1//===- BasicTargetTransformInfo.cpp - Basic target-independent TTI impl ---===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9/// \file
10/// This file provides the implementation of a basic TargetTransformInfo pass
11/// predicated on the target abstractions present in the target independent
12/// code generator. It uses these (primarily TargetLowering) to model as much
13/// of the TTI query interface as possible. It is included by most targets so
14/// that they can specialize only a small subset of the query space.
15///
16//===----------------------------------------------------------------------===//
17
18#include "llvm/CodeGen/BasicTTIImpl.h"
19#include "llvm/Analysis/LoopInfo.h"
20#include "llvm/Analysis/TargetTransformInfo.h"
21#include "llvm/Analysis/TargetTransformInfoImpl.h"
22#include "llvm/CodeGen/Passes.h"
23#include "llvm/Support/CommandLine.h"
24#include <utility>
25using namespace llvm;
26
27#define DEBUG_TYPE "basictti"
28
29// This flag is used by the template base class for BasicTTIImpl, and here to
30// provide a definition.
31cl::opt<unsigned>
32    llvm::PartialUnrollingThreshold("partial-unrolling-threshold", cl::init(0),
33                                    cl::desc("Threshold for partial unrolling"),
34                                    cl::Hidden);
35
36BasicTTIImpl::BasicTTIImpl(const TargetMachine *TM, const Function &F)
37    : BaseT(TM, F.getParent()->getDataLayout()), ST(TM->getSubtargetImpl(F)),
38      TLI(ST->getTargetLowering()) {}
39