re PR tree-optimization/71259 (GCC trunk emits wrong code)

	PR tree-optimization/71259
	* tree-vect-slp.c (vect_get_constant_vectors): For
	VECTOR_BOOLEAN_TYPE_P, return all ones constant instead of
	one for constant op, and use COND_EXPR for non-constant.

	* gcc.dg/vect/pr71259.c: New test.

From-SVN: r237147

gcc/ChangeLog

+2016-06-06  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/71259
+	* tree-vect-slp.c (vect_get_constant_vectors): For
+	VECTOR_BOOLEAN_TYPE_P, return all ones constant instead of
+	one for constant op, and use COND_EXPR for non-constant.
+
 2016-06-06  David Malcolm  <dmalcolm@redhat.com>
 
 	* Makefile.in (OBJS): Add function-tests.o,

gcc/testsuite/ChangeLog

+2016-06-06  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/71259
+	* gcc.dg/vect/pr71259.c: New test.
+
 2016-06-06  David Malcolm  <dmalcolm@redhat.com>
 
 	* gcc.dg/plugin/levenshtein-test-1.c: Delete.

gcc/testsuite/gcc.dg/vect/pr71259.c

+/* PR tree-optimization/71259 */
+/* { dg-do run } */
+/* { dg-options "-O3" } */
+/* { dg-additional-options "-mavx" { target avx_runtime } } */
+
+#include "tree-vect.h"
+
+long a, b[1][44][2];
+long long c[44][17][2];
+
+int
+main ()
+{
+  int i, j, k;
+  check_vect ();
+  asm volatile ("" : : : "memory");
+  for (i = 0; i < 44; i++)
+    for (j = 0; j < 17; j++)
+      for (k = 0; k < 2; k++)
+	c[i][j][k] = (30995740 >= *(k + *(j + *b)) != (a != 8)) - 5105075050047261684;
+  asm volatile ("" : : : "memory");
+  for (i = 0; i < 44; i++) 
+    for (j = 0; j < 17; j++)
+      for (k = 0; k < 2; k++)
+	if (c[i][j][k] != -5105075050047261684)
+	  __builtin_abort ();
+  return 0;
+}

gcc/tree-vect-slp.c

@@ -3056,7 +3056,7 @@ vect_get_constant_vectors (tree op, slp_tree slp_node,
 		      if (integer_zerop (op))
 			op = build_int_cst (TREE_TYPE (vector_type), 0);
 		      else if (integer_onep (op))
-			op = build_int_cst (TREE_TYPE (vector_type), 1);
+			op = build_all_ones_cst (TREE_TYPE (vector_type));
 		      else
 			gcc_unreachable ();
 		    }
@@ -3071,8 +3071,14 @@ vect_get_constant_vectors (tree op, slp_tree slp_node,
 		  gimple *init_stmt;
 		  if (VECTOR_BOOLEAN_TYPE_P (vector_type))
 		    {
+		      tree true_val
+			= build_all_ones_cst (TREE_TYPE (vector_type));
+		      tree false_val
+			= build_zero_cst (TREE_TYPE (vector_type));
 		      gcc_assert (INTEGRAL_TYPE_P (TREE_TYPE (op)));
-		      init_stmt = gimple_build_assign (new_temp, NOP_EXPR, op);
+		      init_stmt = gimple_build_assign (new_temp, COND_EXPR,
+						       op, true_val,
+						       false_val);
 		    }
 		  else
 		    {