[X86] Fix gcc warning about mix of enumeral and non-enumeral types. NFC

Author: topperc

llvm/lib/Target/X86/X86ISelLowering.cpp

@@ -3297,21 +3297,22 @@ unsigned X86TargetLowering::preferedOpcodeForCmpEqPiecesOfOperand(
       // If the current setup has imm64 mask, then inverse will have
       // at least imm32 mask (or be zext i32 -> i64).
       if (VT == MVT::i64)
-        return AndMask->getSignificantBits() > 32 ? ISD::SRL : ShiftOpc;
+        return AndMask->getSignificantBits() > 32 ? (unsigned)ISD::SRL
+                                                  : ShiftOpc;
 
       // We can only benefit if req at least 7-bit for the mask. We
       // don't want to replace shl of 1,2,3 as they can be implemented
       // with lea/add.
-      return ShiftOrRotateAmt.uge(7) ? ISD::SRL : ShiftOpc;
+      return ShiftOrRotateAmt.uge(7) ? (unsigned)ISD::SRL : ShiftOpc;
     }
 
     if (VT == MVT::i64)
       // Keep exactly 32-bit imm64, this is zext i32 -> i64 which is
       // extremely efficient.
-      return AndMask->getSignificantBits() > 33 ? ISD::SHL : ShiftOpc;
+      return AndMask->getSignificantBits() > 33 ? (unsigned)ISD::SHL : ShiftOpc;
 
     // Keep small shifts as shl so we can generate add/lea.
-    return ShiftOrRotateAmt.ult(7) ? ISD::SHL : ShiftOpc;
+    return ShiftOrRotateAmt.ult(7) ? (unsigned)ISD::SHL : ShiftOpc;
   }
 
   // We prefer rotate for vectors of if we won't get a zext mask with SRL