1 /* Expand builtin functions.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
3 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
4 Free Software Foundation, Inc.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
24 #include "coretypes.h"
33 #include "hard-reg-set.h"
36 #include "insn-config.h"
42 #include "typeclass.h"
47 #include "langhooks.h"
48 #include "basic-block.h"
49 #include "tree-mudflap.h"
50 #include "tree-flow.h"
51 #include "value-prof.h"
52 #include "diagnostic.h"
54 #ifndef SLOW_UNALIGNED_ACCESS
55 #define SLOW_UNALIGNED_ACCESS(MODE, ALIGN) STRICT_ALIGNMENT
58 #ifndef PAD_VARARGS_DOWN
59 #define PAD_VARARGS_DOWN BYTES_BIG_ENDIAN
61 static tree do_mpc_arg1 (tree, tree, int (*)(mpc_ptr, mpc_srcptr, mpc_rnd_t));
63 /* Define the names of the builtin function types and codes. */
64 const char *const built_in_class_names[4]
65 = {"NOT_BUILT_IN", "BUILT_IN_FRONTEND", "BUILT_IN_MD", "BUILT_IN_NORMAL"};
67 #define DEF_BUILTIN(X, N, C, T, LT, B, F, NA, AT, IM, COND) #X,
68 const char * built_in_names[(int) END_BUILTINS] =
70 #include "builtins.def"
74 /* Setup an array of _DECL trees, make sure each element is
75 initialized to NULL_TREE. */
76 tree built_in_decls[(int) END_BUILTINS];
77 /* Declarations used when constructing the builtin implicitly in the compiler.
78 It may be NULL_TREE when this is invalid (for instance runtime is not
79 required to implement the function call in all cases). */
80 tree implicit_built_in_decls[(int) END_BUILTINS];
82 static const char *c_getstr (tree);
83 static rtx c_readstr (const char *, enum machine_mode);
84 static int target_char_cast (tree, char *);
85 static rtx get_memory_rtx (tree, tree);
86 static int apply_args_size (void);
87 static int apply_result_size (void);
88 #if defined (HAVE_untyped_call) || defined (HAVE_untyped_return)
89 static rtx result_vector (int, rtx);
91 static void expand_builtin_update_setjmp_buf (rtx);
92 static void expand_builtin_prefetch (tree);
93 static rtx expand_builtin_apply_args (void);
94 static rtx expand_builtin_apply_args_1 (void);
95 static rtx expand_builtin_apply (rtx, rtx, rtx);
96 static void expand_builtin_return (rtx);
97 static enum type_class type_to_class (tree);
98 static rtx expand_builtin_classify_type (tree);
99 static void expand_errno_check (tree, rtx);
100 static rtx expand_builtin_mathfn (tree, rtx, rtx);
101 static rtx expand_builtin_mathfn_2 (tree, rtx, rtx);
102 static rtx expand_builtin_mathfn_3 (tree, rtx, rtx);
103 static rtx expand_builtin_interclass_mathfn (tree, rtx, rtx);
104 static rtx expand_builtin_sincos (tree);
105 static rtx expand_builtin_cexpi (tree, rtx, rtx);
106 static rtx expand_builtin_int_roundingfn (tree, rtx);
107 static rtx expand_builtin_int_roundingfn_2 (tree, rtx);
108 static rtx expand_builtin_args_info (tree);
109 static rtx expand_builtin_next_arg (void);
110 static rtx expand_builtin_va_start (tree);
111 static rtx expand_builtin_va_end (tree);
112 static rtx expand_builtin_va_copy (tree);
113 static rtx expand_builtin_memcmp (tree, rtx, enum machine_mode);
114 static rtx expand_builtin_strcmp (tree, rtx);
115 static rtx expand_builtin_strncmp (tree, rtx, enum machine_mode);
116 static rtx builtin_memcpy_read_str (void *, HOST_WIDE_INT, enum machine_mode);
117 static rtx expand_builtin_memcpy (tree, rtx);
118 static rtx expand_builtin_mempcpy (tree, rtx, enum machine_mode);
119 static rtx expand_builtin_mempcpy_args (tree, tree, tree, rtx,
120 enum machine_mode, int);
121 static rtx expand_builtin_strcpy (tree, rtx);
122 static rtx expand_builtin_strcpy_args (tree, tree, rtx);
123 static rtx expand_builtin_stpcpy (tree, rtx, enum machine_mode);
124 static rtx expand_builtin_strncpy (tree, rtx);
125 static rtx builtin_memset_gen_str (void *, HOST_WIDE_INT, enum machine_mode);
126 static rtx expand_builtin_memset (tree, rtx, enum machine_mode);
127 static rtx expand_builtin_memset_args (tree, tree, tree, rtx, enum machine_mode, tree);
128 static rtx expand_builtin_bzero (tree);
129 static rtx expand_builtin_strlen (tree, rtx, enum machine_mode);
130 static rtx expand_builtin_alloca (tree, rtx);
131 static rtx expand_builtin_unop (enum machine_mode, tree, rtx, rtx, optab);
132 static rtx expand_builtin_frame_address (tree, tree);
133 static tree stabilize_va_list_loc (location_t, tree, int);
134 static rtx expand_builtin_expect (tree, rtx);
135 static tree fold_builtin_constant_p (tree);
136 static tree fold_builtin_expect (location_t, tree, tree);
137 static tree fold_builtin_classify_type (tree);
138 static tree fold_builtin_strlen (location_t, tree, tree);
139 static tree fold_builtin_inf (location_t, tree, int);
140 static tree fold_builtin_nan (tree, tree, int);
141 static tree rewrite_call_expr (location_t, tree, int, tree, int, ...);
142 static bool validate_arg (const_tree, enum tree_code code);
143 static bool integer_valued_real_p (tree);
144 static tree fold_trunc_transparent_mathfn (location_t, tree, tree);
145 static bool readonly_data_expr (tree);
146 static rtx expand_builtin_fabs (tree, rtx, rtx);
147 static rtx expand_builtin_signbit (tree, rtx);
148 static tree fold_builtin_sqrt (location_t, tree, tree);
149 static tree fold_builtin_cbrt (location_t, tree, tree);
150 static tree fold_builtin_pow (location_t, tree, tree, tree, tree);
151 static tree fold_builtin_powi (location_t, tree, tree, tree, tree);
152 static tree fold_builtin_cos (location_t, tree, tree, tree);
153 static tree fold_builtin_cosh (location_t, tree, tree, tree);
154 static tree fold_builtin_tan (tree, tree);
155 static tree fold_builtin_trunc (location_t, tree, tree);
156 static tree fold_builtin_floor (location_t, tree, tree);
157 static tree fold_builtin_ceil (location_t, tree, tree);
158 static tree fold_builtin_round (location_t, tree, tree);
159 static tree fold_builtin_int_roundingfn (location_t, tree, tree);
160 static tree fold_builtin_bitop (tree, tree);
161 static tree fold_builtin_memory_op (location_t, tree, tree, tree, tree, bool, int);
162 static tree fold_builtin_strchr (location_t, tree, tree, tree);
163 static tree fold_builtin_memchr (location_t, tree, tree, tree, tree);
164 static tree fold_builtin_memcmp (location_t, tree, tree, tree);
165 static tree fold_builtin_strcmp (location_t, tree, tree);
166 static tree fold_builtin_strncmp (location_t, tree, tree, tree);
167 static tree fold_builtin_signbit (location_t, tree, tree);
168 static tree fold_builtin_copysign (location_t, tree, tree, tree, tree);
169 static tree fold_builtin_isascii (location_t, tree);
170 static tree fold_builtin_toascii (location_t, tree);
171 static tree fold_builtin_isdigit (location_t, tree);
172 static tree fold_builtin_fabs (location_t, tree, tree);
173 static tree fold_builtin_abs (location_t, tree, tree);
174 static tree fold_builtin_unordered_cmp (location_t, tree, tree, tree, enum tree_code,
176 static tree fold_builtin_n (location_t, tree, tree *, int, bool);
177 static tree fold_builtin_0 (location_t, tree, bool);
178 static tree fold_builtin_1 (location_t, tree, tree, bool);
179 static tree fold_builtin_2 (location_t, tree, tree, tree, bool);
180 static tree fold_builtin_3 (location_t, tree, tree, tree, tree, bool);
181 static tree fold_builtin_4 (location_t, tree, tree, tree, tree, tree, bool);
182 static tree fold_builtin_varargs (location_t, tree, tree, bool);
184 static tree fold_builtin_strpbrk (location_t, tree, tree, tree);
185 static tree fold_builtin_strstr (location_t, tree, tree, tree);
186 static tree fold_builtin_strrchr (location_t, tree, tree, tree);
187 static tree fold_builtin_strcat (location_t, tree, tree);
188 static tree fold_builtin_strncat (location_t, tree, tree, tree);
189 static tree fold_builtin_strspn (location_t, tree, tree);
190 static tree fold_builtin_strcspn (location_t, tree, tree);
191 static tree fold_builtin_sprintf (location_t, tree, tree, tree, int);
193 static rtx expand_builtin_object_size (tree);
194 static rtx expand_builtin_memory_chk (tree, rtx, enum machine_mode,
195 enum built_in_function);
196 static void maybe_emit_chk_warning (tree, enum built_in_function);
197 static void maybe_emit_sprintf_chk_warning (tree, enum built_in_function);
198 static void maybe_emit_free_warning (tree);
199 static tree fold_builtin_object_size (tree, tree);
200 static tree fold_builtin_strcat_chk (location_t, tree, tree, tree, tree);
201 static tree fold_builtin_strncat_chk (location_t, tree, tree, tree, tree, tree);
202 static tree fold_builtin_sprintf_chk (location_t, tree, enum built_in_function);
203 static tree fold_builtin_printf (location_t, tree, tree, tree, bool, enum built_in_function);
204 static tree fold_builtin_fprintf (location_t, tree, tree, tree, tree, bool,
205 enum built_in_function);
206 static bool init_target_chars (void);
208 static unsigned HOST_WIDE_INT target_newline;
209 static unsigned HOST_WIDE_INT target_percent;
210 static unsigned HOST_WIDE_INT target_c;
211 static unsigned HOST_WIDE_INT target_s;
212 static char target_percent_c[3];
213 static char target_percent_s[3];
214 static char target_percent_s_newline[4];
215 static tree do_mpfr_arg1 (tree, tree, int (*)(mpfr_ptr, mpfr_srcptr, mp_rnd_t),
216 const REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *, bool);
217 static tree do_mpfr_arg2 (tree, tree, tree,
218 int (*)(mpfr_ptr, mpfr_srcptr, mpfr_srcptr, mp_rnd_t));
219 static tree do_mpfr_arg3 (tree, tree, tree, tree,
220 int (*)(mpfr_ptr, mpfr_srcptr, mpfr_srcptr, mpfr_srcptr, mp_rnd_t));
221 static tree do_mpfr_sincos (tree, tree, tree);
222 static tree do_mpfr_bessel_n (tree, tree, tree,
223 int (*)(mpfr_ptr, long, mpfr_srcptr, mp_rnd_t),
224 const REAL_VALUE_TYPE *, bool);
225 static tree do_mpfr_remquo (tree, tree, tree);
226 static tree do_mpfr_lgamma_r (tree, tree, tree);
228 /* Return true if NAME starts with __builtin_ or __sync_. */
231 is_builtin_name (const char *name)
233 if (strncmp (name, "__builtin_", 10) == 0)
235 if (strncmp (name, "__sync_", 7) == 0)
241 /* Return true if DECL is a function symbol representing a built-in. */
244 is_builtin_fn (tree decl)
246 return TREE_CODE (decl) == FUNCTION_DECL && DECL_BUILT_IN (decl);
250 /* Return true if NODE should be considered for inline expansion regardless
251 of the optimization level. This means whenever a function is invoked with
252 its "internal" name, which normally contains the prefix "__builtin". */
255 called_as_built_in (tree node)
257 /* Note that we must use DECL_NAME, not DECL_ASSEMBLER_NAME_SET_P since
258 we want the name used to call the function, not the name it
260 const char *name = IDENTIFIER_POINTER (DECL_NAME (node));
261 return is_builtin_name (name);
264 /* Return the alignment in bits of EXP, an object.
265 Don't return more than MAX_ALIGN no matter what, ALIGN is the inital
266 guessed alignment e.g. from type alignment. */
269 get_object_alignment (tree exp, unsigned int align, unsigned int max_align)
274 if (handled_component_p (exp))
276 HOST_WIDE_INT bitsize, bitpos;
278 enum machine_mode mode;
279 int unsignedp, volatilep;
281 exp = get_inner_reference (exp, &bitsize, &bitpos, &offset,
282 &mode, &unsignedp, &volatilep, true);
284 inner = MIN (inner, (unsigned) (bitpos & -bitpos));
289 if (TREE_CODE (offset) == PLUS_EXPR)
291 next_offset = TREE_OPERAND (offset, 0);
292 offset = TREE_OPERAND (offset, 1);
296 if (host_integerp (offset, 1))
298 /* Any overflow in calculating offset_bits won't change
301 = ((unsigned) tree_low_cst (offset, 1) * BITS_PER_UNIT);
304 inner = MIN (inner, (offset_bits & -offset_bits));
306 else if (TREE_CODE (offset) == MULT_EXPR
307 && host_integerp (TREE_OPERAND (offset, 1), 1))
309 /* Any overflow in calculating offset_factor won't change
311 unsigned offset_factor
312 = ((unsigned) tree_low_cst (TREE_OPERAND (offset, 1), 1)
316 inner = MIN (inner, (offset_factor & -offset_factor));
320 inner = MIN (inner, BITS_PER_UNIT);
323 offset = next_offset;
326 if (TREE_CODE (exp) == CONST_DECL)
327 exp = DECL_INITIAL (exp);
329 && TREE_CODE (exp) != LABEL_DECL)
330 align = MIN (inner, DECL_ALIGN (exp));
331 #ifdef CONSTANT_ALIGNMENT
332 else if (CONSTANT_CLASS_P (exp))
333 align = MIN (inner, (unsigned)CONSTANT_ALIGNMENT (exp, align));
335 else if (TREE_CODE (exp) == VIEW_CONVERT_EXPR
336 || TREE_CODE (exp) == INDIRECT_REF)
337 align = MIN (TYPE_ALIGN (TREE_TYPE (exp)), inner);
339 align = MIN (align, inner);
340 return MIN (align, max_align);
343 /* Returns true iff we can trust that alignment information has been
344 calculated properly. */
347 can_trust_pointer_alignment (void)
349 /* We rely on TER to compute accurate alignment information. */
350 return (optimize && flag_tree_ter);
353 /* Return the alignment in bits of EXP, a pointer valued expression.
354 But don't return more than MAX_ALIGN no matter what.
355 The alignment returned is, by default, the alignment of the thing that
356 EXP points to. If it is not a POINTER_TYPE, 0 is returned.
358 Otherwise, look at the expression to see if we can do better, i.e., if the
359 expression is actually pointing at an object whose alignment is tighter. */
362 get_pointer_alignment (tree exp, unsigned int max_align)
364 unsigned int align, inner;
366 if (!can_trust_pointer_alignment ())
369 if (!POINTER_TYPE_P (TREE_TYPE (exp)))
372 align = TYPE_ALIGN (TREE_TYPE (TREE_TYPE (exp)));
373 align = MIN (align, max_align);
377 switch (TREE_CODE (exp))
380 exp = TREE_OPERAND (exp, 0);
381 if (! POINTER_TYPE_P (TREE_TYPE (exp)))
384 inner = TYPE_ALIGN (TREE_TYPE (TREE_TYPE (exp)));
385 align = MIN (inner, max_align);
388 case POINTER_PLUS_EXPR:
389 /* If sum of pointer + int, restrict our maximum alignment to that
390 imposed by the integer. If not, we can't do any better than
392 if (! host_integerp (TREE_OPERAND (exp, 1), 1))
395 while (((tree_low_cst (TREE_OPERAND (exp, 1), 1))
396 & (max_align / BITS_PER_UNIT - 1))
400 exp = TREE_OPERAND (exp, 0);
404 /* See what we are pointing at and look at its alignment. */
405 return get_object_alignment (TREE_OPERAND (exp, 0), align, max_align);
413 /* Compute the length of a C string. TREE_STRING_LENGTH is not the right
414 way, because it could contain a zero byte in the middle.
415 TREE_STRING_LENGTH is the size of the character array, not the string.
417 ONLY_VALUE should be nonzero if the result is not going to be emitted
418 into the instruction stream and zero if it is going to be expanded.
419 E.g. with i++ ? "foo" : "bar", if ONLY_VALUE is nonzero, constant 3
420 is returned, otherwise NULL, since
421 len = c_strlen (src, 1); if (len) expand_expr (len, ...); would not
422 evaluate the side-effects.
424 The value returned is of type `ssizetype'.
426 Unfortunately, string_constant can't access the values of const char
427 arrays with initializers, so neither can we do so here. */
430 c_strlen (tree src, int only_value)
433 HOST_WIDE_INT offset;
439 if (TREE_CODE (src) == COND_EXPR
440 && (only_value || !TREE_SIDE_EFFECTS (TREE_OPERAND (src, 0))))
444 len1 = c_strlen (TREE_OPERAND (src, 1), only_value);
445 len2 = c_strlen (TREE_OPERAND (src, 2), only_value);
446 if (tree_int_cst_equal (len1, len2))
450 if (TREE_CODE (src) == COMPOUND_EXPR
451 && (only_value || !TREE_SIDE_EFFECTS (TREE_OPERAND (src, 0))))
452 return c_strlen (TREE_OPERAND (src, 1), only_value);
454 if (EXPR_HAS_LOCATION (src))
455 loc = EXPR_LOCATION (src);
457 loc = input_location;
459 src = string_constant (src, &offset_node);
463 max = TREE_STRING_LENGTH (src) - 1;
464 ptr = TREE_STRING_POINTER (src);
466 if (offset_node && TREE_CODE (offset_node) != INTEGER_CST)
468 /* If the string has an internal zero byte (e.g., "foo\0bar"), we can't
469 compute the offset to the following null if we don't know where to
470 start searching for it. */
473 for (i = 0; i < max; i++)
477 /* We don't know the starting offset, but we do know that the string
478 has no internal zero bytes. We can assume that the offset falls
479 within the bounds of the string; otherwise, the programmer deserves
480 what he gets. Subtract the offset from the length of the string,
481 and return that. This would perhaps not be valid if we were dealing
482 with named arrays in addition to literal string constants. */
484 return size_diffop_loc (loc, size_int (max), offset_node);
487 /* We have a known offset into the string. Start searching there for
488 a null character if we can represent it as a single HOST_WIDE_INT. */
489 if (offset_node == 0)
491 else if (! host_integerp (offset_node, 0))
494 offset = tree_low_cst (offset_node, 0);
496 /* If the offset is known to be out of bounds, warn, and call strlen at
498 if (offset < 0 || offset > max)
500 /* Suppress multiple warnings for propagated constant strings. */
501 if (! TREE_NO_WARNING (src))
503 warning_at (loc, 0, "offset outside bounds of constant string");
504 TREE_NO_WARNING (src) = 1;
509 /* Use strlen to search for the first zero byte. Since any strings
510 constructed with build_string will have nulls appended, we win even
511 if we get handed something like (char[4])"abcd".
