1 //===-lto.cpp - LLVM Link Time Optimizer ----------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the Link Time Optimization library. This library is
11 // intended to be used by linker to optimize code at link time.
13 //===----------------------------------------------------------------------===//
15 #include "llvm-c/lto.h"
16 #include "llvm/CodeGen/CommandFlags.h"
17 #include "llvm/LTO/LTOCodeGenerator.h"
18 #include "llvm/LTO/LTOModule.h"
19 #include "llvm/Support/MemoryBuffer.h"
20 #include "llvm/Support/TargetSelect.h"
22 // extra command-line flags needed for LTOCodeGenerator
24 DisableOpt("disable-opt", cl::init(false),
25 cl::desc("Do not run any optimization passes"));
28 DisableInline("disable-inlining", cl::init(false),
29 cl::desc("Do not run the inliner pass"));
32 DisableGVNLoadPRE("disable-gvn-loadpre", cl::init(false),
33 cl::desc("Do not run the GVN load PRE pass"));
35 // Holds most recent error string.
36 // *** Not thread safe ***
37 static std::string sLastErrorString;
39 // Holds the initialization state of the LTO module.
40 // *** Not thread safe ***
41 static bool initialized = false;
43 // Holds the command-line option parsing state of the LTO module.
44 static bool parsedOptions = false;
46 // Initialize the configured targets if they have not been initialized.
47 static void lto_initialize() {
49 InitializeAllTargetInfos();
50 InitializeAllTargets();
51 InitializeAllTargetMCs();
52 InitializeAllAsmParsers();
53 InitializeAllAsmPrinters();
54 InitializeAllDisassemblers();
59 DEFINE_SIMPLE_CONVERSION_FUNCTIONS(LTOCodeGenerator, lto_code_gen_t)
60 DEFINE_SIMPLE_CONVERSION_FUNCTIONS(LTOModule, lto_module_t)
62 // Convert the subtarget features into a string to pass to LTOCodeGenerator.
63 static void lto_add_attrs(lto_code_gen_t cg) {
64 LTOCodeGenerator *CG = unwrap(cg);
67 for (unsigned i = 0; i < MAttrs.size(); ++i) {
70 attrs.append(MAttrs[i]);
73 CG->setAttr(attrs.c_str());
77 extern const char* lto_get_version() {
78 return LTOCodeGenerator::getVersionString();
81 const char* lto_get_error_message() {
82 return sLastErrorString.c_str();
85 bool lto_module_is_object_file(const char* path) {
86 return LTOModule::isBitcodeFile(path);
89 bool lto_module_is_object_file_for_target(const char* path,
90 const char* target_triplet_prefix) {
91 ErrorOr<std::unique_ptr<MemoryBuffer>> Buffer = MemoryBuffer::getFile(path);
94 return LTOModule::isBitcodeForTarget(Buffer->get(), target_triplet_prefix);
97 bool lto_module_is_object_file_in_memory(const void* mem, size_t length) {
98 return LTOModule::isBitcodeFile(mem, length);
102 lto_module_is_object_file_in_memory_for_target(const void* mem,
104 const char* target_triplet_prefix) {
105 std::unique_ptr<MemoryBuffer> buffer(LTOModule::makeBuffer(mem, length));
108 return LTOModule::isBitcodeForTarget(buffer.get(), target_triplet_prefix);
111 lto_module_t lto_module_create(const char* path) {
113 llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
114 return wrap(LTOModule::createFromFile(path, Options, sLastErrorString));
117 lto_module_t lto_module_create_from_fd(int fd, const char *path, size_t size) {
119 llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
121 LTOModule::createFromOpenFile(fd, path, size, Options, sLastErrorString));
124 lto_module_t lto_module_create_from_fd_at_offset(int fd, const char *path,
129 llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
130 return wrap(LTOModule::createFromOpenFileSlice(fd, path, map_size, offset,
131 Options, sLastErrorString));
134 lto_module_t lto_module_create_from_memory(const void* mem, size_t length) {
136 llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
137 return wrap(LTOModule::createFromBuffer(mem, length, Options, sLastErrorString));
