llvm/llvm/lib/Target/WebAssembly/WebAssemblyMCLowerPrePass.cpp

//===-- WebAssemblyMCLowerPrePass.cpp - Prepare for MC lower --------------===//
//
// 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
/// Some information in MC lowering / asm printing gets generated as
/// instructions get emitted, but may be necessary at the start, such as for
/// .globaltype declarations. This pass collects this information.
///
//===----------------------------------------------------------------------===//

#include "MCTargetDesc/WebAssemblyMCTargetDesc.h"
#include "WebAssembly.h"
#include "WebAssemblyMachineFunctionInfo.h"
#include "WebAssemblySubtarget.h"
#include "WebAssemblyUtilities.h"
#include "llvm/ADT/SCCIterator.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineLoopInfo.h"
#include "llvm/CodeGen/MachineModuleInfoImpls.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/IR/Module.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
usingnamespacellvm;

#define DEBUG_TYPE …

namespace {
class WebAssemblyMCLowerPrePass final : public ModulePass { … };
} // end anonymous namespace

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

ModulePass *llvm::createWebAssemblyMCLowerPrePass() { … }

// NOTE: this is a ModulePass since we need to enforce that this code has run
// for all functions before AsmPrinter. If this way of doing things is ever
// suboptimal, we could opt to make it a MachineFunctionPass and instead use
// something like createBarrierNoopPass() to enforce ordering.
//
// The information stored here is essential for emitExternalDecls in the Wasm
// AsmPrinter
bool WebAssemblyMCLowerPrePass::runOnModule(Module &M) { … }