LLVM  9.0.0svn
BasicTargetTransformInfo.cpp
Go to the documentation of this file.
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-exception
6 //
7 //===----------------------------------------------------------------------===//
8 /// \file
9 /// This file provides the implementation of a basic TargetTransformInfo pass
10 /// predicated on the target abstractions present in the target independent
11 /// code generator. It uses these (primarily TargetLowering) to model as much
12 /// of the TTI query interface as possible. It is included by most targets so
13 /// that they can specialize only a small subset of the query space.
14 ///
15 //===----------------------------------------------------------------------===//
16 
19 #include "llvm/IR/Function.h"
22 
23 using namespace llvm;
24 
25 // This flag is used by the template base class for BasicTTIImpl, and here to
26 // provide a definition.
28 llvm::PartialUnrollingThreshold("partial-unrolling-threshold", cl::init(0),
29  cl::desc("Threshold for partial unrolling"),
30  cl::Hidden);
31 
33  : BaseT(TM, F.getParent()->getDataLayout()), ST(TM->getSubtargetImpl(F)),
34  TLI(ST->getTargetLowering()) {}
This class represents lattice values for constants.
Definition: AllocatorList.h:23
F(f)
initializer< Ty > init(const Ty &Val)
Definition: CommandLine.h:427
BasicTTIImpl(const TargetMachine *TM, const Function &F)
This file provides a helper that implements much of the TTI interface in terms of the target-independ...
cl::opt< unsigned > PartialUnrollingThreshold
static const Function * getParent(const Value *V)
Primary interface to the complete machine description for the target machine.
Definition: TargetMachine.h:65