gcc-7.1.0gcc-7.1.0

1 files changed, 26 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/store_merging_7.c b/gcc/testsuite/gcc.dg/store_merging_7.c
new file mode 100644
index 0000000000..c744ece640
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/store_merging_7.c
@@ -0,0 +1,26 @@
+/* { dg-do compile } */
+/* { dg-require-effective-target store_merge } */
+/* { dg-options "-O2 -fdump-tree-store-merging" } */
+
+/* Check that we can merge consecutive array members through the pointer.
+   PR rtl-optimization/23684.  */
+
+void
+foo (char *input)
+{
+  input = __builtin_assume_aligned (input, 8);
+  input[0] = 'H';
+  input[1] = 'e';
+  input[2] = 'l';
+  input[3] = 'l';
+  input[4] = 'o';
+  input[5] = ' ';
+  input[6] = 'w';
+  input[7] = 'o';
+  input[8] = 'r';
+  input[9] = 'l';
+  input[10] = 'd';
+  input[11] = '\0';
+}
+
+/* { dg-final { scan-tree-dump-times "Merging successful" 1 "store-merging" } } */