re PR tree-optimization/50763 (ICE: verify_gimple failed: missing PHI def with -ftree-tail-merge)

2011-11-04  Tom de Vries  <tom@codesourcery.com>

	PR tree-optimization/50763
	* g++.dg/pr50763-4.C: New test.

From-SVN: r180936

gcc/testsuite/ChangeLog

+2011-11-04  Tom de Vries  <tom@codesourcery.com>
+
+	PR tree-optimization/50763
+	* g++.dg/pr50763-4.C: New test.
+
 2011-11-04  Jakub Jelinek  <jakub@redhat.com>
 
 	* gcc.dg/torture/vec-cvt-1.c: Enable commented out inttoflttestui

gcc/testsuite/g++.dg/pr50763-4.C

+/* { dg-do compile } */
+/* { dg-options "-O2 -ftree-tail-merge" } */
+
+float
+clamp (const float x)
+{
+  return x <= 1 ? 1 : x;
+}
+
+template < class T > struct VECTOR
+{
+  float x;
+};
+template < class TV > class JOINT
+{
+  virtual void Constrain_Angles (VECTOR < float >&angles) const;
+};
+
+template < class TV > class ANGLE_JOINT:public JOINT < TV >
+{
+  virtual ~ ANGLE_JOINT ()
+  {
+  }
+  void Constrain_Angles (VECTOR < float >&angles) const
+  {
+    VECTOR < float >v;
+    if (v.x)
+        v.x = clamp (angles.x);
+    else
+        v.x = angles.x;
+      angles.x = v.x;
+  }
+};
+template ANGLE_JOINT < int >::~ANGLE_JOINT ();