513 Since OFFSET is our starting index into the string, no further
514 calculation is needed. */
515 return ssize_int (strlen (ptr + offset));
518 /* Return a char pointer for a C string if it is a string constant
519 or sum of string constant and integer constant. */
526 src = string_constant (src, &offset_node);
530 if (offset_node == 0)
531 return TREE_STRING_POINTER (src);
532 else if (!host_integerp (offset_node, 1)
533 || compare_tree_int (offset_node, TREE_STRING_LENGTH (src) - 1) > 0)
536 return TREE_STRING_POINTER (src) + tree_low_cst (offset_node, 1);
539 /* Return a CONST_INT or CONST_DOUBLE corresponding to target reading
540 GET_MODE_BITSIZE (MODE) bits from string constant STR. */
543 c_readstr (const char *str, enum machine_mode mode)
549 gcc_assert (GET_MODE_CLASS (mode) == MODE_INT);
554 for (i = 0; i < GET_MODE_SIZE (mode); i++)
557 if (WORDS_BIG_ENDIAN)
558 j = GET_MODE_SIZE (mode) - i - 1;
559 if (BYTES_BIG_ENDIAN != WORDS_BIG_ENDIAN
560 && GET_MODE_SIZE (mode) > UNITS_PER_WORD)
561 j = j + UNITS_PER_WORD - 2 * (j % UNITS_PER_WORD) - 1;
563 gcc_assert (j < 2 * HOST_BITS_PER_WIDE_INT);
566 ch = (unsigned char) str[i];
567 c[j / HOST_BITS_PER_WIDE_INT] |= ch << (j % HOST_BITS_PER_WIDE_INT);
569 return immed_double_const (c[0], c[1], mode);
572 /* Cast a target constant CST to target CHAR and if that value fits into
573 host char type, return zero and put that value into variable pointed to by
577 target_char_cast (tree cst, char *p)
579 unsigned HOST_WIDE_INT val, hostval;
581 if (!host_integerp (cst, 1)
582 || CHAR_TYPE_SIZE > HOST_BITS_PER_WIDE_INT)
585 val = tree_low_cst (cst, 1);
586 if (CHAR_TYPE_SIZE < HOST_BITS_PER_WIDE_INT)
587 val &= (((unsigned HOST_WIDE_INT) 1) << CHAR_TYPE_SIZE) - 1;
590 if (HOST_BITS_PER_CHAR < HOST_BITS_PER_WIDE_INT)
591 hostval &= (((unsigned HOST_WIDE_INT) 1) << HOST_BITS_PER_CHAR) - 1;
600 /* Similar to save_expr, but assumes that arbitrary code is not executed
601 in between the multiple evaluations. In particular, we assume that a
602 non-addressable local variable will not be modified. */
605 builtin_save_expr (tree exp)
607 if (TREE_ADDRESSABLE (exp) == 0
608 && (TREE_CODE (exp) == PARM_DECL
609 || (TREE_CODE (exp) == VAR_DECL && !TREE_STATIC (exp))))
612 return save_expr (exp);
615 /* Given TEM, a pointer to a stack frame, follow the dynamic chain COUNT
616 times to get the address of either a higher stack frame, or a return
617 address located within it (depending on FNDECL_CODE). */
620 expand_builtin_return_addr (enum built_in_function fndecl_code, int count)
624 #ifdef INITIAL_FRAME_ADDRESS_RTX
625 rtx tem = INITIAL_FRAME_ADDRESS_RTX;
629 /* For a zero count with __builtin_return_address, we don't care what
630 frame address we return, because target-specific definitions will
631 override us. Therefore frame pointer elimination is OK, and using
632 the soft frame pointer is OK.
634 For a nonzero count, or a zero count with __builtin_frame_address,
635 we require a stable offset from the current frame pointer to the
636 previous one, so we must use the hard frame pointer, and
637 we must disable frame pointer elimination. */
638 if (count == 0 && fndecl_code == BUILT_IN_RETURN_ADDRESS)
639 tem = frame_pointer_rtx;
642 tem = hard_frame_pointer_rtx;
644 /* Tell reload not to eliminate the frame pointer. */
645 crtl->accesses_prior_frames = 1;
649 /* Some machines need special handling before we can access
650 arbitrary frames. For example, on the SPARC, we must first flush
651 all register windows to the stack. */
652 #ifdef SETUP_FRAME_ADDRESSES
654 SETUP_FRAME_ADDRESSES ();
657 /* On the SPARC, the return address is not in the frame, it is in a
658 register. There is no way to access it off of the current frame
659 pointer, but it can be accessed off the previous frame pointer by
660 reading the value from the register window save area. */
661 #ifdef RETURN_ADDR_IN_PREVIOUS_FRAME
662 if (fndecl_code == BUILT_IN_RETURN_ADDRESS)
666 /* Scan back COUNT frames to the specified frame. */
667 for (i = 0; i < count; i++)
669 /* Assume the dynamic chain pointer is in the word that the
670 frame address points to, unless otherwise specified. */
671 #ifdef DYNAMIC_CHAIN_ADDRESS
672 tem = DYNAMIC_CHAIN_ADDRESS (tem);
674 tem = memory_address (Pmode, tem);
675 tem = gen_frame_mem (Pmode, tem);
676 tem = copy_to_reg (tem);
679 /* For __builtin_frame_address, return what we've got. But, on
680 the SPARC for example, we may have to add a bias. */
681 if (fndecl_code == BUILT_IN_FRAME_ADDRESS)
682 #ifdef FRAME_ADDR_RTX
683 return FRAME_ADDR_RTX (tem);
688 /* For __builtin_return_address, get the return address from that frame. */
689 #ifdef RETURN_ADDR_RTX
690 tem = RETURN_ADDR_RTX (count, tem);
692 tem = memory_address (Pmode,
693 plus_constant (tem, GET_MODE_SIZE (Pmode)));
694 tem = gen_frame_mem (Pmode, tem);
699 /* Alias set used for setjmp buffer. */
700 static alias_set_type setjmp_alias_set = -1;
702 /* Construct the leading half of a __builtin_setjmp call. Control will
703 return to RECEIVER_LABEL. This is also called directly by the SJLJ
704 exception handling code. */
707 expand_builtin_setjmp_setup (rtx buf_addr, rtx receiver_label)
709 enum machine_mode sa_mode = STACK_SAVEAREA_MODE (SAVE_NONLOCAL);
713 if (setjmp_alias_set == -1)
714 setjmp_alias_set = new_alias_set ();
716 buf_addr = convert_memory_address (Pmode, buf_addr);
718 buf_addr = force_reg (Pmode, force_operand (buf_addr, NULL_RTX));
720 /* We store the frame pointer and the address of receiver_label in
721 the buffer and use the rest of it for the stack save area, which
722 is machine-dependent. */
724 mem = gen_rtx_MEM (Pmode, buf_addr);
725 set_mem_alias_set (mem, setjmp_alias_set);
726 emit_move_insn (mem, targetm.builtin_setjmp_frame_value ());
728 mem = gen_rtx_MEM (Pmode, plus_constant (buf_addr, GET_MODE_SIZE (Pmode))),
729 set_mem_alias_set (mem, setjmp_alias_set);
731 emit_move_insn (validize_mem (mem),
732 force_reg (Pmode, gen_rtx_LABEL_REF (Pmode, receiver_label)));
734 stack_save = gen_rtx_MEM (sa_mode,
735 plus_constant (buf_addr,
736 2 * GET_MODE_SIZE (Pmode)));
737 set_mem_alias_set (stack_save, setjmp_alias_set);
738 emit_stack_save (SAVE_NONLOCAL, &stack_save, NULL_RTX);
740 /* If there is further processing to do, do it. */
741 #ifdef HAVE_builtin_setjmp_setup
742 if (HAVE_builtin_setjmp_setup)
743 emit_insn (gen_builtin_setjmp_setup (buf_addr));
746 /* Tell optimize_save_area_alloca that extra work is going to
747 need to go on during alloca. */
748 cfun->calls_setjmp = 1;
750 /* We have a nonlocal label. */
751 cfun->has_nonlocal_label = 1;
754 /* Construct the trailing part of a __builtin_setjmp call. This is
755 also called directly by the SJLJ exception handling code. */
758 expand_builtin_setjmp_receiver (rtx receiver_label ATTRIBUTE_UNUSED)
762 /* Clobber the FP when we get here, so we have to make sure it's
763 marked as used by this function. */
764 emit_use (hard_frame_pointer_rtx);
766 /* Mark the static chain as clobbered here so life information
767 doesn't get messed up for it. */
768 chain = targetm.calls.static_chain (current_function_decl, true);
769 if (chain && REG_P (chain))
770 emit_clobber (chain);
772 /* Now put in the code to restore the frame pointer, and argument
773 pointer, if needed. */
774 #ifdef HAVE_nonlocal_goto
775 if (! HAVE_nonlocal_goto)
778 emit_move_insn (virtual_stack_vars_rtx, hard_frame_pointer_rtx);
779 /* This might change the hard frame pointer in ways that aren't
780 apparent to early optimization passes, so force a clobber. */
781 emit_clobber (hard_frame_pointer_rtx);
784 #if ARG_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
785 if (fixed_regs[ARG_POINTER_REGNUM])
787 #ifdef ELIMINABLE_REGS
789 static const struct elims {const int from, to;} elim_regs[] = ELIMINABLE_REGS;
791 for (i = 0; i < ARRAY_SIZE (elim_regs); i++)
792 if (elim_regs[i].from == ARG_POINTER_REGNUM
793 && elim_regs[i].to == HARD_FRAME_POINTER_REGNUM)
796 if (i == ARRAY_SIZE (elim_regs))
799 /* Now restore our arg pointer from the address at which it
800 was saved in our stack frame. */
801 emit_move_insn (crtl->args.internal_arg_pointer,
802 copy_to_reg (get_arg_pointer_save_area ()));
807 #ifdef HAVE_builtin_setjmp_receiver
808 if (HAVE_builtin_setjmp_receiver)
809 emit_insn (gen_builtin_setjmp_receiver (receiver_label));
812 #ifdef HAVE_nonlocal_goto_receiver
813 if (HAVE_nonlocal_goto_receiver)
814 emit_insn (gen_nonlocal_goto_receiver ());
819 /* We must not allow the code we just generated to be reordered by
820 scheduling. Specifically, the update of the frame pointer must
821 happen immediately, not later. */
822 emit_insn (gen_blockage ());
825 /* __builtin_longjmp is passed a pointer to an array of five words (not
826 all will be used on all machines). It operates similarly to the C
827 library function of the same name, but is more efficient. Much of
828 the code below is copied from the handling of non-local gotos. */
831 expand_builtin_longjmp (rtx buf_addr, rtx value)
833 rtx fp, lab, stack, insn, last;
834 enum machine_mode sa_mode = STACK_SAVEAREA_MODE (SAVE_NONLOCAL);
836 /* DRAP is needed for stack realign if longjmp is expanded to current
838 if (SUPPORTS_STACK_ALIGNMENT)
839 crtl->need_drap = true;
841 if (setjmp_alias_set == -1)
842 setjmp_alias_set = new_alias_set ();
844 buf_addr = convert_memory_address (Pmode, buf_addr);
846 buf_addr = force_reg (Pmode, buf_addr);
848 /* We require that the user must pass a second argument of 1, because
849 that is what builtin_setjmp will return. */
850 gcc_assert (value == const1_rtx);
852 last = get_last_insn ();
853 #ifdef HAVE_builtin_longjmp
854 if (HAVE_builtin_longjmp)
855 emit_insn (gen_builtin_longjmp (buf_addr));
859 fp = gen_rtx_MEM (Pmode, buf_addr);
860 lab = gen_rtx_MEM (Pmode, plus_constant (buf_addr,
861 GET_MODE_SIZE (Pmode)));
863 stack = gen_rtx_MEM (sa_mode, plus_constant (buf_addr,
864 2 * GET_MODE_SIZE (Pmode)));
865 set_mem_alias_set (fp, setjmp_alias_set);
866 set_mem_alias_set (lab, setjmp_alias_set);
867 set_mem_alias_set (stack, setjmp_alias_set);
869 /* Pick up FP, label, and SP from the block and jump. This code is
870 from expand_goto in stmt.c; see there for detailed comments. */
871 #ifdef HAVE_nonlocal_goto
872 if (HAVE_nonlocal_goto)
873 /* We have to pass a value to the nonlocal_goto pattern that will
874 get copied into the static_chain pointer, but it does not matter
875 what that value is, because builtin_setjmp does not use it. */
876 emit_insn (gen_nonlocal_goto (value, lab, stack, fp));
880 lab = copy_to_reg (lab);
882 emit_clobber (gen_rtx_MEM (BLKmode, gen_rtx_SCRATCH (VOIDmode)));
883 emit_clobber (gen_rtx_MEM (BLKmode, hard_frame_pointer_rtx));
885 emit_move_insn (hard_frame_pointer_rtx, fp);
886 emit_stack_restore (SAVE_NONLOCAL, stack, NULL_RTX);
888 emit_use (hard_frame_pointer_rtx);
889 emit_use (stack_pointer_rtx);
890 emit_indirect_jump (lab);
894 /* Search backwards and mark the jump insn as a non-local goto.
895 Note that this precludes the use of __builtin_longjmp to a
896 __builtin_setjmp target in the same function. However, we've
897 already cautioned the user that these functions are for
898 internal exception handling use only. */
899 for (insn = get_last_insn (); insn; insn = PREV_INSN (insn))
901 gcc_assert (insn != last);
905 add_reg_note (insn, REG_NON_LOCAL_GOTO, const0_rtx);
908 else if (CALL_P (insn))
913 /* Expand a call to __builtin_nonlocal_goto. We're passed the target label
914 and the address of the save area. */
917 expand_builtin_nonlocal_goto (tree exp)
919 tree t_label, t_save_area;
920 rtx r_label, r_save_area, r_fp, r_sp, insn;
922 if (!validate_arglist (exp, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
925 t_label = CALL_EXPR_ARG (exp, 0);
926 t_save_area = CALL_EXPR_ARG (exp, 1);
928 r_label = expand_normal (t_label);
929 r_label = convert_memory_address (Pmode, r_label);
930 r_save_area = expand_normal (t_save_area);
931 r_save_area = convert_memory_address (Pmode, r_save_area);
932 /* Copy the address of the save location to a register just in case it was based
933 on the frame pointer. */
934 r_save_area = copy_to_reg (r_save_area);
935 r_fp = gen_rtx_MEM (Pmode, r_save_area);
936 r_sp = gen_rtx_MEM (STACK_SAVEAREA_MODE (SAVE_NONLOCAL),
937 plus_constant (r_save_area, GET_MODE_SIZE (Pmode)));
939 crtl->has_nonlocal_goto = 1;
941 #ifdef HAVE_nonlocal_goto
942 /* ??? We no longer need to pass the static chain value, afaik. */
943 if (HAVE_nonlocal_goto)
944 emit_insn (gen_nonlocal_goto (const0_rtx, r_label, r_sp, r_fp));
948 r_label = copy_to_reg (r_label);
950 emit_clobber (gen_rtx_MEM (BLKmode, gen_rtx_SCRATCH (VOIDmode)));
951 emit_clobber (gen_rtx_MEM (BLKmode, hard_frame_pointer_rtx));
953 /* Restore frame pointer for containing function.
954 This sets the actual hard register used for the frame pointer
955 to the location of the function's incoming static chain info.
956 The non-local goto handler will then adjust it to contain the
957 proper value and reload the argument pointer, if needed. */
958 emit_move_insn (hard_frame_pointer_rtx, r_fp);
959 emit_stack_restore (SAVE_NONLOCAL, r_sp, NULL_RTX);
961 /* USE of hard_frame_pointer_rtx added for consistency;
962 not clear if really needed. */
963 emit_use (hard_frame_pointer_rtx);
964 emit_use (stack_pointer_rtx);
966 /* If the architecture is using a GP register, we must
967 conservatively assume that the target function makes use of it.
968 The prologue of functions with nonlocal gotos must therefore
969 initialize the GP register to the appropriate value, and we
970 must then make sure that this value is live at the point
971 of the jump. (Note that this doesn't necessarily apply
972 to targets with a nonlocal_goto pattern; they are free
973 to implement it in their own way. Note also that this is
974 a no-op if the GP register is a global invariant.) */
975 if ((unsigned) PIC_OFFSET_TABLE_REGNUM != INVALID_REGNUM
976 && fixed_regs[PIC_OFFSET_TABLE_REGNUM])
977 emit_use (pic_offset_table_rtx);
979 emit_indirect_jump (r_label);
982 /* Search backwards to the jump insn and mark it as a
984 for (insn = get_last_insn (); insn; insn = PREV_INSN (insn))
988 add_reg_note (insn, REG_NON_LOCAL_GOTO, const0_rtx);
991 else if (CALL_P (insn))
998 /* __builtin_update_setjmp_buf is passed a pointer to an array of five words
999 (not all will be used on all machines) that was passed to __builtin_setjmp.
