compiler_driver.h revision 33083d626dbf2c8b06badfd73f50e98114483059
1/* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#ifndef ART_COMPILER_DRIVER_COMPILER_DRIVER_H_ 18#define ART_COMPILER_DRIVER_COMPILER_DRIVER_H_ 19 20#include <set> 21#include <string> 22#include <unordered_set> 23#include <vector> 24 25#include "arch/instruction_set.h" 26#include "base/arena_allocator.h" 27#include "base/array_ref.h" 28#include "base/bit_utils.h" 29#include "base/mutex.h" 30#include "base/timing_logger.h" 31#include "class_reference.h" 32#include "compiler.h" 33#include "dex_file.h" 34#include "dex_file_types.h" 35#include "driver/compiled_method_storage.h" 36#include "jit/profile_compilation_info.h" 37#include "invoke_type.h" 38#include "method_reference.h" 39#include "mirror/class.h" // For mirror::Class::Status. 40#include "os.h" 41#include "runtime.h" 42#include "safe_map.h" 43#include "thread_pool.h" 44#include "utils/atomic_method_ref_map.h" 45#include "utils/dex_cache_arrays_layout.h" 46 47namespace art { 48 49namespace mirror { 50class DexCache; 51} // namespace mirror 52 53namespace verifier { 54class MethodVerifier; 55class VerifierDepsTest; 56} // namespace verifier 57 58class BitVector; 59class CompiledClass; 60class CompiledMethod; 61class CompilerOptions; 62class DexCompilationUnit; 63struct InlineIGetIPutData; 64class InstructionSetFeatures; 65class ParallelCompilationManager; 66class ScopedObjectAccess; 67template <class Allocator> class SrcMap; 68class SrcMapElem; 69using SwapSrcMap = SrcMap<SwapAllocator<SrcMapElem>>; 70template<class T> class Handle; 71class TimingLogger; 72class VdexFile; 73class VerificationResults; 74class VerifiedMethod; 75 76enum EntryPointCallingConvention { 77 // ABI of invocations to a method's interpreter entry point. 78 kInterpreterAbi, 79 // ABI of calls to a method's native code, only used for native methods. 80 kJniAbi, 81 // ABI of calls to a method's quick code entry point. 82 kQuickAbi 83}; 84 85class CompilerDriver { 86 public: 87 // Create a compiler targeting the requested "instruction_set". 88 // "image" should be true if image specific optimizations should be 89 // enabled. "image_classes" lets the compiler know what classes it 90 // can assume will be in the image, with null implying all available 91 // classes. 92 CompilerDriver(const CompilerOptions* compiler_options, 93 VerificationResults* verification_results, 94 Compiler::Kind compiler_kind, 95 InstructionSet instruction_set, 96 const InstructionSetFeatures* instruction_set_features, 97 std::unordered_set<std::string>* image_classes, 98 std::unordered_set<std::string>* compiled_classes, 99 std::unordered_set<std::string>* compiled_methods, 100 size_t thread_count, 101 bool dump_stats, 102 bool dump_passes, 103 CumulativeLogger* timer, 104 int swap_fd, 105 const ProfileCompilationInfo* profile_compilation_info); 106 107 ~CompilerDriver(); 108 109 // Set dex files that will be stored in the oat file after being compiled. 110 void SetDexFilesForOatFile(const std::vector<const DexFile*>& dex_files) { 111 dex_files_for_oat_file_ = &dex_files; 112 } 113 114 // Get dex file that will be stored in the oat file after being compiled. 115 ArrayRef<const DexFile* const> GetDexFilesForOatFile() const { 116 return (dex_files_for_oat_file_ != nullptr) 117 ? ArrayRef<const DexFile* const>(*dex_files_for_oat_file_) 118 : ArrayRef<const DexFile* const>(); 119 } 120 121 void CompileAll(jobject class_loader, 122 const std::vector<const DexFile*>& dex_files, 123 TimingLogger* timings) 124 REQUIRES(!Locks::mutator_lock_, !compiled_classes_lock_, !dex_to_dex_references_lock_); 125 126 void CompileAll(jobject class_loader, 127 const std::vector<const DexFile*>& dex_files, 128 VdexFile* vdex_file, 129 TimingLogger* timings) 130 REQUIRES(!Locks::mutator_lock_, !compiled_classes_lock_, !dex_to_dex_references_lock_); 131 132 // Compile a single Method. 