1 /* Expand builtin functions.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001 Free Software Foundation, Inc.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
30 #include "hard-reg-set.h"
33 #include "insn-config.h"
39 #include "typeclass.h"
45 #define CALLED_AS_BUILT_IN(NODE) \
46 (!strncmp (IDENTIFIER_POINTER (DECL_NAME (NODE)), "__builtin_", 10))
48 /* Register mappings for target machines without register windows. */
49 #ifndef INCOMING_REGNO
50 #define INCOMING_REGNO(OUT) (OUT)
52 #ifndef OUTGOING_REGNO
53 #define OUTGOING_REGNO(IN) (IN)
56 #ifndef PAD_VARARGS_DOWN
57 #define PAD_VARARGS_DOWN BYTES_BIG_ENDIAN
60 /* Define the names of the builtin function types and codes. */
61 const char *const built_in_class_names[4]
62 = {"NOT_BUILT_IN", "BUILT_IN_FRONTEND", "BUILT_IN_MD", "BUILT_IN_NORMAL"};
64 #define DEF_BUILTIN(X, N, C, T, LT, B, F, NA) STRINGX(X),
65 const char *const built_in_names[(int) END_BUILTINS] =
67 #include "builtins.def"
71 /* Setup an array of _DECL trees, make sure each element is
72 initialized to NULL_TREE. */
73 tree built_in_decls[(int) END_BUILTINS];
75 tree (*lang_type_promotes_to) PARAMS ((tree));
77 static int get_pointer_alignment PARAMS ((tree, unsigned int));
78 static tree c_strlen PARAMS ((tree));
79 static const char *c_getstr PARAMS ((tree));
80 static rtx c_readstr PARAMS ((const char *,
82 static int target_char_cast PARAMS ((tree, char *));
83 static rtx get_memory_rtx PARAMS ((tree));
84 static int apply_args_size PARAMS ((void));
85 static int apply_result_size PARAMS ((void));
86 #if defined (HAVE_untyped_call) || defined (HAVE_untyped_return)
87 static rtx result_vector PARAMS ((int, rtx));
89 static rtx expand_builtin_setjmp PARAMS ((tree, rtx));
90 static rtx expand_builtin_apply_args PARAMS ((void));
91 static rtx expand_builtin_apply_args_1 PARAMS ((void));
92 static rtx expand_builtin_apply PARAMS ((rtx, rtx, rtx));
93 static void expand_builtin_return PARAMS ((rtx));
94 static enum type_class type_to_class PARAMS ((tree));
95 static rtx expand_builtin_classify_type PARAMS ((tree));
96 static rtx expand_builtin_mathfn PARAMS ((tree, rtx, rtx));
97 static rtx expand_builtin_constant_p PARAMS ((tree));
98 static rtx expand_builtin_args_info PARAMS ((tree));
99 static rtx expand_builtin_next_arg PARAMS ((tree));
100 static rtx expand_builtin_va_start PARAMS ((int, tree));
101 static rtx expand_builtin_va_end PARAMS ((tree));
102 static rtx expand_builtin_va_copy PARAMS ((tree));
104 static rtx expand_builtin_memcmp PARAMS ((tree, tree, rtx));
106 static rtx expand_builtin_strcmp PARAMS ((tree, rtx,
108 static rtx expand_builtin_strncmp PARAMS ((tree, rtx,
110 static rtx builtin_memcpy_read_str PARAMS ((PTR, HOST_WIDE_INT,
112 static rtx expand_builtin_strcat PARAMS ((tree, rtx,
114 static rtx expand_builtin_strncat PARAMS ((tree, rtx,
116 static rtx expand_builtin_strspn PARAMS ((tree, rtx,
118 static rtx expand_builtin_strcspn PARAMS ((tree, rtx,
120 static rtx expand_builtin_memcpy PARAMS ((tree));
121 static rtx expand_builtin_strcpy PARAMS ((tree));
122 static rtx builtin_strncpy_read_str PARAMS ((PTR, HOST_WIDE_INT,
124 static rtx expand_builtin_strncpy PARAMS ((tree, rtx,
126 static rtx builtin_memset_read_str PARAMS ((PTR, HOST_WIDE_INT,
128 static rtx expand_builtin_memset PARAMS ((tree));
129 static rtx expand_builtin_bzero PARAMS ((tree));
130 static rtx expand_builtin_strlen PARAMS ((tree, rtx));
131 static rtx expand_builtin_strstr PARAMS ((tree, rtx,
133 static rtx expand_builtin_strpbrk PARAMS ((tree, rtx,
135 static rtx expand_builtin_strchr PARAMS ((tree, rtx,
137 static rtx expand_builtin_strrchr PARAMS ((tree, rtx,
139 static rtx expand_builtin_alloca PARAMS ((tree, rtx));
140 static rtx expand_builtin_ffs PARAMS ((tree, rtx, rtx));
141 static rtx expand_builtin_frame_address PARAMS ((tree));
142 static rtx expand_builtin_fputs PARAMS ((tree, int));
143 static tree stabilize_va_list PARAMS ((tree, int));
144 static rtx expand_builtin_expect PARAMS ((tree, rtx));
145 static tree fold_builtin_constant_p PARAMS ((tree));
146 static tree fold_builtin_classify_type PARAMS ((tree));
147 static tree build_function_call_expr PARAMS ((tree, tree));
148 static int validate_arglist PARAMS ((tree, ...));
150 /* Return the alignment in bits of EXP, a pointer valued expression.
151 But don't return more than MAX_ALIGN no matter what.
152 The alignment returned is, by default, the alignment of the thing that
153 EXP points to. If it is not a POINTER_TYPE, 0 is returned.
155 Otherwise, look at the expression to see if we can do better, i.e., if the
156 expression is actually pointing at an object whose alignment is tighter. */
159 get_pointer_alignment (exp, max_align)
161 unsigned int max_align;
163 unsigned int align, inner;
165 if (TREE_CODE (TREE_TYPE (exp)) != POINTER_TYPE)
168 align = TYPE_ALIGN (TREE_TYPE (TREE_TYPE (exp)));
169 align = MIN (align, max_align);
173 switch (TREE_CODE (exp))
177 case NON_LVALUE_EXPR:
178 exp = TREE_OPERAND (exp, 0);
179 if (TREE_CODE (TREE_TYPE (exp)) != POINTER_TYPE)
182 inner = TYPE_ALIGN (TREE_TYPE (TREE_TYPE (exp)));
183 align = MIN (inner, max_align);
187 /* If sum of pointer + int, restrict our maximum alignment to that
188 imposed by the integer. If not, we can't do any better than
190 if (! host_integerp (TREE_OPERAND (exp, 1), 1))
193 while (((tree_low_cst (TREE_OPERAND (exp, 1), 1))
194 & (max_align / BITS_PER_UNIT - 1))
198 exp = TREE_OPERAND (exp, 0);
202 /* See what we are pointing at and look at its alignment. */
203 exp = TREE_OPERAND (exp, 0);
204 if (TREE_CODE (exp) == FUNCTION_DECL)
205 align = FUNCTION_BOUNDARY;
206 else if (DECL_P (exp))
207 align = DECL_ALIGN (exp);
208 #ifdef CONSTANT_ALIGNMENT
209 else if (TREE_CODE_CLASS (TREE_CODE (exp)) == 'c')
210 align = CONSTANT_ALIGNMENT (exp, align);
212 return MIN (align, max_align);
220 /* Compute the length of a C string. TREE_STRING_LENGTH is not the right
221 way, because it could contain a zero byte in the middle.
222 TREE_STRING_LENGTH is the size of the character array, not the string.
224 The value returned is of type `ssizetype'.
226 Unfortunately, string_constant can't access the values of const char
227 arrays with initializers, so neither can we do so here. */
234 HOST_WIDE_INT offset;
238 src = string_constant (src, &offset_node);
242 max = TREE_STRING_LENGTH (src) - 1;
243 ptr = TREE_STRING_POINTER (src);
245 if (offset_node && TREE_CODE (offset_node) != INTEGER_CST)
247 /* If the string has an internal zero byte (e.g., "foo\0bar"), we can't
248 compute the offset to the following null if we don't know where to
249 start searching for it. */
252 for (i = 0; i < max; i++)
256 /* We don't know the starting offset, but we do know that the string
257 has no internal zero bytes. We can assume that the offset falls
258 within the bounds of the string; otherwise, the programmer deserves
259 what he gets. Subtract the offset from the length of the string,
260 and return that. This would perhaps not be valid if we were dealing
261 with named arrays in addition to literal string constants. */
263 return size_diffop (size_int (max), offset_node);
266 /* We have a known offset into the string. Start searching there for
267 a null character if we can represent it as a single HOST_WIDE_INT. */
268 if (offset_node == 0)
270 else if (! host_integerp (offset_node, 0))
273 offset = tree_low_cst (offset_node, 0);
275 /* If the offset is known to be out of bounds, warn, and call strlen at
277 if (offset < 0 || offset > max)
279 warning ("offset outside bounds of constant string");
283 /* Use strlen to search for the first zero byte. Since any strings
284 constructed with build_string will have nulls appended, we win even
285 if we get handed something like (char[4])"abcd".
287 Since OFFSET is our starting index into the string, no further
288 calculation is needed. */
289 return ssize_int (strlen (ptr + offset));
292 /* Return a char pointer for a C string if it is a string constant
293 or sum of string constant and integer constant. */
301 src = string_constant (src, &offset_node);
305 if (offset_node == 0)
306 return TREE_STRING_POINTER (src);
307 else if (!host_integerp (offset_node, 1)
308 || compare_tree_int (offset_node, TREE_STRING_LENGTH (src) - 1) > 0)
311 return TREE_STRING_POINTER (src) + tree_low_cst (offset_node, 1);
314 /* Return a CONST_INT or CONST_DOUBLE corresponding to target reading
315 GET_MODE_BITSIZE (MODE) bits from string constant STR. */
318 c_readstr (str, mode)
320 enum machine_mode mode;
326 if (GET_MODE_CLASS (mode) != MODE_INT)
331 for (i = 0; i < GET_MODE_SIZE (mode); i++)
334 if (WORDS_BIG_ENDIAN)
335 j = GET_MODE_SIZE (mode) - i - 1;
336 if (BYTES_BIG_ENDIAN != WORDS_BIG_ENDIAN
337 && GET_MODE_SIZE (mode) > UNITS_PER_WORD)
338 j = j + UNITS_PER_WORD - 2 * (j % UNITS_PER_WORD) - 1;
340 if (j > 2 * HOST_BITS_PER_WIDE_INT)
343 ch = (unsigned char) str[i];
344 c[j / HOST_BITS_PER_WIDE_INT] |= ch << (j % HOST_BITS_PER_WIDE_INT);
346 return immed_double_const (c[0], c[1], mode);
349 /* Cast a target constant CST to target CHAR and if that value fits into
350 host char type, return zero and put that value into variable pointed by
354 target_char_cast (cst, p)
358 unsigned HOST_WIDE_INT val, hostval;
360 if (!host_integerp (cst, 1)
361 || CHAR_TYPE_SIZE > HOST_BITS_PER_WIDE_INT)
364 val = tree_low_cst (cst, 1);
365 if (CHAR_TYPE_SIZE < HOST_BITS_PER_WIDE_INT)
366 val &= (((unsigned HOST_WIDE_INT) 1) << CHAR_TYPE_SIZE) - 1;
369 if (HOST_BITS_PER_CHAR < HOST_BITS_PER_WIDE_INT)
370 hostval &= (((unsigned HOST_WIDE_INT) 1) << HOST_BITS_PER_CHAR) - 1;
379 /* Given TEM, a pointer to a stack frame, follow the dynamic chain COUNT
380 times to get the address of either a higher stack frame, or a return
381 address located within it (depending on FNDECL_CODE). */
384 expand_builtin_return_addr (fndecl_code, count, tem)
385 enum built_in_function fndecl_code;
391 /* Some machines need special handling before we can access
392 arbitrary frames. For example, on the sparc, we must first flush
393 all register windows to the stack. */
394 #ifdef SETUP_FRAME_ADDRESSES
396 SETUP_FRAME_ADDRESSES ();
399 /* On the sparc, the return address is not in the frame, it is in a
400 register. There is no way to access it off of the current frame
401 pointer, but it can be accessed off the previous frame pointer by
402 reading the value from the register window save area. */
403 #ifdef RETURN_ADDR_IN_PREVIOUS_FRAME
404 if (fndecl_code == BUILT_IN_RETURN_ADDRESS)
408 /* Scan back COUNT frames to the specified frame. */
409 for (i = 0; i < count; i++)
411 /* Assume the dynamic chain pointer is in the word that the
412 frame address points to, unless otherwise specified. */
413 #ifdef DYNAMIC_CHAIN_ADDRESS
414 tem = DYNAMIC_CHAIN_ADDRESS (tem);
416 tem = memory_address (Pmode, tem);
417 tem = gen_rtx_MEM (Pmode, tem);
418 set_mem_alias_set (tem, get_frame_alias_set ());
419 tem = copy_to_reg (tem);
422 /* For __builtin_frame_address, return what we've got. */
423 if (fndecl_code == BUILT_IN_FRAME_ADDRESS)
426 /* For __builtin_return_address, Get the return address from that
428 #ifdef RETURN_ADDR_RTX
429 tem = RETURN_ADDR_RTX (count, tem);
431 tem = memory_address (Pmode,
432 plus_constant (tem, GET_MODE_SIZE (Pmode)));
433 tem = gen_rtx_MEM (Pmode, tem);
434 set_mem_alias_set (tem, get_frame_alias_set ());
439 /* Alias set used for setjmp buffer. */
440 static HOST_WIDE_INT setjmp_alias_set = -1;
442 /* Construct the leading half of a __builtin_setjmp call. Control will
443 return to RECEIVER_LABEL. This is used directly by sjlj exception
447 expand_builtin_setjmp_setup (buf_addr, receiver_label)
451 enum machine_mode sa_mode = STACK_SAVEAREA_MODE (SAVE_NONLOCAL);
455 if (setjmp_alias_set == -1)
456 setjmp_alias_set = new_alias_set ();
458 #ifdef POINTERS_EXTEND_UNSIGNED
459 if (GET_MODE (buf_addr) != Pmode)
460 buf_addr = convert_memory_address (Pmode, buf_addr);
463 buf_addr = force_reg (Pmode, force_operand (buf_addr, NULL_RTX));
467 /* We store the frame pointer and the address of receiver_label in
468 the buffer and use the rest of it for the stack save area, which
469 is machine-dependent. */
471 #ifndef BUILTIN_SETJMP_FRAME_VALUE
472 #define BUILTIN_SETJMP_FRAME_VALUE virtual_stack_vars_rtx
475 mem = gen_rtx_MEM (Pmode, buf_addr);
476 set_mem_alias_set (mem, setjmp_alias_set);
477 emit_move_insn (mem, BUILTIN_SETJMP_FRAME_VALUE);
479 mem = gen_rtx_MEM (Pmode, plus_constant (buf_addr, GET_MODE_SIZE (Pmode))),
480 set_mem_alias_set (mem, setjmp_alias_set);
482 emit_move_insn (validize_mem (mem),
483 force_reg (Pmode, gen_rtx_LABEL_REF (Pmode, receiver_label)));
485 stack_save = gen_rtx_MEM (sa_mode,
486 plus_constant (buf_addr,
487 2 * GET_MODE_SIZE (Pmode)));
488 set_mem_alias_set (stack_save, setjmp_alias_set);
489 emit_stack_save (SAVE_NONLOCAL, &stack_save, NULL_RTX);
491 /* If there is further processing to do, do it. */
492 #ifdef HAVE_builtin_setjmp_setup
493 if (HAVE_builtin_setjmp_setup)
494 emit_insn (gen_builtin_setjmp_setup (buf_addr));
497 /* Tell optimize_save_area_alloca that extra work is going to
498 need to go on during alloca. */
499 current_function_calls_setjmp = 1;
501 /* Set this so all the registers get saved in our frame; we need to be
502 able to copy the saved values for any registers from frames we unwind. */
503 current_function_has_nonlocal_label = 1;
506 /* Construct the trailing part of a __builtin_setjmp call.
