diff options
Diffstat (limited to 'llvm/lib/Target/X86/X86InstrInfo.cpp')
| -rw-r--r-- | llvm/lib/Target/X86/X86InstrInfo.cpp | 26 |
1 files changed, 17 insertions, 9 deletions
diff --git a/llvm/lib/Target/X86/X86InstrInfo.cpp b/llvm/lib/Target/X86/X86InstrInfo.cpp index acc790c68c8..f17d8812a8a 100644 --- a/llvm/lib/Target/X86/X86InstrInfo.cpp +++ b/llvm/lib/Target/X86/X86InstrInfo.cpp @@ -710,11 +710,10 @@ bool X86InstrInfo::classifyLEAReg(MachineInstr &MI, const MachineOperand &Src, MachineInstr *X86InstrInfo::convertToThreeAddressWithLEA( unsigned MIOpc, MachineFunction::iterator &MFI, MachineInstr &MI, - LiveVariables *LV) const { + LiveVariables *LV, bool Is8BitOp) const { // We handle 8-bit adds and various 16-bit opcodes in the switch below. - bool Is16BitOp = !(MIOpc == X86::ADD8rr || MIOpc == X86::ADD8ri); MachineRegisterInfo &RegInfo = MFI->getParent()->getRegInfo(); - assert((!Is16BitOp || RegInfo.getTargetRegisterInfo()->getRegSizeInBits( + assert((Is8BitOp || RegInfo.getTargetRegisterInfo()->getRegSizeInBits( *RegInfo.getRegClass(MI.getOperand(0).getReg())) == 16) && "Unexpected type for LEA transform"); @@ -744,7 +743,7 @@ MachineInstr *X86InstrInfo::convertToThreeAddressWithLEA( unsigned Src = MI.getOperand(1).getReg(); bool IsDead = MI.getOperand(0).isDead(); bool IsKill = MI.getOperand(1).isKill(); - unsigned SubReg = Is16BitOp ? X86::sub_16bit : X86::sub_8bit; + unsigned SubReg = Is8BitOp ? X86::sub_8bit : X86::sub_16bit; assert(!MI.getOperand(1).isUndef() && "Undef op doesn't need optimization"); BuildMI(*MFI, MBBI, MI.getDebugLoc(), get(X86::IMPLICIT_DEF), InRegLEA); MachineInstr *InsMI = @@ -769,6 +768,7 @@ MachineInstr *X86InstrInfo::convertToThreeAddressWithLEA( addRegOffset(MIB, InRegLEA, true, -1); break; case X86::ADD8ri: + case X86::ADD8ri_DB: case X86::ADD16ri: case X86::ADD16ri8: case X86::ADD16ri_DB: @@ -776,6 +776,7 @@ MachineInstr *X86InstrInfo::convertToThreeAddressWithLEA( addRegOffset(MIB, InRegLEA, true, MI.getOperand(2).getImm()); break; case X86::ADD8rr: + case X86::ADD8rr_DB: case X86::ADD16rr: case X86::ADD16rr_DB: { unsigned Src2 = MI.getOperand(2).getReg(); @@ -862,6 +863,7 @@ X86InstrInfo::convertToThreeAddress(MachineFunction::iterator &MFI, MachineInstr *NewMI = nullptr; bool Is64Bit = Subtarget.is64Bit(); + bool Is8BitOp = false; unsigned MIOpc = MI.getOpcode(); switch (MIOpc) { default: return nullptr; @@ -919,7 +921,7 @@ X86InstrInfo::convertToThreeAddress(MachineFunction::iterator &MFI, unsigned ShAmt = getTruncatedShiftCount(MI, 2); if (!isTruncatedShiftCountForLEA(ShAmt)) return nullptr; - return convertToThreeAddressWithLEA(MIOpc, MFI, MI, LV); + return convertToThreeAddressWithLEA(MIOpc, MFI, MI, LV, Is8BitOp); } case X86::INC64r: case X86::INC32r: { @@ -944,7 +946,7 @@ X86InstrInfo::convertToThreeAddress(MachineFunction::iterator &MFI, break; } case X86::INC16r: - return convertToThreeAddressWithLEA(MIOpc, MFI, MI, LV); + return convertToThreeAddressWithLEA(MIOpc, MFI, MI, LV, Is8BitOp); case X86::DEC64r: case X86::DEC32r: { assert(MI.getNumOperands() >= 2 && "Unknown dec instruction!"); @@ -969,7 +971,7 @@ X86InstrInfo::convertToThreeAddress(MachineFunction::iterator &MFI, break; } case X86::DEC16r: - return convertToThreeAddressWithLEA(MIOpc, MFI, MI, LV); + return convertToThreeAddressWithLEA(MIOpc, MFI, MI, LV, Is8BitOp); case X86::ADD64rr: case X86::ADD64rr_DB: case X86::ADD32rr: @@ -1008,9 +1010,12 @@ X86InstrInfo::convertToThreeAddress(MachineFunction::iterator &MFI, break; } case X86::ADD8rr: + case X86::ADD8rr_DB: + Is8BitOp = true; + LLVM_FALLTHROUGH; case X86::ADD16rr: case X86::ADD16rr_DB: - return convertToThreeAddressWithLEA(MIOpc, MFI, MI, LV); + return convertToThreeAddressWithLEA(MIOpc, MFI, MI, LV, Is8BitOp); case X86::ADD64ri32: case X86::ADD64ri8: case X86::ADD64ri32_DB: @@ -1044,11 +1049,14 @@ X86InstrInfo::convertToThreeAddress(MachineFunction::iterator &MFI, break; } case X86::ADD8ri: + case X86::ADD8ri_DB: + Is8BitOp = true; + LLVM_FALLTHROUGH; case X86::ADD16ri: case X86::ADD16ri8: case X86::ADD16ri_DB: case X86::ADD16ri8_DB: - return convertToThreeAddressWithLEA(MIOpc, MFI, MI, LV); + return convertToThreeAddressWithLEA(MIOpc, MFI, MI, LV, Is8BitOp); case X86::VMOVDQU8Z128rmk: case X86::VMOVDQU8Z256rmk: case X86::VMOVDQU8Zrmk: |
