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usr / src / contrib / llvm-project / llvm / lib / Target / WebAssembly /

📁 ..
📁 AsmParser
📁 Disassembler
📁 MCTargetDesc
📄 README.txt(8.34 KB)
📁 TargetInfo
📄 WebAssembly.h(4.05 KB)
📄 WebAssembly.td(4.85 KB)
📄 WebAssemblyAddMissingPrototypes.cpp(5.41 KB)
📄 WebAssemblyArgumentMove.cpp(3.36 KB)
📄 WebAssemblyAsmPrinter.cpp(16.09 KB)
📄 WebAssemblyAsmPrinter.h(3.12 KB)
📄 WebAssemblyCFGSort.cpp(15.94 KB)
📄 WebAssemblyCFGStackify.cpp(55.56 KB)
📄 WebAssemblyDebugFixup.cpp(5.4 KB)
📄 WebAssemblyDebugValueManager.cpp(1.77 KB)
📄 WebAssemblyDebugValueManager.h(1.13 KB)
📄 WebAssemblyExceptionInfo.cpp(6.23 KB)
📄 WebAssemblyExceptionInfo.h(6.24 KB)
📄 WebAssemblyExplicitLocals.cpp(15.04 KB)
📄 WebAssemblyFastISel.cpp(40.39 KB)
📄 WebAssemblyFixBrTableDefaults.cpp(5.81 KB)
📄 WebAssemblyFixFunctionBitcasts.cpp(12.59 KB)
📄 WebAssemblyFixIrreducibleControlFlow.cpp(18.91 KB)
📄 WebAssemblyFrameLowering.cpp(12.68 KB)
📄 WebAssemblyFrameLowering.h(2.98 KB)
📄 WebAssemblyISD.def(1.17 KB)
📄 WebAssemblyISelDAGToDAG.cpp(9.08 KB)
📄 WebAssemblyISelLowering.cpp(68.59 KB)
📄 WebAssemblyISelLowering.h(5.85 KB)
📄 WebAssemblyInstrAtomics.td(48.5 KB)
📄 WebAssemblyInstrBulkMemory.td(2.84 KB)
📄 WebAssemblyInstrCall.td(3.21 KB)
📄 WebAssemblyInstrControl.td(7.93 KB)
📄 WebAssemblyInstrConv.td(14.1 KB)
📄 WebAssemblyInstrFloat.td(6.03 KB)
📄 WebAssemblyInstrFormats.td(3.1 KB)
📄 WebAssemblyInstrInfo.cpp(8.21 KB)
📄 WebAssemblyInstrInfo.h(2.63 KB)
📄 WebAssemblyInstrInfo.td(14.37 KB)
📄 WebAssemblyInstrInteger.td(6.05 KB)
📄 WebAssemblyInstrMemory.td(18.63 KB)
📄 WebAssemblyInstrRef.td(1.15 KB)
📄 WebAssemblyInstrSIMD.td(39.08 KB)
📄 WebAssemblyLateEHPrepare.cpp(14.57 KB)
📄 WebAssemblyLowerBrUnless.cpp(6.21 KB)
📄 WebAssemblyLowerEmscriptenEHSjLj.cpp(45.45 KB)
📄 WebAssemblyLowerGlobalDtors.cpp(7.79 KB)
📄 WebAssemblyMCInstLower.cpp(13.72 KB)
📄 WebAssemblyMCInstLower.h(1.63 KB)
📄 WebAssemblyMachineFunctionInfo.cpp(4.29 KB)
📄 WebAssemblyMachineFunctionInfo.h(6.75 KB)
📄 WebAssemblyMemIntrinsicResults.cpp(7.39 KB)
📄 WebAssemblyOptimizeLiveIntervals.cpp(4.61 KB)
📄 WebAssemblyOptimizeReturned.cpp(2.46 KB)
📄 WebAssemblyPeephole.cpp(6.33 KB)
📄 WebAssemblyPrepareForLiveIntervals.cpp(4.34 KB)
📄 WebAssemblyRegColoring.cpp(6.37 KB)
📄 WebAssemblyRegNumbering.cpp(3.86 KB)
📄 WebAssemblyRegStackify.cpp(38.22 KB)
📄 WebAssemblyRegisterInfo.cpp(6.21 KB)
📄 WebAssemblyRegisterInfo.h(1.74 KB)
📄 WebAssemblyRegisterInfo.td(2.83 KB)
📄 WebAssemblyReplacePhysRegs.cpp(3.89 KB)
📄 WebAssemblyRuntimeLibcallSignatures.cpp(33.82 KB)
📄 WebAssemblyRuntimeLibcallSignatures.h(1.37 KB)
📄 WebAssemblySelectionDAGInfo.cpp(2.57 KB)
📄 WebAssemblySelectionDAGInfo.h(1.94 KB)
📄 WebAssemblySetP2AlignOperands.cpp(3.32 KB)
📄 WebAssemblySubtarget.cpp(2.18 KB)
📄 WebAssemblySubtarget.h(3.88 KB)
📄 WebAssemblyTargetMachine.cpp(18.85 KB)
📄 WebAssemblyTargetMachine.h(2.29 KB)
📄 WebAssemblyTargetObjectFile.cpp(886 B)
📄 WebAssemblyTargetObjectFile.h(959 B)
📄 WebAssemblyTargetTransformInfo.cpp(2.9 KB)
📄 WebAssemblyTargetTransformInfo.h(2.5 KB)
📄 WebAssemblyUtilities.cpp(3.43 KB)
📄 WebAssemblyUtilities.h(1.8 KB)
📄 known_gcc_test_failures.txt(2.07 KB)

