//===----------------------------------------------------------------------===//
#include "llvm-c/lto.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),
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) {
+#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;
}
}
-DEFINE_SIMPLE_CONVERSION_FUNCTIONS(LTOCodeGenerator, lto_code_gen_t)
+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.
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() {
lto_module_t lto_module_create(const char* path) {
lto_initialize();
llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
- return wrap(LTOModule::createFromFile(path, Options, sLastErrorString));
+ ErrorOr<std::unique_ptr<LTOModule>> M =
+ LTOModule::createFromFile(*LTOContext, path, Options);
+ if (!M)
+ return nullptr;
+ return wrap(M->release());
}
lto_module_t lto_module_create_from_fd(int fd, const char *path, size_t size) {
lto_initialize();
llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
- return wrap(
- LTOModule::createFromOpenFile(fd, path, size, Options, sLastErrorString));
+ 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,
off_t offset) {
lto_initialize();
llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
- return wrap(LTOModule::createFromOpenFileSlice(fd, path, map_size, offset,
- Options, sLastErrorString));
+ 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_t lto_module_create_from_memory(const void* mem, size_t length) {
lto_initialize();
llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
- return wrap(LTOModule::createFromBuffer(mem, length, Options, sLastErrorString));
+ 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,
const char *path) {
lto_initialize();
llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
- return wrap(
- LTOModule::createFromBuffer(mem, length, Options, sLastErrorString, path));
+ ErrorOr<std::unique_ptr<LTOModule>> M =
+ LTOModule::createFromBuffer(*LTOContext, mem, length, Options, path);
+ if (!M)
+ return nullptr;
+ return wrap(M->release());
}
lto_module_t lto_module_create_in_local_context(const void *mem, size_t length,
const char *path) {
lto_initialize();
llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
- return wrap(LTOModule::createInLocalContext(mem, length, Options,
- sLastErrorString, path));
+ 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,
lto_code_gen_t cg) {
lto_initialize();
llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
- return wrap(LTOModule::createInContext(mem, length, Options, sLastErrorString,
- path, &unwrap(cg)->getContext()));
+ 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); }
return unwrap(mod)->getSymbolAttributes(index);
}
-unsigned int lto_module_get_num_deplibs(lto_module_t mod) {
- return unwrap(mod)->getDependentLibraryCount();
-}
-
-const char* lto_module_get_deplib(lto_module_t mod, unsigned int index) {
- return unwrap(mod)->getDependentLibrary(index);
-}
-
-unsigned int lto_module_get_num_linkeropts(lto_module_t mod) {
- return unwrap(mod)->getLinkerOptCount();
-}
-
-const char* lto_module_get_linkeropt(lto_module_t mod, unsigned int index) {
- return unwrap(mod)->getLinkerOpt(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,
TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
- LTOCodeGenerator *CodeGen =
- InLocalContext ? new LTOCodeGenerator(make_unique<LLVMContext>())
- : new LTOCodeGenerator();
- if (CodeGen)
- CodeGen->setTargetOptions(Options);
+ LibLTOCodeGenerator *CodeGen =
+ InLocalContext ? new LibLTOCodeGenerator(make_unique<LLVMContext>())
+ : new LibLTOCodeGenerator();
+ CodeGen->setTargetOptions(Options);
return wrap(CodeGen);
}
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)));
+}
+
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) {
- unwrap(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;
}
void lto_codegen_set_cpu(lto_code_gen_t cg, const char *cpu) {
unwrap(cg)->addMustPreserveSymbol(symbol);
}
-bool lto_codegen_write_merged_modules(lto_code_gen_t cg, const char *path) {
+static void maybeParseOptions(lto_code_gen_t cg) {
if (!parsedOptions) {
unwrap(cg)->parseCodeGenDebugOptions();
lto_add_attrs(cg);
parsedOptions = true;
}
- return !unwrap(cg)->writeMergedModules(path, sLastErrorString);
+}
+
+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) {
- unwrap(cg)->parseCodeGenDebugOptions();
- lto_add_attrs(cg);
- parsedOptions = true;
- }
- return unwrap(cg)->compile(length, DisableOpt, DisableInline,
- DisableGVNLoadPRE, DisableLTOVectorization,
- 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();
}
bool lto_codegen_compile_to_file(lto_code_gen_t cg, const char **name) {
- if (!parsedOptions) {
- unwrap(cg)->parseCodeGenDebugOptions();
- lto_add_attrs(cg);
- parsedOptions = true;
- }
+ maybeParseOptions(cg);
return !unwrap(cg)->compile_to_file(
- name, DisableOpt, DisableInline, DisableGVNLoadPRE,
- DisableLTOVectorization, sLastErrorString);
+ name, DisableVerify, DisableInline, DisableGVNLoadPRE,
+ DisableLTOVectorization);
}
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);
+}
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