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re PR middle-end/46647 (Can't inline memset with -1)

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PR middle-end/46647
	* builtins.c (fold_builtin_memset): Check c is INTEGER_CST instead
	of host_integerp check.  Use TREE_INT_CST_LOW instead of tree_low_cst.

	* gcc.dg/pr46647.c: New test.

From-SVN: r167170
This commit is contained in:
Jakub Jelinek 2010-11-26 10:38:54 +01:00 committed by Jakub Jelinek
parent fabd13b4a9
commit f1b6918835
4 changed files with 40 additions and 2 deletions
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4
gcc/ChangeLog
View File

@ -1,5 +1,9 @@
2010-11-26 Jakub Jelinek <jakub@redhat.com>
PR middle-end/46647
* builtins.c (fold_builtin_memset): Check c is INTEGER_CST instead
of host_integerp check. Use TREE_INT_CST_LOW instead of tree_low_cst.
PR bootstrap/45700
* tree.h (build1_stat_loc, build2_stat_loc, build3_stat_loc,
build4_stat_loc, build5_stat_loc, build6_stat_loc): New inlines.

4
gcc/builtins.c
View File

@ -8345,7 +8345,7 @@ fold_builtin_memset (location_t loc, tree dest, tree c, tree len,
if (integer_zerop (len))
return omit_one_operand_loc (loc, type, dest, c);
if (! host_integerp (c, 1) || TREE_SIDE_EFFECTS (dest))
if (TREE_CODE (c) != INTEGER_CST || TREE_SIDE_EFFECTS (dest))
return NULL_TREE;
var = dest;
@ -8384,7 +8384,7 @@ fold_builtin_memset (location_t loc, tree dest, tree c, tree len,
if (CHAR_BIT != 8 || BITS_PER_UNIT != 8 || HOST_BITS_PER_WIDE_INT > 64)
return NULL_TREE;
cval = tree_low_cst (c, 1);
cval = TREE_INT_CST_LOW (c);
cval &= 0xff;
cval |= cval << 8;
cval |= cval << 16;

5
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,8 @@
2010-11-26 Jakub Jelinek <jakub@redhat.com>
PR middle-end/46647
* gcc.dg/pr46647.c: New test.
2010-11-25 Janus Weil <janus@gcc.gnu.org>
PR fortran/46581

29
gcc/testsuite/gcc.dg/pr46647.c Normal file
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@ -0,0 +1,29 @@
/* PR middle-end/46647 */
/* { dg-do compile } */
/* { dg-options "-O2 -fdump-tree-optimized" } */
int a;
int
func1 (void)
{
__builtin_memset (&a, -1, sizeof (a));
return 0;
}
int
func2 (void)
{
__builtin_memset (&a, 123, sizeof (a));
return 0;
}
int
func3 (void)
{
__builtin_memset (&a, 0, sizeof (a));
return 0;
}
/* { dg-final { scan-tree-dump-not "memset" "optimized" } } */
/* { dg-final { cleanup-tree-dump "optimized" } } */