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Code Issues Projects Releases Wiki Activity

Revert r188188 and r188200.

Browse Source 
In order to appease people (in Apple) who accuse me for committing "huge change" (?) without proper review. 

Thank Eric for fixing a compile-warning. 


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188204 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Shuxin Yang 2013-08-12 21:07:31 +00:00
parent b0a50ade8b
commit cfaa636a1d
11 changed files with 45 additions and 872 deletions
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12
include/llvm-c/lto.h
View File

@ -284,18 +284,6 @@ lto_codegen_compile(lto_code_gen_t cg, size_t* length);
extern bool
lto_codegen_compile_to_file(lto_code_gen_t cg, const char** name);
/**
* Get intermediate files that need to be removed before linker exit. Upon
* return, the paths of the files need to be removed is written to "paths". The
* paths are separated by a single '\0', and the last path is ended by double
* '\0's. A file could be a directory; in this case, the entire directory needs
* to be removed recursively.
*
* It is only necessary to call this function after \p lto_codegen_compile was
* successfully called.
*/
extern void
lto_codegen_get_files_need_remove(lto_code_gen_t cg, const char **paths);
/**
* Sets options to help debug codegen bugs.

32
tools/gold/gold-plugin.cpp
View File

@ -74,6 +74,7 @@ namespace options {
static bool generate_api_file = false;
static generate_bc generate_bc_file = BC_NO;
static std::string bc_path;
static std::string obj_path;
static std::string extra_library_path;
static std::string triple;
static std::string mcpu;
@ -98,6 +99,8 @@ namespace options {
extra_library_path = opt.substr(strlen("extra_library_path="));
} else if (opt.startswith("mtriple=")) {
triple = opt.substr(strlen("mtriple="));
} else if (opt.startswith("obj-path=")) {
obj_path = opt.substr(strlen("obj-path="));
} else if (opt == "emit-llvm") {
generate_bc_file = BC_ONLY;
} else if (opt == "also-emit-llvm") {
@ -422,14 +425,6 @@ static ld_plugin_status all_symbols_read_hook(void) {
(*message)(LDPL_ERROR, "Could not produce a combined object file\n");
}
// Get files that need to be removed in cleanup_hook.
const char *ToRm;
lto_codegen_get_files_need_remove(code_gen, &ToRm);
while (*ToRm) {
Cleanup.push_back(std::string(ToRm));
ToRm += strlen(ToRm) + 1;
}
lto_codegen_dispose(code_gen);
for (std::list<claimed_file>::iterator I = Modules.begin(),
E = Modules.end(); I != E; ++I) {
@ -451,28 +446,17 @@ static ld_plugin_status all_symbols_read_hook(void) {
return LDPS_ERR;
}
if (options::obj_path.empty())
Cleanup.push_back(objPath);
return LDPS_OK;
}
static ld_plugin_status cleanup_hook(void) {
for (int i = 0, e = Cleanup.size(); i != e; ++i) {
const char *FN = Cleanup[i].c_str();
sys::fs::file_status Stat;
error_code EC = sys::fs::status(Twine(FN), Stat);
if (EC) {
(*message)(LDPL_ERROR, "Failed to stat '%s': %s", FN,
EC.message().c_str());
continue;
}
uint32_t Dummy;
if (sys::fs::is_directory(FN))
EC = sys::fs::remove_all(Twine(FN), Dummy);
else
EC = sys::fs::remove(Twine(FN));
error_code EC = sys::fs::remove(Cleanup[i]);
if (EC)
(*message)(LDPL_ERROR, "Failed to remove '%s': %s", FN,
(*message)(LDPL_ERROR, "Failed to delete '%s': %s", Cleanup[i].c_str(),
EC.message().c_str());
}

2
tools/lto/CMakeLists.txt
View File

@ -9,8 +9,6 @@ set(SOURCES
LTODisassembler.cpp
lto.cpp
LTOModule.cpp
LTOPartition.cpp
LTOPostIPODriver.cpp
)
set(LLVM_COMMON_DEPENDS intrinsics_gen)

