[LLVM] Remove redundant function CreateBufferVecPtr (apache#5982)

The functions CreateBufferPtr and CreateBufferVecPtr do the exact
same thing, so there is no need for both of them to exist. The
latter is only used in place, which further suggests that the
distinction is unnecessary.

src/target/llvm/codegen_llvm.cc

@@ -625,19 +625,6 @@ llvm::Value* CodeGenLLVM::GetConstString(const std::string& str) {
 }
 
 llvm::Value* CodeGenLLVM::CreateBufferPtr(DataType t, llvm::Value* buffer, llvm::Value* index) {
-  CHECK_EQ(t.lanes(), 1);
-  llvm::PointerType* btype = llvm::dyn_cast<llvm::PointerType>(buffer->getType());
-  CHECK(btype != nullptr);
-  llvm::PointerType* ptype = DTypeToLLVMType(t)->getPointerTo(btype->getAddressSpace());
-  if (btype != ptype) {
-    buffer = builder_->CreatePointerCast(buffer, ptype);
-  }
-
-  return builder_->CreateInBoundsGEP(buffer, index);
-}
-
-llvm::Value* CodeGenLLVM::CreateBufferVecPtr(DataType t, llvm::Value* buffer, llvm::Value* index) {
-  CHECK_GT(t.lanes(), 1);
   llvm::PointerType* btype = llvm::dyn_cast<llvm::PointerType>(buffer->getType());
   CHECK(btype != nullptr);
   llvm::PointerType* ptype = DTypeToLLVMType(t)->getPointerTo(btype->getAddressSpace());
@@ -792,7 +779,7 @@ llvm::Value* CodeGenLLVM::CreateIntrinsic(const CallNode* op) {
       addrspace = llvm::dyn_cast<llvm::PointerType>(ptr->getType())->getAddressSpace();
     } else {
       PrimExpr index = r->base / make_const(DataType::Int(32), r->lanes);
-      ptr = CreateBufferVecPtr(l->dtype, MakeValue(l->buffer_var), MakeValue(index));
+      ptr = CreateBufferPtr(l->dtype, MakeValue(l->buffer_var), MakeValue(index));
       addrspace = llvm::dyn_cast<llvm::PointerType>(ptr->getType())->getAddressSpace();
     }
     return builder_->CreatePointerCast(ptr, t_char_->getPointerTo(addrspace));

src/target/llvm/codegen_llvm.h

@@ -264,7 +264,6 @@ class CodeGenLLVM : public ExprFunctor<llvm::Value*(const PrimExpr&)>,
   llvm::Value* CreateMul(DataType t, llvm::Value* a, llvm::Value* b);
   llvm::Value* CreateBroadcast(llvm::Value* value, int lanes);
   llvm::Value* CreateBufferPtr(DataType t, llvm::Value* buffer, llvm::Value* index);
-  llvm::Value* CreateBufferVecPtr(DataType t, llvm::Value* buffer, llvm::Value* index);
   // Vector concatenation.
   llvm::Value* CreateVecSlice(llvm::Value* vec, int begin, int extent);
   llvm::Value* CreateVecFlip(llvm::Value* vec);