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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_IA32_LITHIUM_CODEGEN_IA32_H_ | |
| 6 #define V8_IA32_LITHIUM_CODEGEN_IA32_H_ | |
| 7 | |
| 8 #include "src/ia32/lithium-ia32.h" | |
| 9 | |
| 10 #include "src/base/logging.h" | |
| 11 #include "src/deoptimizer.h" | |
| 12 #include "src/ia32/lithium-gap-resolver-ia32.h" | |
| 13 #include "src/lithium-codegen.h" | |
| 14 #include "src/safepoint-table.h" | |
| 15 #include "src/scopes.h" | |
| 16 #include "src/utils.h" | |
| 17 | |
| 18 namespace v8 { | |
| 19 namespace internal { | |
| 20 | |
| 21 // Forward declarations. | |
| 22 class LDeferredCode; | |
| 23 class LGapNode; | |
| 24 class SafepointGenerator; | |
| 25 | |
| 26 class LCodeGen: public LCodeGenBase { | |
| 27 public: | |
| 28 LCodeGen(LChunk* chunk, MacroAssembler* assembler, CompilationInfo* info) | |
| 29 : LCodeGenBase(chunk, assembler, info), | |
| 30 deoptimizations_(4, info->zone()), | |
| 31 jump_table_(4, info->zone()), | |
| 32 inlined_function_count_(0), | |
| 33 scope_(info->scope()), | |
| 34 translations_(info->zone()), | |
| 35 deferred_(8, info->zone()), | |
| 36 dynamic_frame_alignment_(false), | |
| 37 support_aligned_spilled_doubles_(false), | |
| 38 osr_pc_offset_(-1), | |
| 39 frame_is_built_(false), | |
| 40 safepoints_(info->zone()), | |
| 41 resolver_(this), | |
| 42 expected_safepoint_kind_(Safepoint::kSimple) { | |
| 43 PopulateDeoptimizationLiteralsWithInlinedFunctions(); | |
| 44 } | |
| 45 | |
| 46 int LookupDestination(int block_id) const { | |
| 47 return chunk()->LookupDestination(block_id); | |
| 48 } | |
| 49 | |
| 50 bool IsNextEmittedBlock(int block_id) const { | |
| 51 return LookupDestination(block_id) == GetNextEmittedBlock(); | |
| 52 } | |
| 53 | |
| 54 bool NeedsEagerFrame() const { | |
| 55 return GetStackSlotCount() > 0 || | |
| 56 info()->is_non_deferred_calling() || | |
| 57 !info()->IsStub() || | |
| 58 info()->requires_frame(); | |
| 59 } | |
| 60 bool NeedsDeferredFrame() const { | |
| 61 return !NeedsEagerFrame() && info()->is_deferred_calling(); | |
| 62 } | |
| 63 | |
| 64 // Support for converting LOperands to assembler types. | |
| 65 Operand ToOperand(LOperand* op) const; | |
| 66 Register ToRegister(LOperand* op) const; | |
| 67 XMMRegister ToDoubleRegister(LOperand* op) const; | |
| 68 | |
| 69 bool IsInteger32(LConstantOperand* op) const; | |
| 70 bool IsSmi(LConstantOperand* op) const; | |
| 71 Immediate ToImmediate(LOperand* op, const Representation& r) const { | |
| 72 return Immediate(ToRepresentation(LConstantOperand::cast(op), r)); | |
| 73 } | |
| 74 double ToDouble(LConstantOperand* op) const; | |
| 75 | |
| 76 Handle<Object> ToHandle(LConstantOperand* op) const; | |
| 77 | |
| 78 // The operand denoting the second word (the one with a higher address) of | |
| 79 // a double stack slot. | |
| 80 Operand HighOperand(LOperand* op); | |
| 81 | |
| 82 // Try to generate code for the entire chunk, but it may fail if the | |
| 83 // chunk contains constructs we cannot handle. Returns true if the | |
| 84 // code generation attempt succeeded. | |
| 85 bool GenerateCode(); | |
| 86 | |
| 87 // Finish the code by setting stack height, safepoint, and bailout | |
