1 /* Procedure integration for GNU CC.
2 Copyright (C) 1988, 1991, 1993, 1994 Free Software Foundation, Inc.
3 Contributed by Michael Tiemann (tiemann@cygnus.com)
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
28 #include "insn-config.h"
29 #include "insn-flags.h"
32 #include "integrate.h"
38 #define obstack_chunk_alloc xmalloc
39 #define obstack_chunk_free free
41 extern struct obstack *function_maybepermanent_obstack;
43 extern tree pushdecl ();
44 extern tree poplevel ();
46 /* Similar, but round to the next highest integer that meets the
48 #define CEIL_ROUND(VALUE,ALIGN) (((VALUE) + (ALIGN) - 1) & ~((ALIGN)- 1))
50 /* Default max number of insns a function can have and still be inline.
51 This is overridden on RISC machines. */
52 #ifndef INTEGRATE_THRESHOLD
53 #define INTEGRATE_THRESHOLD(DECL) \
54 (8 * (8 + list_length (DECL_ARGUMENTS (DECL))))
57 static rtx initialize_for_inline PROTO((tree, int, int, int, int));
58 static void finish_inline PROTO((tree, rtx));
59 static void adjust_copied_decl_tree PROTO((tree));
60 static tree copy_decl_list PROTO((tree));
61 static tree copy_decl_tree PROTO((tree));
62 static void copy_decl_rtls PROTO((tree));
63 static void save_constants PROTO((rtx *));
64 static void note_modified_parmregs PROTO((rtx, rtx));
65 static rtx copy_for_inline PROTO((rtx));
66 static void integrate_parm_decls PROTO((tree, struct inline_remap *, rtvec));
67 static void integrate_decl_tree PROTO((tree, int, struct inline_remap *));
68 static void subst_constants PROTO((rtx *, rtx, struct inline_remap *));
69 static void restore_constants PROTO((rtx *));
70 static void set_block_origin_self PROTO((tree));
71 static void set_decl_origin_self PROTO((tree));
72 static void set_block_abstract_flags PROTO((tree, int));
74 void set_decl_abstract_flags PROTO((tree, int));
76 /* Zero if the current function (whose FUNCTION_DECL is FNDECL)
77 is safe and reasonable to integrate into other functions.
78 Nonzero means value is a warning message with a single %s
79 for the function's name. */
82 function_cannot_inline_p (fndecl)
86 tree last = tree_last (TYPE_ARG_TYPES (TREE_TYPE (fndecl)));
87 int max_insns = INTEGRATE_THRESHOLD (fndecl);
88 register int ninsns = 0;
91 /* No inlines with varargs. `grokdeclarator' gives a warning
92 message about that if `inline' is specified. This code
93 it put in to catch the volunteers. */
94 if ((last && TREE_VALUE (last) != void_type_node)
95 || current_function_varargs)
96 return "varargs function cannot be inline";
98 if (current_function_calls_alloca)
99 return "function using alloca cannot be inline";
101 if (current_function_contains_functions)
102 return "function with nested functions cannot be inline";
104 /* If its not even close, don't even look. */
105 if (!DECL_INLINE (fndecl) && get_max_uid () > 3 * max_insns)
106 return "function too large to be inline";
109 /* Large stacks are OK now that inlined functions can share them. */
110 /* Don't inline functions with large stack usage,
111 since they can make other recursive functions burn up stack. */
112 if (!DECL_INLINE (fndecl) && get_frame_size () > 100)
113 return "function stack frame for inlining";
117 /* Don't inline functions which do not specify a function prototype and
118 have BLKmode argument or take the address of a parameter. */
119 for (parms = DECL_ARGUMENTS (fndecl); parms; parms = TREE_CHAIN (parms))
121 if (TYPE_MODE (TREE_TYPE (parms)) == BLKmode)
122 TREE_ADDRESSABLE (parms) = 1;
123 if (last == NULL_TREE && TREE_ADDRESSABLE (parms))
124 return "no prototype, and parameter address used; cannot be inline";
128 /* We can't inline functions that return structures
129 the old-fashioned PCC way, copying into a static block. */
130 if (current_function_returns_pcc_struct)
131 return "inline functions not supported for this return value type";
133 /* We can't inline functions that return structures of varying size. */
134 if (int_size_in_bytes (TREE_TYPE (TREE_TYPE (fndecl))) < 0)
135 return "function with varying-size return value cannot be inline";
137 /* Cannot inline a function with a varying size argument. */
138 for (parms = DECL_ARGUMENTS (fndecl); parms; parms = TREE_CHAIN (parms))
139 if (int_size_in_bytes (TREE_TYPE (parms)) < 0)
140 return "function with varying-size parameter cannot be inline";
142 if (!DECL_INLINE (fndecl) && get_max_uid () > max_insns)
144 for (ninsns = 0, insn = get_first_nonparm_insn (); insn && ninsns < max_insns;
145 insn = NEXT_INSN (insn))
147 if (GET_RTX_CLASS (GET_CODE (insn)) == 'i')
151 if (ninsns >= max_insns)
152 return "function too large to be inline";
155 /* We cannot inline this function if forced_labels is non-zero. This
156 implies that a label in this function was used as an initializer.
157 Because labels can not be duplicated, all labels in the function
158 will be renamed when it is inlined. However, there is no way to find
159 and fix all variables initialized with addresses of labels in this
160 function, hence inlining is impossible. */
163 return "function with label addresses used in initializers cannot inline";
165 /* We cannot inline a nested function that jumps to a nonlocal label. */
166 if (current_function_has_nonlocal_goto)
167 return "function with nonlocal goto cannot be inline";
172 /* Variables used within save_for_inline. */
174 /* Mapping from old pseudo-register to new pseudo-registers.
175 The first element of this map is reg_map[FIRST_PSEUDO_REGISTER].
176 It is allocated in `save_for_inline' and `expand_inline_function',
177 and deallocated on exit from each of those routines. */
180 /* Mapping from old code-labels to new code-labels.
181 The first element of this map is label_map[min_labelno].
182 It is allocated in `save_for_inline' and `expand_inline_function',
183 and deallocated on exit from each of those routines. */
184 static rtx *label_map;
186 /* Mapping from old insn uid's to copied insns.
187 It is allocated in `save_for_inline' and `expand_inline_function',
188 and deallocated on exit from each of those routines. */
189 static rtx *insn_map;
191 /* Map pseudo reg number into the PARM_DECL for the parm living in the reg.
192 Zero for a reg that isn't a parm's home.
193 Only reg numbers less than max_parm_reg are mapped here. */
194 static tree *parmdecl_map;
196 /* Keep track of first pseudo-register beyond those that are parms. */
197 static int max_parm_reg;
199 /* When an insn is being copied by copy_for_inline,
200 this is nonzero if we have copied an ASM_OPERANDS.
201 In that case, it is the original input-operand vector. */
202 static rtvec orig_asm_operands_vector;
204 /* When an insn is being copied by copy_for_inline,
205 this is nonzero if we have copied an ASM_OPERANDS.
206 In that case, it is the copied input-operand vector. */
207 static rtvec copy_asm_operands_vector;
209 /* Likewise, this is the copied constraints vector. */
210 static rtvec copy_asm_constraints_vector;
212 /* In save_for_inline, nonzero if past the parm-initialization insns. */
213 static int in_nonparm_insns;
215 /* Subroutine for `save_for_inline{copying,nocopy}'. Performs initialization
216 needed to save FNDECL's insns and info for future inline expansion. */
219 initialize_for_inline (fndecl, min_labelno, max_labelno, max_reg, copy)
226 int function_flags, i;
230 /* Compute the values of any flags we must restore when inlining this. */
233 = (current_function_calls_alloca * FUNCTION_FLAGS_CALLS_ALLOCA
234 + current_function_calls_setjmp * FUNCTION_FLAGS_CALLS_SETJMP
235 + current_function_calls_longjmp * FUNCTION_FLAGS_CALLS_LONGJMP
236 + current_function_returns_struct * FUNCTION_FLAGS_RETURNS_STRUCT
237 + current_function_returns_pcc_struct * FUNCTION_FLAGS_RETURNS_PCC_STRUCT
238 + current_function_needs_context * FUNCTION_FLAGS_NEEDS_CONTEXT
239 + current_function_has_nonlocal_label * FUNCTION_FLAGS_HAS_NONLOCAL_LABEL
240 + current_function_returns_pointer * FUNCTION_FLAGS_RETURNS_POINTER
241 + current_function_uses_const_pool * FUNCTION_FLAGS_USES_CONST_POOL
242 + current_function_uses_pic_offset_table * FUNCTION_FLAGS_USES_PIC_OFFSET_TABLE);
244 /* Clear out PARMDECL_MAP. It was allocated in the caller's frame. */
245 bzero ((char *) parmdecl_map, max_parm_reg * sizeof (tree));
246 arg_vector = rtvec_alloc (list_length (DECL_ARGUMENTS (fndecl)));
248 for (parms = DECL_ARGUMENTS (fndecl), i = 0;
250 parms = TREE_CHAIN (parms), i++)
252 rtx p = DECL_RTL (parms);
254 if (GET_CODE (p) == MEM && copy)
256 /* Copy the rtl so that modifications of the addresses
257 later in compilation won't affect this arg_vector.
258 Virtual register instantiation can screw the address
260 rtx new = copy_rtx (p);
262 /* Don't leave the old copy anywhere in this decl. */
263 if (DECL_RTL (parms) == DECL_INCOMING_RTL (parms)
264 || (GET_CODE (DECL_RTL (parms)) == MEM
265 && GET_CODE (DECL_INCOMING_RTL (parms)) == MEM
266 && (XEXP (DECL_RTL (parms), 0)
267 == XEXP (DECL_INCOMING_RTL (parms), 0))))
268 DECL_INCOMING_RTL (parms) = new;
269 DECL_RTL (parms) = new;
272 RTVEC_ELT (arg_vector, i) = p;
274 if (GET_CODE (p) == REG)
275 parmdecl_map[REGNO (p)] = parms;
276 else if (GET_CODE (p) == CONCAT)
278 rtx preal = gen_realpart (GET_MODE (XEXP (p, 0)), p);
279 rtx pimag = gen_imagpart (GET_MODE (preal), p);
281 if (GET_CODE (preal) == REG)
282 parmdecl_map[REGNO (preal)] = parms;
283 if (GET_CODE (pimag) == REG)
284 parmdecl_map[REGNO (pimag)] = parms;
287 /* This flag is cleared later
288 if the function ever modifies the value of the parm. */
289 TREE_READONLY (parms) = 1;
292 /* Assume we start out in the insns that set up the parameters. */
293 in_nonparm_insns = 0;
295 /* The list of DECL_SAVED_INSNS, starts off with a header which
296 contains the following information:
298 the first insn of the function (not including the insns that copy
299 parameters into registers).
300 the first parameter insn of the function,
301 the first label used by that function,
302 the last label used by that function,
303 the highest register number used for parameters,
304 the total number of registers used,
305 the size of the incoming stack area for parameters,
306 the number of bytes popped on return,
308 some flags that are used to restore compiler globals,
309 the value of current_function_outgoing_args_size,
310 the original argument vector,
311 and the original DECL_INITIAL. */
313 return gen_inline_header_rtx (NULL_RTX, NULL_RTX, min_labelno, max_labelno,
314 max_parm_reg, max_reg,
315 current_function_args_size,
316 current_function_pops_args,
317 stack_slot_list, function_flags,
318 current_function_outgoing_args_size,
319 arg_vector, (rtx) DECL_INITIAL (fndecl));
322 /* Subroutine for `save_for_inline{copying,nocopy}'. Finishes up the
323 things that must be done to make FNDECL expandable as an inline function.
324 HEAD contains the chain of insns to which FNDECL will expand. */
327 finish_inline (fndecl, head)
331 NEXT_INSN (head) = get_first_nonparm_insn ();
332 FIRST_PARM_INSN (head) = get_insns ();
333 DECL_SAVED_INSNS (fndecl) = head;
334 DECL_FRAME_SIZE (fndecl) = get_frame_size ();
335 DECL_INLINE (fndecl) = 1;
338 /* Adjust the BLOCK_END_NOTE pointers in a given copied DECL tree so that
339 they all point to the new (copied) rtxs. */
342 adjust_copied_decl_tree (block)
345 register tree subblock;
346 register rtx original_end;
348 original_end = BLOCK_END_NOTE (block);
351 BLOCK_END_NOTE (block) = (rtx) NOTE_SOURCE_FILE (original_end);
352 NOTE_SOURCE_FILE (original_end) = 0;
355 /* Process all subblocks. */
356 for (subblock = BLOCK_SUBBLOCKS (block);
358 subblock = TREE_CHAIN (subblock))
359 adjust_copied_decl_tree (subblock);
362 /* Make the insns and PARM_DECLs of the current function permanent
363 and record other information in DECL_SAVED_INSNS to allow inlining
364 of this function in subsequent calls.
366 This function is called when we are going to immediately compile
367 the insns for FNDECL. The insns in maybepermanent_obstack cannot be
368 modified by the compilation process, so we copy all of them to
369 new storage and consider the new insns to be the insn chain to be
370 compiled. Our caller (rest_of_compilation) saves the original
371 DECL_INITIAL and DECL_ARGUMENTS; here we copy them. */
374 save_for_inline_copying (fndecl)
377 rtx first_insn, last_insn, insn;
379 int max_labelno, min_labelno, i, len;
382 rtx first_nonparm_insn;
384 /* Make and emit a return-label if we have not already done so.
