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Add missing check

llvm-svn: 17706
This commit is contained in:
Chris Lattner 2004-11-13 20:04:38 +00:00
parent d1381380ae
commit c531e090db

View File

@ -2925,7 +2925,7 @@ void X86ISel::emitShiftOperation(MachineBasicBlock *MBB,
//
if (ConstantUInt *CUI = dyn_cast<ConstantUInt>(ShiftAmount)) {
unsigned Amount = CUI->getValue();
if (Amount == 1) { // X << 1 == X+X
if (Amount == 1 && isLeftShift) { // X << 1 == X+X
BuildMI(*MBB, IP, X86::ADD32rr, 2,
DestReg).addReg(SrcReg).addReg(SrcReg);
BuildMI(*MBB, IP, X86::ADC32rr, 2,