| 88 // information on it. | |
| 89 void FinishCode(Handle<Code> code); | |
| 90 | |
| 91 // Deferred code support. | |
| 92 void DoDeferredNumberTagD(LNumberTagD* instr); | |
| 93 | |
| 94 enum IntegerSignedness { SIGNED_INT32, UNSIGNED_INT32 }; | |
| 95 void DoDeferredNumberTagIU(LInstruction* instr, | |
| 96 LOperand* value, | |
| 97 LOperand* temp, | |
| 98 IntegerSignedness signedness); | |
| 99 | |
| 100 void DoDeferredTaggedToI(LTaggedToI* instr, Label* done); | |
| 101 void DoDeferredMathAbsTaggedHeapNumber(LMathAbs* instr); | |
| 102 void DoDeferredStackCheck(LStackCheck* instr); | |
| 103 void DoDeferredMaybeGrowElements(LMaybeGrowElements* instr); | |
| 104 void DoDeferredStringCharCodeAt(LStringCharCodeAt* instr); | |
| 105 void DoDeferredStringCharFromCode(LStringCharFromCode* instr); | |
| 106 void DoDeferredAllocate(LAllocate* instr); | |
| 107 void DoDeferredInstanceMigration(LCheckMaps* instr, Register object); | |
| 108 void DoDeferredLoadMutableDouble(LLoadFieldByIndex* instr, | |
| 109 Register object, | |
| 110 Register index); | |
| 111 | |
| 112 // Parallel move support. | |
| 113 void DoParallelMove(LParallelMove* move); | |
| 114 void DoGap(LGap* instr); | |
| 115 | |
| 116 // Emit frame translation commands for an environment. | |
| 117 void WriteTranslation(LEnvironment* environment, Translation* translation); | |
| 118 | |
| 119 void EnsureRelocSpaceForDeoptimization(); | |
| 120 | |
| 121 // Declare methods that deal with the individual node types. | |
| 122 #define DECLARE_DO(type) void Do##type(L##type* node); | |
| 123 LITHIUM_CONCRETE_INSTRUCTION_LIST(DECLARE_DO) | |
| 124 #undef DECLARE_DO | |
| 125 | |
| 126 private: | |
| 127 LanguageMode language_mode() const { return info()->language_mode(); } | |
| 128 | |
| 129 Scope* scope() const { return scope_; } | |
| 130 | |
| 131 XMMRegister double_scratch0() const { return xmm0; } | |
| 132 | |
| 133 void EmitClassOfTest(Label* if_true, | |
| 134 Label* if_false, | |
| 135 Handle<String> class_name, | |
| 136 Register input, | |
| 137 Register temporary, | |
| 138 Register temporary2); | |
| 139 | |
| 140 int GetStackSlotCount() const { return chunk()->spill_slot_count(); } | |
| 141 | |
| 142 void AddDeferredCode(LDeferredCode* code) { deferred_.Add(code, zone()); } | |
| 143 | |
| 144 void SaveCallerDoubles(); | |
| 145 void RestoreCallerDoubles(); | |
| 146 | |
| 147 // Code generation passes. Returns true if code generation should | |
| 148 // continue. | |
| 149 void GenerateBodyInstructionPre(LInstruction* instr) override; | |
| 150 void GenerateBodyInstructionPost(LInstruction* instr) override; | |
| 151 bool GeneratePrologue(); | |
| 152 bool GenerateDeferredCode(); | |
| 153 bool GenerateJumpTable(); | |
| 154 bool GenerateSafepointTable(); | |
| 155 | |
| 156 // Generates the custom OSR entrypoint and sets the osr_pc_offset. | |
| 157 void GenerateOsrPrologue(); | |
| 158 | |
| 159 enum SafepointMode { | |
| 160 RECORD_SIMPLE_SAFEPOINT, | |
| 161 RECORD_SAFEPOINT_WITH_REGISTERS_AND_NO_ARGUMENTS | |
| 162 }; | |
| 163 | |
| 164 void CallCode(Handle<Code> code, | |
| 165 RelocInfo::Mode mode, | |
| 166 LInstruction* instr); | |
