if (rtx_equal_p (SET_SRC (set), stack_pointer_rtx))
1510 temp = SET_SRC (set);
1512 temp = force_operand (plus_constant (SET_SRC (set),
1516 copy = emit_move_insn (virtual_stack_vars_rtx, temp);
1520 copy = emit_insn (copy_rtx_and_substitute (pattern, map, 0));
1521 /* REG_NOTES will be copied later. */
1524 /* If this insn is setting CC0, it may need to look at
1525 the insn that uses CC0 to see what type of insn it is.
1526 In that case, the call to recog via validate_change will
1527 fail. So don't substitute constants here. Instead,
1528 do it when we emit the following insn.
1530 For example, see the pyr.md file. That machine has signed and
1531 unsigned compares. The compare patterns must check the
1532 following branch insn to see which what kind of compare to
1535 If the previous insn set CC0, substitute constants on it as
1537 if (sets_cc0_p (PATTERN (copy)) != 0)
1542 try_constants (cc0_insn, map);
1544 try_constants (copy, map);
1547 try_constants (copy, map);
1549 INSN_LOCATOR (copy) = INSN_LOCATOR (insn);
1553 if (map->integrating && returnjump_p (insn))
1555 if (map->local_return_label == 0)
1556 map->local_return_label = gen_label_rtx ();
1557 pattern = gen_jump (map->local_return_label);
1560 pattern = copy_rtx_and_substitute (PATTERN (insn), map, 0);
1562 copy = emit_jump_insn (pattern);
1566 try_constants (cc0_insn, map);
1569 try_constants (copy, map);
1570 INSN_LOCATOR (copy) = INSN_LOCATOR (insn);
1572 /* If this used to be a conditional jump insn but whose branch
1573 direction is now know, we must do something special. */
1574 if (any_condjump_p (insn) && onlyjump_p (insn) && map->last_pc_value)
1577 /* If the previous insn set cc0 for us, delete it. */
1578 if (only_sets_cc0_p (PREV_INSN (copy)))
1579 delete_related_insns (PREV_INSN (copy));
1582 /* If this is now a no-op, delete it. */
1583 if (map->last_pc_value == pc_rtx)
1585 delete_related_insns (copy);
1589 /* Otherwise, this is unconditional jump so we must put a
1590 BARRIER after it. We could do some dead code elimination
1591 here, but jump.c will do it just as well. */
1597 /* If this is a CALL_PLACEHOLDER insn then we need to copy the
1598 three attached sequences: normal call, sibling call and tail
1600 if (GET_CODE (PATTERN (insn)) == CALL_PLACEHOLDER)
1605 for (i = 0; i < 3; i++)
1609 sequence[i] = NULL_RTX;
1610 seq = XEXP (PATTERN (insn), i);
1614 copy_insn_list (seq, map, static_chain_value);
1615 sequence[i] = get_insns ();
1620 /* Find the new tail recursion label.
1621 It will already be substituted into sequence[2]. */
1622 tail_label = copy_rtx_and_substitute (XEXP (PATTERN (insn), 3),
1625 copy = emit_call_insn (gen_rtx_CALL_PLACEHOLDER (VOIDmode,
1633 pattern = copy_rtx_and_substitute (PATTERN (insn), map, 0);
1634 copy = emit_call_insn (pattern);
1636 SIBLING_CALL_P (copy) = SIBLING_CALL_P (insn);
1637 CONST_OR_PURE_CALL_P (copy) = CONST_OR_PURE_CALL_P (insn);
1638 INSN_LOCATOR (copy) = INSN_LOCATOR (insn);
1640 /* Because the USAGE information potentially contains objects other
1641 than hard registers, we need to copy it. */
1643 CALL_INSN_FUNCTION_USAGE (copy)
1644 = copy_rtx_and_substitute (CALL_INSN_FUNCTION_USAGE (insn),
1649 try_constants (cc0_insn, map);
1652 try_constants (copy, map);
1654 /* Be lazy and assume CALL_INSNs clobber all hard registers. */
1655 for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
1656 VARRAY_CONST_EQUIV (map->const_equiv_varray, i).rtx = 0;
1660 copy = emit_label (get_label_from_map (map,
1661 CODE_LABEL_NUMBER (insn)));
1662 LABEL_NAME (copy) = LABEL_NAME (insn);
1667 copy = emit_barrier ();
1671 if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_DELETED_LABEL)
1673 copy = emit_label (get_label_from_map (map,
1674 CODE_LABEL_NUMBER (insn)));
1675 LABEL_NAME (copy) = NOTE_SOURCE_FILE (insn);
1680 /* NOTE_INSN_FUNCTION_END and NOTE_INSN_FUNCTION_BEG are
1681 discarded because it is important to have only one of
1682 each in the current function.
1684 NOTE_INSN_DELETED notes aren't useful. */
1686 if (NOTE_LINE_NUMBER (insn) > 0)
1687 copy = emit_line_note (NOTE_SOURCE_FILE (insn),
1688 NOTE_LINE_NUMBER (insn));
1689 else if (NOTE_LINE_NUMBER (insn) != NOTE_INSN_FUNCTION_END
1690 && NOTE_LINE_NUMBER (insn) != NOTE_INSN_FUNCTION_BEG
1691 && NOTE_LINE_NUMBER (insn) != NOTE_INSN_DELETED)
1693 copy = emit_note (NULL, NOTE_LINE_NUMBER (insn));
1694 NOTE_DATA (copy) = NOTE_DATA (insn);
1695 if ((NOTE_LINE_NUMBER (copy) == NOTE_INSN_BLOCK_BEG
1696 || NOTE_LINE_NUMBER (copy) == NOTE_INSN_BLOCK_END)
1697 && NOTE_BLOCK (insn))
1699 tree *mapped_block_p;
1702 = (tree *) bsearch (NOTE_BLOCK (insn),
1703 &VARRAY_TREE (map->block_map, 0),
1704 map->block_map->elements_used,
1708 if (!mapped_block_p)
1711 NOTE_BLOCK (copy) = *mapped_block_p;
1713 else if (NOTE_LINE_NUMBER (copy) == NOTE_INSN_EXPECTED_VALUE)
1714 NOTE_EXPECTED_VALUE (copy)
1715 = copy_rtx_and_substitute (NOTE_EXPECTED_VALUE (insn),
1727 RTX_INTEGRATED_P (copy) = 1;
1729 map->insn_map[INSN_UID (insn)] = copy;
1733 /* Copy the REG_NOTES. Increment const_age, so that only constants
1734 from parameters can be substituted in. These are the only ones
1735 that are valid across the entire function. */
1738 copy_insn_notes (insns, map, eh_region_offset)