507 This is used directly by sjlj exception handling code. */
510 expand_builtin_setjmp_receiver (receiver_label)
511 rtx receiver_label ATTRIBUTE_UNUSED;
513 /* Clobber the FP when we get here, so we have to make sure it's
514 marked as used by this function. */
515 emit_insn (gen_rtx_USE (VOIDmode, hard_frame_pointer_rtx));
517 /* Mark the static chain as clobbered here so life information
518 doesn't get messed up for it. */
519 emit_insn (gen_rtx_CLOBBER (VOIDmode, static_chain_rtx));
521 /* Now put in the code to restore the frame pointer, and argument
522 pointer, if needed. The code below is from expand_end_bindings
523 in stmt.c; see detailed documentation there. */
524 #ifdef HAVE_nonlocal_goto
525 if (! HAVE_nonlocal_goto)
527 emit_move_insn (virtual_stack_vars_rtx, hard_frame_pointer_rtx);
529 #if ARG_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
530 if (fixed_regs[ARG_POINTER_REGNUM])
532 #ifdef ELIMINABLE_REGS
534 static const struct elims {const int from, to;} elim_regs[] = ELIMINABLE_REGS;
536 for (i = 0; i < ARRAY_SIZE (elim_regs); i++)
537 if (elim_regs[i].from == ARG_POINTER_REGNUM
538 && elim_regs[i].to == HARD_FRAME_POINTER_REGNUM)
541 if (i == ARRAY_SIZE (elim_regs))
544 /* Now restore our arg pointer from the address at which it
545 was saved in our stack frame. */
546 emit_move_insn (virtual_incoming_args_rtx,
547 copy_to_reg (get_arg_pointer_save_area (cfun)));
552 #ifdef HAVE_builtin_setjmp_receiver
553 if (HAVE_builtin_setjmp_receiver)
554 emit_insn (gen_builtin_setjmp_receiver (receiver_label));
557 #ifdef HAVE_nonlocal_goto_receiver
558 if (HAVE_nonlocal_goto_receiver)
559 emit_insn (gen_nonlocal_goto_receiver ());
564 /* @@@ This is a kludge. Not all machine descriptions define a blockage
565 insn, but we must not allow the code we just generated to be reordered
566 by scheduling. Specifically, the update of the frame pointer must
567 happen immediately, not later. So emit an ASM_INPUT to act as blockage
569 emit_insn (gen_rtx_ASM_INPUT (VOIDmode, ""));
572 /* __builtin_setjmp is passed a pointer to an array of five words (not
573 all will be used on all machines). It operates similarly to the C
574 library function of the same name, but is more efficient. Much of
575 the code below (and for longjmp) is copied from the handling of
578 NOTE: This is intended for use by GNAT and the exception handling
579 scheme in the compiler and will only work in the method used by
583 expand_builtin_setjmp (arglist, target)
587 rtx buf_addr, next_lab, cont_lab;
589 if (!validate_arglist (arglist, POINTER_TYPE, VOID_TYPE))
592 if (target == 0 || GET_CODE (target) != REG
593 || REGNO (target) < FIRST_PSEUDO_REGISTER)
594 target = gen_reg_rtx (TYPE_MODE (integer_type_node));
596 buf_addr = expand_expr (TREE_VALUE (arglist), NULL_RTX, VOIDmode, 0);
598 next_lab = gen_label_rtx ();
599 cont_lab = gen_label_rtx ();
601 expand_builtin_setjmp_setup (buf_addr, next_lab);
603 /* Set TARGET to zero and branch to the continue label. */
604 emit_move_insn (target, const0_rtx);
605 emit_jump_insn (gen_jump (cont_lab));
607 emit_label (next_lab);
609 expand_builtin_setjmp_receiver (next_lab);
611 /* Set TARGET to one. */
612 emit_move_insn (target, const1_rtx);
613 emit_label (cont_lab);
615 /* Tell flow about the strange goings on. Putting `next_lab' on
616 `nonlocal_goto_handler_labels' to indicates that function
617 calls may traverse the arc back to this label. */
619 current_function_has_nonlocal_label = 1;
620 nonlocal_goto_handler_labels
621 = gen_rtx_EXPR_LIST (VOIDmode, next_lab, nonlocal_goto_handler_labels);
626 /* __builtin_longjmp is passed a pointer to an array of five words (not
627 all will be used on all machines). It operates similarly to the C
628 library function of the same name, but is more efficient. Much of
629 the code below is copied from the handling of non-local gotos.
631 NOTE: This is intended for use by GNAT and the exception handling
632 scheme in the compiler and will only work in the method used by
636 expand_builtin_longjmp (buf_addr, value)
639 rtx fp, lab, stack, insn;
640 enum machine_mode sa_mode = STACK_SAVEAREA_MODE (SAVE_NONLOCAL);
642 if (setjmp_alias_set == -1)
643 setjmp_alias_set = new_alias_set ();
645 #ifdef POINTERS_EXTEND_UNSIGNED
646 if (GET_MODE (buf_addr) != Pmode)
647 buf_addr = convert_memory_address (Pmode, buf_addr);
650 buf_addr = force_reg (Pmode, buf_addr);
652 /* We used to store value in static_chain_rtx, but that fails if pointers
653 are smaller than integers. We instead require that the user must pass
654 a second argument of 1, because that is what builtin_setjmp will
655 return. This also makes EH slightly more efficient, since we are no
656 longer copying around a value that we don't care about. */
657 if (value != const1_rtx)
660 current_function_calls_longjmp = 1;
662 #ifdef HAVE_builtin_longjmp
663 if (HAVE_builtin_longjmp)
664 emit_insn (gen_builtin_longjmp (buf_addr));
668 fp = gen_rtx_MEM (Pmode, buf_addr);
669 lab = gen_rtx_MEM (Pmode, plus_constant (buf_addr,
670 GET_MODE_SIZE (Pmode)));
672 stack = gen_rtx_MEM (sa_mode, plus_constant (buf_addr,
673 2 * GET_MODE_SIZE (Pmode)));
674 set_mem_alias_set (fp, setjmp_alias_set);
675 set_mem_alias_set (lab, setjmp_alias_set);
676 set_mem_alias_set (stack, setjmp_alias_set);
678 /* Pick up FP, label, and SP from the block and jump. This code is
679 from expand_goto in stmt.c; see there for detailed comments. */
680 #if HAVE_nonlocal_goto
681 if (HAVE_nonlocal_goto)
682 /* We have to pass a value to the nonlocal_goto pattern that will
683 get copied into the static_chain pointer, but it does not matter
684 what that value is, because builtin_setjmp does not use it. */
685 emit_insn (gen_nonlocal_goto (value, lab, stack, fp));
689 lab = copy_to_reg (lab);
691 emit_move_insn (hard_frame_pointer_rtx, fp);
692 emit_stack_restore (SAVE_NONLOCAL, stack, NULL_RTX);
694 emit_insn (gen_rtx_USE (VOIDmode, hard_frame_pointer_rtx));
695 emit_insn (gen_rtx_USE (VOIDmode, stack_pointer_rtx));
696 emit_indirect_jump (lab);
700 /* Search backwards and mark the jump insn as a non-local goto.
701 Note that this precludes the use of __builtin_longjmp to a
702 __builtin_setjmp target in the same function. However, we've
703 already cautioned the user that these functions are for
704 internal exception handling use only. */
705 for (insn = get_last_insn (); insn; insn = PREV_INSN (insn))
707 if (GET_CODE (insn) == JUMP_INSN)
709 REG_NOTES (insn) = alloc_EXPR_LIST (REG_NON_LOCAL_GOTO, const0_rtx,
713 else if (GET_CODE (insn) == CALL_INSN)
718 /* Get a MEM rtx for expression EXP which is the address of an operand
719 to be used to be used in a string instruction (cmpstrsi, movstrsi, ..). */
725 rtx mem = gen_rtx_MEM (BLKmode,
726 memory_address (BLKmode,
727 expand_expr (exp, NULL_RTX,
728 ptr_mode, EXPAND_SUM)));
730 set_mem_attributes (mem, exp, 0);
732 /* Get an expression we can use to find the attributes to assign to MEM.
733 If it is an ADDR_EXPR, use the operand. Otherwise, dereference it if
734 we can. First remove any nops. */
735 while ((TREE_CODE (exp) == NOP_EXPR || TREE_CODE (exp) == CONVERT_EXPR
736 || TREE_CODE (exp) == NON_LVALUE_EXPR)
737 && POINTER_TYPE_P (TREE_TYPE (TREE_OPERAND (exp, 0))))
738 exp = TREE_OPERAND (exp, 0);
740 if (TREE_CODE (exp) == ADDR_EXPR)
741 exp = TREE_OPERAND (exp, 0);
742 else if (POINTER_TYPE_P (TREE_TYPE (exp)))
743 exp = build1 (INDIRECT_REF, TREE_TYPE (TREE_TYPE (exp)), exp);
747 /* memcpy, memset and other builtin stringops can alias with anything. */
748 set_mem_alias_set (mem, 0);
752 /* Built-in functions to perform an untyped call and return. */
754 /* For each register that may be used for calling a function, this
755 gives a mode used to copy the register's value. VOIDmode indicates
756 the register is not used for calling a function. If the machine
757 has register windows, this gives only the outbound registers.
758 INCOMING_REGNO gives the corresponding inbound register. */
759 static enum machine_mode apply_args_mode[FIRST_PSEUDO_REGISTER];
761 /* For each register that may be used for returning values, this gives
762 a mode used to copy the register's value. VOIDmode indicates the
763 register is not used for returning values. If the machine has
764 register windows, this gives only the outbound registers.
765 INCOMING_REGNO gives the corresponding inbound register. */
766 static enum machine_mode apply_result_mode[FIRST_PSEUDO_REGISTER];
768 /* For each register that may be used for calling a function, this
769 gives the offset of that register into the block returned by
770 __builtin_apply_args. 0 indicates that the register is not
771 used for calling a function. */
772 static int apply_args_reg_offset[FIRST_PSEUDO_REGISTER];
774 /* Return the offset of register REGNO into the block returned by
775 __builtin_apply_args. This is not declared static, since it is
776 needed in objc-act.c. */
779 apply_args_register_offset (regno)
784 /* Arguments are always put in outgoing registers (in the argument
785 block) if such make sense. */
786 #ifdef OUTGOING_REGNO
787 regno = OUTGOING_REGNO(regno);
789 return apply_args_reg_offset[regno];
792 /* Return the size required for the block returned by __builtin_apply_args,
793 and initialize apply_args_mode. */
798 static int size = -1;
800 enum machine_mode mode;
802 /* The values computed by this function never change. */
805 /* The first value is the incoming arg-pointer. */
806 size = GET_MODE_SIZE (Pmode);
808 /* The second value is the structure value address unless this is
809 passed as an "invisible" first argument. */
810 if (struct_value_rtx)
811 size += GET_MODE_SIZE (Pmode);
813 for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++)
814 if (FUNCTION_ARG_REGNO_P (regno))
816 /* Search for the proper mode for copying this register's
817 value. I'm not sure this is right, but it works so far. */
818 enum machine_mode best_mode = VOIDmode;
820 for (mode = GET_CLASS_NARROWEST_MODE (MODE_INT);
822 mode = GET_MODE_WIDER_MODE (mode))
823 if (HARD_REGNO_MODE_OK (regno, mode)
824 && HARD_REGNO_NREGS (regno, mode) == 1)
827 if (best_mode == VOIDmode)
828 for (mode = GET_CLASS_NARROWEST_MODE (MODE_FLOAT);
830 mode = GET_MODE_WIDER_MODE (mode))
831 if (HARD_REGNO_MODE_OK (regno, mode)
832 && have_insn_for (SET, mode))
836 if (mode == VOIDmode)
839 align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT;
840 if (size % align != 0)
841 size = CEIL (size, align) * align;
842 apply_args_reg_offset[regno] = size;
843 size += GET_MODE_SIZE (mode);
844 apply_args_mode[regno] = mode;
848 apply_args_mode[regno] = VOIDmode;
849 apply_args_reg_offset[regno] = 0;
855 /* Return the size required for the block returned by __builtin_apply,
856 and initialize apply_result_mode. */
861 static int size = -1;
863 enum machine_mode mode;
865 /* The values computed by this function never change. */
870 for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++)
871 if (FUNCTION_VALUE_REGNO_P (regno))
873 /* Search for the proper mode for copying this register's
874 value. I'm not sure this is right, but it works so far. */
875 enum machine_mode best_mode = VOIDmode;
877 for (mode = GET_CLASS_NARROWEST_MODE (MODE_INT);
879 mode = GET_MODE_WIDER_MODE (mode))
880 if (HARD_REGNO_MODE_OK (regno, mode))
883 if (best_mode == VOIDmode)
884 for (mode = GET_CLASS_NARROWEST_MODE (MODE_FLOAT);
886 mode = GET_MODE_WIDER_MODE (mode))
887 if (HARD_REGNO_MODE_OK (regno, mode)
888 && have_insn_for (SET, mode))
892 if (mode == VOIDmode)
895 align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT;
896 if (size % align != 0)
897 size = CEIL (size, align) * align;
898 size += GET_MODE_SIZE (mode);
899 apply_result_mode[regno] = mode;
902 apply_result_mode[regno] = VOIDmode;
904 /* Allow targets that use untyped_call and untyped_return to override
905 the size so that machine-specific information can be stored here. */
906 #ifdef APPLY_RESULT_SIZE
907 size = APPLY_RESULT_SIZE;
913 #if defined (HAVE_untyped_call) || defined (HAVE_untyped_return)
914 /* Create a vector describing the result block RESULT. If SAVEP is true,
915 the result block is used to save the values; otherwise it is used to
916 restore the values. */
919 result_vector (savep, result)
923 int regno, size, align, nelts;
924 enum machine_mode mode;
926 rtx *savevec = (rtx *) alloca (FIRST_PSEUDO_REGISTER * sizeof (rtx));
929 for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++)
930 if ((mode = apply_result_mode[regno]) != VOIDmode)
932 align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT;
933 if (size % align != 0)
934 size = CEIL (size, align) * align;
935 reg = gen_rtx_REG (mode, savep ? regno : INCOMING_REGNO (regno));
936 mem = adjust_address (result, mode, size);
937 savevec[nelts++] = (savep
938 ? gen_rtx_SET (VOIDmode, mem, reg)
939 : gen_rtx_SET (VOIDmode, reg, mem));
940 size += GET_MODE_SIZE (mode);
942 return gen_rtx_PARALLEL (VOIDmode, gen_rtvec_v (nelts, savevec));
944 #endif /* HAVE_untyped_call or HAVE_untyped_return */
946 /* Save the state required to perform an untyped call with the same
947 arguments as were passed to the current function. */
950 expand_builtin_apply_args_1 ()
953 int size, align, regno;
954 enum machine_mode mode;
956 /* Create a block where the arg-pointer, structure value address,
957 and argument registers can be saved. */
958 registers = assign_stack_local (BLKmode, apply_args_size (), -1);
960 /* Walk past the arg-pointer and structure value address. */
961 size = GET_MODE_SIZE (Pmode);
962 if (struct_value_rtx)
963 size += GET_MODE_SIZE (Pmode);
965 /* Save each register used in calling a function to the block. */
966 for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++)
967 if ((mode = apply_args_mode[regno]) != VOIDmode)
971 align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT;
972 if (size % align != 0)
973 size = CEIL (size, align) * align;
975 tem = gen_rtx_REG (mode, INCOMING_REGNO (regno));
977 emit_move_insn (adjust_address (registers, mode, size), tem);
978 size += GET_MODE_SIZE (mode);
981 /* Save the arg pointer to the block. */
982 emit_move_insn (adjust_address (registers, Pmode, 0),
983 copy_to_reg (virtual_incoming_args_rtx));
984 size = GET_MODE_SIZE (Pmode);
986 /* Save the structure value address unless this is passed as an
987 "invisible" first argument. */
988 if (struct_value_incoming_rtx)
990 emit_move_insn (adjust_address (registers, Pmode, size),
991 copy_to_reg (struct_value_incoming_rtx));
992 size += GET_MODE_SIZE (Pmode);
995 /* Return the address of the block. */
996 return copy_addr_to_reg (XEXP (registers, 0));
999 /* __builtin_apply_args returns block of memory allocated on
1000 the stack into which is stored the arg pointer, structure
1001 value address, static chain, and all the registers that might
1002 possibly be used in performing a function call. The code is
1003 moved to the start of the function so the incoming values are
1007 expand_builtin_apply_args ()
1009 /* Don't do __builtin_apply_args more than once in a function.
