//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
-//
+//
//===----------------------------------------------------------------------===//
//
-// This file implements the Link Time Optimization library. This library is
+// This file implements the Link Time Optimization library. This library is
// intended to be used by linker to optimize code at link time.
//
//===----------------------------------------------------------------------===//
#include "llvm-c/lto.h"
-
-#include "LTOModule.h"
-#include "LTOCodeGenerator.h"
-
-
-// holds most recent error string
-// *** not thread safe ***
+#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<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),
+ cl::desc("Do not run the inliner pass"));
+
+static cl::opt<bool>
+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 initialization state of the LTO module.
+// *** Not thread safe ***
+static bool initialized = false;
+
+// 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';
+}
-
-//
-// returns a printable string
-//
-extern const char* lto_get_version()
-{
- return LTOCodeGenerator::getVersionString();
+// Initialize the configured targets if they have not been initialized.
+static void lto_initialize() {
+ if (!initialized) {
+#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;
+ }
}
-//
-// returns the last error string or NULL if last operation was successful
-//
-const char* lto_get_error_message()
-{
- return sLastErrorString.c_str();
+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;
+};
-//
-// validates if a file is a loadable object file
-//
-bool lto_module_is_object_file(const char* path)
-{
- return LTOModule::isBitcodeFile(path);
}
+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');
+}
-//
-// 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);
+extern const char* lto_get_version() {
+ return LTOCodeGenerator::getVersionString();
}
+const char* lto_get_error_message() {
+ return sLastErrorString.c_str();
+}
-//
-// 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);
+bool lto_module_is_object_file(const char* path) {
+ return LTOModule::isBitcodeFile(path);
}
+bool lto_module_is_object_file_for_target(const char* path,
+ const char* target_triplet_prefix) {
+ ErrorOr<std::unique_ptr<MemoryBuffer>> Buffer = MemoryBuffer::getFile(path);
+ if (!Buffer)
+ return false;
+ return LTOModule::isBitcodeForTarget(Buffer->get(), target_triplet_prefix);
+}
-//
-// 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);
+bool lto_module_is_object_file_in_memory(const void* mem, size_t length) {
+ return LTOModule::isBitcodeFile(mem, length);
}
+bool
+lto_module_is_object_file_in_memory_for_target(const void* mem,
+ size_t length,
+ const char* 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_t lto_module_create(const char* path) {
+ lto_initialize();
+ llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
+ ErrorOr<std::unique_ptr<LTOModule>> M =
+ LTOModule::createFromFile(*LTOContext, path, Options);
+ if (!M)
+ return nullptr;
+ return wrap(M->release());
+}
-//
-// 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)
-{
- return LTOModule::makeLTOModule(path, sLastErrorString);
+lto_module_t lto_module_create_from_fd(int fd, const char *path, size_t size) {
+ lto_initialize();
+ 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_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 = InitTargetOptionsFromCodeGenFlags();
+ ErrorOr<std::unique_ptr<LTOModule>> M = LTOModule::createFromOpenFileSlice(
+ *LTOContext, fd, path, map_size, offset, Options);
+ if (!M)
+ return nullptr;
+ return wrap(M->release());
+}
-//
-// 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)
-{
- return LTOModule::makeLTOModule(mem, length, sLastErrorString);
+lto_module_t lto_module_create_from_memory(const void* mem, size_t length) {
+ lto_initialize();
+ 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_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());
+}
-//
-// 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_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());
+}
-//
-// returns triplet string which the object module was compiled under
-//
-const char* lto_module_get_target_triple(lto_module_t mod)
-{
- return mod->getTargetTriple();
+void lto_module_dispose(lto_module_t mod) { delete unwrap(mod); }
+
+const char* lto_module_get_target_triple(lto_module_t mod) {
+ return unwrap(mod)->getTargetTriple().c_str();
}
+void lto_module_set_target_triple(lto_module_t mod, const char *triple) {