199
tools/lto/LTOCodeGenerator.cpp
View File

@ -14,8 +14,6 @@
#include "LTOCodeGenerator.h"
#include "LTOModule.h"
#include "LTOPartition.h"
#include "LTOPostIPODriver.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Analysis/Passes.h"
#include "llvm/Analysis/Verifier.h"
@ -37,13 +35,11 @@
#include "llvm/Support/FormattedStream.h"
#include "llvm/Support/Host.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/Program.h"
#include "llvm/Support/Signals.h"
#include "llvm/Support/TargetRegistry.h"
#include "llvm/Support/TargetSelect.h"
#include "llvm/Support/ToolOutputFile.h"
#include "llvm/Support/system_error.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Target/Mangler.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetOptions.h"
@ -51,16 +47,8 @@
#include "llvm/Transforms/IPO.h"
#include "llvm/Transforms/IPO/PassManagerBuilder.h"
#include "llvm/Transforms/ObjCARC.h"
using namespace llvm;
using namespace lto;
// /////////////////////////////////////////////////////////////////////////////
//
// Internal options. To avoid collision, most options start with "lto-".
//
// /////////////////////////////////////////////////////////////////////////////
//
static cl::opt<bool>
DisableOpt("disable-opt", cl::init(false),
cl::desc("Do not run any optimization passes"));
@ -73,28 +61,6 @@ static cl::opt<bool>
DisableGVNLoadPRE("disable-gvn-loadpre", cl::init(false),
cl::desc("Do not run the GVN load PRE pass"));
// To break merged module into partitions, and compile them independently.
static cl::opt<bool>
EnablePartition("lto-partition", cl::init(false),
cl::desc("Partition program and compile each piece in parallel"));
// Specify the work-directory for the LTO compilation. All intermeidate
// files will be created immediately under this dir. If it is not
// specified, compiler will create an unique directory under current-dir.
//
static cl::opt<std::string>
TmpWorkDir("lto-workdir", cl::init(""), cl::desc("Specify working directory"));
static cl::opt<bool>
KeepWorkDir("lto-keep", cl::init(false), cl::desc("Keep working directory"));
// /////////////////////////////////////////////////////////////////////////////
//
// Implementation of LTOCodeGenerator
//
// /////////////////////////////////////////////////////////////////////////////
//
const char* LTOCodeGenerator::getVersionString() {
#ifdef LLVM_VERSION_INFO
return PACKAGE_NAME " version " PACKAGE_VERSION ", " LLVM_VERSION_INFO;
@ -108,8 +74,7 @@ LTOCodeGenerator::LTOCodeGenerator()
_linker(new Module("ld-temp.o", _context)), _target(NULL),
_emitDwarfDebugInfo(false), _scopeRestrictionsDone(false),
_codeModel(LTO_CODEGEN_PIC_MODEL_DYNAMIC),
_nativeObjectFile(NULL), PartitionMgr(FileMgr),
OptionsParsed(false) {
_nativeObjectFile(NULL) {
InitializeAllTargets();
InitializeAllTargetMCs();
InitializeAllAsmPrinters();
@ -222,41 +187,35 @@ bool LTOCodeGenerator::writeMergedModules(const char *path,
return true;
}
// This function is to ensure cl::ParseCommandLineOptions() is called no more
// than once. It would otherwise complain and exit the compilation prematurely.
//
void LTOCodeGenerator::parseOptions() {
if (OptionsParsed)
return;
if (!_codegenOptions.empty())
cl::ParseCommandLineOptions(_codegenOptions.size(),
const_cast<char **>(&_codegenOptions[0]));
OptionsParsed = true;
}
// Do some prepartion right before compilation starts.
bool LTOCodeGenerator::prepareBeforeCompile(std::string &ErrMsg) {
parseOptions();
if (!determineTarget(ErrMsg))
bool LTOCodeGenerator::compile_to_file(const char** name, std::string& errMsg) {
// make unique temp .o file to put generated object file
SmallString<128> Filename;
int FD;
error_code EC = sys::fs::createTemporaryFile("lto-llvm", "o", FD, Filename);
if (EC) {
errMsg = EC.message();
return false;
}
FileMgr.setWorkDir(TmpWorkDir.c_str());
FileMgr.setKeepWorkDir(KeepWorkDir);
return FileMgr.createWorkDir(ErrMsg);
}
// generate object file
tool_output_file objFile(Filename.c_str(), FD);
bool LTOCodeGenerator::compile_to_file(const char** Name, std::string& ErrMsg) {
if (!prepareBeforeCompile(ErrMsg))
bool genResult = generateObjectFile(objFile.os(), errMsg);
objFile.os().close();
if (objFile.os().has_error()) {
objFile.os().clear_error();
sys::fs::remove(Twine(Filename));
