1 //===-lto.cpp - LLVM Link Time Optimizer ----------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file implements the Link Time Optimization library. This library is
10 // intended to be used by linker to optimize code at link time.
11 //
12 //===----------------------------------------------------------------------===//
13
14 #include "llvm-c/lto.h"
15 #include "llvm/ADT/STLExtras.h"
16 #include "llvm/ADT/StringExtras.h"
17 #include "llvm/Bitcode/BitcodeReader.h"
18 #include "llvm/CodeGen/CommandFlags.inc"
19 #include "llvm/IR/DiagnosticInfo.h"
20 #include "llvm/IR/DiagnosticPrinter.h"
21 #include "llvm/IR/LLVMContext.h"
22 #include "llvm/LTO/LTO.h"
23 #include "llvm/LTO/legacy/LTOCodeGenerator.h"
24 #include "llvm/LTO/legacy/LTOModule.h"
25 #include "llvm/LTO/legacy/ThinLTOCodeGenerator.h"
26 #include "llvm/Support/MemoryBuffer.h"
27 #include "llvm/Support/Signals.h"
28 #include "llvm/Support/TargetSelect.h"
29 #include "llvm/Support/raw_ostream.h"
30
31 // extra command-line flags needed for LTOCodeGenerator
32 static cl::opt<char>
33 OptLevel("O",
34 cl::desc("Optimization level. [-O0, -O1, -O2, or -O3] "
35 "(default = '-O2')"),
36 cl::Prefix,
37 cl::ZeroOrMore,
38 cl::init('2'));
39
40 static cl::opt<bool>
41 DisableInline("disable-inlining", cl::init(false),
42 cl::desc("Do not run the inliner pass"));
43
44 static cl::opt<bool>
45 DisableGVNLoadPRE("disable-gvn-loadpre", cl::init(false),
46 cl::desc("Do not run the GVN load PRE pass"));
47
48 static cl::opt<bool> DisableLTOVectorization(
49 "disable-lto-vectorization", cl::init(false),
50 cl::desc("Do not run loop or slp vectorization during LTO"));
51
52 static cl::opt<bool> EnableFreestanding(
53 "lto-freestanding", cl::init(false),
54 cl::desc("Enable Freestanding (disable builtins / TLI) during LTO"));
55
56 #ifdef NDEBUG
57 static bool VerifyByDefault = false;
58 #else
59 static bool VerifyByDefault = true;
60 #endif
61
62 static cl::opt<bool> DisableVerify(
63 "disable-llvm-verifier", cl::init(!VerifyByDefault),
64 cl::desc("Don't run the LLVM verifier during the optimization pipeline"));
65
66 // Holds most recent error string.
67 // *** Not thread safe ***
68 static std::string sLastErrorString;
69
70 // Holds the initialization state of the LTO module.
71 // *** Not thread safe ***
72 static bool initialized = false;
73
74 // Holds the command-line option parsing state of the LTO module.
75 static bool parsedOptions = false;
76
77 static LLVMContext *LTOContext = nullptr;
78
79 struct LTOToolDiagnosticHandler : public DiagnosticHandler {
handleDiagnosticsLTOToolDiagnosticHandler80 bool handleDiagnostics(const DiagnosticInfo &DI) override {
81 if (DI.getSeverity() != DS_Error) {
82 DiagnosticPrinterRawOStream DP(errs());
83 DI.print(DP);
84 errs() << '\n';
85 return true;
86 }
87 sLastErrorString = "";
88 {
89 raw_string_ostream Stream(sLastErrorString);
90 DiagnosticPrinterRawOStream DP(Stream);
91 DI.print(DP);
92 }
93 return true;
94 }
95 };
96
97 // Initialize the configured targets if they have not been initialized.
lto_initialize()98 static void lto_initialize() {
99 if (!initialized) {
100 #ifdef _WIN32
101 // Dialog box on crash disabling doesn't work across DLL boundaries, so do
102 // it here.
