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));
1240 /* Make sure this formal has some correspondence in the users code
1241 * before emitting any line notes for it. */
1242 if (DECL_SOURCE_LINE (formal))
1244 rtx note = emit_note (DECL_SOURCE_FILE (formal),
1245 DECL_SOURCE_LINE (formal));
1247 RTX_INTEGRATED_P (note) = 1;
1251 loc = RTVEC_ELT (arg_vector, i);
1253 /* If this is an object passed by invisible reference, we copy the
1254 object into a stack slot and save its address. If this will go
1255 into memory, we do nothing now. Otherwise, we just expand the
1257 if (GET_CODE (loc) == MEM && GET_CODE (XEXP (loc, 0)) == REG
1258 && REGNO (XEXP (loc, 0)) > LAST_VIRTUAL_REGISTER)
1261 = assign_stack_temp (TYPE_MODE (TREE_TYPE (arg)),
1262 int_size_in_bytes (TREE_TYPE (arg)), 1);
1264 store_expr (arg, stack_slot, 0);
1266 arg_vals[i] = XEXP (stack_slot, 0);
1269 else if (GET_CODE (loc) != MEM)
1271 if (GET_MODE (loc) != TYPE_MODE (TREE_TYPE (arg)))
1272 /* The mode if LOC and ARG can differ if LOC was a variable
1273 that had its mode promoted via PROMOTED_MODE. */
1274 arg_vals[i] = convert_modes (GET_MODE (loc),
1275 TYPE_MODE (TREE_TYPE (arg)),
1276 expand_expr (arg, NULL_RTX, mode,
1278 TREE_UNSIGNED (TREE_TYPE (formal)));
1280 arg_vals[i] = expand_expr (arg, NULL_RTX, mode, EXPAND_SUM);
1285 if (arg_vals[i] != 0
1286 && (! TREE_READONLY (formal)
1287 /* If the parameter is not read-only, copy our argument through
1288 a register. Also, we cannot use ARG_VALS[I] if it overlaps
1289 TARGET in any way. In the inline function, they will likely
1290 be two different pseudos, and `safe_from_p' will make all
1291 sorts of smart assumptions about their not conflicting.
1292 But if ARG_VALS[I] overlaps TARGET, these assumptions are
1293 wrong, so put ARG_VALS[I] into a fresh register.
1294 Don't worry about invisible references, since their stack
1295 temps will never overlap the target. */
1298 && (GET_CODE (arg_vals[i]) == REG
1299 || GET_CODE (arg_vals[i]) == SUBREG
1300 || GET_CODE (arg_vals[i]) == MEM)
1301 && reg_overlap_mentioned_p (arg_vals[i], target))
1302 /* ??? We must always copy a SUBREG into a REG, because it might
1303 get substituted into an address, and not all ports correctly
1304 handle SUBREGs in addresses. */
1305 || (GET_CODE (arg_vals[i]) == SUBREG)))
1306 arg_vals[i] = copy_to_mode_reg (GET_MODE (loc), arg_vals[i]);
1309 /* Allocate the structures we use to remap things. */
1311 map = (struct inline_remap *) alloca (sizeof (struct inline_remap));
1312 map->fndecl = fndecl;
1314 map->reg_map = (rtx *) alloca (max_regno * sizeof (rtx));
1315 bzero ((char *) map->reg_map, max_regno * sizeof (rtx));
1317 map->label_map = (rtx *)alloca ((max_labelno - min_labelno) * sizeof (rtx));
1318 map->label_map -= min_labelno;
1320 map->insn_map = (rtx *) alloca (INSN_UID (header) * sizeof (rtx));
1321 bzero ((char *) map->insn_map, INSN_UID (header) * sizeof (rtx));
1322 map->min_insnno = 0;
1323 map->max_insnno = INSN_UID (header);
1325 map->integrating = 1;
1327 /* const_equiv_map maps pseudos in our routine to constants, so it needs to
1328 be large enough for all our pseudos. This is the number we are currently
1329 using plus the number in the called routine, plus 15 for each arg,
1330 five to compute the virtual frame pointer, and five for the return value.
1331 This should be enough for most cases. We do not reference entries
1332 outside the range of the map.
1334 ??? These numbers are quite arbitrary and were obtained by
1335 experimentation. At some point, we should try to allocate the
1336 table after all the parameters are set up so we an more accurately
1337 estimate the number of pseudos we will need. */
1339 map->const_equiv_map_size
1340 = max_reg_num () + (max_regno - FIRST_PSEUDO_REGISTER) + 15 * nargs + 10;
1342 map->const_equiv_map
1343 = (rtx *)alloca (map->const_equiv_map_size * sizeof (rtx));
1344 bzero ((char *) map->const_equiv_map,
1345 map->const_equiv_map_size * sizeof (rtx));
1348 = (unsigned *)alloca (map->const_equiv_map_size * sizeof (unsigned));
1349 bzero ((char *) map->const_age_map,
1350 map->const_equiv_map_size * sizeof (unsigned));
1353 /* Record the current insn in case we have to set up pointers to frame
1354 and argument memory blocks. */
1355 map->insns_at_start = get_last_insn ();
1357 /* Update the outgoing argument size to allow for those in the inlined
1359 if (OUTGOING_ARGS_SIZE (header) > current_function_outgoing_args_size)
1360 current_function_outgoing_args_size = OUTGOING_ARGS_SIZE (header);
1362 /* If the inline function needs to make PIC references, that means
1363 that this function's PIC offset table must be used. */
1364 if (FUNCTION_FLAGS (header) & FUNCTION_FLAGS_USES_PIC_OFFSET_TABLE)
1365 current_function_uses_pic_offset_table = 1;
1367 /* If this function needs a context, set it up. */
1368 if (FUNCTION_FLAGS (header) & FUNCTION_FLAGS_NEEDS_CONTEXT)
1369 static_chain_value = lookup_static_chain (fndecl);
1371 /* Process each argument. For each, set up things so that the function's
1372 reference to the argument will refer to the argument being passed.
1373 We only replace REG with REG here. Any simplifications are done
1374 via const_equiv_map.
1376 We make two passes: In the first, we deal with parameters that will
1377 be placed into registers, since we need to ensure that the allocated
1378 register number fits in const_equiv_map. Then we store all non-register
1379 parameters into their memory location. */
1381 /* Don't try to free temp stack slots here, because we may put one of the
1382 parameters into a temp stack slot. */
1384 for (i = 0; i < nargs; i++)
1386 rtx copy = arg_vals[i];
1388 loc = RTVEC_ELT (arg_vector, i);
1390 /* There are three cases, each handled separately. */
1391 if (GET_CODE (loc) == MEM && GET_CODE (XEXP (loc, 0)) == REG
1392 && REGNO (XEXP (loc, 0)) > LAST_VIRTUAL_REGISTER)
1394 /* This must be an object passed by invisible reference (it could
1395 also be a variable-sized object, but we forbid inlining functions
1396 with variable-sized arguments). COPY is the address of the
1397 actual value (this computation will cause it to be copied). We
1398 map that address for the register, noting the actual address as
1399 an equivalent in case it can be substituted into the insns. */
1401 if (GET_CODE (copy) != REG)
1403 temp = copy_addr_to_reg (copy);
1404 if ((CONSTANT_P (copy) || FIXED_BASE_PLUS_P (copy))
1405 && REGNO (temp) < map->const_equiv_map_size)
1407 map->const_equiv_map[REGNO (temp)] = copy;
1408 map->const_age_map[REGNO (temp)] = CONST_AGE_PARM;
1412 map->reg_map[REGNO (XEXP (loc, 0))] = copy;
1414 else if (GET_CODE (loc) == MEM)
1416 /* This is the case of a parameter that lives in memory.
1417 It will live in the block we allocate in the called routine's
1418 frame that simulates the incoming argument area. Do nothing
1419 now; we will call store_expr later. */
1422 else if (GET_CODE (loc) == REG)
1424 /* This is the good case where the parameter is in a register.
1425 If it is read-only and our argument is a constant, set up the
1426 constant equivalence.
1428 If LOC is REG_USERVAR_P, the usual case, COPY must also have
1429 that flag set if it is a register.
