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.h"
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 using namespace llvm;
32
33 static codegen::RegisterCodeGenFlags CGF;
34
35 // extra command-line flags needed for LTOCodeGenerator
36 static cl::opt<char>
37 OptLevel("O",
38 cl::desc("Optimization level. [-O0, -O1, -O2, or -O3] "
39 "(default = '-O2')"),
40 cl::Prefix,
41 cl::ZeroOrMore,
42 cl::init('2'));
43
44 static cl::opt<bool> EnableFreestanding(
45 "lto-freestanding", cl::init(false),
46 cl::desc("Enable Freestanding (disable builtins / TLI) during LTO"));
47
48 #ifdef NDEBUG
49 static bool VerifyByDefault = false;
50 #else
51 static bool VerifyByDefault = true;
52 #endif
53
54 static cl::opt<bool> DisableVerify(
55 "disable-llvm-verifier", cl::init(!VerifyByDefault),
56 cl::desc("Don't run the LLVM verifier during the optimization pipeline"));
57
58 // Holds most recent error string.
59 // *** Not thread safe ***
60 static std::string sLastErrorString;
61
62 // Holds the initialization state of the LTO module.
63 // *** Not thread safe ***
64 static bool initialized = false;
65
66 // Represent the state of parsing command line debug options.
67 static enum class OptParsingState {
68 NotParsed, // Initial state.
69 Early, // After lto_set_debug_options is called.
70 Done // After maybeParseOptions is called.
71 } optionParsingState = OptParsingState::NotParsed;
72
73 static LLVMContext *LTOContext = nullptr;
74
75 struct LTOToolDiagnosticHandler : public DiagnosticHandler {
handleDiagnosticsLTOToolDiagnosticHandler76 bool handleDiagnostics(const DiagnosticInfo &DI) override {
77 if (DI.getSeverity() != DS_Error) {
78 DiagnosticPrinterRawOStream DP(errs());
79 DI.print(DP);
80 errs() << '\n';
81 return true;
82 }
83 sLastErrorString = "";
84 {
85 raw_string_ostream Stream(sLastErrorString);
86 DiagnosticPrinterRawOStream DP(Stream);
87 DI.print(DP);
88 }
89 return true;
90 }
91 };
92
93 // Initialize the configured targets if they have not been initialized.
lto_initialize()94 static void lto_initialize() {
95 if (!initialized) {
96 #ifdef _WIN32
97 // Dialog box on crash disabling doesn't work across DLL boundaries, so do
98 // it here.
99 llvm::sys::DisableSystemDialogsOnCrash();
100 #endif
101
102 InitializeAllTargetInfos();
103 InitializeAllTargets();
104 InitializeAllTargetMCs();
105 InitializeAllAsmParsers();
106 InitializeAllAsmPrinters();
107 InitializeAllDisassemblers();
108
109 static LLVMContext Context;
110 LTOContext = &Context;
111 LTOContext->setDiagnosticHandler(
112 std::make_unique<LTOToolDiagnosticHandler>(), true);
113 initialized = true;
114 }
115 }
116
117 namespace {
118
handleLibLTODiagnostic(lto_codegen_diagnostic_severity_t Severity,const char * Msg,void *)119 static void handleLibLTODiagnostic(lto_codegen_diagnostic_severity_t Severity,
120 const char *Msg, void *) {
121 sLastErrorString = Msg;
122 }
123
124 // This derived class owns the native object file. This helps implement the
125 // libLTO API semantics, which require that the code generator owns the object
126 // file.
127 struct LibLTOCodeGenerator : LTOCodeGenerator {
LibLTOCodeGenerator__anon1f745e7d0111::LibLTOCodeGenerator128 LibLTOCodeGenerator() : LTOCodeGenerator(*LTOContext) { init(); }
LibLTOCodeGenerator__anon1f745e7d0111::LibLTOCodeGenerator129 LibLTOCodeGenerator(std::unique_ptr<LLVMContext> Context)
130 : LTOCodeGenerator(*Context), OwnedContext(std::move(Context)) {
131 init();
132 }
133
134 // Reset the module first in case MergedModule is created in OwnedContext.
135 // Module must be destructed before its context gets destructed.