1740 struct inline_remap *map;
1741 int eh_region_offset;
1746 for (insn = insns; insn; insn = NEXT_INSN (insn))
1748 if (! INSN_P (insn))
1751 new_insn = map->insn_map[INSN_UID (insn)];
1755 if (REG_NOTES (insn))
1757 rtx next, note = copy_rtx_and_substitute (REG_NOTES (insn), map, 0);
1759 /* We must also do subst_constants, in case one of our parameters
1760 has const type and constant value. */
1761 subst_constants (¬e, NULL_RTX, map, 0);
1762 apply_change_group ();
1763 REG_NOTES (new_insn) = note;
1765 /* Delete any REG_LABEL notes from the chain. Remap any
1766 REG_EH_REGION notes. */
1767 for (; note; note = next)
1769 next = XEXP (note, 1);
1770 if (REG_NOTE_KIND (note) == REG_LABEL)
1771 remove_note (new_insn, note);
1772 else if (REG_NOTE_KIND (note) == REG_EH_REGION
1773 && INTVAL (XEXP (note, 0)) > 0)
1774 XEXP (note, 0) = GEN_INT (INTVAL (XEXP (note, 0))
1775 + eh_region_offset);
1779 if (GET_CODE (insn) == CALL_INSN
1780 && GET_CODE (PATTERN (insn)) == CALL_PLACEHOLDER)
1783 for (i = 0; i < 3; i++)
1784 copy_insn_notes (XEXP (PATTERN (insn), i), map, eh_region_offset);
1787 if (GET_CODE (insn) == JUMP_INSN
1788 && GET_CODE (PATTERN (insn)) == RESX)
1789 XINT (PATTERN (new_insn), 0) += eh_region_offset;
1793 /* Given a chain of PARM_DECLs, ARGS, copy each decl into a VAR_DECL,
1794 push all of those decls and give each one the corresponding home. */
1797 integrate_parm_decls (args, map, arg_vector)
1799 struct inline_remap *map;
1805 for (tail = args, i = 0; tail; tail = TREE_CHAIN (tail), i++)
1807 tree decl = copy_decl_for_inlining (tail, map->fndecl,
1808 current_function_decl);
1810 = copy_rtx_and_substitute (RTVEC_ELT (arg_vector, i), map, 1);
1812 /* We really should be setting DECL_INCOMING_RTL to something reasonable
1813 here, but that's going to require some more work. */
1814 /* DECL_INCOMING_RTL (decl) = ?; */
1815 /* Fully instantiate the address with the equivalent form so that the
1816 debugging information contains the actual register, instead of the
1817 virtual register. Do this by not passing an insn to
1819 subst_constants (&new_decl_rtl, NULL_RTX, map, 1);
1820 apply_change_group ();
1821 SET_DECL_RTL (decl, new_decl_rtl);
1825 /* Given a BLOCK node LET, push decls and levels so as to construct in the
1826 current function a tree of contexts isomorphic to the one that is given.
1828 MAP, if nonzero, is a pointer to an inline_remap map which indicates how
1829 registers used in the DECL_RTL field should be remapped. If it is zero,
1830 no mapping is necessary. */
1833 integrate_decl_tree (let, map)
1835 struct inline_remap *map;
1841 new_block = make_node (BLOCK);
1842 VARRAY_PUSH_TREE (map->block_map, new_block);
1843 next = &BLOCK_VARS (new_block);
1845 for (t = BLOCK_VARS (let); t; t = TREE_CHAIN (t))
1849 d = copy_decl_for_inlining (t, map->fndecl, current_function_decl);
1851 if (DECL_RTL_SET_P (t))
1855 SET_DECL_RTL (d, copy_rtx_and_substitute (DECL_RTL (t), map, 1));
1857 /* Fully instantiate the address with the equivalent form so that the
1858 debugging information contains the actual register, instead of the
1859 virtual register. Do this by not passing an insn to
1862 subst_constants (&r, NULL_RTX, map, 1);
1863 SET_DECL_RTL (d, r);
1865 apply_change_group ();
1868 /* Add this declaration to the list of variables in the new
1871 next = &TREE_CHAIN (d);
1874 next = &BLOCK_SUBBLOCKS (new_block);
1875 for (t = BLOCK_SUBBLOCKS (let); t; t = BLOCK_CHAIN (t))
1877 *next = integrate_decl_tree (t, map);
1878 BLOCK_SUPERCONTEXT (*next) = new_block;
1879 next = &BLOCK_CHAIN (*next);
1882 TREE_USED (new_block) = TREE_USED (let);
1883 BLOCK_ABSTRACT_ORIGIN (new_block) = let;
1888 /* Create a new copy of an rtx. Recursively copies the operands of the rtx,
1889 except for those few rtx codes that are sharable.
1891 We always return an rtx that is similar to that incoming rtx, with the
1892 exception of possibly changing a REG to a SUBREG or vice versa. No
1893 rtl is ever emitted.
1895 If FOR_LHS is nonzero, if means we are processing something that will
1896 be the LHS of a SET. In that case, we copy RTX_UNCHANGING_P even if
1897 inlining since we need to be conservative in how it is set for
1900 Handle constants that need to be placed in the constant pool by
1901 calling `force_const_mem'. */
1904 copy_rtx_and_substitute (orig, map, for_lhs)
1906 struct inline_remap *map;
1912 enum machine_mode mode;
1913 const char *format_ptr;
1919 code = GET_CODE (orig);
1920 mode = GET_MODE (orig);
1925 /* If the stack pointer register shows up, it must be part of
1926 stack-adjustments (*not* because we eliminated the frame pointer!).
1927 Small hard registers are returned as-is. Pseudo-registers
1928 go through their `reg_map'. */
1929 regno = REGNO (orig);
1930 if (regno <= LAST_VIRTUAL_REGISTER
1931 || (map->integrating
1932 && DECL_SAVED_INSNS (map->fndecl)->internal_arg_pointer == orig))
1934 /* Some hard registers are also mapped,
1935 but others are not translated. */
1936 if (map->reg_map[regno] != 0)
1937 return map->reg_map[regno];
1939 /* If this is the virtual frame pointer, make space in current
1940 function's stack frame for the stack frame of the inline function.