1431 Also, don't allow hard registers here; they might not be valid
1432 when substituted into insns. */
1434 if ((GET_CODE (copy) != REG && GET_CODE (copy) != SUBREG)
1435 || (GET_CODE (copy) == REG && REG_USERVAR_P (loc)
1436 && ! REG_USERVAR_P (copy))
1437 || (GET_CODE (copy) == REG
1438 && REGNO (copy) < FIRST_PSEUDO_REGISTER))
1440 temp = copy_to_mode_reg (GET_MODE (loc), copy);
1441 REG_USERVAR_P (temp) = REG_USERVAR_P (loc);
1442 if ((CONSTANT_P (copy) || FIXED_BASE_PLUS_P (copy))
1443 && REGNO (temp) < map->const_equiv_map_size)
1445 map->const_equiv_map[REGNO (temp)] = copy;
1446 map->const_age_map[REGNO (temp)] = CONST_AGE_PARM;
1450 map->reg_map[REGNO (loc)] = copy;
1452 else if (GET_CODE (loc) == CONCAT)
1454 /* This is the good case where the parameter is in a
1455 pair of separate pseudos.
1456 If it is read-only and our argument is a constant, set up the
1457 constant equivalence.
1459 If LOC is REG_USERVAR_P, the usual case, COPY must also have
1460 that flag set if it is a register.
1462 Also, don't allow hard registers here; they might not be valid
1463 when substituted into insns. */
1464 rtx locreal = gen_realpart (GET_MODE (XEXP (loc, 0)), loc);
1465 rtx locimag = gen_imagpart (GET_MODE (XEXP (loc, 0)), loc);
1466 rtx copyreal = gen_realpart (GET_MODE (locreal), copy);
1467 rtx copyimag = gen_imagpart (GET_MODE (locimag), copy);
1469 if ((GET_CODE (copyreal) != REG && GET_CODE (copyreal) != SUBREG)
1470 || (GET_CODE (copyreal) == REG && REG_USERVAR_P (locreal)
1471 && ! REG_USERVAR_P (copyreal))
1472 || (GET_CODE (copyreal) == REG
1473 && REGNO (copyreal) < FIRST_PSEUDO_REGISTER))
1475 temp = copy_to_mode_reg (GET_MODE (locreal), copyreal);
1476 REG_USERVAR_P (temp) = REG_USERVAR_P (locreal);
1477 if ((CONSTANT_P (copyreal) || FIXED_BASE_PLUS_P (copyreal))
1478 && REGNO (temp) < map->const_equiv_map_size)
1480 map->const_equiv_map[REGNO (temp)] = copyreal;
1481 map->const_age_map[REGNO (temp)] = CONST_AGE_PARM;
1485 map->reg_map[REGNO (locreal)] = copyreal;
1487 if ((GET_CODE (copyimag) != REG && GET_CODE (copyimag) != SUBREG)
1488 || (GET_CODE (copyimag) == REG && REG_USERVAR_P (locimag)
1489 && ! REG_USERVAR_P (copyimag))
1490 || (GET_CODE (copyimag) == REG
1491 && REGNO (copyimag) < FIRST_PSEUDO_REGISTER))
1493 temp = copy_to_mode_reg (GET_MODE (locimag), copyimag);
1494 REG_USERVAR_P (temp) = REG_USERVAR_P (locimag);
1495 if ((CONSTANT_P (copyimag) || FIXED_BASE_PLUS_P (copyimag))
1496 && REGNO (temp) < map->const_equiv_map_size)
1498 map->const_equiv_map[REGNO (temp)] = copyimag;
1499 map->const_age_map[REGNO (temp)] = CONST_AGE_PARM;
1503 map->reg_map[REGNO (locimag)] = copyimag;
1509 /* Now do the parameters that will be placed in memory. */
1511 for (formal = DECL_ARGUMENTS (fndecl), i = 0;
1512 formal; formal = TREE_CHAIN (formal), i++)
1514 loc = RTVEC_ELT (arg_vector, i);
1516 if (GET_CODE (loc) == MEM
1517 /* Exclude case handled above. */
1518 && ! (GET_CODE (XEXP (loc, 0)) == REG
1519 && REGNO (XEXP (loc, 0)) > LAST_VIRTUAL_REGISTER))
1521 rtx note = emit_note (DECL_SOURCE_FILE (formal),
1522 DECL_SOURCE_LINE (formal));
1524 RTX_INTEGRATED_P (note) = 1;
1526 /* Compute the address in the area we reserved and store the
1528 temp = copy_rtx_and_substitute (loc, map);
1529 subst_constants (&temp, NULL_RTX, map);
1530 apply_change_group ();
1531 if (! memory_address_p (GET_MODE (temp), XEXP (temp, 0)))
1532 temp = change_address (temp, VOIDmode, XEXP (temp, 0));
1533 store_expr (arg_trees[i], temp, 0);
1537 /* Deal with the places that the function puts its result.
1538 We are driven by what is placed into DECL_RESULT.
1540 Initially, we assume that we don't have anything special handling for
1541 REG_FUNCTION_RETURN_VALUE_P. */
1543 map->inline_target = 0;
1544 loc = DECL_RTL (DECL_RESULT (fndecl));
1545 if (TYPE_MODE (type) == VOIDmode)
1546 /* There is no return value to worry about. */
1548 else if (GET_CODE (loc) == MEM)
1550 if (! structure_value_addr || ! aggregate_value_p (DECL_RESULT (fndecl)))
1553 /* Pass the function the address in which to return a structure value.
1554 Note that a constructor can cause someone to call us with
1555 STRUCTURE_VALUE_ADDR, but the initialization takes place
1556 via the first parameter, rather than the struct return address.
1558 We have two cases: If the address is a simple register indirect,
1559 use the mapping mechanism to point that register to our structure
1560 return address. Otherwise, store the structure return value into
1561 the place that it will be referenced from. */
1563 if (GET_CODE (XEXP (loc, 0)) == REG)
1565 temp = force_reg (Pmode, structure_value_addr);
1566 map->reg_map[REGNO (XEXP (loc, 0))] = temp;
1567 if ((CONSTANT_P (structure_value_addr)
1568 || (GET_CODE (structure_value_addr) == PLUS
1569 && XEXP (structure_value_addr, 0) == virtual_stack_vars_rtx
1570 && GET_CODE (XEXP (structure_value_addr, 1)) == CONST_INT))
1571 && REGNO (temp) < map->const_equiv_map_size)
1573 map->const_equiv_map[REGNO (temp)] = structure_value_addr;
1574 map->const_age_map[REGNO (temp)] = CONST_AGE_PARM;
1579 temp = copy_rtx_and_substitute (loc, map);
1580 subst_constants (&temp, NULL_RTX, map);
1581 apply_change_group ();
1582 emit_move_insn (temp, structure_value_addr);
1586 /* We will ignore the result value, so don't look at its structure.
1587 Note that preparations for an aggregate return value
1588 do need to be made (above) even if it will be ignored. */
1590 else if (GET_CODE (loc) == REG)
1592 /* The function returns an object in a register and we use the return
1593 value. Set up our target for remapping. */
1595 /* Machine mode function was declared to return. */
1596 enum machine_mode departing_mode = TYPE_MODE (type);
1597 /* (Possibly wider) machine mode it actually computes
1598 (for the sake of callers that fail to declare it right). */
1599 enum machine_mode arriving_mode
1600 = TYPE_MODE (TREE_TYPE (DECL_RESULT (fndecl)));
1603 /* Don't use MEMs as direct targets because on some machines
1604 substituting a MEM for a REG makes invalid insns.
1605 Let the combiner substitute the MEM if that is valid. */
1606 if (target == 0 || GET_CODE (target) != REG
1607 || GET_MODE (target) != departing_mode)
1608 target = gen_reg_rtx (departing_mode);
1610 /* If function's value was promoted before return,
1611 avoid machine mode mismatch when we substitute INLINE_TARGET.
1612 But TARGET is what we will return to the caller. */
1613 if (arriving_mode != departing_mode)
1614 reg_to_map = gen_rtx (SUBREG, arriving_mode, target, 0);
1616 reg_to_map = target;
1618 /* Usually, the result value is the machine's return register.
