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📄 ConstantPools.h(3.35 KB)
📄 LaneBitmask.h(3.24 KB)
📄 MCAsmBackend.h(8.09 KB)
📄 MCAsmInfo.h(25.48 KB)
📄 MCAsmInfoCOFF.h(900 B)
📄 MCAsmInfoDarwin.h(927 B)
📄 MCAsmInfoELF.h(711 B)
📄 MCAsmInfoWasm.h(612 B)
📄 MCAsmInfoXCOFF.h(792 B)
📄 MCAsmLayout.h(3.75 KB)
📄 MCAsmMacro.h(4.54 KB)
📄 MCAssembler.h(16.1 KB)
📄 MCCodeEmitter.h(1.53 KB)
📄 MCCodeView.h(9.03 KB)
📄 MCContext.h(31.99 KB)
📄 MCDirectives.h(3.12 KB)
📁 MCDisassembler
📄 MCDwarf.h(21.46 KB)
📄 MCELFObjectWriter.h(5.27 KB)
📄 MCELFStreamer.h(3.97 KB)
📄 MCExpr.h(21.55 KB)
📄 MCFixedLenDisassembler.h(1.39 KB)
📄 MCFixup.h(7.4 KB)
📄 MCFixupKindInfo.h(1.6 KB)
📄 MCFragment.h(17.72 KB)
📄 MCInst.h(6.06 KB)
📄 MCInstBuilder.h(1.76 KB)
📄 MCInstPrinter.h(5.88 KB)
📄 MCInstrAnalysis.h(6.8 KB)
📄 MCInstrDesc.h(25.13 KB)
📄 MCInstrInfo.h(2.93 KB)
📄 MCInstrItineraries.h(9.02 KB)
📄 MCLabel.h(1.63 KB)
📄 MCLinkerOptimizationHint.h(5.73 KB)
📄 MCMachObjectWriter.h(9.77 KB)
📄 MCObjectFileInfo.h(16.57 KB)
📄 MCObjectStreamer.h(8.78 KB)
📄 MCObjectWriter.h(4.44 KB)
📁 MCParser
📄 MCRegister.h(4.16 KB)
📄 MCRegisterInfo.h(28.96 KB)
📄 MCSchedule.h(16.25 KB)
📄 MCSection.h(6.52 KB)
📄 MCSectionCOFF.h(3.37 KB)
📄 MCSectionELF.h(3.3 KB)
📄 MCSectionMachO.h(3.15 KB)
📄 MCSectionWasm.h(2.78 KB)
📄 MCSectionXCOFF.h(3.22 KB)
📄 MCStreamer.h(43.55 KB)
📄 MCSubtargetInfo.h(10.04 KB)
📄 MCSymbol.h(13.8 KB)
📄 MCSymbolCOFF.h(1.62 KB)
📄 MCSymbolELF.h(1.45 KB)
📄 MCSymbolMachO.h(4.18 KB)
📄 MCSymbolWasm.h(4.28 KB)
📄 MCSymbolXCOFF.h(2.39 KB)
📄 MCTargetOptions.h(2.29 KB)
📄 MCTargetOptionsCommandFlags.h(1.26 KB)
📄 MCValue.h(2.42 KB)
📄 MCWasmObjectWriter.h(1.61 KB)
📄 MCWasmStreamer.h(2.83 KB)
📄 MCWin64EH.h(2.41 KB)
📄 MCWinCOFFObjectWriter.h(1.81 KB)
📄 MCWinCOFFStreamer.h(3.05 KB)
📄 MCWinEH.h(1.97 KB)
📄 MCXCOFFObjectWriter.h(1.45 KB)
📄 MCXCOFFStreamer.h(1.86 KB)
📄 MachineLocation.h(2.04 KB)
📄 SectionKind.h(7.53 KB)
📄 StringTableBuilder.h(2.47 KB)
📄 SubtargetFeature.h(7.12 KB)

Editing: ConstantPools.h

//===- ConstantPools.h - Keep track of assembler-generated ------*- 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
//
//===----------------------------------------------------------------------===//
//
// This file declares the ConstantPool and AssemblerConstantPools classes.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_MC_CONSTANTPOOLS_H
#define LLVM_MC_CONSTANTPOOLS_H

#include "llvm/ADT/MapVector.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/Support/SMLoc.h"
#include <cstdint>
#include <map>

namespace llvm {

class MCContext;
class MCExpr;
class MCSection;
class MCStreamer;
class MCSymbol;
class MCSymbolRefExpr;

struct ConstantPoolEntry {
  ConstantPoolEntry(MCSymbol *L, const MCExpr *Val, unsigned Sz, SMLoc Loc_)
    : Label(L), Value(Val), Size(Sz), Loc(Loc_) {}

MCSymbol *Label;
  const MCExpr *Value;
  unsigned Size;
  SMLoc Loc;
};

// A class to keep track of assembler-generated constant pools that are use to
// implement the ldr-pseudo.
class ConstantPool {
  using EntryVecTy = SmallVector<ConstantPoolEntry, 4>;
  EntryVecTy Entries;
  std::map<int64_t, const MCSymbolRefExpr *> CachedEntries;

public:
  // Initialize a new empty constant pool
  ConstantPool() = default;

// Add a new entry to the constant pool in the next slot.
  // \param Value is the new entry to put in the constant pool.
  // \param Size is the size in bytes of the entry
  //
  // \returns a MCExpr that references the newly inserted value
  const MCExpr *addEntry(const MCExpr *Value, MCContext &Context,
                         unsigned Size, SMLoc Loc);

// Emit the contents of the constant pool using the provided streamer.
  void emitEntries(MCStreamer &Streamer);

// Return true if the constant pool is empty
  bool empty();

void clearCache();
};

class AssemblerConstantPools {
  // Map type used to keep track of per-Section constant pools used by the
  // ldr-pseudo opcode. The map associates a section to its constant pool. The
  // constant pool is a vector of (label, value) pairs. When the ldr
  // pseudo is parsed we insert a new (label, value) pair into the constant pool
  // for the current section and add MCSymbolRefExpr to the new label as
  // an opcode to the ldr. After we have parsed all the user input we
  // output the (label, value) pairs in each constant pool at the end of the
  // section.
  //
  // We use the MapVector for the map type to ensure stable iteration of
  // the sections at the end of the parse. We need to iterate over the
  // sections in a stable order to ensure that we have print the
  // constant pools in a deterministic order when printing an assembly
  // file.
  using ConstantPoolMapTy = MapVector<MCSection *, ConstantPool>;
  ConstantPoolMapTy ConstantPools;

public:
  void emitAll(MCStreamer &Streamer);
  void emitForCurrentSection(MCStreamer &Streamer);
  void clearCacheForCurrentSection(MCStreamer &Streamer);
  const MCExpr *addEntry(MCStreamer &Streamer, const MCExpr *Expr,
                         unsigned Size, SMLoc Loc);

private:
  ConstantPool *getConstantPool(MCSection *Section);
  ConstantPool &getOrCreateConstantPool(MCSection *Section);
};

} // end namespace llvm

#endif // LLVM_MC_CONSTANTPOOLS_H

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