Migrate 2007-10-01-StructResize.cpp from llvm/test/FrontendC++.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@138117 91177308-0d34-0410-b5e6-96231b3b80d8

test/CodeGenCXX/2007-10-01-StructResize.cpp

@@ -0,0 +1,13 @@
+// RUN: %clang_cc1 -emit-llvm %s -o /dev/null
+
+#pragma pack(4)
+
+struct Bork {
+  unsigned int f1 : 3;
+  unsigned int f2 : 30;
+};
+
+int Foo(Bork *hdr) {
+  hdr->f1 = 7;
+  hdr->f2 = 927;
+}