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Floating point negates are -0.0 - X, not 0.0 - X

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11084 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-02-02 20:21:29 +00:00
parent 0517e72096
commit 84a102a780
1 changed files with 13 additions and 5 deletions
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12
lib/VMCore/iOperators.cpp
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@ -78,9 +78,14 @@ BinaryOperator *BinaryOperator::create(BinaryOps Op, Value *S1, Value *S2,
BinaryOperator *BinaryOperator::createNeg(Value *Op, const std::string &Name, BinaryOperator *BinaryOperator::createNeg(Value *Op, const std::string &Name,
Instruction *InsertBefore) { Instruction *InsertBefore) {
if (!Op->getType()->isFloatingPoint())
return new BinaryOperator(Instruction::Sub, return new BinaryOperator(Instruction::Sub,
Constant::getNullValue(Op->getType()), Op, Constant::getNullValue(Op->getType()), Op,
Op->getType(), Name, InsertBefore); Op->getType(), Name, InsertBefore);
else
return new BinaryOperator(Instruction::Sub,
ConstantFP::get(Op->getType(), -0.0), Op,
Op->getType(), Name, InsertBefore);
} }
BinaryOperator *BinaryOperator::createNot(Value *Op, const std::string &Name, BinaryOperator *BinaryOperator::createNot(Value *Op, const std::string &Name,
@ -98,8 +103,11 @@ static inline bool isConstantAllOnes(const Value *V) {
bool BinaryOperator::isNeg(const Value *V) { bool BinaryOperator::isNeg(const Value *V) {
if (const BinaryOperator *Bop = dyn_cast<BinaryOperator>(V)) if (const BinaryOperator *Bop = dyn_cast<BinaryOperator>(V))
return Bop->getOpcode() == Instruction::Sub && if (Bop->getOpcode() == Instruction::Sub)
Bop->getOperand(0) == Constant::getNullValue(Bop->getType()); if (!V->getType()->isFloatingPoint())
return Bop->getOperand(0) == Constant::getNullValue(Bop->getType());
else
return Bop->getOperand(0) == ConstantFP::get(Bop->getType(), -0.0);
return false; return false;
} }