385 Do this before recording the bounds on label numbers. */
387 if (return_label == 0)
389 return_label = gen_label_rtx ();
390 emit_label (return_label);
393 /* Get some bounds on the labels and registers used. */
395 max_labelno = max_label_num ();
396 min_labelno = get_first_label_num ();
397 max_reg = max_reg_num ();
399 /* Set up PARMDECL_MAP which maps pseudo-reg number to its PARM_DECL.
400 Later we set TREE_READONLY to 0 if the parm is modified inside the fn.
401 Also set up ARG_VECTOR, which holds the unmodified DECL_RTX values
402 for the parms, prior to elimination of virtual registers.
403 These values are needed for substituting parms properly. */
405 max_parm_reg = max_parm_reg_num ();
406 parmdecl_map = (tree *) alloca (max_parm_reg * sizeof (tree));
408 head = initialize_for_inline (fndecl, min_labelno, max_labelno, max_reg, 1);
410 if (current_function_uses_const_pool)
412 /* Replace any constant pool references with the actual constant. We
413 will put the constants back in the copy made below. */
414 for (insn = get_insns (); insn; insn = NEXT_INSN (insn))
415 if (GET_RTX_CLASS (GET_CODE (insn)) == 'i')
417 save_constants (&PATTERN (insn));
418 if (REG_NOTES (insn))
419 save_constants (®_NOTES (insn));
422 /* Clear out the constant pool so that we can recreate it with the
423 copied constants below. */
424 init_const_rtx_hash_table ();
425 clear_const_double_mem ();
428 max_uid = INSN_UID (head);
430 /* We have now allocated all that needs to be allocated permanently
431 on the rtx obstack. Set our high-water mark, so that we
432 can free the rest of this when the time comes. */
436 /* Copy the chain insns of this function.
437 Install the copied chain as the insns of this function,
438 for continued compilation;
439 the original chain is recorded as the DECL_SAVED_INSNS
440 for inlining future calls. */
442 /* If there are insns that copy parms from the stack into pseudo registers,
443 those insns are not copied. `expand_inline_function' must
444 emit the correct code to handle such things. */
447 if (GET_CODE (insn) != NOTE)
449 first_insn = rtx_alloc (NOTE);
450 NOTE_SOURCE_FILE (first_insn) = NOTE_SOURCE_FILE (insn);
451 NOTE_LINE_NUMBER (first_insn) = NOTE_LINE_NUMBER (insn);
452 INSN_UID (first_insn) = INSN_UID (insn);
453 PREV_INSN (first_insn) = NULL;
454 NEXT_INSN (first_insn) = NULL;
455 last_insn = first_insn;
457 /* Each pseudo-reg in the old insn chain must have a unique rtx in the copy.
458 Make these new rtx's now, and install them in regno_reg_rtx, so they
459 will be the official pseudo-reg rtx's for the rest of compilation. */
461 reg_map = (rtx *) alloca ((max_reg + 1) * sizeof (rtx));
463 len = sizeof (struct rtx_def) + (GET_RTX_LENGTH (REG) - 1) * sizeof (rtunion);
464 for (i = max_reg - 1; i > LAST_VIRTUAL_REGISTER; i--)
465 reg_map[i] = (rtx)obstack_copy (function_maybepermanent_obstack,
466 regno_reg_rtx[i], len);
468 bcopy ((char *) (reg_map + LAST_VIRTUAL_REGISTER + 1),
469 (char *) (regno_reg_rtx + LAST_VIRTUAL_REGISTER + 1),
470 (max_reg - (LAST_VIRTUAL_REGISTER + 1)) * sizeof (rtx));
472 /* Likewise each label rtx must have a unique rtx as its copy. */
474 label_map = (rtx *)alloca ((max_labelno - min_labelno) * sizeof (rtx));
475 label_map -= min_labelno;
477 for (i = min_labelno; i < max_labelno; i++)
478 label_map[i] = gen_label_rtx ();
480 /* Record the mapping of old insns to copied insns. */
482 insn_map = (rtx *) alloca (max_uid * sizeof (rtx));
483 bzero ((char *) insn_map, max_uid * sizeof (rtx));
485 /* Get the insn which signals the end of parameter setup code. */
486 first_nonparm_insn = get_first_nonparm_insn ();
488 /* Copy any entries in regno_reg_rtx or DECL_RTLs that reference MEM
489 (the former occurs when a variable has its address taken)
490 since these may be shared and can be changed by virtual
491 register instantiation. DECL_RTL values for our arguments
492 have already been copied by initialize_for_inline. */
493 for (i = LAST_VIRTUAL_REGISTER + 1; i < max_reg; i++)
494 if (GET_CODE (regno_reg_rtx[i]) == MEM)
495 XEXP (regno_reg_rtx[i], 0)
496 = copy_for_inline (XEXP (regno_reg_rtx[i], 0));
498 /* Copy the tree of subblocks of the function, and the decls in them.
499 We will use the copy for compiling this function, then restore the original
500 subblocks and decls for use when inlining this function.
502 Several parts of the compiler modify BLOCK trees. In particular,
503 instantiate_virtual_regs will instantiate any virtual regs
504 mentioned in the DECL_RTLs of the decls, and loop
505 unrolling will replicate any BLOCK trees inside an unrolled loop.
507 The modified subblocks or DECL_RTLs would be incorrect for the original rtl
508 which we will use for inlining. The rtl might even contain pseudoregs
509 whose space has been freed. */
511 DECL_INITIAL (fndecl) = copy_decl_tree (DECL_INITIAL (fndecl));
512 DECL_ARGUMENTS (fndecl) = copy_decl_list (DECL_ARGUMENTS (fndecl));
514 /* Now copy each DECL_RTL which is a MEM,
515 so it is safe to modify their addresses. */
516 copy_decl_rtls (DECL_INITIAL (fndecl));
518 /* The fndecl node acts as its own progenitor, so mark it as such. */
519 DECL_ABSTRACT_ORIGIN (fndecl) = fndecl;
521 /* Now copy the chain of insns. Do this twice. The first copy the insn
522 itself and its body. The second time copy of REG_NOTES. This is because
523 a REG_NOTE may have a forward pointer to another insn. */
525 for (insn = NEXT_INSN (insn); insn; insn = NEXT_INSN (insn))
527 orig_asm_operands_vector = 0;
529 if (insn == first_nonparm_insn)
530 in_nonparm_insns = 1;
532 switch (GET_CODE (insn))
535 /* No need to keep these. */
536 if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_DELETED)
539 copy = rtx_alloc (NOTE);
540 NOTE_LINE_NUMBER (copy) = NOTE_LINE_NUMBER (insn);
541 if (NOTE_LINE_NUMBER (insn) != NOTE_INSN_BLOCK_END)
542 NOTE_SOURCE_FILE (copy) = NOTE_SOURCE_FILE (insn);
545 NOTE_SOURCE_FILE (insn) = (char *) copy;
546 NOTE_SOURCE_FILE (copy) = 0;
553 copy = rtx_alloc (GET_CODE (insn));
555 if (GET_CODE (insn) == CALL_INSN)
556 CALL_INSN_FUNCTION_USAGE (copy) =
557 copy_for_inline (CALL_INSN_FUNCTION_USAGE (insn));
559 PATTERN (copy) = copy_for_inline (PATTERN (insn));
560 INSN_CODE (copy) = -1;
561 LOG_LINKS (copy) = NULL_RTX;
562 RTX_INTEGRATED_P (copy) = RTX_INTEGRATED_P (insn);
566 copy = label_map[CODE_LABEL_NUMBER (insn)];
567 LABEL_NAME (copy) = LABEL_NAME (insn);
571 copy = rtx_alloc (BARRIER);
577 INSN_UID (copy) = INSN_UID (insn);
578 insn_map[INSN_UID (insn)] = copy;
579 NEXT_INSN (last_insn) = copy;
580 PREV_INSN (copy) = last_insn;
584 adjust_copied_decl_tree (DECL_INITIAL (fndecl));
586 /* Now copy the REG_NOTES. */
587 for (insn = NEXT_INSN (get_insns ()); insn; insn = NEXT_INSN (insn))
588 if (GET_RTX_CLASS (GET_CODE (insn)) == 'i'
589 && insn_map[INSN_UID(insn)])
590 REG_NOTES (insn_map[INSN_UID (insn)])
591 = copy_for_inline (REG_NOTES (insn));
593 NEXT_INSN (last_insn) = NULL;
595 finish_inline (fndecl, head);
597 set_new_first_and_last_insn (first_insn, last_insn);
600 /* Return a copy of a chain of nodes, chained through the TREE_CHAIN field.
601 For example, this can copy a list made of TREE_LIST nodes. While copying,
602 for each node copied which doesn't already have is DECL_ABSTRACT_ORIGIN
603 set to some non-zero value, set the DECL_ABSTRACT_ORIGIN of the copy to
604 point to the corresponding (abstract) original node. */
607 copy_decl_list (list)
611 register tree prev, next;
616 head = prev = copy_node (list);
617 if (DECL_ABSTRACT_ORIGIN (head) == NULL_TREE)
618 DECL_ABSTRACT_ORIGIN (head) = list;
619 next = TREE_CHAIN (list);
624 copy = copy_node (next);
625 if (DECL_ABSTRACT_ORIGIN (copy) == NULL_TREE)
626 DECL_ABSTRACT_ORIGIN (copy) = next;
627 TREE_CHAIN (prev) = copy;
629 next = TREE_CHAIN (next);
634 /* Make a copy of the entire tree of blocks BLOCK, and return it. */
637 copy_decl_tree (block)
640 tree t, vars, subblocks;
642 vars = copy_decl_list (BLOCK_VARS (block));
645 /* Process all subblocks. */
646 for (t = BLOCK_SUBBLOCKS (block); t; t = TREE_CHAIN (t))
648 tree copy = copy_decl_tree (t);
649 TREE_CHAIN (copy) = subblocks;
653 t = copy_node (block);
654 BLOCK_VARS (t) = vars;
655 BLOCK_SUBBLOCKS (t) = nreverse (subblocks);
656 /* If the BLOCK being cloned is already marked as having been instantiated
657 from something else, then leave that `origin' marking alone. Elsewise,
658 mark the clone as having originated from the BLOCK we are cloning. */
659 if (BLOCK_ABSTRACT_ORIGIN (t) == NULL_TREE)
660 BLOCK_ABSTRACT_ORIGIN (t) = block;
664 /* Copy DECL_RTLs in all decls in the given BLOCK node. */
667 copy_decl_rtls (block)
672 for (t = BLOCK_VARS (block); t; t = TREE_CHAIN (t))
673 if (DECL_RTL (t) && GET_CODE (DECL_RTL (t)) == MEM)
674 DECL_RTL (t) = copy_for_inline (DECL_RTL (t));
676 /* Process all subblocks. */
677 for (t = BLOCK_SUBBLOCKS (block); t; t = TREE_CHAIN (t))
681 /* Make the insns and PARM_DECLs of the current function permanent
682 and record other information in DECL_SAVED_INSNS to allow inlining
683 of this function in subsequent calls.
685 This routine need not copy any insns because we are not going
686 to immediately compile the insns in the insn chain. There
687 are two cases when we would compile the insns for FNDECL:
688 (1) when FNDECL is expanded inline, and (2) when FNDECL needs to
689 be output at the end of other compilation, because somebody took
690 its address. In the first case, the insns of FNDECL are copied
691 as it is expanded inline, so FNDECL's saved insns are not
692 modified. In the second case, FNDECL is used for the last time,
693 so modifying the rtl is not a problem.
695 ??? Actually, we do not verify that FNDECL is not inline expanded
696 by other functions which must also be written down at the end
697 of compilation. We could set flag_no_inline to nonzero when
698 the time comes to write down such functions. */
701 save_for_inline_nocopy (fndecl)
706 rtx first_nonparm_insn;
708 /* Set up PARMDECL_MAP which maps pseudo-reg number to its PARM_DECL.
709 Later we set TREE_READONLY to 0 if the parm is modified inside the fn.
710 Also set up ARG_VECTOR, which holds the unmodified DECL_RTX values
711 for the parms, prior to elimination of virtual registers.
712 These values are needed for substituting parms properly. */
714 max_parm_reg = max_parm_reg_num ();
715 parmdecl_map = (tree *) alloca (max_parm_reg * sizeof (tree));
717 /* Make and emit a return-label if we have not already done so. */
719 if (return_label == 0)
721 return_label = gen_label_rtx ();
722 emit_label (return_label);
725 head = initialize_for_inline (fndecl, get_first_label_num (),
726 max_label_num (), max_reg_num (), 0);
728 /* If there are insns that copy parms from the stack into pseudo registers,
729 those insns are not copied. `expand_inline_function' must
730 emit the correct code to handle such things. */
733 if (GET_CODE (insn) != NOTE)
736 /* Get the insn which signals the end of parameter setup code. */
737 first_nonparm_insn = get_first_nonparm_insn ();
739 /* Now just scan the chain of insns to see what happens to our
740 PARM_DECLs. If a PARM_DECL is used but never modified, we
741 can substitute its rtl directly when expanding inline (and
742 perform constant folding when its incoming value is constant).
