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, 97 insertions, 0 deletions

diff --git a/gcc/testsuite/g++.dg/opt/nrv15.C b/gcc/testsuite/g++.dg/opt/nrv15.C
new file mode 100644
index 000000000..23511b284
--- /dev/null
+++ b/gcc/testsuite/g++.dg/opt/nrv15.C
@@ -0,0 +1,97 @@
+// PR debug/39086
+// { dg-options "-g -O -fno-tree-sra" }
+
+struct A { int v; };
+
+A ax;
+
+struct B
+{
+  static A f1 () { return ax; }
+  static bool f2 ();
+  static A f3 ();
+};
+
+struct C
+{
+  A f4 ()
+  {
+    A x;
+    if (__builtin_expect (this->f6 () < this->f12 (), true))
+      x = B::f1 ();
+    else
+      x = this->f7 ();
+    return x;
+  }
+  A f5 ()
+  {
+    A y;
+    if (this->f6 () < this->f12 ())
+      y = B::f1 ();
+    else
+      y = this->f7 ();
+    return y;
+  }
+  void *f6 () const;
+  void *f12 () const;
+  virtual A f7 ();
+};
+
+C *dx;
+
+struct D
+{
+  C *f8 () const;
+};
+
+class E : virtual public D
+{
+  void f11 ();
+  void f9 ();
+  void f10 ();
+};
+
+struct G
+{
+  explicit G ();
+  operator bool () const;
+};
+
+void
+E::f11 (void)
+{
+  A d = B::f3 ();
+  d = this->f8 ()->f4 ();
+}
+
+void
+E::f9 ()
+{
+  G c;
+  if (c)
+    {
+      const A e = B::f3 ();
+      C * f = this->f8 ();
+      A d = f->f5 ();
+      if (B::f2 ())
+	;
+      else if (B::f2 ())
+	f->f4 ();
+    }
+}
+
+void
+E::f10 ()
+{
+  G c;
+  if (c)
+    {
+      const A e = B::f3 ();
+      C * f = this->f8 ();
+      A d = f->f5 ();
+      if (B::f2 ())
+	;
+      else if (B::f2 ())
+	f->f4 ();
+    }
+}