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| 1 // Copyright 2012 the V8 project authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef V8_X64_LITHIUM_CODEGEN_X64_H_ | |
| 6 #define V8_X64_LITHIUM_CODEGEN_X64_H_ | |
| 7 | |
| 8 #include "src/x64/lithium-x64.h" | |
| 9 | |
| 10 #include "src/base/logging.h" | |
| 11 #include "src/deoptimizer.h" | |
| 12 #include "src/lithium-codegen.h" | |
| 13 #include "src/safepoint-table.h" | |
| 14 #include "src/scopes.h" | |
| 15 #include "src/utils.h" | |
| 16 #include "src/x64/lithium-gap-resolver-x64.h" | |
| 17 | |
| 18 namespace v8 { | |
| 19 namespace internal { | |
| 20 | |
| 21 // Forward declarations. | |
| 22 class LDeferredCode; | |
| 23 class SafepointGenerator; | |
| 24 | |
| 25 class LCodeGen: public LCodeGenBase { | |
| 26 public: | |
| 27 LCodeGen(LChunk* chunk, MacroAssembler* assembler, CompilationInfo* info) | |
| 28 : LCodeGenBase(chunk, assembler, info), | |
| 29 deoptimizations_(4, info->zone()), | |
| 30 jump_table_(4, info->zone()), | |
| 31 inlined_function_count_(0), | |
| 32 scope_(info->scope()), | |
| 33 translations_(info->zone()), | |
| 34 deferred_(8, info->zone()), | |
| 35 osr_pc_offset_(-1), | |
| 36 frame_is_built_(false), | |
| 37 safepoints_(info->zone()), | |
| 38 resolver_(this), | |
| 39 expected_safepoint_kind_(Safepoint::kSimple) { | |
| 40 PopulateDeoptimizationLiteralsWithInlinedFunctions(); | |
| 41 } | |
| 42 | |
| 43 int LookupDestination(int block_id) const { | |
| 44 return chunk()->LookupDestination(block_id); | |
| 45 } | |
| 46 | |
| 47 bool IsNextEmittedBlock(int block_id) const { | |
| 48 return LookupDestination(block_id) == GetNextEmittedBlock(); | |
| 49 } | |
| 50 | |
| 51 bool NeedsEagerFrame() const { | |
| 52 return GetStackSlotCount() > 0 || | |
| 53 info()->is_non_deferred_calling() || | |
| 54 !info()->IsStub() || | |
| 55 info()->requires_frame(); | |
| 56 } | |
| 57 bool NeedsDeferredFrame() const { | |
| 58 return !NeedsEagerFrame() && info()->is_deferred_calling(); | |
| 59 } | |
| 60 | |
| 61 // Support for converting LOperands to assembler types. | |
| 62 Register ToRegister(LOperand* op) const; | |
| 63 XMMRegister ToDoubleRegister(LOperand* op) const; | |
| 64 bool IsInteger32Constant(LConstantOperand* op) const; | |
| 65 bool IsExternalConstant(LConstantOperand* op) const; | |
| 66 bool IsDehoistedKeyConstant(LConstantOperand* op) const; | |
| 67 bool IsSmiConstant(LConstantOperand* op) const; | |
| 68 int32_t ToRepresentation(LConstantOperand* op, const Representation& r) const; | |
| 69 int32_t ToInteger32(LConstantOperand* op) const; | |
| 70 Smi* ToSmi(LConstantOperand* op) const; | |
| 71 double ToDouble(LConstantOperand* op) const; | |
| 72 ExternalReference ToExternalReference(LConstantOperand* op) const; | |
| 73 Handle<Object> ToHandle(LConstantOperand* op) const; | |
| 74 Operand ToOperand(LOperand* op) const; | |
| 75 | |
| 76 // Try to generate code for the entire chunk, but it may fail if the | |
| 77 // chunk contains constructs we cannot handle. Returns true if the | |
| 78 // code generation attempt succeeded. | |
| 79 bool GenerateCode(); | |
| 80 | |
| 81 // Finish the code by setting stack height, safepoint, and bailout | |