return false;
}
performIPO(EnablePartition, ErrMsg);
if (!performPostIPO(ErrMsg))
objFile.keep();
if (!genResult) {
sys::fs::remove(Twine(Filename));
return false;
}
*Name = PartitionMgr.getSinglePartition()->getObjFilePath().c_str();
_nativeObjectPath = Filename.c_str();
*name = _nativeObjectPath.c_str();
return true;
}
@ -270,41 +229,21 @@ const void* LTOCodeGenerator::compile(size_t* length, std::string& errMsg) {
// read .o file into memory buffer
OwningPtr<MemoryBuffer> BuffPtr;
const char *BufStart = 0;
if (error_code ec = MemoryBuffer::getFile(name, BuffPtr, -1, false)) {
errMsg = ec.message();
_nativeObjectFile = 0;
} else {
if ((_nativeObjectFile = BuffPtr.take())) {
sys::fs::remove(_nativeObjectPath);
return NULL;
}
_nativeObjectFile = BuffPtr.take();
// remove temp files
sys::fs::remove(_nativeObjectPath);
// return buffer, unless error
if (_nativeObjectFile == NULL)
return NULL;
*length = _nativeObjectFile->getBufferSize();
BufStart = _nativeObjectFile->getBufferStart();
}
}
// Now that the resulting single object file is handed to linker via memory
// buffer, it is safe to remove all intermediate files now.
//
FileMgr.removeAllUnneededFiles();
return BufStart;
}
const char *LTOCodeGenerator::getFilesNeedToRemove() {
IPOFileMgr::FileNameVect ToRm;
FileMgr.getFilesNeedToRemove(ToRm);
ConcatStrings.clear();
for (IPOFileMgr::FileNameVect::iterator I = ToRm.begin(), E = ToRm.end();
I != E; I++) {
StringRef S(*I);
ConcatStrings.append(S.begin(), S.end());
ConcatStrings.push_back('\0');
}
ConcatStrings.push_back('\0');
ConcatStrings.push_back('\0');
return ConcatStrings.data();
return _nativeObjectFile->getBufferStart();
}
bool LTOCodeGenerator::determineTarget(std::string &errMsg) {
@ -312,7 +251,9 @@ bool LTOCodeGenerator::determineTarget(std::string &errMsg) {
return true;
// if options were requested, set them
parseOptions();
if (!_codegenOptions.empty())
cl::ParseCommandLineOptions(_codegenOptions.size(),
const_cast<char **>(&_codegenOptions[0]));
std::string TripleStr = _linker.getModule()->getTargetTriple();
if (TripleStr.empty())
@ -443,70 +384,6 @@ void LTOCodeGenerator::applyScopeRestrictions() {
_scopeRestrictionsDone = true;
}
void LTOCodeGenerator::performIPO(bool ToPartition, std::string &errMsg) {
// Mark which symbols can not be internalized
applyScopeRestrictions();
// Instantiate the pass manager to organize the passes.
PassManager Passes;
// Start off with a verification pass.
Passes.add(createVerifierPass());
// Add an appropriate DataLayout instance for this module...
Passes.add(new DataLayout(*_target->getDataLayout()));
_target->addAnalysisPasses(Passes);
// Enabling internalize here would use its AllButMain variant. It
// keeps only main if it exists and does nothing for libraries. Instead
// we create the pass ourselves with the symbol list provided by the linker.
if (!DisableOpt)
PassManagerBuilder().populateLTOPassManager(Passes,
/*Internalize=*/false,
!DisableInline,
DisableGVNLoadPRE);
// Make sure everything is still good.
Passes.add(createVerifierPass());
Module* M = _linker.getModule();
if (ToPartition)
assert(false && "TBD");
else {
Passes.run(*M);
// Create a partition for the merged module.
PartitionMgr.createIPOPart(M);
}
}
// Perform Post-IPO compilation. If the partition is enabled, there may
// be multiple partitions, and therefore there may be multiple objects.
// In this case, "MergeObjs" indicates to merge all object together (via ld -r)
// and return the path to the merged object via "MergObjPath".
//
bool LTOCodeGenerator::performPostIPO(std::string &ErrMsg,
bool MergeObjs,
const char **MergObjPath) {
// Determine the variant of post-ipo driver
PostIPODriver::VariantTy DrvTy;
if (!EnablePartition) {
assert(!MergeObjs && !MergObjPath && "Invalid parameter");
DrvTy = PostIPODriver::PIDV_SERIAL;
} else {
DrvTy = PostIPODriver::PIDV_Invalid;
assert(false && "TBD");
}
PostIPODriver D(DrvTy, _target, PartitionMgr, FileMgr, MergeObjs);
if (D.Compile(ErrMsg)) {
if (MergeObjs)
*MergObjPath = D.getSingleObjFile()->getPath().c_str();
return true;
}
return false;
}
/// Optimize merged modules using various IPO passes
bool LTOCodeGenerator::generateObjectFile(raw_ostream &out,
std::string &errMsg) {