1942 Copy the address of this area into a pseudo. Map
1943 virtual_stack_vars_rtx to this pseudo and set up a constant
1944 equivalence for it to be the address. This will substitute the
1945 address into insns where it can be substituted and use the new
1946 pseudo where it can't. */
1947 else if (regno == VIRTUAL_STACK_VARS_REGNUM)
1950 int size = get_func_frame_size (DECL_SAVED_INSNS (map->fndecl));
1951 #ifdef FRAME_GROWS_DOWNWARD
1953 = (DECL_SAVED_INSNS (map->fndecl)->stack_alignment_needed
1956 /* In this case, virtual_stack_vars_rtx points to one byte
1957 higher than the top of the frame area. So make sure we
1958 allocate a big enough chunk to keep the frame pointer
1959 aligned like a real one. */
1961 size = CEIL_ROUND (size, alignment);
1964 loc = assign_stack_temp (BLKmode, size, 1);
1965 loc = XEXP (loc, 0);
1966 #ifdef FRAME_GROWS_DOWNWARD
1967 /* In this case, virtual_stack_vars_rtx points to one byte
1968 higher than the top of the frame area. So compute the offset
1969 to one byte higher than our substitute frame. */
1970 loc = plus_constant (loc, size);
1972 map->reg_map[regno] = temp
1973 = force_reg (Pmode, force_operand (loc, NULL_RTX));
1975 #ifdef STACK_BOUNDARY
1976 mark_reg_pointer (map->reg_map[regno], STACK_BOUNDARY);
1979 SET_CONST_EQUIV_DATA (map, temp, loc, CONST_AGE_PARM);
1983 emit_insn_after (seq, map->insns_at_start);
1986 else if (regno == VIRTUAL_INCOMING_ARGS_REGNUM
1987 || (map->integrating
1988 && (DECL_SAVED_INSNS (map->fndecl)->internal_arg_pointer
1991 /* Do the same for a block to contain any arguments referenced
1994 int size = DECL_SAVED_INSNS (map->fndecl)->args_size;
1997 loc = assign_stack_temp (BLKmode, size, 1);
1998 loc = XEXP (loc, 0);
1999 /* When arguments grow downward, the virtual incoming
2000 args pointer points to the top of the argument block,
2001 so the remapped location better do the same. */
2002 #ifdef ARGS_GROW_DOWNWARD
2003 loc = plus_constant (loc, size);
2005 map->reg_map[regno] = temp
2006 = force_reg (Pmode, force_operand (loc, NULL_RTX));
2008 #ifdef STACK_BOUNDARY
2009 mark_reg_pointer (map->reg_map[regno], STACK_BOUNDARY);
2012 SET_CONST_EQUIV_DATA (map, temp, loc, CONST_AGE_PARM);
2016 emit_insn_after (seq, map->insns_at_start);
2019 else if (REG_FUNCTION_VALUE_P (orig))
2021 /* This is a reference to the function return value. If
2022 the function doesn't have a return value, error. If the
2023 mode doesn't agree, and it ain't BLKmode, make a SUBREG. */
2024 if (map->inline_target == 0)
2026 if (rtx_equal_function_value_matters)
2027 /* This is an ignored return value. We must not
2028 leave it in with REG_FUNCTION_VALUE_P set, since
2029 that would confuse subsequent inlining of the
2030 current function into a later function. */
2031 return gen_rtx_REG (GET_MODE (orig), regno);
2033 /* Must be unrolling loops or replicating code if we
2034 reach here, so return the register unchanged. */
2037 else if (GET_MODE (map->inline_target) != BLKmode
2038 && mode != GET_MODE (map->inline_target))
2039 return gen_lowpart (mode, map->inline_target);
2041 return map->inline_target;
2043 #if defined (LEAF_REGISTERS) && defined (LEAF_REG_REMAP)
2044 /* If leaf_renumber_regs_insn() might remap this register to
2045 some other number, make sure we don't share it with the
2046 inlined function, otherwise delayed optimization of the
2047 inlined function may change it in place, breaking our
2048 reference to it. We may still shared it within the
2049 function, so create an entry for this register in the
2051 if (map->integrating && regno < FIRST_PSEUDO_REGISTER
2052 && LEAF_REGISTERS[regno] && LEAF_REG_REMAP (regno) != regno)
2054 if (!map->leaf_reg_map[regno][mode])
2055 map->leaf_reg_map[regno][mode] = gen_rtx_REG (mode, regno);
2056 return map->leaf_reg_map[regno][mode];
2064 if (map->reg_map[regno] == NULL)
2066 map->reg_map[regno] = gen_reg_rtx (mode);
2067 REG_USERVAR_P (map->reg_map[regno]) = REG_USERVAR_P (orig);
2068 REG_LOOP_TEST_P (map->reg_map[regno]) = REG_LOOP_TEST_P (orig);
2069 RTX_UNCHANGING_P (map->reg_map[regno]) = RTX_UNCHANGING_P (orig);
2070 /* A reg with REG_FUNCTION_VALUE_P true will never reach here. */
2072 if (REG_POINTER (map->x_regno_reg_rtx[regno]))
2073 mark_reg_pointer (map->reg_map[regno],
2074 map->regno_pointer_align[regno]);
2076 return map->reg_map[regno];
2079 copy = copy_rtx_and_substitute (SUBREG_REG (orig), map, for_lhs);
2080 return simplify_gen_subreg (GET_MODE (orig), copy,
2081 GET_MODE (SUBREG_REG (orig)),
2082 SUBREG_BYTE (orig));
2085 copy = gen_rtx_ADDRESSOF (mode,
2086 copy_rtx_and_substitute (XEXP (orig, 0),
2088 0, ADDRESSOF_DECL (orig));
2089 regno = ADDRESSOF_REGNO (orig);
2090 if (map->reg_map[regno])
2091 regno = REGNO (map->reg_map[regno]);
2092 else if (regno > LAST_VIRTUAL_REGISTER)
2094 temp = XEXP (orig, 0);
2095 map->reg_map[regno] = gen_reg_rtx (GET_MODE (temp));
2096 REG_USERVAR_P (map->reg_map[regno]) = REG_USERVAR_P (temp);
2097 REG_LOOP_TEST_P (map->reg_map[regno]) = REG_LOOP_TEST_P (temp);
2098 RTX_UNCHANGING_P (map->reg_map[regno]) = RTX_UNCHANGING_P (temp);
2099 /* A reg with REG_FUNCTION_VALUE_P true will never reach here. */
2101 /* Objects may initially be represented as registers, but
2102 but turned into a MEM if their address is taken by
2103 put_var_into_stack. Therefore, the register table may have
2104 entries which are MEMs.
2106 We briefly tried to clear such entries, but that ended up
2107 cascading into many changes due to the optimizers not being
2108 prepared for empty entries in the register table. So we've
2109 decided to allow the MEMs in the register table for now. */
2110 if (REG_P (map->x_regno_reg_rtx[regno])
2111 && REG_POINTER (map->x_regno_reg_rtx[regno]))
2112 mark_reg_pointer (map->reg_map[regno],
2113 map->regno_pointer_align[regno]);
2114 regno = REGNO (map->reg_map[regno]);
2116 ADDRESSOF_REGNO (copy) = regno;
2121 /* USE and CLOBBER are ordinary, but we convert (use (subreg foo))
2122 to (use foo) if the original insn didn't have a subreg.
2123 Removing the subreg distorts the VAX movstrhi pattern
2124 by changing the mode of an operand. */
2125 copy = copy_rtx_and_substitute (XEXP (orig, 0), map, code == CLOBBER);
2126 if (GET_CODE (copy) == SUBREG && GET_CODE (XEXP (orig, 0)) != SUBREG)
2127 copy = SUBREG_REG (copy);
2128 return gen_rtx_fmt_e (code, VOIDmode, copy);
2130 /* We need to handle "deleted" labels that appear in the DECL_RTL
2133 if (NOTE_LINE_NUMBER (orig) != NOTE_INSN_DELETED_LABEL)
2136 /* ... FALLTHRU ... */
2138 LABEL_PRESERVE_P (get_label_from_map (map, CODE_LABEL_NUMBER (orig)))
2139 = LABEL_PRESERVE_P (orig);
2140 return get_label_from_map (map, CODE_LABEL_NUMBER (orig));
2146 LABEL_REF_NONLOCAL_P (orig) ? XEXP (orig, 0)
2147 : get_label_from_map (map, CODE_LABEL_NUMBER (XEXP (orig, 0))));
2149 LABEL_OUTSIDE_LOOP_P (copy) = LABEL_OUTSIDE_LOOP_P (orig);
2151 /* The fact that this label was previously nonlocal does not mean
2152 it still is, so we must check if it is within the range of
2153 this function's labels. */
2154 LABEL_REF_NONLOCAL_P (copy)
2155 = (LABEL_REF_NONLOCAL_P (orig)
2156 && ! (CODE_LABEL_NUMBER (XEXP (copy, 0)) >= get_first_label_num ()
2157 && CODE_LABEL_NUMBER (XEXP (copy, 0)) < max_label_num ()));
2159 /* If we have made a nonlocal label local, it means that this
2160 inlined call will be referring to our nonlocal goto handler.
