llvm/llvm/lib/Target/WebAssembly/WebAssemblyMCInstLower.cpp

// WebAssemblyMCInstLower.cpp - Convert WebAssembly MachineInstr to an MCInst //
//
// 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 code to lower WebAssembly MachineInstrs to their
/// corresponding MCInst records.
///
//===----------------------------------------------------------------------===//

#include "WebAssemblyMCInstLower.h"
#include "MCTargetDesc/WebAssemblyMCTargetDesc.h"
#include "TargetInfo/WebAssemblyTargetInfo.h"
#include "Utils/WebAssemblyTypeUtilities.h"
#include "WebAssemblyAsmPrinter.h"
#include "WebAssemblyISelLowering.h"
#include "WebAssemblyMachineFunctionInfo.h"
#include "WebAssemblyUtilities.h"
#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/IR/Constants.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCSymbolWasm.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"

usingnamespacellvm;

// This disables the removal of registers when lowering into MC, as required
// by some current tests.
cl::opt<bool>
    WasmKeepRegisters("wasm-keep-registers", cl::Hidden,
                      cl::desc("WebAssembly: output stack registers in"
                               " instruction output for test purposes only."),
                      cl::init(false));

static void removeRegisterOperands(const MachineInstr *MI, MCInst &OutMI);

MCSymbol *
WebAssemblyMCInstLower::GetGlobalAddressSymbol(const MachineOperand &MO) const { … }

MCSymbol *WebAssemblyMCInstLower::GetExternalSymbolSymbol(
    const MachineOperand &MO) const { … }

MCOperand WebAssemblyMCInstLower::lowerSymbolOperand(const MachineOperand &MO,
                                                     MCSymbol *Sym) const { … }

MCOperand WebAssemblyMCInstLower::lowerTypeIndexOperand(
    SmallVectorImpl<wasm::ValType> &&Returns,
    SmallVectorImpl<wasm::ValType> &&Params) const { … }

static void getFunctionReturns(const MachineInstr *MI,
                               SmallVectorImpl<wasm::ValType> &Returns) { … }

void WebAssemblyMCInstLower::lower(const MachineInstr *MI,
                                   MCInst &OutMI) const { … }

static void removeRegisterOperands(const MachineInstr *MI, MCInst &OutMI) { … }