~LibLTOCodeGenerator__anon1f745e7d0111::LibLTOCodeGenerator136 ~LibLTOCodeGenerator() { resetMergedModule(); }
137
init__anon1f745e7d0111::LibLTOCodeGenerator138 void init() { setDiagnosticHandler(handleLibLTODiagnostic, nullptr); }
139
140 std::unique_ptr<MemoryBuffer> NativeObjectFile;
141 std::unique_ptr<LLVMContext> OwnedContext;
142 };
143
144 }
145
DEFINE_SIMPLE_CONVERSION_FUNCTIONS(LibLTOCodeGenerator,lto_code_gen_t)146 DEFINE_SIMPLE_CONVERSION_FUNCTIONS(LibLTOCodeGenerator, lto_code_gen_t)
147 DEFINE_SIMPLE_CONVERSION_FUNCTIONS(ThinLTOCodeGenerator, thinlto_code_gen_t)
148 DEFINE_SIMPLE_CONVERSION_FUNCTIONS(LTOModule, lto_module_t)
149
150 // Convert the subtarget features into a string to pass to LTOCodeGenerator.
151 static void lto_add_attrs(lto_code_gen_t cg) {
152 LTOCodeGenerator *CG = unwrap(cg);
153 CG->setAttrs(codegen::getMAttrs());
154
155 if (OptLevel < '0' || OptLevel > '3')
156 report_fatal_error("Optimization level must be between 0 and 3");
157 CG->setOptLevel(OptLevel - '0');
158 CG->setFreestanding(EnableFreestanding);
159 CG->setDisableVerify(DisableVerify);
160 }
161
lto_get_version()162 extern const char* lto_get_version() {
163 return LTOCodeGenerator::getVersionString();
164 }
165
lto_get_error_message()166 const char* lto_get_error_message() {
167 return sLastErrorString.c_str();
168 }
169
lto_module_is_object_file(const char * path)170 bool lto_module_is_object_file(const char* path) {
171 return LTOModule::isBitcodeFile(StringRef(path));
172 }
173
lto_module_is_object_file_for_target(const char * path,const char * target_triplet_prefix)174 bool lto_module_is_object_file_for_target(const char* path,
175 const char* target_triplet_prefix) {
176 ErrorOr<std::unique_ptr<MemoryBuffer>> Buffer = MemoryBuffer::getFile(path);
177 if (!Buffer)
178 return false;
179 return LTOModule::isBitcodeForTarget(Buffer->get(),
180 StringRef(target_triplet_prefix));
181 }
182
lto_module_has_objc_category(const void * mem,size_t length)183 bool lto_module_has_objc_category(const void *mem, size_t length) {
184 std::unique_ptr<MemoryBuffer> Buffer(LTOModule::makeBuffer(mem, length));
185 if (!Buffer)
186 return false;
187 LLVMContext Ctx;
188 ErrorOr<bool> Result = expectedToErrorOrAndEmitErrors(
189 Ctx, llvm::isBitcodeContainingObjCCategory(*Buffer));
190 return Result && *Result;
191 }
192
lto_module_is_object_file_in_memory(const void * mem,size_t length)193 bool lto_module_is_object_file_in_memory(const void* mem, size_t length) {
194 return LTOModule::isBitcodeFile(mem, length);
195 }
196
197 bool
lto_module_is_object_file_in_memory_for_target(const void * mem,size_t length,const char * target_triplet_prefix)198 lto_module_is_object_file_in_memory_for_target(const void* mem,
199 size_t length,
200 const char* target_triplet_prefix) {
201 std::unique_ptr<MemoryBuffer> buffer(LTOModule::makeBuffer(mem, length));
202 if (!buffer)
203 return false;
204 return LTOModule::isBitcodeForTarget(buffer.get(),
205 StringRef(target_triplet_prefix));
206 }
207
lto_module_create(const char * path)208 lto_module_t lto_module_create(const char* path) {
209 lto_initialize();
210 llvm::TargetOptions Options =
211 codegen::InitTargetOptionsFromCodeGenFlags(Triple());
212 ErrorOr<std::unique_ptr<LTOModule>> M =
213 LTOModule::createFromFile(*LTOContext, StringRef(path), Options);
214 if (!M)
215 return nullptr;
216 return wrap(M->release());
217 }
218
lto_module_create_from_fd(int fd,const char * path,size_t size)219 lto_module_t lto_module_create_from_fd(int fd, const char *path, size_t size) {
220 lto_initialize();
221 llvm::TargetOptions Options =
222 codegen::InitTargetOptionsFromCodeGenFlags(Triple());
223 ErrorOr<std::unique_ptr<LTOModule>> M = LTOModule::createFromOpenFile(
224 *LTOContext, fd, StringRef(path), size, Options);
225 if (!M)
