#include "llvm/LTO/LTOCodeGenerator.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Analysis/Passes.h"
+#include "llvm/Analysis/TargetLibraryInfo.h"
+#include "llvm/Analysis/TargetTransformInfo.h"
#include "llvm/Bitcode/ReaderWriter.h"
#include "llvm/CodeGen/RuntimeLibcalls.h"
#include "llvm/Config/config.h"
#include "llvm/IR/DiagnosticInfo.h"
#include "llvm/IR/DiagnosticPrinter.h"
#include "llvm/IR/LLVMContext.h"
+#include "llvm/IR/LegacyPassManager.h"
#include "llvm/IR/Mangler.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/Verifier.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/SubtargetFeature.h"
-#include "llvm/PassManager.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/FileSystem.h"
-#include "llvm/Support/FormattedStream.h"
#include "llvm/Support/Host.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/Signals.h"
#include "llvm/Support/TargetSelect.h"
#include "llvm/Support/ToolOutputFile.h"
#include "llvm/Support/raw_ostream.h"
-#include "llvm/Target/TargetLibraryInfo.h"
#include "llvm/Target/TargetLowering.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Target/TargetRegisterInfo.h"
}
LTOCodeGenerator::LTOCodeGenerator()
- : Context(getGlobalContext()), IRLinker(new Module("ld-temp.o", Context)),
- TargetMach(nullptr), EmitDwarfDebugInfo(false),
- ScopeRestrictionsDone(false), CodeModel(LTO_CODEGEN_PIC_MODEL_DEFAULT),
- NativeObjectFile(nullptr), DiagHandler(nullptr), DiagContext(nullptr) {
+ : Context(getGlobalContext()), IRLinker(new Module("ld-temp.o", Context)) {
initializeLTOPasses();
}
+LTOCodeGenerator::LTOCodeGenerator(std::unique_ptr<LLVMContext> Context)
+ : OwnedContext(std::move(Context)), Context(*OwnedContext),
+ IRLinker(new Module("ld-temp.o", *OwnedContext)) {
+ 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();
+
delete TargetMach;
- delete NativeObjectFile;
TargetMach = nullptr;
- NativeObjectFile = nullptr;
-
- IRLinker.deleteModule();
for (std::vector<char *>::iterator I = CodegenOptions.begin(),
E = CodegenOptions.end();
initializeGlobalOptPass(R);
initializeConstantMergePass(R);
initializeDAHPass(R);
- initializeInstCombinerPass(R);
+ initializeInstructionCombiningPassPass(R);
initializeSimpleInlinerPass(R);
initializePruneEHPass(R);
initializeGlobalDCEPass(R);
initializeCFGSimplifyPassPass(R);
}
-bool LTOCodeGenerator::addModule(LTOModule* mod, std::string& errMsg) {
- bool ret = IRLinker.linkInModule(&mod->getModule(), &errMsg);
+bool LTOCodeGenerator::addModule(LTOModule *mod) {
+ assert(&mod->getModule().getContext() == &Context &&
+ "Expected module in same context");
+
+ bool ret = IRLinker.linkInModule(&mod->getModule());
const std::vector<const char*> &undefs = mod->getAsmUndefinedRefs();
for (int i = 0, e = undefs.size(); i != e; ++i)
return !ret;
}
+void LTOCodeGenerator::setModule(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());
+
+ 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;
}
applyScopeRestrictions();
// create output file
- std::string ErrInfo;
- tool_output_file Out(path, ErrInfo, sys::fs::F_None);
- if (!ErrInfo.empty()) {
+ std::error_code EC;
+ tool_output_file Out(path, EC, sys::fs::F_None);
+ if (EC) {
errMsg = "could not open bitcode file for writing: ";
errMsg += path;
return false;
}
// write bitcode to it
- WriteBitcodeToFile(IRLinker.getModule(), Out.os());
+ WriteBitcodeToFile(IRLinker.getModule(), Out.os(), ShouldEmbedUselists);
Out.os().close();
if (Out.os().has_error()) {
return true;
}
-bool LTOCodeGenerator::compile_to_file(const char** name,
- bool disableOpt,
- bool disableInline,
- bool disableGVNLoadPRE,
- 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;
// generate object file
tool_output_file objFile(Filename.c_str(), FD);