2161 So make sure we create one for this block; we normally would
2162 not since this is not otherwise considered a "call". */
2163 if (LABEL_REF_NONLOCAL_P (orig) && ! LABEL_REF_NONLOCAL_P (copy))
2164 function_call_count++;
2175 /* Symbols which represent the address of a label stored in the constant
2176 pool must be modified to point to a constant pool entry for the
2177 remapped label. Otherwise, symbols are returned unchanged. */
2178 if (CONSTANT_POOL_ADDRESS_P (orig))
2180 struct function *f = inlining ? inlining : cfun;
2181 rtx constant = get_pool_constant_for_function (f, orig);
2182 enum machine_mode const_mode = get_pool_mode_for_function (f, orig);
2185 rtx temp = force_const_mem (const_mode,
2186 copy_rtx_and_substitute (constant,
2190 /* Legitimizing the address here is incorrect.
2192 Since we had a SYMBOL_REF before, we can assume it is valid
2193 to have one in this position in the insn.
2195 Also, change_address may create new registers. These
2196 registers will not have valid reg_map entries. This can
2197 cause try_constants() to fail because assumes that all
2198 registers in the rtx have valid reg_map entries, and it may
2199 end up replacing one of these new registers with junk. */
2201 if (! memory_address_p (GET_MODE (temp), XEXP (temp, 0)))
2202 temp = change_address (temp, GET_MODE (temp), XEXP (temp, 0));
2205 temp = XEXP (temp, 0);
2207 #ifdef POINTERS_EXTEND_UNSIGNED
2208 if (GET_MODE (temp) != GET_MODE (orig))
2209 temp = convert_memory_address (GET_MODE (orig), temp);
2213 else if (GET_CODE (constant) == LABEL_REF)
2214 return XEXP (force_const_mem
2216 copy_rtx_and_substitute (constant, map, for_lhs)),
2219 else if (TREE_CONSTANT_POOL_ADDRESS_P (orig) && inlining)
2220 notice_rtl_inlining_of_deferred_constant ();
2225 /* We have to make a new copy of this CONST_DOUBLE because don't want
2226 to use the old value of CONST_DOUBLE_MEM. Also, this may be a
2227 duplicate of a CONST_DOUBLE we have already seen. */
2228 if (GET_MODE_CLASS (GET_MODE (orig)) == MODE_FLOAT)
2232 REAL_VALUE_FROM_CONST_DOUBLE (d, orig);
2233 return CONST_DOUBLE_FROM_REAL_VALUE (d, GET_MODE (orig));
2236 return immed_double_const (CONST_DOUBLE_LOW (orig),
2237 CONST_DOUBLE_HIGH (orig), VOIDmode);
2240 /* Make new constant pool entry for a constant
2241 that was in the pool of the inline function. */
2242 if (RTX_INTEGRATED_P (orig))
2247 /* If a single asm insn contains multiple output operands then
2248 it contains multiple ASM_OPERANDS rtx's that share the input
2249 and constraint vecs. We must make sure that the copied insn
2250 continues to share it. */
2251 if (map->orig_asm_operands_vector == ASM_OPERANDS_INPUT_VEC (orig))
2253 copy = rtx_alloc (ASM_OPERANDS);
2254 RTX_FLAG (copy, volatil) = RTX_FLAG (orig, volatil);
2255 PUT_MODE (copy, GET_MODE (orig));
2256 ASM_OPERANDS_TEMPLATE (copy) = ASM_OPERANDS_TEMPLATE (orig);
2257 ASM_OPERANDS_OUTPUT_CONSTRAINT (copy)
2258 = ASM_OPERANDS_OUTPUT_CONSTRAINT (orig);
2259 ASM_OPERANDS_OUTPUT_IDX (copy) = ASM_OPERANDS_OUTPUT_IDX (orig);
2260 ASM_OPERANDS_INPUT_VEC (copy) = map->copy_asm_operands_vector;
2261 ASM_OPERANDS_INPUT_CONSTRAINT_VEC (copy)
2262 = map->copy_asm_constraints_vector;
2263 ASM_OPERANDS_SOURCE_FILE (copy) = ASM_OPERANDS_SOURCE_FILE (orig);
2264 ASM_OPERANDS_SOURCE_LINE (copy) = ASM_OPERANDS_SOURCE_LINE (orig);
2270 /* This is given special treatment because the first
2271 operand of a CALL is a (MEM ...) which may get
2272 forced into a register for cse. This is undesirable
2273 if function-address cse isn't wanted or if we won't do cse. */
2274 #ifndef NO_FUNCTION_CSE
2275 if (! (optimize && ! flag_no_function_cse))
2279 = gen_rtx_MEM (GET_MODE (XEXP (orig, 0)),
2280 copy_rtx_and_substitute (XEXP (XEXP (orig, 0), 0),
2283 MEM_COPY_ATTRIBUTES (copy, XEXP (orig, 0));
2286 gen_rtx_CALL (GET_MODE (orig), copy,
2287 copy_rtx_and_substitute (XEXP (orig, 1), map, 0));
2292 /* Must be ifdefed out for loop unrolling to work. */
2298 /* If this is setting fp or ap, it means that we have a nonlocal goto.
