fold-const (fold_unary_loc): New case.

	* fold-const (fold_unary_loc) <NON_LVALUE_EXPR>: New case.
	<CASE_CONVERT>: Pass arg0 instead of op0 to fold_convert_const.

From-SVN: r210518

gcc/ChangeLog

+2014-05-16  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* fold-const (fold_unary_loc) <NON_LVALUE_EXPR>: New case.
+	<CASE_CONVERT>: Pass arg0 instead of op0 to fold_convert_const.
+
 2014-05-16  Richard Biener  <rguenther@suse.de>
 
 	PR tree-optimization/61194

gcc/fold-const.c

@@ -7850,6 +7850,11 @@ fold_unary_loc (location_t loc, enum tree_code code, tree type, tree op0)
 	return fold_convert_loc (loc, type, op0);
       return NULL_TREE;
 
+    case NON_LVALUE_EXPR:
+      if (!maybe_lvalue_p (op0))
+	return fold_convert_loc (loc, type, op0);
+      return NULL_TREE;
+
     CASE_CONVERT:
     case FLOAT_EXPR:
     case FIX_TRUNC_EXPR:
@@ -8113,7 +8118,7 @@ fold_unary_loc (location_t loc, enum tree_code code, tree type, tree op0)
 	    }
 	}
 
-      tem = fold_convert_const (code, type, op0);
+      tem = fold_convert_const (code, type, arg0);
       return tem ? tem : NULL_TREE;
 
     case ADDR_SPACE_CONVERT_EXPR: