From: J"orn Rennecke <amylaar@cygnus.co.uk>
Date: Fri, 14 Nov 1997 00:38:08 +0000 (+0000)
Subject: * fold-const.c (fold_truthop): Fix bug in last change.
X-Git-Tag: releases/libf2c-0.5.21~581
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=9f29ca789b773476c2a756542d0a0771edb2c047;p=thirdparty%2Fgcc.git

* fold-const.c (fold_truthop): Fix bug in last change.

From-SVN: r16473
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 12cac79d33c2..c7070529a9d3 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+Thu Nov 13 23:33:50 1997  J"orn Rennecke <amylaar@cygnus.co.uk>
+
+	* fold-const.c (fold_truthop): Fix bug in last change.
+
 1997-11-13  Paul Eggert  <eggert@twinsun.com>
 
 	Fix some confusion with IEEE minus zero.
diff --git a/gcc/fold-const.c b/gcc/fold-const.c
index 4b4c5e184b4c..0f5a19f9e992 100644
--- a/gcc/fold-const.c
+++ b/gcc/fold-const.c
@@ -3425,7 +3425,7 @@ fold_truthop (code, truth_type, lhs, rhs)
     {
       if (l_const && integer_zerop (l_const) && integer_pow2p (ll_mask))
 	{
-	  if (ll_unsignedp)
+	  if (ll_unsignedp || tree_log2 (ll_mask) + 1 < ll_bitsize)
 	    l_const = ll_mask;
 	else
 	  /* Since ll_arg is a single bit bit mask, we can sign extend
@@ -3443,7 +3443,7 @@ fold_truthop (code, truth_type, lhs, rhs)
     {
       if (r_const && integer_zerop (r_const) && integer_pow2p (rl_mask))
 	{
-	  if (rl_unsignedp)
+	  if (rl_unsignedp || tree_log2 (rl_mask) + 1 < rl_bitsize)
 	    r_const = rl_mask;
 	else
 	  /* This is analogous to the code for l_const above.  */