35 lines · cpp
1//===- BasicTargetTransformInfo.cpp - Basic target-independent TTI impl ---===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8/// \file9/// This file provides the implementation of a basic TargetTransformInfo pass10/// predicated on the target abstractions present in the target independent11/// code generator. It uses these (primarily TargetLowering) to model as much12/// of the TTI query interface as possible. It is included by most targets so13/// that they can specialize only a small subset of the query space.14///15//===----------------------------------------------------------------------===//16 17#include "llvm/CodeGen/BasicTTIImpl.h"18#include "llvm/CodeGen/TargetSubtargetInfo.h"19#include "llvm/IR/Function.h"20#include "llvm/Support/CommandLine.h"21#include "llvm/Target/TargetMachine.h"22 23using namespace llvm;24 25// This flag is used by the template base class for BasicTTIImpl, and here to26// provide a definition.27cl::opt<unsigned>28llvm::PartialUnrollingThreshold("partial-unrolling-threshold", cl::init(0),29 cl::desc("Threshold for partial unrolling"),30 cl::Hidden);31 32BasicTTIImpl::BasicTTIImpl(const TargetMachine *TM, const Function &F)33 : BaseT(TM, F.getDataLayout()), ST(TM->getSubtargetImpl(F)),34 TLI(ST->getTargetLowering()) {}35