1010 Save the result of the first call and reuse it. */
1011 if (apply_args_value != 0)
1012 return apply_args_value;
1014 /* When this function is called, it means that registers must be
1015 saved on entry to this function. So we migrate the
1016 call to the first insn of this function. */
1021 temp = expand_builtin_apply_args_1 ();
1025 apply_args_value = temp;
1027 /* Put the sequence after the NOTE that starts the function.
1028 If this is inside a SEQUENCE, make the outer-level insn
1029 chain current, so the code is placed at the start of the
1031 push_topmost_sequence ();
1032 emit_insns_before (seq, NEXT_INSN (get_insns ()));
1033 pop_topmost_sequence ();
1038 /* Perform an untyped call and save the state required to perform an
1039 untyped return of whatever value was returned by the given function. */
1042 expand_builtin_apply (function, arguments, argsize)
1043 rtx function, arguments, argsize;
1045 int size, align, regno;
1046 enum machine_mode mode;
1047 rtx incoming_args, result, reg, dest, src, call_insn;
1048 rtx old_stack_level = 0;
1049 rtx call_fusage = 0;
1051 /* Create a block where the return registers can be saved. */
1052 result = assign_stack_local (BLKmode, apply_result_size (), -1);
1054 /* Fetch the arg pointer from the ARGUMENTS block. */
1055 incoming_args = gen_reg_rtx (Pmode);
1056 emit_move_insn (incoming_args,
1057 gen_rtx_MEM (Pmode, arguments));
1058 #ifndef STACK_GROWS_DOWNWARD
1059 incoming_args = expand_simple_binop (Pmode, MINUS, incoming_args, argsize,
1060 incoming_args, 0, OPTAB_LIB_WIDEN);
1063 /* Perform postincrements before actually calling the function. */
1066 /* Push a new argument block and copy the arguments. Do not allow
1067 the (potential) memcpy call below to interfere with our stack
1069 do_pending_stack_adjust ();
1072 /* Save the stack with nonlocal if available */
1073 #ifdef HAVE_save_stack_nonlocal
1074 if (HAVE_save_stack_nonlocal)
1075 emit_stack_save (SAVE_NONLOCAL, &old_stack_level, NULL_RTX);
1078 emit_stack_save (SAVE_BLOCK, &old_stack_level, NULL_RTX);
1080 /* Push a block of memory onto the stack to store the memory arguments.
1081 Save the address in a register, and copy the memory arguments. ??? I
1082 haven't figured out how the calling convention macros effect this,
1083 but it's likely that the source and/or destination addresses in
1084 the block copy will need updating in machine specific ways. */
1085 dest = allocate_dynamic_stack_space (argsize, 0, BITS_PER_UNIT);
1086 dest = gen_rtx_MEM (BLKmode, dest);
1087 set_mem_align (dest, PARM_BOUNDARY);
1088 src = gen_rtx_MEM (BLKmode, incoming_args);
1089 set_mem_align (src, PARM_BOUNDARY);
1090 emit_block_move (dest, src, argsize);
1092 /* Refer to the argument block. */
1094 arguments = gen_rtx_MEM (BLKmode, arguments);
1095 set_mem_align (arguments, PARM_BOUNDARY);
1097 /* Walk past the arg-pointer and structure value address. */
1098 size = GET_MODE_SIZE (Pmode);
1099 if (struct_value_rtx)
1100 size += GET_MODE_SIZE (Pmode);
1102 /* Restore each of the registers previously saved. Make USE insns
1103 for each of these registers for use in making the call. */
1104 for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++)
1105 if ((mode = apply_args_mode[regno]) != VOIDmode)
1107 align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT;
1108 if (size % align != 0)
1109 size = CEIL (size, align) * align;
1110 reg = gen_rtx_REG (mode, regno);
1111 emit_move_insn (reg, adjust_address (arguments, mode, size));
1112 use_reg (&call_fusage, reg);
1113 size += GET_MODE_SIZE (mode);
1116 /* Restore the structure value address unless this is passed as an
1117 "invisible" first argument. */
1118 size = GET_MODE_SIZE (Pmode);
1119 if (struct_value_rtx)
1121 rtx value = gen_reg_rtx (Pmode);
1122 emit_move_insn (value, adjust_address (arguments, Pmode, size));
1123 emit_move_insn (struct_value_rtx, value);
1124 if (GET_CODE (struct_value_rtx) == REG)
1125 use_reg (&call_fusage, struct_value_rtx);
1126 size += GET_MODE_SIZE (Pmode);
1129 /* All arguments and registers used for the call are set up by now! */
1130 function = prepare_call_address (function, NULL_TREE, &call_fusage, 0, 0);
1132 /* Ensure address is valid. SYMBOL_REF is already valid, so no need,
1133 and we don't want to load it into a register as an optimization,
1134 because prepare_call_address already did it if it should be done. */
1135 if (GET_CODE (function) != SYMBOL_REF)
1136 function = memory_address (FUNCTION_MODE, function);
1138 /* Generate the actual call instruction and save the return value. */
1139 #ifdef HAVE_untyped_call
1140 if (HAVE_untyped_call)
1141 emit_call_insn (gen_untyped_call (gen_rtx_MEM (FUNCTION_MODE, function),
1142 result, result_vector (1, result)));
1145 #ifdef HAVE_call_value
1146 if (HAVE_call_value)
1150 /* Locate the unique return register. It is not possible to
1151 express a call that sets more than one return register using
1152 call_value; use untyped_call for that. In fact, untyped_call
1153 only needs to save the return registers in the given block. */
1154 for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++)
1155 if ((mode = apply_result_mode[regno]) != VOIDmode)
1158 abort (); /* HAVE_untyped_call required. */
1159 valreg = gen_rtx_REG (mode, regno);
1162 emit_call_insn (GEN_CALL_VALUE (valreg,
1163 gen_rtx_MEM (FUNCTION_MODE, function),
1164 const0_rtx, NULL_RTX, const0_rtx));
1166 emit_move_insn (adjust_address (result, GET_MODE (valreg), 0), valreg);
1172 /* Find the CALL insn we just emitted. */
1173 for (call_insn = get_last_insn ();
1174 call_insn && GET_CODE (call_insn) != CALL_INSN;
1175 call_insn = PREV_INSN (call_insn))
1181 /* Put the register usage information on the CALL. If there is already
1182 some usage information, put ours at the end. */
1183 if (CALL_INSN_FUNCTION_USAGE (call_insn))
1187 for (link = CALL_INSN_FUNCTION_USAGE (call_insn); XEXP (link, 1) != 0;
1188 link = XEXP (link, 1))
1191 XEXP (link, 1) = call_fusage;
1194 CALL_INSN_FUNCTION_USAGE (call_insn) = call_fusage;
1196 /* Restore the stack. */
1197 #ifdef HAVE_save_stack_nonlocal
1198 if (HAVE_save_stack_nonlocal)
1199 emit_stack_restore (SAVE_NONLOCAL, old_stack_level, NULL_RTX);
1202 emit_stack_restore (SAVE_BLOCK, old_stack_level, NULL_RTX);
1206 /* Return the address of the result block. */
1207 return copy_addr_to_reg (XEXP (result, 0));
1210 /* Perform an untyped return. */
1213 expand_builtin_return (result)
1216 int size, align, regno;
1217 enum machine_mode mode;
1219 rtx call_fusage = 0;
1221 apply_result_size ();
1222 result = gen_rtx_MEM (BLKmode, result);
1224 #ifdef HAVE_untyped_return
1225 if (HAVE_untyped_return)
1227 emit_jump_insn (gen_untyped_return (result, result_vector (0, result)));
1233 /* Restore the return value and note that each value is used. */
1235 for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++)
1236 if ((mode = apply_result_mode[regno]) != VOIDmode)
1238 align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT;
1239 if (size % align != 0)
1240 size = CEIL (size, align) * align;
1241 reg = gen_rtx_REG (mode, INCOMING_REGNO (regno));
1242 emit_move_insn (reg, adjust_address (result, mode, size));
1244 push_to_sequence (call_fusage);
1245 emit_insn (gen_rtx_USE (VOIDmode, reg));
1246 call_fusage = get_insns ();
1248 size += GET_MODE_SIZE (mode);
1251 /* Put the USE insns before the return. */
1252 emit_insns (call_fusage);
1254 /* Return whatever values was restored by jumping directly to the end
1256 expand_null_return ();
1259 /* Used by expand_builtin_classify_type and fold_builtin_classify_type. */
1261 static enum type_class
1262 type_to_class (type)
1265 switch (TREE_CODE (type))
1267 case VOID_TYPE: return void_type_class;
1268 case INTEGER_TYPE: return integer_type_class;
1269 case CHAR_TYPE: return char_type_class;
1270 case ENUMERAL_TYPE: return enumeral_type_class;
1271 case BOOLEAN_TYPE: return boolean_type_class;
1272 case POINTER_TYPE: return pointer_type_class;
1273 case REFERENCE_TYPE: return reference_type_class;
1274 case OFFSET_TYPE: return offset_type_class;
1275 case REAL_TYPE: return real_type_class;
1276 case COMPLEX_TYPE: return complex_type_class;
1277 case FUNCTION_TYPE: return function_type_class;
1278 case METHOD_TYPE: return method_type_class;
1279 case RECORD_TYPE: return record_type_class;
1281 case QUAL_UNION_TYPE: return union_type_class;
1282 case ARRAY_TYPE: return (TYPE_STRING_FLAG (type)
1283 ? string_type_class : array_type_class);
1284 case SET_TYPE: return set_type_class;
1285 case FILE_TYPE: return file_type_class;
1286 case LANG_TYPE: return lang_type_class;
1287 default: return no_type_class;
1291 /* Expand a call to __builtin_classify_type with arguments found in
1295 expand_builtin_classify_type (arglist)
1299 return GEN_INT (type_to_class (TREE_TYPE (TREE_VALUE (arglist))));
1300 return GEN_INT (no_type_class);
1303 /* Expand expression EXP, which is a call to __builtin_constant_p. */
1306 expand_builtin_constant_p (exp)
1309 tree arglist = TREE_OPERAND (exp, 1);
1310 enum machine_mode value_mode = TYPE_MODE (TREE_TYPE (exp));
1315 arglist = TREE_VALUE (arglist);
1317 /* We have taken care of the easy cases during constant folding. This
1318 case is not obvious, so emit (constant_p_rtx (ARGLIST)) and let CSE get a
1319 chance to see if it can deduce whether ARGLIST is constant. */
1321 tmp = expand_expr (arglist, NULL_RTX, VOIDmode, 0);
1322 tmp = gen_rtx_CONSTANT_P_RTX (value_mode, tmp);
1326 /* Expand a call to one of the builtin math functions (sin, cos, or sqrt).
1327 Return 0 if a normal call should be emitted rather than expanding the
1328 function in-line. EXP is the expression that is a call to the builtin
1329 function; if convenient, the result should be placed in TARGET.
1330 SUBTARGET may be used as the target for computing one of EXP's operands. */
1333 expand_builtin_mathfn (exp, target, subtarget)
1335 rtx target, subtarget;
1337 optab builtin_optab;
1339 tree fndecl = TREE_OPERAND (TREE_OPERAND (exp, 0), 0);
1340 tree arglist = TREE_OPERAND (exp, 1);
1342 if (!validate_arglist (arglist, REAL_TYPE, VOID_TYPE))
1345 /* Stabilize and compute the argument. */
1346 if (TREE_CODE (TREE_VALUE (arglist)) != VAR_DECL
1347 && TREE_CODE (TREE_VALUE (arglist)) != PARM_DECL)
1349 exp = copy_node (exp);
1350 TREE_OPERAND (exp, 1) = arglist;
1351 /* Wrap the computation of the argument in a SAVE_EXPR. That
1352 way, if we need to expand the argument again (as in the
1353 flag_errno_math case below where we cannot directly set
1354 errno), we will not perform side-effects more than once.
1355 Note that here we're mutating the original EXP as well as the
1356 copy; that's the right thing to do in case the original EXP
1357 is expanded later. */
1358 TREE_VALUE (arglist) = save_expr (TREE_VALUE (arglist));
1359 arglist = copy_node (arglist);
1361 op0 = expand_expr (TREE_VALUE (arglist), subtarget, VOIDmode, 0);
1363 /* Make a suitable register to place result in. */
1364 target = gen_reg_rtx (TYPE_MODE (TREE_TYPE (exp)));
1369 switch (DECL_FUNCTION_CODE (fndecl))
1374 builtin_optab = sin_optab; break;
1378 builtin_optab = cos_optab; break;
1379 case BUILT_IN_FSQRT:
1380 case BUILT_IN_SQRTF:
1381 case BUILT_IN_SQRTL:
1382 builtin_optab = sqrt_optab; break;
1387 /* Compute into TARGET.