1619 Sometimes it may be a pseudo. Handle both cases. */
1620 if (REG_FUNCTION_VALUE_P (loc))
1621 map->inline_target = reg_to_map;
1623 map->reg_map[REGNO (loc)] = reg_to_map;
1626 /* Make new label equivalences for the labels in the called function. */
1627 for (i = min_labelno; i < max_labelno; i++)
1628 map->label_map[i] = gen_label_rtx ();
1630 /* Perform postincrements before actually calling the function. */
1633 /* Clean up stack so that variables might have smaller offsets. */
1634 do_pending_stack_adjust ();
1636 /* Save a copy of the location of const_equiv_map for mark_stores, called
1638 global_const_equiv_map = map->const_equiv_map;
1639 global_const_equiv_map_size = map->const_equiv_map_size;
1641 /* Now copy the insns one by one. Do this in two passes, first the insns and
1642 then their REG_NOTES, just like save_for_inline. */
1644 /* This loop is very similar to the loop in copy_loop_body in unroll.c. */
1646 for (insn = insns; insn; insn = NEXT_INSN (insn))
1648 rtx copy, pattern, set;
1650 map->orig_asm_operands_vector = 0;
1652 switch (GET_CODE (insn))
1655 pattern = PATTERN (insn);
1656 set = single_set (insn);
1658 if (GET_CODE (pattern) == USE
1659 && GET_CODE (XEXP (pattern, 0)) == REG
1660 && REG_FUNCTION_VALUE_P (XEXP (pattern, 0)))
1661 /* The (USE (REG n)) at return from the function should
1662 be ignored since we are changing (REG n) into
1666 /* Ignore setting a function value that we don't want to use. */
1667 if (map->inline_target == 0
1669 && GET_CODE (SET_DEST (set)) == REG
1670 && REG_FUNCTION_VALUE_P (SET_DEST (set)))
1672 if (volatile_refs_p (SET_SRC (set)))
1676 /* If we must not delete the source,
1677 load it into a new temporary. */
1678 copy = emit_insn (copy_rtx_and_substitute (pattern, map));
1680 new_set = single_set (copy);
1685 = gen_reg_rtx (GET_MODE (SET_DEST (new_set)));
1691 /* If this is setting the static chain rtx, omit it. */
1692 else if (static_chain_value != 0
1694 && GET_CODE (SET_DEST (set)) == REG
1695 && rtx_equal_p (SET_DEST (set),
1696 static_chain_incoming_rtx))
1699 /* If this is setting the static chain pseudo, set it from
1700 the value we want to give it instead. */
1701 else if (static_chain_value != 0
1703 && rtx_equal_p (SET_SRC (set),
1704 static_chain_incoming_rtx))
1706 rtx newdest = copy_rtx_and_substitute (SET_DEST (set), map);
1708 copy = emit_move_insn (newdest, static_chain_value);
1709 static_chain_value = 0;
1712 copy = emit_insn (copy_rtx_and_substitute (pattern, map));
1713 /* REG_NOTES will be copied later. */
1716 /* If this insn is setting CC0, it may need to look at
1717 the insn that uses CC0 to see what type of insn it is.
1718 In that case, the call to recog via validate_change will
1719 fail. So don't substitute constants here. Instead,
1720 do it when we emit the following insn.
1722 For example, see the pyr.md file. That machine has signed and
1723 unsigned compares. The compare patterns must check the
1724 following branch insn to see which what kind of compare to
1727 If the previous insn set CC0, substitute constants on it as
1729 if (sets_cc0_p (PATTERN (copy)) != 0)
1734 try_constants (cc0_insn, map);
1736 try_constants (copy, map);
1739 try_constants (copy, map);
1744 if (GET_CODE (PATTERN (insn)) == RETURN)
1746 if (local_return_label == 0)
1747 local_return_label = gen_label_rtx ();
1748 pattern = gen_jump (local_return_label);
1751 pattern = copy_rtx_and_substitute (PATTERN (insn), map);
1753 copy = emit_jump_insn (pattern);
1757 try_constants (cc0_insn, map);
1760 try_constants (copy, map);
1762 /* If this used to be a conditional jump insn but whose branch
1763 direction is now know, we must do something special. */
1764 if (condjump_p (insn) && ! simplejump_p (insn) && map->last_pc_value)
1767 /* The previous insn set cc0 for us. So delete it. */
1768 delete_insn (PREV_INSN (copy));
1771 /* If this is now a no-op, delete it. */
1772 if (map->last_pc_value == pc_rtx)
1778 /* Otherwise, this is unconditional jump so we must put a
1779 BARRIER after it. We could do some dead code elimination
1780 here, but jump.c will do it just as well. */
1786 pattern = copy_rtx_and_substitute (PATTERN (insn), map);
1787 copy = emit_call_insn (pattern);
1789 /* Because the USAGE information potentially contains objects other
1790 than hard registers, we need to copy it. */
1791 CALL_INSN_FUNCTION_USAGE (copy) =
1792 copy_rtx_and_substitute (CALL_INSN_FUNCTION_USAGE (insn), map);
1796 try_constants (cc0_insn, map);
1799 try_constants (copy, map);
1801 /* Be lazy and assume CALL_INSNs clobber all hard registers. */
1802 for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
1803 map->const_equiv_map[i] = 0;
1807 copy = emit_label (map->label_map[CODE_LABEL_NUMBER (insn)]);
1808 LABEL_NAME (copy) = LABEL_NAME (insn);
1813 copy = emit_barrier ();
1817 /* It is important to discard function-end and function-beg notes,
1818 so we have only one of each in the current function.
1819 Also, NOTE_INSN_DELETED notes aren't useful (save_for_inline
1820 deleted these in the copy used for continuing compilation,
1821 not the copy used for inlining). */
1822 if (NOTE_LINE_NUMBER (insn) != NOTE_INSN_FUNCTION_END
1823 && NOTE_LINE_NUMBER (insn) != NOTE_INSN_FUNCTION_BEG
1824 && NOTE_LINE_NUMBER (insn) != NOTE_INSN_DELETED)
1825 copy = emit_note (NOTE_SOURCE_FILE (insn), NOTE_LINE_NUMBER (insn));
1836 RTX_INTEGRATED_P (copy) = 1;
1838 map->insn_map[INSN_UID (insn)] = copy;
1841 /* Now copy the REG_NOTES. Increment const_age, so that only constants
1842 from parameters can be substituted in. These are the only ones that
1843 are valid across the entire function. */
1845 for (insn = insns; insn; insn = NEXT_INSN (insn))
1846 if (GET_RTX_CLASS (GET_CODE (insn)) == 'i'
1847 && map->insn_map[INSN_UID (insn)]
1848 && REG_NOTES (insn))
1850 rtx tem = copy_rtx_and_substitute (REG_NOTES (insn), map);
1851 /* We must also do subst_constants, in case one of our parameters
1852 has const type and constant value. */
1853 subst_constants (&tem, NULL_RTX, map);
1854 apply_change_group ();
1855 REG_NOTES (map->insn_map[INSN_UID (insn)]) = tem;
1858 if (local_return_label)
1859 emit_label (local_return_label);
1861 /* Make copies of the decls of the symbols in the inline function, so that
1862 the copies of the variables get declared in the current function. Set
1863 up things so that lookup_static_chain knows that to interpret registers
1864 in SAVE_EXPRs for TYPE_SIZEs as local. */
1866 inline_function_decl = fndecl;
1867 integrate_parm_decls (DECL_ARGUMENTS (fndecl), map, arg_vector);
1868 integrate_decl_tree ((tree) ORIGINAL_DECL_INITIAL (header), 0, map);
1869 inline_function_decl = 0;
1871 /* End the scope containing the copied formal parameter variables
1872 and copied LABEL_DECLs. */
1874 expand_end_bindings (getdecls (), 1, 1);
1875 block = poplevel (1, 1, 0);
1876 BLOCK_ABSTRACT_ORIGIN (block) = (DECL_ABSTRACT_ORIGIN (fndecl) == NULL
1877 ? fndecl : DECL_ABSTRACT_ORIGIN (fndecl));
1879 emit_line_note (input_filename, lineno);
1881 if (structure_value_addr)
1883 target = gen_rtx (MEM, TYPE_MODE (type),
1884 memory_address (TYPE_MODE (type), structure_value_addr));
1885 MEM_IN_STRUCT_P (target) = 1;
1890 /* Given a chain of PARM_DECLs, ARGS, copy each decl into a VAR_DECL,
1891 push all of those decls and give each one the corresponding home. */
1894 integrate_parm_decls (args, map, arg_vector)
1896 struct inline_remap *map;
1902 for (tail = args, i = 0; tail; tail = TREE_CHAIN (tail), i++)
1904 register tree decl = build_decl (VAR_DECL, DECL_NAME (tail),
1907 = copy_rtx_and_substitute (RTVEC_ELT (arg_vector, i), map);
1909 DECL_ARG_TYPE (decl) = DECL_ARG_TYPE (tail);
1910 /* We really should be setting DECL_INCOMING_RTL to something reasonable
1911 here, but that's going to require some more work. */
1912 /* DECL_INCOMING_RTL (decl) = ?; */
1913 /* These args would always appear unused, if not for this. */
1914 TREE_USED (decl) = 1;
1915 /* Prevent warning for shadowing with these. */
1916 DECL_ABSTRACT_ORIGIN (decl) = tail;
1918 /* Fully instantiate the address with the equivalent form so that the
1919 debugging information contains the actual register, instead of the
1920 virtual register. Do this by not passing an insn to
1922 subst_constants (&new_decl_rtl, NULL_RTX, map);
1923 apply_change_group ();
1924 DECL_RTL (decl) = new_decl_rtl;
1928 /* Given a BLOCK node LET, push decls and levels so as to construct in the
1929 current function a tree of contexts isomorphic to the one that is given.
