New testcase for PR501

llvm-svn: 20117

1 files changed, 32 insertions, 0 deletions

diff --git a/llvm/test/Regression/C++Frontend/2005-02-11-AnonymousUnion.cpp b/llvm/test/Regression/C++Frontend/2005-02-11-AnonymousUnion.cpp
new file mode 100644
index 00000000000..b0ff7e75075
--- /dev/null
+++ b/llvm/test/Regression/C++Frontend/2005-02-11-AnonymousUnion.cpp
@@ -0,0 +1,32 @@
+// RUN: %llvmgxx %s -S -o -
+
+// Test anonymous union with members of the same size.
+int test1(float F) {
+  union {
+     float G;
+     int i;
+  };
+  G = F;
+  return i;
+}
+
+// test anonymous union with members of differing size.
+int test2(short F) {
+  volatile union {
+     short G;
+     int i;
+  };
+  G = F;
+  return i;
+}
+
+// Make sure that normal unions work.  duh :)
+volatile union {
+  short S;
+  int i;
+} U;
+
+int test3(short s) {
+  U.S = s;
+  return U.i;
+}