re PR tree-optimization/61917 (ICE on valid code at -O3 on x86_64-linux-gnu in…

re PR tree-optimization/61917 (ICE on valid code at -O3 on x86_64-linux-gnu in vectorizable_reduction, at tree-vect-loop.c:4913)

2015-02-25  Richard Biener  <rguenther@suse.de>
	Kai Tietz  <ktietz@redhat.com>

	PR tree-optimization/61917
	* tree-vect-loop.c (vectorizable_reduction): Allow
	vect_internal_def without reduction to exit graceful.


Co-Authored-By: Kai Tietz <ktietz@redhat.com>

From-SVN: r220966

gcc/ChangeLog

+2015-02-25  Richard Biener  <rguenther@suse.de>
+	Kai Tietz  <ktietz@redhat.com>
+
+	PR tree-optimization/61917
+	* tree-vect-loop.c (vectorizable_reduction): Allow
+	vect_internal_def without reduction to exit graceful.
+
 2015-02-25  Georg-Johann Lay  <avr@gjlay.de>
 
 	PR target/65196

gcc/tree-vect-loop.c

@@ -4981,6 +4981,12 @@ vectorizable_reduction (gimple stmt, gimple_stmt_iterator *gsi,
   if (!vectype_in)
     vectype_in = tem;
   gcc_assert (is_simple_use);
+  if (!found_nested_cycle_def)
+    reduc_def_stmt = def_stmt;
+
+  if (gimple_code (reduc_def_stmt) != GIMPLE_PHI)
+    return false;
+
   if (!(dt == vect_reduction_def
 	|| dt == vect_nested_cycle
 	|| ((dt == vect_internal_def || dt == vect_external_def
@@ -4993,10 +4999,7 @@ vectorizable_reduction (gimple stmt, gimple_stmt_iterator *gsi,
       gcc_assert (orig_stmt);
       return false;
     }
-  if (!found_nested_cycle_def)
-    reduc_def_stmt = def_stmt;
 
-  gcc_assert (gimple_code (reduc_def_stmt) == GIMPLE_PHI);
   if (orig_stmt)
     gcc_assert (orig_stmt == vect_is_simple_reduction (loop_vinfo,
                                                        reduc_def_stmt,