| 167 | |
| 168 void CallCodeGeneric(Handle<Code> code, | |
| 169 RelocInfo::Mode mode, | |
| 170 LInstruction* instr, | |
| 171 SafepointMode safepoint_mode); | |
| 172 | |
| 173 void CallRuntime(const Runtime::Function* fun, | |
| 174 int argc, | |
| 175 LInstruction* instr, | |
| 176 SaveFPRegsMode save_doubles = kDontSaveFPRegs); | |
| 177 | |
| 178 void CallRuntime(Runtime::FunctionId id, | |
| 179 int argc, | |
| 180 LInstruction* instr) { | |
| 181 const Runtime::Function* function = Runtime::FunctionForId(id); | |
| 182 CallRuntime(function, argc, instr); | |
| 183 } | |
| 184 | |
| 185 void CallRuntimeFromDeferred(Runtime::FunctionId id, | |
| 186 int argc, | |
| 187 LInstruction* instr, | |
| 188 LOperand* context); | |
| 189 | |
| 190 void LoadContextFromDeferred(LOperand* context); | |
| 191 | |
| 192 // Generate a direct call to a known function. Expects the function | |
| 193 // to be in edi. | |
| 194 void CallKnownFunction(Handle<JSFunction> function, | |
| 195 int formal_parameter_count, int arity, | |
| 196 LInstruction* instr); | |
| 197 | |
| 198 void RecordSafepointWithLazyDeopt(LInstruction* instr, | |
| 199 SafepointMode safepoint_mode); | |
| 200 | |
| 201 void RegisterEnvironmentForDeoptimization(LEnvironment* environment, | |
| 202 Safepoint::DeoptMode mode); | |
| 203 void DeoptimizeIf(Condition cc, LInstruction* instr, | |
| 204 Deoptimizer::DeoptReason deopt_reason, | |
| 205 Deoptimizer::BailoutType bailout_type); | |
| 206 void DeoptimizeIf(Condition cc, LInstruction* instr, | |
| 207 Deoptimizer::DeoptReason deopt_reason); | |
| 208 | |
| 209 bool DeoptEveryNTimes() { | |
| 210 return FLAG_deopt_every_n_times != 0 && !info()->IsStub(); | |
| 211 } | |
| 212 | |
| 213 void AddToTranslation(LEnvironment* environment, | |
| 214 Translation* translation, | |
| 215 LOperand* op, | |
| 216 bool is_tagged, | |
| 217 bool is_uint32, | |
| 218 int* object_index_pointer, | |
| 219 int* dematerialized_index_pointer); | |
| 220 void PopulateDeoptimizationData(Handle<Code> code); | |
| 221 | |
| 222 void PopulateDeoptimizationLiteralsWithInlinedFunctions(); | |
| 223 | |
| 224 Register ToRegister(int index) const; | |
| 225 XMMRegister ToDoubleRegister(int index) const; | |
| 226 int32_t ToRepresentation(LConstantOperand* op, const Representation& r) const; | |
| 227 int32_t ToInteger32(LConstantOperand* op) const; | |
| 228 ExternalReference ToExternalReference(LConstantOperand* op) const; | |
| 229 | |
| 230 Operand BuildFastArrayOperand(LOperand* elements_pointer, | |
| 231 LOperand* key, | |
| 232 Representation key_representation, | |
| 233 ElementsKind elements_kind, | |
| 234 uint32_t base_offset); | |
| 235 | |
| 236 Operand BuildSeqStringOperand(Register string, | |
| 237 LOperand* index, | |
| 238 String::Encoding encoding); | |
| 239 | |
| 240 void EmitIntegerMathAbs(LMathAbs* instr); | |
| 241 | |
| 242 // Support for recording safepoint and position information. | |
| 243 void RecordSafepoint(LPointerMap* pointers, | |
| 244 Safepoint::Kind kind, | |
| 245 int arguments, | |
| 246 Safepoint::DeoptMode mode); | |
| 247 void RecordSafepoint(LPointerMap* pointers, Safepoint::DeoptMode mode); | |
