#include "llvm/Analysis/TargetLibraryInfo.h"
#include "llvm/Analysis/TargetTransformInfo.h"
#include "llvm/Bitcode/ReaderWriter.h"
+#include "llvm/CodeGen/ParallelCG.h"
#include "llvm/CodeGen/RuntimeLibcalls.h"
#include "llvm/Config/config.h"
#include "llvm/IR/Constants.h"
}
LTOCodeGenerator::LTOCodeGenerator()
- : Context(getGlobalContext()), IRLinker(new Module("ld-temp.o", Context)) {
+ : Context(getGlobalContext()),
+ MergedModule(new Module("ld-temp.o", Context)),
+ IRLinker(MergedModule.get()) {
initializeLTOPasses();
}
LTOCodeGenerator::LTOCodeGenerator(std::unique_ptr<LLVMContext> Context)
: OwnedContext(std::move(Context)), Context(*OwnedContext),
- IRLinker(new Module("ld-temp.o", *OwnedContext)) {
+ MergedModule(new Module("ld-temp.o", *OwnedContext)),
+ IRLinker(MergedModule.get()) {
initializeLTOPasses();
}
-void LTOCodeGenerator::destroyMergedModule() {
- if (OwnedModule) {
- assert(IRLinker.getModule() == &OwnedModule->getModule() &&
- "The linker's module should be the same as the owned module");
- delete OwnedModule;
- OwnedModule = nullptr;
- } else if (IRLinker.getModule())
- IRLinker.deleteModule();
-}
-
-LTOCodeGenerator::~LTOCodeGenerator() {
- destroyMergedModule();
-}
+LTOCodeGenerator::~LTOCodeGenerator() {}
-// Initialize LTO passes. Please keep this funciton in sync with
+// Initialize LTO passes. Please keep this function in sync with
// PassManagerBuilder::populateLTOPassManager(), and make sure all LTO
// passes are initialized.
void LTOCodeGenerator::initializeLTOPasses() {
initializeCFGSimplifyPassPass(R);
}
-bool LTOCodeGenerator::addModule(LTOModule *mod) {
- assert(&mod->getModule().getContext() == &Context &&
+bool LTOCodeGenerator::addModule(LTOModule *Mod) {
+ assert(&Mod->getModule().getContext() == &Context &&
"Expected module in same context");
- bool ret = IRLinker.linkInModule(&mod->getModule());
+ bool ret = IRLinker.linkInModule(&Mod->getModule());
- const std::vector<const char*> &undefs = mod->getAsmUndefinedRefs();
+ const std::vector<const char *> &undefs = Mod->getAsmUndefinedRefs();
for (int i = 0, e = undefs.size(); i != e; ++i)
AsmUndefinedRefs[undefs[i]] = 1;
return !ret;
}
-void LTOCodeGenerator::setModule(LTOModule *Mod) {
+void LTOCodeGenerator::setModule(std::unique_ptr<LTOModule> Mod) {
assert(&Mod->getModule().getContext() == &Context &&
"Expected module in same context");
- // Delete the old merged module.
