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Make the apint construction more effective. 

llvm-svn: 35960
This commit is contained in:
Zhou Sheng 2007-04-13 05:57:32 +00:00
parent e71f1447f7
commit 01c175ec52
1 changed files with 3 additions and 3 deletions
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6
llvm/lib/Support/ConstantRange.cpp
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@ -108,7 +108,7 @@ APInt ConstantRange::getUnsignedMin() const {
/// ConstantRange. /// ConstantRange.
/// ///
APInt ConstantRange::getSignedMax() const { APInt ConstantRange::getSignedMax() const {
APInt SignedMax = APInt::getSignedMaxValue(getBitWidth()); APInt SignedMax(APInt::getSignedMaxValue(getBitWidth()));
if (!isWrappedSet()) { if (!isWrappedSet()) {
if (getLower().slt(getUpper() - 1)) if (getLower().slt(getUpper() - 1))
return getUpper() - 1; return getUpper() - 1;
@ -130,7 +130,7 @@ APInt ConstantRange::getSignedMax() const {
/// ConstantRange. /// ConstantRange.
/// ///
APInt ConstantRange::getSignedMin() const { APInt ConstantRange::getSignedMin() const {
APInt SignedMin = APInt::getSignedMinValue(getBitWidth()); APInt SignedMin(APInt::getSignedMinValue(getBitWidth()));
if (!isWrappedSet()) { if (!isWrappedSet()) {
if (getLower().slt(getUpper() - 1)) if (getLower().slt(getUpper() - 1))
return getLower(); return getLower();
@ -370,7 +370,7 @@ ConstantRange ConstantRange::signExtend(uint32_t DstTySize) const {
ConstantRange ConstantRange::truncate(uint32_t DstTySize) const { ConstantRange ConstantRange::truncate(uint32_t DstTySize) const {
unsigned SrcTySize = getBitWidth(); unsigned SrcTySize = getBitWidth();
assert(SrcTySize > DstTySize && "Not a value truncation"); assert(SrcTySize > DstTySize && "Not a value truncation");
APInt Size = APInt::getMaxValue(DstTySize).zext(SrcTySize); APInt Size(APInt::getLowBitsSet(SrcTySize, DstTySize));
if (isFullSet() || getSetSize().ugt(Size)) if (isFullSet() || getSetSize().ugt(Size))
return ConstantRange(DstTySize); return ConstantRange(DstTySize);