Use auto *

Author: tclin914

llvm/lib/Target/RISCV/RISCVISelLowering.cpp

@@ -20186,10 +20186,9 @@ SDValue RISCVTargetLowering::LowerCall(CallLoweringInfo &CLI,
   // TargetGlobalAddress/TargetExternalSymbol node so that legalize won't
   // split it and then direct call can be matched by PseudoCALL.
   if (getTargetMachine().getCodeModel() == CodeModel::Large) {
-    if (GlobalAddressSDNode *S = dyn_cast<GlobalAddressSDNode>(Callee)) {
+    if (auto *S = dyn_cast<GlobalAddressSDNode>(Callee)) {
       Callee = getLargeGlobalAddress(S, DL, PtrVT, DAG);
-    } else if (ExternalSymbolSDNode *S =
-                   dyn_cast<ExternalSymbolSDNode>(Callee)) {
+    } else if (auto *S = dyn_cast<ExternalSymbolSDNode>(Callee)) {
       Callee = getLargeExternalSymbol(S, DL, PtrVT, DAG);
     }
   } else if (GlobalAddressSDNode *S = dyn_cast<GlobalAddressSDNode>(Callee)) {