103 llvm::sys::DisableSystemDialogsOnCrash();
104 #endif
105
106 InitializeAllTargetInfos();
107 InitializeAllTargets();
108 InitializeAllTargetMCs();
109 InitializeAllAsmParsers();
110 InitializeAllAsmPrinters();
111 InitializeAllDisassemblers();
112
113 static LLVMContext Context;
114 LTOContext = &Context;
115 LTOContext->setDiagnosticHandler(
116 std::make_unique<LTOToolDiagnosticHandler>(), true);
117 initialized = true;
118 }
119 }
120
121 namespace {
122
handleLibLTODiagnostic(lto_codegen_diagnostic_severity_t Severity,const char * Msg,void *)123 static void handleLibLTODiagnostic(lto_codegen_diagnostic_severity_t Severity,
124 const char *Msg, void *) {
125 sLastErrorString = Msg;
126 }
127
128 // This derived class owns the native object file. This helps implement the
129 // libLTO API semantics, which require that the code generator owns the object
130 // file.
131 struct LibLTOCodeGenerator : LTOCodeGenerator {
LibLTOCodeGenerator__anon0f24a01d0111::LibLTOCodeGenerator132 LibLTOCodeGenerator() : LTOCodeGenerator(*LTOContext) { init(); }
LibLTOCodeGenerator__anon0f24a01d0111::LibLTOCodeGenerator133 LibLTOCodeGenerator(std::unique_ptr<LLVMContext> Context)
134 : LTOCodeGenerator(*Context), OwnedContext(std::move(Context)) {
135 init();
136 }
137
138 // Reset the module first in case MergedModule is created in OwnedContext.
139 // Module must be destructed before its context gets destructed.
~LibLTOCodeGenerator__anon0f24a01d0111::LibLTOCodeGenerator140 ~LibLTOCodeGenerator() { resetMergedModule(); }
141
init__anon0f24a01d0111::LibLTOCodeGenerator142 void init() { setDiagnosticHandler(handleLibLTODiagnostic, nullptr); }
143
144 std::unique_ptr<MemoryBuffer> NativeObjectFile;
145 std::unique_ptr<LLVMContext> OwnedContext;
146 };
147
148 }
149
DEFINE_SIMPLE_CONVERSION_FUNCTIONS(LibLTOCodeGenerator,lto_code_gen_t)150 DEFINE_SIMPLE_CONVERSION_FUNCTIONS(LibLTOCodeGenerator, lto_code_gen_t)
151 DEFINE_SIMPLE_CONVERSION_FUNCTIONS(ThinLTOCodeGenerator, thinlto_code_gen_t)
152 DEFINE_SIMPLE_CONVERSION_FUNCTIONS(LTOModule, lto_module_t)
153
154 // Convert the subtarget features into a string to pass to LTOCodeGenerator.
155 static void lto_add_attrs(lto_code_gen_t cg) {
156 LTOCodeGenerator *CG = unwrap(cg);
157 if (MAttrs.size()) {
158 std::string attrs;
159 for (unsigned i = 0; i < MAttrs.size(); ++i) {
160 if (i > 0)
161 attrs.append(",");
162 attrs.append(MAttrs[i]);
163 }
164
165 CG->setAttr(attrs);
166 }
167
168 if (OptLevel < '0' || OptLevel > '3')
169 report_fatal_error("Optimization level must be between 0 and 3");
170 CG->setOptLevel(OptLevel - '0');
171 CG->setFreestanding(EnableFreestanding);
172 }
173
lto_get_version()174 extern const char* lto_get_version() {
175 return LTOCodeGenerator::getVersionString();
176 }
177
lto_get_error_message()178 const char* lto_get_error_message() {
179 return sLastErrorString.c_str();
180 }
181
lto_module_is_object_file(const char * path)182 bool lto_module_is_object_file(const char* path) {
183 return LTOModule::isBitcodeFile(StringRef(path));
184 }
185
lto_module_is_object_file_for_target(const char * path,const char * target_triplet_prefix)186 bool lto_module_is_object_file_for_target(const char* path,
187 const char* target_triplet_prefix) {
188 ErrorOr<std::unique_ptr<MemoryBuffer>> Buffer = MemoryBuffer::getFile(path);
189 if (!Buffer)
190 return false;
191 return LTOModule::isBitcodeForTarget(Buffer->get(),
192 StringRef(target_triplet_prefix));
193 }
194
lto_module_has_objc_category(const void * mem,size_t length)195 bool lto_module_has_objc_category(const void *mem, size_t length) {