1000 It updates the stack pointer in that block to correspond to the current
1004 expand_builtin_update_setjmp_buf (rtx buf_addr)
1006 enum machine_mode sa_mode = Pmode;
1010 #ifdef HAVE_save_stack_nonlocal
1011 if (HAVE_save_stack_nonlocal)
1012 sa_mode = insn_data[(int) CODE_FOR_save_stack_nonlocal].operand[0].mode;
1014 #ifdef STACK_SAVEAREA_MODE
1015 sa_mode = STACK_SAVEAREA_MODE (SAVE_NONLOCAL);
1019 = gen_rtx_MEM (sa_mode,
1022 plus_constant (buf_addr, 2 * GET_MODE_SIZE (Pmode))));
1026 emit_insn (gen_setjmp ());
1029 emit_stack_save (SAVE_NONLOCAL, &stack_save, NULL_RTX);
1032 /* Expand a call to __builtin_prefetch. For a target that does not support
1033 data prefetch, evaluate the memory address argument in case it has side
1037 expand_builtin_prefetch (tree exp)
1039 tree arg0, arg1, arg2;
1043 if (!validate_arglist (exp, POINTER_TYPE, 0))
1046 arg0 = CALL_EXPR_ARG (exp, 0);
1048 /* Arguments 1 and 2 are optional; argument 1 (read/write) defaults to
1049 zero (read) and argument 2 (locality) defaults to 3 (high degree of
1051 nargs = call_expr_nargs (exp);
1053 arg1 = CALL_EXPR_ARG (exp, 1);
1055 arg1 = integer_zero_node;
1057 arg2 = CALL_EXPR_ARG (exp, 2);
1059 arg2 = build_int_cst (NULL_TREE, 3);
1061 /* Argument 0 is an address. */
1062 op0 = expand_expr (arg0, NULL_RTX, Pmode, EXPAND_NORMAL);
1064 /* Argument 1 (read/write flag) must be a compile-time constant int. */
1065 if (TREE_CODE (arg1) != INTEGER_CST)
1067 error ("second argument to %<__builtin_prefetch%> must be a constant");
1068 arg1 = integer_zero_node;
1070 op1 = expand_normal (arg1);
1071 /* Argument 1 must be either zero or one. */
1072 if (INTVAL (op1) != 0 && INTVAL (op1) != 1)
1074 warning (0, "invalid second argument to %<__builtin_prefetch%>;"
1079 /* Argument 2 (locality) must be a compile-time constant int. */
1080 if (TREE_CODE (arg2) != INTEGER_CST)
1082 error ("third argument to %<__builtin_prefetch%> must be a constant");
1083 arg2 = integer_zero_node;
1085 op2 = expand_normal (arg2);
1086 /* Argument 2 must be 0, 1, 2, or 3. */
1087 if (INTVAL (op2) < 0 || INTVAL (op2) > 3)
1089 warning (0, "invalid third argument to %<__builtin_prefetch%>; using zero");
1093 #ifdef HAVE_prefetch
1096 if ((! (*insn_data[(int) CODE_FOR_prefetch].operand[0].predicate)
1098 insn_data[(int) CODE_FOR_prefetch].operand[0].mode))
1099 || (GET_MODE (op0) != Pmode))
1101 op0 = convert_memory_address (Pmode, op0);
1102 op0 = force_reg (Pmode, op0);
1104 emit_insn (gen_prefetch (op0, op1, op2));
1108 /* Don't do anything with direct references to volatile memory, but
1109 generate code to handle other side effects. */
1110 if (!MEM_P (op0) && side_effects_p (op0))
1114 /* Get a MEM rtx for expression EXP which is the address of an operand
1115 to be used in a string instruction (cmpstrsi, movmemsi, ..). LEN is
1116 the maximum length of the block of memory that might be accessed or
1120 get_memory_rtx (tree exp, tree len)
1122 tree orig_exp = exp;
1126 /* When EXP is not resolved SAVE_EXPR, MEM_ATTRS can be still derived
1127 from its expression, for expr->a.b only <variable>.a.b is recorded. */
1128 if (TREE_CODE (exp) == SAVE_EXPR && !SAVE_EXPR_RESOLVED_P (exp))
1129 exp = TREE_OPERAND (exp, 0);
1131 addr = expand_expr (orig_exp, NULL_RTX, ptr_mode, EXPAND_NORMAL);
1132 mem = gen_rtx_MEM (BLKmode, memory_address (BLKmode, addr));
1134 /* Get an expression we can use to find the attributes to assign to MEM.
1135 If it is an ADDR_EXPR, use the operand. Otherwise, dereference it if
1136 we can. First remove any nops. */
1137 while (CONVERT_EXPR_P (exp)
1138 && POINTER_TYPE_P (TREE_TYPE (TREE_OPERAND (exp, 0))))
1139 exp = TREE_OPERAND (exp, 0);
1142 if (TREE_CODE (exp) == POINTER_PLUS_EXPR
1143 && TREE_CODE (TREE_OPERAND (exp, 0)) == ADDR_EXPR
1144 && host_integerp (TREE_OPERAND (exp, 1), 0)
1145 && (off = tree_low_cst (TREE_OPERAND (exp, 1), 0)) > 0)
1146 exp = TREE_OPERAND (TREE_OPERAND (exp, 0), 0);
1147 else if (TREE_CODE (exp) == ADDR_EXPR)
1148 exp = TREE_OPERAND (exp, 0);
1149 else if (POINTER_TYPE_P (TREE_TYPE (exp)))
1150 exp = build1 (INDIRECT_REF, TREE_TYPE (TREE_TYPE (exp)), exp);
1154 /* Honor attributes derived from exp, except for the alias set
1155 (as builtin stringops may alias with anything) and the size
1156 (as stringops may access multiple array elements). */
1159 set_mem_attributes (mem, exp, 0);
1162 mem = adjust_automodify_address_nv (mem, BLKmode, NULL, off);
1164 /* Allow the string and memory builtins to overflow from one
1165 field into another, see http://gcc.gnu.org/PR23561.
1166 Thus avoid COMPONENT_REFs in MEM_EXPR unless we know the whole
1167 memory accessed by the string or memory builtin will fit
1168 within the field. */
1169 if (MEM_EXPR (mem) && TREE_CODE (MEM_EXPR (mem)) == COMPONENT_REF)
1171 tree mem_expr = MEM_EXPR (mem);
1172 HOST_WIDE_INT offset = -1, length = -1;
1175 while (TREE_CODE (inner) == ARRAY_REF
1176 || CONVERT_EXPR_P (inner)
1177 || TREE_CODE (inner) == VIEW_CONVERT_EXPR
1178 || TREE_CODE (inner) == SAVE_EXPR)
1179 inner = TREE_OPERAND (inner, 0);
1181 gcc_assert (TREE_CODE (inner) == COMPONENT_REF);
1183 if (MEM_OFFSET (mem)
1184 && CONST_INT_P (MEM_OFFSET (mem)))
1185 offset = INTVAL (MEM_OFFSET (mem));
1187 if (offset >= 0 && len && host_integerp (len, 0))
1188 length = tree_low_cst (len, 0);
1190 while (TREE_CODE (inner) == COMPONENT_REF)
1192 tree field = TREE_OPERAND (inner, 1);
1193 gcc_assert (TREE_CODE (mem_expr) == COMPONENT_REF);
1194 gcc_assert (field == TREE_OPERAND (mem_expr, 1));
1196 /* Bitfields are generally not byte-addressable. */
1197 gcc_assert (!DECL_BIT_FIELD (field)
1198 || ((tree_low_cst (DECL_FIELD_BIT_OFFSET (field), 1)
1199 % BITS_PER_UNIT) == 0
1200 && host_integerp (DECL_SIZE (field), 0)
1201 && (TREE_INT_CST_LOW (DECL_SIZE (field))
1202 % BITS_PER_UNIT) == 0));
1204 /* If we can prove that the memory starting at XEXP (mem, 0) and
1205 ending at XEXP (mem, 0) + LENGTH will fit into this field, we
1206 can keep the COMPONENT_REF in MEM_EXPR. But be careful with
1207 fields without DECL_SIZE_UNIT like flexible array members. */
1209 && DECL_SIZE_UNIT (field)
1210 && host_integerp (DECL_SIZE_UNIT (field), 0))
1213 = TREE_INT_CST_LOW (DECL_SIZE_UNIT (field));
1216 && offset + length <= size)
1221 && host_integerp (DECL_FIELD_OFFSET (field), 0))
1222 offset += TREE_INT_CST_LOW (DECL_FIELD_OFFSET (field))
1223 + tree_low_cst (DECL_FIELD_BIT_OFFSET (field), 1)
1231 mem_expr = TREE_OPERAND (mem_expr, 0);
1232 inner = TREE_OPERAND (inner, 0);
1235 if (mem_expr == NULL)
1237 if (mem_expr != MEM_EXPR (mem))
1239 set_mem_expr (mem, mem_expr);
1240 set_mem_offset (mem, offset >= 0 ? GEN_INT (offset) : NULL_RTX);
1243 set_mem_alias_set (mem, 0);
1244 set_mem_size (mem, NULL_RTX);
1250 /* Built-in functions to perform an untyped call and return. */
1252 /* For each register that may be used for calling a function, this
1253 gives a mode used to copy the register's value. VOIDmode indicates
1254 the register is not used for calling a function. If the machine
1255 has register windows, this gives only the outbound registers.
1256 INCOMING_REGNO gives the corresponding inbound register. */
1257 static enum machine_mode apply_args_mode[FIRST_PSEUDO_REGISTER];
1259 /* For each register that may be used for returning values, this gives
1260 a mode used to copy the register's value. VOIDmode indicates the
1261 register is not used for returning values. If the machine has
1262 register windows, this gives only the outbound registers.
1263 INCOMING_REGNO gives the corresponding inbound register. */
1264 static enum machine_mode apply_result_mode[FIRST_PSEUDO_REGISTER];
1266 /* Return the size required for the block returned by __builtin_apply_args,
1267 and initialize apply_args_mode. */
1270 apply_args_size (void)
1272 static int size = -1;
1275 enum machine_mode mode;
1277 /* The values computed by this function never change. */
1280 /* The first value is the incoming arg-pointer. */
1281 size = GET_MODE_SIZE (Pmode);
1283 /* The second value is the structure value address unless this is
1284 passed as an "invisible" first argument. */
1285 if (targetm.calls.struct_value_rtx (cfun ? TREE_TYPE (cfun->decl) : 0, 0))
1286 size += GET_MODE_SIZE (Pmode);
1288 for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++)
1289 if (FUNCTION_ARG_REGNO_P (regno))
1291 mode = reg_raw_mode[regno];
1293 gcc_assert (mode != VOIDmode);
1295 align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT;
1296 if (size % align != 0)
1297 size = CEIL (size, align) * align;
1298 size += GET_MODE_SIZE (mode);
1299 apply_args_mode[regno] = mode;
1303 apply_args_mode[regno] = VOIDmode;
1309 /* Return the size required for the block returned by __builtin_apply,
1310 and initialize apply_result_mode. */
1313 apply_result_size (void)
1315 static int size = -1;
1317 enum machine_mode mode;
1319 /* The values computed by this function never change. */
1324 for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++)
1325 if (FUNCTION_VALUE_REGNO_P (regno))
1327 mode = reg_raw_mode[regno];
1329 gcc_assert (mode != VOIDmode);
1331 align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT;
1332 if (size % align != 0)
1333 size = CEIL (size, align) * align;
1334 size += GET_MODE_SIZE (mode);
1335 apply_result_mode[regno] = mode;
1338 apply_result_mode[regno] = VOIDmode;
1340 /* Allow targets that use untyped_call and untyped_return to override
1341 the size so that machine-specific information can be stored here. */
1342 #ifdef APPLY_RESULT_SIZE
1343 size = APPLY_RESULT_SIZE;
1349 #if defined (HAVE_untyped_call) || defined (HAVE_untyped_return)
1350 /* Create a vector describing the result block RESULT. If SAVEP is true,
1351 the result block is used to save the values; otherwise it is used to
1352 restore the values. */
1355 result_vector (int savep, rtx result)
1357 int regno, size, align, nelts;
1358 enum machine_mode mode;
1360 rtx *savevec = XALLOCAVEC (rtx, FIRST_PSEUDO_REGISTER);
1363 for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++)
1364 if ((mode = apply_result_mode[regno]) != VOIDmode)
1366 align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT;
1367 if (size % align != 0)
1368 size = CEIL (size, align) * align;
1369 reg = gen_rtx_REG (mode, savep ? regno : INCOMING_REGNO (regno));
1370 mem = adjust_address (result, mode, size);
1371 savevec[nelts++] = (savep
1372 ? gen_rtx_SET (VOIDmode, mem, reg)
1373 : gen_rtx_SET (VOIDmode, reg, mem));
1374 size += GET_MODE_SIZE (mode);
1376 return gen_rtx_PARALLEL (VOIDmode, gen_rtvec_v (nelts, savevec));
1378 #endif /* HAVE_untyped_call or HAVE_untyped_return */
1380 /* Save the state required to perform an untyped call with the same
1381 arguments as were passed to the current function. */
1384 expand_builtin_apply_args_1 (void)
1387 int size, align, regno;
1388 enum machine_mode mode;
1389 rtx struct_incoming_value = targetm.calls.struct_value_rtx (cfun ? TREE_TYPE (cfun->decl) : 0, 1);
1391 /* Create a block where the arg-pointer, structure value address,
1392 and argument registers can be saved. */
1393 registers = assign_stack_local (BLKmode, apply_args_size (), -1);
1395 /* Walk past the arg-pointer and structure value address. */
1396 size = GET_MODE_SIZE (Pmode);
1397 if (targetm.calls.struct_value_rtx (cfun ? TREE_TYPE (cfun->decl) : 0, 0))
1398 size += GET_MODE_SIZE (Pmode);
1400 /* Save each register used in calling a function to the block. */
1401 for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++)
1402 if ((mode = apply_args_mode[regno]) != VOIDmode)
1404 align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT;
1405 if (size % align != 0)
1406 size = CEIL (size, align) * align;
1408 tem = gen_rtx_REG (mode, INCOMING_REGNO (regno));
1410 emit_move_insn (adjust_address (registers, mode, size), tem);
1411 size += GET_MODE_SIZE (mode);
1414 /* Save the arg pointer to the block. */
1415 tem = copy_to_reg (crtl->args.internal_arg_pointer);
1416 #ifdef STACK_GROWS_DOWNWARD
1417 /* We need the pointer as the caller actually passed them to us, not
1418 as we might have pretended they were passed. Make sure it's a valid
1419 operand, as emit_move_insn isn't expected to handle a PLUS. */
1421 = force_operand (plus_constant (tem, crtl->args.pretend_args_size),
1424 emit_move_insn (adjust_address (registers, Pmode, 0), tem);
1426 size = GET_MODE_SIZE (Pmode);
1428 /* Save the structure value address unless this is passed as an
1429 "invisible" first argument. */
1430 if (struct_incoming_value)
1432 emit_move_insn (adjust_address (registers, Pmode, size),
1433 copy_to_reg (struct_incoming_value));
1434 size += GET_MODE_SIZE (Pmode);
1437 /* Return the address of the block. */
1438 return copy_addr_to_reg (XEXP (registers, 0));
1441 /* __builtin_apply_args returns block of memory allocated on
1442 the stack into which is stored the arg pointer, structure
1443 value address, static chain, and all the registers that might
1444 possibly be used in performing a function call. The code is
1445 moved to the start of the function so the incoming values are
1449 expand_builtin_apply_args (void)
1451 /* Don't do __builtin_apply_args more than once in a function.
1452 Save the result of the first call and reuse it. */
1453 if (apply_args_value != 0)
1454 return apply_args_value;
1456 /* When this function is called, it means that registers must be
1457 saved on entry to this function. So we migrate the
1458 call to the first insn of this function. */
1463 temp = expand_builtin_apply_args_1 ();
1467 apply_args_value = temp;
1469 /* Put the insns after the NOTE that starts the function.
1470 If this is inside a start_sequence, make the outer-level insn
1471 chain current, so the code is placed at the start of the
1472 function. If internal_arg_pointer is a non-virtual pseudo,
1473 it needs to be placed after the function that initializes
1475 push_topmost_sequence ();
1476 if (REG_P (crtl->args.internal_arg_pointer)
1477 && REGNO (crtl->args.internal_arg_pointer) > LAST_VIRTUAL_REGISTER)
1478 emit_insn_before (seq, parm_birth_insn);
1480 emit_insn_before (seq, NEXT_INSN (entry_of_function ()));
1481 pop_topmost_sequence ();
1486 /* Perform an untyped call and save the state required to perform an
1487 untyped return of whatever value was returned by the given function. */
1490 expand_builtin_apply (rtx function, rtx arguments, rtx argsize)
1492 int size, align, regno;
1493 enum machine_mode mode;
1494 rtx incoming_args, result, reg, dest, src, call_insn;
1495 rtx old_stack_level = 0;
1496 rtx call_fusage = 0;
1497 rtx struct_value = targetm.calls.struct_value_rtx (cfun ? TREE_TYPE (cfun->decl) : 0, 0);
1499 arguments = convert_memory_address (Pmode, arguments);
1501 /* Create a block where the return registers can be saved. */
1502 result = assign_stack_local (BLKmode, apply_result_size (), -1);
1504 /* Fetch the arg pointer from the ARGUMENTS block. */
1505 incoming_args = gen_reg_rtx (Pmode);
1506 emit_move_insn (incoming_args, gen_rtx_MEM (Pmode, arguments));
1507 #ifndef STACK_GROWS_DOWNWARD
1508 incoming_args = expand_simple_binop (Pmode, MINUS, incoming_args, argsize,
1509 incoming_args, 0, OPTAB_LIB_WIDEN);
1512 /* Push a new argument block and copy the arguments. Do not allow
1513 the (potential) memcpy call below to interfere with our stack
1515 do_pending_stack_adjust ();
1518 /* Save the stack with nonlocal if available. */
1519 #ifdef HAVE_save_stack_nonlocal
1520 if (HAVE_save_stack_nonlocal)
1521 emit_stack_save (SAVE_NONLOCAL, &old_stack_level, NULL_RTX);
1524 emit_stack_save (SAVE_BLOCK, &old_stack_level, NULL_RTX);
1526 /* Allocate a block of memory onto the stack and copy the memory
1527 arguments to the outgoing arguments address. */
1528 allocate_dynamic_stack_space (argsize, 0, BITS_PER_UNIT);
1530 /* Set DRAP flag to true, even though allocate_dynamic_stack_space
1531 may have already set current_function_calls_alloca to true.