- destroyMergedModule();
AsmUndefinedRefs.clear();
- OwnedModule = Mod;
- IRLinker.setModule(&Mod->getModule());
+ MergedModule = Mod->takeModule();
+ IRLinker.setModule(MergedModule.get());
const std::vector<const char*> &Undefs = Mod->getAsmUndefinedRefs();
for (int I = 0, E = Undefs.size(); I != E; ++I)
AsmUndefinedRefs[Undefs[I]] = 1;
}
-void LTOCodeGenerator::setTargetOptions(TargetOptions options) {
- Options = options;
+void LTOCodeGenerator::setTargetOptions(TargetOptions Options) {
+ this->Options = Options;
}
-void LTOCodeGenerator::setDebugInfo(lto_debug_model debug) {
- switch (debug) {
+void LTOCodeGenerator::setDebugInfo(lto_debug_model Debug) {
+ switch (Debug) {
case LTO_DEBUG_MODEL_NONE:
EmitDwarfDebugInfo = false;
return;
llvm_unreachable("Unknown debug format!");
}
-bool LTOCodeGenerator::writeMergedModules(const char *path,
- std::string &errMsg) {
- if (!determineTarget(errMsg))
+void LTOCodeGenerator::setOptLevel(unsigned Level) {
+ OptLevel = Level;
+ switch (OptLevel) {
+ case 0:
+ CGOptLevel = CodeGenOpt::None;
+ break;
+ case 1:
+ CGOptLevel = CodeGenOpt::Less;
+ break;
+ case 2:
+ CGOptLevel = CodeGenOpt::Default;
+ break;
+ case 3:
+ CGOptLevel = CodeGenOpt::Aggressive;
+ break;
+ }
+}
+
+bool LTOCodeGenerator::writeMergedModules(const char *Path,
+ std::string &ErrMsg) {
+ if (!determineTarget(ErrMsg))
return false;
// mark which symbols can not be internalized
// create output file
std::error_code EC;
- tool_output_file Out(path, EC, sys::fs::F_None);
+ tool_output_file Out(Path, EC, sys::fs::F_None);
if (EC) {
- errMsg = "could not open bitcode file for writing: ";
- errMsg += path;
+ ErrMsg = "could not open bitcode file for writing: ";
+ ErrMsg += Path;
return false;
}
// write bitcode to it
- WriteBitcodeToFile(IRLinker.getModule(), Out.os(), ShouldEmbedUselists);
+ WriteBitcodeToFile(MergedModule.get(), Out.os(), ShouldEmbedUselists);
Out.os().close();
if (Out.os().has_error()) {
- errMsg = "could not write bitcode file: ";
- errMsg += path;
+ ErrMsg = "could not write bitcode file: ";
+ ErrMsg += Path;
Out.os().clear_error();
return false;
}
return true;
}
-bool LTOCodeGenerator::compileOptimizedToFile(const char **name,
- std::string &errMsg) {
+bool LTOCodeGenerator::compileOptimizedToFile(const char **Name,
+ std::string &ErrMsg) {
// make unique temp .o file to put generated object file
SmallString<128> Filename;
int FD;
std::error_code EC =
sys::fs::createTemporaryFile("lto-llvm", "o", FD, Filename);
if (EC) {
- errMsg = EC.message();
+ ErrMsg = EC.message();
return false;
}
// generate object file
tool_output_file objFile(Filename.c_str(), FD);
- bool genResult = compileOptimized(objFile.os(), errMsg);
+ bool genResult = compileOptimized(&objFile.os(), ErrMsg);
objFile.os().close();
if (objFile.os().has_error()) {
objFile.os().clear_error();
}
NativeObjectPath = Filename.c_str();
- *name = NativeObjectPath.c_str();
+ *Name = NativeObjectPath.c_str();
return true;
}
std::unique_ptr<MemoryBuffer>
-LTOCodeGenerator::compileOptimized(std::string &errMsg) {
+LTOCodeGenerator::compileOptimized(std::string &ErrMsg) {
const char *name;
- if (!compileOptimizedToFile(&name, errMsg))
+ if (!compileOptimizedToFile(&name, ErrMsg))
return nullptr;
// read .o file into memory buffer
ErrorOr<std::unique_ptr<MemoryBuffer>> BufferOrErr =
MemoryBuffer::getFile(name, -1, false);
if (std::error_code EC = BufferOrErr.getError()) {
- errMsg = EC.message();
+ ErrMsg = EC.message();
sys::fs::remove(NativeObjectPath);
return nullptr;
}
return std::move(*BufferOrErr);
}
-
-bool LTOCodeGenerator::compile_to_file(const char **name,
- bool disableInline,
- bool disableGVNLoadPRE,
- bool disableVectorization,
