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re PR middle-end/55430 (LRA miscompilation of ree.c) 

PR middle-end/55430
	* gcc.dg/pr55430.c: New test.

From-SVN: r193757
This commit is contained in:
Jakub Jelinek 2012-11-23 16:12:58 +01:00 committed by Jakub Jelinek
parent e297eb600d
commit 1a65a0083e
2 changed files with 48 additions and 0 deletions
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5
gcc/testsuite/ChangeLog
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2012-11-23 Jakub Jelinek <jakub@redhat.com>
PR middle-end/55430
* gcc.dg/pr55430.c: New test.
2012-11-23 Kostya Serebryany <kcc@google.com>
* c-c++-common/asan/memcmp-1.c: Update to match the new libsanitizer.

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gcc/testsuite/gcc.dg/pr55430.c Normal file
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/* PR middle-end/55430 */
/* { dg-do run { target mmap } } */
/* { dg-options "-O2" } */
#include <stddef.h>
#include <stdio.h>
#include <sys/mman.h>
#ifndef MAP_ANONYMOUS
#define MAP_ANONYMOUS MAP_ANON
#endif
#ifndef MAP_ANON
#define MAP_ANON 0
#endif
#include <stdlib.h>
struct S
{
unsigned int s1 : 8;
unsigned int s2 : 2;
};
__attribute__((noinline, noclone)) int
foo (int x, int y, struct S *z, unsigned int w)
{
if (z[y].s2 == x && z[y].s1 == w)
return 1;
return 0;
}
int
main ()
{
char *p = mmap (NULL, 131072, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
if (p == MAP_FAILED)
return 0;
if (munmap (p + 65536, 65536) < 0)
return 0;
if ((65536 / sizeof (struct S)) * sizeof (struct S) != 65536)
return 0;
struct S *s = (struct S *) (p + 65536);
return foo (0, 0, s - 1, 0) != 1;
}