1 files changed, 21 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/ssa-dse-14.c b/gcc/testsuite/gcc.dg/tree-ssa/ssa-dse-14.c
new file mode 100644
index 00000000000..1c74596adba
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/ssa-dse-14.c
@@ -0,0 +1,21 @@
+/* { dg-do compile } */
+/* { dg-options "-O -fdump-tree-dse1-details" } */
+
+struct A { char c[4]; } a, b;
+
+void
+f1 (void)
+{
+  a.c[2] = '\0';
+  __builtin_memset (&a.c[1], 1, 2);
+}
+
+void
+f2 (void)
+{
+  __builtin_memcpy (&a.c[0], "a", 1);
+  __builtin_memcpy (&a, &b, 3);
+}
+
+/* { dg-final { scan-tree-dump-times "Deleted dead store" 2 "dse1" } } */
+/* { dg-final { cleanup-tree-dump "dse1" } } */