39
tools/lto/LTOCodeGenerator.h
View File

@ -41,7 +41,6 @@
#include "llvm/Linker.h"
#include <string>
#include <vector>
#include "LTOPartition.h"
namespace llvm {
class LLVMContext;
@ -103,34 +102,16 @@ struct LTOCodeGenerator {
//
const void *compile(size_t *length, std::string &errMsg);
// Return the paths of the intermediate files that linker needs to delete
// before it exits. The paths are delimited by a single '\0', and the last
// path is ended by double '\0's. The file could be a directory. In that
// case, the entire directory should be erased recusively. This function
// must be called after the compilexxx() is successfuly called, because
// only after that moment, compiler is aware which files need to be removed.
// If calling compilexxx() is not successful, it is up to compiler to clean
// up all the intermediate files generated during the compilation process.
//
const char *getFilesNeedToRemove();
private:
void initializeLTOPasses();
bool determineTarget(std::string &errMsg);
void parseOptions();
bool prepareBeforeCompile(std::string &ErrMsg);
void performIPO(bool PerformPartition, std::string &ErrMsg);
bool performPostIPO(std::string &ErrMsg, bool MergeObjs = false,
const char **MergObjPath = 0);
bool generateObjectFile(llvm::raw_ostream &out, std::string &errMsg);
void applyScopeRestrictions();
void applyRestriction(llvm::GlobalValue &GV,
std::vector<const char*> &mustPreserveList,
llvm::SmallPtrSet<llvm::GlobalValue*, 8> &asmUsed,
llvm::Mangler &mangler);
bool determineTarget(std::string &errMsg);
typedef llvm::StringMap<uint8_t> StringSet;
@ -146,24 +127,6 @@ private:
std::vector<char*> _codegenOptions;
std::string _mCpu;
std::string _nativeObjectPath;
// To manage the partitions. If partition is not enabled, the whole merged
// module is considered as a single degenerated partition, and the "manager"
// is still active.
lto::IPOPartMgr PartitionMgr;
// To manage the intermediate files during the compilations.
lto::IPOFileMgr FileMgr;
// Sometimes we need to return a vector of strings in a "C" way (to work with
// the C-APIs). We encode such C-thinking string vector by concatenating all
// strings tegother with a single '\0' as the delimitor, the last string ended
// by double '\0's.
SmallVector<char, 4> ConcatStrings;
// Make sure command line is parsed only once. It would otherwise complain
// and quite prematurely.
bool OptionsParsed;
};
#endif // LTO_CODE_GENERATOR_H

