llvm/llvm/lib/Target/WebAssembly/WebAssemblyISelDAGToDAG.cpp

//- WebAssemblyISelDAGToDAG.cpp - A dag to dag inst selector for WebAssembly -//
//
// 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 defines an instruction selector for the WebAssembly target.
///
//===----------------------------------------------------------------------===//

#include "MCTargetDesc/WebAssemblyMCTargetDesc.h"
#include "WebAssembly.h"
#include "WebAssemblyISelLowering.h"
#include "WebAssemblyTargetMachine.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/SelectionDAGISel.h"
#include "llvm/CodeGen/WasmEHFuncInfo.h"
#include "llvm/IR/DiagnosticInfo.h"
#include "llvm/IR/Function.h" // To access function attributes.
#include "llvm/IR/IntrinsicsWebAssembly.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/KnownBits.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/raw_ostream.h"

usingnamespacellvm;

#define DEBUG_TYPE …
#define PASS_NAME …

//===--------------------------------------------------------------------===//
/// WebAssembly-specific code to select WebAssembly machine instructions for
/// SelectionDAG operations.
///
namespace {
class WebAssemblyDAGToDAGISel final : public SelectionDAGISel { … };

class WebAssemblyDAGToDAGISelLegacy : public SelectionDAGISelLegacy { … };
} // end anonymous namespace

char WebAssemblyDAGToDAGISelLegacy::ID;

INITIALIZE_PASS(…)

void WebAssemblyDAGToDAGISel::PreprocessISelDAG() { … }

static SDValue getTagSymNode(int Tag, SelectionDAG *DAG) { … }

void WebAssemblyDAGToDAGISel::Select(SDNode *Node) { … }

bool WebAssemblyDAGToDAGISel::SelectInlineAsmMemoryOperand(
    const SDValue &Op, InlineAsm::ConstraintCode ConstraintID,
    std::vector<SDValue> &OutOps) { … }

bool WebAssemblyDAGToDAGISel::SelectAddrAddOperands(MVT OffsetType, SDValue N,
                                                    SDValue &Offset,
                                                    SDValue &Addr) { … }

bool WebAssemblyDAGToDAGISel::SelectAddrOperands(MVT AddrType,
                                                 unsigned ConstOpc, SDValue N,
                                                 SDValue &Offset,
                                                 SDValue &Addr) { … }

bool WebAssemblyDAGToDAGISel::SelectAddrOperands32(SDValue Op, SDValue &Offset,
                                                   SDValue &Addr) { … }

bool WebAssemblyDAGToDAGISel::SelectAddrOperands64(SDValue Op, SDValue &Offset,
                                                   SDValue &Addr) { … }

/// This pass converts a legalized DAG into a WebAssembly-specific DAG, ready
/// for instruction scheduling.
FunctionPass *llvm::createWebAssemblyISelDag(WebAssemblyTargetMachine &TM,
                                             CodeGenOptLevel OptLevel) { … }