2299 Adjust the setting by the offset of the area we made.
2300 If the nonlocal goto is into the current function,
2301 this will result in unnecessarily bad code, but should work. */
2302 if (SET_DEST (orig) == virtual_stack_vars_rtx
2303 || SET_DEST (orig) == virtual_incoming_args_rtx)
2305 /* In case a translation hasn't occurred already, make one now. */
2308 HOST_WIDE_INT loc_offset;
2310 copy_rtx_and_substitute (SET_DEST (orig), map, for_lhs);
2311 equiv_reg = map->reg_map[REGNO (SET_DEST (orig))];
2312 equiv_loc = VARRAY_CONST_EQUIV (map->const_equiv_varray,
2313 REGNO (equiv_reg)).rtx;
2315 = GET_CODE (equiv_loc) == REG ? 0 : INTVAL (XEXP (equiv_loc, 1));
2317 return gen_rtx_SET (VOIDmode, SET_DEST (orig),
2320 (copy_rtx_and_substitute (SET_SRC (orig),
2326 return gen_rtx_SET (VOIDmode,
2327 copy_rtx_and_substitute (SET_DEST (orig), map, 1),
2328 copy_rtx_and_substitute (SET_SRC (orig), map, 0));
2333 && GET_CODE (XEXP (orig, 0)) == SYMBOL_REF
2334 && CONSTANT_POOL_ADDRESS_P (XEXP (orig, 0)))
2336 enum machine_mode const_mode
2337 = get_pool_mode_for_function (inlining, XEXP (orig, 0));
2339 = get_pool_constant_for_function (inlining, XEXP (orig, 0));
2341 constant = copy_rtx_and_substitute (constant, map, 0);
2343 /* If this was an address of a constant pool entry that itself
2344 had to be placed in the constant pool, it might not be a
2345 valid address. So the recursive call might have turned it
2346 into a register. In that case, it isn't a constant any
2347 more, so return it. This has the potential of changing a
2348 MEM into a REG, but we'll assume that it safe. */
2349 if (! CONSTANT_P (constant))
2352 return validize_mem (force_const_mem (const_mode, constant));
2355 copy = gen_rtx_MEM (mode, copy_rtx_and_substitute (XEXP (orig, 0),
2357 MEM_COPY_ATTRIBUTES (copy, orig);
2359 /* If inlining and this is not for the LHS, turn off RTX_UNCHANGING_P
2360 since this may be an indirect reference to a parameter and the
2361 actual may not be readonly. */
2362 if (inlining && !for_lhs)
2363 RTX_UNCHANGING_P (copy) = 0;
2365 /* If inlining, squish aliasing data that references the subroutine's
2366 parameter list, since that's no longer applicable. */
2367 if (inlining && MEM_EXPR (copy)
2368 && TREE_CODE (MEM_EXPR (copy)) == INDIRECT_REF
2369 && TREE_CODE (TREE_OPERAND (MEM_EXPR (copy), 0)) == PARM_DECL)
2370 set_mem_expr (copy, NULL_TREE);
2378 copy = rtx_alloc (code);
2379 PUT_MODE (copy, mode);
2380 RTX_FLAG (copy, in_struct) = RTX_FLAG (orig, in_struct);
2381 RTX_FLAG (copy, volatil) = RTX_FLAG (orig, volatil);
2382 RTX_FLAG (copy, unchanging) = RTX_FLAG (orig, unchanging);
2384 format_ptr = GET_RTX_FORMAT (GET_CODE (copy));
2386 for (i = 0; i < GET_RTX_LENGTH (GET_CODE (copy)); i++)
2388 switch (*format_ptr++)
2391 /* Copy this through the wide int field; that's safest. */
2392 X0WINT (copy, i) = X0WINT (orig, i);
2397 = copy_rtx_and_substitute (XEXP (orig, i), map, for_lhs);
2401 /* Change any references to old-insns to point to the
2402 corresponding copied insns. */
2403 XEXP (copy, i) = map->insn_map[INSN_UID (XEXP (orig, i))];
2407 XVEC (copy, i) = XVEC (orig, i);
2408 if (XVEC (orig, i) != NULL && XVECLEN (orig, i) != 0)
2410 XVEC (copy, i) = rtvec_alloc (XVECLEN (orig, i));
2411 for (j = 0; j < XVECLEN (copy, i); j++)
2412 XVECEXP (copy, i, j)
2413 = copy_rtx_and_substitute (XVECEXP (orig, i, j),
2419 XWINT (copy, i) = XWINT (orig, i);
2423 XINT (copy, i) = XINT (orig, i);
2427 XSTR (copy, i) = XSTR (orig, i);
2431 XTREE (copy, i) = XTREE (orig, i);
2439 if (code == ASM_OPERANDS && map->orig_asm_operands_vector == 0)
2441 map->orig_asm_operands_vector = ASM_OPERANDS_INPUT_VEC (orig);
2442 map->copy_asm_operands_vector = ASM_OPERANDS_INPUT_VEC (copy);
2443 map->copy_asm_constraints_vector
2444 = ASM_OPERANDS_INPUT_CONSTRAINT_VEC (copy);
2450 /* Substitute known constant values into INSN, if that is valid. */
2453 try_constants (insn, map)
2455 struct inline_remap *map;
2461 /* First try just updating addresses, then other things. This is
2462 important when we have something like the store of a constant
2463 into memory and we can update the memory address but the machine
2464 does not support a constant source. */
2465 subst_constants (&PATTERN (insn), insn, map, 1);
2466 apply_change_group ();
2467 subst_constants (&PATTERN (insn), insn, map, 0);
2468 apply_change_group ();
2470 /* Enforce consistency between the addresses in the regular insn flow
2471 and the ones in CALL_INSN_FUNCTION_USAGE lists, if any. */
2472 if (GET_CODE (insn) == CALL_INSN && CALL_INSN_FUNCTION_USAGE (insn))
2474 subst_constants (&CALL_INSN_FUNCTION_USAGE (insn), insn, map, 1);
2475 apply_change_group ();
2478 /* Show we don't know the value of anything stored or clobbered. */
2479 note_stores (PATTERN (insn), mark_stores, NULL);
2480 map->last_pc_value = 0;
2482 map->last_cc0_value = 0;
2485 /* Set up any constant equivalences made in this insn. */
2486 for (i = 0; i < map->num_sets; i++)
2488 if (GET_CODE (map->equiv_sets[i].dest) == REG)
2490 int regno = REGNO (map->equiv_sets[i].dest);
2492 MAYBE_EXTEND_CONST_EQUIV_VARRAY (map, regno);
2493 if (VARRAY_CONST_EQUIV (map->const_equiv_varray, regno).rtx == 0
2494 /* Following clause is a hack to make case work where GNU C++
2495 reassigns a variable to make cse work right. */
2496 || ! rtx_equal_p (VARRAY_CONST_EQUIV (map->const_equiv_varray,
2498 map->equiv_sets[i].equiv))
2499 SET_CONST_EQUIV_DATA (map, map->equiv_sets[i].dest,
2500 map->equiv_sets[i].equiv, map->const_age);
2502 else if (map->equiv_sets[i].dest == pc_rtx)
2503 map->last_pc_value = map->equiv_sets[i].equiv;
2505 else if (map->equiv_sets[i].dest == cc0_rtx)
2506 map->last_cc0_value = map->equiv_sets[i].equiv;
2511 /* Substitute known constants for pseudo regs in the contents of LOC,
2512 which are part of INSN.
2513 If INSN is zero, the substitution should always be done (this is used to
2515 These changes are taken out by try_constants if the result is not valid.
2517 Note that we are more concerned with determining when the result of a SET
2518 is a constant, for further propagation, than actually inserting constants
2519 into insns; cse will do the latter task better.
2521 This function is also used to adjust address of items previously addressed
2522 via the virtual stack variable or virtual incoming arguments registers.
2524 If MEMONLY is nonzero, only make changes inside a MEM. */
2527 subst_constants (loc, insn, map, memonly)
2530 struct inline_remap *map;
2536 const char *format_ptr;
2537 int num_changes = num_validated_changes ();
2539 enum machine_mode op0_mode = MAX_MACHINE_MODE;
2541 code = GET_CODE (x);
2558 validate_change (insn, loc, map->last_cc0_value, 1);
2564 /* The only thing we can do with a USE or CLOBBER is possibly do
2565 some substitutions in a MEM within it. */
2566 if (GET_CODE (XEXP (x, 0)) == MEM)
2567 subst_constants (&XEXP (XEXP (x, 0), 0), insn, map, 0);
2571 /* Substitute for parms and known constants. Don't replace
2572 hard regs used as user variables with constants. */
2575 int regno = REGNO (x);
2576 struct const_equiv_data *p;
2578 if (! (regno < FIRST_PSEUDO_REGISTER && REG_USERVAR_P (x))
2579 && (size_t) regno < VARRAY_SIZE (map->const_equiv_varray)
2580 && (p = &VARRAY_CONST_EQUIV (map->const_equiv_varray, regno),
2582 && p->age >= map->const_age)
2583 validate_change (insn, loc, p->rtx, 1);
2588 /* SUBREG applied to something other than a reg
2589 should be treated as ordinary, since that must
2590 be a special hack and we don't know how to treat it specially.
