re PR middle-end/52750 (32xsigned char __builtin_shuffle)

	PR middle-end/52750
	* tree-vect-generic.c (vector_element): Perform multiplication
	for pos in bitsizetype type instead of idx type.

	* gcc.c-torture/compile/pr52750.c: New test.

From-SVN: r185914

gcc/ChangeLog

+2012-03-28  Jakub Jelinek  <jakub@redhat.com>
+
+	PR middle-end/52750
+	* tree-vect-generic.c (vector_element): Perform multiplication
+	for pos in bitsizetype type instead of idx type.
+
 2012-03-28  Richard Guenther  <rguenther@suse.de>
 
 	* loop-init.c (loop_optimizer_init): If loops are preserved

gcc/testsuite/ChangeLog

+2012-03-28  Jakub Jelinek  <jakub@redhat.com>
+
+	PR middle-end/52750
+	* gcc.c-torture/compile/pr52750.c: New test.
+
 2012-03-28  Georg-Johann Lay  <avr@gjlay.de>
 
 	PR target/52692

gcc/testsuite/gcc.c-torture/compile/pr52750.c

+/* PR middle-end/52750 */
+
+typedef signed char V __attribute__((vector_size (32)));
+
+void
+foo (V *x)
+{
+  V m = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
+	  16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31};
+  *x = __builtin_shuffle (*x, m);
+}

gcc/tree-vect-generic.c

@@ -567,8 +567,9 @@ vector_element (gimple_stmt_iterator *gsi, tree vect, tree idx, tree *ptmpvec)
       else
         {
 	  tree size = TYPE_SIZE (vect_elt_type);
-          tree pos = fold_build2 (MULT_EXPR, TREE_TYPE (idx), idx, size);
-          return fold_build3 (BIT_FIELD_REF, vect_elt_type, vect, size, pos);
+	  tree pos = fold_build2 (MULT_EXPR, bitsizetype, bitsize_int (index),
+				  size);
+	  return fold_build3 (BIT_FIELD_REF, vect_elt_type, vect, size, pos);
         }
     }