196 std::unique_ptr<MemoryBuffer> Buffer(LTOModule::makeBuffer(mem, length));
197 if (!Buffer)
198 return false;
199 LLVMContext Ctx;
200 ErrorOr<bool> Result = expectedToErrorOrAndEmitErrors(
201 Ctx, llvm::isBitcodeContainingObjCCategory(*Buffer));
202 return Result && *Result;
203 }
204
lto_module_is_object_file_in_memory(const void * mem,size_t length)205 bool lto_module_is_object_file_in_memory(const void* mem, size_t length) {
206 return LTOModule::isBitcodeFile(mem, length);
207 }
208
209 bool
lto_module_is_object_file_in_memory_for_target(const void * mem,size_t length,const char * target_triplet_prefix)210 lto_module_is_object_file_in_memory_for_target(const void* mem,
211 size_t length,
212 const char* target_triplet_prefix) {
213 std::unique_ptr<MemoryBuffer> buffer(LTOModule::makeBuffer(mem, length));
214 if (!buffer)
215 return false;
216 return LTOModule::isBitcodeForTarget(buffer.get(),
217 StringRef(target_triplet_prefix));
218 }
219
lto_module_create(const char * path)220 lto_module_t lto_module_create(const char* path) {
221 lto_initialize();
222 llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
223 ErrorOr<std::unique_ptr<LTOModule>> M =
224 LTOModule::createFromFile(*LTOContext, StringRef(path), Options);
225 if (!M)
226 return nullptr;
227 return wrap(M->release());
228 }
229
lto_module_create_from_fd(int fd,const char * path,size_t size)230 lto_module_t lto_module_create_from_fd(int fd, const char *path, size_t size) {
231 lto_initialize();
232 llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
233 ErrorOr<std::unique_ptr<LTOModule>> M = LTOModule::createFromOpenFile(
234 *LTOContext, fd, StringRef(path), size, Options);
235 if (!M)
236 return nullptr;
237 return wrap(M->release());
238 }
239
lto_module_create_from_fd_at_offset(int fd,const char * path,size_t file_size,size_t map_size,off_t offset)240 lto_module_t lto_module_create_from_fd_at_offset(int fd, const char *path,
241 size_t file_size,
242 size_t map_size,
243 off_t offset) {
244 lto_initialize();
245 llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
246 ErrorOr<std::unique_ptr<LTOModule>> M = LTOModule::createFromOpenFileSlice(
247 *LTOContext, fd, StringRef(path), map_size, offset, Options);
248 if (!M)
249 return nullptr;
250 return wrap(M->release());
251 }
252
lto_module_create_from_memory(const void * mem,size_t length)253 lto_module_t lto_module_create_from_memory(const void* mem, size_t length) {
254 lto_initialize();
255 llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
256 ErrorOr<std::unique_ptr<LTOModule>> M =
257 LTOModule::createFromBuffer(*LTOContext, mem, length, Options);
258 if (!M)
259 return nullptr;
260 return wrap(M->release());
261 }
262
lto_module_create_from_memory_with_path(const void * mem,size_t length,const char * path)263 lto_module_t lto_module_create_from_memory_with_path(const void* mem,
264 size_t length,
265 const char *path) {
266 lto_initialize();
267 llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
268 ErrorOr<std::unique_ptr<LTOModule>> M = LTOModule::createFromBuffer(
269 *LTOContext, mem, length, Options, StringRef(path));
270 if (!M)
271 return nullptr;
272 return wrap(M->release());
273 }
274
lto_module_create_in_local_context(const void * mem,size_t length,const char * path)275 lto_module_t lto_module_create_in_local_context(const void *mem, size_t length,
276 const char *path) {
277 lto_initialize();
278 llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
279
280 // Create a local context. Ownership will be transferred to LTOModule.