743 Otherwise, we have to copy its value into a new register and track
744 the new register's life. */
746 for (insn = NEXT_INSN (insn); insn; insn = NEXT_INSN (insn))
748 if (insn == first_nonparm_insn)
749 in_nonparm_insns = 1;
751 if (GET_RTX_CLASS (GET_CODE (insn)) == 'i')
753 if (current_function_uses_const_pool)
755 /* Replace any constant pool references with the actual constant.
756 We will put the constant back if we need to write the
757 function out after all. */
758 save_constants (&PATTERN (insn));
759 if (REG_NOTES (insn))
760 save_constants (®_NOTES (insn));
763 /* Record what interesting things happen to our parameters. */
764 note_stores (PATTERN (insn), note_modified_parmregs);
768 /* We have now allocated all that needs to be allocated permanently
769 on the rtx obstack. Set our high-water mark, so that we
770 can free the rest of this when the time comes. */
774 finish_inline (fndecl, head);
777 /* Given PX, a pointer into an insn, search for references to the constant
778 pool. Replace each with a CONST that has the mode of the original
779 constant, contains the constant, and has RTX_INTEGRATED_P set.
780 Similarly, constant pool addresses not enclosed in a MEM are replaced
781 with an ADDRESS rtx which also gives the constant, mode, and has
782 RTX_INTEGRATED_P set. */
794 /* If this is a CONST_DOUBLE, don't try to fix things up in
795 CONST_DOUBLE_MEM, because this is an infinite recursion. */
796 if (GET_CODE (x) == CONST_DOUBLE)
798 else if (GET_CODE (x) == MEM && GET_CODE (XEXP (x, 0)) == SYMBOL_REF
799 && CONSTANT_POOL_ADDRESS_P (XEXP (x,0)))
801 enum machine_mode const_mode = get_pool_mode (XEXP (x, 0));
802 rtx new = gen_rtx (CONST, const_mode, get_pool_constant (XEXP (x, 0)));
803 RTX_INTEGRATED_P (new) = 1;
805 /* If the MEM was in a different mode than the constant (perhaps we
806 were only looking at the low-order part), surround it with a
807 SUBREG so we can save both modes. */
809 if (GET_MODE (x) != const_mode)
811 new = gen_rtx (SUBREG, GET_MODE (x), new, 0);
812 RTX_INTEGRATED_P (new) = 1;
816 save_constants (&XEXP (*px, 0));
818 else if (GET_CODE (x) == SYMBOL_REF
819 && CONSTANT_POOL_ADDRESS_P (x))
821 *px = gen_rtx (ADDRESS, get_pool_mode (x), get_pool_constant (x));
822 save_constants (&XEXP (*px, 0));
823 RTX_INTEGRATED_P (*px) = 1;
828 char *fmt = GET_RTX_FORMAT (GET_CODE (x));
829 int len = GET_RTX_LENGTH (GET_CODE (x));
831 for (i = len-1; i >= 0; i--)
836 for (j = 0; j < XVECLEN (x, i); j++)
837 save_constants (&XVECEXP (x, i, j));
841 if (XEXP (x, i) == 0)
845 /* Hack tail-recursion here. */
849 save_constants (&XEXP (x, i));
856 /* Note whether a parameter is modified or not. */
859 note_modified_parmregs (reg, x)
863 if (GET_CODE (reg) == REG && in_nonparm_insns
864 && REGNO (reg) < max_parm_reg
865 && REGNO (reg) >= FIRST_PSEUDO_REGISTER
866 && parmdecl_map[REGNO (reg)] != 0)
867 TREE_READONLY (parmdecl_map[REGNO (reg)]) = 0;
870 /* Copy the rtx ORIG recursively, replacing pseudo-regs and labels
871 according to `reg_map' and `label_map'. The original rtl insns
872 will be saved for inlining; this is used to make a copy
873 which is used to finish compiling the inline function itself.
875 If we find a "saved" constant pool entry, one which was replaced with
876 the value of the constant, convert it back to a constant pool entry.
877 Since the pool wasn't touched, this should simply restore the old
880 All other kinds of rtx are copied except those that can never be
881 changed during compilation. */
884 copy_for_inline (orig)
887 register rtx x = orig;
889 register enum rtx_code code;
890 register char *format_ptr;
897 /* These types may be freely shared. */
909 /* We have to make a new CONST_DOUBLE to ensure that we account for
910 it correctly. Using the old CONST_DOUBLE_MEM data is wrong. */
911 if (GET_MODE_CLASS (GET_MODE (x)) == MODE_FLOAT)
915 REAL_VALUE_FROM_CONST_DOUBLE (d, x);
916 return CONST_DOUBLE_FROM_REAL_VALUE (d, GET_MODE (x));
919 return immed_double_const (CONST_DOUBLE_LOW (x), CONST_DOUBLE_HIGH (x),
923 /* Get constant pool entry for constant in the pool. */
924 if (RTX_INTEGRATED_P (x))
925 return validize_mem (force_const_mem (GET_MODE (x),
926 copy_for_inline (XEXP (x, 0))));
930 /* Get constant pool entry, but access in different mode. */
931 if (RTX_INTEGRATED_P (x))
934 = force_const_mem (GET_MODE (SUBREG_REG (x)),
935 copy_for_inline (XEXP (SUBREG_REG (x), 0)));
937 PUT_MODE (new, GET_MODE (x));
938 return validize_mem (new);
943 /* If not special for constant pool error. Else get constant pool
945 if (! RTX_INTEGRATED_P (x))
948 return XEXP (force_const_mem (GET_MODE (x),
949 copy_for_inline (XEXP (x, 0))), 0);
952 /* If a single asm insn contains multiple output operands
953 then it contains multiple ASM_OPERANDS rtx's that share operand 3.
954 We must make sure that the copied insn continues to share it. */
955 if (orig_asm_operands_vector == XVEC (orig, 3))
957 x = rtx_alloc (ASM_OPERANDS);
958 x->volatil = orig->volatil;
959 XSTR (x, 0) = XSTR (orig, 0);
960 XSTR (x, 1) = XSTR (orig, 1);
961 XINT (x, 2) = XINT (orig, 2);
962 XVEC (x, 3) = copy_asm_operands_vector;
963 XVEC (x, 4) = copy_asm_constraints_vector;
964 XSTR (x, 5) = XSTR (orig, 5);
965 XINT (x, 6) = XINT (orig, 6);
971 /* A MEM is usually allowed to be shared if its address is constant
972 or is a constant plus one of the special registers.
974 We do not allow sharing of addresses that are either a special
975 register or the sum of a constant and a special register because
976 it is possible for unshare_all_rtl to copy the address, into memory
977 that won't be saved. Although the MEM can safely be shared, and
978 won't be copied there, the address itself cannot be shared, and may
981 There are also two exceptions with constants: The first is if the
982 constant is a LABEL_REF or the sum of the LABEL_REF
983 and an integer. This case can happen if we have an inline
984 function that supplies a constant operand to the call of another
985 inline function that uses it in a switch statement. In this case,
986 we will be replacing the LABEL_REF, so we have to replace this MEM
989 The second case is if we have a (const (plus (address ..) ...)).
990 In that case we need to put back the address of the constant pool
993 if (CONSTANT_ADDRESS_P (XEXP (x, 0))
994 && GET_CODE (XEXP (x, 0)) != LABEL_REF
995 && ! (GET_CODE (XEXP (x, 0)) == CONST
996 && (GET_CODE (XEXP (XEXP (x, 0), 0)) == PLUS
997 && ((GET_CODE (XEXP (XEXP (XEXP (x, 0), 0), 0))
999 || (GET_CODE (XEXP (XEXP (XEXP (x, 0), 0), 0))
1005 /* If this is a non-local label, just make a new LABEL_REF.
1006 Otherwise, use the new label as well. */
1007 x = gen_rtx (LABEL_REF, GET_MODE (orig),
1008 LABEL_REF_NONLOCAL_P (orig) ? XEXP (orig, 0)
1009 : label_map[CODE_LABEL_NUMBER (XEXP (orig, 0))]);
1010 LABEL_REF_NONLOCAL_P (x) = LABEL_REF_NONLOCAL_P (orig);
1011 LABEL_OUTSIDE_LOOP_P (x) = LABEL_OUTSIDE_LOOP_P (orig);
1015 if (REGNO (x) > LAST_VIRTUAL_REGISTER)
1016 return reg_map [REGNO (x)];
1021 /* If a parm that gets modified lives in a pseudo-reg,
1022 clear its TREE_READONLY to prevent certain optimizations. */
1024 rtx dest = SET_DEST (x);
1026 while (GET_CODE (dest) == STRICT_LOW_PART
1027 || GET_CODE (dest) == ZERO_EXTRACT
1028 || GET_CODE (dest) == SUBREG)
1029 dest = XEXP (dest, 0);
1031 if (GET_CODE (dest) == REG
1032 && REGNO (dest) < max_parm_reg
1033 && REGNO (dest) >= FIRST_PSEUDO_REGISTER
1034 && parmdecl_map[REGNO (dest)] != 0
1035 /* The insn to load an arg pseudo from a stack slot
1036 does not count as modifying it. */
1037 && in_nonparm_insns)
1038 TREE_READONLY (parmdecl_map[REGNO (dest)]) = 0;
1042 #if 0 /* This is a good idea, but here is the wrong place for it. */
1043 /* Arrange that CONST_INTs always appear as the second operand
1044 if they appear, and that `frame_pointer_rtx' or `arg_pointer_rtx'
1045 always appear as the first. */
1047 if (GET_CODE (XEXP (x, 0)) == CONST_INT
1048 || (XEXP (x, 1) == frame_pointer_rtx
1049 || (ARG_POINTER_REGNUM != FRAME_POINTER_REGNUM
1050 && XEXP (x, 1) == arg_pointer_rtx)))
1052 rtx t = XEXP (x, 0);
1053 XEXP (x, 0) = XEXP (x, 1);
1060 /* Replace this rtx with a copy of itself. */
1062 x = rtx_alloc (code);
1063 bcopy ((char *) orig, (char *) x,
1064 (sizeof (*x) - sizeof (x->fld)
1065 + sizeof (x->fld[0]) * GET_RTX_LENGTH (code)));
1067 /* Now scan the subexpressions recursively.
1068 We can store any replaced subexpressions directly into X
1069 since we know X is not shared! Any vectors in X
1070 must be copied if X was copied. */
1072 format_ptr = GET_RTX_FORMAT (code);
1074 for (i = 0; i < GET_RTX_LENGTH (code); i++)
1076 switch (*format_ptr++)
1079 XEXP (x, i) = copy_for_inline (XEXP (x, i));
1083 /* Change any references to old-insns to point to the
1084 corresponding copied insns. */
1085 XEXP (x, i) = insn_map[INSN_UID (XEXP (x, i))];
1089 if (XVEC (x, i) != NULL && XVECLEN (x, i) != 0)
1093 XVEC (x, i) = gen_rtvec_v (XVECLEN (x, i), &XVECEXP (x, i, 0));
1094 for (j = 0; j < XVECLEN (x, i); j++)
1096 = copy_for_inline (XVECEXP (x, i, j));
1102 if (code == ASM_OPERANDS && orig_asm_operands_vector == 0)
1104 orig_asm_operands_vector = XVEC (orig, 3);
1105 copy_asm_operands_vector = XVEC (x, 3);
1106 copy_asm_constraints_vector = XVEC (x, 4);
1112 /* Unfortunately, we need a global copy of const_equiv map for communication
1113 with a function called from note_stores. Be *very* careful that this
1114 is used properly in the presence of recursion. */
1116 rtx *global_const_equiv_map;
1117 int global_const_equiv_map_size;
1119 #define FIXED_BASE_PLUS_P(X) \
1120 (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 1)) == CONST_INT \
1121 && GET_CODE (XEXP (X, 0)) == REG \
1122 && REGNO (XEXP (X, 0)) >= FIRST_VIRTUAL_REGISTER \
1123 && REGNO (XEXP (X, 0)) <= LAST_VIRTUAL_REGISTER)
1125 /* Integrate the procedure defined by FNDECL. Note that this function
1126 may wind up calling itself. Since the static variables are not
1127 reentrant, we do not assign them until after the possibility
1128 of recursion is eliminated.
1130 If IGNORE is nonzero, do not produce a value.
1131 Otherwise store the value in TARGET if it is nonzero and that is convenient.
1134 (rtx)-1 if we could not substitute the function
1135 0 if we substituted it and it does not produce a value
1136 else an rtx for where the value is stored. */
1139 expand_inline_function (fndecl, parms, target, ignore, type, structure_value_addr)
1144 rtx structure_value_addr;
1146 tree formal, actual, block;
1147 rtx header = DECL_SAVED_INSNS (fndecl);
1148 rtx insns = FIRST_FUNCTION_INSN (header);
1149 rtx parm_insns = FIRST_PARM_INSN (header);
1155 int min_labelno = FIRST_LABELNO (header);
1156 int max_labelno = LAST_LABELNO (header);
1158 rtx local_return_label = 0;
1161 struct inline_remap *map;
1163 rtvec arg_vector = ORIGINAL_ARG_VECTOR (header);
1164 rtx static_chain_value = 0;
1166 /* Allow for equivalences of the pseudos we make for virtual fp and ap. */
1167 max_regno = MAX_REGNUM (header) + 3;
1168 if (max_regno < FIRST_PSEUDO_REGISTER)
1171 nargs = list_length (DECL_ARGUMENTS (fndecl));
1173 /* Check that the parms type match and that sufficient arguments were
1174 passed. Since the appropriate conversions or default promotions have
1175 already been applied, the machine modes should match exactly. */
1177 for (formal = DECL_ARGUMENTS (fndecl),
1180 formal = TREE_CHAIN (formal),
1181 actual = TREE_CHAIN (actual))
1184 enum machine_mode mode;
1187 return (rtx) (HOST_WIDE_INT) -1;
1189 arg = TREE_VALUE (actual);
1190 mode= TYPE_MODE (DECL_ARG_TYPE (formal));
1192 if (mode != TYPE_MODE (TREE_TYPE (arg))
1193 /* If they are block mode, the types should match exactly.
