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Just use APFloat for const / const. Fixes 

-1. / -0.

llvm-svn: 42254
This commit is contained in:
Dale Johannesen 2007-09-24 00:32:45 +00:00
parent 071107120c
commit acbb26f125
1 changed files with 0 additions and 17 deletions
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17
llvm/lib/VMCore/ConstantFold.cpp
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@ -699,23 +699,6 @@ Constant *llvm::ConstantFoldBinaryInstruction(unsigned Opcode,
(void)C3V.multiply(C2V, APFloat::rmNearestTiesToEven);
return ConstantFP::get(CFP1->getType(), C3V);
case Instruction::FDiv:
// FIXME better to look at the return code
if (C2V.isZero())
if (C1V.isZero())
// IEEE 754, Section 7.1, #4
return ConstantFP::get(CFP1->getType(), isDouble ?
APFloat(std::numeric_limits<double>::quiet_NaN()) :
APFloat(std::numeric_limits<float>::quiet_NaN()));
else if (C2V.isNegZero() || C1V.isNegative())
// IEEE 754, Section 7.2, negative infinity case
return ConstantFP::get(CFP1->getType(), isDouble ?
APFloat(-std::numeric_limits<double>::infinity()) :
APFloat(-std::numeric_limits<float>::infinity()));
else
// IEEE 754, Section 7.2, positive infinity case
return ConstantFP::get(CFP1->getType(), isDouble ?
APFloat(std::numeric_limits<double>::infinity()) :
APFloat(std::numeric_limits<float>::infinity()));
(void)C3V.divide(C2V, APFloat::rmNearestTiesToEven);
return ConstantFP::get(CFP1->getType(), C3V);
case Instruction::FRem: