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re PR tree-optimization/83843 (wrong code at -O2)

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PR tree-optimization/83843
	* gcc.dg/store_merging_18.c: Don't expect "Merging successful" on arm.
	* gcc.dg/store_merging_19.c: New test.

From-SVN: r256783
This commit is contained in:
Jakub Jelinek 2018-01-17 12:19:16 +01:00 • committed by Jakub Jelinek
parent 5a08c6f464
commit b67d554cc2
3 changed files with 64 additions and 1 deletions
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6
gcc/testsuite/ChangeLog
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@ -1,3 +1,9 @@
2018-01-17 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/83843
* gcc.dg/store_merging_18.c: Don't expect "Merging successful" on arm.
* gcc.dg/store_merging_19.c: New test.
2018-01-17 Kyrylo Tkachov <kyrylo.tkachov@arm.com>
* gcc.target/arm/xor-and.c: Fix armv6 effective target checks

2
gcc/testsuite/gcc.dg/store_merging_18.c
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@ -1,7 +1,7 @@
/* PR tree-optimization/83843 */
/* { dg-do run } */
/* { dg-options "-O2 -fdump-tree-store-merging" } */
/* { dg-final { scan-tree-dump-times "Merging successful" 3 "store-merging" { target store_merge } } } */
/* { dg-final { scan-tree-dump-times "Merging successful" 3 "store-merging" { target { store_merge && { ! arm*-*-* } } } } } */
__attribute__((noipa)) void
foo (unsigned char *buf, unsigned char *tab)

57
gcc/testsuite/gcc.dg/store_merging_19.c Normal file
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@ -0,0 +1,57 @@
/* PR tree-optimization/83843 */
/* { dg-do run } */
/* { dg-options "-O2 -fdump-tree-store-merging" } */
/* { dg-final { scan-tree-dump-times "Merging successful" 3 "store-merging" { target store_merge } } } */
__attribute__((noipa)) void
foo (unsigned char *buf, unsigned char *tab)
{
tab = __builtin_assume_aligned (tab, 2);
buf = __builtin_assume_aligned (buf, 2);
unsigned v = tab[1] ^ (tab[0] << 8);
buf[0] = ~(v >> 8);
buf[1] = ~v;
}
__attribute__((noipa)) void
bar (unsigned char *buf, unsigned char *tab)
{
tab = __builtin_assume_aligned (tab, 2);
buf = __builtin_assume_aligned (buf, 2);
unsigned v = tab[1] ^ (tab[0] << 8);
buf[0] = (v >> 8);
buf[1] = ~v;
}
__attribute__((noipa)) void
baz (unsigned char *buf, unsigned char *tab)
{
tab = __builtin_assume_aligned (tab, 2);
buf = __builtin_assume_aligned (buf, 2);
unsigned v = tab[1] ^ (tab[0] << 8);
buf[0] = ~(v >> 8);
buf[1] = v;
}
int
main ()
{
volatile unsigned char l1 = 0;
volatile unsigned char l2 = 1;
unsigned char buf[2] __attribute__((aligned (2)));
unsigned char tab[2] __attribute__((aligned (2))) = { l1 + 1, l2 * 2 };
foo (buf, tab);
if (buf[0] != (unsigned char) ~1 || buf[1] != (unsigned char) ~2)
__builtin_abort ();
buf[0] = l1 + 7;
buf[1] = l2 * 8;
bar (buf, tab);
if (buf[0] != 1 || buf[1] != (unsigned char) ~2)
__builtin_abort ();
buf[0] = l1 + 9;
buf[1] = l2 * 10;
baz (buf, tab);
if (buf[0] != (unsigned char) ~1 || buf[1] != 2)
__builtin_abort ();
return 0;
}