1// WebAssemblyRegisterInfo.h - WebAssembly Register Information Impl -*- 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///
9/// \file
10/// This file contains the WebAssembly implementation of the
11/// WebAssemblyRegisterInfo class.
12///
13//===----------------------------------------------------------------------===//
14
15#ifndef LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYREGISTERINFO_H
16#define LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYREGISTERINFO_H
17
18#define GET_REGINFO_HEADER
19#include "WebAssemblyGenRegisterInfo.inc"
20
21namespace llvm {
22
23class MachineFunction;
24class RegScavenger;
25class MCRegisterClass;
26using TargetRegisterClass = MCRegisterClass;
27class Triple;
28
29class WebAssemblyRegisterInfo final : public WebAssemblyGenRegisterInfo {
30 const Triple &TT;
31
32public:
33 explicit WebAssemblyRegisterInfo(const Triple &TT);
34
35 // Code Generation virtual methods.
36 const MCPhysReg *getCalleeSavedRegs(const MachineFunction *MF) const override;
37 BitVector getReservedRegs(const MachineFunction &MF) const override;
38 bool eliminateFrameIndex(MachineBasicBlock::iterator MI, int SPAdj,
39 unsigned FIOperandNum,
40 RegScavenger *RS = nullptr) const override;
41
42 // Debug information queries.
43 Register getFrameRegister(const MachineFunction &MF) const override;
44
45 const TargetRegisterClass *
46 getPointerRegClass(unsigned Kind = 0) const override;
47 // This does not apply to wasm.
48 const uint32_t *getNoPreservedMask() const override { return nullptr; }
49
50 const TargetRegisterClass *getConstrainedRegClassForOperand(
51 const MachineOperand &MO, const MachineRegisterInfo &MRI) const override;
52};
53
54} // end namespace llvm
55
56#endif
57