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/LegalizerInfo.h"
17 
18 namespace llvm {
19 
20 class GISelChangeObserver;
21 class MachineIRBuilder;
22 class RISCVSubtarget;
23 
24 class RISCVLegalizerInfo : public LegalizerInfo {
25   const RISCVSubtarget &STI;
26   const unsigned XLen;
27   const LLT sXLen;
28 
29 public:
30   RISCVLegalizerInfo(const RISCVSubtarget &ST);
31 
32   bool legalizeCustom(LegalizerHelper &Helper, MachineInstr &MI,
33                       LostDebugLocObserver &LocObserver) const override;
34 
35   bool legalizeIntrinsic(LegalizerHelper &Helper,
36                          MachineInstr &MI) const override;
37 
38 private:
39   bool legalizeShlAshrLshr(MachineInstr &MI, MachineIRBuilder &MIRBuilder,
40                            GISelChangeObserver &Observer) const;
41 
42   bool legalizeVAStart(MachineInstr &MI, MachineIRBuilder &MIRBuilder) const;
43 };
44 } // end namespace llvm
45 #endif
46