[RISCV] Simplify some code in unpackFromMemLoc. NFC

Use VA.getLocInfo() == CCValAssign::Indirect instead of checking
for scalable vector VT.

Author: topperc

llvm/lib/Target/RISCV/RISCVISelLowering.cpp

@@ -19084,7 +19084,7 @@ static SDValue unpackFromMemLoc(SelectionDAG &DAG, SDValue Chain,
   EVT LocVT = VA.getLocVT();
   EVT ValVT = VA.getValVT();
   EVT PtrVT = MVT::getIntegerVT(DAG.getDataLayout().getPointerSizeInBits(0));
-  if (ValVT.isScalableVector()) {
+  if (VA.getLocInfo() == CCValAssign::Indirect) {
     // When the value is a scalable vector, we save the pointer which points to
     // the scalable vector value in the stack. The ValVT will be the pointer
     // type, instead of the scalable vector type.
@@ -19095,14 +19095,13 @@ static SDValue unpackFromMemLoc(SelectionDAG &DAG, SDValue Chain,
   SDValue FIN = DAG.getFrameIndex(FI, PtrVT);
   SDValue Val;
 
-  ISD::LoadExtType ExtType;
+  ISD::LoadExtType ExtType = ISD::NON_EXTLOAD;
   switch (VA.getLocInfo()) {
   default:
     llvm_unreachable("Unexpected CCValAssign::LocInfo");
   case CCValAssign::Full:
   case CCValAssign::Indirect:
   case CCValAssign::BCvt:
-    ExtType = ISD::NON_EXTLOAD;
     break;
   }
   Val = DAG.getExtLoad(