[llvm] [NFC][X86] Fix Werror=extra error due to enum (PR #112812)

[Phoebe Wang via llvm-commits]

================
@@ -29986,7 +29986,7 @@ static SDValue LowerShift(SDValue Op, const X86Subtarget &Subtarget,
           MVT::getVectorVT(NarrowScalarVT, WideNumElts), dl, AmtWideElts);
       AmtWide = DAG.getZExtOrTrunc(AmtWide, dl, WideVT);
       // Perform the actual shift.
-      unsigned LogicalOpc = Opc == ISD::SRA ? ISD::SRL : Opc;
+      unsigned LogicalOpc = Opc == ISD::SRA ? (unsigned)ISD::SRL : Opc;
----------------
phoebewang wrote:

Why need `(unsigned)` here? If the `ISD::XXX` is not a unsigned value, I think we would have more warn/error when comparing with `Opc`.

https://github.com/llvm/llvm-project/pull/112812