1388 Set TARGET to wherever the result comes back. */
1389 target = expand_unop (TYPE_MODE (TREE_TYPE (TREE_VALUE (arglist))),
1390 builtin_optab, op0, target, 0);
1392 /* If we were unable to expand via the builtin, stop the
1393 sequence (without outputting the insns) and return 0, causing
1394 a call to the library function. */
1401 /* If errno must be maintained and if we are not allowing unsafe
1402 math optimizations, check the result. */
1404 if (flag_errno_math && ! flag_unsafe_math_optimizations)
1408 /* Don't define the builtin FP instructions
1409 if your machine is not IEEE. */
1410 if (TARGET_FLOAT_FORMAT != IEEE_FLOAT_FORMAT)
1413 lab1 = gen_label_rtx ();
1415 /* Test the result; if it is NaN, set errno=EDOM because
1416 the argument was not in the domain. */
1417 emit_cmp_and_jump_insns (target, target, EQ, 0, GET_MODE (target),
1422 #ifdef GEN_ERRNO_RTX
1423 rtx errno_rtx = GEN_ERRNO_RTX;
1426 = gen_rtx_MEM (word_mode, gen_rtx_SYMBOL_REF (Pmode, "errno"));
1429 emit_move_insn (errno_rtx, GEN_INT (TARGET_EDOM));
1432 /* We can't set errno=EDOM directly; let the library call do it.
1433 Pop the arguments right away in case the call gets deleted. */
1435 expand_call (exp, target, 0);
1442 /* Output the entire sequence. */
1443 insns = get_insns ();
1450 /* Expand expression EXP which is a call to the strlen builtin. Return 0
1451 if we failed the caller should emit a normal call, otherwise
1452 try to get the result in TARGET, if convenient. */
1455 expand_builtin_strlen (exp, target)
1459 tree arglist = TREE_OPERAND (exp, 1);
1460 enum machine_mode value_mode = TYPE_MODE (TREE_TYPE (exp));
1462 if (!validate_arglist (arglist, POINTER_TYPE, VOID_TYPE))
1467 tree src = TREE_VALUE (arglist);
1470 = get_pointer_alignment (src, BIGGEST_ALIGNMENT) / BITS_PER_UNIT;
1472 rtx result, src_reg, char_rtx, before_strlen;
1473 enum machine_mode insn_mode = value_mode, char_mode;
1474 enum insn_code icode = CODE_FOR_nothing;
1476 /* If SRC is not a pointer type, don't do this operation inline. */
1480 /* Bail out if we can't compute strlen in the right mode. */
1481 while (insn_mode != VOIDmode)
1483 icode = strlen_optab->handlers[(int) insn_mode].insn_code;
1484 if (icode != CODE_FOR_nothing)
1487 insn_mode = GET_MODE_WIDER_MODE (insn_mode);
1489 if (insn_mode == VOIDmode)
1492 /* Make a place to write the result of the instruction. */
1495 && GET_CODE (result) == REG
1496 && GET_MODE (result) == insn_mode
1497 && REGNO (result) >= FIRST_PSEUDO_REGISTER))
1498 result = gen_reg_rtx (insn_mode);
1500 /* Make a place to hold the source address. We will not expand
1501 the actual source until we are sure that the expansion will
1502 not fail -- there are trees that cannot be expanded twice. */
1503 src_reg = gen_reg_rtx (Pmode);
1505 /* Mark the beginning of the strlen sequence so we can emit the
1506 source operand later. */
1507 before_strlen = get_last_insn();
1509 /* Check the string is readable and has an end. */
1510 if (current_function_check_memory_usage)
1511 emit_library_call (chkr_check_str_libfunc, LCT_CONST_MAKE_BLOCK,
1512 VOIDmode, 2, src_reg, Pmode,
1513 GEN_INT (MEMORY_USE_RO),
1514 TYPE_MODE (integer_type_node));
1516 char_rtx = const0_rtx;
1517 char_mode = insn_data[(int) icode].operand[2].mode;
1518 if (! (*insn_data[(int) icode].operand[2].predicate) (char_rtx,
1520 char_rtx = copy_to_mode_reg (char_mode, char_rtx);
1522 pat = GEN_FCN (icode) (result, gen_rtx_MEM (BLKmode, src_reg),
1523 char_rtx, GEN_INT (align));
1528 /* Now that we are assured of success, expand the source. */
1530 pat = memory_address (BLKmode,
1531 expand_expr (src, src_reg, ptr_mode, EXPAND_SUM));
1533 emit_move_insn (src_reg, pat);
1534 pat = gen_sequence ();
1538 emit_insn_after (pat, before_strlen);
1540 emit_insn_before (pat, get_insns ());
1542 /* Return the value in the proper mode for this function. */
1543 if (GET_MODE (result) == value_mode)
1545 else if (target != 0)
1546 convert_move (target, result, 0);
1548 target = convert_to_mode (value_mode, result, 0);
1554 /* Expand a call to the strstr builtin. Return 0 if we failed the
1555 caller should emit a normal call, otherwise try to get the result
1556 in TARGET, if convenient (and in mode MODE if that's convenient). */
1559 expand_builtin_strstr (arglist, target, mode)
1562 enum machine_mode mode;
1564 if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE)
1565 || current_function_check_memory_usage)
1569 tree s1 = TREE_VALUE (arglist), s2 = TREE_VALUE (TREE_CHAIN (arglist));
1571 const char *p1, *p2;
1580 const char *r = strstr (p1, p2);
1585 /* Return an offset into the constant string argument. */
1586 return expand_expr (fold (build (PLUS_EXPR, TREE_TYPE (s1),
1587 s1, ssize_int (r - p1))),
1588 target, mode, EXPAND_NORMAL);
1592 return expand_expr (s1, target, mode, EXPAND_NORMAL);
1597 fn = built_in_decls[BUILT_IN_STRCHR];
1601 /* New argument list transforming strstr(s1, s2) to
1602 strchr(s1, s2[0]). */
1604 build_tree_list (NULL_TREE, build_int_2 (p2[0], 0));
1605 arglist = tree_cons (NULL_TREE, s1, arglist);
1606 return expand_expr (build_function_call_expr (fn, arglist),
1607 target, mode, EXPAND_NORMAL);
1611 /* Expand a call to the strchr builtin. Return 0 if we failed the
1612 caller should emit a normal call, otherwise try to get the result
1613 in TARGET, if convenient (and in mode MODE if that's convenient). */
1616 expand_builtin_strchr (arglist, target, mode)
1619 enum machine_mode mode;
1621 if (!validate_arglist (arglist, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE)
1622 || current_function_check_memory_usage)
1626 tree s1 = TREE_VALUE (arglist), s2 = TREE_VALUE (TREE_CHAIN (arglist));
1629 if (TREE_CODE (s2) != INTEGER_CST)
1638 if (target_char_cast (s2, &c))
1646 /* Return an offset into the constant string argument. */
1647 return expand_expr (fold (build (PLUS_EXPR, TREE_TYPE (s1),
1648 s1, ssize_int (r - p1))),
1649 target, mode, EXPAND_NORMAL);
1652 /* FIXME: Should use here strchrM optab so that ports can optimize
1658 /* Expand a call to the strrchr builtin. Return 0 if we failed the
1659 caller should emit a normal call, otherwise try to get the result
1660 in TARGET, if convenient (and in mode MODE if that's convenient). */
1663 expand_builtin_strrchr (arglist, target, mode)
1666 enum machine_mode mode;
1668 if (!validate_arglist (arglist, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE)
1669 || current_function_check_memory_usage)
1673 tree s1 = TREE_VALUE (arglist), s2 = TREE_VALUE (TREE_CHAIN (arglist));
1677 if (TREE_CODE (s2) != INTEGER_CST)
1686 if (target_char_cast (s2, &c))
1689 r = strrchr (p1, c);
1694 /* Return an offset into the constant string argument. */
1695 return expand_expr (fold (build (PLUS_EXPR, TREE_TYPE (s1),
1696 s1, ssize_int (r - p1))),
1697 target, mode, EXPAND_NORMAL);
1700 if (! integer_zerop (s2))
1703 fn = built_in_decls[BUILT_IN_STRCHR];
1707 /* Transform strrchr(s1, '\0') to strchr(s1, '\0'). */
1708 return expand_expr (build_function_call_expr (fn, arglist),
1709 target, mode, EXPAND_NORMAL);
1713 /* Expand a call to the strpbrk builtin. Return 0 if we failed the
1714 caller should emit a normal call, otherwise try to get the result
1715 in TARGET, if convenient (and in mode MODE if that's convenient). */
1718 expand_builtin_strpbrk (arglist, target, mode)
1721 enum machine_mode mode;
1723 if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE)
1724 || current_function_check_memory_usage)
1728 tree s1 = TREE_VALUE (arglist), s2 = TREE_VALUE (TREE_CHAIN (arglist));
1730 const char *p1, *p2;
1739 const char *r = strpbrk (p1, p2);
1744 /* Return an offset into the constant string argument. */
1745 return expand_expr (fold (build (PLUS_EXPR, TREE_TYPE (s1),
1746 s1, ssize_int (r - p1))),
1747 target, mode, EXPAND_NORMAL);
1752 /* strpbrk(x, "") == NULL.
1753 Evaluate and ignore the arguments in case they had
1755 expand_expr (s1, const0_rtx, VOIDmode, EXPAND_NORMAL);
1760 return 0; /* Really call strpbrk. */
1762 fn = built_in_decls[BUILT_IN_STRCHR];
1766 /* New argument list transforming strpbrk(s1, s2) to
1767 strchr(s1, s2[0]). */
1769 build_tree_list (NULL_TREE, build_int_2 (p2[0], 0));
1770 arglist = tree_cons (NULL_TREE, s1, arglist);
1771 return expand_expr (build_function_call_expr (fn, arglist),
1772 target, mode, EXPAND_NORMAL);
1776 /* Callback routine for store_by_pieces. Read GET_MODE_BITSIZE (MODE)
1777 bytes from constant string DATA + OFFSET and return it as target
1781 builtin_memcpy_read_str (data, offset, mode)
1783 HOST_WIDE_INT offset;
1784 enum machine_mode mode;
1786 const char *str = (const char *) data;
1789 || ((unsigned HOST_WIDE_INT) offset + GET_MODE_SIZE (mode)
1790 > strlen (str) + 1))
1791 abort (); /* Attempt to read past the end of constant string. */
1793 return c_readstr (str + offset, mode);
1796 /* Expand a call to the memcpy builtin, with arguments in ARGLIST. */
1799 expand_builtin_memcpy (arglist)
1802 if (!validate_arglist (arglist,
1803 POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
1807 tree dest = TREE_VALUE (arglist);
1808 tree src = TREE_VALUE (TREE_CHAIN (arglist));
1809 tree len = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist)));
1810 const char *src_str;
1812 unsigned int src_align = get_pointer_alignment (src, BIGGEST_ALIGNMENT);
1813 unsigned int dest_align
1814 = get_pointer_alignment (dest, BIGGEST_ALIGNMENT);
1815 rtx dest_mem, src_mem, dest_addr, len_rtx;
1817 /* If either SRC or DEST is not a pointer type, don't do
1818 this operation in-line. */
1819 if (src_align == 0 || dest_align == 0)
1822 dest_mem = get_memory_rtx (dest);
1823 set_mem_align (dest_mem, dest_align);
1824 len_rtx = expand_expr (len, NULL_RTX, VOIDmode, 0);
1825 src_str = c_getstr (src);
1827 /* If SRC is a string constant and block move would be done
1828 by pieces, we can avoid loading the string from memory
1829 and only stored the computed constants. */
1831 && !current_function_check_memory_usage
1832 && GET_CODE (len_rtx) == CONST_INT
1833 && (unsigned HOST_WIDE_INT) INTVAL (len_rtx) <= strlen (src_str) + 1
1834 && can_store_by_pieces (INTVAL (len_rtx), builtin_memcpy_read_str,
1835 (PTR) src_str, dest_align))
1837 store_by_pieces (dest_mem, INTVAL (len_rtx),
1838 builtin_memcpy_read_str,
1839 (PTR) src_str, dest_align);
1840 return force_operand (XEXP (dest_mem, 0), NULL_RTX);
1843 src_mem = get_memory_rtx (src);
1844 set_mem_align (src_mem, src_align);
1846 /* Just copy the rights of SRC to the rights of DEST. */
1847 if (current_function_check_memory_usage)
1848 emit_library_call (chkr_copy_bitmap_libfunc, LCT_CONST_MAKE_BLOCK,
1849 VOIDmode, 3, XEXP (dest_mem, 0), Pmode,
1850 XEXP (src_mem, 0), Pmode,
1851 len_rtx, TYPE_MODE (sizetype));
1853 /* Copy word part most expediently. */
1854 dest_addr = emit_block_move (dest_mem, src_mem, len_rtx);
1857 dest_addr = force_operand (XEXP (dest_mem, 0), NULL_RTX);
1863 /* Expand expression EXP, which is a call to the strcpy builtin. Return 0
1864 if we failed the caller should emit a normal call. */
1867 expand_builtin_strcpy (exp)
1870 tree arglist = TREE_OPERAND (exp, 1);
1873 if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
1877 tree len = c_strlen (TREE_VALUE (TREE_CHAIN (arglist)));
1882 len = size_binop (PLUS_EXPR, len, ssize_int (1));
1883 chainon (arglist, build_tree_list (NULL_TREE, len));
1886 result = expand_builtin_memcpy (arglist);
1889 TREE_CHAIN (TREE_CHAIN (arglist)) = 0;
1893 /* Callback routine for store_by_pieces. Read GET_MODE_BITSIZE (MODE)
1894 bytes from constant string DATA + OFFSET and return it as target
1898 builtin_strncpy_read_str (data, offset, mode)
1900 HOST_WIDE_INT offset;
1901 enum machine_mode mode;
1903 const char *str = (const char *) data;
1905 if ((unsigned HOST_WIDE_INT) offset > strlen (str))
1908 return c_readstr (str + offset, mode);
1911 /* Expand expression EXP, which is a call to the strncpy builtin. Return 0
1912 if we failed the caller should emit a normal call. */
1915 expand_builtin_strncpy (arglist, target, mode)
1918 enum machine_mode mode;
1920 if (!validate_arglist (arglist,
1921 POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
1925 tree slen = c_strlen (TREE_VALUE (TREE_CHAIN (arglist)));
1926 tree len = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist)));
1928 /* We must be passed a constant len parameter. */
1929 if (TREE_CODE (len) != INTEGER_CST)
1932 /* If the len parameter is zero, return the dst parameter. */
1933 if (compare_tree_int (len, 0) == 0)
1935 /* Evaluate and ignore the src argument in case it has
1937 expand_expr (TREE_VALUE (TREE_CHAIN (arglist)), const0_rtx,
1938 VOIDmode, EXPAND_NORMAL);
1939 /* Return the dst parameter. */
