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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_ARM_LITHIUM_CODEGEN_ARM_H_ | |
| 6 #define V8_ARM_LITHIUM_CODEGEN_ARM_H_ | |
| 7 | |
| 8 #include "src/arm/lithium-arm.h" | |
| 9 | |
| 10 #include "src/arm/lithium-gap-resolver-arm.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 | |
| 17 namespace v8 { | |
| 18 namespace internal { | |
| 19 | |
| 20 // Forward declarations. | |
| 21 class LDeferredCode; | |
| 22 class SafepointGenerator; | |
| 23 | |
| 24 class LCodeGen: public LCodeGenBase { | |
| 25 public: | |
| 26 LCodeGen(LChunk* chunk, MacroAssembler* assembler, CompilationInfo* info) | |
| 27 : LCodeGenBase(chunk, assembler, info), | |
| 28 deoptimizations_(4, info->zone()), | |
| 29 jump_table_(4, info->zone()), | |
| 30 inlined_function_count_(0), | |
| 31 scope_(info->scope()), | |
| 32 translations_(info->zone()), | |
| 33 deferred_(8, info->zone()), | |
| 34 osr_pc_offset_(-1), | |
| 35 frame_is_built_(false), | |
| 36 safepoints_(info->zone()), | |
| 37 resolver_(this), | |
| 38 expected_safepoint_kind_(Safepoint::kSimple) { | |
| 39 PopulateDeoptimizationLiteralsWithInlinedFunctions(); | |
| 40 } | |
| 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 LinkRegisterStatus GetLinkRegisterState() const { | |
| 62 return frame_is_built_ ? kLRHasBeenSaved : kLRHasNotBeenSaved; | |
| 63 } | |
| 64 | |
| 65 // Support for converting LOperands to assembler types. | |
| 66 // LOperand must be a register. | |
| 67 Register ToRegister(LOperand* op) const; | |
| 68 | |
| 69 // LOperand is loaded into scratch, unless already a register. | |
| 70 Register EmitLoadRegister(LOperand* op, Register scratch); | |
| 71 | |
| 72 // LOperand must be a double register. | |
| 73 DwVfpRegister ToDoubleRegister(LOperand* op) const; | |
| 74 | |
| 75 // LOperand is loaded into dbl_scratch, unless already a double register. | |
| 76 DwVfpRegister EmitLoadDoubleRegister(LOperand* op, | |
| 77 SwVfpRegister flt_scratch, | |
| 78 DwVfpRegister dbl_scratch); | |
| 79 int32_t ToRepresentation(LConstantOperand* op, const Representation& r) const; | |
| 80 int32_t ToInteger32(LConstantOperand* op) const; | |
| 81 Smi* ToSmi(LConstantOperand* op) const; | |
| 82 double ToDouble(LConstantOperand* op) const; | |
| 83 Operand ToOperand(LOperand* op); | |
| 84 MemOperand ToMemOperand(LOperand* op) const; | |
| 85 // Returns a MemOperand pointing to the high word of a DoubleStackSlot. | |
| 86 MemOperand ToHighMemOperand(LOperand* op) const; | |
| 87 | |
| 88 bool IsInteger32(LConstantOperand* op) const; | |
| 89 bool IsSmi(LConstantOperand* op) const; | |
| 90 Handle<Object> ToHandle(LConstantOperand* op) const; | |
| 91 | |
| 92 // Try to generate code for the entire chunk, but it may fail if the | |
| 93 // chunk contains constructs we cannot handle. Returns true if the | |
| 94 // code generation attempt succeeded. | |
| 95 bool GenerateCode(); | |
| 96 | |
| 97 // Finish the code by setting stack height, safepoint, and bailout | |
| 98 // information on it. | |
| 99 void FinishCode(Handle<Code> code); | |
| 100 | |
| 101 // Deferred code support. | |
| 102 void DoDeferredNumberTagD(LNumberTagD* instr); | |
| 103 | |
| 104 enum IntegerSignedness { SIGNED_INT32, UNSIGNED_INT32 }; | |
| 105 void DoDeferredNumberTagIU(LInstruction* instr, | |
| 106 LOperand* value, | |
| 107 LOperand* temp1, | |
| 108 LOperand* temp2, | |
| 109 IntegerSignedness signedness); | |
| 110 | |
| 111 void DoDeferredTaggedToI(LTaggedToI* instr); | |
| 112 void DoDeferredMathAbsTaggedHeapNumber(LMathAbs* instr); | |
| 113 void DoDeferredStackCheck(LStackCheck* instr); | |
| 114 void DoDeferredMaybeGrowElements(LMaybeGrowElements* instr); | |
| 115 void DoDeferredStringCharCodeAt(LStringCharCodeAt* instr); | |