Editing: WebAssemblyExceptionInfo.h

//===-- WebAssemblyExceptionInfo.h - WebAssembly Exception Info -*- 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
/// \brief This file implements WebAssemblyException information analysis.
///
//===----------------------------------------------------------------------===//

#ifndef LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYEXCEPTIONINFO_H
#define LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYEXCEPTIONINFO_H

#include "WebAssembly.h"
#include "llvm/ADT/SetVector.h"
#include "llvm/CodeGen/MachineFunctionPass.h"

namespace llvm {

class MachineDominatorTree;
class MachineDominanceFrontier;

// WebAssembly instructions for exception handling are structured as follows:
//   try
//     instructions*
//   catch             ----|
//     instructions*       | -> A WebAssemblyException consists of this region
//   end               ----|
//
// A WebAssemblyException object contains BBs that belong to a 'catch' part of
// the try-catch-end structure to be created later. 'try' and 'end' markers
// are not present at this stage and will be generated in CFGStackify pass.
// Because CFGSort requires all the BBs within a catch part to be sorted
// together as it does for loops, this pass calculates the nesting structure of
// catch part of exceptions in a function.
//
// An exception catch part is defined as a BB with catch instruction and all
// other BBs dominated by this BB.
class WebAssemblyException {
  MachineBasicBlock *EHPad = nullptr;

WebAssemblyException *ParentException = nullptr;
  std::vector<std::unique_ptr<WebAssemblyException>> SubExceptions;
  std::vector<MachineBasicBlock *> Blocks;
  SmallPtrSet<const MachineBasicBlock *, 8> BlockSet;

public:
  WebAssemblyException(MachineBasicBlock *EHPad) : EHPad(EHPad) {}
  WebAssemblyException(const WebAssemblyException &) = delete;
  const WebAssemblyException &operator=(const WebAssemblyException &) = delete;