| 82 // information on it. | |
| 83 void FinishCode(Handle<Code> code); | |
| 84 | |
| 85 // Deferred code support. | |
| 86 void DoDeferredNumberTagD(LNumberTagD* instr); | |
| 87 | |
| 88 enum IntegerSignedness { SIGNED_INT32, UNSIGNED_INT32 }; | |
| 89 void DoDeferredNumberTagIU(LInstruction* instr, | |
| 90 LOperand* value, | |
| 91 LOperand* temp1, | |
| 92 LOperand* temp2, | |
| 93 IntegerSignedness signedness); | |
| 94 | |
| 95 void DoDeferredTaggedToI(LTaggedToI* instr, Label* done); | |
| 96 void DoDeferredMathAbsTaggedHeapNumber(LMathAbs* instr); | |
| 97 void DoDeferredStackCheck(LStackCheck* instr); | |
| 98 void DoDeferredMaybeGrowElements(LMaybeGrowElements* instr); | |
| 99 void DoDeferredStringCharCodeAt(LStringCharCodeAt* instr); | |
| 100 void DoDeferredStringCharFromCode(LStringCharFromCode* instr); | |
| 101 void DoDeferredAllocate(LAllocate* instr); | |
| 102 void DoDeferredInstanceMigration(LCheckMaps* instr, Register object); | |
| 103 void DoDeferredLoadMutableDouble(LLoadFieldByIndex* instr, | |
| 104 Register object, | |
| 105 Register index); | |
| 106 | |
| 107 // Parallel move support. | |
| 108 void DoParallelMove(LParallelMove* move); | |
| 109 void DoGap(LGap* instr); | |
| 110 | |
| 111 // Emit frame translation commands for an environment. | |
| 112 void WriteTranslation(LEnvironment* environment, Translation* translation); | |
| 113 | |
| 114 // Declare methods that deal with the individual node types. | |
| 115 #define DECLARE_DO(type) void Do##type(L##type* node); | |
| 116 LITHIUM_CONCRETE_INSTRUCTION_LIST(DECLARE_DO) | |
| 117 #undef DECLARE_DO | |
| 118 | |
| 119 private: | |
| 120 LanguageMode language_mode() const { return info()->language_mode(); } | |
| 121 | |
| 122 LPlatformChunk* chunk() const { return chunk_; } | |
| 123 Scope* scope() const { return scope_; } | |
| 124 HGraph* graph() const { return chunk()->graph(); } | |
| 125 | |
| 126 XMMRegister double_scratch0() const { return xmm0; } | |
| 127 | |
| 128 void EmitClassOfTest(Label* if_true, | |
| 129 Label* if_false, | |
| 130 Handle<String> class_name, | |
| 131 Register input, | |
| 132 Register temporary, | |
| 133 Register scratch); | |
| 134 | |
| 135 int GetStackSlotCount() const { return chunk()->spill_slot_count(); } | |
| 136 | |
| 137 void AddDeferredCode(LDeferredCode* code) { deferred_.Add(code, zone()); } | |
| 138 | |
| 139 | |
| 140 void SaveCallerDoubles(); | |
| 141 void RestoreCallerDoubles(); | |
| 142 | |
| 143 // Code generation passes. Returns true if code generation should | |
| 144 // continue. | |
| 145 void GenerateBodyInstructionPre(LInstruction* instr) override; | |
| 146 void GenerateBodyInstructionPost(LInstruction* instr) override; | |
| 147 bool GeneratePrologue(); | |
| 148 bool GenerateDeferredCode(); | |
| 149 bool GenerateJumpTable(); | |
| 150 bool GenerateSafepointTable(); | |
| 151 | |
| 152 // Generates the custom OSR entrypoint and sets the osr_pc_offset. | |
| 153 void GenerateOsrPrologue(); | |
| 154 | |
| 155 enum SafepointMode { | |
| 156 RECORD_SIMPLE_SAFEPOINT, | |
| 157 RECORD_SAFEPOINT_WITH_REGISTERS | |
| 158 }; | |
| 159 | |
| 160 void CallCodeGeneric(Handle<Code> code, | |