| 116 void DoDeferredStringCharFromCode(LStringCharFromCode* instr); | |
| 117 void DoDeferredAllocate(LAllocate* instr); | |
| 118 void DoDeferredInstanceMigration(LCheckMaps* instr, Register object); | |
| 119 void DoDeferredLoadMutableDouble(LLoadFieldByIndex* instr, | |
| 120 Register result, | |
| 121 Register object, | |
| 122 Register index); | |
| 123 | |
| 124 // Parallel move support. | |
| 125 void DoParallelMove(LParallelMove* move); | |
| 126 void DoGap(LGap* instr); | |
| 127 | |
| 128 MemOperand PrepareKeyedOperand(Register key, | |
| 129 Register base, | |
| 130 bool key_is_constant, | |
| 131 int constant_key, | |
| 132 int element_size, | |
| 133 int shift_size, | |
| 134 int base_offset); | |
| 135 | |
| 136 // Emit frame translation commands for an environment. | |
| 137 void WriteTranslation(LEnvironment* environment, Translation* translation); | |
| 138 | |
| 139 // Declare methods that deal with the individual node types. | |
| 140 #define DECLARE_DO(type) void Do##type(L##type* node); | |
| 141 LITHIUM_CONCRETE_INSTRUCTION_LIST(DECLARE_DO) | |
| 142 #undef DECLARE_DO | |
| 143 | |
| 144 private: | |
| 145 LanguageMode language_mode() const { return info()->language_mode(); } | |
| 146 | |
| 147 Scope* scope() const { return scope_; } | |
| 148 | |
| 149 Register scratch0() { return r9; } | |
| 150 LowDwVfpRegister double_scratch0() { return kScratchDoubleReg; } | |
| 151 | |
| 152 LInstruction* GetNextInstruction(); | |
| 153 | |
| 154 void EmitClassOfTest(Label* if_true, | |
| 155 Label* if_false, | |
| 156 Handle<String> class_name, | |
| 157 Register input, | |
| 158 Register temporary, | |
| 159 Register temporary2); | |
| 160 | |
| 161 int GetStackSlotCount() const { return chunk()->spill_slot_count(); } | |
| 162 | |
| 163 void AddDeferredCode(LDeferredCode* code) { deferred_.Add(code, zone()); } | |
| 164 | |
| 165 void SaveCallerDoubles(); | |
| 166 void RestoreCallerDoubles(); | |
| 167 | |
| 168 // Code generation passes. Returns true if code generation should | |
| 169 // continue. | |
| 170 void GenerateBodyInstructionPre(LInstruction* instr) override; | |
| 171 bool GeneratePrologue(); | |
| 172 bool GenerateDeferredCode(); | |
| 173 bool GenerateJumpTable(); | |
| 174 bool GenerateSafepointTable(); | |
| 175 | |
| 176 // Generates the custom OSR entrypoint and sets the osr_pc_offset. | |
| 177 void GenerateOsrPrologue(); | |
| 178 | |
| 179 enum SafepointMode { | |
| 180 RECORD_SIMPLE_SAFEPOINT, | |
| 181 RECORD_SAFEPOINT_WITH_REGISTERS_AND_NO_ARGUMENTS | |
| 182 }; | |
| 183 | |
| 184 int CallCodeSize(Handle<Code> code, RelocInfo::Mode mode); | |
| 185 | |
| 186 void CallCode( | |
| 187 Handle<Code> code, | |
| 188 RelocInfo::Mode mode, | |
| 189 LInstruction* instr, | |
| 190 TargetAddressStorageMode storage_mode = CAN_INLINE_TARGET_ADDRESS); | |
| 191 | |
| 192 void CallCodeGeneric( | |
| 193 Handle<Code> code, | |
| 194 RelocInfo::Mode mode, | |
| 195 LInstruction* instr, | |
| 196 SafepointMode safepoint_mode, | |
| 197 TargetAddressStorageMode storage_mode = CAN_INLINE_TARGET_ADDRESS); | |
| 198 | |
| 199 void CallRuntime(const Runtime::Function* function, | |
| 200 int num_arguments, | |
| 201 LInstruction* instr, | |
| 202 SaveFPRegsMode save_doubles = kDontSaveFPRegs); | |
| 203 | |
| 204 void CallRuntime(Runtime::FunctionId id, | |
| 205 int num_arguments, | |
| 206 LInstruction* instr) { | |
| 207 const Runtime::Function* function = Runtime::FunctionForId(id); | |
| 208 CallRuntime(function, num_arguments, instr); | |
| 209 } | |
| 210 | |
| 211 void LoadContextFromDeferred(LOperand* context); | |
| 212 void CallRuntimeFromDeferred(Runtime::FunctionId id, | |
| 213 int argc, | |
| 214 LInstruction* instr, | |
| 215 LOperand* context); | |
