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, 33 insertions, 0 deletions

diff --git a/gcc/testsuite/g++.dg/tree-ssa/pr22488.C b/gcc/testsuite/g++.dg/tree-ssa/pr22488.C
new file mode 100644
index 000000000..9063b067a
--- /dev/null
+++ b/gcc/testsuite/g++.dg/tree-ssa/pr22488.C
@@ -0,0 +1,33 @@
+// PR tree-optimization/22488
+// This testcase is really a C++ FE bug in represnting virtual inheritance
+// It gives the appearance to the middle end that the fields exist twice
+// which resulted in a very confused structure analyzer
+// { dg-do compile }
+// { dg-options "-O" }
+struct X
+{
+    int i0, i1;
+      char c;
+};
+
+struct A
+{
+    int i;
+      char c0, c1;
+
+        virtual ~A();
+};
+
+struct B : virtual A {};
+
+struct C : B
+{
+    X x;
+
+      void bar(X y) { x = y; }
+};
+
+void foo()
+{
+    C().bar(X());
+}