Remove dead variable, const-ref-ize an APInt.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123248 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Transforms/InstCombine/InstCombineCompares.cpp b/lib/Transforms/InstCombine/InstCombineCompares.cpp
index 985d9129b3e4c2e583a9203fde3e38f3dbf24099..bd339742ef2f6b51e542b9289813d7de6c7a0063 100644 (file)
--- a/lib/Transforms/InstCombine/InstCombineCompares.cpp
+++ b/lib/Transforms/InstCombine/InstCombineCompares.cpp
@@ -1703,9 +1703,7 @@ static APInt DemandedBitsLHSMask(ICmpInst &I,
   
   ConstantInt *CI = dyn_cast<ConstantInt>(I.getOperand(1));
   if (!CI) return APInt::getAllOnesValue(BitWidth);
-  
-  APInt RHS = CI->getValue();
-  APInt Mask(BitWidth, 0);
+  const APInt &RHS = CI->getValue();
   
   switch (I.getPredicate()) {
   // For a UGT comparison, we don't care about any bits that 
@@ -1730,7 +1728,6 @@ static APInt DemandedBitsLHSMask(ICmpInst &I,
     return APInt::getAllOnesValue(BitWidth);
   }
   
-  return Mask;
 }
 
 Instruction *InstCombiner::visitICmpInst(ICmpInst &I) {