- bool genResult = generateObjectFile(objFile.os(), disableOpt, disableInline,
- disableGVNLoadPRE, errMsg);
+ bool genResult = compileOptimized(objFile.os(), errMsg);
objFile.os().close();
if (objFile.os().has_error()) {
objFile.os().clear_error();
return true;
}
-const void* LTOCodeGenerator::compile(size_t* length,
- bool disableOpt,
- bool disableInline,
- bool disableGVNLoadPRE,
- std::string& errMsg) {
+std::unique_ptr<MemoryBuffer>
+LTOCodeGenerator::compileOptimized(std::string &errMsg) {
const char *name;
- if (!compile_to_file(&name, disableOpt, disableInline, disableGVNLoadPRE,
- errMsg))
+ if (!compileOptimizedToFile(&name, errMsg))
return nullptr;
- // remove old buffer if compile() called twice
- delete NativeObjectFile;
-
// read .o file into memory buffer
ErrorOr<std::unique_ptr<MemoryBuffer>> BufferOrErr =
MemoryBuffer::getFile(name, -1, false);
sys::fs::remove(NativeObjectPath);
return nullptr;
}
- NativeObjectFile = BufferOrErr.get().release();
// remove temp files
sys::fs::remove(NativeObjectPath);
- // return buffer, unless error
- if (!NativeObjectFile)
+ 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))
+ return false;
+
+ 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))
return nullptr;
- *length = NativeObjectFile->getBufferSize();
- return NativeObjectFile->getBufferStart();
+
+ return compileOptimized(errMsg);
}
bool LTOCodeGenerator::determineTarget(std::string &errMsg) {
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 = march->createTargetMachine(TripleStr, MCpu, FeatureStr, Options,
RelocModel, CodeModel::Default,
- CodeGenOpt::Aggressive);
+ CGOptLevel);
return true;
}
void LTOCodeGenerator::
applyRestriction(GlobalValue &GV,
- const ArrayRef<StringRef> &Libcalls,
+ ArrayRef<StringRef> Libcalls,
std::vector<const char*> &MustPreserveList,
SmallPtrSetImpl<GlobalValue*> &AsmUsed,
Mangler &Mangler) {
UsedValues.insert(GV);
}
+// Collect names of runtime library functions. User-defined functions with the
+// same names are added to llvm.compiler.used to prevent them from being
+// deleted by optimizations.
static void accumulateAndSortLibcalls(std::vector<StringRef> &Libcalls,
const TargetLibraryInfo& TLI,
- const TargetLowering *Lowering)
-{
+ const Module &Mod,
+ const TargetMachine &TM) {
// TargetLibraryInfo has info on C runtime library calls on the current
// target.
for (unsigned I = 0, E = static_cast<unsigned>(LibFunc::NumLibFuncs);
Libcalls.push_back(TLI.getName(F));
}
- // TargetLowering has info on library calls that CodeGen expects to be
- // available, both from the C runtime and compiler-rt.
- if (Lowering)
- for (unsigned I = 0, E = static_cast<unsigned>(RTLIB::UNKNOWN_LIBCALL);
- I != E; ++I)
- if (const char *Name
- = Lowering->getLibcallName(static_cast<RTLIB::Libcall>(I)))
- Libcalls.push_back(Name);
+ SmallPtrSet<const TargetLowering *, 1> TLSet;
+
+ for (const Function &F : Mod) {
+ const TargetLowering *Lowering =
+ TM.getSubtargetImpl(F)->getTargetLowering();
+
+ if (Lowering && TLSet.insert(Lowering).second)
+ // TargetLowering has info on library calls that CodeGen expects to be
+ // available, both from the C runtime and compiler-rt.
+ for (unsigned I = 0, E = static_cast<unsigned>(RTLIB::UNKNOWN_LIBCALL);
+ I != E; ++I)
+ if (const char *Name =
+ Lowering->getLibcallName(static_cast<RTLIB::Libcall>(I)))
+ Libcalls.push_back(Name);
+ }
array_pod_sort(Libcalls.begin(), Libcalls.end());
Libcalls.erase(std::unique(Libcalls.begin(), Libcalls.end()),
}
void LTOCodeGenerator::applyScopeRestrictions() {
- if (ScopeRestrictionsDone)
+ if (ScopeRestrictionsDone || !ShouldInternalize)
return;
Module *mergedModule = IRLinker.getModule();
// Start off with a verification pass.