1532 current_function_calls_alloca won't be set if argsize is zero,
1533 so we have to guarantee need_drap is true here. */
1534 if (SUPPORTS_STACK_ALIGNMENT)
1535 crtl->need_drap = true;
1537 dest = virtual_outgoing_args_rtx;
1538 #ifndef STACK_GROWS_DOWNWARD
1539 if (CONST_INT_P (argsize))
1540 dest = plus_constant (dest, -INTVAL (argsize));
1542 dest = gen_rtx_PLUS (Pmode, dest, negate_rtx (Pmode, argsize));
1544 dest = gen_rtx_MEM (BLKmode, dest);
1545 set_mem_align (dest, PARM_BOUNDARY);
1546 src = gen_rtx_MEM (BLKmode, incoming_args);
1547 set_mem_align (src, PARM_BOUNDARY);
1548 emit_block_move (dest, src, argsize, BLOCK_OP_NORMAL);
1550 /* Refer to the argument block. */
1552 arguments = gen_rtx_MEM (BLKmode, arguments);
1553 set_mem_align (arguments, PARM_BOUNDARY);
1555 /* Walk past the arg-pointer and structure value address. */
1556 size = GET_MODE_SIZE (Pmode);
1558 size += GET_MODE_SIZE (Pmode);
1560 /* Restore each of the registers previously saved. Make USE insns
1561 for each of these registers for use in making the call. */
1562 for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++)
1563 if ((mode = apply_args_mode[regno]) != VOIDmode)
1565 align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT;
1566 if (size % align != 0)
1567 size = CEIL (size, align) * align;
1568 reg = gen_rtx_REG (mode, regno);
1569 emit_move_insn (reg, adjust_address (arguments, mode, size));
1570 use_reg (&call_fusage, reg);
1571 size += GET_MODE_SIZE (mode);
1574 /* Restore the structure value address unless this is passed as an
1575 "invisible" first argument. */
1576 size = GET_MODE_SIZE (Pmode);
1579 rtx value = gen_reg_rtx (Pmode);
1580 emit_move_insn (value, adjust_address (arguments, Pmode, size));
1581 emit_move_insn (struct_value, value);
1582 if (REG_P (struct_value))
1583 use_reg (&call_fusage, struct_value);
1584 size += GET_MODE_SIZE (Pmode);
1587 /* All arguments and registers used for the call are set up by now! */
1588 function = prepare_call_address (NULL, function, NULL, &call_fusage, 0, 0);
1590 /* Ensure address is valid. SYMBOL_REF is already valid, so no need,
1591 and we don't want to load it into a register as an optimization,
1592 because prepare_call_address already did it if it should be done. */
1593 if (GET_CODE (function) != SYMBOL_REF)
1594 function = memory_address (FUNCTION_MODE, function);
1596 /* Generate the actual call instruction and save the return value. */
1597 #ifdef HAVE_untyped_call
1598 if (HAVE_untyped_call)
1599 emit_call_insn (gen_untyped_call (gen_rtx_MEM (FUNCTION_MODE, function),
1600 result, result_vector (1, result)));
1603 #ifdef HAVE_call_value
1604 if (HAVE_call_value)
1608 /* Locate the unique return register. It is not possible to
1609 express a call that sets more than one return register using
1610 call_value; use untyped_call for that. In fact, untyped_call
1611 only needs to save the return registers in the given block. */
1612 for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++)
1613 if ((mode = apply_result_mode[regno]) != VOIDmode)
1615 gcc_assert (!valreg); /* HAVE_untyped_call required. */
1617 valreg = gen_rtx_REG (mode, regno);
1620 emit_call_insn (GEN_CALL_VALUE (valreg,
1621 gen_rtx_MEM (FUNCTION_MODE, function),
1622 const0_rtx, NULL_RTX, const0_rtx));
1624 emit_move_insn (adjust_address (result, GET_MODE (valreg), 0), valreg);
1630 /* Find the CALL insn we just emitted, and attach the register usage
1632 call_insn = last_call_insn ();
1633 add_function_usage_to (call_insn, call_fusage);
1635 /* Restore the stack. */
1636 #ifdef HAVE_save_stack_nonlocal
1637 if (HAVE_save_stack_nonlocal)
1638 emit_stack_restore (SAVE_NONLOCAL, old_stack_level, NULL_RTX);
1641 emit_stack_restore (SAVE_BLOCK, old_stack_level, NULL_RTX);
1645 /* Return the address of the result block. */
1646 result = copy_addr_to_reg (XEXP (result, 0));
1647 return convert_memory_address (ptr_mode, result);
1650 /* Perform an untyped return. */
1653 expand_builtin_return (rtx result)
1655 int size, align, regno;
1656 enum machine_mode mode;
1658 rtx call_fusage = 0;
1660 result = convert_memory_address (Pmode, result);
1662 apply_result_size ();
1663 result = gen_rtx_MEM (BLKmode, result);
1665 #ifdef HAVE_untyped_return
1666 if (HAVE_untyped_return)
1668 emit_jump_insn (gen_untyped_return (result, result_vector (0, result)));
1674 /* Restore the return value and note that each value is used. */
1676 for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++)
1677 if ((mode = apply_result_mode[regno]) != VOIDmode)
1679 align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT;
1680 if (size % align != 0)
1681 size = CEIL (size, align) * align;
1682 reg = gen_rtx_REG (mode, INCOMING_REGNO (regno));
1683 emit_move_insn (reg, adjust_address (result, mode, size));
1685 push_to_sequence (call_fusage);
1687 call_fusage = get_insns ();
1689 size += GET_MODE_SIZE (mode);
1692 /* Put the USE insns before the return. */
1693 emit_insn (call_fusage);
1695 /* Return whatever values was restored by jumping directly to the end
1697 expand_naked_return ();
1700 /* Used by expand_builtin_classify_type and fold_builtin_classify_type. */
1702 static enum type_class
1703 type_to_class (tree type)
1705 switch (TREE_CODE (type))
1707 case VOID_TYPE: return void_type_class;
1708 case INTEGER_TYPE: return integer_type_class;
1709 case ENUMERAL_TYPE: return enumeral_type_class;
1710 case BOOLEAN_TYPE: return boolean_type_class;
1711 case POINTER_TYPE: return pointer_type_class;
1712 case REFERENCE_TYPE: return reference_type_class;
1713 case OFFSET_TYPE: return offset_type_class;
1714 case REAL_TYPE: return real_type_class;
1715 case COMPLEX_TYPE: return complex_type_class;
1716 case FUNCTION_TYPE: return function_type_class;
1717 case METHOD_TYPE: return method_type_class;
1718 case RECORD_TYPE: return record_type_class;
1720 case QUAL_UNION_TYPE: return union_type_class;
1721 case ARRAY_TYPE: return (TYPE_STRING_FLAG (type)
1722 ? string_type_class : array_type_class);
1723 case LANG_TYPE: return lang_type_class;
1724 default: return no_type_class;
1728 /* Expand a call EXP to __builtin_classify_type. */
1731 expand_builtin_classify_type (tree exp)
1733 if (call_expr_nargs (exp))
1734 return GEN_INT (type_to_class (TREE_TYPE (CALL_EXPR_ARG (exp, 0))));
1735 return GEN_INT (no_type_class);
1738 /* This helper macro, meant to be used in mathfn_built_in below,
1739 determines which among a set of three builtin math functions is
1740 appropriate for a given type mode. The `F' and `L' cases are
1741 automatically generated from the `double' case. */
1742 #define CASE_MATHFN(BUILT_IN_MATHFN) \
1743 case BUILT_IN_MATHFN: case BUILT_IN_MATHFN##F: case BUILT_IN_MATHFN##L: \
1744 fcode = BUILT_IN_MATHFN; fcodef = BUILT_IN_MATHFN##F ; \
1745 fcodel = BUILT_IN_MATHFN##L ; break;
1746 /* Similar to above, but appends _R after any F/L suffix. */
1747 #define CASE_MATHFN_REENT(BUILT_IN_MATHFN) \
1748 case BUILT_IN_MATHFN##_R: case BUILT_IN_MATHFN##F_R: case BUILT_IN_MATHFN##L_R: \
1749 fcode = BUILT_IN_MATHFN##_R; fcodef = BUILT_IN_MATHFN##F_R ; \
1750 fcodel = BUILT_IN_MATHFN##L_R ; break;
1752 /* Return mathematic function equivalent to FN but operating directly
1753 on TYPE, if available. If IMPLICIT is true find the function in
1754 implicit_built_in_decls[], otherwise use built_in_decls[]. If we
1755 can't do the conversion, return zero. */
1758 mathfn_built_in_1 (tree type, enum built_in_function fn, bool implicit)
1760 tree const *const fn_arr
1761 = implicit ? implicit_built_in_decls : built_in_decls;
1762 enum built_in_function fcode, fcodef, fcodel;
1766 CASE_MATHFN (BUILT_IN_ACOS)
1767 CASE_MATHFN (BUILT_IN_ACOSH)
1768 CASE_MATHFN (BUILT_IN_ASIN)
1769 CASE_MATHFN (BUILT_IN_ASINH)
1770 CASE_MATHFN (BUILT_IN_ATAN)
1771 CASE_MATHFN (BUILT_IN_ATAN2)
1772 CASE_MATHFN (BUILT_IN_ATANH)
1773 CASE_MATHFN (BUILT_IN_CBRT)
1774 CASE_MATHFN (BUILT_IN_CEIL)
1775 CASE_MATHFN (BUILT_IN_CEXPI)
1776 CASE_MATHFN (BUILT_IN_COPYSIGN)
1777 CASE_MATHFN (BUILT_IN_COS)
1778 CASE_MATHFN (BUILT_IN_COSH)
1779 CASE_MATHFN (BUILT_IN_DREM)
1780 CASE_MATHFN (BUILT_IN_ERF)
1781 CASE_MATHFN (BUILT_IN_ERFC)
1782 CASE_MATHFN (BUILT_IN_EXP)
1783 CASE_MATHFN (BUILT_IN_EXP10)
1784 CASE_MATHFN (BUILT_IN_EXP2)
1785 CASE_MATHFN (BUILT_IN_EXPM1)
1786 CASE_MATHFN (BUILT_IN_FABS)
1787 CASE_MATHFN (BUILT_IN_FDIM)
1788 CASE_MATHFN (BUILT_IN_FLOOR)
1789 CASE_MATHFN (BUILT_IN_FMA)
1790 CASE_MATHFN (BUILT_IN_FMAX)
1791 CASE_MATHFN (BUILT_IN_FMIN)
1792 CASE_MATHFN (BUILT_IN_FMOD)
1793 CASE_MATHFN (BUILT_IN_FREXP)
1794 CASE_MATHFN (BUILT_IN_GAMMA)
1795 CASE_MATHFN_REENT (BUILT_IN_GAMMA) /* GAMMA_R */
1796 CASE_MATHFN (BUILT_IN_HUGE_VAL)
1797 CASE_MATHFN (BUILT_IN_HYPOT)
1798 CASE_MATHFN (BUILT_IN_ILOGB)
1799 CASE_MATHFN (BUILT_IN_INF)
1800 CASE_MATHFN (BUILT_IN_ISINF)
1801 CASE_MATHFN (BUILT_IN_J0)
1802 CASE_MATHFN (BUILT_IN_J1)
1803 CASE_MATHFN (BUILT_IN_JN)
1804 CASE_MATHFN (BUILT_IN_LCEIL)
1805 CASE_MATHFN (BUILT_IN_LDEXP)
1806 CASE_MATHFN (BUILT_IN_LFLOOR)
1807 CASE_MATHFN (BUILT_IN_LGAMMA)
1808 CASE_MATHFN_REENT (BUILT_IN_LGAMMA) /* LGAMMA_R */
1809 CASE_MATHFN (BUILT_IN_LLCEIL)
1810 CASE_MATHFN (BUILT_IN_LLFLOOR)
1811 CASE_MATHFN (BUILT_IN_LLRINT)
1812 CASE_MATHFN (BUILT_IN_LLROUND)
1813 CASE_MATHFN (BUILT_IN_LOG)
1814 CASE_MATHFN (BUILT_IN_LOG10)
1815 CASE_MATHFN (BUILT_IN_LOG1P)
1816 CASE_MATHFN (BUILT_IN_LOG2)
1817 CASE_MATHFN (BUILT_IN_LOGB)
1818 CASE_MATHFN (BUILT_IN_LRINT)
1819 CASE_MATHFN (BUILT_IN_LROUND)
1820 CASE_MATHFN (BUILT_IN_MODF)
1821 CASE_MATHFN (BUILT_IN_NAN)
1822 CASE_MATHFN (BUILT_IN_NANS)
1823 CASE_MATHFN (BUILT_IN_NEARBYINT)
1824 CASE_MATHFN (BUILT_IN_NEXTAFTER)
1825 CASE_MATHFN (BUILT_IN_NEXTTOWARD)
1826 CASE_MATHFN (BUILT_IN_POW)
1827 CASE_MATHFN (BUILT_IN_POWI)
1828 CASE_MATHFN (BUILT_IN_POW10)
1829 CASE_MATHFN (BUILT_IN_REMAINDER)
1830 CASE_MATHFN (BUILT_IN_REMQUO)
1831 CASE_MATHFN (BUILT_IN_RINT)
1832 CASE_MATHFN (BUILT_IN_ROUND)
1833 CASE_MATHFN (BUILT_IN_SCALB)
1834 CASE_MATHFN (BUILT_IN_SCALBLN)
1835 CASE_MATHFN (BUILT_IN_SCALBN)
1836 CASE_MATHFN (BUILT_IN_SIGNBIT)
1837 CASE_MATHFN (BUILT_IN_SIGNIFICAND)
1838 CASE_MATHFN (BUILT_IN_SIN)
1839 CASE_MATHFN (BUILT_IN_SINCOS)
1840 CASE_MATHFN (BUILT_IN_SINH)
1841 CASE_MATHFN (BUILT_IN_SQRT)
1842 CASE_MATHFN (BUILT_IN_TAN)
1843 CASE_MATHFN (BUILT_IN_TANH)
1844 CASE_MATHFN (BUILT_IN_TGAMMA)
1845 CASE_MATHFN (BUILT_IN_TRUNC)
1846 CASE_MATHFN (BUILT_IN_Y0)
1847 CASE_MATHFN (BUILT_IN_Y1)
1848 CASE_MATHFN (BUILT_IN_YN)
1854 if (TYPE_MAIN_VARIANT (type) == double_type_node)
1855 return fn_arr[fcode];
1856 else if (TYPE_MAIN_VARIANT (type) == float_type_node)
1857 return fn_arr[fcodef];
1858 else if (TYPE_MAIN_VARIANT (type) == long_double_type_node)
1859 return fn_arr[fcodel];
1864 /* Like mathfn_built_in_1(), but always use the implicit array. */
1867 mathfn_built_in (tree type, enum built_in_function fn)
1869 return mathfn_built_in_1 (type, fn, /*implicit=*/ 1);
1872 /* If errno must be maintained, expand the RTL to check if the result,
1873 TARGET, of a built-in function call, EXP, is NaN, and if so set
1877 expand_errno_check (tree exp, rtx target)
1879 rtx lab = gen_label_rtx ();
1881 /* Test the result; if it is NaN, set errno=EDOM because
1882 the argument was not in the domain. */
1883 do_compare_rtx_and_jump (target, target, EQ, 0, GET_MODE (target),
1884 NULL_RTX, NULL_RTX, lab,
1885 /* The jump is very likely. */
1886 REG_BR_PROB_BASE - (REG_BR_PROB_BASE / 2000 - 1));
1889 /* If this built-in doesn't throw an exception, set errno directly. */
1890 if (TREE_NOTHROW (TREE_OPERAND (CALL_EXPR_FN (exp), 0)))
1892 #ifdef GEN_ERRNO_RTX
1893 rtx errno_rtx = GEN_ERRNO_RTX;
1896 = gen_rtx_MEM (word_mode, gen_rtx_SYMBOL_REF (Pmode, "errno"));
1898 emit_move_insn (errno_rtx, GEN_INT (TARGET_EDOM));
1904 /* Make sure the library call isn't expanded as a tail call. */
1905 CALL_EXPR_TAILCALL (exp) = 0;
1907 /* We can't set errno=EDOM directly; let the library call do it.
1908 Pop the arguments right away in case the call gets deleted. */
1910 expand_call (exp, target, 0);
1915 /* Expand a call to one of the builtin math functions (sqrt, exp, or log).
1916 Return NULL_RTX if a normal call should be emitted rather than expanding
1917 the function in-line. EXP is the expression that is a call to the builtin
1918 function; if convenient, the result should be placed in TARGET.
1919 SUBTARGET may be used as the target for computing one of EXP's operands. */
1922 expand_builtin_mathfn (tree exp, rtx target, rtx subtarget)
1924 optab builtin_optab;
1926 tree fndecl = get_callee_fndecl (exp);
1927 enum machine_mode mode;
1928 bool errno_set = false;
1931 if (!validate_arglist (exp, REAL_TYPE, VOID_TYPE))
1934 arg = CALL_EXPR_ARG (exp, 0);
1936 switch (DECL_FUNCTION_CODE (fndecl))
1938 CASE_FLT_FN (BUILT_IN_SQRT):
1939 errno_set = ! tree_expr_nonnegative_p (arg);
1940 builtin_optab = sqrt_optab;
1942 CASE_FLT_FN (BUILT_IN_EXP):
1943 errno_set = true; builtin_optab = exp_optab; break;
1944 CASE_FLT_FN (BUILT_IN_EXP10):
1945 CASE_FLT_FN (BUILT_IN_POW10):
1946 errno_set = true; builtin_optab = exp10_optab; break;
1947 CASE_FLT_FN (BUILT_IN_EXP2):
1948 errno_set = true; builtin_optab = exp2_optab; break;
1949 CASE_FLT_FN (BUILT_IN_EXPM1):
1950 errno_set = true; builtin_optab = expm1_optab; break;
1951 CASE_FLT_FN (BUILT_IN_LOGB):
1952 errno_set = true; builtin_optab = logb_optab; break;
1953 CASE_FLT_FN (BUILT_IN_LOG):
1954 errno_set = true; builtin_optab = log_optab; break;
1955 CASE_FLT_FN (BUILT_IN_LOG10):
1956 errno_set = true; builtin_optab = log10_optab; break;
1957 CASE_FLT_FN (BUILT_IN_LOG2):
1958 errno_set = true; builtin_optab = log2_optab; break;
1959 CASE_FLT_FN (BUILT_IN_LOG1P):
1960 errno_set = true; builtin_optab = log1p_optab; break;
1961 CASE_FLT_FN (BUILT_IN_ASIN):
1962 builtin_optab = asin_optab; break;
1963 CASE_FLT_FN (BUILT_IN_ACOS):
1964 builtin_optab = acos_optab; break;
1965 CASE_FLT_FN (BUILT_IN_TAN):
1966 builtin_optab = tan_optab; break;
1967 CASE_FLT_FN (BUILT_IN_ATAN):
1968 builtin_optab = atan_optab; break;
1969 CASE_FLT_FN (BUILT_IN_FLOOR):
1970 builtin_optab = floor_optab; break;
1971 CASE_FLT_FN (BUILT_IN_CEIL):
1972 builtin_optab = ceil_optab; break;
1973 CASE_FLT_FN (BUILT_IN_TRUNC):
1974 builtin_optab = btrunc_optab; break;
1975 CASE_FLT_FN (BUILT_IN_ROUND):
1976 builtin_optab = round_optab; break;
1977 CASE_FLT_FN (BUILT_IN_NEARBYINT):
1978 builtin_optab = nearbyint_optab;
1979 if (flag_trapping_math)
1981 /* Else fallthrough and expand as rint. */
1982 CASE_FLT_FN (BUILT_IN_RINT):
1983 builtin_optab = rint_optab; break;
1984 CASE_FLT_FN (BUILT_IN_SIGNIFICAND):
1985 builtin_optab = significand_optab; break;
1990 /* Make a suitable register to place result in. */
1991 mode = TYPE_MODE (TREE_TYPE (exp));
1993 if (! flag_errno_math || ! HONOR_NANS (mode))
1996 /* Before working hard, check whether the instruction is available. */
1997 if (optab_handler (builtin_optab, mode)->insn_code != CODE_FOR_nothing)
1999 target = gen_reg_rtx (mode);
2001 /* Wrap the computation of the argument in a SAVE_EXPR, as we may
2002 need to expand the argument again. This way, we will not perform
2003 side-effects more the once. */
2004 CALL_EXPR_ARG (exp, 0) = arg = builtin_save_expr (arg);
2006 op0 = expand_expr (arg, subtarget, VOIDmode, EXPAND_NORMAL);
2010 /* Compute into TARGET.
