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, 16 insertions, 0 deletions

diff --git a/gcc/testsuite/g++.dg/cpp0x/constexpr-union.C b/gcc/testsuite/g++.dg/cpp0x/constexpr-union.C
new file mode 100644
index 000000000..b4613058e
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/constexpr-union.C
@@ -0,0 +1,16 @@
+// Test that we don't have to deal with type punning
+// FIXME Mike Miller thinks it should work
+// { dg-options -std=c++0x }
+
+union U
+{
+  float f;
+  unsigned char ca[sizeof(float)];
+};
+
+constexpr U u = { 1.0 };
+constexpr float f = u.f;
+constexpr unsigned char c = u.ca[0]; // { dg-error "U::ca" }
+
+constexpr double d = 1.0;
+constexpr unsigned char c2 = (unsigned char&)d; // { dg-error "char. glvalue" }