133 void CompileOne(Thread* self, ArtMethod* method, TimingLogger* timings) 134 REQUIRES_SHARED(Locks::mutator_lock_) 135 REQUIRES(!compiled_classes_lock_, !dex_to_dex_references_lock_); 136 137 VerificationResults* GetVerificationResults() const { 138 DCHECK(Runtime::Current()->IsAotCompiler()); 139 return verification_results_; 140 } 141 142 InstructionSet GetInstructionSet() const { 143 return instruction_set_; 144 } 145 146 const InstructionSetFeatures* GetInstructionSetFeatures() const { 147 return instruction_set_features_; 148 } 149 150 const CompilerOptions& GetCompilerOptions() const { 151 return *compiler_options_; 152 } 153 154 Compiler* GetCompiler() const { 155 return compiler_.get(); 156 } 157 158 const std::unordered_set<std::string>* GetImageClasses() const { 159 return image_classes_.get(); 160 } 161 162 // Generate the trampolines that are invoked by unresolved direct methods. 163 std::unique_ptr<const std::vector<uint8_t>> CreateJniDlsymLookup() const; 164 std::unique_ptr<const std::vector<uint8_t>> CreateQuickGenericJniTrampoline() const; 165 std::unique_ptr<const std::vector<uint8_t>> CreateQuickImtConflictTrampoline() const; 166 std::unique_ptr<const std::vector<uint8_t>> CreateQuickResolutionTrampoline() const; 167 std::unique_ptr<const std::vector<uint8_t>> CreateQuickToInterpreterBridge() const; 168 169 CompiledClass* GetCompiledClass(ClassReference ref) const 170 REQUIRES(!compiled_classes_lock_); 171 172 CompiledMethod* GetCompiledMethod(MethodReference ref) const; 173 size_t GetNonRelativeLinkerPatchCount() const; 174 // Add a compiled method. 175 void AddCompiledMethod(const MethodReference& method_ref, 176 CompiledMethod* const compiled_method, 177 size_t non_relative_linker_patch_count); 178 179 void SetRequiresConstructorBarrier(Thread* self, 180 const DexFile* dex_file, 181 uint16_t class_def_index, 182 bool requires) 183 REQUIRES(!requires_constructor_barrier_lock_); 184 bool RequiresConstructorBarrier(Thread* self, 185 const DexFile* dex_file, 186 uint16_t class_def_index) 187 REQUIRES(!requires_constructor_barrier_lock_); 188 189 // Are runtime access checks necessary in the compiled code? 190 bool CanAccessTypeWithoutChecks(uint32_t referrer_idx, 191 Handle<mirror::DexCache> dex_cache, 192 dex::TypeIndex type_idx) 193 REQUIRES_SHARED(Locks::mutator_lock_); 194 195 // Are runtime access and instantiable checks necessary in the code? 196 // out_is_finalizable is set to whether the type is finalizable. 197 bool CanAccessInstantiableTypeWithoutChecks(uint32_t referrer_idx, 198 Handle<mirror::DexCache> dex_cache, 199 dex::TypeIndex type_idx, 200 bool* out_is_finalizable) 201 REQUIRES_SHARED(Locks::mutator_lock_); 202 203 // Resolve compiling method's class. Returns null on failure. 204 mirror::Class* ResolveCompilingMethodsClass( 205 const ScopedObjectAccess& soa, Handle<mirror::DexCache> dex_cache, 206 Handle<mirror::ClassLoader> class_loader, const DexCompilationUnit* mUnit) 207 REQUIRES_SHARED(Locks::mutator_lock_); 208 209 mirror::Class* ResolveClass( 210 const ScopedObjectAccess& soa, Handle<mirror::DexCache> dex_cache, 211 Handle<mirror::ClassLoader> class_loader, dex::TypeIndex type_index, 212 const DexCompilationUnit* mUnit) 213 REQUIRES_SHARED(Locks::mutator_lock_); 214 215 // Resolve a field. Returns null on failure, including incompatible class change. 216 // NOTE: Unlike ClassLinker's ResolveField(), this method enforces is_static. 