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simplify-rtx.c (simplify_immed_subreg): Only clear up to elem_bitsize bits, not max_bitsize.

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* simplify-rtx.c (simplify_immed_subreg) <case CONST_DOUBLE>: Only clear
	up to elem_bitsize bits, not max_bitsize.

	* gcc.target/i386/sse-4.c: New test.

From-SVN: r103318
This commit is contained in:
Jakub Jelinek 2005-08-21 15:27:56 +02:00 committed by Jakub Jelinek
parent 3c0c8f9dff
commit 1125164cd3
4 changed files with 20 additions and 1 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2005-08-21 Jakub Jelinek <jakub@redhat.com>
* simplify-rtx.c (simplify_immed_subreg) <case CONST_DOUBLE>: Only clear
up to elem_bitsize bits, not max_bitsize.
2005-08-21 Sebastian Pop <pop@cri.ensmp.fr>
PR tree-optimization/23433

2
gcc/simplify-rtx.c
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@ -3605,7 +3605,7 @@ simplify_immed_subreg (enum machine_mode outermode, rtx op,
}
/* It shouldn't matter what's done here, so fill it with
zero. */
for (; i < max_bitsize; i += value_bit)
for (; i < elem_bitsize; i += value_bit)
*vp++ = 0;
}
else

4
gcc/testsuite/ChangeLog
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@ -1,3 +1,7 @@
2005-08-21 Jakub Jelinek <jakub@redhat.com>
* gcc.target/i386/sse-4.c: New test.
2005-08-20 John David Anglin <dave.anglin@nrc-cnrc.gc.ca>
PR testsuite/23239

10
gcc/testsuite/gcc.target/i386/sse-4.c Normal file
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@ -0,0 +1,10 @@
/* This testcase caused a buffer overflow in simplify_immed_subreg. */
/* { dg-do compile } */
/* { dg-options "-O2 -msse2" } */
#include <emmintrin.h>
__m128i foo (__m128i x)
{
return _mm_min_epu8 (x, _mm_set1_epi8 (10));
}