1 files changed, 16 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/fold-mulconj-1.c b/gcc/testsuite/gcc.dg/fold-mulconj-1.c
new file mode 100644
index 000000000..0e04653e3
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/fold-mulconj-1.c
@@ -0,0 +1,16 @@
+/* PR tree-optimization/23452 */
+/* { dg-do compile } */
+/* { dg-options "-O2 -ffast-math -fdump-tree-gimple" } */
+
+_Complex double foo(_Complex double z)
+{
+  return z * ~z;
+}
+
+_Complex int bar(_Complex int z)
+{
+  return z * ~z;
+}
+
+/* { dg-final { scan-tree-dump-times "CONJ_EXPR" 0 "gimple" } } */
+/* { dg-final { cleanup-tree-dump "gimple" } } */