From: Zhou Sheng <zhousheng00@gmail.com>
Date: Wed, 28 Mar 2007 05:15:57 +0000 (+0000)
Subject: Use UnknownBIts[BitWidth-1] instead of UnknownBIts & SignBits.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=4acf155af3612a1a509e19479ea1e65a355d7531;p=oota-llvm.git

Use UnknownBIts[BitWidth-1] instead of UnknownBIts & SignBits.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35418 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp
index 72888091950..1c39f050f50 100644
--- a/lib/Transforms/Scalar/InstructionCombining.cpp
+++ b/lib/Transforms/Scalar/InstructionCombining.cpp
@@ -851,7 +851,7 @@ static void ComputeSignedMinMaxValuesFromKnownBits(const Type *Ty,
   Min = KnownOne;
   Max = KnownOne|UnknownBits;
   
-  if ((SignBit & UnknownBits) != 0) { // Sign bit is unknown
+  if (UnknownBits[BitWidth-1]) { // Sign bit is unknown
     Min |= SignBit;
     Max &= ~SignBit;
   }