281 std::unique_ptr<LLVMContext> Context = std::make_unique<LLVMContext>();
282 Context->setDiagnosticHandler(std::make_unique<LTOToolDiagnosticHandler>(),
283 true);
284
285 ErrorOr<std::unique_ptr<LTOModule>> M = LTOModule::createInLocalContext(
286 std::move(Context), mem, length, Options, StringRef(path));
287 if (!M)
288 return nullptr;
289 return wrap(M->release());
290 }
291
lto_module_create_in_codegen_context(const void * mem,size_t length,const char * path,lto_code_gen_t cg)292 lto_module_t lto_module_create_in_codegen_context(const void *mem,
293 size_t length,
294 const char *path,
295 lto_code_gen_t cg) {
296 lto_initialize();
297 llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
298 ErrorOr<std::unique_ptr<LTOModule>> M = LTOModule::createFromBuffer(
299 unwrap(cg)->getContext(), mem, length, Options, StringRef(path));
300 return wrap(M->release());
301 }
302
lto_module_dispose(lto_module_t mod)303 void lto_module_dispose(lto_module_t mod) { delete unwrap(mod); }
304
lto_module_get_target_triple(lto_module_t mod)305 const char* lto_module_get_target_triple(lto_module_t mod) {
306 return unwrap(mod)->getTargetTriple().c_str();
307 }
308
lto_module_set_target_triple(lto_module_t mod,const char * triple)309 void lto_module_set_target_triple(lto_module_t mod, const char *triple) {
310 return unwrap(mod)->setTargetTriple(StringRef(triple));
311 }
312
lto_module_get_num_symbols(lto_module_t mod)313 unsigned int lto_module_get_num_symbols(lto_module_t mod) {
314 return unwrap(mod)->getSymbolCount();
315 }
316
lto_module_get_symbol_name(lto_module_t mod,unsigned int index)317 const char* lto_module_get_symbol_name(lto_module_t mod, unsigned int index) {
318 return unwrap(mod)->getSymbolName(index).data();
319 }
320
lto_module_get_symbol_attribute(lto_module_t mod,unsigned int index)321 lto_symbol_attributes lto_module_get_symbol_attribute(lto_module_t mod,
322 unsigned int index) {
323 return unwrap(mod)->getSymbolAttributes(index);
324 }
325
lto_module_get_linkeropts(lto_module_t mod)326 const char* lto_module_get_linkeropts(lto_module_t mod) {
327 return unwrap(mod)->getLinkerOpts().data();
328 }
329
lto_codegen_set_diagnostic_handler(lto_code_gen_t cg,lto_diagnostic_handler_t diag_handler,void * ctxt)330 void lto_codegen_set_diagnostic_handler(lto_code_gen_t cg,
331 lto_diagnostic_handler_t diag_handler,
332 void *ctxt) {
333 unwrap(cg)->setDiagnosticHandler(diag_handler, ctxt);
334 }
335
createCodeGen(bool InLocalContext)336 static lto_code_gen_t createCodeGen(bool InLocalContext) {
337 lto_initialize();
338
339 TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
340
341 LibLTOCodeGenerator *CodeGen =
342 InLocalContext ? new LibLTOCodeGenerator(std::make_unique<LLVMContext>())
343 : new LibLTOCodeGenerator();
344 CodeGen->setTargetOptions(Options);
345 return wrap(CodeGen);
346 }
347
lto_codegen_create(void)348 lto_code_gen_t lto_codegen_create(void) {
349 return createCodeGen(/* InLocalContext */ false);
350 }
351
lto_codegen_create_in_local_context(void)352 lto_code_gen_t lto_codegen_create_in_local_context(void) {
353 return createCodeGen(/* InLocalContext */ true);
354 }
355
lto_codegen_dispose(lto_code_gen_t cg)356 void lto_codegen_dispose(lto_code_gen_t cg) { delete unwrap(cg); }
357
lto_codegen_add_module(lto_code_gen_t cg,lto_module_t mod)358 bool lto_codegen_add_module(lto_code_gen_t cg, lto_module_t mod) {
359 return !unwrap(cg)->addModule(unwrap(mod));
360 }
361
lto_codegen_set_module(lto_code_gen_t cg,lto_module_t mod)362 void lto_codegen_set_module(lto_code_gen_t cg, lto_module_t mod) {
363 unwrap(cg)->setModule(std::unique_ptr<LTOModule>(unwrap(mod)));
364 }
365
lto_codegen_set_debug_model(lto_code_gen_t cg,lto_debug_model debug)366 bool lto_codegen_set_debug_model(lto_code_gen_t cg, lto_debug_model debug) {
367 unwrap(cg)->setDebugInfo(debug);
368 return false;
369 }
370
lto_codegen_set_pic_model(lto_code_gen_t cg,lto_codegen_model model)371 bool lto_codegen_set_pic_model(lto_code_gen_t cg, lto_codegen_model model) {
372 switch (model) {
373 case LTO_CODEGEN_PIC_MODEL_STATIC:
374 unwrap(cg)->setCodePICModel(Reloc::Static);
375 return false;
376 case LTO_CODEGEN_PIC_MODEL_DYNAMIC:
377 unwrap(cg)->setCodePICModel(Reloc::PIC_);
378 return false;
379 case LTO_CODEGEN_PIC_MODEL_DYNAMIC_NO_PIC:
380 unwrap(cg)->setCodePICModel(Reloc::DynamicNoPIC);
381 return false;
382 case LTO_CODEGEN_PIC_MODEL_DEFAULT:
383 unwrap(cg)->setCodePICModel(None);
384 return false;
385 }
386 sLastErrorString = "Unknown PIC model";
387 return true;
388 }
389
lto_codegen_set_cpu(lto_code_gen_t cg,const char * cpu)390 void lto_codegen_set_cpu(lto_code_gen_t cg, const char *cpu) {
391 return unwrap(cg)->setCpu(cpu);
392 }
393
lto_codegen_set_assembler_path(lto_code_gen_t cg,const char * path)394 void lto_codegen_set_assembler_path(lto_code_gen_t cg, const char *path) {
395 // In here only for backwards compatibility. We use MC now.