+ return unwrap(mod)->setTargetTriple(triple);
+}
-//
-// returns the number of symbols in the object module
-//
-uint32_t lto_module_get_num_symbols(lto_module_t mod)
-{
- return mod->getSymbolCount();
+unsigned int lto_module_get_num_symbols(lto_module_t mod) {
+ return unwrap(mod)->getSymbolCount();
}
-//
-// returns the name of the ith symbol in the object module
-//
-const char* lto_module_get_symbol_name(lto_module_t mod, uint32_t index)
-{
- return mod->getSymbolName(index);
+const char* lto_module_get_symbol_name(lto_module_t mod, unsigned int index) {
+ return unwrap(mod)->getSymbolName(index);
}
+lto_symbol_attributes lto_module_get_symbol_attribute(lto_module_t mod,
+ unsigned int index) {
+ return unwrap(mod)->getSymbolAttributes(index);
+}
-//
-// returns the attributes of the ith symbol in the object module
-//
-lto_symbol_attributes lto_module_get_symbol_attribute(lto_module_t mod,
- uint32_t index)
-{
- return mod->getSymbolAttributes(index);
+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 = InitTargetOptionsFromCodeGenFlags();
+ LibLTOCodeGenerator *CodeGen =
+ InLocalContext ? new LibLTOCodeGenerator(make_unique<LLVMContext>())
+ : new LibLTOCodeGenerator();
+ CodeGen->setTargetOptions(Options);
+ return wrap(CodeGen);
+}
-//
-// instantiates a code generator
-// returns NULL if there is an error
-//
-lto_code_gen_t lto_codegen_create()
-{
- return new LTOCodeGenerator();
+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);
+}
+void lto_codegen_dispose(lto_code_gen_t cg) { delete unwrap(cg); }
-//
-// 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;
+bool lto_codegen_add_module(lto_code_gen_t cg, lto_module_t mod) {
+ 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)));
+}
-
-//
-// 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)
-//
-bool lto_codegen_add_module(lto_code_gen_t cg, lto_module_t mod)
-{
- return cg->addModule(mod, sLastErrorString);
+bool lto_codegen_set_debug_model(lto_code_gen_t cg, lto_debug_model debug) {
+ unwrap(cg)->setDebugInfo(debug);
+ return false;
}
+bool lto_codegen_set_pic_model(lto_code_gen_t cg, lto_codegen_model model) {
+ 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;
+}
-//
-// 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)
-{
- return cg->setDebugInfo(debug, sLastErrorString);
+void lto_codegen_set_cpu(lto_code_gen_t cg, const char *cpu) {
+ return unwrap(cg)->setCpu(cpu);
}
+void lto_codegen_set_assembler_path(lto_code_gen_t cg, const char *path) {
+ // In here only for backwards compatibility. We use MC now.
+}
-//
-// 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)
-{
- return cg->setCodePICModel(model, sLastErrorString);
+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.
}
-//
-// sets the path to gcc
-//
-void lto_codegen_set_gcc_path(lto_code_gen_t cg, const char* path)
-{
- cg->setGccPath(path);
+void lto_codegen_add_must_preserve_symbol(lto_code_gen_t cg,
+ const char *symbol) {
+ unwrap(cg)->addMustPreserveSymbol(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);
+static void maybeParseOptions(lto_code_gen_t cg) {
+ if (!parsedOptions) {
+ unwrap(cg)->parseCodeGenDebugOptions();
+ lto_add_attrs(cg);
+ parsedOptions = true;
+ }
}
+bool lto_codegen_write_merged_modules(lto_code_gen_t cg, const char *path) {
+ maybeParseOptions(cg);
+ return !unwrap(cg)->writeMergedModules(path);
+}
-//
-// 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)
-{
- return cg->writeMergedModules(path, sLastErrorString);
+const void *lto_codegen_compile(lto_code_gen_t cg, size_t *length) {
+ 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);
+}
-//
-// Generates code for all added modules into one native object file.
-// On sucess 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 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).
-//
-extern const void*
-lto_codegen_compile(lto_code_gen_t cg, size_t* length)
-{
- return cg->compile(length, sLastErrorString);
+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();
}
+bool lto_codegen_compile_to_file(lto_code_gen_t cg, const char **name) {
+ maybeParseOptions(cg);
+ return !unwrap(cg)->compile_to_file(
+ name, DisableVerify, DisableInline, DisableGVNLoadPRE,
+ DisableLTOVectorization);
+}
-//
-// Used to pass extra options to the code generator
-//
-extern void
-lto_codegen_debug_options(lto_code_gen_t cg, const char * opt)
-{
- cg->setCodeGenDebugOptions(opt);
+void lto_codegen_debug_options(lto_code_gen_t cg, const char *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);
+}
projects / oota-llvm.git / blobdiff