1940 return expand_expr (TREE_VALUE (arglist), target, mode,
1944 /* Now, we must be passed a constant src ptr parameter. */
1945 if (slen == 0 || TREE_CODE (slen) != INTEGER_CST)
1948 slen = size_binop (PLUS_EXPR, slen, ssize_int (1));
1950 /* We're required to pad with trailing zeros if the requested
1951 len is greater than strlen(s2)+1. In that case try to
1952 use store_by_pieces, if it fails, punt. */
1953 if (tree_int_cst_lt (slen, len))
1955 tree dest = TREE_VALUE (arglist);
1956 unsigned int dest_align
1957 = get_pointer_alignment (dest, BIGGEST_ALIGNMENT);
1958 const char *p = c_getstr (TREE_VALUE (TREE_CHAIN (arglist)));
1961 if (!p || dest_align == 0 || !host_integerp (len, 1)
1962 || !can_store_by_pieces (tree_low_cst (len, 1),
1963 builtin_strncpy_read_str,
1964 (PTR) p, dest_align))
1967 dest_mem = get_memory_rtx (dest);
1968 store_by_pieces (dest_mem, tree_low_cst (len, 1),
1969 builtin_strncpy_read_str,
1970 (PTR) p, dest_align);
1971 return force_operand (XEXP (dest_mem, 0), NULL_RTX);
1974 /* OK transform into builtin memcpy. */
1975 return expand_builtin_memcpy (arglist);
1979 /* Callback routine for store_by_pieces. Read GET_MODE_BITSIZE (MODE)
1980 bytes from constant string DATA + OFFSET and return it as target
1984 builtin_memset_read_str (data, offset, mode)
1986 HOST_WIDE_INT offset ATTRIBUTE_UNUSED;
1987 enum machine_mode mode;
1989 const char *c = (const char *) data;
1990 char *p = alloca (GET_MODE_SIZE (mode));
1992 memset (p, *c, GET_MODE_SIZE (mode));
1994 return c_readstr (p, mode);
1997 /* Expand expression EXP, which is a call to the memset builtin. Return 0
1998 if we failed the caller should emit a normal call. */
2001 expand_builtin_memset (exp)
2004 tree arglist = TREE_OPERAND (exp, 1);
2006 if (!validate_arglist (arglist,
2007 POINTER_TYPE, INTEGER_TYPE, INTEGER_TYPE, VOID_TYPE))
2011 tree dest = TREE_VALUE (arglist);
2012 tree val = TREE_VALUE (TREE_CHAIN (arglist));
2013 tree len = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist)));
2016 unsigned int dest_align
2017 = get_pointer_alignment (dest, BIGGEST_ALIGNMENT);
2018 rtx dest_mem, dest_addr, len_rtx;
2020 /* If DEST is not a pointer type, don't do this
2021 operation in-line. */
2022 if (dest_align == 0)
2025 if (TREE_CODE (val) != INTEGER_CST)
2028 if (target_char_cast (val, &c))
2033 if (!host_integerp (len, 1))
2035 if (current_function_check_memory_usage
2036 || !can_store_by_pieces (tree_low_cst (len, 1),
2037 builtin_memset_read_str,
2038 (PTR) &c, dest_align))
2041 dest_mem = get_memory_rtx (dest);
2042 store_by_pieces (dest_mem, tree_low_cst (len, 1),
2043 builtin_memset_read_str,
2044 (PTR) &c, dest_align);
2045 return force_operand (XEXP (dest_mem, 0), NULL_RTX);
2048 len_rtx = expand_expr (len, NULL_RTX, VOIDmode, 0);
2050 dest_mem = get_memory_rtx (dest);
2051 set_mem_align (dest_mem, dest_align);
2053 /* Just check DST is writable and mark it as readable. */
2054 if (current_function_check_memory_usage)
2055 emit_library_call (chkr_check_addr_libfunc, LCT_CONST_MAKE_BLOCK,
2056 VOIDmode, 3, XEXP (dest_mem, 0), Pmode,
2057 len_rtx, TYPE_MODE (sizetype),
2058 GEN_INT (MEMORY_USE_WO),
2059 TYPE_MODE (integer_type_node));
2062 dest_addr = clear_storage (dest_mem, len_rtx);
2065 dest_addr = force_operand (XEXP (dest_mem, 0), NULL_RTX);
2071 /* Expand expression EXP, which is a call to the bzero builtin. Return 0
2072 if we failed the caller should emit a normal call. */
2075 expand_builtin_bzero (exp)
2078 tree arglist = TREE_OPERAND (exp, 1);
2079 tree dest, size, newarglist;
2082 if (!validate_arglist (arglist, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
2085 dest = TREE_VALUE (arglist);
2086 size = TREE_VALUE (TREE_CHAIN (arglist));
2088 /* New argument list transforming bzero(ptr x, int y) to
2089 memset(ptr x, int 0, size_t y). */
2091 newarglist = build_tree_list (NULL_TREE, convert (sizetype, size));
2092 newarglist = tree_cons (NULL_TREE, integer_zero_node, newarglist);
2093 newarglist = tree_cons (NULL_TREE, dest, newarglist);
2095 TREE_OPERAND (exp, 1) = newarglist;
2096 result = expand_builtin_memset(exp);
2098 /* Always restore the original arguments. */
2099 TREE_OPERAND (exp, 1) = arglist;
2104 #ifdef HAVE_cmpstrsi
2106 /* Expand expression EXP, which is a call to the memcmp or the strcmp builtin.
2107 ARGLIST is the argument list for this call. Return 0 if we failed and the
2108 caller should emit a normal call, otherwise try to get the result in
2109 TARGET, if convenient. */
2112 expand_builtin_memcmp (exp, arglist, target)
2117 /* If we need to check memory accesses, call the library function. */
2118 if (current_function_check_memory_usage)
2121 if (!validate_arglist (arglist,
2122 POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
2126 enum machine_mode mode;
2127 tree arg1 = TREE_VALUE (arglist);
2128 tree arg2 = TREE_VALUE (TREE_CHAIN (arglist));
2129 tree len = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist)));
2130 rtx arg1_rtx, arg2_rtx, arg3_rtx;
2135 = get_pointer_alignment (arg1, BIGGEST_ALIGNMENT) / BITS_PER_UNIT;
2137 = get_pointer_alignment (arg2, BIGGEST_ALIGNMENT) / BITS_PER_UNIT;
2138 enum machine_mode insn_mode
2139 = insn_data[(int) CODE_FOR_cmpstrsi].operand[0].mode;
2141 /* If we don't have POINTER_TYPE, call the function. */
2142 if (arg1_align == 0 || arg2_align == 0)
2145 /* Make a place to write the result of the instruction. */
2148 && GET_CODE (result) == REG && GET_MODE (result) == insn_mode
2149 && REGNO (result) >= FIRST_PSEUDO_REGISTER))
2150 result = gen_reg_rtx (insn_mode);
2152 arg1_rtx = get_memory_rtx (arg1);
2153 arg2_rtx = get_memory_rtx (arg2);
2154 arg3_rtx = expand_expr (len, NULL_RTX, VOIDmode, 0);
2158 insn = gen_cmpstrsi (result, arg1_rtx, arg2_rtx, arg3_rtx,
2159 GEN_INT (MIN (arg1_align, arg2_align)));
2164 emit_library_call_value (memcmp_libfunc, result, LCT_PURE_MAKE_BLOCK,
2165 TYPE_MODE (integer_type_node), 3,
2166 XEXP (arg1_rtx, 0), Pmode,
2167 XEXP (arg2_rtx, 0), Pmode,
2168 convert_to_mode (TYPE_MODE (sizetype), arg3_rtx,
2169 TREE_UNSIGNED (sizetype)),
2170 TYPE_MODE (sizetype));
2172 /* Return the value in the proper mode for this function. */
2173 mode = TYPE_MODE (TREE_TYPE (exp));
2174 if (GET_MODE (result) == mode)
2176 else if (target != 0)
2178 convert_move (target, result, 0);
2182 return convert_to_mode (mode, result, 0);
2187 /* Expand expression EXP, which is a call to the strcmp builtin. Return 0
2188 if we failed the caller should emit a normal call, otherwise try to get
2189 the result in TARGET, if convenient. */
2192 expand_builtin_strcmp (exp, target, mode)
2195 enum machine_mode mode;
2197 tree arglist = TREE_OPERAND (exp, 1);
2199 const char *p1, *p2;
2201 /* If we need to check memory accesses, call the library function. */
2202 if (current_function_check_memory_usage)
2205 if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
2208 arg1 = TREE_VALUE (arglist);
2209 arg2 = TREE_VALUE (TREE_CHAIN (arglist));
2211 p1 = c_getstr (arg1);
2212 p2 = c_getstr (arg2);
2216 const int i = strcmp (p1, p2);
2217 return (i < 0 ? constm1_rtx : (i > 0 ? const1_rtx : const0_rtx));
2220 /* If either arg is "", return an expression corresponding to
2221 (*(const unsigned char*)arg1 - (const unsigned char*)arg2). */
2222 if ((p1 && *p1 == '\0') || (p2 && *p2 == '\0'))
2224 tree cst_uchar_node = build_type_variant (unsigned_char_type_node, 1, 0);
2225 tree cst_uchar_ptr_node = build_pointer_type (cst_uchar_node);
2227 fold (build1 (CONVERT_EXPR, integer_type_node,
2228 build1 (INDIRECT_REF, cst_uchar_node,
2229 build1 (NOP_EXPR, cst_uchar_ptr_node, arg1))));
2231 fold (build1 (CONVERT_EXPR, integer_type_node,
2232 build1 (INDIRECT_REF, cst_uchar_node,
2233 build1 (NOP_EXPR, cst_uchar_ptr_node, arg2))));
2234 tree result = fold (build (MINUS_EXPR, integer_type_node, ind1, ind2));
2235 return expand_expr (result, target, mode, EXPAND_NORMAL);
2238 #ifdef HAVE_cmpstrsi
2239 if (! HAVE_cmpstrsi)
2243 tree len = c_strlen (arg1);
2244 tree len2 = c_strlen (arg2);
2248 len = size_binop (PLUS_EXPR, ssize_int (1), len);
2251 len2 = size_binop (PLUS_EXPR, ssize_int (1), len2);
2253 /* If we don't have a constant length for the first, use the length
2254 of the second, if we know it. We don't require a constant for
2255 this case; some cost analysis could be done if both are available
2256 but neither is constant. For now, assume they're equally cheap
2257 unless one has side effects.
2259 If both strings have constant lengths, use the smaller. This
2260 could arise if optimization results in strcpy being called with
2261 two fixed strings, or if the code was machine-generated. We should
2262 add some code to the `memcmp' handler below to deal with such
2263 situations, someday. */
2265 if (!len || TREE_CODE (len) != INTEGER_CST)
2267 if (len2 && !TREE_SIDE_EFFECTS (len2))
2272 else if (len2 && TREE_CODE (len2) == INTEGER_CST
2273 && tree_int_cst_lt (len2, len))
2276 /* If both arguments have side effects, we cannot optimize. */
2277 if (TREE_SIDE_EFFECTS (len))
2280 chainon (arglist, build_tree_list (NULL_TREE, len));
2281 result = expand_builtin_memcmp (exp, arglist, target);
2283 TREE_CHAIN (TREE_CHAIN (arglist)) = 0;
2292 /* Expand expression EXP, which is a call to the strncmp builtin. Return 0
2293 if we failed the caller should emit a normal call, otherwise try to get
2294 the result in TARGET, if convenient. */
2297 expand_builtin_strncmp (exp, target, mode)
2300 enum machine_mode mode;
2302 tree arglist = TREE_OPERAND (exp, 1);
2303 tree arg1, arg2, arg3;
2304 const char *p1, *p2;
2306 /* If we need to check memory accesses, call the library function. */
2307 if (current_function_check_memory_usage)
2310 if (!validate_arglist (arglist,
2311 POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
2314 arg1 = TREE_VALUE (arglist);
2315 arg2 = TREE_VALUE (TREE_CHAIN (arglist));
2316 arg3 = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist)));
2318 /* If the len parameter is zero, return zero. */
2319 if (host_integerp (arg3, 1) && tree_low_cst (arg3, 1) == 0)
2321 /* Evaluate and ignore arg1 and arg2 in case they have
2323 expand_expr (arg1, const0_rtx, VOIDmode, EXPAND_NORMAL);
2324 expand_expr (arg2, const0_rtx, VOIDmode, EXPAND_NORMAL);
2328 p1 = c_getstr (arg1);
2329 p2 = c_getstr (arg2);
2331 /* If all arguments are constant, evaluate at compile-time. */
2332 if (host_integerp (arg3, 1) && p1 && p2)
2334 const int r = strncmp (p1, p2, tree_low_cst (arg3, 1));
2335 return (r < 0 ? constm1_rtx : (r > 0 ? const1_rtx : const0_rtx));
2338 /* If len == 1 or (either string parameter is "" and (len >= 1)),
2339 return (*(const u_char*)arg1 - *(const u_char*)arg2). */
2340 if (host_integerp (arg3, 1)
2341 && (tree_low_cst (arg3, 1) == 1
2342 || (tree_low_cst (arg3, 1) > 1
2343 && ((p1 && *p1 == '\0') || (p2 && *p2 == '\0')))))
2345 tree cst_uchar_node = build_type_variant (unsigned_char_type_node, 1, 0);
2346 tree cst_uchar_ptr_node = build_pointer_type (cst_uchar_node);
2348 fold (build1 (CONVERT_EXPR, integer_type_node,
2349 build1 (INDIRECT_REF, cst_uchar_node,
2350 build1 (NOP_EXPR, cst_uchar_ptr_node, arg1))));
2352 fold (build1 (CONVERT_EXPR, integer_type_node,
2353 build1 (INDIRECT_REF, cst_uchar_node,
2354 build1 (NOP_EXPR, cst_uchar_ptr_node, arg2))));
2355 tree result = fold (build (MINUS_EXPR, integer_type_node, ind1, ind2));
2356 return expand_expr (result, target, mode, EXPAND_NORMAL);
2359 #ifdef HAVE_cmpstrsi
2360 /* If c_strlen can determine an expression for one of the string
2361 lengths, and it doesn't have side effects, then call
2362 expand_builtin_memcmp() using length MIN(strlen(string)+1, arg3). */
2365 tree newarglist, len = 0;
2367 /* Perhaps one of the strings is really constant, if so prefer
2368 that constant length over the other string's length. */
2370 len = c_strlen (arg1);
2372 len = c_strlen (arg2);
2374 /* If we still don't have a len, try either string arg as long
2375 as they don't have side effects. */
2376 if (!len && !TREE_SIDE_EFFECTS (arg1))
2377 len = c_strlen (arg1);
2378 if (!len && !TREE_SIDE_EFFECTS (arg2))
2379 len = c_strlen (arg2);
2380 /* If we still don't have a length, punt. */
2384 /* Add one to the string length. */
2385 len = fold (size_binop (PLUS_EXPR, len, ssize_int (1)));
2387 /* The actual new length parameter is MIN(len,arg3). */
2388 len = fold (build (MIN_EXPR, TREE_TYPE (len), len, arg3));
2390 newarglist = build_tree_list (NULL_TREE, len);
2391 newarglist = tree_cons (NULL_TREE, arg2, newarglist);
2392 newarglist = tree_cons (NULL_TREE, arg1, newarglist);
2393 return expand_builtin_memcmp (exp, newarglist, target);
2400 /* Expand expression EXP, which is a call to the strcat builtin.
