New testcase for PR450

llvm-svn: 16670

test/Regression/C++Frontend/2004-10-04-ExternalGlobalConstant.cpp.tr

@@ -0,0 +1,12 @@
+// RUN: %llvmgcc -xc++ -S -o - %s | grep %y | not grep constant
+
+struct Y {
+  int A;
+  Y();
+};
+
+// This global cannot be marked 'constant' because the ctor can modify it.
+extern const Y y;
+
+void foo(...);
+int bar() { foo(&y); }