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Copy segment register when optimizing to MOV8ao8/MOV16ao16/MOV32ao32. 

llvm-svn: 199365
This commit is contained in:
Craig Topper 2014-01-16 07:57:45 +00:00
parent 35da3d190a
commit a9d2c67cc2
1 changed files with 2 additions and 1 deletions
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3
llvm/lib/Target/X86/X86MCInstLower.cpp
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@ -323,15 +323,16 @@ static void SimplifyShortMoveForm(X86AsmPrinter &Printer, MCInst &Inst,
if (Absolute &&
(Inst.getOperand(AddrBase + 0).getReg() != 0 ||
Inst.getOperand(AddrBase + 2).getReg() != 0 ||
Inst.getOperand(AddrBase + 4).getReg() != 0 ||
Inst.getOperand(AddrBase + 1).getImm() != 1))
return;
// If so, rewrite the instruction.
MCOperand Saved = Inst.getOperand(AddrOp);
MCOperand Seg = Inst.getOperand(AddrBase + 4);
Inst = MCInst();
Inst.setOpcode(Opcode);
Inst.addOperand(Saved);
Inst.addOperand(Seg);
}
static unsigned getRetOpcode(const X86Subtarget &Subtarget)