205
tools/lto/LTOPartition.cpp
View File

@ -1,205 +0,0 @@
//===-- LTOPartition.cpp - Parition Merged Module --------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "LTOPartition.h"
#include "llvm/ADT/SetVector.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/Analysis/CallGraph.h"
#include "llvm/Bitcode/ReaderWriter.h"
#include "llvm/IR/Module.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Support/Path.h"
#include "llvm/Transforms/Utils/ValueMapper.h"
#include "llvm/Transforms/Utils/Cloning.h"
using namespace llvm;
using namespace lto;
// /////////////////////////////////////////////////////////////////////////////
//
// Implementation of IPOPartition and IPOPartMgr
//
// /////////////////////////////////////////////////////////////////////////////
//
IPOPartition::IPOPartition(Module *M, const char *NameWoExt, IPOFileMgr &FM) :
Mod(0), Ctx(0), IRFile(0), ObjFile(0), FileNameWoExt(NameWoExt), FileMgr(FM) {
}
IPOFile &IPOPartition::getIRFile() const {
if (IRFile)
return *IRFile;
else {
std::string FN(FileNameWoExt + ".bc");
return *(IRFile = FileMgr.createIRFile(FN.c_str()));
}
}
IPOFile &IPOPartition::getObjFile() const {
if (ObjFile)
return *ObjFile;
else {
std::string FN(FileNameWoExt + ".o");
return *(ObjFile = FileMgr.createObjFile(FN.c_str()));
}
}
bool IPOPartition::saveBitCode() {
if (!Mod) {
// The bit-code have already saved in disk.
return true;
}
IPOFile &F = getIRFile();
if (F.errOccur())
return false;
raw_fd_ostream OF(F.getPath().c_str(), F.getLastErrStr(),
sys::fs::F_Binary);
WriteBitcodeToFile(Mod, OF);
OF.close();
Mod = 0;
delete Ctx;
Ctx = 0;
return !F.errOccur();
}
bool IPOPartition::loadBitCode() {
if (Mod)
return true;
IPOFile &F = getIRFile();
if (F.errOccur())
return false;
Ctx = new LLVMContext;
error_code &EC = F.getLastErrCode();
std::string &ErrMsg = F.getLastErrStr();
OwningPtr<MemoryBuffer> Buf;
if (error_code ec = MemoryBuffer::getFile(F.getPath(), Buf, -1, false)) {
EC = ec;
ErrMsg += ec.message();
return false;
}
Mod = ParseBitcodeFile(Buf.get(), *Ctx, &ErrMsg);
return Mod != 0;
}
IPOPartition *IPOPartMgr::createIPOPart(Module *M) {
std::string PartName;
raw_string_ostream OS(PartName);
OS << "part" << NextPartId++;
IPOPartition *P = new IPOPartition(M, OS.str().c_str(), FileMgr);
P->Mod = M;
IPOParts.push_back(P);
return P;
}
// ///////////////////////////////////////////////////////////////////////////
//
// Implementation of IPOFile and IPOFileMgr
//
// ///////////////////////////////////////////////////////////////////////////
//
IPOFile::IPOFile(const char *DirName, const char *BaseName, bool KeepFile)
: Fname(BaseName), Keep(KeepFile) {
// Concatenate dirname and basename
StringRef D(DirName);
SmallVector<char, 64> Path(D.begin(), D.end());
sys::path::append(Path, Twine(BaseName));
Fpath = StringRef(Path.data(), Path.size());
}
IPOFileMgr::IPOFileMgr() {
IRFiles.reserve(20);
ObjFiles.reserve(20);
OtherFiles.reserve(8);
KeepWorkDir = false;
WorkDirCreated = false;
}
bool IPOFileMgr::createWorkDir(std::string &ErrorInfo) {
if (WorkDirCreated)
return true;
error_code EC;
if (WorkDir.empty()) {
// If the workdir is not specified, then create workdir under current
// directory.
//
SmallString<128> D;
if (sys::fs::current_path(D) != error_code::success()) {
ErrorInfo += "fail to get current directory";
return false;
}
sys::path::append(D, "llvmipo");
sys::fs::make_absolute(D);
SmallVector<char, 64> ResPath;
EC = sys::fs::createUniqueDirectory(Twine(StringRef(D.data(), D.size())),
ResPath);
WorkDir = StringRef(ResPath.data(), ResPath.size());
} else {
bool Exist;
EC = sys::fs::create_directory(Twine(WorkDir), Exist);
}
if (EC == error_code::success()) {
WorkDirCreated = true;
return true;
}
return false;
}
IPOFile *IPOFileMgr::createIRFile(const char *Name) {
IPOFile *F = CreateFile(Name);
IRFiles.push_back(F);
return F;
}
IPOFile *IPOFileMgr::createObjFile(const char *Name) {
IPOFile *F = CreateFile(Name);
ObjFiles.push_back(F);
return F;
}
IPOFile *IPOFileMgr::createMakefile(const char *Name) {
IPOFile *F = CreateFile(Name);
OtherFiles.push_back(F);
return F;
}
void IPOFileMgr::removeAllUnneededFiles() {
FileNameVect ToRm;
getFilesNeedToRemove(ToRm);
for (SmallVector<const char *, 4>::iterator I = ToRm.begin(), E = ToRm.end();
I != E; I++) {
const char *FN = *I;
sys::fs::file_status Stat;
if (sys::fs::status(Twine(FN), Stat) != error_code::success())
continue;
uint32_t Dummy;
if (sys::fs::is_directory(FN))
sys::fs::remove_all(Twine(FN), Dummy);
else
sys::fs::remove(Twine(FN));
}
}