1194 They don't match exactly if TREE_TYPE (FORMAL) == ERROR_MARK_NODE,
1195 which could happen if the parameter has incomplete type. */
1196 || (mode == BLKmode && TREE_TYPE (arg) != TREE_TYPE (formal)))
1197 return (rtx) (HOST_WIDE_INT) -1;
1200 /* Extra arguments are valid, but will be ignored below, so we must
1201 evaluate them here for side-effects. */
1202 for (; actual; actual = TREE_CHAIN (actual))
1203 expand_expr (TREE_VALUE (actual), const0_rtx,
1204 TYPE_MODE (TREE_TYPE (TREE_VALUE (actual))), 0);
1206 /* Make a binding contour to keep inline cleanups called at
1207 outer function-scope level from looking like they are shadowing
1208 parameter declarations. */
1211 /* Make a fresh binding contour that we can easily remove. */
1213 expand_start_bindings (0);
1214 if (GET_CODE (parm_insns) == NOTE
1215 && NOTE_LINE_NUMBER (parm_insns) > 0)
1217 rtx note = emit_note (NOTE_SOURCE_FILE (parm_insns),
1218 NOTE_LINE_NUMBER (parm_insns));
1220 RTX_INTEGRATED_P (note) = 1;
1223 /* Expand the function arguments. Do this first so that any
1224 new registers get created before we allocate the maps. */
1226 arg_vals = (rtx *) alloca (nargs * sizeof (rtx));
1227 arg_trees = (tree *) alloca (nargs * sizeof (tree));
1229 for (formal = DECL_ARGUMENTS (fndecl), actual = parms, i = 0;
1231 formal = TREE_CHAIN (formal), actual = TREE_CHAIN (actual), i++)
1233 /* Actual parameter, converted to the type of the argument within the
1235 tree arg = convert (TREE_TYPE (formal), TREE_VALUE (actual));
1236 /* Mode of the variable used within the function. */
1237 enum machine_mode mode = TYPE_MODE (TREE_TYPE (formal));
1239 /* Make sure this formal has some correspondence in the users code
1240 * before emitting any line notes for it. */
1241 if (DECL_SOURCE_LINE (formal))
1243 rtx note = emit_note (DECL_SOURCE_FILE (formal),
1244 DECL_SOURCE_LINE (formal));
1246 RTX_INTEGRATED_P (note) = 1;
1250 loc = RTVEC_ELT (arg_vector, i);
1252 /* If this is an object passed by invisible reference, we copy the
1253 object into a stack slot and save its address. If this will go
1254 into memory, we do nothing now. Otherwise, we just expand the
1256 if (GET_CODE (loc) == MEM && GET_CODE (XEXP (loc, 0)) == REG
1257 && REGNO (XEXP (loc, 0)) > LAST_VIRTUAL_REGISTER)
1260 = assign_stack_temp (TYPE_MODE (TREE_TYPE (arg)),
1261 int_size_in_bytes (TREE_TYPE (arg)), 1);
1263 store_expr (arg, stack_slot, 0);
1265 arg_vals[i] = XEXP (stack_slot, 0);
1267 else if (GET_CODE (loc) != MEM)
1269 if (GET_MODE (loc) != TYPE_MODE (TREE_TYPE (arg)))
1270 /* The mode if LOC and ARG can differ if LOC was a variable
1271 that had its mode promoted via PROMOTED_MODE. */
1272 arg_vals[i] = convert_modes (GET_MODE (loc),
1273 TYPE_MODE (TREE_TYPE (arg)),
1274 expand_expr (arg, NULL_RTX, mode,
1276 TREE_UNSIGNED (TREE_TYPE (formal)));
1278 arg_vals[i] = expand_expr (arg, NULL_RTX, mode, EXPAND_SUM);
1283 if (arg_vals[i] != 0
1284 && (! TREE_READONLY (formal)
1285 /* If the parameter is not read-only, copy our argument through
1286 a register. Also, we cannot use ARG_VALS[I] if it overlaps
1287 TARGET in any way. In the inline function, they will likely
1288 be two different pseudos, and `safe_from_p' will make all
1289 sorts of smart assumptions about their not conflicting.
1290 But if ARG_VALS[I] overlaps TARGET, these assumptions are
1291 wrong, so put ARG_VALS[I] into a fresh register. */
1293 && (GET_CODE (arg_vals[i]) == REG
1294 || GET_CODE (arg_vals[i]) == SUBREG
1295 || GET_CODE (arg_vals[i]) == MEM)
1296 && reg_overlap_mentioned_p (arg_vals[i], target))
1297 /* ??? We must always copy a SUBREG into a REG, because it might
1298 get substituted into an address, and not all ports correctly
1299 handle SUBREGs in addresses. */
1300 || (GET_CODE (arg_vals[i]) == SUBREG)))
1301 arg_vals[i] = copy_to_mode_reg (GET_MODE (loc), arg_vals[i]);
1304 /* Allocate the structures we use to remap things. */
1306 map = (struct inline_remap *) alloca (sizeof (struct inline_remap));
1307 map->fndecl = fndecl;
1309 map->reg_map = (rtx *) alloca (max_regno * sizeof (rtx));
1310 bzero ((char *) map->reg_map, max_regno * sizeof (rtx));
1312 map->label_map = (rtx *)alloca ((max_labelno - min_labelno) * sizeof (rtx));
1313 map->label_map -= min_labelno;
1315 map->insn_map = (rtx *) alloca (INSN_UID (header) * sizeof (rtx));
1316 bzero ((char *) map->insn_map, INSN_UID (header) * sizeof (rtx));
1317 map->min_insnno = 0;
1318 map->max_insnno = INSN_UID (header);
1320 map->integrating = 1;
1322 /* const_equiv_map maps pseudos in our routine to constants, so it needs to
1323 be large enough for all our pseudos. This is the number we are currently
1324 using plus the number in the called routine, plus 15 for each arg,
1325 five to compute the virtual frame pointer, and five for the return value.
1326 This should be enough for most cases. We do not reference entries
1327 outside the range of the map.
1329 ??? These numbers are quite arbitrary and were obtained by
1330 experimentation. At some point, we should try to allocate the
1331 table after all the parameters are set up so we an more accurately
1332 estimate the number of pseudos we will need. */
1334 map->const_equiv_map_size
1335 = max_reg_num () + (max_regno - FIRST_PSEUDO_REGISTER) + 15 * nargs + 10;
1337 map->const_equiv_map
1338 = (rtx *)alloca (map->const_equiv_map_size * sizeof (rtx));
1339 bzero ((char *) map->const_equiv_map,
1340 map->const_equiv_map_size * sizeof (rtx));
1343 = (unsigned *)alloca (map->const_equiv_map_size * sizeof (unsigned));
1344 bzero ((char *) map->const_age_map,
1345 map->const_equiv_map_size * sizeof (unsigned));
1348 /* Record the current insn in case we have to set up pointers to frame
1349 and argument memory blocks. */
1350 map->insns_at_start = get_last_insn ();
1352 /* Update the outgoing argument size to allow for those in the inlined
1354 if (OUTGOING_ARGS_SIZE (header) > current_function_outgoing_args_size)
1355 current_function_outgoing_args_size = OUTGOING_ARGS_SIZE (header);
1357 /* If the inline function needs to make PIC references, that means
1358 that this function's PIC offset table must be used. */
1359 if (FUNCTION_FLAGS (header) & FUNCTION_FLAGS_USES_PIC_OFFSET_TABLE)
1360 current_function_uses_pic_offset_table = 1;
1362 /* If this function needs a context, set it up. */
1363 if (FUNCTION_FLAGS (header) & FUNCTION_FLAGS_NEEDS_CONTEXT)
1364 static_chain_value = lookup_static_chain (fndecl);
1366 /* Process each argument. For each, set up things so that the function's
1367 reference to the argument will refer to the argument being passed.
1368 We only replace REG with REG here. Any simplifications are done
1369 via const_equiv_map.
1371 We make two passes: In the first, we deal with parameters that will
1372 be placed into registers, since we need to ensure that the allocated
1373 register number fits in const_equiv_map. Then we store all non-register
1374 parameters into their memory location. */
1376 /* Don't try to free temp stack slots here, because we may put one of the
1377 parameters into a temp stack slot. */
1379 for (i = 0; i < nargs; i++)
1381 rtx copy = arg_vals[i];
1383 loc = RTVEC_ELT (arg_vector, i);
1385 /* There are three cases, each handled separately. */
1386 if (GET_CODE (loc) == MEM && GET_CODE (XEXP (loc, 0)) == REG
1387 && REGNO (XEXP (loc, 0)) > LAST_VIRTUAL_REGISTER)
1389 /* This must be an object passed by invisible reference (it could
1390 also be a variable-sized object, but we forbid inlining functions
1391 with variable-sized arguments). COPY is the address of the
1392 actual value (this computation will cause it to be copied). We
1393 map that address for the register, noting the actual address as
1394 an equivalent in case it can be substituted into the insns. */
1396 if (GET_CODE (copy) != REG)
1398 temp = copy_addr_to_reg (copy);
1399 if ((CONSTANT_P (copy) || FIXED_BASE_PLUS_P (copy))
1400 && REGNO (temp) < map->const_equiv_map_size)
1402 map->const_equiv_map[REGNO (temp)] = copy;
1403 map->const_age_map[REGNO (temp)] = CONST_AGE_PARM;
1407 map->reg_map[REGNO (XEXP (loc, 0))] = copy;
1409 else if (GET_CODE (loc) == MEM)
1411 /* This is the case of a parameter that lives in memory.
1412 It will live in the block we allocate in the called routine's
1413 frame that simulates the incoming argument area. Do nothing
1414 now; we will call store_expr later. */
1417 else if (GET_CODE (loc) == REG)
1419 /* This is the good case where the parameter is in a register.
1420 If it is read-only and our argument is a constant, set up the
1421 constant equivalence.
1423 If LOC is REG_USERVAR_P, the usual case, COPY must also have
1424 that flag set if it is a register.
1426 Also, don't allow hard registers here; they might not be valid
1427 when substituted into insns. */
1429 if ((GET_CODE (copy) != REG && GET_CODE (copy) != SUBREG)
1430 || (GET_CODE (copy) == REG && REG_USERVAR_P (loc)
1431 && ! REG_USERVAR_P (copy))
1432 || (GET_CODE (copy) == REG
1433 && REGNO (copy) < FIRST_PSEUDO_REGISTER))
1435 temp = copy_to_mode_reg (GET_MODE (loc), copy);
1436 REG_USERVAR_P (temp) = REG_USERVAR_P (loc);
1437 if ((CONSTANT_P (copy) || FIXED_BASE_PLUS_P (copy))
1438 && REGNO (temp) < map->const_equiv_map_size)
1440 map->const_equiv_map[REGNO (temp)] = copy;
1441 map->const_age_map[REGNO (temp)] = CONST_AGE_PARM;
1445 map->reg_map[REGNO (loc)] = copy;
1447 else if (GET_CODE (loc) == CONCAT)
1449 /* This is the good case where the parameter is in a
1450 pair of separate pseudos.
1451 If it is read-only and our argument is a constant, set up the
1452 constant equivalence.
1454 If LOC is REG_USERVAR_P, the usual case, COPY must also have
1455 that flag set if it is a register.