MachineBasicBlock *getEHPad() const { return EHPad; }
  MachineBasicBlock *getHeader() const { return EHPad; }
  WebAssemblyException *getParentException() const { return ParentException; }
  void setParentException(WebAssemblyException *WE) { ParentException = WE; }

bool contains(const WebAssemblyException *WE) const {
    if (WE == this)
      return true;
    if (!WE)
      return false;
    return contains(WE->getParentException());
  }
  bool contains(const MachineBasicBlock *MBB) const {
    return BlockSet.count(MBB);
  }

void addBlock(MachineBasicBlock *MBB) {
    Blocks.push_back(MBB);
    BlockSet.insert(MBB);
  }
  ArrayRef<MachineBasicBlock *> getBlocks() const { return Blocks; }
  using block_iterator = typename ArrayRef<MachineBasicBlock *>::const_iterator;
  block_iterator block_begin() const { return getBlocks().begin(); }
  block_iterator block_end() const { return getBlocks().end(); }
  inline iterator_range<block_iterator> blocks() const {
    return make_range(block_begin(), block_end());
  }
  unsigned getNumBlocks() const { return Blocks.size(); }
  std::vector<MachineBasicBlock *> &getBlocksVector() { return Blocks; }

const std::vector<std::unique_ptr<WebAssemblyException>> &getSubExceptions() const {
    return SubExceptions;
  }
  std::vector<std::unique_ptr<WebAssemblyException>> &getSubExceptions() {
    return SubExceptions;
  }
  void addSubException(std::unique_ptr<WebAssemblyException> E) {
    SubExceptions.push_back(std::move(E));
  }
  using iterator = typename decltype(SubExceptions)::const_iterator;
  iterator begin() const { return SubExceptions.begin(); }
  iterator end() const { return SubExceptions.end(); }

void reserveBlocks(unsigned Size) { Blocks.reserve(Size); }
  void reverseBlock(unsigned From = 0) {
    std::reverse(Blocks.begin() + From, Blocks.end());
  }

// Return the nesting level. An outermost one has depth 1.
  unsigned getExceptionDepth() const {
    unsigned D = 1;
    for (const WebAssemblyException *CurException = ParentException;
         CurException; CurException = CurException->ParentException)
      ++D;
    return D;
  }

void print(raw_ostream &OS, unsigned Depth = 0) const;
  void dump() const;
};

raw_ostream &operator<<(raw_ostream &OS, const WebAssemblyException &WE);

class WebAssemblyExceptionInfo final : public MachineFunctionPass {
  // Mapping of basic blocks to the innermost exception they occur in
  DenseMap<const MachineBasicBlock *, WebAssemblyException *> BBMap;
  std::vector<std::unique_ptr<WebAssemblyException>> TopLevelExceptions;

void discoverAndMapException(WebAssemblyException *WE,
                               const MachineDominatorTree &MDT,
                               const MachineDominanceFrontier &MDF);
  WebAssemblyException *getOutermostException(MachineBasicBlock *MBB) const;

public:
  static char ID;
  WebAssemblyExceptionInfo() : MachineFunctionPass(ID) {
    initializeWebAssemblyExceptionInfoPass(*PassRegistry::getPassRegistry());
  }
  ~WebAssemblyExceptionInfo() override { releaseMemory(); }
  WebAssemblyExceptionInfo(const WebAssemblyExceptionInfo &) = delete;
  WebAssemblyExceptionInfo &
  operator=(const WebAssemblyExceptionInfo &) = delete;

bool runOnMachineFunction(MachineFunction &) override;
  void releaseMemory() override;
  void recalculate(MachineDominatorTree &MDT,
                   const MachineDominanceFrontier &MDF);
  void getAnalysisUsage(AnalysisUsage &AU) const override;

bool empty() const { return TopLevelExceptions.empty(); }

// Return the innermost exception that MBB lives in. If the block is not in an
  // exception, null is returned.
  WebAssemblyException *getExceptionFor(const MachineBasicBlock *MBB) const {
    return BBMap.lookup(MBB);
  }

void changeExceptionFor(MachineBasicBlock *MBB, WebAssemblyException *WE) {
    if (!WE) {
      BBMap.erase(MBB);
      return;
    }
    BBMap[MBB] = WE;
  }

void addTopLevelException(std::unique_ptr<WebAssemblyException> WE) {
    assert(!WE->getParentException() && "Not a top level exception!");
    TopLevelExceptions.push_back(std::move(WE));
  }

void print(raw_ostream &OS, const Module *M = nullptr) const override;
};

} // end namespace llvm

#endif

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Editing: WebAssemblyExceptionInfo.h

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