re PR ipa/64153 (r218205 miscompiles libgomp)

2014-12-03  Martin Jambor  <mjambor@suse.cz>

	PR ipa/64153
	* ipa-inline-analysis.c (evaluate_conditions_for_known_args): Check
	type sizes before view_converting.

From-SVN: r218316

gcc/ChangeLog

+2014-12-03  Martin Jambor  <mjambor@suse.cz>
+
+	PR ipa/64153
+	* ipa-inline-analysis.c (evaluate_conditions_for_known_args): Check
+	type sizes before view_converting.
+
 2014-12-03  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR rtl-optimization/64151

gcc/ipa-inline-analysis.c

@@ -880,12 +880,19 @@ evaluate_conditions_for_known_args (struct cgraph_node *node,
 	}
       if (c->code == IS_NOT_CONSTANT || c->code == CHANGED)
 	continue;
-      val = fold_unary (VIEW_CONVERT_EXPR, TREE_TYPE (c->val), val);
-      res = val
-	? fold_binary_to_constant (c->code, boolean_type_node, val, c->val)
-	: NULL;
-      if (res && integer_zerop (res))
-	continue;
+
+      if (operand_equal_p (TYPE_SIZE (TREE_TYPE (c->val)),
+			   TYPE_SIZE (TREE_TYPE (val)), 0))
+	{
+	  val = fold_unary (VIEW_CONVERT_EXPR, TREE_TYPE (c->val), val);
+
+	  res = val
+	    ? fold_binary_to_constant (c->code, boolean_type_node, val, c->val)
+	    : NULL;
+
+	  if (res && integer_zerop (res))
+	    continue;
+	}
       clause |= 1 << (i + predicate_first_dynamic_condition);
     }
   return clause;