1457 Also, don't allow hard registers here; they might not be valid
1458 when substituted into insns. */
1459 rtx locreal = gen_realpart (GET_MODE (XEXP (loc, 0)), loc);
1460 rtx locimag = gen_imagpart (GET_MODE (XEXP (loc, 0)), loc);
1461 rtx copyreal = gen_realpart (GET_MODE (locreal), copy);
1462 rtx copyimag = gen_imagpart (GET_MODE (locimag), copy);
1464 if ((GET_CODE (copyreal) != REG && GET_CODE (copyreal) != SUBREG)
1465 || (GET_CODE (copyreal) == REG && REG_USERVAR_P (locreal)
1466 && ! REG_USERVAR_P (copyreal))
1467 || (GET_CODE (copyreal) == REG
1468 && REGNO (copyreal) < FIRST_PSEUDO_REGISTER))
1470 temp = copy_to_mode_reg (GET_MODE (locreal), copyreal);
1471 REG_USERVAR_P (temp) = REG_USERVAR_P (locreal);
1472 if ((CONSTANT_P (copyreal) || FIXED_BASE_PLUS_P (copyreal))
1473 && REGNO (temp) < map->const_equiv_map_size)
1475 map->const_equiv_map[REGNO (temp)] = copyreal;
1476 map->const_age_map[REGNO (temp)] = CONST_AGE_PARM;
1480 map->reg_map[REGNO (locreal)] = copyreal;
1482 if ((GET_CODE (copyimag) != REG && GET_CODE (copyimag) != SUBREG)
1483 || (GET_CODE (copyimag) == REG && REG_USERVAR_P (locimag)
1484 && ! REG_USERVAR_P (copyimag))
1485 || (GET_CODE (copyimag) == REG
1486 && REGNO (copyimag) < FIRST_PSEUDO_REGISTER))
1488 temp = copy_to_mode_reg (GET_MODE (locimag), copyimag);
1489 REG_USERVAR_P (temp) = REG_USERVAR_P (locimag);
1490 if ((CONSTANT_P (copyimag) || FIXED_BASE_PLUS_P (copyimag))
1491 && REGNO (temp) < map->const_equiv_map_size)
1493 map->const_equiv_map[REGNO (temp)] = copyimag;
1494 map->const_age_map[REGNO (temp)] = CONST_AGE_PARM;
1498 map->reg_map[REGNO (locimag)] = copyimag;
1504 /* Now do the parameters that will be placed in memory. */
1506 for (formal = DECL_ARGUMENTS (fndecl), i = 0;
1507 formal; formal = TREE_CHAIN (formal), i++)
1509 loc = RTVEC_ELT (arg_vector, i);
1511 if (GET_CODE (loc) == MEM
1512 /* Exclude case handled above. */
1513 && ! (GET_CODE (XEXP (loc, 0)) == REG
1514 && REGNO (XEXP (loc, 0)) > LAST_VIRTUAL_REGISTER))
1516 rtx note = emit_note (DECL_SOURCE_FILE (formal),
1517 DECL_SOURCE_LINE (formal));
1519 RTX_INTEGRATED_P (note) = 1;
1521 /* Compute the address in the area we reserved and store the
1523 temp = copy_rtx_and_substitute (loc, map);
1524 subst_constants (&temp, NULL_RTX, map);
1525 apply_change_group ();
1526 if (! memory_address_p (GET_MODE (temp), XEXP (temp, 0)))
1527 temp = change_address (temp, VOIDmode, XEXP (temp, 0));
1528 store_expr (arg_trees[i], temp, 0);
1532 /* Deal with the places that the function puts its result.
1533 We are driven by what is placed into DECL_RESULT.
1535 Initially, we assume that we don't have anything special handling for
1536 REG_FUNCTION_RETURN_VALUE_P. */
1538 map->inline_target = 0;
1539 loc = DECL_RTL (DECL_RESULT (fndecl));
1540 if (TYPE_MODE (type) == VOIDmode)
1541 /* There is no return value to worry about. */
1543 else if (GET_CODE (loc) == MEM)
1545 if (! structure_value_addr || ! aggregate_value_p (DECL_RESULT (fndecl)))
1548 /* Pass the function the address in which to return a structure value.
1549 Note that a constructor can cause someone to call us with
1550 STRUCTURE_VALUE_ADDR, but the initialization takes place
1551 via the first parameter, rather than the struct return address.
1553 We have two cases: If the address is a simple register indirect,
1554 use the mapping mechanism to point that register to our structure
1555 return address. Otherwise, store the structure return value into
1556 the place that it will be referenced from. */
1558 if (GET_CODE (XEXP (loc, 0)) == REG)
1560 temp = force_reg (Pmode, structure_value_addr);
1561 map->reg_map[REGNO (XEXP (loc, 0))] = temp;
1562 if ((CONSTANT_P (structure_value_addr)
1563 || (GET_CODE (structure_value_addr) == PLUS
1564 && XEXP (structure_value_addr, 0) == virtual_stack_vars_rtx
1565 && GET_CODE (XEXP (structure_value_addr, 1)) == CONST_INT))
1566 && REGNO (temp) < map->const_equiv_map_size)
1568 map->const_equiv_map[REGNO (temp)] = structure_value_addr;
1569 map->const_age_map[REGNO (temp)] = CONST_AGE_PARM;
1574 temp = copy_rtx_and_substitute (loc, map);
1575 subst_constants (&temp, NULL_RTX, map);
1576 apply_change_group ();
1577 emit_move_insn (temp, structure_value_addr);
1581 /* We will ignore the result value, so don't look at its structure.
1582 Note that preparations for an aggregate return value
1583 do need to be made (above) even if it will be ignored. */
1585 else if (GET_CODE (loc) == REG)
1587 /* The function returns an object in a register and we use the return
1588 value. Set up our target for remapping. */
1590 /* Machine mode function was declared to return. */
1591 enum machine_mode departing_mode = TYPE_MODE (type);
1592 /* (Possibly wider) machine mode it actually computes
1593 (for the sake of callers that fail to declare it right). */
1594 enum machine_mode arriving_mode
1595 = TYPE_MODE (TREE_TYPE (DECL_RESULT (fndecl)));
1598 /* Don't use MEMs as direct targets because on some machines
1599 substituting a MEM for a REG makes invalid insns.
1600 Let the combiner substitute the MEM if that is valid. */
1601 if (target == 0 || GET_CODE (target) != REG
1602 || GET_MODE (target) != departing_mode)
1603 target = gen_reg_rtx (departing_mode);
1605 /* If function's value was promoted before return,
1606 avoid machine mode mismatch when we substitute INLINE_TARGET.
1607 But TARGET is what we will return to the caller. */
1608 if (arriving_mode != departing_mode)
1609 reg_to_map = gen_rtx (SUBREG, arriving_mode, target, 0);
1611 reg_to_map = target;
1613 /* Usually, the result value is the machine's return register.
1614 Sometimes it may be a pseudo. Handle both cases. */
1615 if (REG_FUNCTION_VALUE_P (loc))
1616 map->inline_target = reg_to_map;
1618 map->reg_map[REGNO (loc)] = reg_to_map;
1621 /* Make new label equivalences for the labels in the called function. */
1622 for (i = min_labelno; i < max_labelno; i++)
1623 map->label_map[i] = gen_label_rtx ();
1625 /* Perform postincrements before actually calling the function. */
1628 /* Clean up stack so that variables might have smaller offsets. */
1629 do_pending_stack_adjust ();
1631 /* Save a copy of the location of const_equiv_map for mark_stores, called
1633 global_const_equiv_map = map->const_equiv_map;
1634 global_const_equiv_map_size = map->const_equiv_map_size;
1636 /* Now copy the insns one by one. Do this in two passes, first the insns and
1637 then their REG_NOTES, just like save_for_inline. */
1639 /* This loop is very similar to the loop in copy_loop_body in unroll.c. */
1641 for (insn = insns; insn; insn = NEXT_INSN (insn))
1645 map->orig_asm_operands_vector = 0;
1647 switch (GET_CODE (insn))
1650 pattern = PATTERN (insn);
1652 if (GET_CODE (pattern) == USE
1653 && GET_CODE (XEXP (pattern, 0)) == REG
1654 && REG_FUNCTION_VALUE_P (XEXP (pattern, 0)))
1655 /* The (USE (REG n)) at return from the function should
1656 be ignored since we are changing (REG n) into
1660 /* Ignore setting a function value that we don't want to use. */
1661 if (map->inline_target == 0
1662 && GET_CODE (pattern) == SET
1663 && GET_CODE (SET_DEST (pattern)) == REG
1664 && REG_FUNCTION_VALUE_P (SET_DEST (pattern)))
1666 if (volatile_refs_p (SET_SRC (pattern)))
1668 /* If we must not delete the source,
1669 load it into a new temporary. */
1670 copy = emit_insn (copy_rtx_and_substitute (pattern, map));
1671 SET_DEST (PATTERN (copy))
1672 = gen_reg_rtx (GET_MODE (SET_DEST (PATTERN (copy))));
1677 /* If this is setting the static chain pseudo, set it from
1678 the value we want to give it instead. */
1679 else if (static_chain_value != 0
1680 && GET_CODE (pattern) == SET
1681 && rtx_equal_p (SET_SRC (pattern),
1682 static_chain_incoming_rtx))
1684 rtx newdest = copy_rtx_and_substitute (SET_DEST (pattern), map);
1686 copy = emit_insn (gen_rtx (SET, VOIDmode, newdest,
1687 static_chain_value));
1689 static_chain_value = 0;
1692 copy = emit_insn (copy_rtx_and_substitute (pattern, map));
1693 /* REG_NOTES will be copied later. */
1696 /* If this insn is setting CC0, it may need to look at
1697 the insn that uses CC0 to see what type of insn it is.
1698 In that case, the call to recog via validate_change will
1699 fail. So don't substitute constants here. Instead,
1700 do it when we emit the following insn.
1702 For example, see the pyr.md file. That machine has signed and
1703 unsigned compares. The compare patterns must check the
1704 following branch insn to see which what kind of compare to
1707 If the previous insn set CC0, substitute constants on it as
1709 if (sets_cc0_p (PATTERN (copy)) != 0)
1714 try_constants (cc0_insn, map);
1716 try_constants (copy, map);
1719 try_constants (copy, map);
1724 if (GET_CODE (PATTERN (insn)) == RETURN)
1726 if (local_return_label == 0)
1727 local_return_label = gen_label_rtx ();
1728 pattern = gen_jump (local_return_label);
1731 pattern = copy_rtx_and_substitute (PATTERN (insn), map);
1733 copy = emit_jump_insn (pattern);
1737 try_constants (cc0_insn, map);
1740 try_constants (copy, map);
1742 /* If this used to be a conditional jump insn but whose branch
1743 direction is now know, we must do something special. */
1744 if (condjump_p (insn) && ! simplejump_p (insn) && map->last_pc_value)
1747 /* The previous insn set cc0 for us. So delete it. */
1748 delete_insn (PREV_INSN (copy));
1751 /* If this is now a no-op, delete it. */
1752 if (map->last_pc_value == pc_rtx)
1758 /* Otherwise, this is unconditional jump so we must put a
1759 BARRIER after it. We could do some dead code elimination
1760 here, but jump.c will do it just as well. */
1766 pattern = copy_rtx_and_substitute (PATTERN (insn), map);
1767 copy = emit_call_insn (pattern);
1769 /* Because the USAGE information potentially contains objects other
1770 than hard registers, we need to copy it. */
1771 CALL_INSN_FUNCTION_USAGE (copy) =
1772 copy_rtx_and_substitute (CALL_INSN_FUNCTION_USAGE (insn), map);
1776 try_constants (cc0_insn, map);
1779 try_constants (copy, map);
1781 /* Be lazy and assume CALL_INSNs clobber all hard registers. */
1782 for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
1783 map->const_equiv_map[i] = 0;
1787 copy = emit_label (map->label_map[CODE_LABEL_NUMBER (insn)]);
1788 LABEL_NAME (copy) = LABEL_NAME (insn);
1793 copy = emit_barrier ();
1797 /* It is important to discard function-end and function-beg notes,
1798 so we have only one of each in the current function.
1799 Also, NOTE_INSN_DELETED notes aren't useful (save_for_inline
1800 deleted these in the copy used for continuing compilation,
1801 not the copy used for inlining). */
1802 if (NOTE_LINE_NUMBER (insn) != NOTE_INSN_FUNCTION_END
1803 && NOTE_LINE_NUMBER (insn) != NOTE_INSN_FUNCTION_BEG
1804 && NOTE_LINE_NUMBER (insn) != NOTE_INSN_DELETED)
1805 copy = emit_note (NOTE_SOURCE_FILE (insn), NOTE_LINE_NUMBER (insn));
1816 RTX_INTEGRATED_P (copy) = 1;
1818 map->insn_map[INSN_UID (insn)] = copy;
1821 /* Now copy the REG_NOTES. Increment const_age, so that only constants
1822 from parameters can be substituted in. These are the only ones that
1823 are valid across the entire function. */
1825 for (insn = insns; insn; insn = NEXT_INSN (insn))
1826 if (GET_RTX_CLASS (GET_CODE (insn)) == 'i'
1827 && map->insn_map[INSN_UID (insn)]
1828 && REG_NOTES (insn))
1830 rtx tem = copy_rtx_and_substitute (REG_NOTES (insn), map);
1831 /* We must also do subst_constants, in case one of our parameters
1832 has const type and constant value. */
1833 subst_constants (&tem, NULL_RTX, map);
1834 apply_change_group ();
1835 REG_NOTES (map->insn_map[INSN_UID (insn)]) = tem;
1838 if (local_return_label)
1839 emit_label (local_return_label);
1841 /* Make copies of the decls of the symbols in the inline function, so that
1842 the copies of the variables get declared in the current function. Set
1843 up things so that lookup_static_chain knows that to interpret registers
1844 in SAVE_EXPRs for TYPE_SIZEs as local. */
1846 inline_function_decl = fndecl;
1847 integrate_parm_decls (DECL_ARGUMENTS (fndecl), map, arg_vector);
1848 integrate_decl_tree ((tree) ORIGINAL_DECL_INITIAL (header), 0, map);
1849 inline_function_decl = 0;
1851 /* End the scope containing the copied formal parameter variables
1852 and copied LABEL_DECLs. */
1854 expand_end_bindings (getdecls (), 1, 1);
1855 block = poplevel (1, 1, 0);
1856 BLOCK_ABSTRACT_ORIGIN (block) = (DECL_ABSTRACT_ORIGIN (fndecl) == NULL
1857 ? fndecl : DECL_ABSTRACT_ORIGIN (fndecl));
1859 emit_line_note (input_filename, lineno);
1861 if (structure_value_addr)
1863 target = gen_rtx (MEM, TYPE_MODE (type),
1864 memory_address (TYPE_MODE (type), structure_value_addr));
1865 MEM_IN_STRUCT_P (target) = 1;
1870 /* Given a chain of PARM_DECLs, ARGS, copy each decl into a VAR_DECL,
1871 push all of those decls and give each one the corresponding home. */
1874 integrate_parm_decls (args, map, arg_vector)
1876 struct inline_remap *map;
1882 for (tail = args, i = 0; tail; tail = TREE_CHAIN (tail), i++)
1884 register tree decl = build_decl (VAR_DECL, DECL_NAME (tail),
1887 = copy_rtx_and_substitute (RTVEC_ELT (arg_vector, i), map);
1889 DECL_ARG_TYPE (decl) = DECL_ARG_TYPE (tail);
1890 /* We really should be setting DECL_INCOMING_RTL to something reasonable
1891 here, but that's going to require some more work. */
1892 /* DECL_INCOMING_RTL (decl) = ?; */
1893 /* These args would always appear unused, if not for this. */
1894 TREE_USED (decl) = 1;
1895 /* Prevent warning for shadowing with these. */
1896 DECL_ABSTRACT_ORIGIN (decl) = tail;
1898 /* Fully instantiate the address with the equivalent form so that the
1899 debugging information contains the actual register, instead of the
1900 virtual register. Do this by not passing an insn to
1902 subst_constants (&new_decl_rtl, NULL_RTX, map);
1903 apply_change_group ();
1904 DECL_RTL (decl) = new_decl_rtl;
1908 /* Given a BLOCK node LET, push decls and levels so as to construct in the
1909 current function a tree of contexts isomorphic to the one that is given.