2401 Return 0 if we failed the caller should emit a normal call,
2402 otherwise try to get the result in TARGET, if convenient. */
2405 expand_builtin_strcat (arglist, target, mode)
2408 enum machine_mode mode;
2410 /* If we need to check memory accesses, call the library function. */
2411 if (current_function_check_memory_usage)
2414 if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
2418 tree dst = TREE_VALUE (arglist),
2419 src = TREE_VALUE (TREE_CHAIN (arglist));
2420 const char *p = c_getstr (src);
2422 /* If the string length is zero, return the dst parameter. */
2423 if (p && *p == '\0')
2424 return expand_expr (dst, target, mode, EXPAND_NORMAL);
2430 /* Expand expression EXP, which is a call to the strncat builtin.
2431 Return 0 if we failed the caller should emit a normal call,
2432 otherwise try to get the result in TARGET, if convenient. */
2435 expand_builtin_strncat (arglist, target, mode)
2438 enum machine_mode mode;
2440 /* If we need to check memory accesses, call the library function. */
2441 if (current_function_check_memory_usage)
2444 if (!validate_arglist (arglist,
2445 POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
2449 tree dst = TREE_VALUE (arglist),
2450 src = TREE_VALUE (TREE_CHAIN (arglist)),
2451 len = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist)));
2452 const char *p = c_getstr (src);
2454 /* If the requested length is zero, or the src parameter string
2455 length is zero, return the dst parameter. */
2456 if ((TREE_CODE (len) == INTEGER_CST && compare_tree_int (len, 0) == 0)
2457 || (p && *p == '\0'))
2459 /* Evaluate and ignore the src and len parameters in case
2460 they have side-effects. */
2461 expand_expr (src, const0_rtx, VOIDmode, EXPAND_NORMAL);
2462 expand_expr (len, const0_rtx, VOIDmode, EXPAND_NORMAL);
2463 return expand_expr (dst, target, mode, EXPAND_NORMAL);
2466 /* If the requested len is greater than or equal to the string
2467 length, call strcat. */
2468 if (TREE_CODE (len) == INTEGER_CST && p
2469 && compare_tree_int (len, strlen (p)) >= 0)
2472 tree_cons (NULL_TREE, dst, build_tree_list (NULL_TREE, src)),
2473 fn = built_in_decls[BUILT_IN_STRCAT];
2475 /* If the replacement _DECL isn't initialized, don't do the
2480 return expand_expr (build_function_call_expr (fn, newarglist),
2481 target, mode, EXPAND_NORMAL);
2487 /* Expand expression EXP, which is a call to the strspn builtin.
2488 Return 0 if we failed the caller should emit a normal call,
2489 otherwise try to get the result in TARGET, if convenient. */
2492 expand_builtin_strspn (arglist, target, mode)
2495 enum machine_mode mode;
2497 /* If we need to check memory accesses, call the library function. */
2498 if (current_function_check_memory_usage)
2501 if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
2505 tree s1 = TREE_VALUE (arglist), s2 = TREE_VALUE (TREE_CHAIN (arglist));
2506 const char *p1 = c_getstr (s1), *p2 = c_getstr (s2);
2508 /* If both arguments are constants, evaluate at compile-time. */
2511 const size_t r = strspn (p1, p2);
2512 return expand_expr (size_int (r), target, mode, EXPAND_NORMAL);
2515 /* If either argument is "", return 0. */
2516 if ((p1 && *p1 == '\0') || (p2 && *p2 == '\0'))
2518 /* Evaluate and ignore both arguments in case either one has
2520 expand_expr (s1, const0_rtx, VOIDmode, EXPAND_NORMAL);
2521 expand_expr (s2, const0_rtx, VOIDmode, EXPAND_NORMAL);
2528 /* Expand expression EXP, which is a call to the strcspn builtin.
2529 Return 0 if we failed the caller should emit a normal call,
2530 otherwise try to get the result in TARGET, if convenient. */
2533 expand_builtin_strcspn (arglist, target, mode)
2536 enum machine_mode mode;
2538 /* If we need to check memory accesses, call the library function. */
2539 if (current_function_check_memory_usage)
2542 if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
2546 tree s1 = TREE_VALUE (arglist), s2 = TREE_VALUE (TREE_CHAIN (arglist));
2547 const char *p1 = c_getstr (s1), *p2 = c_getstr (s2);
2549 /* If both arguments are constants, evaluate at compile-time. */
2552 const size_t r = strcspn (p1, p2);
2553 return expand_expr (size_int (r), target, mode, EXPAND_NORMAL);
2556 /* If the first argument is "", return 0. */
2557 if (p1 && *p1 == '\0')
2559 /* Evaluate and ignore argument s2 in case it has
2561 expand_expr (s2, const0_rtx, VOIDmode, EXPAND_NORMAL);
2565 /* If the second argument is "", return __builtin_strlen(s1). */
2566 if (p2 && *p2 == '\0')
2568 tree newarglist = build_tree_list (NULL_TREE, s1),
2569 fn = built_in_decls[BUILT_IN_STRLEN];
2571 /* If the replacement _DECL isn't initialized, don't do the
2576 return expand_expr (build_function_call_expr (fn, newarglist),
2577 target, mode, EXPAND_NORMAL);
2583 /* Expand a call to __builtin_saveregs, generating the result in TARGET,
2584 if that's convenient. */
2587 expand_builtin_saveregs ()
2591 /* Don't do __builtin_saveregs more than once in a function.
2592 Save the result of the first call and reuse it. */
2593 if (saveregs_value != 0)
2594 return saveregs_value;
2596 /* When this function is called, it means that registers must be
2597 saved on entry to this function. So we migrate the call to the
2598 first insn of this function. */
2602 #ifdef EXPAND_BUILTIN_SAVEREGS
2603 /* Do whatever the machine needs done in this case. */
2604 val = EXPAND_BUILTIN_SAVEREGS ();
2606 /* ??? We used to try and build up a call to the out of line function,
2607 guessing about what registers needed saving etc. This became much
2608 harder with __builtin_va_start, since we don't have a tree for a
2609 call to __builtin_saveregs to fall back on. There was exactly one
2610 port (i860) that used this code, and I'm unconvinced it could actually
2611 handle the general case. So we no longer try to handle anything
2612 weird and make the backend absorb the evil. */
2614 error ("__builtin_saveregs not supported by this target");
2621 saveregs_value = val;
2623 /* Put the sequence after the NOTE that starts the function. If this
2624 is inside a SEQUENCE, make the outer-level insn chain current, so
2625 the code is placed at the start of the function. */
2626 push_topmost_sequence ();
2627 emit_insns_after (seq, get_insns ());
2628 pop_topmost_sequence ();
2633 /* __builtin_args_info (N) returns word N of the arg space info
2634 for the current function. The number and meanings of words
2635 is controlled by the definition of CUMULATIVE_ARGS. */
2638 expand_builtin_args_info (exp)
2641 tree arglist = TREE_OPERAND (exp, 1);
2642 int nwords = sizeof (CUMULATIVE_ARGS) / sizeof (int);
2643 int *word_ptr = (int *) ¤t_function_args_info;
2645 /* These are used by the code below that is if 0'ed away */
2647 tree type, elts, result;
2650 if (sizeof (CUMULATIVE_ARGS) % sizeof (int) != 0)
2655 if (!host_integerp (TREE_VALUE (arglist), 0))
2656 error ("argument of `__builtin_args_info' must be constant");
2659 HOST_WIDE_INT wordnum = tree_low_cst (TREE_VALUE (arglist), 0);
2661 if (wordnum < 0 || wordnum >= nwords)
2662 error ("argument of `__builtin_args_info' out of range");
2664 return GEN_INT (word_ptr[wordnum]);
2668 error ("missing argument in `__builtin_args_info'");
2673 for (i = 0; i < nwords; i++)
2674 elts = tree_cons (NULL_TREE, build_int_2 (word_ptr[i], 0));
2676 type = build_array_type (integer_type_node,
2677 build_index_type (build_int_2 (nwords, 0)));
2678 result = build (CONSTRUCTOR, type, NULL_TREE, nreverse (elts));
2679 TREE_CONSTANT (result) = 1;
2680 TREE_STATIC (result) = 1;
2681 result = build1 (INDIRECT_REF, build_pointer_type (type), result);
2682 TREE_CONSTANT (result) = 1;
2683 return expand_expr (result, NULL_RTX, VOIDmode, EXPAND_MEMORY_USE_BAD);
2687 /* Expand ARGLIST, from a call to __builtin_next_arg. */
2690 expand_builtin_next_arg (arglist)
2693 tree fntype = TREE_TYPE (current_function_decl);
2695 if ((TYPE_ARG_TYPES (fntype) == 0
2696 || (TREE_VALUE (tree_last (TYPE_ARG_TYPES (fntype)))
2698 && ! current_function_varargs)
2700 error ("`va_start' used in function with fixed args");
2706 tree last_parm = tree_last (DECL_ARGUMENTS (current_function_decl));
2707 tree arg = TREE_VALUE (arglist);
2709 /* Strip off all nops for the sake of the comparison. This
2710 is not quite the same as STRIP_NOPS. It does more.
2711 We must also strip off INDIRECT_EXPR for C++ reference
2713 while (TREE_CODE (arg) == NOP_EXPR
2714 || TREE_CODE (arg) == CONVERT_EXPR
2715 || TREE_CODE (arg) == NON_LVALUE_EXPR
2716 || TREE_CODE (arg) == INDIRECT_REF)
2717 arg = TREE_OPERAND (arg, 0);
2718 if (arg != last_parm)
2719 warning ("second parameter of `va_start' not last named argument");
2721 else if (! current_function_varargs)
2722 /* Evidently an out of date version of <stdarg.h>; can't validate
2723 va_start's second argument, but can still work as intended. */
2724 warning ("`__builtin_next_arg' called without an argument");
2726 return expand_binop (Pmode, add_optab,
2727 current_function_internal_arg_pointer,
2728 current_function_arg_offset_rtx,
2729 NULL_RTX, 0, OPTAB_LIB_WIDEN);
2732 /* Make it easier for the backends by protecting the valist argument
2733 from multiple evaluations. */
2736 stabilize_va_list (valist, needs_lvalue)
2740 if (TREE_CODE (va_list_type_node) == ARRAY_TYPE)
2742 if (TREE_SIDE_EFFECTS (valist))
2743 valist = save_expr (valist);
2745 /* For this case, the backends will be expecting a pointer to
2746 TREE_TYPE (va_list_type_node), but it's possible we've
2747 actually been given an array (an actual va_list_type_node).
2749 if (TREE_CODE (TREE_TYPE (valist)) == ARRAY_TYPE)
2751 tree p1 = build_pointer_type (TREE_TYPE (va_list_type_node));
2752 tree p2 = build_pointer_type (va_list_type_node);
2754 valist = build1 (ADDR_EXPR, p2, valist);
2755 valist = fold (build1 (NOP_EXPR, p1, valist));
2764 if (! TREE_SIDE_EFFECTS (valist))
2767 pt = build_pointer_type (va_list_type_node);
2768 valist = fold (build1 (ADDR_EXPR, pt, valist));
2769 TREE_SIDE_EFFECTS (valist) = 1;
2772 if (TREE_SIDE_EFFECTS (valist))
2773 valist = save_expr (valist);
2774 valist = fold (build1 (INDIRECT_REF, TREE_TYPE (TREE_TYPE (valist)),
2781 /* The "standard" implementation of va_start: just assign `nextarg' to
2785 std_expand_builtin_va_start (stdarg_p, valist, nextarg)
2794 /* The dummy named parameter is declared as a 'word' sized
2795 object, but if a 'word' is smaller than an 'int', it would
2796 have been promoted to int when it was added to the arglist. */
2797 int align = PARM_BOUNDARY / BITS_PER_UNIT;
2798 int size = MAX (UNITS_PER_WORD,
2799 GET_MODE_SIZE (TYPE_MODE (integer_type_node)));
2800 int offset = ((size + align - 1) / align) * align;
2801 nextarg = plus_constant (nextarg, -offset);
2804 t = build (MODIFY_EXPR, TREE_TYPE (valist), valist,
2805 make_tree (ptr_type_node, nextarg));
2806 TREE_SIDE_EFFECTS (t) = 1;
2808 expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL);
2811 /* Expand ARGLIST, which from a call to __builtin_stdarg_va_start or
2812 __builtin_varargs_va_start, depending on STDARG_P. */
2815 expand_builtin_va_start (stdarg_p, arglist)
2820 tree chain = arglist, valist;
2823 nextarg = expand_builtin_next_arg (chain = TREE_CHAIN (arglist));
2825 nextarg = expand_builtin_next_arg (NULL_TREE);
2827 if (TREE_CHAIN (chain))
2828 error ("too many arguments to function `va_start'");
2830 valist = stabilize_va_list (TREE_VALUE (arglist), 1);
2832 #ifdef EXPAND_BUILTIN_VA_START
2833 EXPAND_BUILTIN_VA_START (stdarg_p, valist, nextarg);
2835 std_expand_builtin_va_start (stdarg_p, valist, nextarg);
2841 /* The "standard" implementation of va_arg: read the value from the
2842 current (padded) address and increment by the (padded) size. */
2845 std_expand_builtin_va_arg (valist, type)
2849 HOST_WIDE_INT align;
2850 HOST_WIDE_INT rounded_size;
2853 /* Compute the rounded size of the type. */
2854 align = PARM_BOUNDARY / BITS_PER_UNIT;
2855 rounded_size = (((int_size_in_bytes (type) + align - 1) / align) * align);
2859 if (PAD_VARARGS_DOWN)
2861 /* Small args are padded downward. */
2864 = rounded_size > align ? rounded_size : int_size_in_bytes (type);
2866 addr_tree = build (PLUS_EXPR, TREE_TYPE (addr_tree), addr_tree,
2867 build_int_2 (rounded_size - adj, 0));
2870 addr = expand_expr (addr_tree, NULL_RTX, Pmode, EXPAND_NORMAL);
2871 addr = copy_to_reg (addr);
2873 /* Compute new value for AP. */
2874 t = build (MODIFY_EXPR, TREE_TYPE (valist), valist,
2875 build (PLUS_EXPR, TREE_TYPE (valist), valist,
2876 build_int_2 (rounded_size, 0)));
2877 TREE_SIDE_EFFECTS (t) = 1;
2878 expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL);
2883 /* Expand __builtin_va_arg, which is not really a builtin function, but
2884 a very special sort of operator. */
2887 expand_builtin_va_arg (valist, type)
2891 tree promoted_type, want_va_type, have_va_type;
2893 /* Verify that valist is of the proper type. */
2895 want_va_type = va_list_type_node;
2896 have_va_type = TREE_TYPE (valist);
2897 if (TREE_CODE (want_va_type) == ARRAY_TYPE)
2899 /* If va_list is an array type, the argument may have decayed
2900 to a pointer type, e.g. by being passed to another function.