| 161 RelocInfo::Mode mode, | |
| 162 LInstruction* instr, | |
| 163 SafepointMode safepoint_mode, | |
| 164 int argc); | |
| 165 | |
| 166 | |
| 167 void CallCode(Handle<Code> code, | |
| 168 RelocInfo::Mode mode, | |
| 169 LInstruction* instr); | |
| 170 | |
| 171 void CallRuntime(const Runtime::Function* function, | |
| 172 int num_arguments, | |
| 173 LInstruction* instr, | |
| 174 SaveFPRegsMode save_doubles = kDontSaveFPRegs); | |
| 175 | |
| 176 void CallRuntime(Runtime::FunctionId id, | |
| 177 int num_arguments, | |
| 178 LInstruction* instr) { | |
| 179 const Runtime::Function* function = Runtime::FunctionForId(id); | |
| 180 CallRuntime(function, num_arguments, instr); | |
| 181 } | |
| 182 | |
| 183 void CallRuntimeFromDeferred(Runtime::FunctionId id, | |
| 184 int argc, | |
| 185 LInstruction* instr, | |
| 186 LOperand* context); | |
| 187 | |
| 188 void LoadContextFromDeferred(LOperand* context); | |
| 189 | |
| 190 // Generate a direct call to a known function. Expects the function | |
| 191 // to be in rdi. | |
| 192 void CallKnownFunction(Handle<JSFunction> function, | |
| 193 int formal_parameter_count, int arity, | |
| 194 LInstruction* instr); | |
| 195 | |
| 196 void RecordSafepointWithLazyDeopt(LInstruction* instr, | |
| 197 SafepointMode safepoint_mode, | |
| 198 int argc); | |
| 199 void RegisterEnvironmentForDeoptimization(LEnvironment* environment, | |
| 200 Safepoint::DeoptMode mode); | |
| 201 void DeoptimizeIf(Condition cc, LInstruction* instr, | |
| 202 Deoptimizer::DeoptReason deopt_reason, | |
| 203 Deoptimizer::BailoutType bailout_type); | |
| 204 void DeoptimizeIf(Condition cc, LInstruction* instr, | |
| 205 Deoptimizer::DeoptReason deopt_reason); | |
| 206 | |
| 207 bool DeoptEveryNTimes() { | |
| 208 return FLAG_deopt_every_n_times != 0 && !info()->IsStub(); | |
| 209 } | |
| 210 | |
| 211 void AddToTranslation(LEnvironment* environment, | |
| 212 Translation* translation, | |
| 213 LOperand* op, | |
| 214 bool is_tagged, | |
| 215 bool is_uint32, | |
| 216 int* object_index_pointer, | |
| 217 int* dematerialized_index_pointer); | |
| 218 void PopulateDeoptimizationData(Handle<Code> code); | |
| 219 | |
| 220 void PopulateDeoptimizationLiteralsWithInlinedFunctions(); | |
| 221 | |
| 222 Register ToRegister(int index) const; | |
| 223 XMMRegister ToDoubleRegister(int index) const; | |
| 224 Operand BuildFastArrayOperand( | |
| 225 LOperand* elements_pointer, | |
| 226 LOperand* key, | |
| 227 Representation key_representation, | |
| 228 ElementsKind elements_kind, | |
| 229 uint32_t base_offset); | |
| 230 | |
| 231 Operand BuildSeqStringOperand(Register string, | |
| 232 LOperand* index, | |
| 233 String::Encoding encoding); | |
| 234 | |
| 235 void EmitIntegerMathAbs(LMathAbs* instr); | |
| 236 void EmitSmiMathAbs(LMathAbs* instr); | |
| 237 | |
| 238 // Support for recording safepoint and position information. | |
| 239 void RecordSafepoint(LPointerMap* pointers, | |
| 240 Safepoint::Kind kind, | |
| 241 int arguments, | |
| 242 Safepoint::DeoptMode mode); | |
| 243 void RecordSafepoint(LPointerMap* pointers, Safepoint::DeoptMode mode); | |
| 244 void RecordSafepoint(Safepoint::DeoptMode mode); | |
