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Make the operations of APInt variables more efficient.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36260 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Zhou Sheng 2007-04-19 05:35:00 +00:00
parent 3f520a7111
commit 223d65b651
1 changed files with 21 additions and 27 deletions
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48
lib/Transforms/Scalar/PredicateSimplifier.cpp
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@ -747,35 +747,34 @@ namespace {
case ICmpInst::ICMP_SLT:
return ConstantRange(APInt::getSignedMinValue(W), CR.getSignedMax());
case ICmpInst::ICMP_ULE: {
APInt UMax = CR.getUnsignedMax();
APInt UMax(CR.getUnsignedMax());
if (UMax == APInt::getMaxValue(W))
return ConstantRange(W);
return ConstantRange(APInt::getMinValue(W), UMax + 1);
}
case ICmpInst::ICMP_SLE: {
APInt SMax = CR.getSignedMax();
APInt SMax(CR.getSignedMax());
if (SMax == APInt::getSignedMaxValue(W) ||
SMax + 1 == APInt::getSignedMaxValue(W))
return ConstantRange(W);
return ConstantRange(APInt::getSignedMinValue(W), SMax + 1);
}
case ICmpInst::ICMP_UGT:
return ConstantRange(CR.getUnsignedMin() + 1,
APInt::getMaxValue(W) + 1);
return ConstantRange(CR.getUnsignedMin() + 1, APInt::getNullValue(W));
case ICmpInst::ICMP_SGT:
return ConstantRange(CR.getSignedMin() + 1,
APInt::getSignedMaxValue(W) + 1);
APInt::getSignedMinValue(W));
case ICmpInst::ICMP_UGE: {
APInt UMin = CR.getUnsignedMin();
APInt UMin(CR.getUnsignedMin());
if (UMin == APInt::getMinValue(W))
return ConstantRange(W);
return ConstantRange(UMin, APInt::getMaxValue(W) + 1);
return ConstantRange(UMin, APInt::getNullValue(W));
}
case ICmpInst::ICMP_SGE: {
APInt SMin = CR.getSignedMin();
APInt SMin(CR.getSignedMin());
if (SMin == APInt::getSignedMinValue(W))
return ConstantRange(W);
return ConstantRange(SMin, APInt::getSignedMaxValue(W) + 1);
return ConstantRange(SMin, APInt::getSignedMinValue(W));
}
}
}
@ -969,16 +968,16 @@ namespace {
ConstantRange NewCR2(CR1.getUpper(), CR1.getLower());
applyRange(V2, NewCR2, Subtree, VRP);
} else if (*I == CR2.getLower()) {
APInt NewLower = CR2.getLower() + 1,
NewUpper = CR2.getUpper();
APInt NewLower(CR2.getLower() + 1),
NewUpper(CR2.getUpper());
if (NewLower == NewUpper)
NewLower = NewUpper = APInt::getMinValue(W);
ConstantRange NewCR2(NewLower, NewUpper);
applyRange(V2, NewCR2, Subtree, VRP);
} else if (*I == CR2.getUpper() - 1) {
APInt NewLower = CR2.getLower(),
NewUpper = CR2.getUpper() - 1;
APInt NewLower(CR2.getLower()),
NewUpper(CR2.getUpper() - 1);
if (NewLower == NewUpper)
NewLower = NewUpper = APInt::getMinValue(W);
@ -992,16 +991,16 @@ namespace {
ConstantRange NewCR1(CR2.getUpper(), CR2.getLower());
applyRange(V1, NewCR1, Subtree, VRP);
} else if (*I == CR1.getLower()) {
APInt NewLower = CR1.getLower() + 1,
NewUpper = CR1.getUpper();
APInt NewLower(CR1.getLower() + 1),
NewUpper(CR1.getUpper());
if (NewLower == NewUpper)
NewLower = NewUpper = APInt::getMinValue(W);
ConstantRange NewCR1(NewLower, NewUpper);
applyRange(V1, NewCR1, Subtree, VRP);
} else if (*I == CR1.getUpper() - 1) {
APInt NewLower = CR1.getLower(),
NewUpper = CR1.getUpper() - 1;
APInt NewLower(CR1.getLower()),
NewUpper(CR1.getUpper() - 1);
if (NewLower == NewUpper)
NewLower = NewUpper = APInt::getMinValue(W);
@ -2242,10 +2241,8 @@ namespace {
VRPSolver VRP(IG, UB, VR, PS->Forest, PS->modified, &SI);
uint32_t SrcBitWidth = cast<IntegerType>(SI.getSrcTy())->getBitWidth();
uint32_t DstBitWidth = cast<IntegerType>(SI.getDestTy())->getBitWidth();
APInt Min(APInt::getSignedMinValue(SrcBitWidth));
APInt Max(APInt::getSignedMaxValue(SrcBitWidth));
Min.sext(DstBitWidth);
Max.sext(DstBitWidth);
APInt Min(APInt::getHighBitsSet(DstBitWidth, DstBitWidth-SrcBitWidth+1));
APInt Max(APInt::getLowBitsSet(DstBitWidth, SrcBitWidth-1));
VRP.add(ConstantInt::get(Min), &SI, ICmpInst::ICMP_SLE);
VRP.add(ConstantInt::get(Max), &SI, ICmpInst::ICMP_SGE);
VRP.solve();
@ -2255,8 +2252,7 @@ namespace {
VRPSolver VRP(IG, UB, VR, PS->Forest, PS->modified, &ZI);
uint32_t SrcBitWidth = cast<IntegerType>(ZI.getSrcTy())->getBitWidth();
uint32_t DstBitWidth = cast<IntegerType>(ZI.getDestTy())->getBitWidth();
APInt Max(APInt::getMaxValue(SrcBitWidth));
Max.zext(DstBitWidth);
APInt Max(APInt::getLowBitsSet(DstBitWidth, SrcBitWidth));
VRP.add(ConstantInt::get(Max), &ZI, ICmpInst::ICMP_UGE);
VRP.solve();
}
@ -2353,14 +2349,12 @@ namespace {
case ICmpInst::ICMP_SLT:
case ICmpInst::ICMP_ULT:
if (Op1->getValue() != 0)
NextVal = cast<ConstantInt>(ConstantExpr::getSub(
Op1, ConstantInt::get(Op1->getType(), 1)));
NextVal = ConstantInt::get(Op1->getValue()-1);
break;
case ICmpInst::ICMP_SGT:
case ICmpInst::ICMP_UGT:
if (!Op1->getValue().isAllOnesValue())
NextVal = cast<ConstantInt>(ConstantExpr::getAdd(
Op1, ConstantInt::get(Op1->getType(), 1)));
NextVal = ConstantInt::get(Op1->getValue()+1);
break;
}