diff options
Diffstat (limited to 'llvm/lib/Target/X86/X86InstrInfo.cpp')
| -rw-r--r-- | llvm/lib/Target/X86/X86InstrInfo.cpp | 22 |
1 files changed, 5 insertions, 17 deletions
diff --git a/llvm/lib/Target/X86/X86InstrInfo.cpp b/llvm/lib/Target/X86/X86InstrInfo.cpp index 1d2cd39..5c23f91 100644 --- a/llvm/lib/Target/X86/X86InstrInfo.cpp +++ b/llvm/lib/Target/X86/X86InstrInfo.cpp @@ -10809,39 +10809,27 @@ void X86InstrInfo::buildClearRegister(Register Reg, MachineBasicBlock &MBB, if (!ST.hasSSE1()) return; - // PXOR is safe to use because it doesn't affect flags. - BuildMI(MBB, Iter, DL, get(X86::PXORrr), Reg) - .addReg(Reg, RegState::Undef) - .addReg(Reg, RegState::Undef); + BuildMI(MBB, Iter, DL, get(X86::V_SET0), Reg); } else if (X86::VR256RegClass.contains(Reg)) { // YMM# if (!ST.hasAVX()) return; - // VPXOR is safe to use because it doesn't affect flags. - BuildMI(MBB, Iter, DL, get(X86::VPXORrr), Reg) - .addReg(Reg, RegState::Undef) - .addReg(Reg, RegState::Undef); + BuildMI(MBB, Iter, DL, get(X86::AVX_SET0), Reg); } else if (X86::VR512RegClass.contains(Reg)) { // ZMM# if (!ST.hasAVX512()) return; - // VPXORY is safe to use because it doesn't affect flags. - BuildMI(MBB, Iter, DL, get(X86::VPXORYrr), Reg) - .addReg(Reg, RegState::Undef) - .addReg(Reg, RegState::Undef); + BuildMI(MBB, Iter, DL, get(X86::AVX512_512_SET0), Reg); } else if (X86::VK1RegClass.contains(Reg) || X86::VK2RegClass.contains(Reg) || X86::VK4RegClass.contains(Reg) || X86::VK8RegClass.contains(Reg) || X86::VK16RegClass.contains(Reg)) { if (!ST.hasVLX()) return; - // KXOR is safe to use because it doesn't affect flags. - unsigned Op = ST.hasBWI() ? X86::KXORQkk : X86::KXORWkk; - BuildMI(MBB, Iter, DL, get(Op), Reg) - .addReg(Reg, RegState::Undef) - .addReg(Reg, RegState::Undef); + unsigned Op = ST.hasBWI() ? X86::KSET0Q : X86::KSET0W; + BuildMI(MBB, Iter, DL, get(Op), Reg); } } |