2901 In that case, unwrap both types so that we can compare the
2902 underlying records. */
2903 if (TREE_CODE (have_va_type) == ARRAY_TYPE
2904 || TREE_CODE (have_va_type) == POINTER_TYPE)
2906 want_va_type = TREE_TYPE (want_va_type);
2907 have_va_type = TREE_TYPE (have_va_type);
2910 if (TYPE_MAIN_VARIANT (want_va_type) != TYPE_MAIN_VARIANT (have_va_type))
2912 error ("first argument to `va_arg' not of type `va_list'");
2916 /* Generate a diagnostic for requesting data of a type that cannot
2917 be passed through `...' due to type promotion at the call site. */
2918 else if ((promoted_type = (*lang_type_promotes_to) (type)) != NULL_TREE)
2920 const char *name = "<anonymous type>", *pname = 0;
2921 static int gave_help;
2923 if (TYPE_NAME (type))
2925 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
2926 name = IDENTIFIER_POINTER (TYPE_NAME (type));
2927 else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
2928 && DECL_NAME (TYPE_NAME (type)))
2929 name = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (type)));
2931 if (TYPE_NAME (promoted_type))
2933 if (TREE_CODE (TYPE_NAME (promoted_type)) == IDENTIFIER_NODE)
2934 pname = IDENTIFIER_POINTER (TYPE_NAME (promoted_type));
2935 else if (TREE_CODE (TYPE_NAME (promoted_type)) == TYPE_DECL
2936 && DECL_NAME (TYPE_NAME (promoted_type)))
2937 pname = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (promoted_type)));
2940 error ("`%s' is promoted to `%s' when passed through `...'", name, pname);
2944 error ("(so you should pass `%s' not `%s' to `va_arg')", pname, name);
2951 /* Make it easier for the backends by protecting the valist argument
2952 from multiple evaluations. */
2953 valist = stabilize_va_list (valist, 0);
2955 #ifdef EXPAND_BUILTIN_VA_ARG
2956 addr = EXPAND_BUILTIN_VA_ARG (valist, type);
2958 addr = std_expand_builtin_va_arg (valist, type);
2962 result = gen_rtx_MEM (TYPE_MODE (type), addr);
2963 set_mem_alias_set (result, get_varargs_alias_set ());
2968 /* Expand ARGLIST, from a call to __builtin_va_end. */
2971 expand_builtin_va_end (arglist)
2974 tree valist = TREE_VALUE (arglist);
2976 #ifdef EXPAND_BUILTIN_VA_END
2977 valist = stabilize_va_list (valist, 0);
2978 EXPAND_BUILTIN_VA_END(arglist);
2980 /* Evaluate for side effects, if needed. I hate macros that don't
2982 if (TREE_SIDE_EFFECTS (valist))
2983 expand_expr (valist, const0_rtx, VOIDmode, EXPAND_NORMAL);
2989 /* Expand ARGLIST, from a call to __builtin_va_copy. We do this as a
2990 builtin rather than just as an assignment in stdarg.h because of the
2991 nastiness of array-type va_list types. */
2994 expand_builtin_va_copy (arglist)
2999 dst = TREE_VALUE (arglist);
3000 src = TREE_VALUE (TREE_CHAIN (arglist));
3002 dst = stabilize_va_list (dst, 1);
3003 src = stabilize_va_list (src, 0);
3005 if (TREE_CODE (va_list_type_node) != ARRAY_TYPE)
3007 t = build (MODIFY_EXPR, va_list_type_node, dst, src);
3008 TREE_SIDE_EFFECTS (t) = 1;
3009 expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL);
3013 rtx dstb, srcb, size;
3015 /* Evaluate to pointers. */
3016 dstb = expand_expr (dst, NULL_RTX, Pmode, EXPAND_NORMAL);
3017 srcb = expand_expr (src, NULL_RTX, Pmode, EXPAND_NORMAL);
3018 size = expand_expr (TYPE_SIZE_UNIT (va_list_type_node), NULL_RTX,
3019 VOIDmode, EXPAND_NORMAL);
3021 /* "Dereference" to BLKmode memories. */
3022 dstb = gen_rtx_MEM (BLKmode, dstb);
3023 set_mem_alias_set (dstb, get_alias_set (TREE_TYPE (TREE_TYPE (dst))));
3024 set_mem_align (dstb, TYPE_ALIGN (va_list_type_node));
3025 srcb = gen_rtx_MEM (BLKmode, srcb);
3026 set_mem_alias_set (srcb, get_alias_set (TREE_TYPE (TREE_TYPE (src))));
3027 set_mem_align (srcb, TYPE_ALIGN (va_list_type_node));
3030 emit_block_move (dstb, srcb, size);
3036 /* Expand a call to one of the builtin functions __builtin_frame_address or
3037 __builtin_return_address. */
3040 expand_builtin_frame_address (exp)
3043 tree fndecl = TREE_OPERAND (TREE_OPERAND (exp, 0), 0);
3044 tree arglist = TREE_OPERAND (exp, 1);
3046 /* The argument must be a nonnegative integer constant.
3047 It counts the number of frames to scan up the stack.
3048 The value is the return address saved in that frame. */
3050 /* Warning about missing arg was already issued. */
3052 else if (! host_integerp (TREE_VALUE (arglist), 1))
3054 if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_FRAME_ADDRESS)
3055 error ("invalid arg to `__builtin_frame_address'");
3057 error ("invalid arg to `__builtin_return_address'");
3063 = expand_builtin_return_addr (DECL_FUNCTION_CODE (fndecl),
3064 tree_low_cst (TREE_VALUE (arglist), 1),
3065 hard_frame_pointer_rtx);
3067 /* Some ports cannot access arbitrary stack frames. */
3070 if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_FRAME_ADDRESS)
3071 warning ("unsupported arg to `__builtin_frame_address'");
3073 warning ("unsupported arg to `__builtin_return_address'");
3077 /* For __builtin_frame_address, return what we've got. */
3078 if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_FRAME_ADDRESS)
3081 if (GET_CODE (tem) != REG
3082 && ! CONSTANT_P (tem))
3083 tem = copy_to_mode_reg (Pmode, tem);
3088 /* Expand a call to the alloca builtin, with arguments ARGLIST. Return 0 if
3089 we failed and the caller should emit a normal call, otherwise try to get
3090 the result in TARGET, if convenient. */
3093 expand_builtin_alloca (arglist, target)
3100 if (!validate_arglist (arglist, INTEGER_TYPE, VOID_TYPE))
3103 /* Compute the argument. */
3104 op0 = expand_expr (TREE_VALUE (arglist), NULL_RTX, VOIDmode, 0);
3106 /* Allocate the desired space. */
3107 result = allocate_dynamic_stack_space (op0, target, BITS_PER_UNIT);
3109 #ifdef POINTERS_EXTEND_UNSIGNED
3110 if (GET_MODE (result) != ptr_mode)
3111 result = convert_memory_address (ptr_mode, result);
3117 /* Expand a call to the ffs builtin. The arguments are in ARGLIST.
3118 Return 0 if a normal call should be emitted rather than expanding the
3119 function in-line. If convenient, the result should be placed in TARGET.
3120 SUBTARGET may be used as the target for computing one of EXP's operands. */
3123 expand_builtin_ffs (arglist, target, subtarget)
3125 rtx target, subtarget;
3128 if (!validate_arglist (arglist, INTEGER_TYPE, VOID_TYPE))
3131 /* Compute the argument. */
3132 op0 = expand_expr (TREE_VALUE (arglist), subtarget, VOIDmode, 0);
3133 /* Compute ffs, into TARGET if possible.
3134 Set TARGET to wherever the result comes back. */
3135 target = expand_unop (TYPE_MODE (TREE_TYPE (TREE_VALUE (arglist))),
3136 ffs_optab, op0, target, 1);
3142 /* If the string passed to fputs is a constant and is one character
3143 long, we attempt to transform this call into __builtin_fputc(). */
3146 expand_builtin_fputs (arglist, ignore)
3150 tree len, fn, fn_fputc = built_in_decls[BUILT_IN_FPUTC],
3151 fn_fwrite = built_in_decls[BUILT_IN_FWRITE];
3153 /* If the return value is used, or the replacement _DECL isn't
3154 initialized, don't do the transformation. */
3155 if (!ignore || !fn_fputc || !fn_fwrite)
3158 /* Verify the arguments in the original call. */
3159 if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE)
3160 || current_function_check_memory_usage)
3163 /* Get the length of the string passed to fputs. If the length
3164 can't be determined, punt. */
3165 if (!(len = c_strlen (TREE_VALUE (arglist)))
3166 || TREE_CODE (len) != INTEGER_CST)
3169 switch (compare_tree_int (len, 1))
3171 case -1: /* length is 0, delete the call entirely . */
3173 /* Evaluate and ignore the argument in case it has
3175 expand_expr (TREE_VALUE (TREE_CHAIN (arglist)), const0_rtx,
3176 VOIDmode, EXPAND_NORMAL);
3179 case 0: /* length is 1, call fputc. */
3181 const char *p = c_getstr (TREE_VALUE (arglist));
3185 /* New argument list transforming fputs(string, stream) to
3186 fputc(string[0], stream). */
3188 build_tree_list (NULL_TREE, TREE_VALUE (TREE_CHAIN (arglist)));
3190 tree_cons (NULL_TREE, build_int_2 (p[0], 0), arglist);
3196 case 1: /* length is greater than 1, call fwrite. */
3198 tree string_arg = TREE_VALUE (arglist);
3200 /* New argument list transforming fputs(string, stream) to
3201 fwrite(string, 1, len, stream). */
3202 arglist = build_tree_list (NULL_TREE, TREE_VALUE (TREE_CHAIN (arglist)));
3203 arglist = tree_cons (NULL_TREE, len, arglist);
3204 arglist = tree_cons (NULL_TREE, size_one_node, arglist);
3205 arglist = tree_cons (NULL_TREE, string_arg, arglist);
3213 return expand_expr (build_function_call_expr (fn, arglist),
3214 (ignore ? const0_rtx : NULL_RTX),
3215 VOIDmode, EXPAND_NORMAL);
3218 /* Expand a call to __builtin_expect. We return our argument and emit a
3219 NOTE_INSN_EXPECTED_VALUE note. This is the expansion of __builtin_expect in
3220 a non-jump context. */
3223 expand_builtin_expect (arglist, target)
3230 if (arglist == NULL_TREE
3231 || TREE_CHAIN (arglist) == NULL_TREE)
3233 exp = TREE_VALUE (arglist);
3234 c = TREE_VALUE (TREE_CHAIN (arglist));
3236 if (TREE_CODE (c) != INTEGER_CST)
3238 error ("second arg to `__builtin_expect' must be a constant");
3239 c = integer_zero_node;
3242 target = expand_expr (exp, target, VOIDmode, EXPAND_NORMAL);
3244 /* Don't bother with expected value notes for integral constants. */
3245 if (GET_CODE (target) != CONST_INT)
3247 /* We do need to force this into a register so that we can be
3248 moderately sure to be able to correctly interpret the branch
3250 target = force_reg (GET_MODE (target), target);
3252 rtx_c = expand_expr (c, NULL_RTX, GET_MODE (target), EXPAND_NORMAL);
3254 note = emit_note (NULL, NOTE_INSN_EXPECTED_VALUE);
3255 NOTE_EXPECTED_VALUE (note) = gen_rtx_EQ (VOIDmode, target, rtx_c);
3261 /* Like expand_builtin_expect, except do this in a jump context. This is
3262 called from do_jump if the conditional is a __builtin_expect. Return either
3263 a SEQUENCE of insns to emit the jump or NULL if we cannot optimize
3264 __builtin_expect. We need to optimize this at jump time so that machines
3265 like the PowerPC don't turn the test into a SCC operation, and then jump
3266 based on the test being 0/1. */
3269 expand_builtin_expect_jump (exp, if_false_label, if_true_label)
3274 tree arglist = TREE_OPERAND (exp, 1);
3275 tree arg0 = TREE_VALUE (arglist);
3276 tree arg1 = TREE_VALUE (TREE_CHAIN (arglist));
3279 /* Only handle __builtin_expect (test, 0) and
3280 __builtin_expect (test, 1). */
3281 if (TREE_CODE (TREE_TYPE (arg1)) == INTEGER_TYPE
3282 && (integer_zerop (arg1) || integer_onep (arg1)))
3287 /* If we fail to locate an appropriate conditional jump, we'll
3288 fall back to normal evaluation. Ensure that the expression
3289 can be re-evaluated. */
3290 switch (unsafe_for_reeval (arg0))
3295 case 1: /* Mildly unsafe. */
3296 arg0 = unsave_expr (arg0);
3299 case 2: /* Wildly unsafe. */
3303 /* Expand the jump insns. */
3305 do_jump (arg0, if_false_label, if_true_label);
3306 ret = gen_sequence ();
3309 /* Now that the __builtin_expect has been validated, go through and add
3310 the expect's to each of the conditional jumps. If we run into an
3311 error, just give up and generate the 'safe' code of doing a SCC
3312 operation and then doing a branch on that. */
3313 for (j = 0; j < XVECLEN (ret, 0); j++)
3315 rtx insn = XVECEXP (ret, 0, j);
3318 if (GET_CODE (insn) == JUMP_INSN && any_condjump_p (insn)
3319 && (pattern = pc_set (insn)) != NULL_RTX)
3321 rtx ifelse = SET_SRC (pattern);
3325 if (GET_CODE (ifelse) != IF_THEN_ELSE)
3328 if (GET_CODE (XEXP (ifelse, 1)) == LABEL_REF)
3331 label = XEXP (XEXP (ifelse, 1), 0);
3333 /* An inverted jump reverses the probabilities. */
3334 else if (GET_CODE (XEXP (ifelse, 2)) == LABEL_REF)
3337 label = XEXP (XEXP (ifelse, 2), 0);
3339 /* We shouldn't have to worry about conditional returns during
3340 the expansion stage, but handle it gracefully anyway. */
3341 else if (GET_CODE (XEXP (ifelse, 1)) == RETURN)
3346 /* An inverted return reverses the probabilities. */
3347 else if (GET_CODE (XEXP (ifelse, 2)) == RETURN)
3355 /* If the test is expected to fail, reverse the
3357 if (integer_zerop (arg1))
3360 /* If we are jumping to the false label, reverse the
3362 if (label == NULL_RTX)
3363 ; /* conditional return */
3364 else if (label == if_false_label)
3366 else if (label != if_true_label)
3370 predict_insn_def (insn, PRED_BUILTIN_EXPECT, taken);
3374 /* If no jumps were modified, fail and do __builtin_expect the normal
3383 /* Expand an expression EXP that calls a built-in function,
3384 with result going to TARGET if that's convenient
3385 (and in mode MODE if that's convenient).