140 lto_module_t lto_module_create_from_memory_with_path(const void* mem,
144 llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
146 LTOModule::createFromBuffer(mem, length, Options, sLastErrorString, path));
149 void lto_module_dispose(lto_module_t mod) { delete unwrap(mod); }
151 const char* lto_module_get_target_triple(lto_module_t mod) {
152 return unwrap(mod)->getTargetTriple().c_str();
155 void lto_module_set_target_triple(lto_module_t mod, const char *triple) {
156 return unwrap(mod)->setTargetTriple(triple);
159 unsigned int lto_module_get_num_symbols(lto_module_t mod) {
160 return unwrap(mod)->getSymbolCount();
163 const char* lto_module_get_symbol_name(lto_module_t mod, unsigned int index) {
164 return unwrap(mod)->getSymbolName(index);
167 lto_symbol_attributes lto_module_get_symbol_attribute(lto_module_t mod,
168 unsigned int index) {
169 return unwrap(mod)->getSymbolAttributes(index);
172 unsigned int lto_module_get_num_deplibs(lto_module_t mod) {
173 return unwrap(mod)->getDependentLibraryCount();
176 const char* lto_module_get_deplib(lto_module_t mod, unsigned int index) {
177 return unwrap(mod)->getDependentLibrary(index);
180 unsigned int lto_module_get_num_linkeropts(lto_module_t mod) {
181 return unwrap(mod)->getLinkerOptCount();
184 const char* lto_module_get_linkeropt(lto_module_t mod, unsigned int index) {
185 return unwrap(mod)->getLinkerOpt(index);
188 void lto_codegen_set_diagnostic_handler(lto_code_gen_t cg,
189 lto_diagnostic_handler_t diag_handler,
191 unwrap(cg)->setDiagnosticHandler(diag_handler, ctxt);
194 lto_code_gen_t lto_codegen_create(void) {
197 TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
199 LTOCodeGenerator *CodeGen = new LTOCodeGenerator();
201 CodeGen->setTargetOptions(Options);
202 return wrap(CodeGen);
205 void lto_codegen_dispose(lto_code_gen_t cg) { delete unwrap(cg); }
207 bool lto_codegen_add_module(lto_code_gen_t cg, lto_module_t mod) {
208 return !unwrap(cg)->addModule(unwrap(mod), sLastErrorString);
211 bool lto_codegen_set_debug_model(lto_code_gen_t cg, lto_debug_model debug) {
212 unwrap(cg)->setDebugInfo(debug);
216 bool lto_codegen_set_pic_model(lto_code_gen_t cg, lto_codegen_model model) {
217 unwrap(cg)->setCodePICModel(model);
221 void lto_codegen_set_cpu(lto_code_gen_t cg, const char *cpu) {
222 return unwrap(cg)->setCpu(cpu);
225 void lto_codegen_set_assembler_path(lto_code_gen_t cg, const char *path) {
226 // In here only for backwards compatibility. We use MC now.
229 void lto_codegen_set_assembler_args(lto_code_gen_t cg, const char **args,
231 // In here only for backwards compatibility. We use MC now.
234 void lto_codegen_add_must_preserve_symbol(lto_code_gen_t cg,
235 const char *symbol) {
236 unwrap(cg)->addMustPreserveSymbol(symbol);
239 bool lto_codegen_write_merged_modules(lto_code_gen_t cg, const char *path) {
240 if (!parsedOptions) {
241 unwrap(cg)->parseCodeGenDebugOptions();
243 parsedOptions = true;
245 return !unwrap(cg)->writeMergedModules(path, sLastErrorString);
248 const void *lto_codegen_compile(lto_code_gen_t cg, size_t *length) {
249 if (!parsedOptions) {
250 unwrap(cg)->parseCodeGenDebugOptions();
252 parsedOptions = true;
254 return unwrap(cg)->compile(length, DisableOpt, DisableInline,
255 DisableGVNLoadPRE, sLastErrorString);
258 bool lto_codegen_compile_to_file(lto_code_gen_t cg, const char **name) {
259 if (!parsedOptions) {
260 unwrap(cg)->parseCodeGenDebugOptions();
262 parsedOptions = true;
264 return !unwrap(cg)->compile_to_file(name, DisableOpt, DisableInline,
265 DisableGVNLoadPRE, sLastErrorString);
268 void lto_codegen_debug_options(lto_code_gen_t cg, const char *opt) {
269 unwrap(cg)->setCodeGenDebugOptions(opt);