396 }
397
lto_codegen_set_assembler_args(lto_code_gen_t cg,const char ** args,int nargs)398 void lto_codegen_set_assembler_args(lto_code_gen_t cg, const char **args,
399 int nargs) {
400 // In here only for backwards compatibility. We use MC now.
401 }
402
lto_codegen_add_must_preserve_symbol(lto_code_gen_t cg,const char * symbol)403 void lto_codegen_add_must_preserve_symbol(lto_code_gen_t cg,
404 const char *symbol) {
405 unwrap(cg)->addMustPreserveSymbol(symbol);
406 }
407
maybeParseOptions(lto_code_gen_t cg)408 static void maybeParseOptions(lto_code_gen_t cg) {
409 if (!parsedOptions) {
410 unwrap(cg)->parseCodeGenDebugOptions();
411 lto_add_attrs(cg);
412 parsedOptions = true;
413 }
414 }
415
lto_codegen_write_merged_modules(lto_code_gen_t cg,const char * path)416 bool lto_codegen_write_merged_modules(lto_code_gen_t cg, const char *path) {
417 maybeParseOptions(cg);
418 return !unwrap(cg)->writeMergedModules(path);
419 }
420
lto_codegen_compile(lto_code_gen_t cg,size_t * length)421 const void *lto_codegen_compile(lto_code_gen_t cg, size_t *length) {
422 maybeParseOptions(cg);
423 LibLTOCodeGenerator *CG = unwrap(cg);
424 CG->NativeObjectFile =
425 CG->compile(DisableVerify, DisableInline, DisableGVNLoadPRE,
426 DisableLTOVectorization);
427 if (!CG->NativeObjectFile)
428 return nullptr;
429 *length = CG->NativeObjectFile->getBufferSize();
430 return CG->NativeObjectFile->getBufferStart();
431 }
432
lto_codegen_optimize(lto_code_gen_t cg)433 bool lto_codegen_optimize(lto_code_gen_t cg) {
434 maybeParseOptions(cg);
435 return !unwrap(cg)->optimize(DisableVerify, DisableInline, DisableGVNLoadPRE,
436 DisableLTOVectorization);
437 }
438
lto_codegen_compile_optimized(lto_code_gen_t cg,size_t * length)439 const void *lto_codegen_compile_optimized(lto_code_gen_t cg, size_t *length) {
440 maybeParseOptions(cg);
441 LibLTOCodeGenerator *CG = unwrap(cg);
442 CG->NativeObjectFile = CG->compileOptimized();
443 if (!CG->NativeObjectFile)
444 return nullptr;
445 *length = CG->NativeObjectFile->getBufferSize();
446 return CG->NativeObjectFile->getBufferStart();
447 }
448
lto_codegen_compile_to_file(lto_code_gen_t cg,const char ** name)449 bool lto_codegen_compile_to_file(lto_code_gen_t cg, const char **name) {
450 maybeParseOptions(cg);
451 return !unwrap(cg)->compile_to_file(
452 name, DisableVerify, DisableInline, DisableGVNLoadPRE,
453 DisableLTOVectorization);
454 }
455
lto_codegen_debug_options(lto_code_gen_t cg,const char * opt)456 void lto_codegen_debug_options(lto_code_gen_t cg, const char *opt) {
457 std::vector<const char *> Options;
458 for (std::pair<StringRef, StringRef> o = getToken(opt); !o.first.empty();
459 o = getToken(o.second))
460 Options.push_back(o.first.data());
461
462 unwrap(cg)->setCodeGenDebugOptions(Options);
463 }
464
lto_codegen_debug_options_array(lto_code_gen_t cg,const char * const * options,int number)465 void lto_codegen_debug_options_array(lto_code_gen_t cg,
466 const char *const *options, int number) {
467 unwrap(cg)->setCodeGenDebugOptions(makeArrayRef(options, number));
468 }
