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re PR tree-optimization/37573 (gcc-4.4 regression: incorrect code generation with -O1 -ftree-vectorize)

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2008-11-03  Richard Guenther  <rguenther@suse.de>

	PR middle-end/37573
	* tree-data-ref.c (split_constant_offset_1): Fix tuplification.

	* gcc.c-torture/execute/pr37573.c: New testcase.

Co-Authored-By: Jakub Jelinek <jakub@redhat.com>

From-SVN: r141547
This commit is contained in:
Richard Guenther 2008-11-03 12:32:52 +00:00 committed by Richard Biener
parent 2a81fe20dd
commit da4b6efcd6
4 changed files with 77 additions and 0 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2008-11-03 Richard Guenther <rguenther@suse.de>
PR middle-end/37573
* tree-data-ref.c (split_constant_offset_1): Fix tuplification.
2008-11-03 Jakub Jelinek <jakub@redhat.com>
PR middle-end/37858

6
gcc/testsuite/ChangeLog
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@ -1,3 +1,9 @@
2008-11-03 Richard Guenther <rguenther@suse.de>
Jakub Jelinek <jakub@redhat.com>
PR middle-end/37573
* gcc.c-torture/execute/pr37573.c: New testcase.
2008-11-03 Jakub Jelinek <jakub@redhat.com>
PR middle-end/37858

65
gcc/testsuite/gcc.c-torture/execute/pr37573.c Normal file
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@ -0,0 +1,65 @@
/* PR tree-optimization/37573 */
struct S
{
unsigned int *a;
unsigned int b;
unsigned int c[624];
};
static unsigned char __attribute__((noinline))
foo (struct S *s)
{
unsigned int r;
if (!--s->b)
{
unsigned int *c = s->c;
unsigned int i;
s->a = c;
for (i = 0; i < 227; i++)
c[i] = ((((c[i] ^ c[i + 1]) & 0x7ffffffe) ^ c[i]) >> 1)
^ ((0 - (c[i + 1] & 1)) & 0x9908b0df) ^ c[i + 397];
}
r = *(s->a++);
r ^= (r >> 11);
r ^= ((r & 0xff3a58ad) << 7);
r ^= ((r & 0xffffdf8c) << 15);
r ^= (r >> 18);
return (unsigned char) (r >> 1);
}
static void __attribute__((noinline))
bar (unsigned char *p, unsigned int q, unsigned int r)
{
struct S s;
unsigned int i;
unsigned int *c = s.c;
*c = r;
for (i = 1; i < 624; i++)
c[i] = i + 0x6c078965 * ((c[i - 1] >> 30) ^ c[i - 1]);
s.b = 1;
while (q--)
*p++ ^= foo (&s);
};
static unsigned char p[23] = {
0xc0, 0x49, 0x17, 0x32, 0x62, 0x1e, 0x2e, 0xd5, 0x4c, 0x19, 0x28, 0x49,
0x91, 0xe4, 0x72, 0x83, 0x91, 0x3d, 0x93, 0x83, 0xb3, 0x61, 0x38
};
static unsigned char q[23] = {
0x3e, 0x41, 0x55, 0x54, 0x4f, 0x49, 0x54, 0x20, 0x55, 0x4e, 0x49, 0x43,
0x4f, 0x44, 0x45, 0x20, 0x53, 0x43, 0x52, 0x49, 0x50, 0x54, 0x3c
};
int
main (void)
{
unsigned int s;
s = 23;
bar (p, s, s + 0xa25e);
if (__builtin_memcmp (p, q, s) != 0)
__builtin_abort ();
return 0;
}

1
gcc/tree-data-ref.c
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@ -551,6 +551,7 @@ split_constant_offset_1 (tree type, tree op0, enum tree_code code, tree op1,
enum machine_mode pmode;
int punsignedp, pvolatilep;
op0 = TREE_OPERAND (op0, 0);
if (!handled_component_p (op0))
return false;