226 return nullptr;
227 return wrap(M->release());
228 }
229
lto_module_create_from_fd_at_offset(int fd,const char * path,size_t file_size,size_t map_size,off_t offset)230 lto_module_t lto_module_create_from_fd_at_offset(int fd, const char *path,
231 size_t file_size,
232 size_t map_size,
233 off_t offset) {
234 lto_initialize();
235 llvm::TargetOptions Options =
236 codegen::InitTargetOptionsFromCodeGenFlags(Triple());
237 ErrorOr<std::unique_ptr<LTOModule>> M = LTOModule::createFromOpenFileSlice(
238 *LTOContext, fd, StringRef(path), map_size, offset, Options);
239 if (!M)
240 return nullptr;
241 return wrap(M->release());
242 }
243
lto_module_create_from_memory(const void * mem,size_t length)244 lto_module_t lto_module_create_from_memory(const void* mem, size_t length) {
245 lto_initialize();
246 llvm::TargetOptions Options =
247 codegen::InitTargetOptionsFromCodeGenFlags(Triple());
248 ErrorOr<std::unique_ptr<LTOModule>> M =
249 LTOModule::createFromBuffer(*LTOContext, mem, length, Options);
250 if (!M)
251 return nullptr;
252 return wrap(M->release());
253 }
254
lto_module_create_from_memory_with_path(const void * mem,size_t length,const char * path)255 lto_module_t lto_module_create_from_memory_with_path(const void* mem,
256 size_t length,
257 const char *path) {
258 lto_initialize();
259 llvm::TargetOptions Options =
260 codegen::InitTargetOptionsFromCodeGenFlags(Triple());
261 ErrorOr<std::unique_ptr<LTOModule>> M = LTOModule::createFromBuffer(
262 *LTOContext, mem, length, Options, StringRef(path));
263 if (!M)
264 return nullptr;
265 return wrap(M->release());
266 }
267
lto_module_create_in_local_context(const void * mem,size_t length,const char * path)268 lto_module_t lto_module_create_in_local_context(const void *mem, size_t length,
269 const char *path) {
270 lto_initialize();
271 llvm::TargetOptions Options =
272 codegen::InitTargetOptionsFromCodeGenFlags(Triple());
273
274 // Create a local context. Ownership will be transferred to LTOModule.
275 std::unique_ptr<LLVMContext> Context = std::make_unique<LLVMContext>();
276 Context->setDiagnosticHandler(std::make_unique<LTOToolDiagnosticHandler>(),
277 true);
278
279 ErrorOr<std::unique_ptr<LTOModule>> M = LTOModule::createInLocalContext(
280 std::move(Context), mem, length, Options, StringRef(path));
281 if (!M)
282 return nullptr;
283 return wrap(M->release());
284 }
285
lto_module_create_in_codegen_context(const void * mem,size_t length,const char * path,lto_code_gen_t cg)286 lto_module_t lto_module_create_in_codegen_context(const void *mem,
287 size_t length,
288 const char *path,
289 lto_code_gen_t cg) {
290 lto_initialize();
291 llvm::TargetOptions Options =
292 codegen::InitTargetOptionsFromCodeGenFlags(Triple());
293 ErrorOr<std::unique_ptr<LTOModule>> M = LTOModule::createFromBuffer(
294 unwrap(cg)->getContext(), mem, length, Options, StringRef(path));
295 return wrap(M->release());
296 }
297
lto_module_dispose(lto_module_t mod)298 void lto_module_dispose(lto_module_t mod) { delete unwrap(mod); }
299
lto_module_get_target_triple(lto_module_t mod)300 const char* lto_module_get_target_triple(lto_module_t mod) {
301 return unwrap(mod)->getTargetTriple().c_str();
302 }
303
lto_module_set_target_triple(lto_module_t mod,const char * triple)304 void lto_module_set_target_triple(lto_module_t mod, const char *triple) {
305 return unwrap(mod)->setTargetTriple(StringRef(triple));
306 }
307
lto_module_get_num_symbols(lto_module_t mod)308 unsigned int lto_module_get_num_symbols(lto_module_t mod) {
309 return unwrap(mod)->getSymbolCount();
310 }
311
lto_module_get_symbol_name(lto_module_t mod,unsigned int index)312 const char* lto_module_get_symbol_name(lto_module_t mod, unsigned int index) {
313 return unwrap(mod)->getSymbolName(index).data();
314 }
315
