Add missing check

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17706 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86ISelSimple.cpp b/lib/Target/X86/X86ISelSimple.cpp
index e5cf618fc10f37485e7b40a44bbf4d69eecff56a..37572aaefd4980c25b1a0a5a55f17a28ff14539b 100644 (file)
--- a/lib/Target/X86/X86ISelSimple.cpp
+++ b/lib/Target/X86/X86ISelSimple.cpp
@@ -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,