1931 LEVEL indicates how far down into the BLOCK tree is the node we are
1932 currently traversing. It is always zero except for recursive calls.
1934 MAP, if nonzero, is a pointer to an inline_remap map which indicates how
1935 registers used in the DECL_RTL field should be remapped. If it is zero,
1936 no mapping is necessary. */
1939 integrate_decl_tree (let, level, map)
1942 struct inline_remap *map;
1949 for (t = BLOCK_VARS (let); t; t = TREE_CHAIN (t))
1953 push_obstacks_nochange ();
1954 saveable_allocation ();
1958 if (DECL_RTL (t) != 0)
1960 DECL_RTL (d) = copy_rtx_and_substitute (DECL_RTL (t), map);
1961 /* Fully instantiate the address with the equivalent form so that the
1962 debugging information contains the actual register, instead of the
1963 virtual register. Do this by not passing an insn to
1965 subst_constants (&DECL_RTL (d), NULL_RTX, map);
1966 apply_change_group ();
1968 /* These args would always appear unused, if not for this. */
1970 /* Prevent warning for shadowing with these. */
1971 DECL_ABSTRACT_ORIGIN (d) = t;
1973 if (DECL_LANG_SPECIFIC (d))
1979 for (t = BLOCK_SUBBLOCKS (let); t; t = TREE_CHAIN (t))
1980 integrate_decl_tree (t, level + 1, map);
1984 node = poplevel (1, 0, 0);
1987 TREE_USED (node) = TREE_USED (let);
1988 BLOCK_ABSTRACT_ORIGIN (node) = let;
1993 /* Create a new copy of an rtx.
1994 Recursively copies the operands of the rtx,
1995 except for those few rtx codes that are sharable.
1997 We always return an rtx that is similar to that incoming rtx, with the
1998 exception of possibly changing a REG to a SUBREG or vice versa. No
1999 rtl is ever emitted.
2001 Handle constants that need to be placed in the constant pool by
2002 calling `force_const_mem'. */
2005 copy_rtx_and_substitute (orig, map)
2007 struct inline_remap *map;
2009 register rtx copy, temp;
2011 register RTX_CODE code;
2012 register enum machine_mode mode;
2013 register char *format_ptr;
2019 code = GET_CODE (orig);
2020 mode = GET_MODE (orig);
2025 /* If the stack pointer register shows up, it must be part of
2026 stack-adjustments (*not* because we eliminated the frame pointer!).
2027 Small hard registers are returned as-is. Pseudo-registers
2028 go through their `reg_map'. */
2029 regno = REGNO (orig);
2030 if (regno <= LAST_VIRTUAL_REGISTER)
2032 /* Some hard registers are also mapped,
2033 but others are not translated. */
2034 if (map->reg_map[regno] != 0)
2035 return map->reg_map[regno];
2037 /* If this is the virtual frame pointer, make space in current
2038 function's stack frame for the stack frame of the inline function.
2040 Copy the address of this area into a pseudo. Map
2041 virtual_stack_vars_rtx to this pseudo and set up a constant
2042 equivalence for it to be the address. This will substitute the
2043 address into insns where it can be substituted and use the new
2044 pseudo where it can't. */
2045 if (regno == VIRTUAL_STACK_VARS_REGNUM)
2048 int size = DECL_FRAME_SIZE (map->fndecl);
2052 loc = assign_stack_temp (BLKmode, size, 1);
2053 loc = XEXP (loc, 0);
2054 #ifdef FRAME_GROWS_DOWNWARD
2055 /* In this case, virtual_stack_vars_rtx points to one byte
2056 higher than the top of the frame area. So compute the offset
2057 to one byte higher than our substitute frame.
2058 Keep the fake frame pointer aligned like a real one. */
2059 rounded = CEIL_ROUND (size, BIGGEST_ALIGNMENT / BITS_PER_UNIT);
2060 loc = plus_constant (loc, rounded);
2062 map->reg_map[regno] = temp
2063 = force_reg (Pmode, force_operand (loc, NULL_RTX));
2065 if (REGNO (temp) < map->const_equiv_map_size)
2067 map->const_equiv_map[REGNO (temp)] = loc;
2068 map->const_age_map[REGNO (temp)] = CONST_AGE_PARM;
2071 seq = gen_sequence ();
2073 emit_insn_after (seq, map->insns_at_start);
2076 else if (regno == VIRTUAL_INCOMING_ARGS_REGNUM)
2078 /* Do the same for a block to contain any arguments referenced
2081 int size = FUNCTION_ARGS_SIZE (DECL_SAVED_INSNS (map->fndecl));
2084 loc = assign_stack_temp (BLKmode, size, 1);
2085 loc = XEXP (loc, 0);
2086 /* When arguments grow downward, the virtual incoming
2087 args pointer points to the top of the argument block,
2088 so the remapped location better do the same. */
2089 #ifdef ARGS_GROW_DOWNWARD
2090 loc = plus_constant (loc, size);
2092 map->reg_map[regno] = temp
2093 = force_reg (Pmode, force_operand (loc, NULL_RTX));
2095 if (REGNO (temp) < map->const_equiv_map_size)
2097 map->const_equiv_map[REGNO (temp)] = loc;
2098 map->const_age_map[REGNO (temp)] = CONST_AGE_PARM;
2101 seq = gen_sequence ();
2103 emit_insn_after (seq, map->insns_at_start);
2106 else if (REG_FUNCTION_VALUE_P (orig))
2108 /* This is a reference to the function return value. If
2109 the function doesn't have a return value, error. If the
2110 mode doesn't agree, make a SUBREG. */
2111 if (map->inline_target == 0)
2112 /* Must be unrolling loops or replicating code if we
2113 reach here, so return the register unchanged. */
2115 else if (mode != GET_MODE (map->inline_target))
2116 return gen_lowpart (mode, map->inline_target);
2118 return map->inline_target;
2122 if (map->reg_map[regno] == NULL)
2124 map->reg_map[regno] = gen_reg_rtx (mode);
2125 REG_USERVAR_P (map->reg_map[regno]) = REG_USERVAR_P (orig);
2126 REG_LOOP_TEST_P (map->reg_map[regno]) = REG_LOOP_TEST_P (orig);
2127 RTX_UNCHANGING_P (map->reg_map[regno]) = RTX_UNCHANGING_P (orig);
2128 /* A reg with REG_FUNCTION_VALUE_P true will never reach here. */
2130 return map->reg_map[regno];
2133 copy = copy_rtx_and_substitute (SUBREG_REG (orig), map);
2134 /* SUBREG is ordinary, but don't make nested SUBREGs. */
2135 if (GET_CODE (copy) == SUBREG)
2136 return gen_rtx (SUBREG, GET_MODE (orig), SUBREG_REG (copy),
2137 SUBREG_WORD (orig) + SUBREG_WORD (copy));
2138 else if (GET_CODE (copy) == CONCAT)
2139 return (subreg_realpart_p (orig) ? XEXP (copy, 0) : XEXP (copy, 1));
2141 return gen_rtx (SUBREG, GET_MODE (orig), copy,
2142 SUBREG_WORD (orig));
2146 /* USE and CLOBBER are ordinary, but we convert (use (subreg foo))
2147 to (use foo) if the original insn didn't have a subreg.
