Hi!
Some arm options are unfortunately the only exception when store_merge
predicate is true even on a target with STRICT_ALIGNMENT, in which case we
can't really do what the testcase wants to test, an unaligned store covering
the 3 separate stores. There are other testcases that already have to apply
arm workarounds.
Fixed thusly, committed as obvious to trunk.
2019-05-10 Jakub Jelinek <ja...@redhat.com>
PR tree-optimization/88709
PR tree-optimization/90271
* gcc.dg/store_merging_29.c: Allow 4 stores to replace 6 stores on
arm*-*-*.
--- gcc/testsuite/gcc.dg/store_merging_29.c.jj 2019-05-06 23:49:33.378041182
+0200
+++ gcc/testsuite/gcc.dg/store_merging_29.c 2019-05-09 16:27:49.053535179
+0200
@@ -2,8 +2,8 @@
/* { dg-do run { target int32 } } */
/* { dg-require-effective-target store_merge } */
/* { dg-options "-O2 -fdump-tree-store-merging-details" } */
-/* { dg-final { scan-tree-dump "New sequence of 3 stores to replace old one of
6 stores" "store-merging" { target le } } } */
-/* { dg-final { scan-tree-dump "New sequence of \[34] stores to replace old
one of 6 stores" "store-merging" { target be } } } */
+/* { dg-final { scan-tree-dump "New sequence of 3 stores to replace old one of
6 stores" "store-merging" { target { le && { ! arm*-*-* } } } } } */
+/* { dg-final { scan-tree-dump "New sequence of \[34] stores to replace old
one of 6 stores" "store-merging" { target { be || { arm*-*-* } } } } } */
struct T { char a[1024]; };
Jakub
