From 96f06cb6dda0ad26a734dea2f05dd07a246b7ef1 Mon Sep 17 00:00:00 2001 From: Richard Kenner Date: Thu, 8 May 1997 13:20:18 -0400 Subject: [PATCH] (fold, truth_andor): Disable optimization for side effects on RHS. From-SVN: r14047 --- gcc/fold-const.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/gcc/fold-const.c b/gcc/fold-const.c index 84e098a6c158..45311c91ed34 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -4791,12 +4791,14 @@ fold (expr) to A || (B && C). Note that either operator can be any of the four truth and/or operations and the transformation will still be valid. Also note that we only care about order for the - ANDIF and ORIF operators. */ + ANDIF and ORIF operators. If B contains side effects, this + might change the truth-value of A. */ if (TREE_CODE (arg0) == TREE_CODE (arg1) && (TREE_CODE (arg0) == TRUTH_ANDIF_EXPR || TREE_CODE (arg0) == TRUTH_ORIF_EXPR || TREE_CODE (arg0) == TRUTH_AND_EXPR - || TREE_CODE (arg0) == TRUTH_OR_EXPR)) + || TREE_CODE (arg0) == TRUTH_OR_EXPR) + && ! TREE_SIDE_EFFECTS (TREE_OPERAND (arg0, 1))) { tree a00 = TREE_OPERAND (arg0, 0); tree a01 = TREE_OPERAND (arg0, 1);