[SPIRV][NFC] Remove useless cast to Constant (#163935)

Author: jmmartinez

llvm/lib/Target/SPIRV/SPIRVEmitIntrinsics.cpp

@@ -1392,19 +1392,19 @@ void SPIRVEmitIntrinsics::preprocessCompositeConstants(IRBuilder<> &B) {
  Constant *AggrConst = nullptr;
  Type *ResTy = nullptr;
  if (auto *COp = dyn_cast<ConstantVector>(Op)) {
- AggrConst = cast<Constant>(COp);
+ AggrConst = COp;
  ResTy = COp->getType();
  } else if (auto *COp = dyn_cast<ConstantArray>(Op)) {
- AggrConst = cast<Constant>(COp);
+ AggrConst = COp;
  ResTy = B.getInt32Ty();
  } else if (auto *COp = dyn_cast<ConstantStruct>(Op)) {
- AggrConst = cast<Constant>(COp);
+ AggrConst = COp;
  ResTy = B.getInt32Ty();
  } else if (auto *COp = dyn_cast<ConstantDataArray>(Op)) {
- AggrConst = cast<Constant>(COp);
+ AggrConst = COp;
  ResTy = B.getInt32Ty();
  } else if (auto *COp = dyn_cast<ConstantAggregateZero>(Op)) {
- AggrConst = cast<Constant>(COp);
+ AggrConst = COp;
  ResTy = Op->getType()->isVectorTy() ? COp->getType() : B.getInt32Ty();
  }
  if (AggrConst) {