2148 Removing the subreg distorts the VAX movstrhi pattern
2149 by changing the mode of an operand. */
2150 copy = copy_rtx_and_substitute (XEXP (orig, 0), map);
2151 if (GET_CODE (copy) == SUBREG && GET_CODE (XEXP (orig, 0)) != SUBREG)
2152 copy = SUBREG_REG (copy);
2153 return gen_rtx (code, VOIDmode, copy);
2156 LABEL_PRESERVE_P (map->label_map[CODE_LABEL_NUMBER (orig)])
2157 = LABEL_PRESERVE_P (orig);
2158 return map->label_map[CODE_LABEL_NUMBER (orig)];
2161 copy = gen_rtx (LABEL_REF, mode,
2162 LABEL_REF_NONLOCAL_P (orig) ? XEXP (orig, 0)
2163 : map->label_map[CODE_LABEL_NUMBER (XEXP (orig, 0))]);
2164 LABEL_OUTSIDE_LOOP_P (copy) = LABEL_OUTSIDE_LOOP_P (orig);
2166 /* The fact that this label was previously nonlocal does not mean
2167 it still is, so we must check if it is within the range of
2168 this function's labels. */
2169 LABEL_REF_NONLOCAL_P (copy)
2170 = (LABEL_REF_NONLOCAL_P (orig)
2171 && ! (CODE_LABEL_NUMBER (XEXP (copy, 0)) >= get_first_label_num ()
2172 && CODE_LABEL_NUMBER (XEXP (copy, 0)) < max_label_num ()));
2174 /* If we have made a nonlocal label local, it means that this
2175 inlined call will be refering to our nonlocal goto handler.
2176 So make sure we create one for this block; we normally would
2177 not since this is not otherwise considered a "call". */
2178 if (LABEL_REF_NONLOCAL_P (orig) && ! LABEL_REF_NONLOCAL_P (copy))
2179 function_call_count++;
2189 /* Symbols which represent the address of a label stored in the constant
2190 pool must be modified to point to a constant pool entry for the
2191 remapped label. Otherwise, symbols are returned unchanged. */
2192 if (CONSTANT_POOL_ADDRESS_P (orig))
2194 rtx constant = get_pool_constant (orig);
2195 if (GET_CODE (constant) == LABEL_REF)
2196 return XEXP (force_const_mem (Pmode,
2197 copy_rtx_and_substitute (constant,
2205 /* We have to make a new copy of this CONST_DOUBLE because don't want
2206 to use the old value of CONST_DOUBLE_MEM. Also, this may be a
2207 duplicate of a CONST_DOUBLE we have already seen. */
2208 if (GET_MODE_CLASS (GET_MODE (orig)) == MODE_FLOAT)
2212 REAL_VALUE_FROM_CONST_DOUBLE (d, orig);
2213 return CONST_DOUBLE_FROM_REAL_VALUE (d, GET_MODE (orig));
2216 return immed_double_const (CONST_DOUBLE_LOW (orig),
2217 CONST_DOUBLE_HIGH (orig), VOIDmode);
2220 /* Make new constant pool entry for a constant
2221 that was in the pool of the inline function. */
2222 if (RTX_INTEGRATED_P (orig))
2224 /* If this was an address of a constant pool entry that itself
2225 had to be placed in the constant pool, it might not be a
2226 valid address. So the recursive call below might turn it
2227 into a register. In that case, it isn't a constant any
2228 more, so return it. This has the potential of changing a
2229 MEM into a REG, but we'll assume that it safe. */
2230 temp = copy_rtx_and_substitute (XEXP (orig, 0), map);
2231 if (! CONSTANT_P (temp))
2233 return validize_mem (force_const_mem (GET_MODE (orig), temp));
2238 /* If from constant pool address, make new constant pool entry and
2239 return its address. */
2240 if (! RTX_INTEGRATED_P (orig))
2243 temp = force_const_mem (GET_MODE (orig),
2244 copy_rtx_and_substitute (XEXP (orig, 0), map));
2247 /* Legitimizing the address here is incorrect.
2249 The only ADDRESS rtx's that can reach here are ones created by
2250 save_constants. Hence the operand of the ADDRESS is always legal
2251 in this position of the instruction, since the original rtx without
2252 the ADDRESS was legal.
2254 The reason we don't legitimize the address here is that on the
2255 Sparc, the caller may have a (high ...) surrounding this ADDRESS.
2256 This code forces the operand of the address to a register, which
2257 fails because we can not take the HIGH part of a register.
2259 Also, change_address may create new registers. These registers
2260 will not have valid reg_map entries. This can cause try_constants()
2261 to fail because assumes that all registers in the rtx have valid
2262 reg_map entries, and it may end up replacing one of these new
2263 registers with junk. */
2265 if (! memory_address_p (GET_MODE (temp), XEXP (temp, 0)))
2266 temp = change_address (temp, GET_MODE (temp), XEXP (temp, 0));
2269 return XEXP (temp, 0);
2272 /* If a single asm insn contains multiple output operands
2273 then it contains multiple ASM_OPERANDS rtx's that share operand 3.
2274 We must make sure that the copied insn continues to share it. */
2275 if (map->orig_asm_operands_vector == XVEC (orig, 3))
2277 copy = rtx_alloc (ASM_OPERANDS);
2278 copy->volatil = orig->volatil;
2279 XSTR (copy, 0) = XSTR (orig, 0);
2280 XSTR (copy, 1) = XSTR (orig, 1);
2281 XINT (copy, 2) = XINT (orig, 2);
2282 XVEC (copy, 3) = map->copy_asm_operands_vector;
2283 XVEC (copy, 4) = map->copy_asm_constraints_vector;
2284 XSTR (copy, 5) = XSTR (orig, 5);
2285 XINT (copy, 6) = XINT (orig, 6);
2291 /* This is given special treatment because the first
2292 operand of a CALL is a (MEM ...) which may get
2293 forced into a register for cse. This is undesirable
2294 if function-address cse isn't wanted or if we won't do cse. */
2295 #ifndef NO_FUNCTION_CSE
2296 if (! (optimize && ! flag_no_function_cse))
2298 return gen_rtx (CALL, GET_MODE (orig),
2299 gen_rtx (MEM, GET_MODE (XEXP (orig, 0)),
2300 copy_rtx_and_substitute (XEXP (XEXP (orig, 0), 0), map)),
2301 copy_rtx_and_substitute (XEXP (orig, 1), map));
2305 /* Must be ifdefed out for loop unrolling to work. */
2311 /* If this is setting fp or ap, it means that we have a nonlocal goto.
