//===----------------------------------------------------------------------===//
#include "llvm-c/lto.h"
-#include "llvm-c/Core.h"
-#include "llvm-c/Target.h"
+#include "llvm/ADT/STLExtras.h"
#include "llvm/CodeGen/CommandFlags.h"
+#include "llvm/IR/DiagnosticInfo.h"
+#include "llvm/IR/DiagnosticPrinter.h"
+#include "llvm/IR/LLVMContext.h"
#include "llvm/LTO/LTOCodeGenerator.h"
#include "llvm/LTO/LTOModule.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/Signals.h"
+#include "llvm/Support/TargetSelect.h"
// extra command-line flags needed for LTOCodeGenerator
-static cl::opt<bool>
-DisableOpt("disable-opt", cl::init(false),
- cl::desc("Do not run any optimization passes"));
+static cl::opt<char>
+OptLevel("O",
+ cl::desc("Optimization level. [-O0, -O1, -O2, or -O3] "
+ "(default = '-O2')"),
+ cl::Prefix,
+ cl::ZeroOrMore,
+ cl::init('2'));
static cl::opt<bool>
DisableInline("disable-inlining", cl::init(false),
DisableGVNLoadPRE("disable-gvn-loadpre", cl::init(false),
cl::desc("Do not run the GVN load PRE pass"));
+static cl::opt<bool>
+DisableLTOVectorization("disable-lto-vectorization", cl::init(false),
+ cl::desc("Do not run loop or slp vectorization during LTO"));
+
+#ifdef NDEBUG
+static bool VerifyByDefault = false;
+#else
+static bool VerifyByDefault = true;
+#endif
+
+static cl::opt<bool> DisableVerify(
+ "disable-llvm-verifier", cl::init(!VerifyByDefault),
+ cl::desc("Don't run the LLVM verifier during the optimization pipeline"));
+
// Holds most recent error string.
// *** Not thread safe ***
static std::string sLastErrorString;
// Holds the command-line option parsing state of the LTO module.
static bool parsedOptions = false;
+static LLVMContext *LTOContext = nullptr;
+
+static void diagnosticHandler(const DiagnosticInfo &DI, void *Context) {
+ if (DI.getSeverity() != DS_Error) {
+ DiagnosticPrinterRawOStream DP(errs());
+ DI.print(DP);
+ errs() << '\n';
+ return;
+ }
+ sLastErrorString = "";
+ {
+ raw_string_ostream Stream(sLastErrorString);
+ DiagnosticPrinterRawOStream DP(Stream);
+ DI.print(DP);
+ }
+ sLastErrorString += '\n';
+}
+
// Initialize the configured targets if they have not been initialized.
static void lto_initialize() {
if (!initialized) {
- LLVMInitializeAllTargetInfos();
- LLVMInitializeAllTargets();
- LLVMInitializeAllTargetMCs();
- LLVMInitializeAllAsmParsers();
- LLVMInitializeAllAsmPrinters();
- LLVMInitializeAllDisassemblers();
+#ifdef LLVM_ON_WIN32
+ // Dialog box on crash disabling doesn't work across DLL boundaries, so do
+ // it here.