217 ArtField* ResolveField( 218 const ScopedObjectAccess& soa, Handle<mirror::DexCache> dex_cache, 219 Handle<mirror::ClassLoader> class_loader, const DexCompilationUnit* mUnit, 220 uint32_t field_idx, bool is_static) 221 REQUIRES_SHARED(Locks::mutator_lock_); 222 223 // Resolve a field with a given dex file. 224 ArtField* ResolveFieldWithDexFile( 225 const ScopedObjectAccess& soa, Handle<mirror::DexCache> dex_cache, 226 Handle<mirror::ClassLoader> class_loader, const DexFile* dex_file, 227 uint32_t field_idx, bool is_static) 228 REQUIRES_SHARED(Locks::mutator_lock_); 229 230 // Can we fast-path an IGET/IPUT access to an instance field? If yes, compute the field offset. 231 std::pair<bool, bool> IsFastInstanceField( 232 mirror::DexCache* dex_cache, mirror::Class* referrer_class, 233 ArtField* resolved_field, uint16_t field_idx) 234 REQUIRES_SHARED(Locks::mutator_lock_); 235 236 // Can we fast-path an SGET/SPUT access to a static field? If yes, compute the type index 237 // of the declaring class in the referrer's dex file. 238 std::pair<bool, bool> IsFastStaticField(mirror::DexCache* dex_cache, 239 mirror::Class* referrer_class, 240 ArtField* resolved_field, 241 uint16_t field_idx, 242 dex::TypeIndex* storage_index) 243 REQUIRES_SHARED(Locks::mutator_lock_); 244 245 // Return whether the declaring class of `resolved_method` is 246 // available to `referrer_class`. If this is true, compute the type 247 // index of the declaring class in the referrer's dex file and 248 // return it through the out argument `storage_index`; otherwise 249 // return DexFile::kDexNoIndex through `storage_index`. 250 bool IsClassOfStaticMethodAvailableToReferrer(mirror::DexCache* dex_cache, 251 mirror::Class* referrer_class, 252 ArtMethod* resolved_method, 253 uint16_t method_idx, 254 dex::TypeIndex* storage_index) 255 REQUIRES_SHARED(Locks::mutator_lock_); 256 257 // Resolve a method. Returns null on failure, including incompatible class change. 258 ArtMethod* ResolveMethod( 259 ScopedObjectAccess& soa, Handle<mirror::DexCache> dex_cache, 260 Handle<mirror::ClassLoader> class_loader, const DexCompilationUnit* mUnit, 261 uint32_t method_idx, InvokeType invoke_type, bool check_incompatible_class_change = true) 262 REQUIRES_SHARED(Locks::mutator_lock_); 263 264 void ProcessedInstanceField(bool resolved); 265 void ProcessedStaticField(bool resolved, bool local); 266 267 // Can we fast path instance field access? Computes field's offset and volatility. 268 bool ComputeInstanceFieldInfo(uint32_t field_idx, const DexCompilationUnit* mUnit, bool is_put, 269 MemberOffset* field_offset, bool* is_volatile) 270 REQUIRES(!Locks::mutator_lock_); 271 272 ArtField* ComputeInstanceFieldInfo(uint32_t field_idx, 273 const DexCompilationUnit* mUnit, 274 bool is_put, 275 const ScopedObjectAccess& soa) 276 REQUIRES_SHARED(Locks::mutator_lock_); 277 278 279 const VerifiedMethod* GetVerifiedMethod(const DexFile* dex_file, uint32_t method_idx) const; 280 bool IsSafeCast(const DexCompilationUnit* mUnit, uint32_t dex_pc); 281 282 bool GetSupportBootImageFixup() const { 283 return support_boot_image_fixup_; 284 } 285 286 void SetSupportBootImageFixup(bool support_boot_image_fixup) { 287 support_boot_image_fixup_ = support_boot_image_fixup; 288 } 289 290 void SetCompilerContext(void* compiler_context) { 291 compiler_context_ = compiler_context; 292 } 293 294 void* GetCompilerContext() const { 295 return compiler_context_; 296 } 297 298 size_t GetThreadCount() const { 299 return parallel_thread_count_; 300 } 301 302 bool GetDumpStats() const { 303 return dump_stats_; 304 } 305 306 bool GetDumpPasses() const { 307 return dump_passes_; 308 } 309 310 CumulativeLogger* GetTimingsLogger() const { 311 return timings_logger_; 312 } 313 314 void SetDedupeEnabled(bool dedupe_enabled) { 315 compiled_method_storage_.SetDedupeEnabled(dedupe_enabled); 316 } 317 318 bool DedupeEnabled() const { 319 return compiled_method_storage_.DedupeEnabled(); 320 } 321 322 // Checks if class specified by type_idx is one of the image_classes_ 323 bool IsImageClass(const char* descriptor) const; 324 325 // Checks whether the provided class should be compiled, i.e., is in classes_to_compile_. 