187
tools/lto/LTOPartition.h
View File

@ -1,187 +0,0 @@
//===-------- LTOPartition.h - Partition related classes and functions ---===//
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file declare the partition related classes and functions. A partition
// is a portion of the merged module. In case partition is disabled, the entire
// merged module is considered as a degenerated partition.
//
// The classes declared in this file are:
// o. IPOPartition : to depicit a partition
// o. IPOFile: It is a "container" collecting miscellaneous information about
// an intermeidate file, including file name, path, last-err-message etc.
// o. IPOPartMgr, IPOFileMgr: as the name suggests, it's the manager of
// IPOPartitions and IPOFiles, respectively.
//
//===----------------------------------------------------------------------===//
#ifndef LTO_PARTITION_H
#define LTO_PARTITION_H
#include "llvm/Pass.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/Support/system_error.h"
using namespace llvm;
namespace lto {
/// \brief To collect miscellaneous information about an intermdiate file.
///
/// These informration include file name, path, last error message etc.
///
class IPOFile {
public:
const std::string &getName() { return Fname; }
const std::string &getPath() { return Fpath; }
error_code &getLastErrCode() { return LastErr; }
std::string &getLastErrStr() { return LastErrStr; }
bool errOccur() const {
return LastErr != error_code::success() || !LastErrStr.empty();
}
// To keep this file after compilation finish.
void setKeep() { Keep = true; }
bool isKept() const { return Keep; }
private:
friend class IPOFileMgr;
IPOFile(const char* DirName, const char *BaseName, bool Keep=false);
~IPOFile();
private:
std::string Fname;
std::string Fpath;
error_code LastErr;
std::string LastErrStr;
bool Keep;
};
/// \brief To manage IPOFiles, create and remove work-directory.
///
class IPOFileMgr {
public:
typedef SmallVector<const char *, 4> FileNameVect;
IPOFileMgr();
// NOTE: Do not delete intermeidate in the destructor as we never know
// if these files out-last the class or not. It is safe to let linker's
// clean-up hook to take care these files.
~IPOFileMgr() {};
void setWorkDir(const char* WD) {
assert(!WorkDirCreated /* Too late to change mind */ &&
WorkDir.empty() /* don't change back and forth */ &&
"Cannot change work dir");
WorkDir = WD;
}
void setKeepWorkDir(bool Keep) { KeepWorkDir = Keep; }
bool IsToKeepWorkDir() const { return KeepWorkDir; }
const std::string &getWorkDir() { return WorkDir; }
bool createWorkDir(std::string &ErrorInfo);
IPOFile *createIRFile(const char *Name);
IPOFile *createObjFile(const char *Name);
IPOFile *createMakefile(const char *Name);
typedef std::vector<IPOFile *> FileVect;
FileVect &getIRFiles() { return IRFiles; }
FileVect &getObjFiles() { return ObjFiles; }
// Get all files/dirs that need to removed after the LTO complete.
void getFilesNeedToRemove(FileNameVect &ToRm) {
ToRm.clear();
if (!IsToKeepWorkDir() && WorkDirCreated)
ToRm.push_back(WorkDir.c_str());
}
// Remove all files/dirs returned from getFilesNeedToRemove().
void removeAllUnneededFiles();
private:
IPOFile *CreateFile(const char *Name) {
return new IPOFile(WorkDir.c_str(), Name);
}
private:
FileVect IRFiles;
FileVect ObjFiles;
FileVect OtherFiles;
std::string WorkDir;
bool KeepWorkDir;
bool WorkDirCreated;
};
/// \brief Describe a partition of the merged module.
///
class IPOPartition {
public:
llvm::Module *getModule() const { return Mod; }
IPOFile &getIRFile() const;
IPOFile &getObjFile() const;
const std::string &getIRFilePath() const { return getIRFile().getPath(); }
const std::string &getObjFilePath() const { return getObjFile().getPath(); }
// If the bitcode reside in memory or disk
bool isInMemory() const { return Mod != 0; }
// Load/store bitcode from/to disk file.
bool saveBitCode();
bool loadBitCode();
private:
friend class IPOPartMgr;
IPOPartition(llvm::Module *M, const char *FileNameWoExt, IPOFileMgr &FM);
// The module associated with this partition
Module *Mod;
LLVMContext *Ctx;
// The bitcode file and its corresponding object file associated with
// this partition. The names of these two files are different only in
// extension; the "FileNameWoExt" record their (common) name without
// extension.
//
mutable IPOFile *IRFile;
mutable IPOFile *ObjFile;
std::string FileNameWoExt;
IPOFileMgr &FileMgr;
};
/// \brief To manage IPOPartitions
///
class IPOPartMgr {
public:
IPOPartMgr(IPOFileMgr &IFM) : FileMgr(IFM), NextPartId(1) {}
typedef std::vector<IPOPartition *> IPOPartsTy;
typedef IPOPartsTy::iterator iterator;
typedef IPOPartsTy::const_iterator const_iterator;
iterator begin() { return IPOParts.begin(); }
iterator end() { return IPOParts.end(); }
const_iterator begin() const { return IPOParts.begin(); }
const_iterator end() const { return IPOParts.end(); }
IPOPartition *createIPOPart(Module *);
IPOPartition *getSinglePartition() {
assert(IPOParts.size() == 1 && "Has multiple partition");
return IPOParts[0];
}
private:
IPOPartsTy IPOParts;
IPOFileMgr &FileMgr;
int NextPartId;
};
}
#endif //LTO_PARTITION_H