+ llvm::sys::DisableSystemDialogsOnCrash();
+#endif
+
+ InitializeAllTargetInfos();
+ InitializeAllTargets();
+ InitializeAllTargetMCs();
+ InitializeAllAsmParsers();
+ InitializeAllAsmPrinters();
+ InitializeAllDisassemblers();
+
+ LTOContext = &getGlobalContext();
+ LTOContext->setDiagnosticHandler(diagnosticHandler, nullptr, true);
initialized = true;
}
}
-static void lto_set_target_options(llvm::TargetOptions &Options) {
- Options.LessPreciseFPMADOption = EnableFPMAD;
- Options.NoFramePointerElim = DisableFPElim;
- Options.AllowFPOpFusion = FuseFPOps;
- Options.UnsafeFPMath = EnableUnsafeFPMath;
- Options.NoInfsFPMath = EnableNoInfsFPMath;
- Options.NoNaNsFPMath = EnableNoNaNsFPMath;
- Options.HonorSignDependentRoundingFPMathOption =
- EnableHonorSignDependentRoundingFPMath;
- Options.UseSoftFloat = GenerateSoftFloatCalls;
- if (FloatABIForCalls != llvm::FloatABI::Default)
- Options.FloatABIType = FloatABIForCalls;
- Options.NoZerosInBSS = DontPlaceZerosInBSS;
- Options.GuaranteedTailCallOpt = EnableGuaranteedTailCallOpt;
- Options.DisableTailCalls = DisableTailCalls;
- Options.StackAlignmentOverride = OverrideStackAlignment;
- Options.TrapFuncName = TrapFuncName;
- Options.PositionIndependentExecutable = EnablePIE;
- Options.EnableSegmentedStacks = SegmentedStacks;
- Options.UseInitArray = UseInitArray;
-}
-
-/// lto_get_version - Returns a printable string.
+namespace {
+
+static void handleLibLTODiagnostic(lto_codegen_diagnostic_severity_t Severity,
+ const char *Msg, void *) {
+ sLastErrorString = Msg;
+ sLastErrorString += "\n";
+}
+
+// This derived class owns the native object file. This helps implement the
+// libLTO API semantics, which require that the code generator owns the object
+// file.
+struct LibLTOCodeGenerator : LTOCodeGenerator {
+ LibLTOCodeGenerator() : LTOCodeGenerator(*LTOContext) {
+ setDiagnosticHandler(handleLibLTODiagnostic, nullptr); }
+ LibLTOCodeGenerator(std::unique_ptr<LLVMContext> Context)
+ : LTOCodeGenerator(*Context), OwnedContext(std::move(Context)) {
+ setDiagnosticHandler(handleLibLTODiagnostic, nullptr); }
+
+ // Reset the module first in case MergedModule is created in OwnedContext.
+ // Module must be destructed before its context gets destructed.
+ ~LibLTOCodeGenerator() { resetMergedModule(); }
+
+ std::unique_ptr<MemoryBuffer> NativeObjectFile;
+ std::unique_ptr<LLVMContext> OwnedContext;
+};
+
+}
+
+DEFINE_SIMPLE_CONVERSION_FUNCTIONS(LibLTOCodeGenerator, lto_code_gen_t)
+DEFINE_SIMPLE_CONVERSION_FUNCTIONS(LTOModule, lto_module_t)
+
+// Convert the subtarget features into a string to pass to LTOCodeGenerator.
+static void lto_add_attrs(lto_code_gen_t cg) {
+ LTOCodeGenerator *CG = unwrap(cg);
+ if (MAttrs.size()) {
+ std::string attrs;
+ for (unsigned i = 0; i < MAttrs.size(); ++i) {
+ if (i > 0)
+ attrs.append(",");
+ attrs.append(MAttrs[i]);
+ }
+
+ CG->setAttr(attrs.c_str());
+ }
+
+ if (OptLevel < '0' || OptLevel > '3')
+ report_fatal_error("Optimization level must be between 0 and 3");
+ CG->setOptLevel(OptLevel - '0');
+}
+
extern const char* lto_get_version() {
return LTOCodeGenerator::getVersionString();
}
-/// lto_get_error_message - Returns the last error string or NULL if last
-/// operation was successful.
const char* lto_get_error_message() {
return sLastErrorString.c_str();
}
-/// lto_module_is_object_file - Validates if a file is a loadable object file.
bool lto_module_is_object_file(const char* path) {
return LTOModule::isBitcodeFile(path);
}
-/// lto_module_is_object_file_for_target - Validates if a file is a loadable
-/// object file compilable for requested target.
