1 files changed, 15 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/warn/Wstrict-aliasing-bogus-union.C b/gcc/testsuite/g++.dg/warn/Wstrict-aliasing-bogus-union.C
new file mode 100644
index 000000000..dfbb42c6f
--- /dev/null
+++ b/gcc/testsuite/g++.dg/warn/Wstrict-aliasing-bogus-union.C
@@ -0,0 +1,15 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -Wstrict-aliasing -fstrict-aliasing" } */
+
+
+union U {
+  int i;
+  float f;
+};
+
+float foo () {
+  union U u;
+  float* f = &u.f;  /* { dg-bogus "unions are holy in GCC" } */
+  u.i = 2;
+  return *f;
+}