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, 28 insertions, 0 deletions

diff --git a/gcc/testsuite/g++.dg/tree-ssa/pr8781.C b/gcc/testsuite/g++.dg/tree-ssa/pr8781.C
new file mode 100644
index 000000000..a9d279af7
--- /dev/null
+++ b/gcc/testsuite/g++.dg/tree-ssa/pr8781.C
@@ -0,0 +1,28 @@
+/* { dg-do compile } */
+/* { dg-options "-O -fdump-tree-fre-details" } */
+
+int f();
+
+template<typename predicate>
+class noop_t {
+    const predicate &pred;
+public:
+    explicit noop_t(const predicate &p) : pred(p) {}
+
+    int operator()() const { return pred(); }
+};
+
+template<typename predicate>
+inline noop_t<predicate> noop(const predicate pred) {
+    return noop_t<predicate>(pred);
+}
+
+int x()
+{
+  return (noop(noop(noop(noop(noop(noop(noop(noop(noop(f)))))))))());
+}
+
+/* We should optimize this to a direct call.  */
+
+/* { dg-final { scan-tree-dump "Replacing call target with f" "fre" } } */
+/* { dg-final { cleanup-tree-dump "fre" } } */