469
lto_api_version()470 unsigned int lto_api_version() { return LTO_API_VERSION; }
471
lto_codegen_set_should_internalize(lto_code_gen_t cg,bool ShouldInternalize)472 void lto_codegen_set_should_internalize(lto_code_gen_t cg,
473 bool ShouldInternalize) {
474 unwrap(cg)->setShouldInternalize(ShouldInternalize);
475 }
476
lto_codegen_set_should_embed_uselists(lto_code_gen_t cg,lto_bool_t ShouldEmbedUselists)477 void lto_codegen_set_should_embed_uselists(lto_code_gen_t cg,
478 lto_bool_t ShouldEmbedUselists) {
479 unwrap(cg)->setShouldEmbedUselists(ShouldEmbedUselists);
480 }
481
482 // ThinLTO API below
483
thinlto_create_codegen(void)484 thinlto_code_gen_t thinlto_create_codegen(void) {
485 lto_initialize();
486 ThinLTOCodeGenerator *CodeGen = new ThinLTOCodeGenerator();
487 CodeGen->setTargetOptions(InitTargetOptionsFromCodeGenFlags());
488 CodeGen->setFreestanding(EnableFreestanding);
489
490 if (OptLevel.getNumOccurrences()) {
491 if (OptLevel < '0' || OptLevel > '3')
492 report_fatal_error("Optimization level must be between 0 and 3");
493 CodeGen->setOptLevel(OptLevel - '0');
494 switch (OptLevel) {
495 case '0':
496 CodeGen->setCodeGenOptLevel(CodeGenOpt::None);
497 break;
498 case '1':
499 CodeGen->setCodeGenOptLevel(CodeGenOpt::Less);
500 break;
501 case '2':
502 CodeGen->setCodeGenOptLevel(CodeGenOpt::Default);
503 break;
504 case '3':
505 CodeGen->setCodeGenOptLevel(CodeGenOpt::Aggressive);
506 break;
507 }
508 }
509 return wrap(CodeGen);
510 }
511
thinlto_codegen_dispose(thinlto_code_gen_t cg)512 void thinlto_codegen_dispose(thinlto_code_gen_t cg) { delete unwrap(cg); }
513
thinlto_codegen_add_module(thinlto_code_gen_t cg,const char * Identifier,const char * Data,int Length)514 void thinlto_codegen_add_module(thinlto_code_gen_t cg, const char *Identifier,
515 const char *Data, int Length) {
516 unwrap(cg)->addModule(Identifier, StringRef(Data, Length));
517 }
518
thinlto_codegen_process(thinlto_code_gen_t cg)519 void thinlto_codegen_process(thinlto_code_gen_t cg) { unwrap(cg)->run(); }
520
thinlto_module_get_num_objects(thinlto_code_gen_t cg)521 unsigned int thinlto_module_get_num_objects(thinlto_code_gen_t cg) {
522 return unwrap(cg)->getProducedBinaries().size();
523 }
thinlto_module_get_object(thinlto_code_gen_t cg,unsigned int index)524 LTOObjectBuffer thinlto_module_get_object(thinlto_code_gen_t cg,
525 unsigned int index) {
526 assert(index < unwrap(cg)->getProducedBinaries().size() && "Index overflow");
527 auto &MemBuffer = unwrap(cg)->getProducedBinaries()[index];
528 return LTOObjectBuffer{MemBuffer->getBufferStart(),
529 MemBuffer->getBufferSize()};
530 }
531
thinlto_module_get_num_object_files(thinlto_code_gen_t cg)532 unsigned int thinlto_module_get_num_object_files(thinlto_code_gen_t cg) {
533 return unwrap(cg)->getProducedBinaryFiles().size();
534 }
thinlto_module_get_object_file(thinlto_code_gen_t cg,unsigned int index)535 const char *thinlto_module_get_object_file(thinlto_code_gen_t cg,
536 unsigned int index) {
537 assert(index < unwrap(cg)->getProducedBinaryFiles().size() &&