lto_module_get_symbol_attribute(lto_module_t mod,unsigned int index)316 lto_symbol_attributes lto_module_get_symbol_attribute(lto_module_t mod,
317 unsigned int index) {
318 return unwrap(mod)->getSymbolAttributes(index);
319 }
320
lto_module_get_linkeropts(lto_module_t mod)321 const char* lto_module_get_linkeropts(lto_module_t mod) {
322 return unwrap(mod)->getLinkerOpts().data();
323 }
324
lto_module_get_macho_cputype(lto_module_t mod,unsigned int * out_cputype,unsigned int * out_cpusubtype)325 lto_bool_t lto_module_get_macho_cputype(lto_module_t mod,
326 unsigned int *out_cputype,
327 unsigned int *out_cpusubtype) {
328 LTOModule *M = unwrap(mod);
329 Expected<uint32_t> CPUType = M->getMachOCPUType();
330 if (!CPUType) {
331 sLastErrorString = toString(CPUType.takeError());
332 return true;
333 }
334 *out_cputype = *CPUType;
335
336 Expected<uint32_t> CPUSubType = M->getMachOCPUSubType();
337 if (!CPUSubType) {
338 sLastErrorString = toString(CPUSubType.takeError());
339 return true;
340 }
341 *out_cpusubtype = *CPUSubType;
342
343 return false;
344 }
345
lto_codegen_set_diagnostic_handler(lto_code_gen_t cg,lto_diagnostic_handler_t diag_handler,void * ctxt)346 void lto_codegen_set_diagnostic_handler(lto_code_gen_t cg,
347 lto_diagnostic_handler_t diag_handler,
348 void *ctxt) {
349 unwrap(cg)->setDiagnosticHandler(diag_handler, ctxt);
350 }
351
createCodeGen(bool InLocalContext)352 static lto_code_gen_t createCodeGen(bool InLocalContext) {
353 lto_initialize();
354
355 TargetOptions Options = codegen::InitTargetOptionsFromCodeGenFlags(Triple());
356
357 LibLTOCodeGenerator *CodeGen =
358 InLocalContext ? new LibLTOCodeGenerator(std::make_unique<LLVMContext>())
359 : new LibLTOCodeGenerator();
360 CodeGen->setTargetOptions(Options);
361 return wrap(CodeGen);
362 }
363
lto_codegen_create(void)364 lto_code_gen_t lto_codegen_create(void) {
365 return createCodeGen(/* InLocalContext */ false);
366 }
367
lto_codegen_create_in_local_context(void)368 lto_code_gen_t lto_codegen_create_in_local_context(void) {
369 return createCodeGen(/* InLocalContext */ true);
370 }
371
lto_codegen_dispose(lto_code_gen_t cg)372 void lto_codegen_dispose(lto_code_gen_t cg) { delete unwrap(cg); }
373
lto_codegen_add_module(lto_code_gen_t cg,lto_module_t mod)374 bool lto_codegen_add_module(lto_code_gen_t cg, lto_module_t mod) {
375 return !unwrap(cg)->addModule(unwrap(mod));
376 }
377
lto_codegen_set_module(lto_code_gen_t cg,lto_module_t mod)378 void lto_codegen_set_module(lto_code_gen_t cg, lto_module_t mod) {
379 unwrap(cg)->setModule(std::unique_ptr<LTOModule>(unwrap(mod)));
380 }
381
lto_codegen_set_debug_model(lto_code_gen_t cg,lto_debug_model debug)382 bool lto_codegen_set_debug_model(lto_code_gen_t cg, lto_debug_model debug) {
383 unwrap(cg)->setDebugInfo(debug);
384 return false;
385 }
386
lto_codegen_set_pic_model(lto_code_gen_t cg,lto_codegen_model model)387 bool lto_codegen_set_pic_model(lto_code_gen_t cg, lto_codegen_model model) {
388 switch (model) {
389 case LTO_CODEGEN_PIC_MODEL_STATIC:
390 unwrap(cg)->setCodePICModel(Reloc::Static);
391 return false;
392 case LTO_CODEGEN_PIC_MODEL_DYNAMIC:
393 unwrap(cg)->setCodePICModel(Reloc::PIC_);
394 return false;
395 case LTO_CODEGEN_PIC_MODEL_DYNAMIC_NO_PIC:
396 unwrap(cg)->setCodePICModel(Reloc::DynamicNoPIC);
397 return false;
398 case LTO_CODEGEN_PIC_MODEL_DEFAULT:
399 unwrap(cg)->setCodePICModel(None);
400 return false;
401 }
402 sLastErrorString = "Unknown PIC model";
403 return true;
404 }
405
lto_codegen_set_cpu(lto_code_gen_t cg,const char * cpu)406 void lto_codegen_set_cpu(lto_code_gen_t cg, const char *cpu) {
407 return unwrap(cg)->setCpu(cpu);
408 }
409
lto_codegen_set_assembler_path(lto_code_gen_t cg,const char * path)410 void lto_codegen_set_assembler_path(lto_code_gen_t cg, const char *path) {
411 // In here only for backwards compatibility. We use MC now.
