llvm/llvm/lib/Target/WebAssembly/WebAssemblyReplacePhysRegs.cpp

//===-- WebAssemblyReplacePhysRegs.cpp - Replace phys regs with virt regs -===//
//
// 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 implements a pass that replaces physical registers with
/// virtual registers.
///
/// LLVM expects certain physical registers, such as a stack pointer. However,
/// WebAssembly doesn't actually have such physical registers. This pass is run
/// once LLVM no longer needs these registers, and replaces them with virtual
/// registers, so they can participate in register stackifying and coloring in
/// the normal way.
///
//===----------------------------------------------------------------------===//

#include "MCTargetDesc/WebAssemblyMCTargetDesc.h"
#include "WebAssembly.h"
#include "WebAssemblyMachineFunctionInfo.h"
#include "WebAssemblySubtarget.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
usingnamespacellvm;

#define DEBUG_TYPE …

namespace {
class WebAssemblyReplacePhysRegs final : public MachineFunctionPass { … };
} // end anonymous namespace

char WebAssemblyReplacePhysRegs::ID = …;
INITIALIZE_PASS(…)

FunctionPass *llvm::createWebAssemblyReplacePhysRegs() { … }

bool WebAssemblyReplacePhysRegs::runOnMachineFunction(MachineFunction &MF) { … }