[Vectorize] Remove unnecessary casts (NFC) (llvm#148116)

&Ingredient is already of Instruction *.

Author: kazutakahirata

llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp

@@ -3055,8 +3055,7 @@ void VPPredInstPHIRecipe::print(raw_ostream &O, const Twine &Indent,
 InstructionCost VPWidenMemoryRecipe::computeCost(ElementCount VF,
                                                  VPCostContext &Ctx) const {
   Type *Ty = toVectorTy(getLoadStoreType(&Ingredient), VF);
-  const Align Alignment =
-      getLoadStoreAlignment(const_cast<Instruction *>(&Ingredient));
+  const Align Alignment = getLoadStoreAlignment(&Ingredient);
   unsigned AS = cast<PointerType>(Ctx.Types.inferScalarType(getAddr()))
                     ->getAddressSpace();
   unsigned Opcode = isa<VPWidenLoadRecipe, VPWidenLoadEVLRecipe>(this)
@@ -3196,10 +3195,8 @@ InstructionCost VPWidenLoadEVLRecipe::computeCost(ElementCount VF,
   // TODO: Using getMemoryOpCost() instead of getMaskedMemoryOpCost when we
   // don't need to compare to the legacy cost model.
   Type *Ty = toVectorTy(getLoadStoreType(&Ingredient), VF);
-  const Align Alignment =
-      getLoadStoreAlignment(const_cast<Instruction *>(&Ingredient));
-  unsigned AS =
-      getLoadStoreAddressSpace(const_cast<Instruction *>(&Ingredient));
+  const Align Alignment = getLoadStoreAlignment(&Ingredient);
+  unsigned AS = getLoadStoreAddressSpace(&Ingredient);
   InstructionCost Cost = Ctx.TTI.getMaskedMemoryOpCost(
       Instruction::Load, Ty, Alignment, AS, Ctx.CostKind);
   if (!Reverse)
@@ -3309,10 +3306,8 @@ InstructionCost VPWidenStoreEVLRecipe::computeCost(ElementCount VF,
   // TODO: Using getMemoryOpCost() instead of getMaskedMemoryOpCost when we
   // don't need to compare to the legacy cost model.
   Type *Ty = toVectorTy(getLoadStoreType(&Ingredient), VF);
-  const Align Alignment =
-      getLoadStoreAlignment(const_cast<Instruction *>(&Ingredient));
-  unsigned AS =
-      getLoadStoreAddressSpace(const_cast<Instruction *>(&Ingredient));
+  const Align Alignment = getLoadStoreAlignment(&Ingredient);
+  unsigned AS = getLoadStoreAddressSpace(&Ingredient);
   InstructionCost Cost = Ctx.TTI.getMaskedMemoryOpCost(
       Instruction::Store, Ty, Alignment, AS, Ctx.CostKind);
   if (!Reverse)