| 248 void RecordSafepoint(Safepoint::DeoptMode mode); | |
| 249 void RecordSafepointWithRegisters(LPointerMap* pointers, | |
| 250 int arguments, | |
| 251 Safepoint::DeoptMode mode); | |
| 252 | |
| 253 void RecordAndWritePosition(int position) override; | |
| 254 | |
| 255 static Condition TokenToCondition(Token::Value op, bool is_unsigned); | |
| 256 void EmitGoto(int block); | |
| 257 | |
| 258 // EmitBranch expects to be the last instruction of a block. | |
| 259 template<class InstrType> | |
| 260 void EmitBranch(InstrType instr, Condition cc); | |
| 261 template <class InstrType> | |
| 262 void EmitTrueBranch(InstrType instr, Condition cc); | |
| 263 template <class InstrType> | |
| 264 void EmitFalseBranch(InstrType instr, Condition cc); | |
| 265 void EmitNumberUntagD(LNumberUntagD* instr, Register input, Register temp, | |
| 266 XMMRegister result, NumberUntagDMode mode); | |
| 267 | |
| 268 // Emits optimized code for typeof x == "y". Modifies 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 EmitTypeofIs(LTypeofIsAndBranch* instr, Register input); | |
| 272 | |
| 273 // Emits optimized code for %_IsString(x). Preserves input register. | |
| 274 // Returns the condition on which a final split to | |
| 275 // true and false label should be made, to optimize fallthrough. | |
| 276 Condition EmitIsString(Register input, | |
| 277 Register temp1, | |
| 278 Label* is_not_string, | |
| 279 SmiCheck check_needed); | |
| 280 | |
| 281 // Emits optimized code for %_IsConstructCall(). | |
| 282 // Caller should branch on equal condition. | |
| 283 void EmitIsConstructCall(Register temp); | |
| 284 | |
| 285 // Emits optimized code to deep-copy the contents of statically known | |
| 286 // object graphs (e.g. object literal boilerplate). | |
| 287 void EmitDeepCopy(Handle<JSObject> object, | |
| 288 Register result, | |
| 289 Register source, | |
| 290 int* offset, | |
| 291 AllocationSiteMode mode); | |
| 292 | |
| 293 void EnsureSpaceForLazyDeopt(int space_needed) override; | |
| 294 void DoLoadKeyedExternalArray(LLoadKeyed* instr); | |
| 295 void DoLoadKeyedFixedDoubleArray(LLoadKeyed* instr); | |
| 296 void DoLoadKeyedFixedArray(LLoadKeyed* instr); | |
| 297 void DoStoreKeyedExternalArray(LStoreKeyed* instr); | |
| 298 void DoStoreKeyedFixedDoubleArray(LStoreKeyed* instr); | |
| 299 void DoStoreKeyedFixedArray(LStoreKeyed* instr); | |
| 300 | |
| 301 template <class T> | |
| 302 void EmitVectorLoadICRegisters(T* instr); | |
| 303 template <class T> | |
| 304 void EmitVectorStoreICRegisters(T* instr); | |
| 305 | |
| 306 void EmitReturn(LReturn* instr, bool dynamic_frame_alignment); | |
| 307 | |
| 308 // Emits code for pushing either a tagged constant, a (non-double) | |
| 309 // register, or a stack slot operand. | |
| 310 void EmitPushTaggedOperand(LOperand* operand); | |
| 311 | |
| 312 friend class LGapResolver; | |
| 313 | |
| 314 #ifdef _MSC_VER | |
| 315 // On windows, you may not access the stack more than one page below | |
| 316 // the most recently mapped page. To make the allocated area randomly | |
| 317 // accessible, we write an arbitrary value to each page in range | |
| 318 // esp + offset - page_size .. esp in turn. | |