1911 LEVEL indicates how far down into the BLOCK tree is the node we are
1912 currently traversing. It is always zero except for recursive calls.
1914 MAP, if nonzero, is a pointer to an inline_remap map which indicates how
1915 registers used in the DECL_RTL field should be remapped. If it is zero,
1916 no mapping is necessary. */
1919 integrate_decl_tree (let, level, map)
1922 struct inline_remap *map;
1929 for (t = BLOCK_VARS (let); t; t = TREE_CHAIN (t))
1933 push_obstacks_nochange ();
1934 saveable_allocation ();
1938 if (DECL_RTL (t) != 0)
1940 DECL_RTL (d) = copy_rtx_and_substitute (DECL_RTL (t), map);
1941 /* Fully instantiate the address with the equivalent form so that the
1942 debugging information contains the actual register, instead of the
1943 virtual register. Do this by not passing an insn to
1945 subst_constants (&DECL_RTL (d), NULL_RTX, map);
1946 apply_change_group ();
1948 /* These args would always appear unused, if not for this. */
1950 /* Prevent warning for shadowing with these. */
1951 DECL_ABSTRACT_ORIGIN (d) = t;
1953 if (DECL_LANG_SPECIFIC (d))
1959 for (t = BLOCK_SUBBLOCKS (let); t; t = TREE_CHAIN (t))
1960 integrate_decl_tree (t, level + 1, map);
1964 node = poplevel (1, 0, 0);
1967 TREE_USED (node) = TREE_USED (let);
1968 BLOCK_ABSTRACT_ORIGIN (node) = let;
1973 /* Create a new copy of an rtx.
1974 Recursively copies the operands of the rtx,
1975 except for those few rtx codes that are sharable.
1977 We always return an rtx that is similar to that incoming rtx, with the
1978 exception of possibly changing a REG to a SUBREG or vice versa. No
1979 rtl is ever emitted.
1981 Handle constants that need to be placed in the constant pool by
1982 calling `force_const_mem'. */
1985 copy_rtx_and_substitute (orig, map)
1987 struct inline_remap *map;
1989 register rtx copy, temp;
1991 register RTX_CODE code;
1992 register enum machine_mode mode;
1993 register char *format_ptr;
1999 code = GET_CODE (orig);
2000 mode = GET_MODE (orig);
2005 /* If the stack pointer register shows up, it must be part of
2006 stack-adjustments (*not* because we eliminated the frame pointer!).
2007 Small hard registers are returned as-is. Pseudo-registers
2008 go through their `reg_map'. */
2009 regno = REGNO (orig);
2010 if (regno <= LAST_VIRTUAL_REGISTER)
2012 /* Some hard registers are also mapped,
2013 but others are not translated. */
2014 if (map->reg_map[regno] != 0)
2015 return map->reg_map[regno];
2017 /* If this is the virtual frame pointer, make space in current
2018 function's stack frame for the stack frame of the inline function.
2020 Copy the address of this area into a pseudo. Map
2021 virtual_stack_vars_rtx to this pseudo and set up a constant
2022 equivalence for it to be the address. This will substitute the
2023 address into insns where it can be substituted and use the new
2024 pseudo where it can't. */
2025 if (regno == VIRTUAL_STACK_VARS_REGNUM)
2028 int size = DECL_FRAME_SIZE (map->fndecl);
2032 loc = assign_stack_temp (BLKmode, size, 1);
2033 loc = XEXP (loc, 0);
2034 #ifdef FRAME_GROWS_DOWNWARD
2035 /* In this case, virtual_stack_vars_rtx points to one byte
2036 higher than the top of the frame area. So compute the offset
2037 to one byte higher than our substitute frame.
2038 Keep the fake frame pointer aligned like a real one. */
2039 rounded = CEIL_ROUND (size, BIGGEST_ALIGNMENT / BITS_PER_UNIT);
2040 loc = plus_constant (loc, rounded);
2042 map->reg_map[regno] = temp
2043 = force_reg (Pmode, force_operand (loc, NULL_RTX));
2045 if (REGNO (temp) < map->const_equiv_map_size)
2047 map->const_equiv_map[REGNO (temp)] = loc;
2048 map->const_age_map[REGNO (temp)] = CONST_AGE_PARM;
2051 seq = gen_sequence ();
2053 emit_insn_after (seq, map->insns_at_start);
2056 else if (regno == VIRTUAL_INCOMING_ARGS_REGNUM)
2058 /* Do the same for a block to contain any arguments referenced
2061 int size = FUNCTION_ARGS_SIZE (DECL_SAVED_INSNS (map->fndecl));
2064 loc = assign_stack_temp (BLKmode, size, 1);
2065 loc = XEXP (loc, 0);
2066 /* When arguments grow downward, the virtual incoming
2067 args pointer points to the top of the argument block,
2068 so the remapped location better do the same. */
2069 #ifdef ARGS_GROW_DOWNWARD
2070 loc = plus_constant (loc, size);
2072 map->reg_map[regno] = temp
2073 = force_reg (Pmode, force_operand (loc, NULL_RTX));
2075 if (REGNO (temp) < map->const_equiv_map_size)
2077 map->const_equiv_map[REGNO (temp)] = loc;
2078 map->const_age_map[REGNO (temp)] = CONST_AGE_PARM;
2081 seq = gen_sequence ();
2083 emit_insn_after (seq, map->insns_at_start);
2086 else if (REG_FUNCTION_VALUE_P (orig))
2088 /* This is a reference to the function return value. If
2089 the function doesn't have a return value, error. If the
2090 mode doesn't agree, make a SUBREG. */
2091 if (map->inline_target == 0)
2092 /* Must be unrolling loops or replicating code if we
2093 reach here, so return the register unchanged. */
2095 else if (mode != GET_MODE (map->inline_target))
2096 return gen_lowpart (mode, map->inline_target);
2098 return map->inline_target;
2102 if (map->reg_map[regno] == NULL)
2104 map->reg_map[regno] = gen_reg_rtx (mode);
2105 REG_USERVAR_P (map->reg_map[regno]) = REG_USERVAR_P (orig);
2106 REG_LOOP_TEST_P (map->reg_map[regno]) = REG_LOOP_TEST_P (orig);
2107 RTX_UNCHANGING_P (map->reg_map[regno]) = RTX_UNCHANGING_P (orig);
2108 /* A reg with REG_FUNCTION_VALUE_P true will never reach here. */
2110 return map->reg_map[regno];
2113 copy = copy_rtx_and_substitute (SUBREG_REG (orig), map);
2114 /* SUBREG is ordinary, but don't make nested SUBREGs. */
2115 if (GET_CODE (copy) == SUBREG)
2116 return gen_rtx (SUBREG, GET_MODE (orig), SUBREG_REG (copy),
2117 SUBREG_WORD (orig) + SUBREG_WORD (copy));
2118 else if (GET_CODE (copy) == CONCAT)
2119 return (subreg_realpart_p (orig) ? XEXP (copy, 0) : XEXP (copy, 1));
2121 return gen_rtx (SUBREG, GET_MODE (orig), copy,
2122 SUBREG_WORD (orig));
2126 /* USE and CLOBBER are ordinary, but we convert (use (subreg foo))
2127 to (use foo) if the original insn didn't have a subreg.
2128 Removing the subreg distorts the VAX movstrhi pattern
2129 by changing the mode of an operand. */
2130 copy = copy_rtx_and_substitute (XEXP (orig, 0), map);
2131 if (GET_CODE (copy) == SUBREG && GET_CODE (XEXP (orig, 0)) != SUBREG)
2132 copy = SUBREG_REG (copy);
2133 return gen_rtx (code, VOIDmode, copy);
2136 LABEL_PRESERVE_P (map->label_map[CODE_LABEL_NUMBER (orig)])
2137 = LABEL_PRESERVE_P (orig);
2138 return map->label_map[CODE_LABEL_NUMBER (orig)];
2141 copy = gen_rtx (LABEL_REF, mode,
2142 LABEL_REF_NONLOCAL_P (orig) ? XEXP (orig, 0)
2143 : map->label_map[CODE_LABEL_NUMBER (XEXP (orig, 0))]);
2144 LABEL_OUTSIDE_LOOP_P (copy) = LABEL_OUTSIDE_LOOP_P (orig);
2146 /* The fact that this label was previously nonlocal does not mean
2147 it still is, so we must check if it is within the range of
2148 this function's labels. */
2149 LABEL_REF_NONLOCAL_P (copy)
2150 = (LABEL_REF_NONLOCAL_P (orig)
2151 && ! (CODE_LABEL_NUMBER (XEXP (copy, 0)) >= get_first_label_num ()
2152 && CODE_LABEL_NUMBER (XEXP (copy, 0)) < max_label_num ()));
2154 /* If we have made a nonlocal label local, it means that this
2155 inlined call will be refering to our nonlocal goto handler.
2156 So make sure we create one for this block; we normally would
2157 not since this is not otherwise considered a "call". */
2158 if (LABEL_REF_NONLOCAL_P (orig) && ! LABEL_REF_NONLOCAL_P (copy))
2159 function_call_count++;
2169 /* Symbols which represent the address of a label stored in the constant
2170 pool must be modified to point to a constant pool entry for the
2171 remapped label. Otherwise, symbols are returned unchanged. */
2172 if (CONSTANT_POOL_ADDRESS_P (orig))
2174 rtx constant = get_pool_constant (orig);
2175 if (GET_CODE (constant) == LABEL_REF)
2176 return XEXP (force_const_mem (Pmode,
2177 copy_rtx_and_substitute (constant,
2185 /* We have to make a new copy of this CONST_DOUBLE because don't want
2186 to use the old value of CONST_DOUBLE_MEM. Also, this may be a
2187 duplicate of a CONST_DOUBLE we have already seen. */
2188 if (GET_MODE_CLASS (GET_MODE (orig)) == MODE_FLOAT)
2192 REAL_VALUE_FROM_CONST_DOUBLE (d, orig);
2193 return CONST_DOUBLE_FROM_REAL_VALUE (d, GET_MODE (orig));
2196 return immed_double_const (CONST_DOUBLE_LOW (orig),
2197 CONST_DOUBLE_HIGH (orig), VOIDmode);
2200 /* Make new constant pool entry for a constant
2201 that was in the pool of the inline function. */
2202 if (RTX_INTEGRATED_P (orig))
2204 /* If this was an address of a constant pool entry that itself
2205 had to be placed in the constant pool, it might not be a
2206 valid address. So the recursive call below might turn it
2207 into a register. In that case, it isn't a constant any
2208 more, so return it. This has the potential of changing a
2209 MEM into a REG, but we'll assume that it safe. */
2210 temp = copy_rtx_and_substitute (XEXP (orig, 0), map);
2211 if (! CONSTANT_P (temp))
2213 return validize_mem (force_const_mem (GET_MODE (orig), temp));
2218 /* If from constant pool address, make new constant pool entry and
2219 return its address. */
2220 if (! RTX_INTEGRATED_P (orig))
2223 temp = force_const_mem (GET_MODE (orig),
2224 copy_rtx_and_substitute (XEXP (orig, 0), map));
2227 /* Legitimizing the address here is incorrect.
2229 The only ADDRESS rtx's that can reach here are ones created by
2230 save_constants. Hence the operand of the ADDRESS is always legal
2231 in this position of the instruction, since the original rtx without
2232 the ADDRESS was legal.
2234 The reason we don't legitimize the address here is that on the
2235 Sparc, the caller may have a (high ...) surrounding this ADDRESS.
2236 This code forces the operand of the address to a register, which
2237 fails because we can not take the HIGH part of a register.
2239 Also, change_address may create new registers. These registers
2240 will not have valid reg_map entries. This can cause try_constants()
2241 to fail because assumes that all registers in the rtx have valid
2242 reg_map entries, and it may end up replacing one of these new
2243 registers with junk. */
2245 if (! memory_address_p (GET_MODE (temp), XEXP (temp, 0)))
2246 temp = change_address (temp, GET_MODE (temp), XEXP (temp, 0));
2249 return XEXP (temp, 0);
2252 /* If a single asm insn contains multiple output operands
2253 then it contains multiple ASM_OPERANDS rtx's that share operand 3.