2313 If the nonlocal goto is into the current function,
2314 this will result in unnecessarily bad code, but should work. */
2315 if (SET_DEST (orig) == virtual_stack_vars_rtx
2316 || SET_DEST (orig) == virtual_incoming_args_rtx)
2317 return gen_rtx (SET, VOIDmode, SET_DEST (orig),
2318 copy_rtx_and_substitute (SET_SRC (orig), map));
2322 copy = rtx_alloc (MEM);
2323 PUT_MODE (copy, mode);
2324 XEXP (copy, 0) = copy_rtx_and_substitute (XEXP (orig, 0), map);
2325 MEM_IN_STRUCT_P (copy) = MEM_IN_STRUCT_P (orig);
2326 MEM_VOLATILE_P (copy) = MEM_VOLATILE_P (orig);
2328 /* If doing function inlining, this MEM might not be const in the
2329 function that it is being inlined into, and thus may not be
2330 unchanging after function inlining. Constant pool references are
2331 handled elsewhere, so this doesn't lose RTX_UNCHANGING_P bits
2333 if (! map->integrating)
2334 RTX_UNCHANGING_P (copy) = RTX_UNCHANGING_P (orig);
2339 copy = rtx_alloc (code);
2340 PUT_MODE (copy, mode);
2341 copy->in_struct = orig->in_struct;
2342 copy->volatil = orig->volatil;
2343 copy->unchanging = orig->unchanging;
2345 format_ptr = GET_RTX_FORMAT (GET_CODE (copy));
2347 for (i = 0; i < GET_RTX_LENGTH (GET_CODE (copy)); i++)
2349 switch (*format_ptr++)
2355 XEXP (copy, i) = copy_rtx_and_substitute (XEXP (orig, i), map);
2359 /* Change any references to old-insns to point to the
2360 corresponding copied insns. */
2361 XEXP (copy, i) = map->insn_map[INSN_UID (XEXP (orig, i))];
2365 XVEC (copy, i) = XVEC (orig, i);
2366 if (XVEC (orig, i) != NULL && XVECLEN (orig, i) != 0)
2368 XVEC (copy, i) = rtvec_alloc (XVECLEN (orig, i));
2369 for (j = 0; j < XVECLEN (copy, i); j++)
2370 XVECEXP (copy, i, j)
2371 = copy_rtx_and_substitute (XVECEXP (orig, i, j), map);
2376 XWINT (copy, i) = XWINT (orig, i);
2380 XINT (copy, i) = XINT (orig, i);
2384 XSTR (copy, i) = XSTR (orig, i);
2392 if (code == ASM_OPERANDS && map->orig_asm_operands_vector == 0)
2394 map->orig_asm_operands_vector = XVEC (orig, 3);
2395 map->copy_asm_operands_vector = XVEC (copy, 3);
2396 map->copy_asm_constraints_vector = XVEC (copy, 4);
2402 /* Substitute known constant values into INSN, if that is valid. */
2405 try_constants (insn, map)
2407 struct inline_remap *map;
2412 subst_constants (&PATTERN (insn), insn, map);
2414 /* Apply the changes if they are valid; otherwise discard them. */
2415 apply_change_group ();
2417 /* Show we don't know the value of anything stored or clobbered. */
2418 note_stores (PATTERN (insn), mark_stores);
2419 map->last_pc_value = 0;
2421 map->last_cc0_value = 0;
2424 /* Set up any constant equivalences made in this insn. */
2425 for (i = 0; i < map->num_sets; i++)
2427 if (GET_CODE (map->equiv_sets[i].dest) == REG)
2429 int regno = REGNO (map->equiv_sets[i].dest);
2431 if (regno < map->const_equiv_map_size
2432 && (map->const_equiv_map[regno] == 0
2433 /* Following clause is a hack to make case work where GNU C++
2434 reassigns a variable to make cse work right. */
2435 || ! rtx_equal_p (map->const_equiv_map[regno],
2436 map->equiv_sets[i].equiv)))
2438 map->const_equiv_map[regno] = map->equiv_sets[i].equiv;
2439 map->const_age_map[regno] = map->const_age;
2442 else if (map->equiv_sets[i].dest == pc_rtx)
2443 map->last_pc_value = map->equiv_sets[i].equiv;
2445 else if (map->equiv_sets[i].dest == cc0_rtx)
2446 map->last_cc0_value = map->equiv_sets[i].equiv;
2451 /* Substitute known constants for pseudo regs in the contents of LOC,
2452 which are part of INSN.
2453 If INSN is zero, the substitution should always be done (this is used to
2455 These changes are taken out by try_constants if the result is not valid.
2457 Note that we are more concerned with determining when the result of a SET
2458 is a constant, for further propagation, than actually inserting constants
2459 into insns; cse will do the latter task better.
2461 This function is also used to adjust address of items previously addressed
2462 via the virtual stack variable or virtual incoming arguments registers. */
2465 subst_constants (loc, insn, map)
2468 struct inline_remap *map;
2472 register enum rtx_code code;
2473 register char *format_ptr;
2474 int num_changes = num_validated_changes ();
2476 enum machine_mode op0_mode;
2478 code = GET_CODE (x);
2493 validate_change (insn, loc, map->last_cc0_value, 1);
2499 /* The only thing we can do with a USE or CLOBBER is possibly do
2500 some substitutions in a MEM within it. */
2501 if (GET_CODE (XEXP (x, 0)) == MEM)
2502 subst_constants (&XEXP (XEXP (x, 0), 0), insn, map);
2506 /* Substitute for parms and known constants. Don't replace
2507 hard regs used as user variables with constants. */
2509 int regno = REGNO (x);
2511 if (! (regno < FIRST_PSEUDO_REGISTER && REG_USERVAR_P (x))
2512 && regno < map->const_equiv_map_size
2513 && map->const_equiv_map[regno] != 0
2514 && map->const_age_map[regno] >= map->const_age)
2515 validate_change (insn, loc, map->const_equiv_map[regno], 1);
2520 /* SUBREG applied to something other than a reg
2521 should be treated as ordinary, since that must
2522 be a special hack and we don't know how to treat it specially.
2523 Consider for example mulsidi3 in m68k.md.
2524 Ordinary SUBREG of a REG needs this special treatment. */
2525 if (GET_CODE (SUBREG_REG (x)) == REG)
2527 rtx inner = SUBREG_REG (x);
2530 /* We can't call subst_constants on &SUBREG_REG (x) because any
2531 constant or SUBREG wouldn't be valid inside our SUBEG. Instead,
2532 see what is inside, try to form the new SUBREG and see if that is
2533 valid. We handle two cases: extracting a full word in an
2534 integral mode and extracting the low part. */
2535 subst_constants (&inner, NULL_RTX, map);
2537 if (GET_MODE_CLASS (GET_MODE (x)) == MODE_INT
2538 && GET_MODE_SIZE (GET_MODE (x)) == UNITS_PER_WORD
2539 && GET_MODE (SUBREG_REG (x)) != VOIDmode)
2540 new = operand_subword (inner, SUBREG_WORD (x), 0,
2541 GET_MODE (SUBREG_REG (x)));
2543 if (new == 0 && subreg_lowpart_p (x))
2544 new = gen_lowpart_common (GET_MODE (x), inner);
2547 validate_change (insn, loc, new, 1);
2554 subst_constants (&XEXP (x, 0), insn, map);
2556 /* If a memory address got spoiled, change it back. */
2557 if (insn != 0 && num_validated_changes () != num_changes
2558 && !memory_address_p (GET_MODE (x), XEXP (x, 0)))
2559 cancel_changes (num_changes);
2564 /* Substitute constants in our source, and in any arguments to a
2565 complex (e..g, ZERO_EXTRACT) destination, but not in the destination
2567 rtx *dest_loc = &SET_DEST (x);
2568 rtx dest = *dest_loc;
2571 subst_constants (&SET_SRC (x), insn, map);
2574 while (GET_CODE (*dest_loc) == ZERO_EXTRACT
2575 /* By convention, we always use ZERO_EXTRACT in the dest. */
2576 /* || GET_CODE (*dest_loc) == SIGN_EXTRACT */
2577 || GET_CODE (*dest_loc) == SUBREG
2578 || GET_CODE (*dest_loc) == STRICT_LOW_PART)
2580 if (GET_CODE (*dest_loc) == ZERO_EXTRACT)
2582 subst_constants (&XEXP (*dest_loc, 1), insn, map);
2583 subst_constants (&XEXP (*dest_loc, 2), insn, map);
2585 dest_loc = &XEXP (*dest_loc, 0);
2588 /* Do substitute in the address of a destination in memory. */
2589 if (GET_CODE (*dest_loc) == MEM)
2590 subst_constants (&XEXP (*dest_loc, 0), insn, map);
2592 /* Check for the case of DEST a SUBREG, both it and the underlying
2593 register are less than one word, and the SUBREG has the wider mode.
