Do not ignore packed member size while selecting union type.

llvm-svn: 42458

1 files changed, 37 insertions, 0 deletions

diff --git a/llvm/test/CFrontend/2007-09-28-PackedUnionMember.c b/llvm/test/CFrontend/2007-09-28-PackedUnionMember.c
new file mode 100644
index 00000000000..1e646574830
--- /dev/null
+++ b/llvm/test/CFrontend/2007-09-28-PackedUnionMember.c
@@ -0,0 +1,37 @@
+// RUN: %llvmgcc %s -S -o -
+#pragma pack(push, 2)
+struct H {
+  unsigned long f1;
+  unsigned long f2;
+  union {
+    struct opaque1 *f3;
+    struct opaque2 *f4;
+    struct {
+      struct opaque3 *f5;
+      unsigned short  f6;
+    } f7;
+  } f8;
+};
+#pragma pack(pop)
+
+struct E {
+  unsigned long f1;
+  unsigned long f2;
+};
+
+typedef long (*FuncPtr) ();
+
+extern long bork(FuncPtr handler, const struct E *list);
+
+static long hndlr()
+{
+  struct H cmd = { 4, 'fart' };
+  return 0;
+}
+void foo(void *inWindow) {
+  static const struct E events[] = {
+    { 'cmds', 1 }
+  };
+  bork(hndlr, events);
+}
+