2591 Consider for example mulsidi3 in m68k.md.
2592 Ordinary SUBREG of a REG needs this special treatment. */
2593 if (! memonly && GET_CODE (SUBREG_REG (x)) == REG)
2595 rtx inner = SUBREG_REG (x);
2598 /* We can't call subst_constants on &SUBREG_REG (x) because any
2599 constant or SUBREG wouldn't be valid inside our SUBEG. Instead,
2600 see what is inside, try to form the new SUBREG and see if that is
2601 valid. We handle two cases: extracting a full word in an
2602 integral mode and extracting the low part. */
2603 subst_constants (&inner, NULL_RTX, map, 0);
2604 new = simplify_gen_subreg (GET_MODE (x), inner,
2605 GET_MODE (SUBREG_REG (x)),
2609 validate_change (insn, loc, new, 1);
2611 cancel_changes (num_changes);
2618 subst_constants (&XEXP (x, 0), insn, map, 0);
2620 /* If a memory address got spoiled, change it back. */
2621 if (! memonly && insn != 0 && num_validated_changes () != num_changes
2622 && ! memory_address_p (GET_MODE (x), XEXP (x, 0)))
2623 cancel_changes (num_changes);
2628 /* Substitute constants in our source, and in any arguments to a
2629 complex (e..g, ZERO_EXTRACT) destination, but not in the destination
2631 rtx *dest_loc = &SET_DEST (x);
2632 rtx dest = *dest_loc;
2634 enum machine_mode compare_mode = VOIDmode;
2636 /* If SET_SRC is a COMPARE which subst_constants would turn into
2637 COMPARE of 2 VOIDmode constants, note the mode in which comparison
2639 if (GET_CODE (SET_SRC (x)) == COMPARE)
2642 if (GET_MODE_CLASS (GET_MODE (src)) == MODE_CC
2645 compare_mode = GET_MODE (XEXP (src, 0));
2646 if (compare_mode == VOIDmode)
2647 compare_mode = GET_MODE (XEXP (src, 1));
2651 subst_constants (&SET_SRC (x), insn, map, memonly);
2654 while (GET_CODE (*dest_loc) == ZERO_EXTRACT
2655 || GET_CODE (*dest_loc) == SUBREG
2656 || GET_CODE (*dest_loc) == STRICT_LOW_PART)
2658 if (GET_CODE (*dest_loc) == ZERO_EXTRACT)
2660 subst_constants (&XEXP (*dest_loc, 1), insn, map, memonly);
2661 subst_constants (&XEXP (*dest_loc, 2), insn, map, memonly);
2663 dest_loc = &XEXP (*dest_loc, 0);
2666 /* Do substitute in the address of a destination in memory. */
2667 if (GET_CODE (*dest_loc) == MEM)
2668 subst_constants (&XEXP (*dest_loc, 0), insn, map, 0);
2670 /* Check for the case of DEST a SUBREG, both it and the underlying
2671 register are less than one word, and the SUBREG has the wider mode.
2672 In the case, we are really setting the underlying register to the
2673 source converted to the mode of DEST. So indicate that. */
2674 if (GET_CODE (dest) == SUBREG
2675 && GET_MODE_SIZE (GET_MODE (dest)) <= UNITS_PER_WORD
2676 && GET_MODE_SIZE (GET_MODE (SUBREG_REG (dest))) <= UNITS_PER_WORD
2677 && (GET_MODE_SIZE (GET_MODE (SUBREG_REG (dest)))
2678 <= GET_MODE_SIZE (GET_MODE (dest)))
2679 && (tem = gen_lowpart_if_possible (GET_MODE (SUBREG_REG (dest)),
2681 src = tem, dest = SUBREG_REG (dest);
2683 /* If storing a recognizable value save it for later recording. */
2684 if ((map->num_sets < MAX_RECOG_OPERANDS)
2685 && (CONSTANT_P (src)
2686 || (GET_CODE (src) == REG
2687 && (REGNO (src) == VIRTUAL_INCOMING_ARGS_REGNUM
2688 || REGNO (src) == VIRTUAL_STACK_VARS_REGNUM))
2689 || (GET_CODE (src) == PLUS
2690 && GET_CODE (XEXP (src, 0)) == REG
2691 && (REGNO (XEXP (src, 0)) == VIRTUAL_INCOMING_ARGS_REGNUM
2692 || REGNO (XEXP (src, 0)) == VIRTUAL_STACK_VARS_REGNUM)
2693 && CONSTANT_P (XEXP (src, 1)))
2694 || GET_CODE (src) == COMPARE
2697 && (src == pc_rtx || GET_CODE (src) == RETURN
2698 || GET_CODE (src) == LABEL_REF))))
2700 /* Normally, this copy won't do anything. But, if SRC is a COMPARE
2701 it will cause us to save the COMPARE with any constants
2702 substituted, which is what we want for later. */
2703 rtx src_copy = copy_rtx (src);
2704 map->equiv_sets[map->num_sets].equiv = src_copy;
2705 map->equiv_sets[map->num_sets++].dest = dest;
2706 if (compare_mode != VOIDmode
2707 && GET_CODE (src) == COMPARE
2708 && (GET_MODE_CLASS (GET_MODE (src)) == MODE_CC
2710 && GET_MODE (XEXP (src, 0)) == VOIDmode
2711 && GET_MODE (XEXP (src, 1)) == VOIDmode)
2713 map->compare_src = src_copy;
2714 map->compare_mode = compare_mode;
2724 format_ptr = GET_RTX_FORMAT (code);
2726 /* If the first operand is an expression, save its mode for later. */
2727 if (*format_ptr == 'e')
2728 op0_mode = GET_MODE (XEXP (x, 0));
2730 for (i = 0; i < GET_RTX_LENGTH (code); i++)
2732 switch (*format_ptr++)
2739 subst_constants (&XEXP (x, i), insn, map, memonly);
2752 if (XVEC (x, i) != NULL && XVECLEN (x, i) != 0)
2753 for (j = 0; j < XVECLEN (x, i); j++)
2754 subst_constants (&XVECEXP (x, i, j), insn, map, memonly);
2763 /* If this is a commutative operation, move a constant to the second
2764 operand unless the second operand is already a CONST_INT. */
2766 && (GET_RTX_CLASS (code) == 'c' || code == NE || code == EQ)
2767 && CONSTANT_P (XEXP (x, 0)) && GET_CODE (XEXP (x, 1)) != CONST_INT)
2769 rtx tem = XEXP (x, 0);
2770 validate_change (insn, &XEXP (x, 0), XEXP (x, 1), 1);
2771 validate_change (insn, &XEXP (x, 1), tem, 1);
2774 /* Simplify the expression in case we put in some constants. */
2776 switch (GET_RTX_CLASS (code))
2779 if (op0_mode == MAX_MACHINE_MODE)
2781 new = simplify_unary_operation (code, GET_MODE (x),
2782 XEXP (x, 0), op0_mode);
2787 enum machine_mode op_mode = GET_MODE (XEXP (x, 0));
2789 if (op_mode == VOIDmode)
2790 op_mode = GET_MODE (XEXP (x, 1));
2791 new = simplify_relational_operation (code, op_mode,
