[RISCV] Rename function for consistency

Author: pfusik

llvm/lib/Target/RISCV/RISCVISelLowering.cpp

@@ -17341,8 +17341,9 @@ static SDValue combineScalarCTPOPToVCPOP(SDNode *N, SelectionDAG &DAG,
   return DAG.getZExtOrTrunc(Pop, DL, VT);
 }
 
-static SDValue combineSHL(SDNode *N, TargetLowering::DAGCombinerInfo &DCI,
-                          const RISCVSubtarget &Subtarget) {
+static SDValue performSHLCombine(SDNode *N,
+                                 TargetLowering::DAGCombinerInfo &DCI,
+                                 const RISCVSubtarget &Subtarget) {
   // (shl (zext x), y) -> (vwsll   x, y)
   if (SDValue V = combineOp_VLToVWOp_VL(N, DCI, Subtarget))
     return V;
@@ -18049,7 +18050,7 @@ SDValue RISCVTargetLowering::PerformDAGCombine(SDNode *N,
     break;
   }
   case RISCVISD::SHL_VL:
-    if (SDValue V = combineSHL(N, DCI, Subtarget))
+    if (SDValue V = performSHLCombine(N, DCI, Subtarget))
       return V;
     [[fallthrough]];
   case RISCVISD::SRA_VL:
@@ -18074,7 +18075,7 @@ SDValue RISCVTargetLowering::PerformDAGCombine(SDNode *N,
   case ISD::SRL:
   case ISD::SHL: {
     if (N->getOpcode() == ISD::SHL) {
-      if (SDValue V = combineSHL(N, DCI, Subtarget))
+      if (SDValue V = performSHLCombine(N, DCI, Subtarget))
         return V;
     }
     SDValue ShAmt = N->getOperand(1);