412 }
413
lto_codegen_set_assembler_args(lto_code_gen_t cg,const char ** args,int nargs)414 void lto_codegen_set_assembler_args(lto_code_gen_t cg, const char **args,
415 int nargs) {
416 // In here only for backwards compatibility. We use MC now.
417 }
418
lto_codegen_add_must_preserve_symbol(lto_code_gen_t cg,const char * symbol)419 void lto_codegen_add_must_preserve_symbol(lto_code_gen_t cg,
420 const char *symbol) {
421 unwrap(cg)->addMustPreserveSymbol(symbol);
422 }
423
maybeParseOptions(lto_code_gen_t cg)424 static void maybeParseOptions(lto_code_gen_t cg) {
425 if (optionParsingState != OptParsingState::Done) {
426 // Parse options if any were set by the lto_codegen_debug_options* function.
427 unwrap(cg)->parseCodeGenDebugOptions();
428 lto_add_attrs(cg);
429 optionParsingState = OptParsingState::Done;
430 }
431 }
432
lto_codegen_write_merged_modules(lto_code_gen_t cg,const char * path)433 bool lto_codegen_write_merged_modules(lto_code_gen_t cg, const char *path) {
434 maybeParseOptions(cg);
435 return !unwrap(cg)->writeMergedModules(path);
436 }
437
lto_codegen_compile(lto_code_gen_t cg,size_t * length)438 const void *lto_codegen_compile(lto_code_gen_t cg, size_t *length) {
439 maybeParseOptions(cg);
440 LibLTOCodeGenerator *CG = unwrap(cg);
441 CG->NativeObjectFile = CG->compile();
442 if (!CG->NativeObjectFile)
443 return nullptr;
444 *length = CG->NativeObjectFile->getBufferSize();
445 return CG->NativeObjectFile->getBufferStart();
446 }
447
lto_codegen_optimize(lto_code_gen_t cg)448 bool lto_codegen_optimize(lto_code_gen_t cg) {
449 maybeParseOptions(cg);
450 return !unwrap(cg)->optimize();
451 }
452
lto_codegen_compile_optimized(lto_code_gen_t cg,size_t * length)453 const void *lto_codegen_compile_optimized(lto_code_gen_t cg, size_t *length) {
454 maybeParseOptions(cg);
455 LibLTOCodeGenerator *CG = unwrap(cg);
456 CG->NativeObjectFile = CG->compileOptimized();
457 if (!CG->NativeObjectFile)
458 return nullptr;
459 *length = CG->NativeObjectFile->getBufferSize();
460 return CG->NativeObjectFile->getBufferStart();
461 }
462
lto_codegen_compile_to_file(lto_code_gen_t cg,const char ** name)463 bool lto_codegen_compile_to_file(lto_code_gen_t cg, const char **name) {
464 maybeParseOptions(cg);
465 return !unwrap(cg)->compile_to_file(name);
466 }
467
lto_set_debug_options(const char * const * options,int number)468 void lto_set_debug_options(const char *const *options, int number) {
469 assert(optionParsingState == OptParsingState::NotParsed &&
470 "option processing already happened");
471 // Need to put each suboption in a null-terminated string before passing to
472 // parseCommandLineOptions().
