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[ConstantRange] Use APInt::operator-= to remove temporary APInts. 

llvm-svn: 301751
This commit is contained in:
Craig Topper 2017-04-29 17:46:11 +00:00
parent e9fdba39e0
commit 685327dd99
1 changed files with 4 additions and 4 deletions
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8
llvm/lib/IR/ConstantRange.cpp
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@ -597,7 +597,7 @@ ConstantRange ConstantRange::truncate(uint32_t DstTySize) const {
if (LowerDiv.uge(MaxValue)) {
APInt Div(getBitWidth(), 0);
APInt::udivrem(LowerDiv, MaxBitValue, Div, LowerDiv);
UpperDiv = UpperDiv - MaxBitValue * Div;
UpperDiv -= MaxBitValue * Div;
}
if (UpperDiv.ule(MaxValue))
@ -605,10 +605,10 @@ ConstantRange ConstantRange::truncate(uint32_t DstTySize) const {
UpperDiv.trunc(DstTySize)).unionWith(Union);
// The truncated value wraps around. Check if we can do better than fullset.
APInt UpperModulo = UpperDiv - MaxBitValue;
if (UpperModulo.ult(LowerDiv))
UpperDiv -= MaxBitValue;
if (UpperDiv.ult(LowerDiv))
return ConstantRange(LowerDiv.trunc(DstTySize),
UpperModulo.trunc(DstTySize)).unionWith(Union);
UpperDiv.trunc(DstTySize)).unionWith(Union);
return ConstantRange(DstTySize, /*isFullSet=*/true);
}