mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-19 11:02:59 +02:00
3e722aec8c
We have 6 globals, all of which except for __table_base are 64-bit under wasm64. Differential Revision: https://reviews.llvm.org/D82130
75 lines
3.0 KiB
C++
75 lines
3.0 KiB
C++
// WebAssemblyFrameLowering.h - TargetFrameLowering for WebAssembly -*- 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 class implements WebAssembly-specific bits of
|
|
/// TargetFrameLowering class.
|
|
///
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYFRAMELOWERING_H
|
|
#define LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYFRAMELOWERING_H
|
|
|
|
#include "llvm/CodeGen/TargetFrameLowering.h"
|
|
|
|
namespace llvm {
|
|
|
|
class WebAssemblyFrameLowering final : public TargetFrameLowering {
|
|
public:
|
|
/// Size of the red zone for the user stack (leaf functions can use this much
|
|
/// space below the stack pointer without writing it back to __stack_pointer
|
|
/// global).
|
|
// TODO: (ABI) Revisit and decide how large it should be.
|
|
static const size_t RedZoneSize = 128;
|
|
|
|
WebAssemblyFrameLowering()
|
|
: TargetFrameLowering(StackGrowsDown, /*StackAlignment=*/Align(16),
|
|
/*LocalAreaOffset=*/0,
|
|
/*TransientStackAlignment=*/Align(16),
|
|
/*StackRealignable=*/true) {}
|
|
|
|
MachineBasicBlock::iterator
|
|
eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
|
|
MachineBasicBlock::iterator I) const override;
|
|
|
|
/// These methods insert prolog and epilog code into the function.
|
|
void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
|
|
void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
|
|
|
|
bool hasFP(const MachineFunction &MF) const override;
|
|
bool hasReservedCallFrame(const MachineFunction &MF) const override;
|
|
DwarfFrameBase getDwarfFrameBase(const MachineFunction &MF) const override;
|
|
|
|
bool needsPrologForEH(const MachineFunction &MF) const;
|
|
|
|
/// Write SP back to __stack_pointer global.
|
|
void writeSPToGlobal(unsigned SrcReg, MachineFunction &MF,
|
|
MachineBasicBlock &MBB,
|
|
MachineBasicBlock::iterator &InsertStore,
|
|
const DebugLoc &DL) const;
|
|
|
|
static unsigned getSPReg(const MachineFunction &MF);
|
|
static unsigned getFPReg(const MachineFunction &MF);
|
|
static unsigned getOpcConst(const MachineFunction &MF);
|
|
static unsigned getOpcAdd(const MachineFunction &MF);
|
|
static unsigned getOpcSub(const MachineFunction &MF);
|
|
static unsigned getOpcAnd(const MachineFunction &MF);
|
|
static unsigned getOpcGlobGet(const MachineFunction &MF);
|
|
static unsigned getOpcGlobSet(const MachineFunction &MF);
|
|
|
|
private:
|
|
bool hasBP(const MachineFunction &MF) const;
|
|
bool needsSPForLocalFrame(const MachineFunction &MF) const;
|
|
bool needsSP(const MachineFunction &MF) const;
|
|
bool needsSPWriteback(const MachineFunction &MF) const;
|
|
};
|
|
|
|
} // end namespace llvm
|
|
|
|
#endif
|