473 std::vector<std::string> Options;
474 for (int i = 0; i < number; ++i)
475 Options.push_back(options[i]);
476
477 llvm::parseCommandLineOptions(Options);
478 optionParsingState = OptParsingState::Early;
479 }
480
lto_codegen_debug_options(lto_code_gen_t cg,const char * opt)481 void lto_codegen_debug_options(lto_code_gen_t cg, const char *opt) {
482 assert(optionParsingState != OptParsingState::Early &&
483 "early option processing already happened");
484 SmallVector<StringRef, 4> Options;
485 for (std::pair<StringRef, StringRef> o = getToken(opt); !o.first.empty();
486 o = getToken(o.second))
487 Options.push_back(o.first);
488
489 unwrap(cg)->setCodeGenDebugOptions(Options);
490 }
491
lto_codegen_debug_options_array(lto_code_gen_t cg,const char * const * options,int number)492 void lto_codegen_debug_options_array(lto_code_gen_t cg,
493 const char *const *options, int number) {
494 assert(optionParsingState != OptParsingState::Early &&
495 "early option processing already happened");
496 SmallVector<StringRef, 4> Options;
497 for (int i = 0; i < number; ++i)
498 Options.push_back(options[i]);
499 unwrap(cg)->setCodeGenDebugOptions(makeArrayRef(Options));
500 }
501
lto_api_version()502 unsigned int lto_api_version() { return LTO_API_VERSION; }
503
lto_codegen_set_should_internalize(lto_code_gen_t cg,bool ShouldInternalize)504 void lto_codegen_set_should_internalize(lto_code_gen_t cg,
505 bool ShouldInternalize) {
506 unwrap(cg)->setShouldInternalize(ShouldInternalize);
507 }
508
lto_codegen_set_should_embed_uselists(lto_code_gen_t cg,lto_bool_t ShouldEmbedUselists)509 void lto_codegen_set_should_embed_uselists(lto_code_gen_t cg,
510 lto_bool_t ShouldEmbedUselists) {
511 unwrap(cg)->setShouldEmbedUselists(ShouldEmbedUselists);
512 }
513
514 // ThinLTO API below
515
thinlto_create_codegen(void)516 thinlto_code_gen_t thinlto_create_codegen(void) {
517 lto_initialize();
518 ThinLTOCodeGenerator *CodeGen = new ThinLTOCodeGenerator();
519 CodeGen->setTargetOptions(
520 codegen::InitTargetOptionsFromCodeGenFlags(Triple()));
521 CodeGen->setFreestanding(EnableFreestanding);
522
523 if (OptLevel.getNumOccurrences()) {
524 if (OptLevel < '0' || OptLevel > '3')
525 report_fatal_error("Optimization level must be between 0 and 3");
526 CodeGen->setOptLevel(OptLevel - '0');
527 switch (OptLevel) {
528 case '0':
529 CodeGen->setCodeGenOptLevel(CodeGenOpt::None);
530 break;
531 case '1':
532 CodeGen->setCodeGenOptLevel(CodeGenOpt::Less);
533 break;
534 case '2':
535 CodeGen->setCodeGenOptLevel(CodeGenOpt::Default);
536 break;
537 case '3':
538 CodeGen->setCodeGenOptLevel(CodeGenOpt::Aggressive);
539 break;
540 }
541 }
542 return wrap(CodeGen);
543 }
544
thinlto_codegen_dispose(thinlto_code_gen_t cg)545 void thinlto_codegen_dispose(thinlto_code_gen_t cg) { delete unwrap(cg); }
546
thinlto_codegen_add_module(thinlto_code_gen_t cg,const char * Identifier,const char * Data,int Length)547 void thinlto_codegen_add_module(thinlto_code_gen_t cg, const char *Identifier,
548 const char *Data, int Length) {
549 unwrap(cg)->addModule(Identifier, StringRef(Data, Length));
550 }
551
thinlto_codegen_process(thinlto_code_gen_t cg)552 void thinlto_codegen_process(thinlto_code_gen_t cg) { unwrap(cg)->run(); }
553
thinlto_module_get_num_objects(thinlto_code_gen_t cg)554 unsigned int thinlto_module_get_num_objects(thinlto_code_gen_t cg) {
555 return unwrap(cg)->getProducedBinaries().size();
556 }