180
tools/lto/LTOPostIPODriver.cpp
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@ -1,180 +0,0 @@
//===---------- LTOPostIPODriver.h - PostIPO Driver -----------------------===//
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the PostIPODriver class which is the driver for Post-IPO
// compilation.
//
//===----------------------------------------------------------------------===//
#include "llvm/Analysis/AliasAnalysis.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/PassManager.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/FormattedStream.h"
#include "llvm/Support/Program.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Transforms/ObjCARC.h"
#include "LTOPartition.h"
#include "LTOPostIPODriver.h"
using namespace llvm;
using namespace lto;
// /////////////////////////////////////////////////////////////////////////////
//
// Declare all variants of Post-IPO drivers
//
// /////////////////////////////////////////////////////////////////////////////
//
namespace {
/// \breif Base class for all driver variants.
///
class PostIPODrvBaseImpl {
public:
PostIPODrvBaseImpl(TargetMachine *Targ, IPOPartMgr &IPM, IPOFileMgr &IFM,
bool ToMergeObjs):
PartMgr(IPM), FileMgr(IFM), MergedObjFile(0), Target(Targ),
MergeObjs(ToMergeObjs) {}
virtual ~PostIPODrvBaseImpl() {};
IPOPartMgr &getPartitionMgr() { return PartMgr; }
IPOFileMgr &getFileMgr() { return FileMgr; }
// Implement the PostIPODriver::getSingleObjFile()
virtual IPOFile *getSingleObjFile() const = 0;
bool IsToMergeObj() const { return MergeObjs; }
virtual bool Compile(std::string &ErrMsg) = 0;
protected:
// Populate post-IPO scalar optimization pass manager
bool PopulatePostIPOOptPM(PassManager &PM);
// Populate post-IPO machine-specific CodeGen pass manager
bool PopulateCodeGenPM(PassManager &PM, formatted_raw_ostream &OutFile,
std::string &Err);
protected:
IPOPartMgr &PartMgr;
IPOFileMgr &FileMgr;
IPOFile *MergedObjFile;
TargetMachine *Target;
bool MergeObjs;
};
/// \breif PostIPO driver for the compiling the entire program without
/// partition.
class PostIPODrvSerial : public PostIPODrvBaseImpl {
public:
PostIPODrvSerial(TargetMachine *T, IPOPartMgr &IPM, IPOFileMgr &IFM,
bool ToMergeObjs) :
PostIPODrvBaseImpl(T, IPM, IFM, ToMergeObjs) {}
virtual bool Compile(std::string &ErrMsg);
virtual IPOFile *getSingleObjFile() const;
private:
Module *getModule() const { return (*PartMgr.begin())->getModule(); }
};
}
// ////////////////////////////////////////////////////////////////////////////
//
// Implemetation of PostIPODriver
//
// ////////////////////////////////////////////////////////////////////////////
//
PostIPODriver::PostIPODriver(VariantTy V, TargetMachine *TM, IPOPartMgr &IPM,
IPOFileMgr &IFM, bool ToMergeObjs) {
if (V == PIDV_SERIAL)
DrvImpl = new PostIPODrvSerial(TM, IPM, IFM, ToMergeObjs);
else
assert(false && "TBD");
}
bool PostIPODriver::Compile(std::string &ErrMsg) {
PostIPODrvBaseImpl *P = static_cast<PostIPODrvBaseImpl *>(DrvImpl);
return P->Compile(ErrMsg);
}
IPOFile *PostIPODriver::getSingleObjFile() const {
PostIPODrvBaseImpl *P = static_cast<PostIPODrvBaseImpl *>(DrvImpl);
return P->getSingleObjFile();
}
// ////////////////////////////////////////////////////////////////////////////
//
// Implemetation of PostIPODrvBaseImpl
//
// ////////////////////////////////////////////////////////////////////////////
//
bool PostIPODrvBaseImpl::PopulatePostIPOOptPM(PassManager &PM) {
(void)PM;
return true;
}
bool PostIPODrvBaseImpl::PopulateCodeGenPM(PassManager &PM,
formatted_raw_ostream &OutFile,
std::string &Err) {
PM.add(new DataLayout(*Target->getDataLayout()));
Target->addAnalysisPasses(PM);
// If the bitcode files contain ARC code and were compiled with optimization,
// the ObjCARCContractPass must be run, so do it unconditionally here.
PM.add(createObjCARCContractPass());
if (Target->addPassesToEmitFile(PM, OutFile,
TargetMachine::CGFT_ObjectFile)) {
Err = "target file type not supported";
return false;
}
return true;
}
// ////////////////////////////////////////////////////////////////////////////
//
// Implemetation of PostIPODrvSerial
//
// ////////////////////////////////////////////////////////////////////////////
//
bool PostIPODrvSerial::Compile(std::string &ErrMsg) {
Module *M = getModule();
// Step 1: Run the post-IPO scalar optimizations
{
PassManager SoptPM;
PopulatePostIPOOptPM(SoptPM);
SoptPM.run(*M);
}
// Step 2: Run the post-IPO machine-specific code-generation passes
{
IPOFile &Obj = (*PartMgr.begin())->getObjFile();
raw_fd_ostream ros(Obj.getPath().c_str(), Obj.getLastErrStr(),
sys::fs::F_Binary);
formatted_raw_ostream OutFile(ros);
PassManager CodGenPM;
if (!PopulateCodeGenPM(CodGenPM, OutFile, ErrMsg)) {
ErrMsg += Obj.getLastErrStr();
return false;
}
CodGenPM.run(*M);
}
return true;
}
IPOFile *PostIPODrvSerial::getSingleObjFile() const {
assert(!MergedObjFile && "No need to *merge* a single object file");
IPOPartition *P = *PartMgr.begin();
return &P->getObjFile();
}