326 bool IsClassToCompile(const char* descriptor) const; 327 328 // Checks whether the provided method should be compiled, i.e., is in method_to_compile_. 329 bool IsMethodToCompile(const MethodReference& method_ref) const; 330 331 // Checks whether profile guided compilation is enabled and if the method should be compiled 332 // according to the profile file. 333 bool ShouldCompileBasedOnProfile(const MethodReference& method_ref) const; 334 335 // Checks whether profile guided verification is enabled and if the method should be verified 336 // according to the profile file. 337 bool ShouldVerifyClassBasedOnProfile(const DexFile& dex_file, uint16_t class_idx) const; 338 339 void RecordClassStatus(ClassReference ref, mirror::Class::Status status) 340 REQUIRES(!compiled_classes_lock_); 341 342 // Checks if the specified method has been verified without failures. Returns 343 // false if the method is not in the verification results (GetVerificationResults). 344 bool IsMethodVerifiedWithoutFailures(uint32_t method_idx, 345 uint16_t class_def_idx, 346 const DexFile& dex_file) const; 347 348 // Get memory usage during compilation. 349 std::string GetMemoryUsageString(bool extended) const; 350 351 void SetHadHardVerifierFailure() { 352 had_hard_verifier_failure_ = true; 353 } 354 355 Compiler::Kind GetCompilerKind() { 356 return compiler_kind_; 357 } 358 359 CompiledMethodStorage* GetCompiledMethodStorage() { 360 return &compiled_method_storage_; 361 } 362 363 // Can we assume that the klass is loaded? 364 bool CanAssumeClassIsLoaded(mirror::Class* klass) 365 REQUIRES_SHARED(Locks::mutator_lock_); 366 367 bool MayInline(const DexFile* inlined_from, const DexFile* inlined_into) const { 368 if (!kIsTargetBuild) { 369 return MayInlineInternal(inlined_from, inlined_into); 370 } 371 return true; 372 } 373 374 void MarkForDexToDexCompilation(Thread* self, const MethodReference& method_ref) 375 REQUIRES(!dex_to_dex_references_lock_); 376 377 const BitVector* GetCurrentDexToDexMethods() const { 378 return current_dex_to_dex_methods_; 379 } 380 381 private: 382 // Return whether the declaring class of `resolved_member` is 383 // available to `referrer_class` for read or write access using two 384 // Boolean values returned as a pair. If is true at least for read 385 // access, compute the type index of the declaring class in the 386 // referrer's dex file and return it through the out argument 387 // `storage_index`; otherwise return DexFile::kDexNoIndex through 388 // `storage_index`. 389 template <typename ArtMember> 390 std::pair<bool, bool> IsClassOfStaticMemberAvailableToReferrer(mirror::DexCache* dex_cache, 391 mirror::Class* referrer_class, 392 ArtMember* resolved_member, 393 uint16_t member_idx, 394 dex::TypeIndex* storage_index) 395 REQUIRES_SHARED(Locks::mutator_lock_); 396 397 // Can `referrer_class` access the resolved `member`? 398 // Dispatch call to mirror::Class::CanAccessResolvedField or 399 // mirror::Class::CanAccessResolvedMember depending on the value of 400 // ArtMember. 