2792 XEXP (x, 0), XEXP (x, 1));
2793 #ifdef FLOAT_STORE_FLAG_VALUE
2794 if (new != 0 && GET_MODE_CLASS (GET_MODE (x)) == MODE_FLOAT)
2796 enum machine_mode mode = GET_MODE (x);
2797 if (new == const0_rtx)
2798 new = CONST0_RTX (mode);
2801 REAL_VALUE_TYPE val;
2803 /* Avoid automatic aggregate initialization. */
2804 val = FLOAT_STORE_FLAG_VALUE (mode);
2805 new = CONST_DOUBLE_FROM_REAL_VALUE (val, mode);
2814 new = simplify_binary_operation (code, GET_MODE (x),
2815 XEXP (x, 0), XEXP (x, 1));
2820 if (op0_mode == MAX_MACHINE_MODE)
2823 if (code == IF_THEN_ELSE)
2825 rtx op0 = XEXP (x, 0);
2827 if (GET_RTX_CLASS (GET_CODE (op0)) == '<'
2828 && GET_MODE (op0) == VOIDmode
2829 && ! side_effects_p (op0)
2830 && XEXP (op0, 0) == map->compare_src
2831 && GET_MODE (XEXP (op0, 1)) == VOIDmode)
2833 /* We have compare of two VOIDmode constants for which
2834 we recorded the comparison mode. */
2836 simplify_relational_operation (GET_CODE (op0),
2841 if (temp == const0_rtx)
2843 else if (temp == const1_rtx)
2848 new = simplify_ternary_operation (code, GET_MODE (x), op0_mode,
2849 XEXP (x, 0), XEXP (x, 1),
2855 validate_change (insn, loc, new, 1);
2858 /* Show that register modified no longer contain known constants. We are
2859 called from note_stores with parts of the new insn. */
2862 mark_stores (dest, x, data)
2864 rtx x ATTRIBUTE_UNUSED;
2865 void *data ATTRIBUTE_UNUSED;
2868 enum machine_mode mode = VOIDmode;
2870 /* DEST is always the innermost thing set, except in the case of
2871 SUBREGs of hard registers. */
2873 if (GET_CODE (dest) == REG)
2874 regno = REGNO (dest), mode = GET_MODE (dest);
2875 else if (GET_CODE (dest) == SUBREG && GET_CODE (SUBREG_REG (dest)) == REG)
2877 regno = REGNO (SUBREG_REG (dest));
2878 if (regno < FIRST_PSEUDO_REGISTER)
2879 regno += subreg_regno_offset (REGNO (SUBREG_REG (dest)),
2880 GET_MODE (SUBREG_REG (dest)),
2883 mode = GET_MODE (SUBREG_REG (dest));
2888 unsigned int uregno = regno;
2889 unsigned int last_reg = (uregno >= FIRST_PSEUDO_REGISTER ? uregno
2890 : uregno + HARD_REGNO_NREGS (uregno, mode) - 1);
2893 /* Ignore virtual stack var or virtual arg register since those
2894 are handled separately. */
2895 if (uregno != VIRTUAL_INCOMING_ARGS_REGNUM
2896 && uregno != VIRTUAL_STACK_VARS_REGNUM)
2897 for (i = uregno; i <= last_reg; i++)
2898 if ((size_t) i < VARRAY_SIZE (global_const_equiv_varray))
2899 VARRAY_CONST_EQUIV (global_const_equiv_varray, i).rtx = 0;
2903 /* Given a pointer to some BLOCK node, if the BLOCK_ABSTRACT_ORIGIN for the
2904 given BLOCK node is NULL, set the BLOCK_ABSTRACT_ORIGIN for the node so
2905 that it points to the node itself, thus indicating that the node is its
2906 own (abstract) origin. Additionally, if the BLOCK_ABSTRACT_ORIGIN for
2907 the given node is NULL, recursively descend the decl/block tree which
2908 it is the root of, and for each other ..._DECL or BLOCK node contained
2909 therein whose DECL_ABSTRACT_ORIGINs or BLOCK_ABSTRACT_ORIGINs are also
2910 still NULL, set *their* DECL_ABSTRACT_ORIGIN or BLOCK_ABSTRACT_ORIGIN
2911 values to point to themselves. */
2914 set_block_origin_self (stmt)
2917 if (BLOCK_ABSTRACT_ORIGIN (stmt) == NULL_TREE)
2919 BLOCK_ABSTRACT_ORIGIN (stmt) = stmt;
2924 for (local_decl = BLOCK_VARS (stmt);
2925 local_decl != NULL_TREE;
2926 local_decl = TREE_CHAIN (local_decl))
2927 set_decl_origin_self (local_decl); /* Potential recursion. */
2933 for (subblock = BLOCK_SUBBLOCKS (stmt);
2934 subblock != NULL_TREE;
2935 subblock = BLOCK_CHAIN (subblock))
2936 set_block_origin_self (subblock); /* Recurse. */
2941 /* Given a pointer to some ..._DECL node, if the DECL_ABSTRACT_ORIGIN for
2942 the given ..._DECL node is NULL, set the DECL_ABSTRACT_ORIGIN for the
2943 node to so that it points to the node itself, thus indicating that the
2944 node represents its own (abstract) origin. Additionally, if the
2945 DECL_ABSTRACT_ORIGIN for the given node is NULL, recursively descend
2946 the decl/block tree of which the given node is the root of, and for
2947 each other ..._DECL or BLOCK node contained therein whose
2948 DECL_ABSTRACT_ORIGINs or BLOCK_ABSTRACT_ORIGINs are also still NULL,
2949 set *their* DECL_ABSTRACT_ORIGIN or BLOCK_ABSTRACT_ORIGIN values to
2950 point to themselves. */
2953 set_decl_origin_self (decl)
2956 if (DECL_ABSTRACT_ORIGIN (decl) == NULL_TREE)
2958 DECL_ABSTRACT_ORIGIN (decl) = decl;
2959 if (TREE_CODE (decl) == FUNCTION_DECL)
2963 for (arg = DECL_ARGUMENTS (decl); arg; arg = TREE_CHAIN (arg))
2964 DECL_ABSTRACT_ORIGIN (arg) = arg;
2965 if (DECL_INITIAL (decl) != NULL_TREE
2966 && DECL_INITIAL (decl) != error_mark_node)
2967 set_block_origin_self (DECL_INITIAL (decl));
2972 /* Given a pointer to some BLOCK node, and a boolean value to set the
2973 "abstract" flags to, set that value into the BLOCK_ABSTRACT flag for
2974 the given block, and for all local decls and all local sub-blocks
2975 (recursively) which are contained therein. */
2978 set_block_abstract_flags (stmt, setting)
2985 BLOCK_ABSTRACT (stmt) = setting;
2987 for (local_decl = BLOCK_VARS (stmt);
2988 local_decl != NULL_TREE;
2989 local_decl = TREE_CHAIN (local_decl))
2990 set_decl_abstract_flags (local_decl, setting);
2992 for (subblock = BLOCK_SUBBLOCKS (stmt);
2993 subblock != NULL_TREE;
2994 subblock = BLOCK_CHAIN (subblock))
2995 set_block_abstract_flags (subblock, setting);
