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Make the kind of cost explicit throughout the cost model which, apart from making the cost clear, will allow the generic parts to calculate better costs. It will also allow some backends to approximate and correlate the different costs if they wish. Another benefit is that it will also help simplify the cost model around immediate and intrinsic costs, where we currently have multiple APIs. RFC thread: http://lists.llvm.org/pipermail/llvm-dev/2020-April/141263.html Differential Revision: https://reviews.llvm.org/D79002
54 lines
2.0 KiB
C++
54 lines
2.0 KiB
C++
//===- RISCVTargetTransformInfo.h - RISC-V specific TTI ---------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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/// \file
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/// This file defines a TargetTransformInfo::Concept conforming object specific
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/// to the RISC-V target machine. It uses the target's detailed information to
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/// provide more precise answers to certain TTI queries, while letting the
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/// target independent and default TTI implementations handle the rest.
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///
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_RISCV_RISCVTARGETTRANSFORMINFO_H
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#define LLVM_LIB_TARGET_RISCV_RISCVTARGETTRANSFORMINFO_H
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#include "RISCVSubtarget.h"
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#include "RISCVTargetMachine.h"
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#include "llvm/Analysis/TargetTransformInfo.h"
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#include "llvm/CodeGen/BasicTTIImpl.h"
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#include "llvm/IR/Function.h"
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namespace llvm {
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class RISCVTTIImpl : public BasicTTIImplBase<RISCVTTIImpl> {
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using BaseT = BasicTTIImplBase<RISCVTTIImpl>;
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using TTI = TargetTransformInfo;
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friend BaseT;
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const RISCVSubtarget *ST;
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const RISCVTargetLowering *TLI;
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const RISCVSubtarget *getST() const { return ST; }
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const RISCVTargetLowering *getTLI() const { return TLI; }
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public:
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explicit RISCVTTIImpl(const RISCVTargetMachine *TM, const Function &F)
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: BaseT(TM, F.getParent()->getDataLayout()), ST(TM->getSubtargetImpl(F)),
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TLI(ST->getTargetLowering()) {}
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int getIntImmCost(const APInt &Imm, Type *Ty, TTI::TargetCostKind CostKind);
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int getIntImmCostInst(unsigned Opcode, unsigned Idx, const APInt &Imm, Type *Ty,
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TTI::TargetCostKind CostKind);
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int getIntImmCostIntrin(Intrinsic::ID IID, unsigned Idx, const APInt &Imm,
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Type *Ty, TTI::TargetCostKind CostKind);
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};
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} // end namespace llvm
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#endif // LLVM_LIB_TARGET_RISCV_RISCVTARGETTRANSFORMINFO_H
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