| 319 void MakeSureStackPagesMapped(int offset); | |
| 320 #endif | |
| 321 | |
| 322 ZoneList<LEnvironment*> deoptimizations_; | |
| 323 ZoneList<Deoptimizer::JumpTableEntry> jump_table_; | |
| 324 int inlined_function_count_; | |
| 325 Scope* const scope_; | |
| 326 TranslationBuffer translations_; | |
| 327 ZoneList<LDeferredCode*> deferred_; | |
| 328 bool dynamic_frame_alignment_; | |
| 329 bool support_aligned_spilled_doubles_; | |
| 330 int osr_pc_offset_; | |
| 331 bool frame_is_built_; | |
| 332 | |
| 333 // Builder that keeps track of safepoints in the code. The table | |
| 334 // itself is emitted at the end of the generated code. | |
| 335 SafepointTableBuilder safepoints_; | |
| 336 | |
| 337 // Compiler from a set of parallel moves to a sequential list of moves. | |
| 338 LGapResolver resolver_; | |
| 339 | |
| 340 Safepoint::Kind expected_safepoint_kind_; | |
| 341 | |
| 342 class PushSafepointRegistersScope final BASE_EMBEDDED { | |
| 343 public: | |
| 344 explicit PushSafepointRegistersScope(LCodeGen* codegen) | |
| 345 : codegen_(codegen) { | |
| 346 DCHECK(codegen_->expected_safepoint_kind_ == Safepoint::kSimple); | |
| 347 codegen_->masm_->PushSafepointRegisters(); | |
| 348 codegen_->expected_safepoint_kind_ = Safepoint::kWithRegisters; | |
| 349 DCHECK(codegen_->info()->is_calling()); | |
| 350 } | |
| 351 | |
| 352 ~PushSafepointRegistersScope() { | |
| 353 DCHECK(codegen_->expected_safepoint_kind_ == Safepoint::kWithRegisters); | |
| 354 codegen_->masm_->PopSafepointRegisters(); | |
| 355 codegen_->expected_safepoint_kind_ = Safepoint::kSimple; | |
| 356 } | |
| 357 | |
| 358 private: | |
| 359 LCodeGen* codegen_; | |
| 360 }; | |
| 361 | |
| 362 friend class LDeferredCode; | |
| 363 friend class LEnvironment; | |
| 364 friend class SafepointGenerator; | |
| 365 DISALLOW_COPY_AND_ASSIGN(LCodeGen); | |
| 366 }; | |
| 367 | |
| 368 | |
| 369 class LDeferredCode : public ZoneObject { | |
| 370 public: | |
| 371 explicit LDeferredCode(LCodeGen* codegen) | |
| 372 : codegen_(codegen), | |
| 373 external_exit_(NULL), | |
| 374 instruction_index_(codegen->current_instruction_) { | |
| 375 codegen->AddDeferredCode(this); | |
| 376 } | |
| 377 | |
| 378 virtual ~LDeferredCode() {} | |
| 379 virtual void Generate() = 0; | |
| 380 virtual LInstruction* instr() = 0; | |
| 381 | |
| 382 void SetExit(Label* exit) { external_exit_ = exit; } | |
| 383 Label* entry() { return &entry_; } | |
| 384 Label* exit() { return external_exit_ != NULL ? external_exit_ : &exit_; } | |
| 385 Label* done() { return codegen_->NeedsDeferredFrame() ? &done_ : exit(); } | |
| 386 int instruction_index() const { return instruction_index_; } | |
| 387 | |
| 388 protected: | |
| 389 LCodeGen* codegen() const { return codegen_; } | |
| 390 MacroAssembler* masm() const { return codegen_->masm(); } | |
| 391 | |
| 392 private: | |
| 393 LCodeGen* codegen_; | |
| 394 Label entry_; | |
| 395 Label exit_; | |
| 396 Label* external_exit_; | |
| 397 Label done_; | |
| 398 int instruction_index_; | |
| 399 }; | |
| 400 | |
| 401 } // namespace internal | |
| 402 } // namespace v8 | |
| 403 | |
| 404 #endif // V8_IA32_LITHIUM_CODEGEN_IA32_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