llvm/llvm/lib/Object/IRSymtab.cpp

//===- IRSymtab.cpp - implementation of IR symbol tables ------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//

#include "llvm/Object/IRSymtab.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Bitcode/BitcodeReader.h"
#include "llvm/Config/llvm-config.h"
#include "llvm/IR/Comdat.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/GlobalAlias.h"
#include "llvm/IR/GlobalObject.h"
#include "llvm/IR/Mangler.h"
#include "llvm/IR/Metadata.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/RuntimeLibcalls.h"
#include "llvm/MC/StringTableBuilder.h"
#include "llvm/Object/ModuleSymbolTable.h"
#include "llvm/Object/SymbolicFile.h"
#include "llvm/Support/Allocator.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Error.h"
#include "llvm/Support/StringSaver.h"
#include "llvm/Support/VCSRevision.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/TargetParser/Triple.h"
#include <cassert>
#include <string>
#include <utility>
#include <vector>

usingnamespacellvm;
usingnamespaceirsymtab;

static cl::opt<bool> DisableBitcodeVersionUpgrade(
    "disable-bitcode-version-upgrade", cl::Hidden,
    cl::desc("Disable automatic bitcode upgrade for version mismatch"));

static const char *PreservedSymbols[] = …;

namespace {

const char *getExpectedProducerName() { … }

const char *kExpectedProducerName = …;

/// Stores the temporary state that is required to build an IR symbol table.
struct Builder { … };

Error Builder::addModule(Module *M) { … }

Expected<int> Builder::getComdatIndex(const Comdat *C, const Module *M) { … }

static DenseSet<StringRef> buildPreservedSymbolsSet(const Triple &TT) { … }

Error Builder::addSymbol(const ModuleSymbolTable &Msymtab,
                         const SmallPtrSet<GlobalValue *, 4> &Used,
                         ModuleSymbolTable::Symbol Msym) { … }

Error Builder::build(ArrayRef<Module *> IRMods) { … }

} // end anonymous namespace

Error irsymtab::build(ArrayRef<Module *> Mods, SmallVector<char, 0> &Symtab,
                      StringTableBuilder &StrtabBuilder,
                      BumpPtrAllocator &Alloc) { … }

// Upgrade a vector of bitcode modules created by an old version of LLVM by
// creating an irsymtab for them in the current format.
static Expected<FileContents> upgrade(ArrayRef<BitcodeModule> BMs) { … }

Expected<FileContents> irsymtab::readBitcode(const BitcodeFileContents &BFC) { … }