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-c/Core.h"
17 #include "llvm-c/Target.h"
18 #include "llvm/CodeGen/CommandFlags.h"
19 #include "llvm/LTO/LTOCodeGenerator.h"
20 #include "llvm/LTO/LTOModule.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 LLVMInitializeAllTargetInfos();
50 LLVMInitializeAllTargets();
51 LLVMInitializeAllTargetMCs();
52 LLVMInitializeAllAsmParsers();
53 LLVMInitializeAllAsmPrinters();
54 LLVMInitializeAllDisassemblers();
59 // Convert the subtarget features into a string to pass to LTOCodeGenerator.
60 static void lto_add_attrs(lto_code_gen_t cg) {
63 for (unsigned i = 0; i < MAttrs.size(); ++i) {
66 attrs.append(MAttrs[i]);
69 cg->setAttr(attrs.c_str());
73 extern const char* lto_get_version() {
74 return LTOCodeGenerator::getVersionString();
77 const char* lto_get_error_message() {
78 return sLastErrorString.c_str();
81 bool lto_module_is_object_file(const char* path) {
82 return LTOModule::isBitcodeFile(path);
85 bool lto_module_is_object_file_for_target(const char* path,
86 const char* target_triplet_prefix) {
87 return LTOModule::isBitcodeFileForTarget(path, target_triplet_prefix);
90 bool lto_module_is_object_file_in_memory(const void* mem, size_t length) {
91 return LTOModule::isBitcodeFile(mem, length);
95 lto_module_is_object_file_in_memory_for_target(const void* mem,
97 const char* target_triplet_prefix) {
98 return LTOModule::isBitcodeFileForTarget(mem, length, target_triplet_prefix);
101 lto_module_t lto_module_create(const char* path) {
103 llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
104 return LTOModule::makeLTOModule(path, Options, sLastErrorString);
107 lto_module_t lto_module_create_from_fd(int fd, const char *path, size_t size) {
109 llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
110 return LTOModule::makeLTOModule(fd, path, size, Options, sLastErrorString);
113 lto_module_t lto_module_create_from_fd_at_offset(int fd, const char *path,
118 llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
119 return LTOModule::makeLTOModule(fd, path, map_size, offset, Options,
123 lto_module_t lto_module_create_from_memory(const void* mem, size_t length) {
125 llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
126 return LTOModule::makeLTOModule(mem, length, Options, sLastErrorString);
129 lto_module_t lto_module_create_from_memory_with_path(const void* mem,
133 llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
134 return LTOModule::makeLTOModule(mem, length, Options, sLastErrorString, path);
137 void lto_module_dispose(lto_module_t mod) {
141 const char* lto_module_get_target_triple(lto_module_t mod) {
142 return mod->getTargetTriple();
145 void lto_module_set_target_triple(lto_module_t mod, const char *triple) {
146 return mod->setTargetTriple(triple);
149 unsigned int lto_module_get_num_symbols(lto_module_t mod) {
150 return mod->getSymbolCount();
153 const char* lto_module_get_symbol_name(lto_module_t mod, unsigned int index) {
154 return mod->getSymbolName(index);
157 lto_symbol_attributes lto_module_get_symbol_attribute(lto_module_t mod,
158 unsigned int index) {
159 return mod->getSymbolAttributes(index);
162 unsigned int lto_module_get_num_deplibs(lto_module_t mod) {
163 return mod->getDependentLibraryCount();
166 const char* lto_module_get_deplib(lto_module_t mod, unsigned int index) {
167 return mod->getDependentLibrary(index);
170 unsigned int lto_module_get_num_linkeropts(lto_module_t mod) {
171 return mod->getLinkerOptCount();
174 const char* lto_module_get_linkeropt(lto_module_t mod, unsigned int index) {
175 return mod->getLinkerOpt(index);
178 void lto_codegen_set_diagnostic_handler(lto_code_gen_t cg,
179 lto_diagnostic_handler_t diag_handler,
181 cg->setDiagnosticHandler(diag_handler, ctxt);
184 lto_code_gen_t lto_codegen_create(void) {
187 TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
189 LTOCodeGenerator *CodeGen = new LTOCodeGenerator();
191 CodeGen->setTargetOptions(Options);
195 void lto_codegen_dispose(lto_code_gen_t cg) {
199 bool lto_codegen_add_module(lto_code_gen_t cg, lto_module_t mod) {
200 return !cg->addModule(mod, sLastErrorString);
203 bool lto_codegen_set_debug_model(lto_code_gen_t cg, lto_debug_model debug) {
204 cg->setDebugInfo(debug);
208 bool lto_codegen_set_pic_model(lto_code_gen_t cg, lto_codegen_model model) {
209 cg->setCodePICModel(model);
213 void lto_codegen_set_cpu(lto_code_gen_t cg, const char *cpu) {
214 return cg->setCpu(cpu);
217 void lto_codegen_set_attr(lto_code_gen_t cg, const char *attr) {
218 return cg->setAttr(attr);
221 void lto_codegen_set_assembler_path(lto_code_gen_t cg, const char *path) {
222 // In here only for backwards compatibility. We use MC now.
225 void lto_codegen_set_assembler_args(lto_code_gen_t cg, const char **args,
227 // In here only for backwards compatibility. We use MC now.
230 void lto_codegen_add_must_preserve_symbol(lto_code_gen_t cg,
231 const char *symbol) {
232 cg->addMustPreserveSymbol(symbol);
235 bool lto_codegen_write_merged_modules(lto_code_gen_t cg, const char *path) {
236 if (!parsedOptions) {
237 cg->parseCodeGenDebugOptions();
239 parsedOptions = true;
241 return !cg->writeMergedModules(path, sLastErrorString);
244 const void *lto_codegen_compile(lto_code_gen_t cg, size_t *length) {
245 if (!parsedOptions) {
246 cg->parseCodeGenDebugOptions();
248 parsedOptions = true;
250 return cg->compile(length, DisableOpt, DisableInline, DisableGVNLoadPRE,
254 bool lto_codegen_compile_to_file(lto_code_gen_t cg, const char **name) {
255 if (!parsedOptions) {
256 cg->parseCodeGenDebugOptions();
258 parsedOptions = true;
260 return !cg->compile_to_file(name, DisableOpt, DisableInline, DisableGVNLoadPRE,
264 void lto_codegen_debug_options(lto_code_gen_t cg, const char *opt) {
265 cg->setCodeGenDebugOptions(opt);