void SimpleModuleProvider::UnwrapModuleContainer(llvm::MemoryBufferRef Buffer,
llvm::BitstreamReader &StreamFile)
const
{
StreamFile.init((const unsigned char *)Buffer.getBufferStart(),
(const unsigned char *)Buffer.getBufferEnd());
}
void ObjectCache::notifyObjectCompiled(llvm::Module const* _module, llvm::MemoryBufferRef _object)
{
Guard g{x_cacheMutex};
// Only in "on" and "write" mode
if (g_mode != CacheMode::on && g_mode != CacheMode::write)
return;
// TODO: Disabled because is not thread-safe.
// if (g_listener)
// g_listener->stateChanged(ExecState::CacheWrite);
auto&& id = _module->getModuleIdentifier();
llvm::SmallString<256> cachePath{getVersionedCacheDir()};
if (auto err = llvm::sys::fs::create_directories(cachePath))
{
DLOG(cache) << "Cannot create cache dir " << cachePath.str().str() << " (error: " << err.message() << "\n";
return;
}
llvm::sys::path::append(cachePath, id);
DLOG(cache) << id << ": write\n";
std::error_code error;
llvm::raw_fd_ostream cacheFile(cachePath, error, llvm::sys::fs::F_None);
cacheFile << _object.getBuffer();
}
void PystonObjectCache::notifyObjectCompiled(const llvm::Module* M, llvm::MemoryBufferRef Obj)
#endif
{
RELEASE_ASSERT(module_identifier == M->getModuleIdentifier(), "");
RELEASE_ASSERT(!hash_before_codegen.empty(), "");
llvm::SmallString<128> cache_file = cache_dir;
llvm::sys::path::append(cache_file, hash_before_codegen);
if (!llvm::sys::fs::exists(cache_dir.str()) && llvm::sys::fs::create_directories(cache_dir.str()))
return;
CompressedFile::writeFile(cache_file, Obj.getBuffer());
}
StringRef
RawPCHContainerReader::ExtractPCH(llvm::MemoryBufferRef Buffer) const {
return Buffer.getBuffer();
}
// With -fembed-bitcode, save a copy of the llvm IR as data in the
// __LLVM,__bitcode section.
void clang::EmbedBitcode(llvm::Module *M, const CodeGenOptions &CGOpts,
llvm::MemoryBufferRef Buf) {
if (CGOpts.getEmbedBitcode() == CodeGenOptions::Embed_Off)
return;
// Save llvm.compiler.used and remote it.
SmallVector<Constant*, 2> UsedArray;
SmallSet<GlobalValue*, 4> UsedGlobals;
Type *UsedElementType = Type::getInt8Ty(M->getContext())->getPointerTo(0);
GlobalVariable *Used = collectUsedGlobalVariables(*M, UsedGlobals, true);
for (auto *GV : UsedGlobals) {
if (GV->getName() != "llvm.embedded.module" &&
GV->getName() != "llvm.cmdline")
UsedArray.push_back(
ConstantExpr::getPointerBitCastOrAddrSpaceCast(GV, UsedElementType));
}
if (Used)
Used->eraseFromParent();
// Embed the bitcode for the llvm module.
std::string Data;
ArrayRef<uint8_t> ModuleData;
Triple T(M->getTargetTriple());
// Create a constant that contains the bitcode.
// In case of embedding a marker, ignore the input Buf and use the empty
// ArrayRef. It is also legal to create a bitcode marker even Buf is empty.
if (CGOpts.getEmbedBitcode() != CodeGenOptions::Embed_Marker) {
if (!isBitcode((const unsigned char *)Buf.getBufferStart(),
(const unsigned char *)Buf.getBufferEnd())) {
// If the input is LLVM Assembly, bitcode is produced by serializing
// the module. Use-lists order need to be perserved in this case.
llvm::raw_string_ostream OS(Data);
llvm::WriteBitcodeToFile(M, OS, /* ShouldPreserveUseListOrder */ true);
ModuleData =
ArrayRef<uint8_t>((const uint8_t *)OS.str().data(), OS.str().size());
} else
// If the input is LLVM bitcode, write the input byte stream directly.
ModuleData = ArrayRef<uint8_t>((const uint8_t *)Buf.getBufferStart(),
Buf.getBufferSize());
}
llvm::Constant *ModuleConstant =
llvm::ConstantDataArray::get(M->getContext(), ModuleData);
llvm::GlobalVariable *GV = new llvm::GlobalVariable(
*M, ModuleConstant->getType(), true, llvm::GlobalValue::PrivateLinkage,
ModuleConstant);
GV->setSection(getSectionNameForBitcode(T));
UsedArray.push_back(
ConstantExpr::getPointerBitCastOrAddrSpaceCast(GV, UsedElementType));
if (llvm::GlobalVariable *Old =
M->getGlobalVariable("llvm.embedded.module", true)) {
assert(Old->hasOneUse() &&
"llvm.embedded.module can only be used once in llvm.compiler.used");
GV->takeName(Old);
Old->eraseFromParent();
} else {
GV->setName("llvm.embedded.module");
}
// Skip if only bitcode needs to be embedded.
if (CGOpts.getEmbedBitcode() != CodeGenOptions::Embed_Bitcode) {
// Embed command-line options.
ArrayRef<uint8_t> CmdData(const_cast<uint8_t *>(CGOpts.CmdArgs.data()),
CGOpts.CmdArgs.size());
llvm::Constant *CmdConstant =
llvm::ConstantDataArray::get(M->getContext(), CmdData);
GV = new llvm::GlobalVariable(*M, CmdConstant->getType(), true,
llvm::GlobalValue::PrivateLinkage,
CmdConstant);
GV->setSection(getSectionNameForCommandline(T));
UsedArray.push_back(
ConstantExpr::getPointerBitCastOrAddrSpaceCast(GV, UsedElementType));
if (llvm::GlobalVariable *Old =
M->getGlobalVariable("llvm.cmdline", true)) {
assert(Old->hasOneUse() &&
"llvm.cmdline can only be used once in llvm.compiler.used");
GV->takeName(Old);
Old->eraseFromParent();
} else {
GV->setName("llvm.cmdline");
}
}
if (UsedArray.empty())
return;
// Recreate llvm.compiler.used.
ArrayType *ATy = ArrayType::get(UsedElementType, UsedArray.size());
auto *NewUsed = new GlobalVariable(
*M, ATy, false, llvm::GlobalValue::AppendingLinkage,
llvm::ConstantArray::get(ATy, UsedArray), "llvm.compiler.used");
NewUsed->setSection("llvm.metadata");
}
void RawPCHContainerOperations::ExtractPCH(
llvm::MemoryBufferRef Buffer, llvm::BitstreamReader &StreamFile) const {
StreamFile.init((const unsigned char *)Buffer.getBufferStart(),
(const unsigned char *)Buffer.getBufferEnd());
}
