From e7866ab1801719d4a3c17441051d05910e89719b Mon Sep 17 00:00:00 2001 From: Craig Topper Date: Thu, 13 Apr 2017 21:49:48 +0000 Subject: [PATCH] [InstCombine] Use APInt::getBitsSetFrom instead of inverting the result of getLowBitsSet. NFC git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300265 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Transforms/InstCombine/InstCombineCompares.cpp | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/lib/Transforms/InstCombine/InstCombineCompares.cpp b/lib/Transforms/InstCombine/InstCombineCompares.cpp index 2419d4f3288..5a292ef849e 100644 --- a/lib/Transforms/InstCombine/InstCombineCompares.cpp +++ b/lib/Transforms/InstCombine/InstCombineCompares.cpp @@ -3810,16 +3810,14 @@ static APInt getDemandedBitsLHSMask(ICmpInst &I, unsigned BitWidth, // greater than the RHS must differ in a bit higher than these due to carry. case ICmpInst::ICMP_UGT: { unsigned trailingOnes = RHS.countTrailingOnes(); - APInt lowBitsSet = APInt::getLowBitsSet(BitWidth, trailingOnes); - return ~lowBitsSet; + return APInt::getBitsSetFrom(BitWidth, trailingOnes); } // Similarly, for a ULT comparison, we don't care about the trailing zeros. // Any value less than the RHS must differ in a higher bit because of carries. case ICmpInst::ICMP_ULT: { unsigned trailingZeros = RHS.countTrailingZeros(); - APInt lowBitsSet = APInt::getLowBitsSet(BitWidth, trailingZeros); - return ~lowBitsSet; + return APInt::getBitsSetFrom(BitWidth, trailingZeros); } default: -- 2.11.0