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Update size of inst correctly with segment override. 

llvm-svn: 57414
This commit is contained in:
Anton Korobeynikov 2008-10-12 10:30:11 +00:00
parent de9812de43
commit 46a9c01fff
2 changed files with 12 additions and 0 deletions
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2
llvm/lib/Target/X86/X86CodeEmitter.cpp
View File

@ -420,6 +420,8 @@ void Emitter::emitInstruction(const MachineInstr &MI,
case X86II::GS:
MCE.emitByte(0x65);
break;
default: assert(0 && "Invalid segment!");
case 0: break; // No segment override!
}
// Emit the repeat opcode prefix as needed.

10
llvm/lib/Target/X86/X86InstrInfo.cpp
View File

@ -2668,6 +2668,16 @@ static unsigned GetInstSizeWithDesc(const MachineInstr &MI,
// Emit the lock opcode prefix as needed.
if (Desc->TSFlags & X86II::LOCK) ++FinalSize;
// Emit segment overrid opcode prefix as needed.
switch (Desc->TSFlags & X86II::SegOvrMask) {
case X86II::FS:
case X86II::GS:
++FinalSize;
break;
default: assert(0 && "Invalid segment!");
case 0: break; // No segment override!
}
// Emit the repeat opcode prefix as needed.
if ((Desc->TSFlags & X86II::Op0Mask) == X86II::REP) ++FinalSize;