toplev.c (flag_evaluation_order): New global variable.

	* toplev.c (flag_evaluation_order): New global variable.
	* flags.h (flag_evaluation_order): Prototype here.
	* expr.c (expand_operands): If we need to preserve observable
	evaluation order, protect exp1 from clobbering exp0's result.

	* java/lang.c (java_init_options): Set flag_evaluation_order.
	* java/expr.c (force_evaluation_order): Don't attempt to force
	evaluation order of binary operations using save_expr.
	* java/parse.y (java_complete_lhs): No longer need to call
	force_evaluation_order when constructing binary operators.

From-SVN: r71873

1 files changed, 3 insertions, 0 deletions

diff --git a/gcc/toplev.c b/gcc/toplev.c
index 03485bc8aed..425a02597c1 100644
--- a/gcc/toplev.c
+++ b/gcc/toplev.c
@@ -988,6 +988,9 @@ int flag_trapv = 0;
 /* Nonzero if signed arithmetic overflow should wrap around.  */
 int flag_wrapv = 0;
 
+/* Nonzero if subexpressions must be evaluated from left-to-right.  */
+int flag_evaluation_order = 0;
+
 /* Add or remove a leading underscore from user symbols.  */
 int flag_leading_underscore = -1;