2998 /* Given a pointer to some ..._DECL node, and a boolean value to set the
2999 "abstract" flags to, set that value into the DECL_ABSTRACT flag for the
3000 given decl, and (in the case where the decl is a FUNCTION_DECL) also
3001 set the abstract flags for all of the parameters, local vars, local
3002 blocks and sub-blocks (recursively) to the same setting. */
3005 set_decl_abstract_flags (decl, setting)
3009 DECL_ABSTRACT (decl) = setting;
3010 if (TREE_CODE (decl) == FUNCTION_DECL)
3014 for (arg = DECL_ARGUMENTS (decl); arg; arg = TREE_CHAIN (arg))
3015 DECL_ABSTRACT (arg) = setting;
3016 if (DECL_INITIAL (decl) != NULL_TREE
3017 && DECL_INITIAL (decl) != error_mark_node)
3018 set_block_abstract_flags (DECL_INITIAL (decl), setting);
3022 /* Output the assembly language code for the function FNDECL
3023 from its DECL_SAVED_INSNS. Used for inline functions that are output
3024 at end of compilation instead of where they came in the source. */
3026 static GTY(()) struct function *old_cfun;
3029 output_inline_function (fndecl)
3032 enum debug_info_type old_write_symbols = write_symbols;
3033 const struct gcc_debug_hooks *const old_debug_hooks = debug_hooks;
3034 struct function *f = DECL_SAVED_INSNS (fndecl);
3038 current_function_decl = fndecl;
3040 set_new_last_label_num (f->inl_max_label_num);
3042 /* We're not deferring this any longer. */
3043 DECL_DEFER_OUTPUT (fndecl) = 0;
3045 /* If requested, suppress debugging information. */
3046 if (f->no_debugging_symbols)
3048 write_symbols = NO_DEBUG;
3049 debug_hooks = &do_nothing_debug_hooks;
3052 /* Make sure warnings emitted by the optimizers (e.g. control reaches
3053 end of non-void function) is not wildly incorrect. */
3054 input_location = DECL_SOURCE_LOCATION (fndecl);
3056 /* Compile this function all the way down to assembly code. As a
3057 side effect this destroys the saved RTL representation, but
3058 that's okay, because we don't need to inline this anymore. */
3059 rest_of_compilation (fndecl);
3060 DECL_INLINE (fndecl) = 0;
3063 current_function_decl = old_cfun ? old_cfun->decl : 0;
3064 write_symbols = old_write_symbols;
3065 debug_hooks = old_debug_hooks;
3069 /* Functions to keep track of the values hard regs had at the start of
3073 get_hard_reg_initial_reg (fun, reg)
3074 struct function *fun;
3077 struct initial_value_struct *ivs = fun->hard_reg_initial_vals;
3083 for (i = 0; i < ivs->num_entries; i++)
3084 if (rtx_equal_p (ivs->entries[i].pseudo, reg))
3085 return ivs->entries[i].hard_reg;
3091 has_func_hard_reg_initial_val (fun, reg)
3092 struct function *fun;
3095 struct initial_value_struct *ivs = fun->hard_reg_initial_vals;
3101 for (i = 0; i < ivs->num_entries; i++)
3102 if (rtx_equal_p (ivs->entries[i].hard_reg, reg))
3103 return ivs->entries[i].pseudo;
3109 get_func_hard_reg_initial_val (fun, reg)
3110 struct function *fun;
3113 struct initial_value_struct *ivs = fun->hard_reg_initial_vals;
3114 rtx rv = has_func_hard_reg_initial_val (fun, reg);
3121 fun->hard_reg_initial_vals = (void *) ggc_alloc (sizeof (initial_value_struct));
3122 ivs = fun->hard_reg_initial_vals;
3123 ivs->num_entries = 0;
3124 ivs->max_entries = 5;
3125 ivs->entries = (initial_value_pair *) ggc_alloc (5 * sizeof (initial_value_pair));
3128 if (ivs->num_entries >= ivs->max_entries)
3130 ivs->max_entries += 5;
3132 (initial_value_pair *) ggc_realloc (ivs->entries,
3134 * sizeof (initial_value_pair));
3137 ivs->entries[ivs->num_entries].hard_reg = reg;
3138 ivs->entries[ivs->num_entries].pseudo = gen_reg_rtx (GET_MODE (reg));
3140 return ivs->entries[ivs->num_entries++].pseudo;
3144 get_hard_reg_initial_val (mode, regno)
3145 enum machine_mode mode;
3148 return get_func_hard_reg_initial_val (cfun, gen_rtx_REG (mode, regno));
3152 has_hard_reg_initial_val (mode, regno)
3153 enum machine_mode mode;
3156 return has_func_hard_reg_initial_val (cfun, gen_rtx_REG (mode, regno));
3160 setup_initial_hard_reg_value_integration (inl_f, remap)
3161 struct function *inl_f;
3162 struct inline_remap *remap;
3164 struct initial_value_struct *ivs = inl_f->hard_reg_initial_vals;
3170 for (i = 0; i < ivs->num_entries; i ++)
3171 remap->reg_map[REGNO (ivs->entries[i].pseudo)]
3172 = get_func_hard_reg_initial_val (cfun, ivs->entries[i].hard_reg);
3177 emit_initial_value_sets ()
3179 struct initial_value_struct *ivs = cfun->hard_reg_initial_vals;
3187 for (i = 0; i < ivs->num_entries; i++)
3188 emit_move_insn (ivs->entries[i].pseudo, ivs->entries[i].hard_reg);
3192 emit_insn_after (seq, get_insns ());
3195 /* If the backend knows where to allocate pseudos for hard
3196 register initial values, register these allocations now. */
3198 allocate_initial_values (reg_equiv_memory_loc)
3199 rtx *reg_equiv_memory_loc ATTRIBUTE_UNUSED;
3201 #ifdef ALLOCATE_INITIAL_VALUE
3202 struct initial_value_struct *ivs = cfun->hard_reg_initial_vals;
3208 for (i = 0; i < ivs->num_entries; i++)
3210 int regno = REGNO (ivs->entries[i].pseudo);
3211 rtx x = ALLOCATE_INITIAL_VALUE (ivs->entries[i].hard_reg);
3213 if (x == NULL_RTX || REG_N_SETS (REGNO (ivs->entries[i].pseudo)) > 1)
3215 else if (GET_CODE (x) == MEM)
3216 reg_equiv_memory_loc[regno] = x;
3217 else if (GET_CODE (x) == REG)
3219 reg_renumber[regno] = REGNO (x);
3220 /* Poke the regno right into regno_reg_rtx
3221 so that even fixed regs are accepted. */
3222 REGNO (ivs->entries[i].pseudo) = REGNO (x);
3229 #include "gt-integrate.h"