mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-19 19:12:56 +02:00
75a022ea2b
Summary: LLVM Allows Targets to provide information that guides optimisations made to LLVM IR. This is done with callbacks on a TargetTransformInfo object. This patch adds a TargetTransformInfo class for RISC-V. This will allow us to implement RISC-V specific callbacks as they become necessary. This commit also adds the getIntImmCost callbacks, and tests them with a simple constant hoisting test. Our immediate costs are on the conservative side, for the moment, but we prevent hoisting in most circumstances anyway. Previous review was on D63007 Reviewers: asb, luismarques Reviewed By: asb Subscribers: ributzka, MaskRay, llvm-commits, Jim, benna, psnobl, jocewei, PkmX, rkruppe, the_o, brucehoult, MartinMosbeck, rogfer01, edward-jones, zzheng, jrtc27, shiva0217, kito-cheng, niosHD, sabuasal, apazos, simoncook, johnrusso, rbar, hiraditya, mgorny Tags: #llvm Differential Revision: https://reviews.llvm.org/D63433 llvm-svn: 364046
52 lines
1.9 KiB
C++
52 lines
1.9 KiB
C++
//===- RISCVTargetTransformInfo.h - RISC-V specific TTI ---------*- C++ -*-===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
/// \file
|
|
/// This file defines a TargetTransformInfo::Concept conforming object specific
|
|
/// to the RISC-V target machine. It uses the target's detailed information to
|
|
/// provide more precise answers to certain TTI queries, while letting the
|
|
/// target independent and default TTI implementations handle the rest.
|
|
///
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_LIB_TARGET_RISCV_RISCVTARGETTRANSFORMINFO_H
|
|
#define LLVM_LIB_TARGET_RISCV_RISCVTARGETTRANSFORMINFO_H
|
|
|
|
#include "RISCVSubtarget.h"
|
|
#include "RISCVTargetMachine.h"
|
|
#include "llvm/Analysis/TargetTransformInfo.h"
|
|
#include "llvm/CodeGen/BasicTTIImpl.h"
|
|
#include "llvm/IR/Function.h"
|
|
|
|
namespace llvm {
|
|
|
|
class RISCVTTIImpl : public BasicTTIImplBase<RISCVTTIImpl> {
|
|
using BaseT = BasicTTIImplBase<RISCVTTIImpl>;
|
|
using TTI = TargetTransformInfo;
|
|
|
|
friend BaseT;
|
|
|
|
const RISCVSubtarget *ST;
|
|
const RISCVTargetLowering *TLI;
|
|
|
|
const RISCVSubtarget *getST() const { return ST; }
|
|
const RISCVTargetLowering *getTLI() const { return TLI; }
|
|
|
|
public:
|
|
explicit RISCVTTIImpl(const RISCVTargetMachine *TM, const Function &F)
|
|
: BaseT(TM, F.getParent()->getDataLayout()), ST(TM->getSubtargetImpl(F)),
|
|
TLI(ST->getTargetLowering()) {}
|
|
|
|
int getIntImmCost(const APInt &Imm, Type *Ty);
|
|
int getIntImmCost(unsigned Opcode, unsigned Idx, const APInt &Imm, Type *Ty);
|
|
int getIntImmCost(Intrinsic::ID IID, unsigned Idx, const APInt &Imm,
|
|
Type *Ty);
|
|
};
|
|
|
|
} // end namespace llvm
|
|
|
|
#endif // LLVM_LIB_TARGET_RISCV_RISCVTARGETTRANSFORMINFO_H
|