1//===-- RISCVLegalizerInfo.h ------------------------------------*- C++ -*-===//
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 declares the targeting of the Machinelegalizer class for RISC-V.
10/// \todo This should be generated by TableGen.
11//===----------------------------------------------------------------------===//
12
13#ifndef LLVM_LIB_TARGET_RISCV_RISCVMACHINELEGALIZER_H
14#define LLVM_LIB_TARGET_RISCV_RISCVMACHINELEGALIZER_H
15
16#include "llvm/CodeGen/GlobalISel/LegalizerHelper.h"
17#include "llvm/CodeGen/GlobalISel/LegalizerInfo.h"
18#include "llvm/CodeGen/Register.h"
19
20namespace llvm {
21
22class GISelChangeObserver;
23class MachineIRBuilder;
24class RISCVSubtarget;
25
26class RISCVLegalizerInfo : public LegalizerInfo {
27 const RISCVSubtarget &STI;
28 const unsigned XLen;
29 const LLT sXLen;
30
31public:
32 RISCVLegalizerInfo(const RISCVSubtarget &ST);
33
34 bool legalizeCustom(LegalizerHelper &Helper, MachineInstr &MI,
35 LostDebugLocObserver &LocObserver) const override;
36
37 bool legalizeIntrinsic(LegalizerHelper &Helper,
38 MachineInstr &MI) const override;
39
40private:
41 bool shouldBeInConstantPool(const APInt &APImm, bool ShouldOptForSize) const;
42 bool legalizeShlAshrLshr(MachineInstr &MI, MachineIRBuilder &MIRBuilder,
43 GISelChangeObserver &Observer) const;
44
45 bool legalizeBRJT(MachineInstr &MI, MachineIRBuilder &MIRBuilder) const;
46 bool legalizeVAStart(MachineInstr &MI, MachineIRBuilder &MIRBuilder) const;
47 bool legalizeVScale(MachineInstr &MI, MachineIRBuilder &MIB) const;
48 bool legalizeExt(MachineInstr &MI, MachineIRBuilder &MIRBuilder) const;
49 bool legalizeSplatVector(MachineInstr &MI, MachineIRBuilder &MIB) const;
50 bool legalizeExtractSubvector(MachineInstr &MI, MachineIRBuilder &MIB) const;
51 bool legalizeInsertSubvector(MachineInstr &MI, LegalizerHelper &Helper,
52 MachineIRBuilder &MIB) const;
53 bool legalizeLoadStore(MachineInstr &MI, LegalizerHelper &Helper,
54 MachineIRBuilder &MIB) const;
55};
56} // end namespace llvm
57#endif
58