| 245 void RecordSafepointWithRegisters(LPointerMap* pointers, | |
| 246 int arguments, | |
| 247 Safepoint::DeoptMode mode); | |
| 248 void RecordAndWritePosition(int position) override; | |
| 249 | |
| 250 static Condition TokenToCondition(Token::Value op, bool is_unsigned); | |
| 251 void EmitGoto(int block); | |
| 252 | |
| 253 // EmitBranch expects to be the last instruction of a block. | |
| 254 template<class InstrType> | |
| 255 void EmitBranch(InstrType instr, Condition cc); | |
| 256 template <class InstrType> | |
| 257 void EmitTrueBranch(InstrType instr, Condition cc); | |
| 258 template <class InstrType> | |
| 259 void EmitFalseBranch(InstrType instr, Condition cc); | |
| 260 void EmitNumberUntagD(LNumberUntagD* instr, Register input, | |
| 261 XMMRegister result, NumberUntagDMode mode); | |
| 262 | |
| 263 // Emits optimized code for typeof x == "y". Modifies input register. | |
| 264 // Returns the condition on which a final split to | |
| 265 // true and false label should be made, to optimize fallthrough. | |
| 266 Condition EmitTypeofIs(LTypeofIsAndBranch* instr, Register input); | |
| 267 | |
| 268 // Emits optimized code for %_IsString(x). Preserves input register. | |
| 269 // Returns the condition on which a final split to | |
| 270 // true and false label should be made, to optimize fallthrough. | |
| 271 Condition EmitIsString(Register input, | |
| 272 Register temp1, | |
| 273 Label* is_not_string, | |
| 274 SmiCheck check_needed); | |
| 275 | |
| 276 // Emits optimized code for %_IsConstructCall(). | |
| 277 // Caller should branch on equal condition. | |
| 278 void EmitIsConstructCall(Register temp); | |
| 279 | |
| 280 // Emits code for pushing either a tagged constant, a (non-double) | |
| 281 // register, or a stack slot operand. | |
| 282 void EmitPushTaggedOperand(LOperand* operand); | |
| 283 | |
| 284 // Emits optimized code to deep-copy the contents of statically known | |
| 285 // object graphs (e.g. object literal boilerplate). | |
| 286 void EmitDeepCopy(Handle<JSObject> object, | |
| 287 Register result, | |
| 288 Register source, | |
| 289 int* offset, | |
| 290 AllocationSiteMode mode); | |
| 291 | |
| 292 void EnsureSpaceForLazyDeopt(int space_needed) override; | |
| 293 void DoLoadKeyedExternalArray(LLoadKeyed* instr); | |
| 294 void DoLoadKeyedFixedDoubleArray(LLoadKeyed* instr); | |
| 295 void DoLoadKeyedFixedArray(LLoadKeyed* instr); | |
| 296 void DoStoreKeyedExternalArray(LStoreKeyed* instr); | |
| 297 void DoStoreKeyedFixedDoubleArray(LStoreKeyed* instr); | |
| 298 void DoStoreKeyedFixedArray(LStoreKeyed* instr); | |
| 299 | |
| 300 template <class T> | |
| 301 void EmitVectorLoadICRegisters(T* instr); | |
| 302 template <class T> | |
| 303 void EmitVectorStoreICRegisters(T* instr); | |
| 304 | |
| 305 #ifdef _MSC_VER | |
| 306 // On windows, you may not access the stack more than one page below | |
| 307 // the most recently mapped page. To make the allocated area randomly | |
| 308 // accessible, we write an arbitrary value to each page in range | |
| 309 // rsp + offset - page_size .. rsp in turn. | |
| 310 void MakeSureStackPagesMapped(int offset); | |
| 311 #endif | |
| 312 | |