2254 We must make sure that the copied insn continues to share it. */
2255 if (map->orig_asm_operands_vector == XVEC (orig, 3))
2257 copy = rtx_alloc (ASM_OPERANDS);
2258 copy->volatil = orig->volatil;
2259 XSTR (copy, 0) = XSTR (orig, 0);
2260 XSTR (copy, 1) = XSTR (orig, 1);
2261 XINT (copy, 2) = XINT (orig, 2);
2262 XVEC (copy, 3) = map->copy_asm_operands_vector;
2263 XVEC (copy, 4) = map->copy_asm_constraints_vector;
2264 XSTR (copy, 5) = XSTR (orig, 5);
2265 XINT (copy, 6) = XINT (orig, 6);
2271 /* This is given special treatment because the first
2272 operand of a CALL is a (MEM ...) which may get
2273 forced into a register for cse. This is undesirable
2274 if function-address cse isn't wanted or if we won't do cse. */
2275 #ifndef NO_FUNCTION_CSE
2276 if (! (optimize && ! flag_no_function_cse))
2278 return gen_rtx (CALL, GET_MODE (orig),
2279 gen_rtx (MEM, GET_MODE (XEXP (orig, 0)),
2280 copy_rtx_and_substitute (XEXP (XEXP (orig, 0), 0), map)),
2281 copy_rtx_and_substitute (XEXP (orig, 1), map));
2285 /* Must be ifdefed out for loop unrolling to work. */
2291 /* If this is setting fp or ap, it means that we have a nonlocal goto.
2293 If the nonlocal goto is into the current function,
2294 this will result in unnecessarily bad code, but should work. */
2295 if (SET_DEST (orig) == virtual_stack_vars_rtx
2296 || SET_DEST (orig) == virtual_incoming_args_rtx)
2297 return gen_rtx (SET, VOIDmode, SET_DEST (orig),
2298 copy_rtx_and_substitute (SET_SRC (orig), map));
2302 copy = rtx_alloc (MEM);
2303 PUT_MODE (copy, mode);
2304 XEXP (copy, 0) = copy_rtx_and_substitute (XEXP (orig, 0), map);
2305 MEM_IN_STRUCT_P (copy) = MEM_IN_STRUCT_P (orig);
2306 MEM_VOLATILE_P (copy) = MEM_VOLATILE_P (orig);
2308 /* If doing function inlining, this MEM might not be const in the
2309 function that it is being inlined into, and thus may not be
2310 unchanging after function inlining. Constant pool references are
2311 handled elsewhere, so this doesn't lose RTX_UNCHANGING_P bits
2313 if (! map->integrating)
2314 RTX_UNCHANGING_P (copy) = RTX_UNCHANGING_P (orig);
2319 copy = rtx_alloc (code);
2320 PUT_MODE (copy, mode);
2321 copy->in_struct = orig->in_struct;
2322 copy->volatil = orig->volatil;
2323 copy->unchanging = orig->unchanging;
2325 format_ptr = GET_RTX_FORMAT (GET_CODE (copy));
2327 for (i = 0; i < GET_RTX_LENGTH (GET_CODE (copy)); i++)
2329 switch (*format_ptr++)
2335 XEXP (copy, i) = copy_rtx_and_substitute (XEXP (orig, i), map);
2339 /* Change any references to old-insns to point to the
2340 corresponding copied insns. */
2341 XEXP (copy, i) = map->insn_map[INSN_UID (XEXP (orig, i))];
2345 XVEC (copy, i) = XVEC (orig, i);
2346 if (XVEC (orig, i) != NULL && XVECLEN (orig, i) != 0)
2348 XVEC (copy, i) = rtvec_alloc (XVECLEN (orig, i));
2349 for (j = 0; j < XVECLEN (copy, i); j++)
2350 XVECEXP (copy, i, j)
2351 = copy_rtx_and_substitute (XVECEXP (orig, i, j), map);
2356 XWINT (copy, i) = XWINT (orig, i);
2360 XINT (copy, i) = XINT (orig, i);
2364 XSTR (copy, i) = XSTR (orig, i);
2372 if (code == ASM_OPERANDS && map->orig_asm_operands_vector == 0)
2374 map->orig_asm_operands_vector = XVEC (orig, 3);
2375 map->copy_asm_operands_vector = XVEC (copy, 3);
2376 map->copy_asm_constraints_vector = XVEC (copy, 4);
2382 /* Substitute known constant values into INSN, if that is valid. */
2385 try_constants (insn, map)
2387 struct inline_remap *map;
2392 subst_constants (&PATTERN (insn), insn, map);
2394 /* Apply the changes if they are valid; otherwise discard them. */
2395 apply_change_group ();
2397 /* Show we don't know the value of anything stored or clobbered. */
2398 note_stores (PATTERN (insn), mark_stores);
2399 map->last_pc_value = 0;
2401 map->last_cc0_value = 0;
2404 /* Set up any constant equivalences made in this insn. */
2405 for (i = 0; i < map->num_sets; i++)
2407 if (GET_CODE (map->equiv_sets[i].dest) == REG)
2409 int regno = REGNO (map->equiv_sets[i].dest);
2411 if (regno < map->const_equiv_map_size
2412 && (map->const_equiv_map[regno] == 0
2413 /* Following clause is a hack to make case work where GNU C++
2414 reassigns a variable to make cse work right. */
2415 || ! rtx_equal_p (map->const_equiv_map[regno],
2416 map->equiv_sets[i].equiv)))
2418 map->const_equiv_map[regno] = map->equiv_sets[i].equiv;
2419 map->const_age_map[regno] = map->const_age;
2422 else if (map->equiv_sets[i].dest == pc_rtx)
2423 map->last_pc_value = map->equiv_sets[i].equiv;
2425 else if (map->equiv_sets[i].dest == cc0_rtx)
2426 map->last_cc0_value = map->equiv_sets[i].equiv;
2431 /* Substitute known constants for pseudo regs in the contents of LOC,
2432 which are part of INSN.
2433 If INSN is zero, the substitution should always be done (this is used to
2435 These changes are taken out by try_constants if the result is not valid.
2437 Note that we are more concerned with determining when the result of a SET
2438 is a constant, for further propagation, than actually inserting constants
2439 into insns; cse will do the latter task better.
2441 This function is also used to adjust address of items previously addressed
2442 via the virtual stack variable or virtual incoming arguments registers. */
2445 subst_constants (loc, insn, map)
2448 struct inline_remap *map;
2452 register enum rtx_code code;
2453 register char *format_ptr;
2454 int num_changes = num_validated_changes ();
2456 enum machine_mode op0_mode;
2458 code = GET_CODE (x);
2473 validate_change (insn, loc, map->last_cc0_value, 1);
2479 /* The only thing we can do with a USE or CLOBBER is possibly do
2480 some substitutions in a MEM within it. */
2481 if (GET_CODE (XEXP (x, 0)) == MEM)
2482 subst_constants (&XEXP (XEXP (x, 0), 0), insn, map);
2486 /* Substitute for parms and known constants. Don't replace
2487 hard regs used as user variables with constants. */
2489 int regno = REGNO (x);
2491 if (! (regno < FIRST_PSEUDO_REGISTER && REG_USERVAR_P (x))
2492 && regno < map->const_equiv_map_size
2493 && map->const_equiv_map[regno] != 0
2494 && map->const_age_map[regno] >= map->const_age)
2495 validate_change (insn, loc, map->const_equiv_map[regno], 1);
2500 /* SUBREG applied to something other than a reg
2501 should be treated as ordinary, since that must
2502 be a special hack and we don't know how to treat it specially.
2503 Consider for example mulsidi3 in m68k.md.
2504 Ordinary SUBREG of a REG needs this special treatment. */
2505 if (GET_CODE (SUBREG_REG (x)) == REG)
2507 rtx inner = SUBREG_REG (x);
2510 /* We can't call subst_constants on &SUBREG_REG (x) because any
2511 constant or SUBREG wouldn't be valid inside our SUBEG. Instead,
2512 see what is inside, try to form the new SUBREG and see if that is
2513 valid. We handle two cases: extracting a full word in an
2514 integral mode and extracting the low part. */
2515 subst_constants (&inner, NULL_RTX, map);
2517 if (GET_MODE_CLASS (GET_MODE (x)) == MODE_INT
2518 && GET_MODE_SIZE (GET_MODE (x)) == UNITS_PER_WORD
2519 && GET_MODE (SUBREG_REG (x)) != VOIDmode)
2520 new = operand_subword (inner, SUBREG_WORD (x), 0,
2521 GET_MODE (SUBREG_REG (x)));
2523 if (new == 0 && subreg_lowpart_p (x))
2524 new = gen_lowpart_common (GET_MODE (x), inner);
2527 validate_change (insn, loc, new, 1);
2534 subst_constants (&XEXP (x, 0), insn, map);
2536 /* If a memory address got spoiled, change it back. */
2537 if (insn != 0 && num_validated_changes () != num_changes
2538 && !memory_address_p (GET_MODE (x), XEXP (x, 0)))
2539 cancel_changes (num_changes);
2544 /* Substitute constants in our source, and in any arguments to a
2545 complex (e..g, ZERO_EXTRACT) destination, but not in the destination
2547 rtx *dest_loc = &SET_DEST (x);
2548 rtx dest = *dest_loc;
2551 subst_constants (&SET_SRC (x), insn, map);
2554 while (GET_CODE (*dest_loc) == ZERO_EXTRACT
2555 /* By convention, we always use ZERO_EXTRACT in the dest. */
2556 /* || GET_CODE (*dest_loc) == SIGN_EXTRACT */
2557 || GET_CODE (*dest_loc) == SUBREG
2558 || GET_CODE (*dest_loc) == STRICT_LOW_PART)
2560 if (GET_CODE (*dest_loc) == ZERO_EXTRACT)
2562 subst_constants (&XEXP (*dest_loc, 1), insn, map);
2563 subst_constants (&XEXP (*dest_loc, 2), insn, map);
2565 dest_loc = &XEXP (*dest_loc, 0);
2568 /* Do substitute in the address of a destination in memory. */
2569 if (GET_CODE (*dest_loc) == MEM)
2570 subst_constants (&XEXP (*dest_loc, 0), insn, map);
2572 /* Check for the case of DEST a SUBREG, both it and the underlying
2573 register are less than one word, and the SUBREG has the wider mode.
2574 In the case, we are really setting the underlying register to the
2575 source converted to the mode of DEST. So indicate that. */
2576 if (GET_CODE (dest) == SUBREG
2577 && GET_MODE_SIZE (GET_MODE (dest)) <= UNITS_PER_WORD
2578 && GET_MODE_SIZE (GET_MODE (SUBREG_REG (dest))) <= UNITS_PER_WORD
2579 && (GET_MODE_SIZE (GET_MODE (SUBREG_REG (dest)))
2580 <= GET_MODE_SIZE (GET_MODE (dest)))
2581 && (tem = gen_lowpart_if_possible (GET_MODE (SUBREG_REG (dest)),
2583 src = tem, dest = SUBREG_REG (dest);
2585 /* If storing a recognizable value save it for later recording. */
2586 if ((map->num_sets < MAX_RECOG_OPERANDS)
2587 && (CONSTANT_P (src)
2588 || (GET_CODE (src) == PLUS
2589 && GET_CODE (XEXP (src, 0)) == REG
2590 && REGNO (XEXP (src, 0)) >= FIRST_VIRTUAL_REGISTER
2591 && REGNO (XEXP (src, 0)) <= LAST_VIRTUAL_REGISTER
2592 && CONSTANT_P (XEXP (src, 1)))
2593 || GET_CODE (src) == COMPARE
2598 && (src == pc_rtx || GET_CODE (src) == RETURN
2599 || GET_CODE (src) == LABEL_REF))))
2601 /* Normally, this copy won't do anything. But, if SRC is a COMPARE
2602 it will cause us to save the COMPARE with any constants
2603 substituted, which is what we want for later. */
2604 map->equiv_sets[map->num_sets].equiv = copy_rtx (src);
2605 map->equiv_sets[map->num_sets++].dest = dest;
2612 format_ptr = GET_RTX_FORMAT (code);
2614 /* If the first operand is an expression, save its mode for later. */
2615 if (*format_ptr == 'e')
2616 op0_mode = GET_MODE (XEXP (x, 0));
2618 for (i = 0; i < GET_RTX_LENGTH (code); i++)
2620 switch (*format_ptr++)
2627 subst_constants (&XEXP (x, i), insn, map);
2637 if (XVEC (x, i) != NULL && XVECLEN (x, i) != 0)
2640 for (j = 0; j < XVECLEN (x, i); j++)
2641 subst_constants (&XVECEXP (x, i, j), insn, map);
2650 /* If this is a commutative operation, move a constant to the second
2651 operand unless the second operand is already a CONST_INT. */
2652 if ((GET_RTX_CLASS (code) == 'c' || code == NE || code == EQ)
2653 && CONSTANT_P (XEXP (x, 0)) && GET_CODE (XEXP (x, 1)) != CONST_INT)
2655 rtx tem = XEXP (x, 0);
2656 validate_change (insn, &XEXP (x, 0), XEXP (x, 1), 1);
2657 validate_change (insn, &XEXP (x, 1), tem, 1);
2660 /* Simplify the expression in case we put in some constants. */
2661 switch (GET_RTX_CLASS (code))
2664 new = simplify_unary_operation (code, GET_MODE (x),
2665 XEXP (x, 0), op0_mode);
2670 enum machine_mode op_mode = GET_MODE (XEXP (x, 0));
2671 if (op_mode == VOIDmode)
2672 op_mode = GET_MODE (XEXP (x, 1));
2673 new = simplify_relational_operation (code, op_mode,
2674 XEXP (x, 0), XEXP (x, 1));
2675 #ifdef FLOAT_STORE_FLAG_VALUE
2676 if (new != 0 && GET_MODE_CLASS (GET_MODE (x)) == MODE_FLOAT)
2677 new = ((new == const0_rtx) ? CONST0_RTX (GET_MODE (x))
2678 : CONST_DOUBLE_FROM_REAL_VALUE (FLOAT_STORE_FLAG_VALUE,
2686 new = simplify_binary_operation (code, GET_MODE (x),
2687 XEXP (x, 0), XEXP (x, 1));
2692 new = simplify_ternary_operation (code, GET_MODE (x), op0_mode,
2693 XEXP (x, 0), XEXP (x, 1), XEXP (x, 2));
2698 validate_change (insn, loc, new, 1);
2701 /* Show that register modified no longer contain known constants. We are
2702 called from note_stores with parts of the new insn. */
2705 mark_stores (dest, x)
2710 enum machine_mode mode;
2712 /* DEST is always the innermost thing set, except in the case of
2713 SUBREGs of hard registers. */
2715 if (GET_CODE (dest) == REG)
2716 regno = REGNO (dest), mode = GET_MODE (dest);
2717 else if (GET_CODE (dest) == SUBREG && GET_CODE (SUBREG_REG (dest)) == REG)
2719 regno = REGNO (SUBREG_REG (dest)) + SUBREG_WORD (dest);
2720 mode = GET_MODE (SUBREG_REG (dest));
2725 int last_reg = (regno >= FIRST_PSEUDO_REGISTER ? regno
2726 : regno + HARD_REGNO_NREGS (regno, mode) - 1);
2729 for (i = regno; i <= last_reg; i++)
2730 if (i < global_const_equiv_map_size)
2731 global_const_equiv_map[i] = 0;
2735 /* If any CONST expressions with RTX_INTEGRATED_P are present in the rtx
2736 pointed to by PX, they represent constants in the constant pool.