thinlto_module_get_object(thinlto_code_gen_t cg,unsigned int index)557 LTOObjectBuffer thinlto_module_get_object(thinlto_code_gen_t cg,
558 unsigned int index) {
559 assert(index < unwrap(cg)->getProducedBinaries().size() && "Index overflow");
560 auto &MemBuffer = unwrap(cg)->getProducedBinaries()[index];
561 return LTOObjectBuffer{MemBuffer->getBufferStart(),
562 MemBuffer->getBufferSize()};
563 }
564
thinlto_module_get_num_object_files(thinlto_code_gen_t cg)565 unsigned int thinlto_module_get_num_object_files(thinlto_code_gen_t cg) {
566 return unwrap(cg)->getProducedBinaryFiles().size();
567 }
thinlto_module_get_object_file(thinlto_code_gen_t cg,unsigned int index)568 const char *thinlto_module_get_object_file(thinlto_code_gen_t cg,
569 unsigned int index) {
570 assert(index < unwrap(cg)->getProducedBinaryFiles().size() &&
571 "Index overflow");
572 return unwrap(cg)->getProducedBinaryFiles()[index].c_str();
573 }
574
thinlto_codegen_disable_codegen(thinlto_code_gen_t cg,lto_bool_t disable)575 void thinlto_codegen_disable_codegen(thinlto_code_gen_t cg,
576 lto_bool_t disable) {
577 unwrap(cg)->disableCodeGen(disable);
578 }
579
thinlto_codegen_set_codegen_only(thinlto_code_gen_t cg,lto_bool_t CodeGenOnly)580 void thinlto_codegen_set_codegen_only(thinlto_code_gen_t cg,
581 lto_bool_t CodeGenOnly) {
582 unwrap(cg)->setCodeGenOnly(CodeGenOnly);
583 }
584
thinlto_debug_options(const char * const * options,int number)585 void thinlto_debug_options(const char *const *options, int number) {
586 // if options were requested, set them
587 if (number && options) {
588 std::vector<const char *> CodegenArgv(1, "libLTO");
589 append_range(CodegenArgv, ArrayRef<const char *>(options, number));
590 cl::ParseCommandLineOptions(CodegenArgv.size(), CodegenArgv.data());
591 }
592 }
593
lto_module_is_thinlto(lto_module_t mod)594 lto_bool_t lto_module_is_thinlto(lto_module_t mod) {
595 return unwrap(mod)->isThinLTO();
596 }
597
thinlto_codegen_add_must_preserve_symbol(thinlto_code_gen_t cg,const char * Name,int Length)598 void thinlto_codegen_add_must_preserve_symbol(thinlto_code_gen_t cg,
599 const char *Name, int Length) {
600 unwrap(cg)->preserveSymbol(StringRef(Name, Length));
601 }
602
thinlto_codegen_add_cross_referenced_symbol(thinlto_code_gen_t cg,const char * Name,int Length)603 void thinlto_codegen_add_cross_referenced_symbol(thinlto_code_gen_t cg,
604 const char *Name, int Length) {
605 unwrap(cg)->crossReferenceSymbol(StringRef(Name, Length));
606 }
607
thinlto_codegen_set_cpu(thinlto_code_gen_t cg,const char * cpu)608 void thinlto_codegen_set_cpu(thinlto_code_gen_t cg, const char *cpu) {
609 return unwrap(cg)->setCpu(cpu);
610 }
611
thinlto_codegen_set_cache_dir(thinlto_code_gen_t cg,const char * cache_dir)612 void thinlto_codegen_set_cache_dir(thinlto_code_gen_t cg,
613 const char *cache_dir) {
614 return unwrap(cg)->setCacheDir(cache_dir);
615 }
616
thinlto_codegen_set_cache_pruning_interval(thinlto_code_gen_t cg,int interval)617 void thinlto_codegen_set_cache_pruning_interval(thinlto_code_gen_t cg,
618 int interval) {
619 return unwrap(cg)->setCachePruningInterval(interval);
620 }
621
thinlto_codegen_set_cache_entry_expiration(thinlto_code_gen_t cg,unsigned expiration)622 void thinlto_codegen_set_cache_entry_expiration(thinlto_code_gen_t cg,
623 unsigned expiration) {
624 return unwrap(cg)->setCacheEntryExpiration(expiration);
625 }
626
