re PR tree-optimization/49610 (Segfault with -ftree-vectorize (or -O3))

        PR tree-optimization/49610
        * tree-vect-loop.c (vect_is_slp_reduction): Check that DEF_STMT has
        a basic block.

From-SVN: r175786

gcc/ChangeLog

+2011-07-03  Ira Rosen  <ira.rosen@linaro.org>
+
+	PR tree-optimization/49610
+	* tree-vect-loop.c (vect_is_slp_reduction): Check that DEF_STMT has
+	a basic block.
+
 2011-07-02  Eric Botcazou  <ebotcazou@adacore.com>
 	    Olivier Hainque  <hainque@adacore.com>
 	    Nicolas Setton  <setton@adacore.com>

gcc/testsuite/ChangeLog

+2011-07-03  Ira Rosen  <ira.rosen@linaro.org>
+
+	PR tree-optimization/49610
+	* gcc.dg/vect/pr49610.c: New test.
+
 2011-07-02  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* gnat.dg/specs/debug1.ads: New test.

gcc/testsuite/gcc.dg/vect/pr49610.c

+/* { dg-do compile } */
+
+extern int g_7;
+void func_13(int p_17) {
+  int i;
+    for (i=0; i < 16; i = (signed char)(i+1)) { 
+        g_7 &= p_17;
+        g_7 &= (p_17 > 1);
+    }
+}
+
+/* { dg-final { cleanup-tree-dump "vect" } } */

gcc/tree-vect-loop.c

@@ -1823,6 +1823,7 @@ vect_is_slp_reduction (loop_vec_info loop_info, gimple phi, gimple first_stmt)
 	     ("vect_internal_def"), or it's an induction (defined by a
 	     loop-header phi-node).  */
           if (def_stmt
+              && gimple_bb (def_stmt)
 	      && flow_bb_inside_loop_p (loop, gimple_bb (def_stmt))
               && (is_gimple_assign (def_stmt)
                   || is_gimple_call (def_stmt)
@@ -1852,6 +1853,7 @@ vect_is_slp_reduction (loop_vec_info loop_info, gimple phi, gimple first_stmt)
             ("vect_internal_def"), or it's an induction (defined by a
             loop-header phi-node).  */
           if (def_stmt
+              && gimple_bb (def_stmt)
 	      && flow_bb_inside_loop_p (loop, gimple_bb (def_stmt))
               && (is_gimple_assign (def_stmt)
                   || is_gimple_call (def_stmt)