- std::string &errMsg) {
- if (!optimize(disableInline, disableGVNLoadPRE,
- disableVectorization, errMsg))
+bool LTOCodeGenerator::compile_to_file(const char **Name, bool DisableInline,
+ bool DisableGVNLoadPRE,
+ bool DisableVectorization,
+ std::string &ErrMsg) {
+ if (!optimize(DisableInline, DisableGVNLoadPRE, DisableVectorization, ErrMsg))
return false;
- return compileOptimizedToFile(name, errMsg);
+ return compileOptimizedToFile(Name, ErrMsg);
}
std::unique_ptr<MemoryBuffer>
-LTOCodeGenerator::compile(bool disableInline, bool disableGVNLoadPRE,
- bool disableVectorization, std::string &errMsg) {
- if (!optimize(disableInline, disableGVNLoadPRE,
- disableVectorization, errMsg))
+LTOCodeGenerator::compile(bool DisableInline, bool DisableGVNLoadPRE,
+ bool DisableVectorization, std::string &ErrMsg) {
+ if (!optimize(DisableInline, DisableGVNLoadPRE, DisableVectorization, ErrMsg))
return nullptr;
- return compileOptimized(errMsg);
+ return compileOptimized(ErrMsg);
}
-bool LTOCodeGenerator::determineTarget(std::string &errMsg) {
+bool LTOCodeGenerator::determineTarget(std::string &ErrMsg) {
if (TargetMach)
return true;
- std::string TripleStr = IRLinker.getModule()->getTargetTriple();
- if (TripleStr.empty())
+ std::string TripleStr = MergedModule->getTargetTriple();
+ if (TripleStr.empty()) {
TripleStr = sys::getDefaultTargetTriple();
+ MergedModule->setTargetTriple(TripleStr);
+ }
llvm::Triple Triple(TripleStr);
// create target machine from info for merged modules
- const Target *march = TargetRegistry::lookupTarget(TripleStr, errMsg);
+ const Target *march = TargetRegistry::lookupTarget(TripleStr, ErrMsg);
if (!march)
return false;
// the default set of features.
SubtargetFeatures Features(MAttr);
Features.getDefaultSubtargetFeatures(Triple);
- std::string FeatureStr = Features.getString();
+ FeatureStr = Features.getString();
// Set a default CPU for Darwin triples.
if (MCpu.empty() && Triple.isOSDarwin()) {
if (Triple.getArch() == llvm::Triple::x86_64)
MCpu = "cyclone";
}
- CodeGenOpt::Level CGOptLevel;
- switch (OptLevel) {
- case 0:
- CGOptLevel = CodeGenOpt::None;
- break;
- case 1:
- CGOptLevel = CodeGenOpt::Less;
- break;
- case 2:
- CGOptLevel = CodeGenOpt::Default;
- break;
- case 3:
- CGOptLevel = CodeGenOpt::Aggressive;
- break;
- }
-
TargetMach.reset(march->createTargetMachine(TripleStr, MCpu, FeatureStr,
Options, RelocModel,
CodeModel::Default, CGOptLevel));
void LTOCodeGenerator::applyScopeRestrictions() {
if (ScopeRestrictionsDone || !ShouldInternalize)
return;
- Module *mergedModule = IRLinker.getModule();
// Start off with a verification pass.
legacy::PassManager passes;
TargetLibraryInfoImpl TLII(Triple(TargetMach->getTargetTriple()));
TargetLibraryInfo TLI(TLII);
- accumulateAndSortLibcalls(Libcalls, TLI, *mergedModule, *TargetMach);
+ accumulateAndSortLibcalls(Libcalls, TLI, *MergedModule, *TargetMach);
- for (Module::iterator f = mergedModule->begin(),
- e = mergedModule->end(); f != e; ++f)
- applyRestriction(*f, Libcalls, MustPreserveList, AsmUsed, Mangler);
- for (Module::global_iterator v = mergedModule->global_begin(),
- e = mergedModule->global_end(); v != e; ++v)
- applyRestriction(*v, Libcalls, MustPreserveList, AsmUsed, Mangler);
- for (Module::alias_iterator a = mergedModule->alias_begin(),
- e = mergedModule->alias_end(); a != e; ++a)
- applyRestriction(*a, Libcalls, MustPreserveList, AsmUsed, Mangler);
+ for (Function &f : *MergedModule)
+ applyRestriction(f, Libcalls, MustPreserveList, AsmUsed, Mangler);
+ for (GlobalVariable &v : MergedModule->globals())
+ applyRestriction(v, Libcalls, MustPreserveList, AsmUsed, Mangler);
+ for (GlobalAlias &a : MergedModule->aliases())