2737 Replace these with a new memory reference obtained from force_const_mem.
2738 Similarly, ADDRESS expressions with RTX_INTEGRATED_P represent the
2739 address of a constant pool entry. Replace them with the address of
2740 a new constant pool entry obtained from force_const_mem. */
2743 restore_constants (px)
2753 if (GET_CODE (x) == CONST_DOUBLE)
2755 /* We have to make a new CONST_DOUBLE to ensure that we account for
2756 it correctly. Using the old CONST_DOUBLE_MEM data is wrong. */
2757 if (GET_MODE_CLASS (GET_MODE (x)) == MODE_FLOAT)
2761 REAL_VALUE_FROM_CONST_DOUBLE (d, x);
2762 *px = CONST_DOUBLE_FROM_REAL_VALUE (d, GET_MODE (x));
2765 *px = immed_double_const (CONST_DOUBLE_LOW (x), CONST_DOUBLE_HIGH (x),
2769 else if (RTX_INTEGRATED_P (x) && GET_CODE (x) == CONST)
2771 restore_constants (&XEXP (x, 0));
2772 *px = validize_mem (force_const_mem (GET_MODE (x), XEXP (x, 0)));
2774 else if (RTX_INTEGRATED_P (x) && GET_CODE (x) == SUBREG)
2776 /* This must be (subreg/i:M1 (const/i:M2 ...) 0). */
2777 rtx new = XEXP (SUBREG_REG (x), 0);
2779 restore_constants (&new);
2780 new = force_const_mem (GET_MODE (SUBREG_REG (x)), new);
2781 PUT_MODE (new, GET_MODE (x));
2782 *px = validize_mem (new);
2784 else if (RTX_INTEGRATED_P (x) && GET_CODE (x) == ADDRESS)
2786 restore_constants (&XEXP (x, 0));
2787 *px = XEXP (force_const_mem (GET_MODE (x), XEXP (x, 0)), 0);
2791 fmt = GET_RTX_FORMAT (GET_CODE (x));
2792 for (i = 0; i < GET_RTX_LENGTH (GET_CODE (x)); i++)
2797 for (j = 0; j < XVECLEN (x, i); j++)
2798 restore_constants (&XVECEXP (x, i, j));
2802 restore_constants (&XEXP (x, i));
2809 /* Given a pointer to some BLOCK node, if the BLOCK_ABSTRACT_ORIGIN for the
2810 given BLOCK node is NULL, set the BLOCK_ABSTRACT_ORIGIN for the node so
2811 that it points to the node itself, thus indicating that the node is its
2812 own (abstract) origin. Additionally, if the BLOCK_ABSTRACT_ORIGIN for
2813 the given node is NULL, recursively descend the decl/block tree which
2814 it is the root of, and for each other ..._DECL or BLOCK node contained
2815 therein whose DECL_ABSTRACT_ORIGINs or BLOCK_ABSTRACT_ORIGINs are also
2816 still NULL, set *their* DECL_ABSTRACT_ORIGIN or BLOCK_ABSTRACT_ORIGIN
2817 values to point to themselves. */
2820 set_block_origin_self (stmt)
2823 if (BLOCK_ABSTRACT_ORIGIN (stmt) == NULL_TREE)
2825 BLOCK_ABSTRACT_ORIGIN (stmt) = stmt;
2828 register tree local_decl;
2830 for (local_decl = BLOCK_VARS (stmt);
2831 local_decl != NULL_TREE;
2832 local_decl = TREE_CHAIN (local_decl))
2833 set_decl_origin_self (local_decl); /* Potential recursion. */
2837 register tree subblock;
2839 for (subblock = BLOCK_SUBBLOCKS (stmt);
2840 subblock != NULL_TREE;
2841 subblock = BLOCK_CHAIN (subblock))
2842 set_block_origin_self (subblock); /* Recurse. */
2847 /* Given a pointer to some ..._DECL node, if the DECL_ABSTRACT_ORIGIN for
2848 the given ..._DECL node is NULL, set the DECL_ABSTRACT_ORIGIN for the
2849 node to so that it points to the node itself, thus indicating that the
2850 node represents its own (abstract) origin. Additionally, if the
2851 DECL_ABSTRACT_ORIGIN for the given node is NULL, recursively descend
2852 the decl/block tree of which the given node is the root of, and for
2853 each other ..._DECL or BLOCK node contained therein whose
2854 DECL_ABSTRACT_ORIGINs or BLOCK_ABSTRACT_ORIGINs are also still NULL,
2855 set *their* DECL_ABSTRACT_ORIGIN or BLOCK_ABSTRACT_ORIGIN values to
2856 point to themselves. */
2859 set_decl_origin_self (decl)
2862 if (DECL_ABSTRACT_ORIGIN (decl) == NULL_TREE)
2864 DECL_ABSTRACT_ORIGIN (decl) = decl;
2865 if (TREE_CODE (decl) == FUNCTION_DECL)
2869 for (arg = DECL_ARGUMENTS (decl); arg; arg = TREE_CHAIN (arg))
2870 DECL_ABSTRACT_ORIGIN (arg) = arg;
2871 if (DECL_INITIAL (decl) != NULL_TREE)
2872 set_block_origin_self (DECL_INITIAL (decl));
2877 /* Given a pointer to some BLOCK node, and a boolean value to set the
2878 "abstract" flags to, set that value into the BLOCK_ABSTRACT flag for
2879 the given block, and for all local decls and all local sub-blocks
2880 (recursively) which are contained therein. */
2883 set_block_abstract_flags (stmt, setting)
2885 register int setting;
2887 BLOCK_ABSTRACT (stmt) = setting;
2890 register tree local_decl;
2892 for (local_decl = BLOCK_VARS (stmt);
2893 local_decl != NULL_TREE;
2894 local_decl = TREE_CHAIN (local_decl))
2895 set_decl_abstract_flags (local_decl, setting);
2899 register tree subblock;
2901 for (subblock = BLOCK_SUBBLOCKS (stmt);
2902 subblock != NULL_TREE;
2903 subblock = BLOCK_CHAIN (subblock))
2904 set_block_abstract_flags (subblock, setting);
2908 /* Given a pointer to some ..._DECL node, and a boolean value to set the
2909 "abstract" flags to, set that value into the DECL_ABSTRACT flag for the
2910 given decl, and (in the case where the decl is a FUNCTION_DECL) also
2911 set the abstract flags for all of the parameters, local vars, local
2912 blocks and sub-blocks (recursively) to the same setting. */
2915 set_decl_abstract_flags (decl, setting)
2917 register int setting;
2919 DECL_ABSTRACT (decl) = setting;
2920 if (TREE_CODE (decl) == FUNCTION_DECL)
2924 for (arg = DECL_ARGUMENTS (decl); arg; arg = TREE_CHAIN (arg))
2925 DECL_ABSTRACT (arg) = setting;
2926 if (DECL_INITIAL (decl) != NULL_TREE)
2927 set_block_abstract_flags (DECL_INITIAL (decl), setting);
2931 /* Output the assembly language code for the function FNDECL
2932 from its DECL_SAVED_INSNS. Used for inline functions that are output
2933 at end of compilation instead of where they came in the source. */
2936 output_inline_function (fndecl)
2942 if (output_bytecode)
2944 warning ("`inline' ignored for bytecode output");
2948 head = DECL_SAVED_INSNS (fndecl);
2949 current_function_decl = fndecl;
2951 /* This call is only used to initialize global variables. */
2952 init_function_start (fndecl, "lossage", 1);
2954 /* Redo parameter determinations in case the FUNCTION_...
2955 macros took machine-specific actions that need to be redone. */
2956 assign_parms (fndecl, 1);
2958 /* Set stack frame size. */
2959 assign_stack_local (BLKmode, DECL_FRAME_SIZE (fndecl), 0);
2961 restore_reg_data (FIRST_PARM_INSN (head));
2963 stack_slot_list = STACK_SLOT_LIST (head);
2965 if (FUNCTION_FLAGS (head) & FUNCTION_FLAGS_CALLS_ALLOCA)
2966 current_function_calls_alloca = 1;
2968 if (FUNCTION_FLAGS (head) & FUNCTION_FLAGS_CALLS_SETJMP)
2969 current_function_calls_setjmp = 1;
2971 if (FUNCTION_FLAGS (head) & FUNCTION_FLAGS_CALLS_LONGJMP)
2972 current_function_calls_longjmp = 1;
2974 if (FUNCTION_FLAGS (head) & FUNCTION_FLAGS_RETURNS_STRUCT)
2975 current_function_returns_struct = 1;
2977 if (FUNCTION_FLAGS (head) & FUNCTION_FLAGS_RETURNS_PCC_STRUCT)
2978 current_function_returns_pcc_struct = 1;
2980 if (FUNCTION_FLAGS (head) & FUNCTION_FLAGS_NEEDS_CONTEXT)
2981 current_function_needs_context = 1;
2983 if (FUNCTION_FLAGS (head) & FUNCTION_FLAGS_HAS_NONLOCAL_LABEL)
2984 current_function_has_nonlocal_label = 1;
2986 if (FUNCTION_FLAGS (head) & FUNCTION_FLAGS_RETURNS_POINTER)
2987 current_function_returns_pointer = 1;
2989 if (FUNCTION_FLAGS (head) & FUNCTION_FLAGS_USES_CONST_POOL)
2990 current_function_uses_const_pool = 1;
2992 if (FUNCTION_FLAGS (head) & FUNCTION_FLAGS_USES_PIC_OFFSET_TABLE)
2993 current_function_uses_pic_offset_table = 1;
2995 current_function_outgoing_args_size = OUTGOING_ARGS_SIZE (head);
2996 current_function_pops_args = POPS_ARGS (head);
2998 /* There is no need to output a return label again. */
3001 expand_function_end (DECL_SOURCE_FILE (fndecl), DECL_SOURCE_LINE (fndecl), 0);
3003 /* Find last insn and rebuild the constant pool. */
3004 for (last = FIRST_PARM_INSN (head);
3005 NEXT_INSN (last); last = NEXT_INSN (last))
3007 if (GET_RTX_CLASS (GET_CODE (last)) == 'i')
3009 restore_constants (&PATTERN (last));
3010 restore_constants (®_NOTES (last));
3014 set_new_first_and_last_insn (FIRST_PARM_INSN (head), last);
3015 set_new_first_and_last_label_num (FIRST_LABELNO (head), LAST_LABELNO (head));
3017 /* We must have already output DWARF debugging information for the
3018 original (abstract) inline function declaration/definition, so
3019 we want to make sure that the debugging information we generate
3020 for this special instance of the inline function refers back to
3021 the information we already generated. To make sure that happens,
3022 we simply have to set the DECL_ABSTRACT_ORIGIN for the function
3023 node (and for all of the local ..._DECL nodes which are its children)
3024 so that they all point to themselves. */
3026 set_decl_origin_self (fndecl);
3028 /* Compile this function all the way down to assembly code. */
3029 rest_of_compilation (fndecl);
3031 current_function_decl = 0;