2594 In the case, we are really setting the underlying register to the
2595 source converted to the mode of DEST. So indicate that. */
2596 if (GET_CODE (dest) == SUBREG
2597 && GET_MODE_SIZE (GET_MODE (dest)) <= UNITS_PER_WORD
2598 && GET_MODE_SIZE (GET_MODE (SUBREG_REG (dest))) <= UNITS_PER_WORD
2599 && (GET_MODE_SIZE (GET_MODE (SUBREG_REG (dest)))
2600 <= GET_MODE_SIZE (GET_MODE (dest)))
2601 && (tem = gen_lowpart_if_possible (GET_MODE (SUBREG_REG (dest)),
2603 src = tem, dest = SUBREG_REG (dest);
2605 /* If storing a recognizable value save it for later recording. */
2606 if ((map->num_sets < MAX_RECOG_OPERANDS)
2607 && (CONSTANT_P (src)
2608 || (GET_CODE (src) == REG
2609 && REGNO (src) >= FIRST_VIRTUAL_REGISTER
2610 && REGNO (src) <= LAST_VIRTUAL_REGISTER)
2611 || (GET_CODE (src) == PLUS
2612 && GET_CODE (XEXP (src, 0)) == REG
2613 && REGNO (XEXP (src, 0)) >= FIRST_VIRTUAL_REGISTER
2614 && REGNO (XEXP (src, 0)) <= LAST_VIRTUAL_REGISTER
2615 && CONSTANT_P (XEXP (src, 1)))
2616 || GET_CODE (src) == COMPARE
2621 && (src == pc_rtx || GET_CODE (src) == RETURN
2622 || GET_CODE (src) == LABEL_REF))))
2624 /* Normally, this copy won't do anything. But, if SRC is a COMPARE
2625 it will cause us to save the COMPARE with any constants
2626 substituted, which is what we want for later. */
2627 map->equiv_sets[map->num_sets].equiv = copy_rtx (src);
2628 map->equiv_sets[map->num_sets++].dest = dest;
2635 format_ptr = GET_RTX_FORMAT (code);
2637 /* If the first operand is an expression, save its mode for later. */
2638 if (*format_ptr == 'e')
2639 op0_mode = GET_MODE (XEXP (x, 0));
2641 for (i = 0; i < GET_RTX_LENGTH (code); i++)
2643 switch (*format_ptr++)
2650 subst_constants (&XEXP (x, i), insn, map);
2660 if (XVEC (x, i) != NULL && XVECLEN (x, i) != 0)
2663 for (j = 0; j < XVECLEN (x, i); j++)
2664 subst_constants (&XVECEXP (x, i, j), insn, map);
2673 /* If this is a commutative operation, move a constant to the second
2674 operand unless the second operand is already a CONST_INT. */
2675 if ((GET_RTX_CLASS (code) == 'c' || code == NE || code == EQ)
2676 && CONSTANT_P (XEXP (x, 0)) && GET_CODE (XEXP (x, 1)) != CONST_INT)
2678 rtx tem = XEXP (x, 0);
2679 validate_change (insn, &XEXP (x, 0), XEXP (x, 1), 1);
2680 validate_change (insn, &XEXP (x, 1), tem, 1);
2683 /* Simplify the expression in case we put in some constants. */
2684 switch (GET_RTX_CLASS (code))
2687 new = simplify_unary_operation (code, GET_MODE (x),
2688 XEXP (x, 0), op0_mode);
2693 enum machine_mode op_mode = GET_MODE (XEXP (x, 0));
2694 if (op_mode == VOIDmode)
2695 op_mode = GET_MODE (XEXP (x, 1));
2696 new = simplify_relational_operation (code, op_mode,
2697 XEXP (x, 0), XEXP (x, 1));
2698 #ifdef FLOAT_STORE_FLAG_VALUE
2699 if (new != 0 && GET_MODE_CLASS (GET_MODE (x)) == MODE_FLOAT)
2700 new = ((new == const0_rtx) ? CONST0_RTX (GET_MODE (x))
2701 : CONST_DOUBLE_FROM_REAL_VALUE (FLOAT_STORE_FLAG_VALUE,
2709 new = simplify_binary_operation (code, GET_MODE (x),
2710 XEXP (x, 0), XEXP (x, 1));
2715 new = simplify_ternary_operation (code, GET_MODE (x), op0_mode,
2716 XEXP (x, 0), XEXP (x, 1), XEXP (x, 2));
2721 validate_change (insn, loc, new, 1);
2724 /* Show that register modified no longer contain known constants. We are
2725 called from note_stores with parts of the new insn. */
2728 mark_stores (dest, x)
2733 enum machine_mode mode;
2735 /* DEST is always the innermost thing set, except in the case of
2736 SUBREGs of hard registers. */
2738 if (GET_CODE (dest) == REG)
2739 regno = REGNO (dest), mode = GET_MODE (dest);
2740 else if (GET_CODE (dest) == SUBREG && GET_CODE (SUBREG_REG (dest)) == REG)
2742 regno = REGNO (SUBREG_REG (dest)) + SUBREG_WORD (dest);
2743 mode = GET_MODE (SUBREG_REG (dest));
2748 int last_reg = (regno >= FIRST_PSEUDO_REGISTER ? regno
2749 : regno + HARD_REGNO_NREGS (regno, mode) - 1);
2752 for (i = regno; i <= last_reg; i++)
2753 if (i < global_const_equiv_map_size)
2754 global_const_equiv_map[i] = 0;
2758 /* If any CONST expressions with RTX_INTEGRATED_P are present in the rtx
2759 pointed to by PX, they represent constants in the constant pool.
2760 Replace these with a new memory reference obtained from force_const_mem.
2761 Similarly, ADDRESS expressions with RTX_INTEGRATED_P represent the
2762 address of a constant pool entry. Replace them with the address of
2763 a new constant pool entry obtained from force_const_mem. */
2766 restore_constants (px)
2776 if (GET_CODE (x) == CONST_DOUBLE)
2778 /* We have to make a new CONST_DOUBLE to ensure that we account for
2779 it correctly. Using the old CONST_DOUBLE_MEM data is wrong. */
2780 if (GET_MODE_CLASS (GET_MODE (x)) == MODE_FLOAT)
2784 REAL_VALUE_FROM_CONST_DOUBLE (d, x);
2785 *px = CONST_DOUBLE_FROM_REAL_VALUE (d, GET_MODE (x));
2788 *px = immed_double_const (CONST_DOUBLE_LOW (x), CONST_DOUBLE_HIGH (x),
2792 else if (RTX_INTEGRATED_P (x) && GET_CODE (x) == CONST)
2794 restore_constants (&XEXP (x, 0));
2795 *px = validize_mem (force_const_mem (GET_MODE (x), XEXP (x, 0)));
2797 else if (RTX_INTEGRATED_P (x) && GET_CODE (x) == SUBREG)
2799 /* This must be (subreg/i:M1 (const/i:M2 ...) 0). */
2800 rtx new = XEXP (SUBREG_REG (x), 0);
2802 restore_constants (&new);
2803 new = force_const_mem (GET_MODE (SUBREG_REG (x)), new);
2804 PUT_MODE (new, GET_MODE (x));
2805 *px = validize_mem (new);
2807 else if (RTX_INTEGRATED_P (x) && GET_CODE (x) == ADDRESS)
2809 restore_constants (&XEXP (x, 0));
2810 *px = XEXP (force_const_mem (GET_MODE (x), XEXP (x, 0)), 0);
2814 fmt = GET_RTX_FORMAT (GET_CODE (x));
2815 for (i = 0; i < GET_RTX_LENGTH (GET_CODE (x)); i++)
2820 for (j = 0; j < XVECLEN (x, i); j++)
2821 restore_constants (&XVECEXP (x, i, j));
2825 restore_constants (&XEXP (x, i));
2832 /* Given a pointer to some BLOCK node, if the BLOCK_ABSTRACT_ORIGIN for the
2833 given BLOCK node is NULL, set the BLOCK_ABSTRACT_ORIGIN for the node so
2834 that it points to the node itself, thus indicating that the node is its
2835 own (abstract) origin. Additionally, if the BLOCK_ABSTRACT_ORIGIN for
2836 the given node is NULL, recursively descend the decl/block tree which
2837 it is the root of, and for each other ..._DECL or BLOCK node contained
2838 therein whose DECL_ABSTRACT_ORIGINs or BLOCK_ABSTRACT_ORIGINs are also
2839 still NULL, set *their* DECL_ABSTRACT_ORIGIN or BLOCK_ABSTRACT_ORIGIN
2840 values to point to themselves. */
2843 set_block_origin_self (stmt)
2846 if (BLOCK_ABSTRACT_ORIGIN (stmt) == NULL_TREE)