2011 Set TARGET to wherever the result comes back. */
2012 target = expand_unop (mode, builtin_optab, op0, target, 0);
2017 expand_errno_check (exp, target);
2019 /* Output the entire sequence. */
2020 insns = get_insns ();
2026 /* If we were unable to expand via the builtin, stop the sequence
2027 (without outputting the insns) and call to the library function
2028 with the stabilized argument list. */
2032 return expand_call (exp, target, target == const0_rtx);
2035 /* Expand a call to the builtin binary math functions (pow and atan2).
2036 Return NULL_RTX if a normal call should be emitted rather than expanding the
2037 function in-line. EXP is the expression that is a call to the builtin
2038 function; if convenient, the result should be placed in TARGET.
2039 SUBTARGET may be used as the target for computing one of EXP's
2043 expand_builtin_mathfn_2 (tree exp, rtx target, rtx subtarget)
2045 optab builtin_optab;
2046 rtx op0, op1, insns;
2047 int op1_type = REAL_TYPE;
2048 tree fndecl = get_callee_fndecl (exp);
2050 enum machine_mode mode;
2051 bool errno_set = true;
2053 switch (DECL_FUNCTION_CODE (fndecl))
2055 CASE_FLT_FN (BUILT_IN_SCALBN):
2056 CASE_FLT_FN (BUILT_IN_SCALBLN):
2057 CASE_FLT_FN (BUILT_IN_LDEXP):
2058 op1_type = INTEGER_TYPE;
2063 if (!validate_arglist (exp, REAL_TYPE, op1_type, VOID_TYPE))
2066 arg0 = CALL_EXPR_ARG (exp, 0);
2067 arg1 = CALL_EXPR_ARG (exp, 1);
2069 switch (DECL_FUNCTION_CODE (fndecl))
2071 CASE_FLT_FN (BUILT_IN_POW):
2072 builtin_optab = pow_optab; break;
2073 CASE_FLT_FN (BUILT_IN_ATAN2):
2074 builtin_optab = atan2_optab; break;
2075 CASE_FLT_FN (BUILT_IN_SCALB):
2076 if (REAL_MODE_FORMAT (TYPE_MODE (TREE_TYPE (exp)))->b != 2)
2078 builtin_optab = scalb_optab; break;
2079 CASE_FLT_FN (BUILT_IN_SCALBN):
2080 CASE_FLT_FN (BUILT_IN_SCALBLN):
2081 if (REAL_MODE_FORMAT (TYPE_MODE (TREE_TYPE (exp)))->b != 2)
2083 /* Fall through... */
2084 CASE_FLT_FN (BUILT_IN_LDEXP):
2085 builtin_optab = ldexp_optab; break;
2086 CASE_FLT_FN (BUILT_IN_FMOD):
2087 builtin_optab = fmod_optab; break;
2088 CASE_FLT_FN (BUILT_IN_REMAINDER):
2089 CASE_FLT_FN (BUILT_IN_DREM):
2090 builtin_optab = remainder_optab; break;
2095 /* Make a suitable register to place result in. */
2096 mode = TYPE_MODE (TREE_TYPE (exp));
2098 /* Before working hard, check whether the instruction is available. */
2099 if (optab_handler (builtin_optab, mode)->insn_code == CODE_FOR_nothing)
2102 target = gen_reg_rtx (mode);
2104 if (! flag_errno_math || ! HONOR_NANS (mode))
2107 /* Always stabilize the argument list. */
2108 CALL_EXPR_ARG (exp, 0) = arg0 = builtin_save_expr (arg0);
2109 CALL_EXPR_ARG (exp, 1) = arg1 = builtin_save_expr (arg1);
2111 op0 = expand_expr (arg0, subtarget, VOIDmode, EXPAND_NORMAL);
2112 op1 = expand_normal (arg1);
2116 /* Compute into TARGET.
2117 Set TARGET to wherever the result comes back. */
2118 target = expand_binop (mode, builtin_optab, op0, op1,
2119 target, 0, OPTAB_DIRECT);
2121 /* If we were unable to expand via the builtin, stop the sequence
2122 (without outputting the insns) and call to the library function
2123 with the stabilized argument list. */
2127 return expand_call (exp, target, target == const0_rtx);
2131 expand_errno_check (exp, target);
2133 /* Output the entire sequence. */
2134 insns = get_insns ();
2141 /* Expand a call to the builtin sin and cos math functions.
2142 Return NULL_RTX if a normal call should be emitted rather than expanding the
2143 function in-line. EXP is the expression that is a call to the builtin
2144 function; if convenient, the result should be placed in TARGET.
2145 SUBTARGET may be used as the target for computing one of EXP's
2149 expand_builtin_mathfn_3 (tree exp, rtx target, rtx subtarget)
2151 optab builtin_optab;
2153 tree fndecl = get_callee_fndecl (exp);
2154 enum machine_mode mode;
2157 if (!validate_arglist (exp, REAL_TYPE, VOID_TYPE))
2160 arg = CALL_EXPR_ARG (exp, 0);
2162 switch (DECL_FUNCTION_CODE (fndecl))
2164 CASE_FLT_FN (BUILT_IN_SIN):
2165 CASE_FLT_FN (BUILT_IN_COS):
2166 builtin_optab = sincos_optab; break;
2171 /* Make a suitable register to place result in. */
2172 mode = TYPE_MODE (TREE_TYPE (exp));
2174 /* Check if sincos insn is available, otherwise fallback
2175 to sin or cos insn. */
2176 if (optab_handler (builtin_optab, mode)->insn_code == CODE_FOR_nothing)
2177 switch (DECL_FUNCTION_CODE (fndecl))
2179 CASE_FLT_FN (BUILT_IN_SIN):
2180 builtin_optab = sin_optab; break;
2181 CASE_FLT_FN (BUILT_IN_COS):
2182 builtin_optab = cos_optab; break;
2187 /* Before working hard, check whether the instruction is available. */
2188 if (optab_handler (builtin_optab, mode)->insn_code != CODE_FOR_nothing)
2190 target = gen_reg_rtx (mode);
2192 /* Wrap the computation of the argument in a SAVE_EXPR, as we may
2193 need to expand the argument again. This way, we will not perform
2194 side-effects more the once. */
2195 CALL_EXPR_ARG (exp, 0) = arg = builtin_save_expr (arg);
2197 op0 = expand_expr (arg, subtarget, VOIDmode, EXPAND_NORMAL);
2201 /* Compute into TARGET.
2202 Set TARGET to wherever the result comes back. */
2203 if (builtin_optab == sincos_optab)
2207 switch (DECL_FUNCTION_CODE (fndecl))
2209 CASE_FLT_FN (BUILT_IN_SIN):
2210 result = expand_twoval_unop (builtin_optab, op0, 0, target, 0);
2212 CASE_FLT_FN (BUILT_IN_COS):
2213 result = expand_twoval_unop (builtin_optab, op0, target, 0, 0);
2218 gcc_assert (result);
2222 target = expand_unop (mode, builtin_optab, op0, target, 0);
2227 /* Output the entire sequence. */
2228 insns = get_insns ();
2234 /* If we were unable to expand via the builtin, stop the sequence
2235 (without outputting the insns) and call to the library function
2236 with the stabilized argument list. */
2240 target = expand_call (exp, target, target == const0_rtx);
2245 /* Given an interclass math builtin decl FNDECL and it's argument ARG
2246 return an RTL instruction code that implements the functionality.
2247 If that isn't possible or available return CODE_FOR_nothing. */
2249 static enum insn_code
2250 interclass_mathfn_icode (tree arg, tree fndecl)
2252 bool errno_set = false;
2253 optab builtin_optab = 0;
2254 enum machine_mode mode;
2256 switch (DECL_FUNCTION_CODE (fndecl))
2258 CASE_FLT_FN (BUILT_IN_ILOGB):
2259 errno_set = true; builtin_optab = ilogb_optab; break;
2260 CASE_FLT_FN (BUILT_IN_ISINF):
2261 builtin_optab = isinf_optab; break;
2262 case BUILT_IN_ISNORMAL:
2263 case BUILT_IN_ISFINITE:
2264 CASE_FLT_FN (BUILT_IN_FINITE):
2265 case BUILT_IN_FINITED32:
2266 case BUILT_IN_FINITED64:
2267 case BUILT_IN_FINITED128:
2268 case BUILT_IN_ISINFD32:
2269 case BUILT_IN_ISINFD64:
2270 case BUILT_IN_ISINFD128:
2271 /* These builtins have no optabs (yet). */
2277 /* There's no easy way to detect the case we need to set EDOM. */
2278 if (flag_errno_math && errno_set)
2279 return CODE_FOR_nothing;
2281 /* Optab mode depends on the mode of the input argument. */
2282 mode = TYPE_MODE (TREE_TYPE (arg));
2285 return optab_handler (builtin_optab, mode)->insn_code;
2286 return CODE_FOR_nothing;
2289 /* Expand a call to one of the builtin math functions that operate on
2290 floating point argument and output an integer result (ilogb, isinf,
2292 Return 0 if a normal call should be emitted rather than expanding the
2293 function in-line. EXP is the expression that is a call to the builtin
2294 function; if convenient, the result should be placed in TARGET.
2295 SUBTARGET may be used as the target for computing one of EXP's operands. */
2298 expand_builtin_interclass_mathfn (tree exp, rtx target, rtx subtarget)
2300 enum insn_code icode = CODE_FOR_nothing;
2302 tree fndecl = get_callee_fndecl (exp);
2303 enum machine_mode mode;
2306 if (!validate_arglist (exp, REAL_TYPE, VOID_TYPE))
2309 arg = CALL_EXPR_ARG (exp, 0);
2310 icode = interclass_mathfn_icode (arg, fndecl);
2311 mode = TYPE_MODE (TREE_TYPE (arg));
2313 if (icode != CODE_FOR_nothing)
2315 rtx last = get_last_insn ();
2316 tree orig_arg = arg;
2317 /* Make a suitable register to place result in. */
2319 || GET_MODE (target) != TYPE_MODE (TREE_TYPE (exp))
2320 || !insn_data[icode].operand[0].predicate (target, GET_MODE (target)))
2321 target = gen_reg_rtx (TYPE_MODE (TREE_TYPE (exp)));
2323 gcc_assert (insn_data[icode].operand[0].predicate
2324 (target, GET_MODE (target)));
2326 /* Wrap the computation of the argument in a SAVE_EXPR, as we may
2327 need to expand the argument again. This way, we will not perform
2328 side-effects more the once. */
2329 CALL_EXPR_ARG (exp, 0) = arg = builtin_save_expr (arg);
2331 op0 = expand_expr (arg, subtarget, VOIDmode, EXPAND_NORMAL);
2333 if (mode != GET_MODE (op0))
2334 op0 = convert_to_mode (mode, op0, 0);
2336 /* Compute into TARGET.
2337 Set TARGET to wherever the result comes back. */
2338 if (maybe_emit_unop_insn (icode, target, op0, UNKNOWN))
2340 delete_insns_since (last);
2341 CALL_EXPR_ARG (exp, 0) = orig_arg;
2347 /* Expand a call to the builtin sincos math function.
2348 Return NULL_RTX if a normal call should be emitted rather than expanding the
2349 function in-line. EXP is the expression that is a call to the builtin
2353 expand_builtin_sincos (tree exp)
2355 rtx op0, op1, op2, target1, target2;
2356 enum machine_mode mode;
2357 tree arg, sinp, cosp;
2359 location_t loc = EXPR_LOCATION (exp);
2361 if (!validate_arglist (exp, REAL_TYPE,
2362 POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
2365 arg = CALL_EXPR_ARG (exp, 0);
2366 sinp = CALL_EXPR_ARG (exp, 1);
2367 cosp = CALL_EXPR_ARG (exp, 2);
2369 /* Make a suitable register to place result in. */
2370 mode = TYPE_MODE (TREE_TYPE (arg));
2372 /* Check if sincos insn is available, otherwise emit the call. */
2373 if (optab_handler (sincos_optab, mode)->insn_code == CODE_FOR_nothing)
2376 target1 = gen_reg_rtx (mode);
2377 target2 = gen_reg_rtx (mode);
2379 op0 = expand_normal (arg);
2380 op1 = expand_normal (build_fold_indirect_ref_loc (loc, sinp));
2381 op2 = expand_normal (build_fold_indirect_ref_loc (loc, cosp));
2383 /* Compute into target1 and target2.
2384 Set TARGET to wherever the result comes back. */
2385 result = expand_twoval_unop (sincos_optab, op0, target2, target1, 0);
2386 gcc_assert (result);
2388 /* Move target1 and target2 to the memory locations indicated
2390 emit_move_insn (op1, target1);
2391 emit_move_insn (op2, target2);
2396 /* Expand a call to the internal cexpi builtin to the sincos math function.
2397 EXP is the expression that is a call to the builtin function; if convenient,
2398 the result should be placed in TARGET. SUBTARGET may be used as the target
2399 for computing one of EXP's operands. */
2402 expand_builtin_cexpi (tree exp, rtx target, rtx subtarget)
2404 tree fndecl = get_callee_fndecl (exp);
2406 enum machine_mode mode;
2408 location_t loc = EXPR_LOCATION (exp);
2410 if (!validate_arglist (exp, REAL_TYPE, VOID_TYPE))
2413 arg = CALL_EXPR_ARG (exp, 0);
2414 type = TREE_TYPE (arg);
2415 mode = TYPE_MODE (TREE_TYPE (arg));
2417 /* Try expanding via a sincos optab, fall back to emitting a libcall
2418 to sincos or cexp. We are sure we have sincos or cexp because cexpi
2419 is only generated from sincos, cexp or if we have either of them. */
2420 if (optab_handler (sincos_optab, mode)->insn_code != CODE_FOR_nothing)
2422 op1 = gen_reg_rtx (mode);
2423 op2 = gen_reg_rtx (mode);
2425 op0 = expand_expr (arg, subtarget, VOIDmode, EXPAND_NORMAL);
2427 /* Compute into op1 and op2. */
2428 expand_twoval_unop (sincos_optab, op0, op2, op1, 0);
2430 else if (TARGET_HAS_SINCOS)
2432 tree call, fn = NULL_TREE;
2436 if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_CEXPIF)
2437 fn = built_in_decls[BUILT_IN_SINCOSF];
2438 else if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_CEXPI)
2439 fn = built_in_decls[BUILT_IN_SINCOS];
2440 else if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_CEXPIL)
2441 fn = built_in_decls[BUILT_IN_SINCOSL];
2445 op1 = assign_temp (TREE_TYPE (arg), 0, 1, 1);
2446 op2 = assign_temp (TREE_TYPE (arg), 0, 1, 1);
2447 op1a = copy_to_mode_reg (Pmode, XEXP (op1, 0));
2448 op2a = copy_to_mode_reg (Pmode, XEXP (op2, 0));
2449 top1 = make_tree (build_pointer_type (TREE_TYPE (arg)), op1a);
2450 top2 = make_tree (build_pointer_type (TREE_TYPE (arg)), op2a);
2452 /* Make sure not to fold the sincos call again. */
2453 call = build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (fn)), fn);
2454 expand_normal (build_call_nary (TREE_TYPE (TREE_TYPE (fn)),
2455 call, 3, arg, top1, top2));
2459 tree call, fn = NULL_TREE, narg;
2460 tree ctype = build_complex_type (type);
2462 if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_CEXPIF)
2463 fn = built_in_decls[BUILT_IN_CEXPF];
2464 else if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_CEXPI)
2465 fn = built_in_decls[BUILT_IN_CEXP];
2466 else if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_CEXPIL)
2467 fn = built_in_decls[BUILT_IN_CEXPL];
2471 /* If we don't have a decl for cexp create one. This is the
2472 friendliest fallback if the user calls __builtin_cexpi
2473 without full target C99 function support. */
2474 if (fn == NULL_TREE)
2477 const char *name = NULL;
2479 if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_CEXPIF)
2481 else if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_CEXPI)
2483 else if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_CEXPIL)
2486 fntype = build_function_type_list (ctype, ctype, NULL_TREE);
2487 fn = build_fn_decl (name, fntype);
2490 narg = fold_build2_loc (loc, COMPLEX_EXPR, ctype,
2491 build_real (type, dconst0), arg);
2493 /* Make sure not to fold the cexp call again. */
2494 call = build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (fn)), fn);
2495 return expand_expr (build_call_nary (ctype, call, 1, narg),
2496 target, VOIDmode, EXPAND_NORMAL);
2499 /* Now build the proper return type. */
2500 return expand_expr (build2 (COMPLEX_EXPR, build_complex_type (type),
2501 make_tree (TREE_TYPE (arg), op2),
2502 make_tree (TREE_TYPE (arg), op1)),
2503 target, VOIDmode, EXPAND_NORMAL);
2506 /* Conveniently construct a function call expression. FNDECL names the
2507 function to be called, N is the number of arguments, and the "..."
2508 parameters are the argument expressions. Unlike build_call_exr
2509 this doesn't fold the call, hence it will always return a CALL_EXPR. */
2512 build_call_nofold_loc (location_t loc, tree fndecl, int n, ...)
2515 tree fntype = TREE_TYPE (fndecl);
2516 tree fn = build1 (ADDR_EXPR, build_pointer_type (fntype), fndecl);
2519 fn = build_call_valist (TREE_TYPE (fntype), fn, n, ap);
2521 SET_EXPR_LOCATION (fn, loc);
2524 #define build_call_nofold(...) \
2525 build_call_nofold_loc (UNKNOWN_LOCATION, __VA_ARGS__)
2527 /* Expand a call to one of the builtin rounding functions gcc defines
2528 as an extension (lfloor and lceil). As these are gcc extensions we
2529 do not need to worry about setting errno to EDOM.
