[gcc(refs/vendors/ARM/heads/arm-struct-reorg-wip)] testsuite: Add testcase for already fixed PR [PR94573]

[Tamar Christina]

https://gcc.gnu.org/g:66b8801141f5c1a65613b8f42501e8cd4b9195d9

commit 66b8801141f5c1a65613b8f42501e8cd4b9195d9
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Tue Apr 14 16:14:47 2020 +0200

    testsuite: Add testcase for already fixed PR [PR94573]
    
    2020-04-14  Jakub Jelinek  <jakub@redhat.com>
    
            PR tree-optimization/94573
            * gcc.dg/store_merging_30.c: New test.

Diff:
---
 gcc/testsuite/ChangeLog                 |  7 ++++++-
 gcc/testsuite/gcc.dg/store_merging_30.c | 20 ++++++++++++++++++++
 2 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 051dcb15f48..64ee01b943c 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,4 +1,9 @@
-2020-04-14  Yang Yang <yangyang305@huawei.com>
+2020-04-14  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/94573
+	* gcc.dg/store_merging_30.c: New test.
+
+2020-04-14  Yang Yang  <yangyang305@huawei.com>
 
 	PR tree-optimization/94574
 	* gcc.dg/pr94574.c: New test.
diff --git a/gcc/testsuite/gcc.dg/store_merging_30.c b/gcc/testsuite/gcc.dg/store_merging_30.c
new file mode 100644
index 00000000000..694d560a621
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/store_merging_30.c
@@ -0,0 +1,20 @@
+/* PR tree-optimization/94573 */
+/* { dg-do compile } */
+/* { dg-require-effective-target store_merge } */
+/* { dg-options "-O2 -fdump-tree-store-merging-details" } */
+/* { dg-final { scan-tree-dump "New sequence of 4 stores to replace old one of 8 stores" "store-merging" { target lp64 } } } */
+
+int var[43][12];
+
+void
+foo (int x)
+{
+  var[x][0] = 0;
+  var[x][1] = 0;
+  var[x][2] = 0;
+  var[x][3] = 0;
+  var[x][4] = 0;
+  var[x][5] = 0;
+  var[x][6] = 0;
+  var[x][7] = 0;
+}