401 template <typename ArtMember> 402 static bool CanAccessResolvedMember(mirror::Class* referrer_class, 403 mirror::Class* access_to, 404 ArtMember* member, 405 mirror::DexCache* dex_cache, 406 uint32_t field_idx) 407 REQUIRES_SHARED(Locks::mutator_lock_); 408 409 mirror::ClassLoader* GetClassLoader(const ScopedObjectAccess& soa, 410 const DexCompilationUnit* mUnit) 411 REQUIRES_SHARED(Locks::mutator_lock_); 412 413 private: 414 void PreCompile(jobject class_loader, 415 const std::vector<const DexFile*>& dex_files, 416 TimingLogger* timings) 417 REQUIRES(!Locks::mutator_lock_, !compiled_classes_lock_); 418 419 void LoadImageClasses(TimingLogger* timings) REQUIRES(!Locks::mutator_lock_); 420 421 // Attempt to resolve all type, methods, fields, and strings 422 // referenced from code in the dex file following PathClassLoader 423 // ordering semantics. 424 void Resolve(jobject class_loader, 425 const std::vector<const DexFile*>& dex_files, 426 TimingLogger* timings) 427 REQUIRES(!Locks::mutator_lock_); 428 void ResolveDexFile(jobject class_loader, 429 const DexFile& dex_file, 430 const std::vector<const DexFile*>& dex_files, 431 ThreadPool* thread_pool, 432 size_t thread_count, 433 TimingLogger* timings) 434 REQUIRES(!Locks::mutator_lock_); 435 436 // Do fast verification through VerifierDeps if possible. Return whether 437 // verification was successful. 438 // NO_THREAD_SAFETY_ANALYSIS as the method accesses a guarded value in a 439 // single-threaded way. 440 bool FastVerify(jobject class_loader, 441 const std::vector<const DexFile*>& dex_files, 442 TimingLogger* timings) 443 NO_THREAD_SAFETY_ANALYSIS; 444 445 void Verify(jobject class_loader, 446 const std::vector<const DexFile*>& dex_files, 447 TimingLogger* timings); 448 449 void VerifyDexFile(jobject class_loader, 450 const DexFile& dex_file, 451 const std::vector<const DexFile*>& dex_files, 452 ThreadPool* thread_pool, 453 size_t thread_count, 454 TimingLogger* timings) 455 REQUIRES(!Locks::mutator_lock_); 456 457 void SetVerified(jobject class_loader, 458 const std::vector<const DexFile*>& dex_files, 459 TimingLogger* timings); 460 void SetVerifiedDexFile(jobject class_loader, 461 const DexFile& dex_file, 462 const std::vector<const DexFile*>& dex_files, 463 ThreadPool* thread_pool, 464 size_t thread_count, 465 TimingLogger* timings) 466 REQUIRES(!Locks::mutator_lock_); 467 468 void InitializeClasses(jobject class_loader, 469 const std::vector<const DexFile*>& dex_files, 470 TimingLogger* timings) 471 REQUIRES(!Locks::mutator_lock_, !compiled_classes_lock_); 472 void InitializeClasses(jobject class_loader, 473 const DexFile& dex_file, 474 const std::vector<const DexFile*>& dex_files, 475 TimingLogger* timings) 476 REQUIRES(!Locks::mutator_lock_, !compiled_classes_lock_); 477 478 void UpdateImageClasses(TimingLogger* timings) REQUIRES(!Locks::mutator_lock_); 479 480 void Compile(jobject class_loader, 481 const std::vector<const DexFile*>& dex_files, 482 TimingLogger* timings) REQUIRES(!dex_to_dex_references_lock_); 483 void CompileDexFile(jobject class_loader, 484 const DexFile& dex_file, 485 const std::vector<const DexFile*>& dex_files, 486 ThreadPool* thread_pool, 487 size_t thread_count, 488 TimingLogger* timings) 489 REQUIRES(!Locks::mutator_lock_); 490 491 bool MayInlineInternal(const DexFile* inlined_from, const DexFile* inlined_into) const; 492 493 void InitializeThreadPools(); 494 void FreeThreadPools(); 495 void CheckThreadPools(); 496 497 bool RequiresConstructorBarrier(const DexFile& dex_file, uint16_t class_def_idx) const; 498 499 const CompilerOptions* const compiler_options_; 500 VerificationResults* const verification_results_; 501 502 std::unique_ptr<Compiler> compiler_; 503 Compiler::Kind compiler_kind_; 504 505 const InstructionSet instruction_set_; 506 const InstructionSetFeatures* const instruction_set_features_; 507 508 // All class references that require constructor barriers. If the class reference is not in the 509 // set then the result has not yet been computed. 