2848 BLOCK_ABSTRACT_ORIGIN (stmt) = stmt;
2851 register tree local_decl;
2853 for (local_decl = BLOCK_VARS (stmt);
2854 local_decl != NULL_TREE;
2855 local_decl = TREE_CHAIN (local_decl))
2856 set_decl_origin_self (local_decl); /* Potential recursion. */
2860 register tree subblock;
2862 for (subblock = BLOCK_SUBBLOCKS (stmt);
2863 subblock != NULL_TREE;
2864 subblock = BLOCK_CHAIN (subblock))
2865 set_block_origin_self (subblock); /* Recurse. */
2870 /* Given a pointer to some ..._DECL node, if the DECL_ABSTRACT_ORIGIN for
2871 the given ..._DECL node is NULL, set the DECL_ABSTRACT_ORIGIN for the
2872 node to so that it points to the node itself, thus indicating that the
2873 node represents its own (abstract) origin. Additionally, if the
2874 DECL_ABSTRACT_ORIGIN for the given node is NULL, recursively descend
2875 the decl/block tree of which the given node is the root of, and for
2876 each other ..._DECL or BLOCK node contained therein whose
2877 DECL_ABSTRACT_ORIGINs or BLOCK_ABSTRACT_ORIGINs are also still NULL,
2878 set *their* DECL_ABSTRACT_ORIGIN or BLOCK_ABSTRACT_ORIGIN values to
2879 point to themselves. */
2882 set_decl_origin_self (decl)
2885 if (DECL_ABSTRACT_ORIGIN (decl) == NULL_TREE)
2887 DECL_ABSTRACT_ORIGIN (decl) = decl;
2888 if (TREE_CODE (decl) == FUNCTION_DECL)
2892 for (arg = DECL_ARGUMENTS (decl); arg; arg = TREE_CHAIN (arg))
2893 DECL_ABSTRACT_ORIGIN (arg) = arg;
2894 if (DECL_INITIAL (decl) != NULL_TREE)
2895 set_block_origin_self (DECL_INITIAL (decl));
2900 /* Given a pointer to some BLOCK node, and a boolean value to set the
2901 "abstract" flags to, set that value into the BLOCK_ABSTRACT flag for
2902 the given block, and for all local decls and all local sub-blocks
2903 (recursively) which are contained therein. */
2906 set_block_abstract_flags (stmt, setting)
2908 register int setting;
2910 BLOCK_ABSTRACT (stmt) = setting;
2913 register tree local_decl;
2915 for (local_decl = BLOCK_VARS (stmt);
2916 local_decl != NULL_TREE;
2917 local_decl = TREE_CHAIN (local_decl))
2918 set_decl_abstract_flags (local_decl, setting);
2922 register tree subblock;
2924 for (subblock = BLOCK_SUBBLOCKS (stmt);
2925 subblock != NULL_TREE;
2926 subblock = BLOCK_CHAIN (subblock))
2927 set_block_abstract_flags (subblock, setting);
2931 /* Given a pointer to some ..._DECL node, and a boolean value to set the
2932 "abstract" flags to, set that value into the DECL_ABSTRACT flag for the
2933 given decl, and (in the case where the decl is a FUNCTION_DECL) also
2934 set the abstract flags for all of the parameters, local vars, local
2935 blocks and sub-blocks (recursively) to the same setting. */
2938 set_decl_abstract_flags (decl, setting)
2940 register int setting;
2942 DECL_ABSTRACT (decl) = setting;
2943 if (TREE_CODE (decl) == FUNCTION_DECL)
2947 for (arg = DECL_ARGUMENTS (decl); arg; arg = TREE_CHAIN (arg))
2948 DECL_ABSTRACT (arg) = setting;
2949 if (DECL_INITIAL (decl) != NULL_TREE)
2950 set_block_abstract_flags (DECL_INITIAL (decl), setting);
2954 /* Output the assembly language code for the function FNDECL
2955 from its DECL_SAVED_INSNS. Used for inline functions that are output
2956 at end of compilation instead of where they came in the source. */
2959 output_inline_function (fndecl)
2965 if (output_bytecode)
2967 warning ("`inline' ignored for bytecode output");
2971 head = DECL_SAVED_INSNS (fndecl);
2972 current_function_decl = fndecl;
2974 /* This call is only used to initialize global variables. */
2975 init_function_start (fndecl, "lossage", 1);
2977 /* Redo parameter determinations in case the FUNCTION_...
2978 macros took machine-specific actions that need to be redone. */
2979 assign_parms (fndecl, 1);
2981 /* Set stack frame size. */
2982 assign_stack_local (BLKmode, DECL_FRAME_SIZE (fndecl), 0);
2984 restore_reg_data (FIRST_PARM_INSN (head));
2986 stack_slot_list = STACK_SLOT_LIST (head);
2988 if (FUNCTION_FLAGS (head) & FUNCTION_FLAGS_CALLS_ALLOCA)
2989 current_function_calls_alloca = 1;
2991 if (FUNCTION_FLAGS (head) & FUNCTION_FLAGS_CALLS_SETJMP)
2992 current_function_calls_setjmp = 1;
2994 if (FUNCTION_FLAGS (head) & FUNCTION_FLAGS_CALLS_LONGJMP)
2995 current_function_calls_longjmp = 1;
2997 if (FUNCTION_FLAGS (head) & FUNCTION_FLAGS_RETURNS_STRUCT)
2998 current_function_returns_struct = 1;
3000 if (FUNCTION_FLAGS (head) & FUNCTION_FLAGS_RETURNS_PCC_STRUCT)
3001 current_function_returns_pcc_struct = 1;
3003 if (FUNCTION_FLAGS (head) & FUNCTION_FLAGS_NEEDS_CONTEXT)
3004 current_function_needs_context = 1;
3006 if (FUNCTION_FLAGS (head) & FUNCTION_FLAGS_HAS_NONLOCAL_LABEL)
3007 current_function_has_nonlocal_label = 1;
3009 if (FUNCTION_FLAGS (head) & FUNCTION_FLAGS_RETURNS_POINTER)
3010 current_function_returns_pointer = 1;
3012 if (FUNCTION_FLAGS (head) & FUNCTION_FLAGS_USES_CONST_POOL)
3013 current_function_uses_const_pool = 1;
3015 if (FUNCTION_FLAGS (head) & FUNCTION_FLAGS_USES_PIC_OFFSET_TABLE)
3016 current_function_uses_pic_offset_table = 1;
3018 current_function_outgoing_args_size = OUTGOING_ARGS_SIZE (head);
3019 current_function_pops_args = POPS_ARGS (head);
3021 /* There is no need to output a return label again. */
3024 expand_function_end (DECL_SOURCE_FILE (fndecl), DECL_SOURCE_LINE (fndecl), 0);
3026 /* Find last insn and rebuild the constant pool. */
3027 for (last = FIRST_PARM_INSN (head);
3028 NEXT_INSN (last); last = NEXT_INSN (last))
3030 if (GET_RTX_CLASS (GET_CODE (last)) == 'i')
3032 restore_constants (&PATTERN (last));
3033 restore_constants (®_NOTES (last));
3037 set_new_first_and_last_insn (FIRST_PARM_INSN (head), last);
3038 set_new_first_and_last_label_num (FIRST_LABELNO (head), LAST_LABELNO (head));
3040 /* We must have already output DWARF debugging information for the
3041 original (abstract) inline function declaration/definition, so
3042 we want to make sure that the debugging information we generate
3043 for this special instance of the inline function refers back to
3044 the information we already generated. To make sure that happens,
3045 we simply have to set the DECL_ABSTRACT_ORIGIN for the function
3046 node (and for all of the local ..._DECL nodes which are its children)
3047 so that they all point to themselves. */
3049 set_decl_origin_self (fndecl);
3051 /* We're not deferring this any longer. */
3052 DECL_DEFER_OUTPUT (fndecl) = 0;
3054 /* Compile this function all the way down to assembly code. */
3055 rest_of_compilation (fndecl);
3057 current_function_decl = 0;