obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.

1 files changed, 37 insertions, 0 deletions

diff --git a/gcc/testsuite/g++.dg/tree-ssa/pr20458.C b/gcc/testsuite/g++.dg/tree-ssa/pr20458.C
new file mode 100644
index 000000000..d4e7d1a1a
--- /dev/null
+++ b/gcc/testsuite/g++.dg/tree-ssa/pr20458.C
@@ -0,0 +1,37 @@
+/* { dg-do run } */
+/* { dg-options "-O2" } */
+
+/* The tail call optimization would inapproriately tail call the 
+   destructors due to not recognizing a call clobbered variable */
+namespace std
+{
+	class locale
+	{
+		public:
+			locale();
+			~locale();
+	};
+}
+
+struct B
+{
+	std::locale _M_buf_locale;
+	virtual ~B() {}
+};
+
+struct C : public B
+{
+	char *s;
+};
+
+void foo ()
+{
+	C c;
+}
+
+int main()
+{
+	foo ();
+	return 0;
+}
+