re PR tree-optimization/82285 (Optimizing error when using enumeration)

2017-09-25  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/82285
	* tree-vect-patterns.c (vect_recog_bool_pattern): Also handle
	enumeral types.

	* gcc.dg/torture/pr82285.c: New testcase.

From-SVN: r253146

gcc/ChangeLog

+2017-09-25  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/82285
+	* tree-vect-patterns.c (vect_recog_bool_pattern): Also handle
+	enumeral types.
+
 2017-09-25  Tom de Vries  <tom@codesourcery.com>
 
 	PR target/80035

gcc/testsuite/ChangeLog

+2017-09-25  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/82285
+	* gcc.dg/torture/pr82285.c: New testcase.
+
 2017-09-25  Justin Squirek  <squirek@adacore.com>
 
 	* gnat.dg/entry_family.adb: New testcase

gcc/testsuite/gcc.dg/torture/pr82285.c

+/* { dg-do run } */
+
+enum tst { first = 0, second = 1 };
+
+int
+main ()
+{
+  enum tst data[16];
+
+  for (unsigned i = 0; i < 16; i++)
+    data[i] = (i < 5 ? second : first);
+
+  if (data[2] != second)
+    __builtin_abort ();
+  return 0;
+}

gcc/tree-vect-patterns.c

@@ -3643,7 +3643,7 @@ vect_recog_bool_pattern (vec<gimple *> *stmts, tree *type_in,
   rhs_code = gimple_assign_rhs_code (last_stmt);
   if (CONVERT_EXPR_CODE_P (rhs_code))
     {
-      if (TREE_CODE (TREE_TYPE (lhs)) != INTEGER_TYPE
+      if (! INTEGRAL_TYPE_P (TREE_TYPE (lhs))
 	  || TYPE_PRECISION (TREE_TYPE (lhs)) == 1)
 	return NULL;
       vectype = get_vectype_for_scalar_type (TREE_TYPE (lhs));