diff options
Diffstat (limited to 'lib/Target/X86/X86TargetTransformInfo.cpp')
| -rw-r--r-- | lib/Target/X86/X86TargetTransformInfo.cpp | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/lib/Target/X86/X86TargetTransformInfo.cpp b/lib/Target/X86/X86TargetTransformInfo.cpp index bae2ef80c365..865462622627 100644 --- a/lib/Target/X86/X86TargetTransformInfo.cpp +++ b/lib/Target/X86/X86TargetTransformInfo.cpp @@ -2274,8 +2274,8 @@ int X86TTIImpl::getIntImmCost(const APInt &Imm, Type *Ty) { // Sign-extend all constants to a multiple of 64-bit. APInt ImmVal = Imm; - if (BitSize & 0x3f) - ImmVal = Imm.sext((BitSize + 63) & ~0x3fU); + if (BitSize % 64 != 0) + ImmVal = Imm.sext(alignTo(BitSize, 64)); // Split the constant into 64-bit chunks and calculate the cost for each // chunk. @@ -2332,9 +2332,15 @@ int X86TTIImpl::getIntImmCost(unsigned Opcode, unsigned Idx, const APInt &Imm, // immediates here as the normal path expects bit 31 to be sign extended. if (Idx == 1 && Imm.getBitWidth() == 64 && isUInt<32>(Imm.getZExtValue())) return TTI::TCC_Free; - LLVM_FALLTHROUGH; + ImmIdx = 1; + break; case Instruction::Add: case Instruction::Sub: + // For add/sub, we can use the opposite instruction for INT32_MIN. + if (Idx == 1 && Imm.getBitWidth() == 64 && Imm.getZExtValue() == 0x80000000) + return TTI::TCC_Free; + ImmIdx = 1; + break; case Instruction::Mul: case Instruction::UDiv: case Instruction::SDiv: @@ -2366,7 +2372,7 @@ int X86TTIImpl::getIntImmCost(unsigned Opcode, unsigned Idx, const APInt &Imm, } if (Idx == ImmIdx) { - int NumConstants = (BitSize + 63) / 64; + int NumConstants = divideCeil(BitSize, 64); int Cost = X86TTIImpl::getIntImmCost(Imm, Ty); return (Cost <= NumConstants * TTI::TCC_Basic) ? static_cast<int>(TTI::TCC_Free) |