re PR tree-optimization/50902 (intVar/dinternal.cc ICEs at -O2 -ftree-vectorize)

2011-11-02  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/50902
	* tree-vect-stmts.c (vectorizable_load): Properly convert
	an invariant initializer element.

	* gcc.dg/torture/pr50902.c: New testcase.

From-SVN: r180765

gcc/ChangeLog

+2011-11-02  Richard Guenther  <rguenther@suse.de>
+
+	PR tree-optimization/50902
+	* tree-vect-stmts.c (vectorizable_load): Properly convert
+	an invariant initializer element.
+
 2010-11-02  Richard Guenther  <rguenther@suse.de>
 
 	PR tree-optimization/50890

gcc/testsuite/ChangeLog

+2011-11-02  Richard Guenther  <rguenther@suse.de>
+
+	PR tree-optimization/50902
+	* gcc.dg/torture/pr50902.c: New testcase.
+
 2010-11-02  Richard Guenther  <rguenther@suse.de>
 
 	PR tree-optimization/50890

gcc/testsuite/gcc.dg/torture/pr50902.c

+/* { dg-do compile } */
+
+_Bool data[128];
+void foo (_Bool *init)
+{
+  int i;
+  for (i = 0; i < 128; i++)
+    data[i] = *init;
+}

gcc/tree-vect-stmts.c

@@ -4726,11 +4726,20 @@ vectorizable_load (gimple stmt, gimple_stmt_iterator *gsi, gimple *vec_stmt,
 	      /* 4. Handle invariant-load.  */
 	      if (inv_p && !bb_vinfo)
 		{
-		  tree vec_inv;
+		  tree tem, vec_inv;
 		  gimple_stmt_iterator gsi2 = *gsi;
 		  gcc_assert (!strided_load);
 		  gsi_next (&gsi2);
-		  vec_inv = build_vector_from_val (vectype, scalar_dest);
+		  tem = scalar_dest;
+		  if (!useless_type_conversion_p (TREE_TYPE (vectype),
+						  TREE_TYPE (tem)))
+		    {
+		      tem = fold_convert (TREE_TYPE (vectype), tem);
+		      tem = force_gimple_operand_gsi (&gsi2, tem, true,
+						      NULL_TREE, true,
+						      GSI_SAME_STMT);
+		    }
+		  vec_inv = build_vector_from_val (vectype, tem);
 		  new_temp = vect_init_vector (stmt, vec_inv,
 					       vectype, &gsi2);
 		  new_stmt = SSA_NAME_DEF_STMT (new_temp);