bool lto_module_is_object_file_for_target(const char* path,
const char* target_triplet_prefix) {
- return LTOModule::isBitcodeFileForTarget(path, target_triplet_prefix);
+ ErrorOr<std::unique_ptr<MemoryBuffer>> Buffer = MemoryBuffer::getFile(path);
+ if (!Buffer)
+ return false;
+ return LTOModule::isBitcodeForTarget(Buffer->get(), target_triplet_prefix);
}
-/// lto_module_is_object_file_in_memory - Validates if a buffer is a loadable
-/// object file.
bool lto_module_is_object_file_in_memory(const void* mem, size_t length) {
return LTOModule::isBitcodeFile(mem, length);
}
-/// lto_module_is_object_file_in_memory_for_target - Validates if a buffer is a
-/// loadable object file compilable for the target.
bool
lto_module_is_object_file_in_memory_for_target(const void* mem,
size_t length,
const char* target_triplet_prefix) {
- return LTOModule::isBitcodeFileForTarget(mem, length, target_triplet_prefix);
+ std::unique_ptr<MemoryBuffer> buffer(LTOModule::makeBuffer(mem, length));
+ if (!buffer)
+ return false;
+ return LTOModule::isBitcodeForTarget(buffer.get(), target_triplet_prefix);
}
-/// lto_module_create - Loads an object file from disk. Returns NULL on error
-/// (check lto_get_error_message() for details).
lto_module_t lto_module_create(const char* path) {
lto_initialize();
- llvm::TargetOptions Options;
- lto_set_target_options(Options);
- return LTOModule::makeLTOModule(path, Options, sLastErrorString);
+ llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
+ ErrorOr<std::unique_ptr<LTOModule>> M =
+ LTOModule::createFromFile(*LTOContext, path, Options);
+ if (!M)
+ return nullptr;
+ return wrap(M->release());
}
-/// lto_module_create_from_fd - Loads an object file from disk. Returns NULL on
-/// error (check lto_get_error_message() for details).
lto_module_t lto_module_create_from_fd(int fd, const char *path, size_t size) {
lto_initialize();
- llvm::TargetOptions Options;
- lto_set_target_options(Options);
- return LTOModule::makeLTOModule(fd, path, size, Options, sLastErrorString);
+ llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
+ ErrorOr<std::unique_ptr<LTOModule>> M =
+ LTOModule::createFromOpenFile(*LTOContext, fd, path, size, Options);
+ if (!M)
+ return nullptr;
+ return wrap(M->release());
}
-/// lto_module_create_from_fd_at_offset - Loads an object file from disk.
-/// Returns NULL on error (check lto_get_error_message() for details).
lto_module_t lto_module_create_from_fd_at_offset(int fd, const char *path,
size_t file_size,
size_t map_size,
off_t offset) {
lto_initialize();
- llvm::TargetOptions Options;
- lto_set_target_options(Options);
- return LTOModule::makeLTOModule(fd, path, map_size, offset, Options,
- sLastErrorString);
+ llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
+ ErrorOr<std::unique_ptr<LTOModule>> M = LTOModule::createFromOpenFileSlice(
+ *LTOContext, fd, path, map_size, offset, Options);
+ if (!M)
+ return nullptr;
+ return wrap(M->release());
}
-/// lto_module_create_from_memory - Loads an object file from memory. Returns
-/// NULL on error (check lto_get_error_message() for details).
lto_module_t lto_module_create_from_memory(const void* mem, size_t length) {
lto_initialize();
- llvm::TargetOptions Options;
- lto_set_target_options(Options);
- return LTOModule::makeLTOModule(mem, length, Options, sLastErrorString);
+ llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
+ ErrorOr<std::unique_ptr<LTOModule>> M =
+ LTOModule::createFromBuffer(*LTOContext, mem, length, Options);
+ if (!M)
+ return nullptr;
+ return wrap(M->release());
}
-/// lto_module_dispose - Frees all memory for a module. Upon return the
-/// lto_module_t is no longer valid.
