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 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 23 using namespace llvm; 24 25 // This flag is used by the template base class for BasicTTIImpl, and here to 26 // provide a definition. 27 cl::opt<unsigned> 28 llvm::PartialUnrollingThreshold("partial-unrolling-threshold", cl::init(0), 29 cl::desc("Threshold for partial unrolling"), 30 cl::Hidden); 31 32 BasicTTIImpl::BasicTTIImpl(const TargetMachine *TM, const Function &F) 33 : BaseT(TM, F.getParent()->getDataLayout()), ST(TM->getSubtargetImpl(F)), 34 TLI(ST->getTargetLowering()) {} 35