| 216 | |
| 217 // Generate a direct call to a known function. Expects the function | |
| 218 // to be in r1. | |
| 219 void CallKnownFunction(Handle<JSFunction> function, | |
| 220 int formal_parameter_count, int arity, | |
| 221 LInstruction* instr); | |
| 222 | |
| 223 void RecordSafepointWithLazyDeopt(LInstruction* instr, | |
| 224 SafepointMode safepoint_mode); | |
| 225 | |
| 226 void RegisterEnvironmentForDeoptimization(LEnvironment* environment, | |
| 227 Safepoint::DeoptMode mode); | |
| 228 void DeoptimizeIf(Condition condition, LInstruction* instr, | |
| 229 Deoptimizer::DeoptReason deopt_reason, | |
| 230 Deoptimizer::BailoutType bailout_type); | |
| 231 void DeoptimizeIf(Condition condition, LInstruction* instr, | |
| 232 Deoptimizer::DeoptReason deopt_reason); | |
| 233 | |
| 234 void AddToTranslation(LEnvironment* environment, | |
| 235 Translation* translation, | |
| 236 LOperand* op, | |
| 237 bool is_tagged, | |
| 238 bool is_uint32, | |
| 239 int* object_index_pointer, | |
| 240 int* dematerialized_index_pointer); | |
| 241 void PopulateDeoptimizationData(Handle<Code> code); | |
| 242 | |
| 243 void PopulateDeoptimizationLiteralsWithInlinedFunctions(); | |
| 244 | |
| 245 Register ToRegister(int index) const; | |
| 246 DwVfpRegister ToDoubleRegister(int index) const; | |
| 247 | |
| 248 MemOperand BuildSeqStringOperand(Register string, | |
| 249 LOperand* index, | |
| 250 String::Encoding encoding); | |
| 251 | |
| 252 void EmitIntegerMathAbs(LMathAbs* instr); | |
| 253 | |
| 254 // Support for recording safepoint and position information. | |
| 255 void RecordSafepoint(LPointerMap* pointers, | |
| 256 Safepoint::Kind kind, | |
| 257 int arguments, | |
| 258 Safepoint::DeoptMode mode); | |
| 259 void RecordSafepoint(LPointerMap* pointers, Safepoint::DeoptMode mode); | |
| 260 void RecordSafepoint(Safepoint::DeoptMode mode); | |
| 261 void RecordSafepointWithRegisters(LPointerMap* pointers, | |
| 262 int arguments, | |
| 263 Safepoint::DeoptMode mode); | |
| 264 | |
| 265 void RecordAndWritePosition(int position) override; | |
| 266 | |
| 267 static Condition TokenToCondition(Token::Value op, bool is_unsigned); | |
| 268 void EmitGoto(int block); | |
| 269 | |
| 270 // EmitBranch expects to be the last instruction of a block. | |
| 271 template<class InstrType> | |
| 272 void EmitBranch(InstrType instr, Condition condition); | |
| 273 template <class InstrType> | |
| 274 void EmitTrueBranch(InstrType instr, Condition condition); | |
| 275 template <class InstrType> | |
| 276 void EmitFalseBranch(InstrType instr, Condition condition); | |
| 277 void EmitNumberUntagD(LNumberUntagD* instr, Register input, | |
| 278 DwVfpRegister result, NumberUntagDMode mode); | |
| 279 | |
| 280 // Emits optimized code for typeof x == "y". Modifies input register. | |
| 281 // Returns the condition on which a final split to | |
| 282 // true and false label should be made, to optimize fallthrough. | |
| 283 Condition EmitTypeofIs(Label* true_label, | |
| 284 Label* false_label, | |
| 285 Register input, | |
| 286 Handle<String> type_name); | |
| 287 | |
| 288 // Emits optimized code for %_IsString(x). Preserves input register. | |
| 289 // Returns the condition on which a final split to | |
| 290 // true and false label should be made, to optimize fallthrough. | |
| 291 Condition EmitIsString(Register input, | |
| 292 Register temp1, | |
| 293 Label* is_not_string, | |
| 294 SmiCheck check_needed); | |
| 295 | |
| 296 // Emits optimized code for %_IsConstructCall(). | |
| 297 // Caller should branch on equal condition. | |
| 298 void EmitIsConstructCall(Register temp1, Register temp2); | |
| 299 | |
| 300 // Emits optimized code to deep-copy the contents of statically known | |