538 "Index overflow");
539 return unwrap(cg)->getProducedBinaryFiles()[index].c_str();
540 }
541
thinlto_codegen_disable_codegen(thinlto_code_gen_t cg,lto_bool_t disable)542 void thinlto_codegen_disable_codegen(thinlto_code_gen_t cg,
543 lto_bool_t disable) {
544 unwrap(cg)->disableCodeGen(disable);
545 }
546
thinlto_codegen_set_codegen_only(thinlto_code_gen_t cg,lto_bool_t CodeGenOnly)547 void thinlto_codegen_set_codegen_only(thinlto_code_gen_t cg,
548 lto_bool_t CodeGenOnly) {
549 unwrap(cg)->setCodeGenOnly(CodeGenOnly);
550 }
551
thinlto_debug_options(const char * const * options,int number)552 void thinlto_debug_options(const char *const *options, int number) {
553 // if options were requested, set them
554 if (number && options) {
555 std::vector<const char *> CodegenArgv(1, "libLTO");
556 for (auto Arg : ArrayRef<const char *>(options, number))
557 CodegenArgv.push_back(Arg);
558 cl::ParseCommandLineOptions(CodegenArgv.size(), CodegenArgv.data());
559 }
560 }
561
lto_module_is_thinlto(lto_module_t mod)562 lto_bool_t lto_module_is_thinlto(lto_module_t mod) {
563 return unwrap(mod)->isThinLTO();
564 }
565
thinlto_codegen_add_must_preserve_symbol(thinlto_code_gen_t cg,const char * Name,int Length)566 void thinlto_codegen_add_must_preserve_symbol(thinlto_code_gen_t cg,
567 const char *Name, int Length) {
568 unwrap(cg)->preserveSymbol(StringRef(Name, Length));
569 }
570
thinlto_codegen_add_cross_referenced_symbol(thinlto_code_gen_t cg,const char * Name,int Length)571 void thinlto_codegen_add_cross_referenced_symbol(thinlto_code_gen_t cg,
572 const char *Name, int Length) {
573 unwrap(cg)->crossReferenceSymbol(StringRef(Name, Length));
574 }
575
thinlto_codegen_set_cpu(thinlto_code_gen_t cg,const char * cpu)576 void thinlto_codegen_set_cpu(thinlto_code_gen_t cg, const char *cpu) {
577 return unwrap(cg)->setCpu(cpu);
578 }
579
thinlto_codegen_set_cache_dir(thinlto_code_gen_t cg,const char * cache_dir)580 void thinlto_codegen_set_cache_dir(thinlto_code_gen_t cg,
581 const char *cache_dir) {
582 return unwrap(cg)->setCacheDir(cache_dir);
583 }
584
thinlto_codegen_set_cache_pruning_interval(thinlto_code_gen_t cg,int interval)585 void thinlto_codegen_set_cache_pruning_interval(thinlto_code_gen_t cg,
586 int interval) {
587 return unwrap(cg)->setCachePruningInterval(interval);
588 }
589
thinlto_codegen_set_cache_entry_expiration(thinlto_code_gen_t cg,unsigned expiration)590 void thinlto_codegen_set_cache_entry_expiration(thinlto_code_gen_t cg,
591 unsigned expiration) {
592 return unwrap(cg)->setCacheEntryExpiration(expiration);
593 }
594
thinlto_codegen_set_final_cache_size_relative_to_available_space(thinlto_code_gen_t cg,unsigned Percentage)595 void thinlto_codegen_set_final_cache_size_relative_to_available_space(
596 thinlto_code_gen_t cg, unsigned Percentage) {
597 return unwrap(cg)->setMaxCacheSizeRelativeToAvailableSpace(Percentage);
598 }
599
thinlto_codegen_set_cache_size_bytes(thinlto_code_gen_t cg,unsigned MaxSizeBytes)600 void thinlto_codegen_set_cache_size_bytes(