51
tools/lto/LTOPostIPODriver.h
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@ -1,51 +0,0 @@
//===---------- LTOPostIPODriver.h - PostIPO Driver -----------------------===//
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file declare the PostIPODriver class which is the driver for
// Post-IPO compilation phase.
//
//===----------------------------------------------------------------------===//
#ifndef LTO_POSTIPO_DRIVER_H
#define LTO_POSTIPO_DRIVER_H
#include "llvm/Target/TargetMachine.h"
namespace lto {
class IPOPartMgr;
class IPOFileMgr;
class IPOFile;
class PostIPODriver {
public:
typedef enum {
PIDV_Invalid,
PIDV_SERIAL, // No partition
PIDV_MultiThread, // Each partition is compiled by a thread
PIDV_MultiProc, // Each partition is compiled by a process
PIDV_MakeUtil // Partitions compilation is driven by a make-utility
} VariantTy;
PostIPODriver(VariantTy Var, TargetMachine *TM, IPOPartMgr &IPM,
IPOFileMgr &IFM, bool ToMergeObjs = false);
// Return the single resulting object file. If there is no prior
// compilation failure, this function may return NULL iff:
// 1) Partition is enabled, and
// 2) Multiple partitions are generated, and
// 3) It is not asked to merge together the objects corresponding to the
// the partions.
IPOFile *getSingleObjFile() const;
bool Compile(std::string &ErrMsg);
private:
void *DrvImpl;
};
}
#endif // LTO_POSTIPO_DRIVER_H

13
tools/lto/lto.cpp
View File

@ -207,19 +207,6 @@ bool lto_codegen_compile_to_file(lto_code_gen_t cg, const char **name) {
return !cg->compile_to_file(name, sLastErrorString);
}
/// Get intermediate files that need to be removed before linker exit. Upon
/// return, the paths of the files need to be removed is written to "paths". The
/// paths are separated by a single '\0', and the last path is ended by double
/// '\0's. A file could be a directory; in this case, the entire directory needs
/// to be removed recursively.
///
/// It is only necessary to call this function after \p lto_codegen_compile was
/// successfully called.
void
lto_codegen_get_files_need_remove(lto_code_gen_t cg, const char **paths) {
*paths = cg->getFilesNeedToRemove();
}
/// lto_codegen_debug_options - Used to pass extra options to the code
/// generator.
void lto_codegen_debug_options(lto_code_gen_t cg, const char *opt) {

1
tools/lto/lto.exports
View File

@ -20,7 +20,6 @@ lto_codegen_add_must_preserve_symbol
lto_codegen_compile
lto_codegen_create
lto_codegen_dispose
lto_codegen_get_files_need_remove
lto_codegen_set_debug_model
lto_codegen_set_pic_model
lto_codegen_write_merged_modules