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 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 return LTOModule::isBitcodeFileForTarget(path, target_triplet_prefix);
94 bool lto_module_is_object_file_in_memory(const void* mem, size_t length) {
95 return LTOModule::isBitcodeFile(mem, length);
99 lto_module_is_object_file_in_memory_for_target(const void* mem,
101 const char* target_triplet_prefix) {
102 return LTOModule::isBitcodeFileForTarget(mem, length, target_triplet_prefix);
105 lto_module_t lto_module_create(const char* path) {
107 llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
108 return wrap(LTOModule::makeLTOModule(path, Options, sLastErrorString));
111 lto_module_t lto_module_create_from_fd(int fd, const char *path, size_t size) {
113 llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
115 LTOModule::makeLTOModule(fd, path, size, Options, sLastErrorString));
118 lto_module_t lto_module_create_from_fd_at_offset(int fd, const char *path,
123 llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
124 return wrap(LTOModule::makeLTOModule(fd, path, map_size, offset, Options,
128 lto_module_t lto_module_create_from_memory(const void* mem, size_t length) {
130 llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
131 return wrap(LTOModule::makeLTOModule(mem, length, Options, sLastErrorString));
134 lto_module_t lto_module_create_from_memory_with_path(const void* mem,
138 llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
140 LTOModule::makeLTOModule(mem, length, Options, sLastErrorString, path));
143 void lto_module_dispose(lto_module_t mod) { delete unwrap(mod); }
145 const char* lto_module_get_target_triple(lto_module_t mod) {
146 return unwrap(mod)->getTargetTriple();
149 void lto_module_set_target_triple(lto_module_t mod, const char *triple) {
150 return unwrap(mod)->setTargetTriple(triple);
153 unsigned int lto_module_get_num_symbols(lto_module_t mod) {
154 return unwrap(mod)->getSymbolCount();
157 const char* lto_module_get_symbol_name(lto_module_t mod, unsigned int index) {
158 return unwrap(mod)->getSymbolName(index);
161 lto_symbol_attributes lto_module_get_symbol_attribute(lto_module_t mod,
162 unsigned int index) {
163 return unwrap(mod)->getSymbolAttributes(index);
166 unsigned int lto_module_get_num_deplibs(lto_module_t mod) {
167 return unwrap(mod)->getDependentLibraryCount();
170 const char* lto_module_get_deplib(lto_module_t mod, unsigned int index) {
171 return unwrap(mod)->getDependentLibrary(index);
174 unsigned int lto_module_get_num_linkeropts(lto_module_t mod) {
175 return unwrap(mod)->getLinkerOptCount();
178 const char* lto_module_get_linkeropt(lto_module_t mod, unsigned int index) {
179 return unwrap(mod)->getLinkerOpt(index);
182 void lto_codegen_set_diagnostic_handler(lto_code_gen_t cg,
183 lto_diagnostic_handler_t diag_handler,
185 unwrap(cg)->setDiagnosticHandler(diag_handler, ctxt);
188 lto_code_gen_t lto_codegen_create(void) {
191 TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
193 LTOCodeGenerator *CodeGen = new LTOCodeGenerator();
195 CodeGen->setTargetOptions(Options);
196 return wrap(CodeGen);
199 void lto_codegen_dispose(lto_code_gen_t cg) { delete unwrap(cg); }
201 bool lto_codegen_add_module(lto_code_gen_t cg, lto_module_t mod) {
202 return !unwrap(cg)->addModule(unwrap(mod), sLastErrorString);
205 bool lto_codegen_set_debug_model(lto_code_gen_t cg, lto_debug_model debug) {
206 unwrap(cg)->setDebugInfo(debug);
210 bool lto_codegen_set_pic_model(lto_code_gen_t cg, lto_codegen_model model) {
211 unwrap(cg)->setCodePICModel(model);
215 void lto_codegen_set_cpu(lto_code_gen_t cg, const char *cpu) {
216 return unwrap(cg)->setCpu(cpu);
219 void lto_codegen_set_attr(lto_code_gen_t cg, const char *attr) {
220 return unwrap(cg)->setAttr(attr);
223 void lto_codegen_set_assembler_path(lto_code_gen_t cg, const char *path) {
224 // In here only for backwards compatibility. We use MC now.
227 void lto_codegen_set_assembler_args(lto_code_gen_t cg, const char **args,
229 // In here only for backwards compatibility. We use MC now.
232 void lto_codegen_add_must_preserve_symbol(lto_code_gen_t cg,
233 const char *symbol) {
234 unwrap(cg)->addMustPreserveSymbol(symbol);
237 bool lto_codegen_write_merged_modules(lto_code_gen_t cg, const char *path) {
238 if (!parsedOptions) {
239 unwrap(cg)->parseCodeGenDebugOptions();
241 parsedOptions = true;
243 return !unwrap(cg)->writeMergedModules(path, sLastErrorString);
246 const void *lto_codegen_compile(lto_code_gen_t cg, size_t *length) {
247 if (!parsedOptions) {
248 unwrap(cg)->parseCodeGenDebugOptions();
250 parsedOptions = true;
252 return unwrap(cg)->compile(length, DisableOpt, DisableInline,
253 DisableGVNLoadPRE, sLastErrorString);
256 bool lto_codegen_compile_to_file(lto_code_gen_t cg, const char **name) {
257 if (!parsedOptions) {
258 unwrap(cg)->parseCodeGenDebugOptions();
260 parsedOptions = true;
262 return !unwrap(cg)->compile_to_file(name, DisableOpt, DisableInline,
263 DisableGVNLoadPRE, sLastErrorString);
266 void lto_codegen_debug_options(lto_code_gen_t cg, const char *opt) {
267 unwrap(cg)->setCodeGenDebugOptions(opt);