diff options
| author | Dale Johannesen <dalej@apple.com> | 2007-09-19 14:22:58 +0000 |
|---|---|---|
| committer | Dale Johannesen <dalej@apple.com> | 2007-09-19 14:22:58 +0000 |
| commit | ac1220551fa3a4dc8b1eea2584920b8f18d7b571 (patch) | |
| tree | 8924b0dd3182f33f147e6d713f09c83acf348f3f /lib/VMCore/ConstantFold.cpp | |
| parent | 46318cdfd024ac3d1cb491eec7e280059ef502e3 (diff) | |
| download | external_llvm-ac1220551fa3a4dc8b1eea2584920b8f18d7b571.zip external_llvm-ac1220551fa3a4dc8b1eea2584920b8f18d7b571.tar.gz external_llvm-ac1220551fa3a4dc8b1eea2584920b8f18d7b571.tar.bz2 | |
Fix some long double issues.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42133 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/VMCore/ConstantFold.cpp')
| -rw-r--r-- | lib/VMCore/ConstantFold.cpp | 40 |
1 files changed, 21 insertions, 19 deletions
diff --git a/lib/VMCore/ConstantFold.cpp b/lib/VMCore/ConstantFold.cpp index a61dd06..fb8b6db 100644 --- a/lib/VMCore/ConstantFold.cpp +++ b/lib/VMCore/ConstantFold.cpp @@ -178,30 +178,28 @@ Constant *llvm::ConstantFoldCastInstruction(unsigned opc, const Constant *V, case Instruction::FPTrunc: case Instruction::FPExt: if (const ConstantFP *FPC = dyn_cast<ConstantFP>(V)) { - APFloat Val = FPC->getValueAPF(); - Val.convert(DestTy==Type::FloatTy ? APFloat::IEEEsingle : - APFloat::IEEEdouble, + APFloat Val = FPC->getValueAPF(); + Val.convert(DestTy == Type::FloatTy ? APFloat::IEEEsingle : + DestTy == Type::DoubleTy ? APFloat::IEEEdouble : + DestTy == Type::X86_FP80Ty ? APFloat::x87DoubleExtended : + DestTy == Type::FP128Ty ? APFloat::IEEEquad : + APFloat::Bogus, APFloat::rmNearestTiesToEven); return ConstantFP::get(DestTy, Val); } return 0; // Can't fold. case Instruction::FPToUI: - if (const ConstantFP *FPC = dyn_cast<ConstantFP>(V)) { - APFloat V = FPC->getValueAPF(); - bool isDouble = &V.getSemantics()==&APFloat::IEEEdouble; - uint32_t DestBitWidth = cast<IntegerType>(DestTy)->getBitWidth(); - APInt Val(APIntOps::RoundDoubleToAPInt(isDouble ? V.convertToDouble() : - (double)V.convertToFloat(), DestBitWidth)); - return ConstantInt::get(Val); - } - return 0; // Can't fold. case Instruction::FPToSI: if (const ConstantFP *FPC = dyn_cast<ConstantFP>(V)) { APFloat V = FPC->getValueAPF(); - bool isDouble = &V.getSemantics()==&APFloat::IEEEdouble; + uint64_t x[2]; uint32_t DestBitWidth = cast<IntegerType>(DestTy)->getBitWidth(); - APInt Val(APIntOps::RoundDoubleToAPInt(isDouble ? V.convertToDouble() : - (double)V.convertToFloat(), DestBitWidth)); + APFloat::opStatus status = V.convertToInteger(x, DestBitWidth, + opc==Instruction::FPToSI, + APFloat::rmNearestTiesToEven); + if (status!=APFloat::opOK && status!=APFloat::opInexact) + return 0; // give up + APInt Val(DestBitWidth, 2, x); return ConstantInt::get(Val); } return 0; // Can't fold. @@ -215,11 +213,13 @@ Constant *llvm::ConstantFoldCastInstruction(unsigned opc, const Constant *V, return 0; // Other pointer types cannot be casted case Instruction::UIToFP: if (const ConstantInt *CI = dyn_cast<ConstantInt>(V)) { + double d = CI->getValue().signedRoundToDouble(); if (DestTy==Type::FloatTy) - return ConstantFP::get(DestTy, - APFloat((float)CI->getValue().roundToDouble())); + return ConstantFP::get(DestTy, APFloat((float)d)); + else if (DestTy==Type::DoubleTy) + return ConstantFP::get(DestTy, APFloat(d)); else - return ConstantFP::get(DestTy, APFloat(CI->getValue().roundToDouble())); + return 0; // FIXME do this for long double } return 0; case Instruction::SIToFP: @@ -227,8 +227,10 @@ Constant *llvm::ConstantFoldCastInstruction(unsigned opc, const Constant *V, double d = CI->getValue().signedRoundToDouble(); if (DestTy==Type::FloatTy) return ConstantFP::get(DestTy, APFloat((float)d)); - else + else if (DestTy==Type::DoubleTy) return ConstantFP::get(DestTy, APFloat(d)); + else + return 0; // FIXME do this for long double } return 0; case Instruction::ZExt: |