1 files changed, 29 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/pr46647.c b/gcc/testsuite/gcc.dg/pr46647.c
new file mode 100644
index 000000000..ab85e17a0
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr46647.c
@@ -0,0 +1,29 @@
+/* PR middle-end/46647 */
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-optimized" } */
+
+int a;
+
+int
+func1 (void)
+{
+  __builtin_memset (&a, -1, sizeof (a));
+  return 0;
+}
+
+int
+func2 (void)
+{
+  __builtin_memset (&a, 123, sizeof (a));
+  return 0;
+}
+
+int
+func3 (void)
+{
+  __builtin_memset (&a, 0, sizeof (a));
+  return 0;
+}
+
+/* { dg-final { scan-tree-dump-not "memset" "optimized" } } */
+/* { dg-final { cleanup-tree-dump "optimized" } } */