-void lto_module_dispose(lto_module_t mod) {
- delete mod;
+lto_module_t lto_module_create_from_memory_with_path(const void* mem,
+ size_t length,
+ const char *path) {
+ lto_initialize();
+ llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
+ ErrorOr<std::unique_ptr<LTOModule>> M =
+ LTOModule::createFromBuffer(*LTOContext, mem, length, Options, path);
+ if (!M)
+ return nullptr;
+ return wrap(M->release());
}
-/// lto_module_get_target_triple - Returns triplet string which the object
-/// module was compiled under.
+lto_module_t lto_module_create_in_local_context(const void *mem, size_t length,
+ const char *path) {
+ lto_initialize();
+ llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
+ ErrorOr<std::unique_ptr<LTOModule>> M =
+ LTOModule::createInLocalContext(mem, length, Options, path);
+ if (!M)
+ return nullptr;
+ return wrap(M->release());
+}
+
+lto_module_t lto_module_create_in_codegen_context(const void *mem,
+ size_t length,
+ const char *path,
+ lto_code_gen_t cg) {
+ lto_initialize();
+ llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
+ ErrorOr<std::unique_ptr<LTOModule>> M = LTOModule::createInContext(
+ mem, length, Options, path, &unwrap(cg)->getContext());
+ return wrap(M->release());
+}
+
+void lto_module_dispose(lto_module_t mod) { delete unwrap(mod); }
+
const char* lto_module_get_target_triple(lto_module_t mod) {
- return mod->getTargetTriple();
+ return unwrap(mod)->getTargetTriple().c_str();
}
-/// lto_module_set_target_triple - Sets triple string with which the object will
-/// be codegened.
void lto_module_set_target_triple(lto_module_t mod, const char *triple) {
- return mod->setTargetTriple(triple);
+ return unwrap(mod)->setTargetTriple(triple);
}
-/// lto_module_get_num_symbols - Returns the number of symbols in the object
-/// module.
unsigned int lto_module_get_num_symbols(lto_module_t mod) {
- return mod->getSymbolCount();
+ return unwrap(mod)->getSymbolCount();
}
-/// lto_module_get_symbol_name - Returns the name of the ith symbol in the
-/// object module.
const char* lto_module_get_symbol_name(lto_module_t mod, unsigned int index) {
- return mod->getSymbolName(index);
+ return unwrap(mod)->getSymbolName(index);
}
-/// lto_module_get_symbol_attribute - Returns the attributes of the ith symbol
-/// in the object module.
lto_symbol_attributes lto_module_get_symbol_attribute(lto_module_t mod,
unsigned int index) {
- return mod->getSymbolAttributes(index);
+ return unwrap(mod)->getSymbolAttributes(index);
}
-/// lto_codegen_create - Instantiates a code generator. Returns NULL if there
-/// is an error.
-lto_code_gen_t lto_codegen_create(void) {
+const char* lto_module_get_linkeropts(lto_module_t mod) {
+ return unwrap(mod)->getLinkerOpts();
+}
+
+void lto_codegen_set_diagnostic_handler(lto_code_gen_t cg,
+ lto_diagnostic_handler_t diag_handler,
+ void *ctxt) {
+ unwrap(cg)->setDiagnosticHandler(diag_handler, ctxt);
+}
+
+static lto_code_gen_t createCodeGen(bool InLocalContext) {
lto_initialize();
- TargetOptions Options;
- lto_set_target_options(Options);
+ TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
- LTOCodeGenerator *CodeGen = new LTOCodeGenerator();
- if (CodeGen)
- CodeGen->setTargetOptions(Options);
- return CodeGen;
+ LibLTOCodeGenerator *CodeGen =
+ InLocalContext ? new LibLTOCodeGenerator(make_unique<LLVMContext>())
+ : new LibLTOCodeGenerator();
+ CodeGen->setTargetOptions(Options);
+ return wrap(CodeGen);
}
-/// lto_codegen_dispose - Frees all memory for a code generator. Upon return the
-/// lto_code_gen_t is no longer valid.
