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tidy up; NFC 

llvm-svn: 256506
This commit is contained in:
Sanjay Patel 2015-12-28 18:18:22 +00:00
parent 73fc84761f
commit cc4c71b4fb
1 changed files with 7 additions and 6 deletions
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13
llvm/lib/Target/X86/X86InstrInfo.cpp
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@ -5913,13 +5913,14 @@ breakPartialRegDependency(MachineBasicBlock::iterator MI, unsigned OpNum,
// If MI kills this register, the false dependence is already broken.
if (MI->killsRegister(Reg, TRI))
return;
if (X86::VR128RegClass.contains(Reg)) {
// These instructions are all floating point domain, so xorps is the best
// choice.
bool HasAVX = Subtarget.hasAVX();
unsigned Opc = HasAVX ? X86::VXORPSrr : X86::XORPSrr;
unsigned Opc = Subtarget.hasAVX() ? X86::VXORPSrr : X86::XORPSrr;
BuildMI(*MI->getParent(), MI, MI->getDebugLoc(), get(Opc), Reg)
.addReg(Reg, RegState::Undef).addReg(Reg, RegState::Undef);
MI->addRegisterKilled(Reg, TRI, true);
} else if (X86::VR256RegClass.contains(Reg)) {
// Use vxorps to clear the full ymm register.
// It wants to read and write the xmm sub-register.
@ -5927,16 +5928,16 @@ breakPartialRegDependency(MachineBasicBlock::iterator MI, unsigned OpNum,
BuildMI(*MI->getParent(), MI, MI->getDebugLoc(), get(X86::VXORPSrr), XReg)
.addReg(XReg, RegState::Undef).addReg(XReg, RegState::Undef)
.addReg(Reg, RegState::ImplicitDefine);
} else
return;
MI->addRegisterKilled(Reg, TRI, true);
MI->addRegisterKilled(Reg, TRI, true);
}
}
MachineInstr *X86InstrInfo::foldMemoryOperandImpl(
MachineFunction &MF, MachineInstr *MI, ArrayRef<unsigned> Ops,
MachineBasicBlock::iterator InsertPt, int FrameIndex) const {
// Check switch flag
if (NoFusing) return nullptr;
if (NoFusing)
return nullptr;
// Unless optimizing for size, don't fold to avoid partial
// register update stalls