1 files changed, 72 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr33723.c b/gcc/testsuite/gcc.dg/tree-ssa/pr33723.c
new file mode 100644
index 000000000..32a3aad9c
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/pr33723.c
@@ -0,0 +1,72 @@
+/* PR tree-optimization/33723 */
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-gimple" } */
+
+typedef union
+{
+  struct
+  {
+    int f1, f2, f3, f4, f5, f6, f7, f8;
+    long int f9, f10;
+    int f11;
+  } f;
+  char s[4];
+  long int a;
+} T;
+
+void
+foo1 (void)
+{
+  T t;
+  t = (T) { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } };
+  test (&t);
+}
+
+void
+bar1 (void)
+{
+  T t = { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } };
+  test (&t);
+}
+
+void
+baz1 (void)
+{
+  T t;
+  t = (const T) { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } };
+  test (&t);
+}
+
+void
+foo2 (void)
+{
+  T t;
+  t = (T) { { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 } };
+  test (&t);
+}
+
+void
+bar2 (void)
+{
+  T t = { { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 } };
+  test (&t);
+}
+
+void
+baz2 (void)
+{
+  T t;
+  t = (const T) { { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 } };
+  test (&t);
+}
+
+void
+baz3 (void)
+{
+  T t;
+  t = (const T) (T) { { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 } };
+  test (&t);
+}
+
+/* { dg-final { scan-tree-dump-not "t = D" "gimple"} } */
+/* { dg-final { cleanup-tree-dump "gimple" } } */