-void lto_codegen_dispose(lto_code_gen_t cg) {
- delete cg;
+lto_code_gen_t lto_codegen_create(void) {
+ return createCodeGen(/* InLocalContext */ false);
+}
+
+lto_code_gen_t lto_codegen_create_in_local_context(void) {
+ return createCodeGen(/* InLocalContext */ true);
}
-/// lto_codegen_add_module - Add an object module to the set of modules for
-/// which code will be generated. Returns true on error (check
-/// lto_get_error_message() for details).
+void lto_codegen_dispose(lto_code_gen_t cg) { delete unwrap(cg); }
+
bool lto_codegen_add_module(lto_code_gen_t cg, lto_module_t mod) {
- return !cg->addModule(mod, sLastErrorString);
+ return !unwrap(cg)->addModule(unwrap(mod));
+}
+
+void lto_codegen_set_module(lto_code_gen_t cg, lto_module_t mod) {
+ unwrap(cg)->setModule(std::unique_ptr<LTOModule>(unwrap(mod)));
}
-/// lto_codegen_set_debug_model - Sets what if any format of debug info should
-/// be generated. Returns true on error (check lto_get_error_message() for
-/// details).
bool lto_codegen_set_debug_model(lto_code_gen_t cg, lto_debug_model debug) {
- cg->setDebugInfo(debug);
+ unwrap(cg)->setDebugInfo(debug);
return false;
}
-/// lto_codegen_set_pic_model - Sets what code model to generated. Returns true
-/// on error (check lto_get_error_message() for details).
bool lto_codegen_set_pic_model(lto_code_gen_t cg, lto_codegen_model model) {
- cg->setCodePICModel(model);
- return false;
+ switch (model) {
+ case LTO_CODEGEN_PIC_MODEL_STATIC:
+ unwrap(cg)->setCodePICModel(Reloc::Static);
+ return false;
+ case LTO_CODEGEN_PIC_MODEL_DYNAMIC:
+ unwrap(cg)->setCodePICModel(Reloc::PIC_);
+ return false;
+ case LTO_CODEGEN_PIC_MODEL_DYNAMIC_NO_PIC:
+ unwrap(cg)->setCodePICModel(Reloc::DynamicNoPIC);
+ return false;
+ case LTO_CODEGEN_PIC_MODEL_DEFAULT:
+ unwrap(cg)->setCodePICModel(Reloc::Default);
+ return false;
+ }
+ sLastErrorString = "Unknown PIC model";
+ return true;
}
-/// lto_codegen_set_cpu - Sets the cpu to generate code for.
void lto_codegen_set_cpu(lto_code_gen_t cg, const char *cpu) {
- return cg->setCpu(cpu);
+ return unwrap(cg)->setCpu(cpu);
}
-/// lto_codegen_set_assembler_path - Sets the path to the assembler tool.
void lto_codegen_set_assembler_path(lto_code_gen_t cg, const char *path) {
// In here only for backwards compatibility. We use MC now.
}
-/// lto_codegen_set_assembler_args - Sets extra arguments that libLTO should
-/// pass to the assembler.
void lto_codegen_set_assembler_args(lto_code_gen_t cg, const char **args,
int nargs) {
// In here only for backwards compatibility. We use MC now.
}
-/// lto_codegen_add_must_preserve_symbol - Adds to a list of all global symbols
-/// that must exist in the final generated code. If a function is not listed
-/// there, it might be inlined into every usage and optimized away.
void lto_codegen_add_must_preserve_symbol(lto_code_gen_t cg,
const char *symbol) {
- cg->addMustPreserveSymbol(symbol);
+ unwrap(cg)->addMustPreserveSymbol(symbol);
}
-/// lto_codegen_write_merged_modules - Writes a new file at the specified path
-/// that contains the merged contents of all modules added so far. Returns true
-/// on error (check lto_get_error_message() for details).