510 mutable ReaderWriterMutex requires_constructor_barrier_lock_ DEFAULT_MUTEX_ACQUIRED_AFTER; 511 std::map<ClassReference, bool> requires_constructor_barrier_ 512 GUARDED_BY(requires_constructor_barrier_lock_); 513 514 typedef SafeMap<const ClassReference, CompiledClass*> ClassTable; 515 // All class references that this compiler has compiled. 516 mutable Mutex compiled_classes_lock_ DEFAULT_MUTEX_ACQUIRED_AFTER; 517 ClassTable compiled_classes_ GUARDED_BY(compiled_classes_lock_); 518 519 typedef AtomicMethodRefMap<CompiledMethod*> MethodTable; 520 521 private: 522 // All method references that this compiler has compiled. 523 MethodTable compiled_methods_; 524 525 // Number of non-relative patches in all compiled methods. These patches need space 526 // in the .oat_patches ELF section if requested in the compiler options. 527 Atomic<size_t> non_relative_linker_patch_count_; 528 529 // If image_ is true, specifies the classes that will be included in the image. 530 // Note if image_classes_ is null, all classes are included in the image. 531 std::unique_ptr<std::unordered_set<std::string>> image_classes_; 532 533 // Specifies the classes that will be compiled. Note that if classes_to_compile_ is null, 534 // all classes are eligible for compilation (duplication filters etc. will still apply). 535 // This option may be restricted to the boot image, depending on a flag in the implementation. 536 std::unique_ptr<std::unordered_set<std::string>> classes_to_compile_; 537 538 // Specifies the methods that will be compiled. Note that if methods_to_compile_ is null, 539 // all methods are eligible for compilation (compilation filters etc. will still apply). 540 // This option may be restricted to the boot image, depending on a flag in the implementation. 541 std::unique_ptr<std::unordered_set<std::string>> methods_to_compile_; 542 543 bool had_hard_verifier_failure_; 544 545 // A thread pool that can (potentially) run tasks in parallel. 546 std::unique_ptr<ThreadPool> parallel_thread_pool_; 547 size_t parallel_thread_count_; 548 549 // A thread pool that guarantees running single-threaded on the main thread. 550 std::unique_ptr<ThreadPool> single_thread_pool_; 551 552 class AOTCompilationStats; 553 std::unique_ptr<AOTCompilationStats> stats_; 554 555 bool dump_stats_; 556 const bool dump_passes_; 557 558 CumulativeLogger* const timings_logger_; 559 560 typedef void (*CompilerCallbackFn)(CompilerDriver& driver); 561 typedef MutexLock* (*CompilerMutexLockFn)(CompilerDriver& driver); 562 563 void* compiler_context_; 564 565 bool support_boot_image_fixup_; 566 567 // List of dex files that will be stored in the oat file. 568 const std::vector<const DexFile*>* dex_files_for_oat_file_; 569 570 CompiledMethodStorage compiled_method_storage_; 571 572 // Info for profile guided compilation. 573 const ProfileCompilationInfo* const profile_compilation_info_; 574 575 size_t max_arena_alloc_; 576 577 // Data for delaying dex-to-dex compilation. 578 Mutex dex_to_dex_references_lock_; 579 // In the first phase, dex_to_dex_references_ collects methods for dex-to-dex compilation. 580 class DexFileMethodSet; 581 std::vector<DexFileMethodSet> dex_to_dex_references_ GUARDED_BY(dex_to_dex_references_lock_); 582 // In the second phase, current_dex_to_dex_methods_ points to the BitVector with method 583 // indexes for dex-to-dex compilation in the current dex file. 584 const BitVector* current_dex_to_dex_methods_; 585 586 friend class CompileClassVisitor; 587 friend class DexToDexDecompilerTest; 588 friend class verifier::VerifierDepsTest; 589 DISALLOW_COPY_AND_ASSIGN(CompilerDriver); 590}; 591 592} // namespace art 593 594#endif // ART_COMPILER_DRIVER_COMPILER_DRIVER_H_ 595