fix

Author: arsenm

llvm/lib/Target/X86/X86InstrInfo.cpp

@@ -1172,6 +1172,8 @@ bool X86InstrInfo::classifyLEAReg(MachineInstr &MI, const MachineOperand &Src,
   unsigned SubReg = Src.getSubReg();
   isKill = MI.killsRegister(SrcReg, /*TRI=*/nullptr);
 
+  NewSrcSubReg = X86::NoSubRegister;
+
   // For both LEA64 and LEA32 the register already has essentially the right
   // type (32-bit or 64-bit) we may just need to forbid SP.
   if (Opc != X86::LEA64_32r) {
@@ -1199,6 +1201,7 @@ bool X86InstrInfo::classifyLEAReg(MachineInstr &MI, const MachineOperand &Src,
     // Virtual register of the wrong class, we have to create a temporary 64-bit
     // vreg to feed into the LEA.
     NewSrc = MF.getRegInfo().createVirtualRegister(RC);
+    NewSrcSubReg = X86::NoSubRegister;
     MachineInstr *Copy =
         BuildMI(*MI.getParent(), MI, MI.getDebugLoc(), get(TargetOpcode::COPY))
             .addReg(NewSrc, RegState::Define | RegState::Undef, X86::sub_32bit)