diff options
Diffstat (limited to 'lib/Target/X86/X86CodeEmitter.cpp')
| -rw-r--r-- | lib/Target/X86/X86CodeEmitter.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/Target/X86/X86CodeEmitter.cpp b/lib/Target/X86/X86CodeEmitter.cpp index 894726cf35..522891c7cd 100644 --- a/lib/Target/X86/X86CodeEmitter.cpp +++ b/lib/Target/X86/X86CodeEmitter.cpp @@ -540,6 +540,9 @@ void Emitter::emitInstruction(const MachineInstr &MI, const TargetInstrDesc *Desc) { unsigned Opcode = Desc->Opcode; + // Emit the lock opcode prefix as needed. + if (Desc->TSFlags & X86II::LOCK) MCE.emitByte(0xF0); + // Emit the repeat opcode prefix as needed. if ((Desc->TSFlags & X86II::Op0Mask) == X86II::REP) MCE.emitByte(0xF3); |