| 301 // object graphs (e.g. object literal boilerplate). | |
| 302 void EmitDeepCopy(Handle<JSObject> object, | |
| 303 Register result, | |
| 304 Register source, | |
| 305 int* offset, | |
| 306 AllocationSiteMode mode); | |
| 307 | |
| 308 void EnsureSpaceForLazyDeopt(int space_needed) override; | |
| 309 void DoLoadKeyedExternalArray(LLoadKeyed* instr); | |
| 310 void DoLoadKeyedFixedDoubleArray(LLoadKeyed* instr); | |
| 311 void DoLoadKeyedFixedArray(LLoadKeyed* instr); | |
| 312 void DoStoreKeyedExternalArray(LStoreKeyed* instr); | |
| 313 void DoStoreKeyedFixedDoubleArray(LStoreKeyed* instr); | |
| 314 void DoStoreKeyedFixedArray(LStoreKeyed* instr); | |
| 315 | |
| 316 template <class T> | |
| 317 void EmitVectorLoadICRegisters(T* instr); | |
| 318 template <class T> | |
| 319 void EmitVectorStoreICRegisters(T* instr); | |
| 320 | |
| 321 ZoneList<LEnvironment*> deoptimizations_; | |
| 322 ZoneList<Deoptimizer::JumpTableEntry> jump_table_; | |
| 323 int inlined_function_count_; | |
| 324 Scope* const scope_; | |
| 325 TranslationBuffer translations_; | |
| 326 ZoneList<LDeferredCode*> deferred_; | |
| 327 int osr_pc_offset_; | |
| 328 bool frame_is_built_; | |
| 329 | |
| 330 // Builder that keeps track of safepoints in the code. The table | |
| 331 // itself is emitted at the end of the generated code. | |
| 332 SafepointTableBuilder safepoints_; | |
| 333 | |
| 334 // Compiler from a set of parallel moves to a sequential list of moves. | |
| 335 LGapResolver resolver_; | |
| 336 | |
| 337 Safepoint::Kind expected_safepoint_kind_; | |
| 338 | |
| 339 class PushSafepointRegistersScope final BASE_EMBEDDED { | |
| 340 public: | |
| 341 explicit PushSafepointRegistersScope(LCodeGen* codegen) | |
| 342 : codegen_(codegen) { | |
| 343 DCHECK(codegen_->info()->is_calling()); | |
| 344 DCHECK(codegen_->expected_safepoint_kind_ == Safepoint::kSimple); | |
| 345 codegen_->expected_safepoint_kind_ = Safepoint::kWithRegisters; | |
| 346 codegen_->masm_->PushSafepointRegisters(); | |
| 347 } | |
| 348 | |
| 349 ~PushSafepointRegistersScope() { | |
| 350 DCHECK(codegen_->expected_safepoint_kind_ == Safepoint::kWithRegisters); | |
| 351 codegen_->masm_->PopSafepointRegisters(); | |
| 352 codegen_->expected_safepoint_kind_ = Safepoint::kSimple; | |
| 353 } | |
| 354 | |
| 355 private: | |
| 356 LCodeGen* codegen_; | |
| 357 }; | |
| 358 | |
| 359 friend class LDeferredCode; | |
| 360 friend class LEnvironment; | |
| 361 friend class SafepointGenerator; | |
| 362 DISALLOW_COPY_AND_ASSIGN(LCodeGen); | |
| 363 }; | |
| 364 | |
| 365 | |
| 366 class LDeferredCode : public ZoneObject { | |
| 367 public: | |
| 368 explicit LDeferredCode(LCodeGen* codegen) | |
| 369 : codegen_(codegen), | |
| 370 external_exit_(NULL), | |
| 371 instruction_index_(codegen->current_instruction_) { | |
| 372 codegen->AddDeferredCode(this); | |
| 373 } | |
| 374 | |
| 375 virtual ~LDeferredCode() {} | |
| 376 virtual void Generate() = 0; | |
| 377 virtual LInstruction* instr() = 0; | |
| 378 | |
| 379 void SetExit(Label* exit) { external_exit_ = exit; } | |
| 380 Label* entry() { return &entry_; } | |
| 381 Label* exit() { return external_exit_ != NULL ? external_exit_ : &exit_; } | |
| 382 int instruction_index() const { return instruction_index_; } | |
| 383 | |
| 384 protected: | |
| 385 LCodeGen* codegen() const { return codegen_; } | |
| 386 MacroAssembler* masm() const { return codegen_->masm(); } | |
| 387 | |
| 388 private: | |
| 389 LCodeGen* codegen_; | |
| 390 Label entry_; | |
| 391 Label exit_; | |
| 392 Label* external_exit_; | |
| 393 int instruction_index_; | |
| 394 }; | |
| 395 | |
| 396 } // namespace internal | |
| 397 } // namespace v8 | |
| 398 | |
| 399 #endif // V8_ARM_LITHIUM_CODEGEN_ARM_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