3386 SUBTARGET may be used as the target for computing one of EXP's operands.
3387 IGNORE is nonzero if the value is to be ignored. */
3390 expand_builtin (exp, target, subtarget, mode, ignore)
3394 enum machine_mode mode;
3397 tree fndecl = TREE_OPERAND (TREE_OPERAND (exp, 0), 0);
3398 tree arglist = TREE_OPERAND (exp, 1);
3399 enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl);
3401 if (DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_MD)
3402 return (*targetm.expand_builtin) (exp, target, subtarget, mode, ignore);
3404 /* When not optimizing, generate calls to library functions for a certain
3406 if (! optimize && ! CALLED_AS_BUILT_IN (fndecl)
3407 && (fcode == BUILT_IN_SIN || fcode == BUILT_IN_COS
3408 || fcode == BUILT_IN_FSQRT || fcode == BUILT_IN_SQRTF
3409 || fcode == BUILT_IN_SQRTL || fcode == BUILT_IN_MEMSET
3410 || fcode == BUILT_IN_MEMCPY || fcode == BUILT_IN_MEMCMP
3411 || fcode == BUILT_IN_BCMP || fcode == BUILT_IN_BZERO
3412 || fcode == BUILT_IN_INDEX || fcode == BUILT_IN_RINDEX
3413 || fcode == BUILT_IN_STRCHR || fcode == BUILT_IN_STRRCHR
3414 || fcode == BUILT_IN_STRLEN || fcode == BUILT_IN_STRCPY
3415 || fcode == BUILT_IN_STRNCPY || fcode == BUILT_IN_STRNCMP
3416 || fcode == BUILT_IN_STRSTR || fcode == BUILT_IN_STRPBRK
3417 || fcode == BUILT_IN_STRCAT || fcode == BUILT_IN_STRNCAT
3418 || fcode == BUILT_IN_STRSPN || fcode == BUILT_IN_STRCSPN
3419 || fcode == BUILT_IN_STRCMP || fcode == BUILT_IN_FFS
3420 || fcode == BUILT_IN_PUTCHAR || fcode == BUILT_IN_PUTS
3421 || fcode == BUILT_IN_PRINTF || fcode == BUILT_IN_FPUTC
3422 || fcode == BUILT_IN_FPUTS || fcode == BUILT_IN_FWRITE))
3423 return expand_call (exp, target, ignore);
3429 case BUILT_IN_LLABS:
3430 case BUILT_IN_IMAXABS:
3432 case BUILT_IN_FABSF:
3433 case BUILT_IN_FABSL:
3434 /* build_function_call changes these into ABS_EXPR. */
3438 case BUILT_IN_CONJF:
3439 case BUILT_IN_CONJL:
3440 case BUILT_IN_CREAL:
3441 case BUILT_IN_CREALF:
3442 case BUILT_IN_CREALL:
3443 case BUILT_IN_CIMAG:
3444 case BUILT_IN_CIMAGF:
3445 case BUILT_IN_CIMAGL:
3446 /* expand_tree_builtin changes these into CONJ_EXPR, REALPART_EXPR
3447 and IMAGPART_EXPR. */
3456 /* Treat these like sqrt only if unsafe math optimizations are allowed,
3457 because of possible accuracy problems. */
3458 if (! flag_unsafe_math_optimizations)
3460 case BUILT_IN_FSQRT:
3461 case BUILT_IN_SQRTF:
3462 case BUILT_IN_SQRTL:
3463 target = expand_builtin_mathfn (exp, target, subtarget);
3471 case BUILT_IN_APPLY_ARGS:
3472 return expand_builtin_apply_args ();
3474 /* __builtin_apply (FUNCTION, ARGUMENTS, ARGSIZE) invokes
3475 FUNCTION with a copy of the parameters described by
3476 ARGUMENTS, and ARGSIZE. It returns a block of memory
3477 allocated on the stack into which is stored all the registers
3478 that might possibly be used for returning the result of a
3479 function. ARGUMENTS is the value returned by
3480 __builtin_apply_args. ARGSIZE is the number of bytes of
3481 arguments that must be copied. ??? How should this value be
3482 computed? We'll also need a safe worst case value for varargs
3484 case BUILT_IN_APPLY:
3485 if (!validate_arglist (arglist, POINTER_TYPE,
3486 POINTER_TYPE, INTEGER_TYPE, VOID_TYPE)
3487 && !validate_arglist (arglist, REFERENCE_TYPE,
3488 POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
3496 for (t = arglist, i = 0; t; t = TREE_CHAIN (t), i++)
3497 ops[i] = expand_expr (TREE_VALUE (t), NULL_RTX, VOIDmode, 0);
3499 return expand_builtin_apply (ops[0], ops[1], ops[2]);
3502 /* __builtin_return (RESULT) causes the function to return the
3503 value described by RESULT. RESULT is address of the block of
3504 memory returned by __builtin_apply. */
3505 case BUILT_IN_RETURN:
3506 if (validate_arglist (arglist, POINTER_TYPE, VOID_TYPE))
3507 expand_builtin_return (expand_expr (TREE_VALUE (arglist),
3508 NULL_RTX, VOIDmode, 0));
3511 case BUILT_IN_SAVEREGS:
3512 return expand_builtin_saveregs ();
3514 case BUILT_IN_ARGS_INFO:
3515 return expand_builtin_args_info (exp);
3517 /* Return the address of the first anonymous stack arg. */
3518 case BUILT_IN_NEXT_ARG:
3519 return expand_builtin_next_arg (arglist);
3521 case BUILT_IN_CLASSIFY_TYPE:
3522 return expand_builtin_classify_type (arglist);
3524 case BUILT_IN_CONSTANT_P:
3525 return expand_builtin_constant_p (exp);
3527 case BUILT_IN_FRAME_ADDRESS:
3528 case BUILT_IN_RETURN_ADDRESS:
3529 return expand_builtin_frame_address (exp);
3531 /* Returns the address of the area where the structure is returned.
3533 case BUILT_IN_AGGREGATE_INCOMING_ADDRESS:
3535 || ! AGGREGATE_TYPE_P (TREE_TYPE (TREE_TYPE (current_function_decl)))
3536 || GET_CODE (DECL_RTL (DECL_RESULT (current_function_decl))) != MEM)
3539 return XEXP (DECL_RTL (DECL_RESULT (current_function_decl)), 0);
3541 case BUILT_IN_ALLOCA:
3542 target = expand_builtin_alloca (arglist, target);
3548 target = expand_builtin_ffs (arglist, target, subtarget);
3553 case BUILT_IN_STRLEN:
3554 target = expand_builtin_strlen (exp, target);
3559 case BUILT_IN_STRCPY:
3560 target = expand_builtin_strcpy (exp);
3565 case BUILT_IN_STRNCPY:
3566 target = expand_builtin_strncpy (arglist, target, mode);
3571 case BUILT_IN_STRCAT:
3572 target = expand_builtin_strcat (arglist, target, mode);
3577 case BUILT_IN_STRNCAT:
3578 target = expand_builtin_strncat (arglist, target, mode);
3583 case BUILT_IN_STRSPN:
3584 target = expand_builtin_strspn (arglist, target, mode);
3589 case BUILT_IN_STRCSPN:
3590 target = expand_builtin_strcspn (arglist, target, mode);
3595 case BUILT_IN_STRSTR:
3596 target = expand_builtin_strstr (arglist, target, mode);
3601 case BUILT_IN_STRPBRK:
3602 target = expand_builtin_strpbrk (arglist, target, mode);
3607 case BUILT_IN_INDEX:
3608 case BUILT_IN_STRCHR:
3609 target = expand_builtin_strchr (arglist, target, mode);
3614 case BUILT_IN_RINDEX:
3615 case BUILT_IN_STRRCHR:
3616 target = expand_builtin_strrchr (arglist, target, mode);
3621 case BUILT_IN_MEMCPY:
3622 target = expand_builtin_memcpy (arglist);
3627 case BUILT_IN_MEMSET:
3628 target = expand_builtin_memset (exp);
3633 case BUILT_IN_BZERO:
3634 target = expand_builtin_bzero (exp);
3639 case BUILT_IN_STRCMP:
3640 target = expand_builtin_strcmp (exp, target, mode);
3645 case BUILT_IN_STRNCMP:
3646 target = expand_builtin_strncmp (exp, target, mode);
3651 /* These comparison functions need an instruction that returns an actual
3652 index. An ordinary compare that just sets the condition codes
3654 #ifdef HAVE_cmpstrsi
3656 case BUILT_IN_MEMCMP:
3657 target = expand_builtin_memcmp (exp, arglist, target);
3663 case BUILT_IN_MEMCMP:
3667 case BUILT_IN_SETJMP:
3668 target = expand_builtin_setjmp (arglist, target);
3673 /* __builtin_longjmp is passed a pointer to an array of five words.
3674 It's similar to the C library longjmp function but works with
3675 __builtin_setjmp above. */
3676 case BUILT_IN_LONGJMP:
3677 if (!validate_arglist (arglist, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
3681 rtx buf_addr = expand_expr (TREE_VALUE (arglist), subtarget,
3683 rtx value = expand_expr (TREE_VALUE (TREE_CHAIN (arglist)),
3684 NULL_RTX, VOIDmode, 0);
3686 if (value != const1_rtx)
3688 error ("__builtin_longjmp second argument must be 1");
3692 expand_builtin_longjmp (buf_addr, value);
3699 emit_insn (gen_trap ());
3702 error ("__builtin_trap not supported by this target");
3706 case BUILT_IN_PUTCHAR:
3708 case BUILT_IN_FPUTC:
3709 case BUILT_IN_FWRITE:
3711 case BUILT_IN_FPUTS:
3712 target = expand_builtin_fputs (arglist, ignore);
3717 /* Various hooks for the DWARF 2 __throw routine. */
3718 case BUILT_IN_UNWIND_INIT:
3719 expand_builtin_unwind_init ();
3721 case BUILT_IN_DWARF_CFA:
3722 return virtual_cfa_rtx;
3723 #ifdef DWARF2_UNWIND_INFO
3724 case BUILT_IN_DWARF_FP_REGNUM:
3725 return expand_builtin_dwarf_fp_regnum ();
3726 case BUILT_IN_INIT_DWARF_REG_SIZES:
3727 expand_builtin_init_dwarf_reg_sizes (TREE_VALUE (arglist));
3730 case BUILT_IN_FROB_RETURN_ADDR:
3731 return expand_builtin_frob_return_addr (TREE_VALUE (arglist));
3732 case BUILT_IN_EXTRACT_RETURN_ADDR:
3733 return expand_builtin_extract_return_addr (TREE_VALUE (arglist));
3734 case BUILT_IN_EH_RETURN:
3735 expand_builtin_eh_return (TREE_VALUE (arglist),
3736 TREE_VALUE (TREE_CHAIN (arglist)));
3738 #ifdef EH_RETURN_DATA_REGNO
3739 case BUILT_IN_EH_RETURN_DATA_REGNO:
3740 return expand_builtin_eh_return_data_regno (arglist);
3742 case BUILT_IN_VARARGS_START:
3743 return expand_builtin_va_start (0, arglist);
3744 case BUILT_IN_STDARG_START:
3745 return expand_builtin_va_start (1, arglist);
3746 case BUILT_IN_VA_END:
3747 return expand_builtin_va_end (arglist);
3748 case BUILT_IN_VA_COPY:
3749 return expand_builtin_va_copy (arglist);
3750 case BUILT_IN_EXPECT:
3751 return expand_builtin_expect (arglist, target);
3753 default: /* just do library call, if unknown builtin */
3754 error ("built-in function `%s' not currently supported",
3755 IDENTIFIER_POINTER (DECL_NAME (fndecl)));
3758 /* The switch statement above can drop through to cause the function
3759 to be called normally. */
3760 return expand_call (exp, target, ignore);
3763 /* Fold a call to __builtin_constant_p, if we know it will evaluate to a
3764 constant. ARGLIST is the argument list of the call. */
3767 fold_builtin_constant_p (arglist)
3773 arglist = TREE_VALUE (arglist);
3775 /* We return 1 for a numeric type that's known to be a constant
3776 value at compile-time or for an aggregate type that's a
3777 literal constant. */
3778 STRIP_NOPS (arglist);
3780 /* If we know this is a constant, emit the constant of one. */
3781 if (TREE_CODE_CLASS (TREE_CODE (arglist)) == 'c'
3782 || (TREE_CODE (arglist) == CONSTRUCTOR
3783 && TREE_CONSTANT (arglist))
3784 || (TREE_CODE (arglist) == ADDR_EXPR
3785 && TREE_CODE (TREE_OPERAND (arglist, 0)) == STRING_CST))
3786 return integer_one_node;
3788 /* If we aren't going to be running CSE or this expression
3789 has side effects, show we don't know it to be a constant.
3790 Likewise if it's a pointer or aggregate type since in those
3791 case we only want literals, since those are only optimized
3792 when generating RTL, not later.
3793 And finally, if we are compiling an initializer, not code, we
3794 need to return a definite result now; there's not going to be any
3795 more optimization done. */
3796 if (TREE_SIDE_EFFECTS (arglist) || cse_not_expected
3797 || AGGREGATE_TYPE_P (TREE_TYPE (arglist))
3798 || POINTER_TYPE_P (TREE_TYPE (arglist))
3800 return integer_zero_node;
3805 /* Fold a call to __builtin_classify_type. */
3808 fold_builtin_classify_type (arglist)
3812 return build_int_2 (no_type_class, 0);
3814 return build_int_2 (type_to_class (TREE_TYPE (TREE_VALUE (arglist))), 0);
3817 /* Used by constant folding to eliminate some builtin calls early. EXP is
3818 the CALL_EXPR of a call to a builtin function. */
3824 tree fndecl = TREE_OPERAND (TREE_OPERAND (exp, 0), 0);
3825 tree arglist = TREE_OPERAND (exp, 1);
3826 enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl);
3828 if (DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_MD)
3833 case BUILT_IN_CONSTANT_P:
3834 return fold_builtin_constant_p (arglist);
3836 case BUILT_IN_CLASSIFY_TYPE:
3837 return fold_builtin_classify_type (arglist);
3839 case BUILT_IN_STRLEN:
3840 if (validate_arglist (arglist, POINTER_TYPE, VOID_TYPE))
3842 tree len = c_strlen (TREE_VALUE (arglist));
3856 build_function_call_expr (fn, arglist)
3861 call_expr = build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (fn)), fn);
3862 call_expr = build (CALL_EXPR, TREE_TYPE (TREE_TYPE (fn)),
3863 call_expr, arglist);
3864 TREE_SIDE_EFFECTS (call_expr) = 1;
3865 return fold (call_expr);
3868 /* This function validates the types of a function call argument list
3869 represented as a tree chain of parameters against a specified list
3870 of tree_codes. If the last specifier is a 0, that represents an
3871 ellipses, otherwise the last specifier must be a VOID_TYPE. */
3874 validate_arglist VPARAMS ((tree arglist, ...))
3876 enum tree_code code;
3879 VA_OPEN (ap, arglist);
3880 VA_FIXEDARG (ap, tree, arglist);
3883 code = va_arg (ap, enum tree_code);
3887 /* This signifies an ellipses, any further arguments are all ok. */
3891 /* This signifies an endlink, if no arguments remain, return
3892 true, otherwise return false. */
3896 /* If no parameters remain or the parameter's code does not
3897 match the specified code, return false. Otherwise continue
3898 checking any remaining arguments. */
3899 if (arglist == 0 || code != TREE_CODE (TREE_TYPE (TREE_VALUE (arglist))))
3903 arglist = TREE_CHAIN (arglist);
3906 /* We need gotos here since we can only have one VA_CLOSE in a
3914 /* Default version of target-specific builtin setup that does nothing. */
3917 default_init_builtins ()
3921 /* Default target-specific builtin expander that does nothing. */
3924 default_expand_builtin (exp, target, subtarget, mode, ignore)
3925 tree exp ATTRIBUTE_UNUSED;
3926 rtx target ATTRIBUTE_UNUSED;
3927 rtx subtarget ATTRIBUTE_UNUSED;
3928 enum machine_mode mode ATTRIBUTE_UNUSED;
3929 int ignore ATTRIBUTE_UNUSED;