-bool lto_codegen_write_merged_modules(lto_code_gen_t cg, const char *path) {
+static void maybeParseOptions(lto_code_gen_t cg) {
if (!parsedOptions) {
- cg->parseCodeGenDebugOptions();
+ unwrap(cg)->parseCodeGenDebugOptions();
+ lto_add_attrs(cg);
parsedOptions = true;
}
- return !cg->writeMergedModules(path, sLastErrorString);
}
-/// lto_codegen_compile - Generates code for all added modules into one native
-/// object file. On success returns a pointer to a generated mach-o/ELF buffer
-/// and length set to the buffer size. The buffer is owned by the lto_code_gen_t
-/// object and will be freed when lto_codegen_dispose() is called, or
-/// lto_codegen_compile() is called again. On failure, returns NULL (check
-/// lto_get_error_message() for details).
+bool lto_codegen_write_merged_modules(lto_code_gen_t cg, const char *path) {
+ maybeParseOptions(cg);
+ return !unwrap(cg)->writeMergedModules(path);
+}
+
const void *lto_codegen_compile(lto_code_gen_t cg, size_t *length) {
- if (!parsedOptions) {
- cg->parseCodeGenDebugOptions();
- parsedOptions = true;
- }
- return cg->compile(length, DisableOpt, DisableInline, DisableGVNLoadPRE,
- sLastErrorString);
+ maybeParseOptions(cg);
+ LibLTOCodeGenerator *CG = unwrap(cg);
+ CG->NativeObjectFile =
+ CG->compile(DisableVerify, DisableInline, DisableGVNLoadPRE,
+ DisableLTOVectorization);
+ if (!CG->NativeObjectFile)
+ return nullptr;
+ *length = CG->NativeObjectFile->getBufferSize();
+ return CG->NativeObjectFile->getBufferStart();
+}
+
+bool lto_codegen_optimize(lto_code_gen_t cg) {
+ maybeParseOptions(cg);
+ return !unwrap(cg)->optimize(DisableVerify, DisableInline, DisableGVNLoadPRE,
+ DisableLTOVectorization);
+}
+
+const void *lto_codegen_compile_optimized(lto_code_gen_t cg, size_t *length) {
+ maybeParseOptions(cg);
+ LibLTOCodeGenerator *CG = unwrap(cg);
+ CG->NativeObjectFile = CG->compileOptimized();
+ if (!CG->NativeObjectFile)
+ return nullptr;
+ *length = CG->NativeObjectFile->getBufferSize();
+ return CG->NativeObjectFile->getBufferStart();
}
-/// lto_codegen_compile_to_file - Generates code for all added modules into one
-/// native object file. The name of the file is written to name. Returns true on
-/// error.
bool lto_codegen_compile_to_file(lto_code_gen_t cg, const char **name) {
- if (!parsedOptions) {
- cg->parseCodeGenDebugOptions();
- parsedOptions = true;
- }
- return !cg->compile_to_file(name, DisableOpt, DisableInline, DisableGVNLoadPRE,
- sLastErrorString);
+ maybeParseOptions(cg);
+ return !unwrap(cg)->compile_to_file(
+ name, DisableVerify, DisableInline, DisableGVNLoadPRE,
+ DisableLTOVectorization);
}
-/// 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) {
- cg->setCodeGenDebugOptions(opt);
+ unwrap(cg)->setCodeGenDebugOptions(opt);
+}
+
+unsigned int lto_api_version() { return LTO_API_VERSION; }
+
+void lto_codegen_set_should_internalize(lto_code_gen_t cg,
+ bool ShouldInternalize) {
+ unwrap(cg)->setShouldInternalize(ShouldInternalize);
+}
+
+void lto_codegen_set_should_embed_uselists(lto_code_gen_t cg,
+ lto_bool_t ShouldEmbedUselists) {
+ unwrap(cg)->setShouldEmbedUselists(ShouldEmbedUselists);
}
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