1 files changed, 4 insertions, 0 deletions
diff --git a/gcc/expr.c b/gcc/expr.c
index 6ad93c5..26eaab0 100644
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -6553,6 +6553,10 @@ expand_operands (tree exp0, tree exp1, rtx target, rtx *op0, rtx *op1,
     }
   else
     {
+      /* If we need to preserve evaluation order, copy exp0 into its own
+	 temporary variable so that it can't be clobbered by exp1.  */
+      if (flag_evaluation_order && TREE_SIDE_EFFECTS (exp1))
+	exp0 = save_expr (exp0);
       *op0 = expand_expr (exp0, target, VOIDmode, modifier);
       *op1 = expand_expr (exp1, NULL_RTX, VOIDmode, modifier);
     }