2530 If expanding via optab fails, lower expression to (int)(floor(x)).
2531 EXP is the expression that is a call to the builtin function;
2532 if convenient, the result should be placed in TARGET. */
2535 expand_builtin_int_roundingfn (tree exp, rtx target)
2537 convert_optab builtin_optab;
2538 rtx op0, insns, tmp;
2539 tree fndecl = get_callee_fndecl (exp);
2540 enum built_in_function fallback_fn;
2541 tree fallback_fndecl;
2542 enum machine_mode mode;
2545 if (!validate_arglist (exp, REAL_TYPE, VOID_TYPE))
2548 arg = CALL_EXPR_ARG (exp, 0);
2550 switch (DECL_FUNCTION_CODE (fndecl))
2552 CASE_FLT_FN (BUILT_IN_LCEIL):
2553 CASE_FLT_FN (BUILT_IN_LLCEIL):
2554 builtin_optab = lceil_optab;
2555 fallback_fn = BUILT_IN_CEIL;
2558 CASE_FLT_FN (BUILT_IN_LFLOOR):
2559 CASE_FLT_FN (BUILT_IN_LLFLOOR):
2560 builtin_optab = lfloor_optab;
2561 fallback_fn = BUILT_IN_FLOOR;
2568 /* Make a suitable register to place result in. */
2569 mode = TYPE_MODE (TREE_TYPE (exp));
2571 target = gen_reg_rtx (mode);
2573 /* Wrap the computation of the argument in a SAVE_EXPR, as we may
2574 need to expand the argument again. This way, we will not perform
2575 side-effects more the once. */
2576 CALL_EXPR_ARG (exp, 0) = arg = builtin_save_expr (arg);
2578 op0 = expand_expr (arg, NULL, VOIDmode, EXPAND_NORMAL);
2582 /* Compute into TARGET. */
2583 if (expand_sfix_optab (target, op0, builtin_optab))
2585 /* Output the entire sequence. */
2586 insns = get_insns ();
2592 /* If we were unable to expand via the builtin, stop the sequence
2593 (without outputting the insns). */
2596 /* Fall back to floating point rounding optab. */
2597 fallback_fndecl = mathfn_built_in (TREE_TYPE (arg), fallback_fn);
2599 /* For non-C99 targets we may end up without a fallback fndecl here
2600 if the user called __builtin_lfloor directly. In this case emit
2601 a call to the floor/ceil variants nevertheless. This should result
2602 in the best user experience for not full C99 targets. */
2603 if (fallback_fndecl == NULL_TREE)
2606 const char *name = NULL;
2608 switch (DECL_FUNCTION_CODE (fndecl))
2610 case BUILT_IN_LCEIL:
2611 case BUILT_IN_LLCEIL:
2614 case BUILT_IN_LCEILF:
2615 case BUILT_IN_LLCEILF:
2618 case BUILT_IN_LCEILL:
2619 case BUILT_IN_LLCEILL:
2622 case BUILT_IN_LFLOOR:
2623 case BUILT_IN_LLFLOOR:
2626 case BUILT_IN_LFLOORF:
2627 case BUILT_IN_LLFLOORF:
2630 case BUILT_IN_LFLOORL:
2631 case BUILT_IN_LLFLOORL:
2638 fntype = build_function_type_list (TREE_TYPE (arg),
2639 TREE_TYPE (arg), NULL_TREE);
2640 fallback_fndecl = build_fn_decl (name, fntype);
2643 exp = build_call_nofold (fallback_fndecl, 1, arg);
2645 tmp = expand_normal (exp);
2647 /* Truncate the result of floating point optab to integer
2648 via expand_fix (). */
2649 target = gen_reg_rtx (mode);
2650 expand_fix (target, tmp, 0);
2655 /* Expand a call to one of the builtin math functions doing integer
2657 Return 0 if a normal call should be emitted rather than expanding the
2658 function in-line. EXP is the expression that is a call to the builtin
2659 function; if convenient, the result should be placed in TARGET. */
2662 expand_builtin_int_roundingfn_2 (tree exp, rtx target)
2664 convert_optab builtin_optab;
2666 tree fndecl = get_callee_fndecl (exp);
2668 enum machine_mode mode;
2670 /* There's no easy way to detect the case we need to set EDOM. */
2671 if (flag_errno_math)
2674 if (!validate_arglist (exp, REAL_TYPE, VOID_TYPE))
2677 arg = CALL_EXPR_ARG (exp, 0);
2679 switch (DECL_FUNCTION_CODE (fndecl))
2681 CASE_FLT_FN (BUILT_IN_LRINT):
2682 CASE_FLT_FN (BUILT_IN_LLRINT):
2683 builtin_optab = lrint_optab; break;
2684 CASE_FLT_FN (BUILT_IN_LROUND):
2685 CASE_FLT_FN (BUILT_IN_LLROUND):
2686 builtin_optab = lround_optab; break;
2691 /* Make a suitable register to place result in. */
2692 mode = TYPE_MODE (TREE_TYPE (exp));
2694 target = gen_reg_rtx (mode);
2696 /* Wrap the computation of the argument in a SAVE_EXPR, as we may
2697 need to expand the argument again. This way, we will not perform
2698 side-effects more the once. */
2699 CALL_EXPR_ARG (exp, 0) = arg = builtin_save_expr (arg);
2701 op0 = expand_expr (arg, NULL, VOIDmode, EXPAND_NORMAL);
2705 if (expand_sfix_optab (target, op0, builtin_optab))
2707 /* Output the entire sequence. */
2708 insns = get_insns ();
2714 /* If we were unable to expand via the builtin, stop the sequence
2715 (without outputting the insns) and call to the library function
2716 with the stabilized argument list. */
2719 target = expand_call (exp, target, target == const0_rtx);
2724 /* To evaluate powi(x,n), the floating point value x raised to the
2725 constant integer exponent n, we use a hybrid algorithm that
2726 combines the "window method" with look-up tables. For an
2727 introduction to exponentiation algorithms and "addition chains",
2728 see section 4.6.3, "Evaluation of Powers" of Donald E. Knuth,
2729 "Seminumerical Algorithms", Vol. 2, "The Art of Computer Programming",
2730 3rd Edition, 1998, and Daniel M. Gordon, "A Survey of Fast Exponentiation
2731 Methods", Journal of Algorithms, Vol. 27, pp. 129-146, 1998. */
2733 /* Provide a default value for POWI_MAX_MULTS, the maximum number of
2734 multiplications to inline before calling the system library's pow
2735 function. powi(x,n) requires at worst 2*bits(n)-2 multiplications,
2736 so this default never requires calling pow, powf or powl. */
2738 #ifndef POWI_MAX_MULTS
2739 #define POWI_MAX_MULTS (2*HOST_BITS_PER_WIDE_INT-2)
2742 /* The size of the "optimal power tree" lookup table. All
2743 exponents less than this value are simply looked up in the
2744 powi_table below. This threshold is also used to size the
2745 cache of pseudo registers that hold intermediate results. */
2746 #define POWI_TABLE_SIZE 256
2748 /* The size, in bits of the window, used in the "window method"
2749 exponentiation algorithm. This is equivalent to a radix of
2750 (1<<POWI_WINDOW_SIZE) in the corresponding "m-ary method". */
2751 #define POWI_WINDOW_SIZE 3
2753 /* The following table is an efficient representation of an
2754 "optimal power tree". For each value, i, the corresponding
2755 value, j, in the table states than an optimal evaluation
2756 sequence for calculating pow(x,i) can be found by evaluating
2757 pow(x,j)*pow(x,i-j). An optimal power tree for the first
2758 100 integers is given in Knuth's "Seminumerical algorithms". */
2760 static const unsigned char powi_table[POWI_TABLE_SIZE] =
2762 0, 1, 1, 2, 2, 3, 3, 4, /* 0 - 7 */
2763 4, 6, 5, 6, 6, 10, 7, 9, /* 8 - 15 */
2764 8, 16, 9, 16, 10, 12, 11, 13, /* 16 - 23 */
2765 12, 17, 13, 18, 14, 24, 15, 26, /* 24 - 31 */
2766 16, 17, 17, 19, 18, 33, 19, 26, /* 32 - 39 */
2767 20, 25, 21, 40, 22, 27, 23, 44, /* 40 - 47 */
2768 24, 32, 25, 34, 26, 29, 27, 44, /* 48 - 55 */
2769 28, 31, 29, 34, 30, 60, 31, 36, /* 56 - 63 */
2770 32, 64, 33, 34, 34, 46, 35, 37, /* 64 - 71 */
2771 36, 65, 37, 50, 38, 48, 39, 69, /* 72 - 79 */
2772 40, 49, 41, 43, 42, 51, 43, 58, /* 80 - 87 */
2773 44, 64, 45, 47, 46, 59, 47, 76, /* 88 - 95 */
2774 48, 65, 49, 66, 50, 67, 51, 66, /* 96 - 103 */
2775 52, 70, 53, 74, 54, 104, 55, 74, /* 104 - 111 */
2776 56, 64, 57, 69, 58, 78, 59, 68, /* 112 - 119 */
2777 60, 61, 61, 80, 62, 75, 63, 68, /* 120 - 127 */
2778 64, 65, 65, 128, 66, 129, 67, 90, /* 128 - 135 */
2779 68, 73, 69, 131, 70, 94, 71, 88, /* 136 - 143 */
2780 72, 128, 73, 98, 74, 132, 75, 121, /* 144 - 151 */
2781 76, 102, 77, 124, 78, 132, 79, 106, /* 152 - 159 */
2782 80, 97, 81, 160, 82, 99, 83, 134, /* 160 - 167 */
2783 84, 86, 85, 95, 86, 160, 87, 100, /* 168 - 175 */
2784 88, 113, 89, 98, 90, 107, 91, 122, /* 176 - 183 */
2785 92, 111, 93, 102, 94, 126, 95, 150, /* 184 - 191 */
2786 96, 128, 97, 130, 98, 133, 99, 195, /* 192 - 199 */
2787 100, 128, 101, 123, 102, 164, 103, 138, /* 200 - 207 */
2788 104, 145, 105, 146, 106, 109, 107, 149, /* 208 - 215 */
2789 108, 200, 109, 146, 110, 170, 111, 157, /* 216 - 223 */
2790 112, 128, 113, 130, 114, 182, 115, 132, /* 224 - 231 */
2791 116, 200, 117, 132, 118, 158, 119, 206, /* 232 - 239 */
2792 120, 240, 121, 162, 122, 147, 123, 152, /* 240 - 247 */
2793 124, 166, 125, 214, 126, 138, 127, 153, /* 248 - 255 */
2797 /* Return the number of multiplications required to calculate
2798 powi(x,n) where n is less than POWI_TABLE_SIZE. This is a
2799 subroutine of powi_cost. CACHE is an array indicating
2800 which exponents have already been calculated. */
2803 powi_lookup_cost (unsigned HOST_WIDE_INT n, bool *cache)
2805 /* If we've already calculated this exponent, then this evaluation
2806 doesn't require any additional multiplications. */
2811 return powi_lookup_cost (n - powi_table[n], cache)
2812 + powi_lookup_cost (powi_table[n], cache) + 1;
2815 /* Return the number of multiplications required to calculate
2816 powi(x,n) for an arbitrary x, given the exponent N. This
2817 function needs to be kept in sync with expand_powi below. */
2820 powi_cost (HOST_WIDE_INT n)
2822 bool cache[POWI_TABLE_SIZE];
2823 unsigned HOST_WIDE_INT digit;
2824 unsigned HOST_WIDE_INT val;
2830 /* Ignore the reciprocal when calculating the cost. */
2831 val = (n < 0) ? -n : n;
2833 /* Initialize the exponent cache. */
2834 memset (cache, 0, POWI_TABLE_SIZE * sizeof (bool));
2839 while (val >= POWI_TABLE_SIZE)
2843 digit = val & ((1 << POWI_WINDOW_SIZE) - 1);
2844 result += powi_lookup_cost (digit, cache)
2845 + POWI_WINDOW_SIZE + 1;
2846 val >>= POWI_WINDOW_SIZE;
2855 return result + powi_lookup_cost (val, cache);
2858 /* Recursive subroutine of expand_powi. This function takes the array,
2859 CACHE, of already calculated exponents and an exponent N and returns
2860 an RTX that corresponds to CACHE[1]**N, as calculated in mode MODE. */
2863 expand_powi_1 (enum machine_mode mode, unsigned HOST_WIDE_INT n, rtx *cache)
2865 unsigned HOST_WIDE_INT digit;
2869 if (n < POWI_TABLE_SIZE)
2874 target = gen_reg_rtx (mode);
2877 op0 = expand_powi_1 (mode, n - powi_table[n], cache);
2878 op1 = expand_powi_1 (mode, powi_table[n], cache);
2882 target = gen_reg_rtx (mode);
2883 digit = n & ((1 << POWI_WINDOW_SIZE) - 1);
2884 op0 = expand_powi_1 (mode, n - digit, cache);
2885 op1 = expand_powi_1 (mode, digit, cache);
2889 target = gen_reg_rtx (mode);
2890 op0 = expand_powi_1 (mode, n >> 1, cache);
2894 result = expand_mult (mode, op0, op1, target, 0);
2895 if (result != target)
2896 emit_move_insn (target, result);
2900 /* Expand the RTL to evaluate powi(x,n) in mode MODE. X is the
2901 floating point operand in mode MODE, and N is the exponent. This
2902 function needs to be kept in sync with powi_cost above. */
2905 expand_powi (rtx x, enum machine_mode mode, HOST_WIDE_INT n)
2907 rtx cache[POWI_TABLE_SIZE];
2911 return CONST1_RTX (mode);
2913 memset (cache, 0, sizeof (cache));
2916 result = expand_powi_1 (mode, (n < 0) ? -n : n, cache);
2918 /* If the original exponent was negative, reciprocate the result. */
2920 result = expand_binop (mode, sdiv_optab, CONST1_RTX (mode),
2921 result, NULL_RTX, 0, OPTAB_LIB_WIDEN);
2926 /* Fold a builtin function call to pow, powf, or powl into a series of sqrts or
2927 cbrts. Return NULL_RTX if no simplification can be made or expand the tree
2928 if we can simplify it. */
2930 expand_builtin_pow_root (location_t loc, tree arg0, tree arg1, tree type,
2933 if (TREE_CODE (arg1) == REAL_CST
2934 && !TREE_OVERFLOW (arg1)
2935 && flag_unsafe_math_optimizations)
2937 enum machine_mode mode = TYPE_MODE (type);
2938 tree sqrtfn = mathfn_built_in (type, BUILT_IN_SQRT);
2939 tree cbrtfn = mathfn_built_in (type, BUILT_IN_CBRT);
2940 REAL_VALUE_TYPE c = TREE_REAL_CST (arg1);
2941 tree op = NULL_TREE;
2945 /* Optimize pow (x, 0.5) into sqrt. */
2946 if (REAL_VALUES_EQUAL (c, dconsthalf))
2947 op = build_call_nofold_loc (loc, sqrtfn, 1, arg0);
2951 REAL_VALUE_TYPE dconst1_4 = dconst1;
2952 REAL_VALUE_TYPE dconst3_4;
2953 SET_REAL_EXP (&dconst1_4, REAL_EXP (&dconst1_4) - 2);
2955 real_from_integer (&dconst3_4, VOIDmode, 3, 0, 0);
2956 SET_REAL_EXP (&dconst3_4, REAL_EXP (&dconst3_4) - 2);
2958 /* Optimize pow (x, 0.25) into sqrt (sqrt (x)). Assume on most
2959 machines that a builtin sqrt instruction is smaller than a
2960 call to pow with 0.25, so do this optimization even if
2962 if (REAL_VALUES_EQUAL (c, dconst1_4))
2964 op = build_call_nofold_loc (loc, sqrtfn, 1, arg0);
2965 op = build_call_nofold_loc (loc, sqrtfn, 1, op);
2968 /* Optimize pow (x, 0.75) = sqrt (x) * sqrt (sqrt (x)) unless we
2969 are optimizing for space. */
2970 else if (optimize_insn_for_speed_p ()
2971 && !TREE_SIDE_EFFECTS (arg0)
2972 && REAL_VALUES_EQUAL (c, dconst3_4))
2974 tree sqrt1 = build_call_expr_loc (loc, sqrtfn, 1, arg0);
2975 tree sqrt2 = builtin_save_expr (sqrt1);
2976 tree sqrt3 = build_call_expr_loc (loc, sqrtfn, 1, sqrt1);
2977 op = fold_build2_loc (loc, MULT_EXPR, type, sqrt2, sqrt3);
2982 /* Check whether we can do cbrt insstead of pow (x, 1./3.) and
2983 cbrt/sqrts instead of pow (x, 1./6.). */
2985 && (tree_expr_nonnegative_p (arg0) || !HONOR_NANS (mode)))
2987 /* First try 1/3. */
2988 REAL_VALUE_TYPE dconst1_3
2989 = real_value_truncate (mode, dconst_third ());
2991 if (REAL_VALUES_EQUAL (c, dconst1_3))
2992 op = build_call_nofold_loc (loc, cbrtfn, 1, arg0);
2995 else if (optimize_insn_for_speed_p ())
2997 REAL_VALUE_TYPE dconst1_6 = dconst1_3;
2998 SET_REAL_EXP (&dconst1_6, REAL_EXP (&dconst1_6) - 1);
3000 if (REAL_VALUES_EQUAL (c, dconst1_6))
3002 op = build_call_nofold_loc (loc, sqrtfn, 1, arg0);
3003 op = build_call_nofold_loc (loc, cbrtfn, 1, op);
3009 return expand_expr (op, subtarget, mode, EXPAND_NORMAL);
3015 /* Expand a call to the pow built-in mathematical function. Return NULL_RTX if
3016 a normal call should be emitted rather than expanding the function
3017 in-line. EXP is the expression that is a call to the builtin
3018 function; if convenient, the result should be placed in TARGET. */
3021 expand_builtin_pow (tree exp, rtx target, rtx subtarget)
3025 tree type = TREE_TYPE (exp);
3026 REAL_VALUE_TYPE cint, c, c2;
3029 enum machine_mode mode = TYPE_MODE (type);
3031 if (! validate_arglist (exp, REAL_TYPE, REAL_TYPE, VOID_TYPE))
3034 arg0 = CALL_EXPR_ARG (exp, 0);
3035 arg1 = CALL_EXPR_ARG (exp, 1);
3037 if (TREE_CODE (arg1) != REAL_CST
3038 || TREE_OVERFLOW (arg1))
3039 return expand_builtin_mathfn_2 (exp, target, subtarget);
3041 /* Handle constant exponents. */
3043 /* For integer valued exponents we can expand to an optimal multiplication
3044 sequence using expand_powi. */
3045 c = TREE_REAL_CST (arg1);
3046 n = real_to_integer (&c);
3047 real_from_integer (&cint, VOIDmode, n, n < 0 ? -1 : 0, 0);
3048 if (real_identical (&c, &cint)
3049 && ((n >= -1 && n <= 2)
3050 || (flag_unsafe_math_optimizations
3051 && optimize_insn_for_speed_p ()
3052 && powi_cost (n) <= POWI_MAX_MULTS)))
3054 op = expand_expr (arg0, subtarget, VOIDmode, EXPAND_NORMAL);
3057 op = force_reg (mode, op);
3058 op = expand_powi (op, mode, n);
3063 narg0 = builtin_save_expr (arg0);
3065 /* If the exponent is not integer valued, check if it is half of an integer.