+ applyRestriction(a, Libcalls, MustPreserveList, AsmUsed, Mangler);
GlobalVariable *LLVMCompilerUsed =
- mergedModule->getGlobalVariable("llvm.compiler.used");
+ MergedModule->getGlobalVariable("llvm.compiler.used");
findUsedValues(LLVMCompilerUsed, AsmUsed);
if (LLVMCompilerUsed)
LLVMCompilerUsed->eraseFromParent();
llvm::ArrayType *ATy = llvm::ArrayType::get(i8PTy, asmUsed2.size());
LLVMCompilerUsed =
- new llvm::GlobalVariable(*mergedModule, ATy, false,
+ new llvm::GlobalVariable(*MergedModule, ATy, false,
llvm::GlobalValue::AppendingLinkage,
llvm::ConstantArray::get(ATy, asmUsed2),
"llvm.compiler.used");
passes.add(createInternalizePass(MustPreserveList));
// apply scope restrictions
- passes.run(*mergedModule);
+ passes.run(*MergedModule);
ScopeRestrictionsDone = true;
}
/// Optimize merged modules using various IPO passes
-bool LTOCodeGenerator::optimize(bool DisableInline,
- bool DisableGVNLoadPRE,
+bool LTOCodeGenerator::optimize(bool DisableInline, bool DisableGVNLoadPRE,
bool DisableVectorization,
- std::string &errMsg) {
- if (!this->determineTarget(errMsg))
+ std::string &ErrMsg) {
+ if (!this->determineTarget(ErrMsg))
return false;
- Module *mergedModule = IRLinker.getModule();
-
// Mark which symbols can not be internalized
this->applyScopeRestrictions();
legacy::PassManager passes;
// Add an appropriate DataLayout instance for this module...
- mergedModule->setDataLayout(TargetMach->createDataLayout());
+ MergedModule->setDataLayout(TargetMach->createDataLayout());
passes.add(
createTargetTransformInfoWrapperPass(TargetMach->getTargetIRAnalysis()));
PMB.populateLTOPassManager(passes);
// Run our queue of passes all at once now, efficiently.
- passes.run(*mergedModule);
+ passes.run(*MergedModule);
return true;
}
-bool LTOCodeGenerator::compileOptimized(raw_pwrite_stream &out,
- std::string &errMsg) {
- if (!this->determineTarget(errMsg))
+bool LTOCodeGenerator::compileOptimized(ArrayRef<raw_pwrite_stream *> Out,
+ std::string &ErrMsg) {
+ if (!this->determineTarget(ErrMsg))
return false;
- Module *mergedModule = IRLinker.getModule();
-
- legacy::PassManager codeGenPasses;
+ legacy::PassManager preCodeGenPasses;
// If the bitcode files contain ARC code and were compiled with optimization,
// the ObjCARCContractPass must be run, so do it unconditionally here.
- codeGenPasses.add(createObjCARCContractPass());
-
- if (TargetMach->addPassesToEmitFile(codeGenPasses, out,
- TargetMachine::CGFT_ObjectFile)) {
- errMsg = "target file type not supported";
- return false;
- }
-
- // Run the code generator, and write assembly file
- codeGenPasses.run(*mergedModule);
+ preCodeGenPasses.add(createObjCARCContractPass());
+ preCodeGenPasses.run(*MergedModule);
+
+ // Do code generation. We need to preserve the module in case the client calls
+ // writeMergedModules() after compilation, but we only need to allow this at
+ // parallelism level 1. This is achieved by having splitCodeGen return the
+ // original module at parallelism level 1 which we then assign back to
+ // MergedModule.
+ MergedModule =
+ splitCodeGen(std::move(MergedModule), Out, MCpu, FeatureStr, Options,
+ RelocModel, CodeModel::Default, CGOptLevel);
return true;
}
/// setCodeGenDebugOptions - Set codegen debugging options to aid in debugging
/// LTO problems.
-void LTOCodeGenerator::setCodeGenDebugOptions(const char *options) {
- for (std::pair<StringRef, StringRef> o = getToken(options);
- !o.first.empty(); o = getToken(o.second))
+void LTOCodeGenerator::setCodeGenDebugOptions(const char *Options) {
+ for (std::pair<StringRef, StringRef> o = getToken(Options); !o.first.empty();
+ o = getToken(o.second))
CodegenOptions.push_back(o.first);
}
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