From: Jeffrey A Law <law@cygnus.com>
Date: Thu, 2 Sep 1999 09:37:20 +0000 (+0000)
Subject: fold-const.c (fold_range_test): Do not try to fold the range test if the rhs or lhs... 
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=a8c61259522b6380059d092abfb7ca9c61fc36bf;p=gcc.git

fold-const.c (fold_range_test): Do not try to fold the range test if the rhs or lhs has side effects.

	* fold-const.c (fold_range_test): Do not try to fold the range
	test if the rhs or lhs has side effects.

From-SVN: r29058
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 42f596bbd45..a40330ddf56 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -13,6 +13,9 @@ Thu Sep  2 00:43:59 1999  Finn Hakansson  <finn@axis.com>
 
 Thu Sep  2 00:06:43 1999  Jeffrey A Law  (law@cygnus.com)
 
+	* fold-const.c (fold_range_test): Do not try to fold the range
+	test if the rhs or lhs has side effects.
+
 	* combine.c (simplify_rtx): Recognize another case of a synthesized
 	sign extension.
 
diff --git a/gcc/fold-const.c b/gcc/fold-const.c
index ed353f89627..3cde5f539b0 100644
--- a/gcc/fold-const.c
+++ b/gcc/fold-const.c
@@ -3560,6 +3560,10 @@ fold_range_test (exp)
   tree rhs = make_range (TREE_OPERAND (exp, 1), &in1_p, &low1, &high1);
   tree tem;
 
+  /* Fail if anything is volatile.  */
+  if (TREE_SIDE_EFFECTS (lhs) || TREE_SIDE_EFFECTS (rhs))
+    return 0;
+
   /* If this is an OR operation, invert both sides; we will invert
      again at the end.  */
   if (or_op)