3066 In this case we can expand to sqrt (x) * x**(n/2). */
3067 fn = mathfn_built_in (type, BUILT_IN_SQRT);
3068 if (fn != NULL_TREE)
3070 real_arithmetic (&c2, MULT_EXPR, &c, &dconst2);
3071 n = real_to_integer (&c2);
3072 real_from_integer (&cint, VOIDmode, n, n < 0 ? -1 : 0, 0);
3073 if (real_identical (&c2, &cint)
3074 && ((flag_unsafe_math_optimizations
3075 && optimize_insn_for_speed_p ()
3076 && powi_cost (n/2) <= POWI_MAX_MULTS)
3077 /* Even the c == 0.5 case cannot be done unconditionally
3078 when we need to preserve signed zeros, as
3079 pow (-0, 0.5) is +0, while sqrt(-0) is -0. */
3080 || (!HONOR_SIGNED_ZEROS (mode) && n == 1)
3081 /* For c == 1.5 we can assume that x * sqrt (x) is always
3082 smaller than pow (x, 1.5) if sqrt will not be expanded
3085 && (optab_handler (sqrt_optab, mode)->insn_code
3086 != CODE_FOR_nothing))))
3088 tree call_expr = build_call_nofold (fn, 1, narg0);
3089 /* Use expand_expr in case the newly built call expression
3090 was folded to a non-call. */
3091 op = expand_expr (call_expr, subtarget, mode, EXPAND_NORMAL);
3094 op2 = expand_expr (narg0, subtarget, VOIDmode, EXPAND_NORMAL);
3095 op2 = force_reg (mode, op2);
3096 op2 = expand_powi (op2, mode, abs (n / 2));
3097 op = expand_simple_binop (mode, MULT, op, op2, NULL_RTX,
3098 0, OPTAB_LIB_WIDEN);
3099 /* If the original exponent was negative, reciprocate the
3102 op = expand_binop (mode, sdiv_optab, CONST1_RTX (mode),
3103 op, NULL_RTX, 0, OPTAB_LIB_WIDEN);
3109 /* Check whether we can do a series of sqrt or cbrt's instead of the pow
3111 op = expand_builtin_pow_root (EXPR_LOCATION (exp), arg0, arg1, type,
3116 /* Try if the exponent is a third of an integer. In this case
3117 we can expand to x**(n/3) * cbrt(x)**(n%3). As cbrt (x) is
3118 different from pow (x, 1./3.) due to rounding and behavior
3119 with negative x we need to constrain this transformation to
3120 unsafe math and positive x or finite math. */
3121 fn = mathfn_built_in (type, BUILT_IN_CBRT);
3123 && flag_unsafe_math_optimizations
3124 && (tree_expr_nonnegative_p (arg0)
3125 || !HONOR_NANS (mode)))
3127 REAL_VALUE_TYPE dconst3;
3128 real_from_integer (&dconst3, VOIDmode, 3, 0, 0);
3129 real_arithmetic (&c2, MULT_EXPR, &c, &dconst3);
3130 real_round (&c2, mode, &c2);
3131 n = real_to_integer (&c2);
3132 real_from_integer (&cint, VOIDmode, n, n < 0 ? -1 : 0, 0);
3133 real_arithmetic (&c2, RDIV_EXPR, &cint, &dconst3);
3134 real_convert (&c2, mode, &c2);
3135 if (real_identical (&c2, &c)
3136 && ((optimize_insn_for_speed_p ()
3137 && powi_cost (n/3) <= POWI_MAX_MULTS)
3140 tree call_expr = build_call_nofold (fn, 1,narg0);
3141 op = expand_builtin (call_expr, NULL_RTX, subtarget, mode, 0);
3142 if (abs (n) % 3 == 2)
3143 op = expand_simple_binop (mode, MULT, op, op, op,
3144 0, OPTAB_LIB_WIDEN);
3147 op2 = expand_expr (narg0, subtarget, VOIDmode, EXPAND_NORMAL);
3148 op2 = force_reg (mode, op2);
3149 op2 = expand_powi (op2, mode, abs (n / 3));
3150 op = expand_simple_binop (mode, MULT, op, op2, NULL_RTX,
3151 0, OPTAB_LIB_WIDEN);
3152 /* If the original exponent was negative, reciprocate the
3155 op = expand_binop (mode, sdiv_optab, CONST1_RTX (mode),
3156 op, NULL_RTX, 0, OPTAB_LIB_WIDEN);
3162 /* Fall back to optab expansion. */
3163 return expand_builtin_mathfn_2 (exp, target, subtarget);
3166 /* Expand a call to the powi built-in mathematical function. Return NULL_RTX if
3167 a normal call should be emitted rather than expanding the function
3168 in-line. EXP is the expression that is a call to the builtin
3169 function; if convenient, the result should be placed in TARGET. */
3172 expand_builtin_powi (tree exp, rtx target, rtx subtarget)
3176 enum machine_mode mode;
3177 enum machine_mode mode2;
3179 if (! validate_arglist (exp, REAL_TYPE, INTEGER_TYPE, VOID_TYPE))
3182 arg0 = CALL_EXPR_ARG (exp, 0);
3183 arg1 = CALL_EXPR_ARG (exp, 1);
3184 mode = TYPE_MODE (TREE_TYPE (exp));
3186 /* Handle constant power. */
3188 if (TREE_CODE (arg1) == INTEGER_CST
3189 && !TREE_OVERFLOW (arg1))
3191 HOST_WIDE_INT n = TREE_INT_CST_LOW (arg1);
3193 /* If the exponent is -1, 0, 1 or 2, then expand_powi is exact.
3194 Otherwise, check the number of multiplications required. */
3195 if ((TREE_INT_CST_HIGH (arg1) == 0
3196 || TREE_INT_CST_HIGH (arg1) == -1)
3197 && ((n >= -1 && n <= 2)
3198 || (optimize_insn_for_speed_p ()
3199 && powi_cost (n) <= POWI_MAX_MULTS)))
3201 op0 = expand_expr (arg0, subtarget, VOIDmode, EXPAND_NORMAL);
3202 op0 = force_reg (mode, op0);
3203 return expand_powi (op0, mode, n);
3207 /* Emit a libcall to libgcc. */
3209 /* Mode of the 2nd argument must match that of an int. */
3210 mode2 = mode_for_size (INT_TYPE_SIZE, MODE_INT, 0);
3212 if (target == NULL_RTX)
3213 target = gen_reg_rtx (mode);
3215 op0 = expand_expr (arg0, subtarget, mode, EXPAND_NORMAL);
3216 if (GET_MODE (op0) != mode)
3217 op0 = convert_to_mode (mode, op0, 0);
3218 op1 = expand_expr (arg1, NULL_RTX, mode2, EXPAND_NORMAL);
3219 if (GET_MODE (op1) != mode2)
3220 op1 = convert_to_mode (mode2, op1, 0);
3222 target = emit_library_call_value (optab_libfunc (powi_optab, mode),
3223 target, LCT_CONST, mode, 2,
3224 op0, mode, op1, mode2);
3229 /* Expand expression EXP which is a call to the strlen builtin. Return
3230 NULL_RTX if we failed the caller should emit a normal call, otherwise
3231 try to get the result in TARGET, if convenient. */
3234 expand_builtin_strlen (tree exp, rtx target,
3235 enum machine_mode target_mode)
3237 if (!validate_arglist (exp, POINTER_TYPE, VOID_TYPE))
3243 tree src = CALL_EXPR_ARG (exp, 0);
3244 rtx result, src_reg, char_rtx, before_strlen;
3245 enum machine_mode insn_mode = target_mode, char_mode;
3246 enum insn_code icode = CODE_FOR_nothing;
3249 /* If the length can be computed at compile-time, return it. */
3250 len = c_strlen (src, 0);
3252 return expand_expr (len, target, target_mode, EXPAND_NORMAL);
3254 /* If the length can be computed at compile-time and is constant
3255 integer, but there are side-effects in src, evaluate
3256 src for side-effects, then return len.
3257 E.g. x = strlen (i++ ? "xfoo" + 1 : "bar");
3258 can be optimized into: i++; x = 3; */
3259 len = c_strlen (src, 1);
3260 if (len && TREE_CODE (len) == INTEGER_CST)
3262 expand_expr (src, const0_rtx, VOIDmode, EXPAND_NORMAL);
3263 return expand_expr (len, target, target_mode, EXPAND_NORMAL);
3266 align = get_pointer_alignment (src, BIGGEST_ALIGNMENT) / BITS_PER_UNIT;
3268 /* If SRC is not a pointer type, don't do this operation inline. */
3272 /* Bail out if we can't compute strlen in the right mode. */
3273 while (insn_mode != VOIDmode)
3275 icode = optab_handler (strlen_optab, insn_mode)->insn_code;
3276 if (icode != CODE_FOR_nothing)
3279 insn_mode = GET_MODE_WIDER_MODE (insn_mode);
3281 if (insn_mode == VOIDmode)
3284 /* Make a place to write the result of the instruction. */
3288 && GET_MODE (result) == insn_mode
3289 && REGNO (result) >= FIRST_PSEUDO_REGISTER))
3290 result = gen_reg_rtx (insn_mode);
3292 /* Make a place to hold the source address. We will not expand
3293 the actual source until we are sure that the expansion will
3294 not fail -- there are trees that cannot be expanded twice. */
3295 src_reg = gen_reg_rtx (Pmode);
3297 /* Mark the beginning of the strlen sequence so we can emit the
3298 source operand later. */
3299 before_strlen = get_last_insn ();
3301 char_rtx = const0_rtx;
3302 char_mode = insn_data[(int) icode].operand[2].mode;
3303 if (! (*insn_data[(int) icode].operand[2].predicate) (char_rtx,
3305 char_rtx = copy_to_mode_reg (char_mode, char_rtx);
3307 pat = GEN_FCN (icode) (result, gen_rtx_MEM (BLKmode, src_reg),
3308 char_rtx, GEN_INT (align));
3313 /* Now that we are assured of success, expand the source. */
3315 pat = expand_expr (src, src_reg, ptr_mode, EXPAND_NORMAL);
3317 emit_move_insn (src_reg, pat);
3322 emit_insn_after (pat, before_strlen);
3324 emit_insn_before (pat, get_insns ());
3326 /* Return the value in the proper mode for this function. */
3327 if (GET_MODE (result) == target_mode)
3329 else if (target != 0)
3330 convert_move (target, result, 0);
3332 target = convert_to_mode (target_mode, result, 0);
3338 /* Callback routine for store_by_pieces. Read GET_MODE_BITSIZE (MODE)
3339 bytes from constant string DATA + OFFSET and return it as target
3343 builtin_memcpy_read_str (void *data, HOST_WIDE_INT offset,
3344 enum machine_mode mode)
3346 const char *str = (const char *) data;
3348 gcc_assert (offset >= 0
3349 && ((unsigned HOST_WIDE_INT) offset + GET_MODE_SIZE (mode)
3350 <= strlen (str) + 1));
3352 return c_readstr (str + offset, mode);
3355 /* Expand a call EXP to the memcpy builtin.
3356 Return NULL_RTX if we failed, the caller should emit a normal call,
3357 otherwise try to get the result in TARGET, if convenient (and in
3358 mode MODE if that's convenient). */
3361 expand_builtin_memcpy (tree exp, rtx target)
3363 if (!validate_arglist (exp,
3364 POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
3368 tree dest = CALL_EXPR_ARG (exp, 0);
3369 tree src = CALL_EXPR_ARG (exp, 1);
3370 tree len = CALL_EXPR_ARG (exp, 2);
3371 const char *src_str;
3372 unsigned int src_align = get_pointer_alignment (src, BIGGEST_ALIGNMENT);
3373 unsigned int dest_align
3374 = get_pointer_alignment (dest, BIGGEST_ALIGNMENT);
3375 rtx dest_mem, src_mem, dest_addr, len_rtx;
3376 HOST_WIDE_INT expected_size = -1;
3377 unsigned int expected_align = 0;
3379 /* If DEST is not a pointer type, call the normal function. */
3380 if (dest_align == 0)
3383 /* If either SRC is not a pointer type, don't do this
3384 operation in-line. */
3388 if (currently_expanding_gimple_stmt)
3389 stringop_block_profile (currently_expanding_gimple_stmt,
3390 &expected_align, &expected_size);
3392 if (expected_align < dest_align)
3393 expected_align = dest_align;
3394 dest_mem = get_memory_rtx (dest, len);
3395 set_mem_align (dest_mem, dest_align);
3396 len_rtx = expand_normal (len);
3397 src_str = c_getstr (src);
3399 /* If SRC is a string constant and block move would be done
3400 by pieces, we can avoid loading the string from memory
3401 and only stored the computed constants. */
3403 && CONST_INT_P (len_rtx)
3404 && (unsigned HOST_WIDE_INT) INTVAL (len_rtx) <= strlen (src_str) + 1
3405 && can_store_by_pieces (INTVAL (len_rtx), builtin_memcpy_read_str,
3406 CONST_CAST (char *, src_str),
3409 dest_mem = store_by_pieces (dest_mem, INTVAL (len_rtx),
3410 builtin_memcpy_read_str,
3411 CONST_CAST (char *, src_str),
3412 dest_align, false, 0);
3413 dest_mem = force_operand (XEXP (dest_mem, 0), target);
3414 dest_mem = convert_memory_address (ptr_mode, dest_mem);
3418 src_mem = get_memory_rtx (src, len);
3419 set_mem_align (src_mem, src_align);
3421 /* Copy word part most expediently. */
3422 dest_addr = emit_block_move_hints (dest_mem, src_mem, len_rtx,
3423 CALL_EXPR_TAILCALL (exp)
3424 ? BLOCK_OP_TAILCALL : BLOCK_OP_NORMAL,
3425 expected_align, expected_size);
3429 dest_addr = force_operand (XEXP (dest_mem, 0), target);
3430 dest_addr = convert_memory_address (ptr_mode, dest_addr);
3436 /* Expand a call EXP to the mempcpy builtin.
3437 Return NULL_RTX if we failed; the caller should emit a normal call,
3438 otherwise try to get the result in TARGET, if convenient (and in
3439 mode MODE if that's convenient). If ENDP is 0 return the
3440 destination pointer, if ENDP is 1 return the end pointer ala
3441 mempcpy, and if ENDP is 2 return the end pointer minus one ala
3445 expand_builtin_mempcpy (tree exp, rtx target, enum machine_mode mode)
3447 if (!validate_arglist (exp,
3448 POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
3452 tree dest = CALL_EXPR_ARG (exp, 0);
3453 tree src = CALL_EXPR_ARG (exp, 1);
3454 tree len = CALL_EXPR_ARG (exp, 2);
3455 return expand_builtin_mempcpy_args (dest, src, len,
3456 target, mode, /*endp=*/ 1);
3460 /* Helper function to do the actual work for expand_builtin_mempcpy. The
3461 arguments to the builtin_mempcpy call DEST, SRC, and LEN are broken out
3462 so that this can also be called without constructing an actual CALL_EXPR.
3463 The other arguments and return value are the same as for
3464 expand_builtin_mempcpy. */
3467 expand_builtin_mempcpy_args (tree dest, tree src, tree len,
3468 rtx target, enum machine_mode mode, int endp)
3470 /* If return value is ignored, transform mempcpy into memcpy. */
3471 if (target == const0_rtx && implicit_built_in_decls[BUILT_IN_MEMCPY])
3473 tree fn = implicit_built_in_decls[BUILT_IN_MEMCPY];
3474 tree result = build_call_nofold (fn, 3, dest, src, len);
3475 return expand_expr (result, target, mode, EXPAND_NORMAL);
3479 const char *src_str;
3480 unsigned int src_align = get_pointer_alignment (src, BIGGEST_ALIGNMENT);
3481 unsigned int dest_align
3482 = get_pointer_alignment (dest, BIGGEST_ALIGNMENT);
3483 rtx dest_mem, src_mem, len_rtx;
3485 /* If either SRC or DEST is not a pointer type, don't do this
3486 operation in-line. */
3487 if (dest_align == 0 || src_align == 0)
3490 /* If LEN is not constant, call the normal function. */
3491 if (! host_integerp (len, 1))
3494 len_rtx = expand_normal (len);
3495 src_str = c_getstr (src);
3497 /* If SRC is a string constant and block move would be done
3498 by pieces, we can avoid loading the string from memory
3499 and only stored the computed constants. */
3501 && CONST_INT_P (len_rtx)
3502 && (unsigned HOST_WIDE_INT) INTVAL (len_rtx) <= strlen (src_str) + 1
3503 && can_store_by_pieces (INTVAL (len_rtx), builtin_memcpy_read_str,
3504 CONST_CAST (char *, src_str),
3507 dest_mem = get_memory_rtx (dest, len);
3508 set_mem_align (dest_mem, dest_align);
3509 dest_mem = store_by_pieces (dest_mem, INTVAL (len_rtx),
3510 builtin_memcpy_read_str,
3511 CONST_CAST (char *, src_str),
3512 dest_align, false, endp);
3513 dest_mem = force_operand (XEXP (dest_mem, 0), NULL_RTX);
3514 dest_mem = convert_memory_address (ptr_mode, dest_mem);
3518 if (CONST_INT_P (len_rtx)
3519 && can_move_by_pieces (INTVAL (len_rtx),
3520 MIN (dest_align, src_align)))
3522 dest_mem = get_memory_rtx (dest, len);
3523 set_mem_align (dest_mem, dest_align);
3524 src_mem = get_memory_rtx (src, len);
3525 set_mem_align (src_mem, src_align);
3526 dest_mem = move_by_pieces (dest_mem, src_mem, INTVAL (len_rtx),
3527 MIN (dest_align, src_align), endp);
3528 dest_mem = force_operand (XEXP (dest_mem, 0), NULL_RTX);
3529 dest_mem = convert_memory_address (ptr_mode, dest_mem);
3538 # define HAVE_movstr 0
3539 # define CODE_FOR_movstr CODE_FOR_nothing
3542 /* Expand into a movstr instruction, if one is available. Return NULL_RTX if
3543 we failed, the caller should emit a normal call, otherwise try to
3544 get the result in TARGET, if convenient. If ENDP is 0 return the
3545 destination pointer, if ENDP is 1 return the end pointer ala
3546 mempcpy, and if ENDP is 2 return the end pointer minus one ala
3550 expand_movstr (tree dest, tree src, rtx target, int endp)
3556 const struct insn_data * data;
3561 dest_mem = get_memory_rtx (dest, NULL);
3562 src_mem = get_memory_rtx (src, NULL);
3565 target = force_reg (Pmode, XEXP (dest_mem, 0));
3566 dest_mem = replace_equiv_address (dest_mem, target);
3567 end = gen_reg_rtx (Pmode);
3571 if (target == 0 || target == const0_rtx)
3573 end = gen_reg_rtx (Pmode);
3581 data = insn_data + CODE_FOR_movstr;
3583 if (data->operand[0].mode != VOIDmode)
3584 end = gen_lowpart (data->operand[0].mode, end);
3586 insn = data->genfun (end, dest_mem, src_mem);
3592 /* movstr is supposed to set end to the address of the NUL
3593 terminator. If the caller requested a mempcpy-like return value,
3595 if (endp == 1 && target != const0_rtx)
3597 rtx tem = plus_constant (gen_lowpart (GET_MODE (target), end), 1);
3598 emit_move_insn (target, force_operand (tem, NULL_RTX));
3604 /* Expand expression EXP, which is a call to the strcpy builtin. Return
3605 NULL_RTX if we failed the caller should emit a normal call, otherwise
3606 try to get the result in TARGET, if convenient (and in mode MODE if that's
3610 expand_builtin_strcpy (tree exp, rtx target)
3612 if (validate_arglist (exp, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
3614 tree dest = CALL_EXPR_ARG (exp, 0);
3615 tree src = CALL_EXPR_ARG (exp, 1);
3616 return expand_builtin_strcpy_args (dest, src, target);
3621 /* Helper function to do the actual work for expand_builtin_strcpy. The
3622 arguments to the builtin_strcpy call DEST and SRC are broken out
3623 so that this can also be called without constructing an actual CALL_EXPR.
