re PR tree-optimization/59622 (internal compiler error: verify_gimple failed)

	PR tree-optimization/59622
	* gimple-fold.c (gimple_fold_call): Don't replace OBJ_TYPE_REF
	call fndecl with 0 possible targets with BUILT_IN_UNREACHABLE,
	instead only for !inplace add a __builtin_unreachable () call
	before the call.

	* g++.dg/opt/pr59622.C: New test.

From-SVN: r206264

gcc/ChangeLog

+2013-12-31  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/59622
+	* gimple-fold.c (gimple_fold_call): Don't replace OBJ_TYPE_REF
+	call fndecl with 0 possible targets with BUILT_IN_UNREACHABLE,
+	instead only for !inplace add a __builtin_unreachable () call
+	before the call.
+
 2013-12-31  Alexander Ivchenko  <alexander.ivchenko@intel.com>
 	    Maxim Kuznetsov  <maxim.kuznetsov@intel.com>
 	    Sergey Lega  <sergey.s.lega@intel.com>

gcc/gimple-fold.c

@@ -1184,13 +1184,19 @@ gimple_fold_call (gimple_stmt_iterator *gsi, bool inplace)
 	    = possible_polymorphic_call_targets (callee, &final);
 	  if (final && targets.length () <= 1)
 	    {
-	      tree fndecl;
 	      if (targets.length () == 1)
-		fndecl = targets[0]->decl;
-	      else
-		fndecl = builtin_decl_implicit (BUILT_IN_UNREACHABLE);
-	      gimple_call_set_fndecl (stmt, fndecl);
-	      changed = true;
+		{
+		  gimple_call_set_fndecl (stmt, targets[0]->decl);
+		  changed = true;
+		}
+	      else if (!inplace)
+		{
+		  tree fndecl = builtin_decl_implicit (BUILT_IN_UNREACHABLE);
+		  gimple new_stmt = gimple_build_call (fndecl, 0);
+		  gimple_set_location (new_stmt, gimple_location (stmt));
+		  gsi_insert_before (gsi, new_stmt, GSI_SAME_STMT);
+		  return true;
+		}
 	    }
 	}
     }

gcc/testsuite/ChangeLog

+2013-12-31  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/59622
+	* g++.dg/opt/pr59622.C: New test.
+
 2013-12-31  Alexander Ivchenko  <alexander.ivchenko@intel.com>
 	    Maxim Kuznetsov  <maxim.kuznetsov@intel.com>
 	    Sergey Lega  <sergey.s.lega@intel.com>

gcc/testsuite/g++.dg/opt/pr59622.C

+// PR tree-optimization/59622
+// { dg-do compile }
+// { dg-options "-O2" }
+
+namespace
+{
+  struct A
+  {
+    virtual int foo ();
+    int bar () { return foo (); }
+  };
+}
+
+int
+baz ()
+{
+  A a;
+  return a.bar ();
+}