thinlto_codegen_set_final_cache_size_relative_to_available_space(thinlto_code_gen_t cg,unsigned Percentage)627 void thinlto_codegen_set_final_cache_size_relative_to_available_space(
628 thinlto_code_gen_t cg, unsigned Percentage) {
629 return unwrap(cg)->setMaxCacheSizeRelativeToAvailableSpace(Percentage);
630 }
631
thinlto_codegen_set_cache_size_bytes(thinlto_code_gen_t cg,unsigned MaxSizeBytes)632 void thinlto_codegen_set_cache_size_bytes(
633 thinlto_code_gen_t cg, unsigned MaxSizeBytes) {
634 return unwrap(cg)->setCacheMaxSizeBytes(MaxSizeBytes);
635 }
636
thinlto_codegen_set_cache_size_megabytes(thinlto_code_gen_t cg,unsigned MaxSizeMegabytes)637 void thinlto_codegen_set_cache_size_megabytes(
638 thinlto_code_gen_t cg, unsigned MaxSizeMegabytes) {
639 uint64_t MaxSizeBytes = MaxSizeMegabytes;
640 MaxSizeBytes *= 1024 * 1024;
641 return unwrap(cg)->setCacheMaxSizeBytes(MaxSizeBytes);
642 }
643
thinlto_codegen_set_cache_size_files(thinlto_code_gen_t cg,unsigned MaxSizeFiles)644 void thinlto_codegen_set_cache_size_files(
645 thinlto_code_gen_t cg, unsigned MaxSizeFiles) {
646 return unwrap(cg)->setCacheMaxSizeFiles(MaxSizeFiles);
647 }
648
thinlto_codegen_set_savetemps_dir(thinlto_code_gen_t cg,const char * save_temps_dir)649 void thinlto_codegen_set_savetemps_dir(thinlto_code_gen_t cg,
650 const char *save_temps_dir) {
651 return unwrap(cg)->setSaveTempsDir(save_temps_dir);
652 }
653
thinlto_set_generated_objects_dir(thinlto_code_gen_t cg,const char * save_temps_dir)654 void thinlto_set_generated_objects_dir(thinlto_code_gen_t cg,
655 const char *save_temps_dir) {
656 unwrap(cg)->setGeneratedObjectsDirectory(save_temps_dir);
657 }
658
thinlto_codegen_set_pic_model(thinlto_code_gen_t cg,lto_codegen_model model)659 lto_bool_t thinlto_codegen_set_pic_model(thinlto_code_gen_t cg,
660 lto_codegen_model model) {
661 switch (model) {
662 case LTO_CODEGEN_PIC_MODEL_STATIC:
663 unwrap(cg)->setCodePICModel(Reloc::Static);
664 return false;
665 case LTO_CODEGEN_PIC_MODEL_DYNAMIC:
666 unwrap(cg)->setCodePICModel(Reloc::PIC_);
667 return false;
668 case LTO_CODEGEN_PIC_MODEL_DYNAMIC_NO_PIC:
669 unwrap(cg)->setCodePICModel(Reloc::DynamicNoPIC);
670 return false;
671 case LTO_CODEGEN_PIC_MODEL_DEFAULT:
672 unwrap(cg)->setCodePICModel(None);
673 return false;
674 }
675 sLastErrorString = "Unknown PIC model";
676 return true;
677 }
678
DEFINE_SIMPLE_CONVERSION_FUNCTIONS(lto::InputFile,lto_input_t)679 DEFINE_SIMPLE_CONVERSION_FUNCTIONS(lto::InputFile, lto_input_t)
680
681 lto_input_t lto_input_create(const void *buffer, size_t buffer_size, const char *path) {
682 return wrap(LTOModule::createInputFile(buffer, buffer_size, path, sLastErrorString));
683 }
684
lto_input_dispose(lto_input_t input)685 void lto_input_dispose(lto_input_t input) {
686 delete unwrap(input);
687 }
688
lto_input_get_num_dependent_libraries(lto_input_t input)689 extern unsigned lto_input_get_num_dependent_libraries(lto_input_t input) {
690 return LTOModule::getDependentLibraryCount(unwrap(input));
691 }
692
lto_input_get_dependent_library(lto_input_t input,size_t index,size_t * size)693 extern const char *lto_input_get_dependent_library(lto_input_t input,
694 size_t index,
695 size_t *size) {
696 return LTOModule::getDependentLibrary(unwrap(input), index, size);
697 }
698
lto_runtime_lib_symbols_list(size_t * size)699 extern const char *const *lto_runtime_lib_symbols_list(size_t *size) {
700 auto symbols = lto::LTO::getRuntimeLibcallSymbols();
701 *size = symbols.size();
702 return symbols.data();
703 }
704