WebAssemblyRegisterInfo.h

Go to the documentation of this file.

// WebAssemblyRegisterInfo.h - WebAssembly Register Information Impl -*- 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 contains the WebAssembly implementation of the
/// WebAssemblyRegisterInfo class.
///
//===----------------------------------------------------------------------===//
 
#ifndef LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYREGISTERINFO_H
#define LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYREGISTERINFO_H
 
#define GET_REGINFO_HEADER
#include "WebAssemblyGenRegisterInfo.inc"
 
namespace llvm {
 
class MachineFunction;
class RegScavenger;
class MCRegisterClass;
using TargetRegisterClass = MCRegisterClass;
class Triple;
 
class WebAssemblyRegisterInfo final : public WebAssemblyGenRegisterInfo {
  const Triple &TT;
 
public:
  explicit WebAssemblyRegisterInfo(const Triple &TT);
 
  // Code Generation virtual methods.
  const MCPhysReg *getCalleeSavedRegs(const MachineFunction *MF) const override;
  BitVector getReservedRegs(const MachineFunction &MF) const override;
  bool eliminateFrameIndex(MachineBasicBlock::iterator MI, int SPAdj,
                           unsigned FIOperandNum,
                           RegScavenger *RS = nullptr) const override;
 
  // Debug information queries.
  Register getFrameRegister(const MachineFunction &MF) const override;
 
  const TargetRegisterClass *
  getPointerRegClass(unsigned Kind = 0) const override;
  // This does not apply to wasm.
  const uint32_t *getNoPreservedMask() const override { return nullptr; }
 
  const TargetRegisterClass *getConstrainedRegClassForOperand(
      const MachineOperand &MO, const MachineRegisterInfo &MRI) const override;
};
 
} // end namespace llvm
 
#endif