re PR tree-optimization/63605 (wrong code at -O3 on x86_64-linux-gnu)

2014-11-07  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/63605
	* fold-const.c (fold_binary_loc): Properly use element_precision
	for types that may not be scalar.

	* gcc.dg/vect/pr63605.c: New testcase.

From-SVN: r217238

gcc/ChangeLog

+2014-11-07  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/63605
+	* fold-const.c (fold_binary_loc): Properly use element_precision
+	for types that may not be scalar.
+
 2014-11-07  Evgeny Stupachenko  <evstupac@gmail.com>
 
 	PR target/63534

gcc/fold-const.c

@@ -12817,7 +12817,7 @@ fold_binary_loc (location_t loc,
 	  tree arg00 = TREE_OPERAND (arg0, 0);
 	  tree arg01 = TREE_OPERAND (arg0, 1);
 	  tree itype = TREE_TYPE (arg00);
-	  if (wi::eq_p (arg01, TYPE_PRECISION (itype) - 1))
+	  if (wi::eq_p (arg01, element_precision (itype) - 1))
 	    {
 	      if (TYPE_UNSIGNED (itype))
 		{

gcc/testsuite/ChangeLog

+2014-11-07  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/63605
+	* gcc.dg/vect/pr63605.c: New testcase.
+
 2014-11-07  Jeff Law  <law@redhat.com>
 
 	* g++.dg/pr61289-2.C: Renamed from pr61289-2.c.

gcc/testsuite/gcc.dg/vect/pr63605.c

+/* { dg-do run } */
+
+#include "tree-vect.h"
+
+extern void abort (void);
+
+int a, b[8] = { 2, 0, 0, 0, 0, 0, 0, 0 }, c[8];
+
+int
+main ()
+{
+  int d;
+  check_vect ();
+  for (; a < 8; a++)
+    {
+      d = b[a] >> 1;
+      c[a] = d != 0;
+    }
+  if (c[0] != 1)
+    abort ();
+  return 0;
+}