3624 The other arguments and return value are the same as for
3625 expand_builtin_strcpy. */
3628 expand_builtin_strcpy_args (tree dest, tree src, rtx target)
3630 return expand_movstr (dest, src, target, /*endp=*/0);
3633 /* Expand a call EXP to the stpcpy builtin.
3634 Return NULL_RTX if we failed the caller should emit a normal call,
3635 otherwise try to get the result in TARGET, if convenient (and in
3636 mode MODE if that's convenient). */
3639 expand_builtin_stpcpy (tree exp, rtx target, enum machine_mode mode)
3642 location_t loc = EXPR_LOCATION (exp);
3644 if (!validate_arglist (exp, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
3647 dst = CALL_EXPR_ARG (exp, 0);
3648 src = CALL_EXPR_ARG (exp, 1);
3650 /* If return value is ignored, transform stpcpy into strcpy. */
3651 if (target == const0_rtx && implicit_built_in_decls[BUILT_IN_STRCPY])
3653 tree fn = implicit_built_in_decls[BUILT_IN_STRCPY];
3654 tree result = build_call_nofold (fn, 2, dst, src);
3655 return expand_expr (result, target, mode, EXPAND_NORMAL);
3662 /* Ensure we get an actual string whose length can be evaluated at
3663 compile-time, not an expression containing a string. This is
3664 because the latter will potentially produce pessimized code
3665 when used to produce the return value. */
3666 if (! c_getstr (src) || ! (len = c_strlen (src, 0)))
3667 return expand_movstr (dst, src, target, /*endp=*/2);
3669 lenp1 = size_binop_loc (loc, PLUS_EXPR, len, ssize_int (1));
3670 ret = expand_builtin_mempcpy_args (dst, src, lenp1,
3671 target, mode, /*endp=*/2);
3676 if (TREE_CODE (len) == INTEGER_CST)
3678 rtx len_rtx = expand_normal (len);
3680 if (CONST_INT_P (len_rtx))
3682 ret = expand_builtin_strcpy_args (dst, src, target);
3688 if (mode != VOIDmode)
3689 target = gen_reg_rtx (mode);
3691 target = gen_reg_rtx (GET_MODE (ret));
3693 if (GET_MODE (target) != GET_MODE (ret))
3694 ret = gen_lowpart (GET_MODE (target), ret);
3696 ret = plus_constant (ret, INTVAL (len_rtx));
3697 ret = emit_move_insn (target, force_operand (ret, NULL_RTX));
3705 return expand_movstr (dst, src, target, /*endp=*/2);
3709 /* Callback routine for store_by_pieces. Read GET_MODE_BITSIZE (MODE)
3710 bytes from constant string DATA + OFFSET and return it as target
3714 builtin_strncpy_read_str (void *data, HOST_WIDE_INT offset,
3715 enum machine_mode mode)
3717 const char *str = (const char *) data;
3719 if ((unsigned HOST_WIDE_INT) offset > strlen (str))
3722 return c_readstr (str + offset, mode);
3725 /* Expand expression EXP, which is a call to the strncpy builtin. Return
3726 NULL_RTX if we failed the caller should emit a normal call. */
3729 expand_builtin_strncpy (tree exp, rtx target)
3731 location_t loc = EXPR_LOCATION (exp);
3733 if (validate_arglist (exp,
3734 POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
3736 tree dest = CALL_EXPR_ARG (exp, 0);
3737 tree src = CALL_EXPR_ARG (exp, 1);
3738 tree len = CALL_EXPR_ARG (exp, 2);
3739 tree slen = c_strlen (src, 1);
3741 /* We must be passed a constant len and src parameter. */
3742 if (!host_integerp (len, 1) || !slen || !host_integerp (slen, 1))
3745 slen = size_binop_loc (loc, PLUS_EXPR, slen, ssize_int (1));
3747 /* We're required to pad with trailing zeros if the requested
3748 len is greater than strlen(s2)+1. In that case try to
3749 use store_by_pieces, if it fails, punt. */
3750 if (tree_int_cst_lt (slen, len))
3752 unsigned int dest_align
3753 = get_pointer_alignment (dest, BIGGEST_ALIGNMENT);
3754 const char *p = c_getstr (src);
3757 if (!p || dest_align == 0 || !host_integerp (len, 1)
3758 || !can_store_by_pieces (tree_low_cst (len, 1),
3759 builtin_strncpy_read_str,
3760 CONST_CAST (char *, p),
3764 dest_mem = get_memory_rtx (dest, len);
3765 store_by_pieces (dest_mem, tree_low_cst (len, 1),
3766 builtin_strncpy_read_str,
3767 CONST_CAST (char *, p), dest_align, false, 0);
3768 dest_mem = force_operand (XEXP (dest_mem, 0), target);
3769 dest_mem = convert_memory_address (ptr_mode, dest_mem);
3776 /* Callback routine for store_by_pieces. Read GET_MODE_BITSIZE (MODE)
3777 bytes from constant string DATA + OFFSET and return it as target
3781 builtin_memset_read_str (void *data, HOST_WIDE_INT offset ATTRIBUTE_UNUSED,
3782 enum machine_mode mode)
3784 const char *c = (const char *) data;
3785 char *p = XALLOCAVEC (char, GET_MODE_SIZE (mode));
3787 memset (p, *c, GET_MODE_SIZE (mode));
3789 return c_readstr (p, mode);
3792 /* Callback routine for store_by_pieces. Return the RTL of a register
3793 containing GET_MODE_SIZE (MODE) consecutive copies of the unsigned
3794 char value given in the RTL register data. For example, if mode is
3795 4 bytes wide, return the RTL for 0x01010101*data. */
3798 builtin_memset_gen_str (void *data, HOST_WIDE_INT offset ATTRIBUTE_UNUSED,
3799 enum machine_mode mode)
3805 size = GET_MODE_SIZE (mode);
3809 p = XALLOCAVEC (char, size);
3810 memset (p, 1, size);
3811 coeff = c_readstr (p, mode);
3813 target = convert_to_mode (mode, (rtx) data, 1);
3814 target = expand_mult (mode, target, coeff, NULL_RTX, 1);
3815 return force_reg (mode, target);
3818 /* Expand expression EXP, which is a call to the memset builtin. Return
3819 NULL_RTX if we failed the caller should emit a normal call, otherwise
3820 try to get the result in TARGET, if convenient (and in mode MODE if that's
3824 expand_builtin_memset (tree exp, rtx target, enum machine_mode mode)
3826 if (!validate_arglist (exp,
3827 POINTER_TYPE, INTEGER_TYPE, INTEGER_TYPE, VOID_TYPE))
3831 tree dest = CALL_EXPR_ARG (exp, 0);
3832 tree val = CALL_EXPR_ARG (exp, 1);
3833 tree len = CALL_EXPR_ARG (exp, 2);
3834 return expand_builtin_memset_args (dest, val, len, target, mode, exp);
3838 /* Helper function to do the actual work for expand_builtin_memset. The
3839 arguments to the builtin_memset call DEST, VAL, and LEN are broken out
3840 so that this can also be called without constructing an actual CALL_EXPR.
3841 The other arguments and return value are the same as for
3842 expand_builtin_memset. */
3845 expand_builtin_memset_args (tree dest, tree val, tree len,
3846 rtx target, enum machine_mode mode, tree orig_exp)
3849 enum built_in_function fcode;
3851 unsigned int dest_align;
3852 rtx dest_mem, dest_addr, len_rtx;
3853 HOST_WIDE_INT expected_size = -1;
3854 unsigned int expected_align = 0;
3856 dest_align = get_pointer_alignment (dest, BIGGEST_ALIGNMENT);
3858 /* If DEST is not a pointer type, don't do this operation in-line. */
3859 if (dest_align == 0)
3862 if (currently_expanding_gimple_stmt)
3863 stringop_block_profile (currently_expanding_gimple_stmt,
3864 &expected_align, &expected_size);
3866 if (expected_align < dest_align)
3867 expected_align = dest_align;
3869 /* If the LEN parameter is zero, return DEST. */
3870 if (integer_zerop (len))
3872 /* Evaluate and ignore VAL in case it has side-effects. */
3873 expand_expr (val, const0_rtx, VOIDmode, EXPAND_NORMAL);
3874 return expand_expr (dest, target, mode, EXPAND_NORMAL);
3877 /* Stabilize the arguments in case we fail. */
3878 dest = builtin_save_expr (dest);
3879 val = builtin_save_expr (val);
3880 len = builtin_save_expr (len);
3882 len_rtx = expand_normal (len);
3883 dest_mem = get_memory_rtx (dest, len);
3885 if (TREE_CODE (val) != INTEGER_CST)
3889 val_rtx = expand_normal (val);
3890 val_rtx = convert_to_mode (TYPE_MODE (unsigned_char_type_node),
3893 /* Assume that we can memset by pieces if we can store
3894 * the coefficients by pieces (in the required modes).
3895 * We can't pass builtin_memset_gen_str as that emits RTL. */
3897 if (host_integerp (len, 1)
3898 && can_store_by_pieces (tree_low_cst (len, 1),
3899 builtin_memset_read_str, &c, dest_align,
3902 val_rtx = force_reg (TYPE_MODE (unsigned_char_type_node),
3904 store_by_pieces (dest_mem, tree_low_cst (len, 1),
3905 builtin_memset_gen_str, val_rtx, dest_align,
3908 else if (!set_storage_via_setmem (dest_mem, len_rtx, val_rtx,
3909 dest_align, expected_align,
3913 dest_mem = force_operand (XEXP (dest_mem, 0), NULL_RTX);
3914 dest_mem = convert_memory_address (ptr_mode, dest_mem);
3918 if (target_char_cast (val, &c))
3923 if (host_integerp (len, 1)
3924 && can_store_by_pieces (tree_low_cst (len, 1),
3925 builtin_memset_read_str, &c, dest_align,
3927 store_by_pieces (dest_mem, tree_low_cst (len, 1),
3928 builtin_memset_read_str, &c, dest_align, true, 0);
3929 else if (!set_storage_via_setmem (dest_mem, len_rtx, GEN_INT (c),
3930 dest_align, expected_align,
3934 dest_mem = force_operand (XEXP (dest_mem, 0), NULL_RTX);
3935 dest_mem = convert_memory_address (ptr_mode, dest_mem);
3939 set_mem_align (dest_mem, dest_align);
3940 dest_addr = clear_storage_hints (dest_mem, len_rtx,
3941 CALL_EXPR_TAILCALL (orig_exp)
3942 ? BLOCK_OP_TAILCALL : BLOCK_OP_NORMAL,
3943 expected_align, expected_size);
3947 dest_addr = force_operand (XEXP (dest_mem, 0), NULL_RTX);
3948 dest_addr = convert_memory_address (ptr_mode, dest_addr);
3954 fndecl = get_callee_fndecl (orig_exp);
3955 fcode = DECL_FUNCTION_CODE (fndecl);
3956 if (fcode == BUILT_IN_MEMSET)
3957 fn = build_call_nofold (fndecl, 3, dest, val, len);
3958 else if (fcode == BUILT_IN_BZERO)
3959 fn = build_call_nofold (fndecl, 2, dest, len);
3962 gcc_assert (TREE_CODE (fn) == CALL_EXPR);
3963 CALL_EXPR_TAILCALL (fn) = CALL_EXPR_TAILCALL (orig_exp);
3964 return expand_call (fn, target, target == const0_rtx);
3967 /* Expand expression EXP, which is a call to the bzero builtin. Return
3968 NULL_RTX if we failed the caller should emit a normal call. */
3971 expand_builtin_bzero (tree exp)
3974 location_t loc = EXPR_LOCATION (exp);
3976 if (!validate_arglist (exp, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
3979 dest = CALL_EXPR_ARG (exp, 0);
3980 size = CALL_EXPR_ARG (exp, 1);
3982 /* New argument list transforming bzero(ptr x, int y) to
3983 memset(ptr x, int 0, size_t y). This is done this way
3984 so that if it isn't expanded inline, we fallback to
3985 calling bzero instead of memset. */
3987 return expand_builtin_memset_args (dest, integer_zero_node,
3988 fold_convert_loc (loc, sizetype, size),
3989 const0_rtx, VOIDmode, exp);
3992 /* Expand expression EXP, which is a call to the memcmp built-in function.
3993 Return NULL_RTX if we failed and the
3994 caller should emit a normal call, otherwise try to get the result in
3995 TARGET, if convenient (and in mode MODE, if that's convenient). */
3998 expand_builtin_memcmp (tree exp, ATTRIBUTE_UNUSED rtx target,
3999 ATTRIBUTE_UNUSED enum machine_mode mode)
4001 location_t loc ATTRIBUTE_UNUSED = EXPR_LOCATION (exp);
4003 if (!validate_arglist (exp,
4004 POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
4007 #if defined HAVE_cmpmemsi || defined HAVE_cmpstrnsi
4009 rtx arg1_rtx, arg2_rtx, arg3_rtx;
4012 tree arg1 = CALL_EXPR_ARG (exp, 0);
4013 tree arg2 = CALL_EXPR_ARG (exp, 1);
4014 tree len = CALL_EXPR_ARG (exp, 2);
4017 = get_pointer_alignment (arg1, BIGGEST_ALIGNMENT) / BITS_PER_UNIT;
4019 = get_pointer_alignment (arg2, BIGGEST_ALIGNMENT) / BITS_PER_UNIT;
4020 enum machine_mode insn_mode;
4022 #ifdef HAVE_cmpmemsi
4024 insn_mode = insn_data[(int) CODE_FOR_cmpmemsi].operand[0].mode;
4027 #ifdef HAVE_cmpstrnsi
4029 insn_mode = insn_data[(int) CODE_FOR_cmpstrnsi].operand[0].mode;
4034 /* If we don't have POINTER_TYPE, call the function. */
4035 if (arg1_align == 0 || arg2_align == 0)
4038 /* Make a place to write the result of the instruction. */
4041 && REG_P (result) && GET_MODE (result) == insn_mode
4042 && REGNO (result) >= FIRST_PSEUDO_REGISTER))
4043 result = gen_reg_rtx (insn_mode);
4045 arg1_rtx = get_memory_rtx (arg1, len);
4046 arg2_rtx = get_memory_rtx (arg2, len);
4047 arg3_rtx = expand_normal (fold_convert_loc (loc, sizetype, len));
4049 /* Set MEM_SIZE as appropriate. */
4050 if (CONST_INT_P (arg3_rtx))
4052 set_mem_size (arg1_rtx, arg3_rtx);
4053 set_mem_size (arg2_rtx, arg3_rtx);
4056 #ifdef HAVE_cmpmemsi
4058 insn = gen_cmpmemsi (result, arg1_rtx, arg2_rtx, arg3_rtx,
4059 GEN_INT (MIN (arg1_align, arg2_align)));
4062 #ifdef HAVE_cmpstrnsi
4064 insn = gen_cmpstrnsi (result, arg1_rtx, arg2_rtx, arg3_rtx,
4065 GEN_INT (MIN (arg1_align, arg2_align)));
4073 emit_library_call_value (memcmp_libfunc, result, LCT_PURE,
4074 TYPE_MODE (integer_type_node), 3,
4075 XEXP (arg1_rtx, 0), Pmode,
4076 XEXP (arg2_rtx, 0), Pmode,
4077 convert_to_mode (TYPE_MODE (sizetype), arg3_rtx,
4078 TYPE_UNSIGNED (sizetype)),
4079 TYPE_MODE (sizetype));
4081 /* Return the value in the proper mode for this function. */
4082 mode = TYPE_MODE (TREE_TYPE (exp));
4083 if (GET_MODE (result) == mode)
4085 else if (target != 0)
4087 convert_move (target, result, 0);
4091 return convert_to_mode (mode, result, 0);
4098 /* Expand expression EXP, which is a call to the strcmp builtin. Return NULL_RTX
4099 if we failed the caller should emit a normal call, otherwise try to get
4100 the result in TARGET, if convenient. */
4103 expand_builtin_strcmp (tree exp, ATTRIBUTE_UNUSED rtx target)
4105 if (!validate_arglist (exp, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
4108 #if defined HAVE_cmpstrsi || defined HAVE_cmpstrnsi
4109 if (cmpstr_optab[SImode] != CODE_FOR_nothing
4110 || cmpstrn_optab[SImode] != CODE_FOR_nothing)
4112 rtx arg1_rtx, arg2_rtx;
4113 rtx result, insn = NULL_RTX;
4115 tree arg1 = CALL_EXPR_ARG (exp, 0);
4116 tree arg2 = CALL_EXPR_ARG (exp, 1);
4119 = get_pointer_alignment (arg1, BIGGEST_ALIGNMENT) / BITS_PER_UNIT;
4121 = get_pointer_alignment (arg2, BIGGEST_ALIGNMENT) / BITS_PER_UNIT;
4123 /* If we don't have POINTER_TYPE, call the function. */
4124 if (arg1_align == 0 || arg2_align == 0)
4127 /* Stabilize the arguments in case gen_cmpstr(n)si fail. */
4128 arg1 = builtin_save_expr (arg1);
4129 arg2 = builtin_save_expr (arg2);
4131 arg1_rtx = get_memory_rtx (arg1, NULL);
4132 arg2_rtx = get_memory_rtx (arg2, NULL);
4134 #ifdef HAVE_cmpstrsi
4135 /* Try to call cmpstrsi. */
4138 enum machine_mode insn_mode
4139 = insn_data[(int) CODE_FOR_cmpstrsi].operand[0].mode;
4141 /* Make a place to write the result of the instruction. */
4144 && REG_P (result) && GET_MODE (result) == insn_mode
4145 && REGNO (result) >= FIRST_PSEUDO_REGISTER))
4146 result = gen_reg_rtx (insn_mode);
4148 insn = gen_cmpstrsi (result, arg1_rtx, arg2_rtx,
4149 GEN_INT (MIN (arg1_align, arg2_align)));
4152 #ifdef HAVE_cmpstrnsi
4153 /* Try to determine at least one length and call cmpstrnsi. */
4154 if (!insn && HAVE_cmpstrnsi)
4159 enum machine_mode insn_mode
4160 = insn_data[(int) CODE_FOR_cmpstrnsi].operand[0].mode;
4161 tree len1 = c_strlen (arg1, 1);
4162 tree len2 = c_strlen (arg2, 1);
4165 len1 = size_binop (PLUS_EXPR, ssize_int (1), len1);
4167 len2 = size_binop (PLUS_EXPR, ssize_int (1), len2);
4169 /* If we don't have a constant length for the first, use the length
4170 of the second, if we know it. We don't require a constant for
4171 this case; some cost analysis could be done if both are available
4172 but neither is constant. For now, assume they're equally cheap,
4173 unless one has side effects. If both strings have constant lengths,