| 313 ZoneList<LEnvironment*> deoptimizations_; | |
| 314 ZoneList<Deoptimizer::JumpTableEntry> jump_table_; | |
| 315 int inlined_function_count_; | |
| 316 Scope* const scope_; | |
| 317 TranslationBuffer translations_; | |
| 318 ZoneList<LDeferredCode*> deferred_; | |
| 319 int osr_pc_offset_; | |
| 320 bool frame_is_built_; | |
| 321 | |
| 322 // Builder that keeps track of safepoints in the code. The table | |
| 323 // itself is emitted at the end of the generated code. | |
| 324 SafepointTableBuilder safepoints_; | |
| 325 | |
| 326 // Compiler from a set of parallel moves to a sequential list of moves. | |
| 327 LGapResolver resolver_; | |
| 328 | |
| 329 Safepoint::Kind expected_safepoint_kind_; | |
| 330 | |
| 331 class PushSafepointRegistersScope final BASE_EMBEDDED { | |
| 332 public: | |
| 333 explicit PushSafepointRegistersScope(LCodeGen* codegen) | |
| 334 : codegen_(codegen) { | |
| 335 DCHECK(codegen_->info()->is_calling()); | |
| 336 DCHECK(codegen_->expected_safepoint_kind_ == Safepoint::kSimple); | |
| 337 codegen_->masm_->PushSafepointRegisters(); | |
| 338 codegen_->expected_safepoint_kind_ = Safepoint::kWithRegisters; | |
| 339 } | |
| 340 | |
| 341 ~PushSafepointRegistersScope() { | |
| 342 DCHECK(codegen_->expected_safepoint_kind_ == Safepoint::kWithRegisters); | |
| 343 codegen_->masm_->PopSafepointRegisters(); | |
| 344 codegen_->expected_safepoint_kind_ = Safepoint::kSimple; | |
| 345 } | |
| 346 | |
| 347 private: | |
| 348 LCodeGen* codegen_; | |
| 349 }; | |
| 350 | |
| 351 friend class LDeferredCode; | |
| 352 friend class LEnvironment; | |
| 353 friend class SafepointGenerator; | |
| 354 DISALLOW_COPY_AND_ASSIGN(LCodeGen); | |
| 355 }; | |
| 356 | |
| 357 | |
| 358 class LDeferredCode: public ZoneObject { | |
| 359 public: | |
| 360 explicit LDeferredCode(LCodeGen* codegen) | |
| 361 : codegen_(codegen), | |
| 362 external_exit_(NULL), | |
| 363 instruction_index_(codegen->current_instruction_) { | |
| 364 codegen->AddDeferredCode(this); | |
| 365 } | |
| 366 | |
| 367 virtual ~LDeferredCode() {} | |
| 368 virtual void Generate() = 0; | |
| 369 virtual LInstruction* instr() = 0; | |
| 370 | |
| 371 void SetExit(Label* exit) { external_exit_ = exit; } | |
| 372 Label* entry() { return &entry_; } | |
| 373 Label* exit() { return external_exit_ != NULL ? external_exit_ : &exit_; } | |
| 374 Label* done() { return codegen_->NeedsDeferredFrame() ? &done_ : exit(); } | |
| 375 int instruction_index() const { return instruction_index_; } | |
| 376 | |
| 377 protected: | |
| 378 LCodeGen* codegen() const { return codegen_; } | |
| 379 MacroAssembler* masm() const { return codegen_->masm(); } | |
| 380 | |
| 381 private: | |
| 382 LCodeGen* codegen_; | |
| 383 Label entry_; | |
| 384 Label exit_; | |
| 385 Label done_; | |
| 386 Label* external_exit_; | |
| 387 int instruction_index_; | |
| 388 }; | |
| 389 | |
| 390 } // namespace internal | |
| 391 } // namespace v8 | |
| 392 | |
| 393 #endif // V8_X64_LITHIUM_CODEGEN_X64_H_ | |
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Chromium Code Reviews
Issue 1405363003:
Move Hydrogen and Lithium to src/crankshaft/ (Closed)
Base URL: https://chromium.googlesource.com/v8/v8.git@master