- PassManager passes;
+ legacy::PassManager passes;
passes.add(createVerifierPass());
- passes.add(createDebugInfoVerifierPass());
// mark which symbols can not be internalized
- Mangler Mangler(TargetMach->getSubtargetImpl()->getDataLayout());
+ Mangler Mangler;
std::vector<const char*> MustPreserveList;
SmallPtrSet<GlobalValue*, 8> AsmUsed;
std::vector<StringRef> Libcalls;
- TargetLibraryInfo TLI(Triple(TargetMach->getTargetTriple()));
- accumulateAndSortLibcalls(
- Libcalls, TLI, TargetMach->getSubtargetImpl()->getTargetLowering());
+ TargetLibraryInfoImpl TLII(Triple(TargetMach->getTargetTriple()));
+ TargetLibraryInfo TLI(TLII);
+
+ accumulateAndSortLibcalls(Libcalls, TLI, *mergedModule, *TargetMach);
for (Module::iterator f = mergedModule->begin(),
e = mergedModule->end(); f != e; ++f)
}
/// Optimize merged modules using various IPO passes
-bool LTOCodeGenerator::generateObjectFile(raw_ostream &out,
- bool DisableOpt,
- bool DisableInline,
- bool DisableGVNLoadPRE,
- std::string &errMsg) {
+bool LTOCodeGenerator::optimize(bool DisableInline,
+ bool DisableGVNLoadPRE,
+ bool DisableVectorization,
+ std::string &errMsg) {
if (!this->determineTarget(errMsg))
return false;
this->applyScopeRestrictions();
// Instantiate the pass manager to organize the passes.
- PassManager passes;
-
- // Start off with a verification pass.
- passes.add(createVerifierPass());
- passes.add(createDebugInfoVerifierPass());
+ legacy::PassManager passes;
// Add an appropriate DataLayout instance for this module...
- mergedModule->setDataLayout(TargetMach->getSubtargetImpl()->getDataLayout());
- passes.add(new DataLayoutPass(mergedModule));
+ mergedModule->setDataLayout(*TargetMach->getDataLayout());
- // Add appropriate TargetLibraryInfo for this module.
- passes.add(new TargetLibraryInfo(Triple(TargetMach->getTargetTriple())));
+ passes.add(
+ createTargetTransformInfoWrapperPass(TargetMach->getTargetIRAnalysis()));
- TargetMach->addAnalysisPasses(passes);
+ Triple TargetTriple(TargetMach->getTargetTriple());
+ PassManagerBuilder PMB;
+ PMB.DisableGVNLoadPRE = DisableGVNLoadPRE;
+ PMB.LoopVectorize = !DisableVectorization;
+ PMB.SLPVectorize = !DisableVectorization;
+ if (!DisableInline)
+ PMB.Inliner = createFunctionInliningPass();
+ PMB.LibraryInfo = new TargetLibraryInfoImpl(TargetTriple);
+ PMB.OptLevel = OptLevel;
+ PMB.VerifyInput = true;
+ PMB.VerifyOutput = true;
- // 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 PMB;
- PMB.DisableGVNLoadPRE = DisableGVNLoadPRE;
- PMB.populateLTOPassManager(passes, !DisableInline);
- }
+ PMB.populateLTOPassManager(passes);
- // Make sure everything is still good.
- passes.add(createVerifierPass());
- passes.add(createDebugInfoVerifierPass());
+ // Run our queue of passes all at once now, efficiently.
+ passes.run(*mergedModule);
- PassManager codeGenPasses;
+ return true;
+}
- codeGenPasses.add(new DataLayoutPass(mergedModule));
+bool LTOCodeGenerator::compileOptimized(raw_pwrite_stream &out,
+ std::string &errMsg) {
+ if (!this->determineTarget(errMsg))
+ return false;
+
+ Module *mergedModule = IRLinker.getModule();
- formatted_raw_ostream Out(out);
+ legacy::PassManager codeGenPasses;
// 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,
+ if (TargetMach->addPassesToEmitFile(codeGenPasses, out,
TargetMachine::CGFT_ObjectFile)) {
errMsg = "target file type not supported";
return false;
}
- // Run our queue of passes all at once now, efficiently.
- passes.run(*mergedModule);
-
// Run the code generator, and write assembly file
codeGenPasses.run(*mergedModule);
return Context.setDiagnosticHandler(nullptr, nullptr);
// Register the LTOCodeGenerator stub in the LLVMContext to forward the
// diagnostic to the external DiagHandler.
- Context.setDiagnosticHandler(LTOCodeGenerator::DiagnosticHandler, this);
+ Context.setDiagnosticHandler(LTOCodeGenerator::DiagnosticHandler, this,
+ /* RespectFilters */ true);
}
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