601 thinlto_code_gen_t cg, unsigned MaxSizeBytes) {
602 return unwrap(cg)->setCacheMaxSizeBytes(MaxSizeBytes);
603 }
604
thinlto_codegen_set_cache_size_megabytes(thinlto_code_gen_t cg,unsigned MaxSizeMegabytes)605 void thinlto_codegen_set_cache_size_megabytes(
606 thinlto_code_gen_t cg, unsigned MaxSizeMegabytes) {
607 uint64_t MaxSizeBytes = MaxSizeMegabytes;
608 MaxSizeBytes *= 1024 * 1024;
609 return unwrap(cg)->setCacheMaxSizeBytes(MaxSizeBytes);
610 }
611
thinlto_codegen_set_cache_size_files(thinlto_code_gen_t cg,unsigned MaxSizeFiles)612 void thinlto_codegen_set_cache_size_files(
613 thinlto_code_gen_t cg, unsigned MaxSizeFiles) {
614 return unwrap(cg)->setCacheMaxSizeFiles(MaxSizeFiles);
615 }
616
thinlto_codegen_set_savetemps_dir(thinlto_code_gen_t cg,const char * save_temps_dir)617 void thinlto_codegen_set_savetemps_dir(thinlto_code_gen_t cg,
618 const char *save_temps_dir) {
619 return unwrap(cg)->setSaveTempsDir(save_temps_dir);
620 }
621
thinlto_set_generated_objects_dir(thinlto_code_gen_t cg,const char * save_temps_dir)622 void thinlto_set_generated_objects_dir(thinlto_code_gen_t cg,
623 const char *save_temps_dir) {
624 unwrap(cg)->setGeneratedObjectsDirectory(save_temps_dir);
625 }
626
thinlto_codegen_set_pic_model(thinlto_code_gen_t cg,lto_codegen_model model)627 lto_bool_t thinlto_codegen_set_pic_model(thinlto_code_gen_t cg,
628 lto_codegen_model model) {
629 switch (model) {
630 case LTO_CODEGEN_PIC_MODEL_STATIC:
631 unwrap(cg)->setCodePICModel(Reloc::Static);
632 return false;
633 case LTO_CODEGEN_PIC_MODEL_DYNAMIC:
634 unwrap(cg)->setCodePICModel(Reloc::PIC_);
635 return false;
636 case LTO_CODEGEN_PIC_MODEL_DYNAMIC_NO_PIC:
637 unwrap(cg)->setCodePICModel(Reloc::DynamicNoPIC);
638 return false;
639 case LTO_CODEGEN_PIC_MODEL_DEFAULT:
640 unwrap(cg)->setCodePICModel(None);
641 return false;
642 }
643 sLastErrorString = "Unknown PIC model";
644 return true;
645 }
646
DEFINE_SIMPLE_CONVERSION_FUNCTIONS(lto::InputFile,lto_input_t)647 DEFINE_SIMPLE_CONVERSION_FUNCTIONS(lto::InputFile, lto_input_t)
648
649 lto_input_t lto_input_create(const void *buffer, size_t buffer_size, const char *path) {
650 return wrap(LTOModule::createInputFile(buffer, buffer_size, path, sLastErrorString));
651 }
652
lto_input_dispose(lto_input_t input)653 void lto_input_dispose(lto_input_t input) {
654 delete unwrap(input);
655 }
656
lto_input_get_num_dependent_libraries(lto_input_t input)657 extern unsigned lto_input_get_num_dependent_libraries(lto_input_t input) {
658 return LTOModule::getDependentLibraryCount(unwrap(input));
659 }
660
lto_input_get_dependent_library(lto_input_t input,size_t index,size_t * size)661 extern const char *lto_input_get_dependent_library(lto_input_t input,
662 size_t index,
663 size_t *size) {
664 return LTOModule::getDependentLibrary(unwrap(input), index, size);
665 }
666
lto_runtime_lib_symbols_list(size_t * size)667 extern const char *const *lto_runtime_lib_symbols_list(size_t *size) {
668 auto symbols = lto::LTO::getRuntimeLibcallSymbols();
669 *size = symbols.size();
670 return symbols.data();
671 }
672