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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_MIPS_LITHIUM_CODEGEN_MIPS_H_ | |
| 6 #define V8_MIPS_LITHIUM_CODEGEN_MIPS_H_ | |
| 7 | |
| 8 #include "src/deoptimizer.h" | |
| 9 #include "src/lithium-codegen.h" | |
| 10 #include "src/mips/lithium-gap-resolver-mips.h" | |
| 11 #include "src/mips/lithium-mips.h" | |
| 12 #include "src/safepoint-table.h" | |
| 13 #include "src/scopes.h" | |
| 14 #include "src/utils.h" | |
| 15 | |
| 16 namespace v8 { | |
| 17 namespace internal { | |
| 18 | |
| 19 // Forward declarations. | |
| 20 class LDeferredCode; | |
| 21 class SafepointGenerator; | |
| 22 | |
| 23 class LCodeGen: public LCodeGenBase { | |
| 24 public: | |
| 25 LCodeGen(LChunk* chunk, MacroAssembler* assembler, CompilationInfo* info) | |
| 26 : LCodeGenBase(chunk, assembler, info), | |
| 27 deoptimizations_(4, info->zone()), | |
| 28 jump_table_(4, info->zone()), | |
| 29 inlined_function_count_(0), | |
| 30 scope_(info->scope()), | |
| 31 translations_(info->zone()), | |
| 32 deferred_(8, info->zone()), | |
| 33 osr_pc_offset_(-1), | |
| 34 frame_is_built_(false), | |
| 35 safepoints_(info->zone()), | |
| 36 resolver_(this), | |
| 37 expected_safepoint_kind_(Safepoint::kSimple) { | |
| 38 PopulateDeoptimizationLiteralsWithInlinedFunctions(); | |
| 39 } | |
| 40 | |
| 41 | |
| 42 int LookupDestination(int block_id) const { | |
| 43 return chunk()->LookupDestination(block_id); | |
| 44 } | |
| 45 | |
| 46 bool IsNextEmittedBlock(int block_id) const { | |
| 47 return LookupDestination(block_id) == GetNextEmittedBlock(); | |
| 48 } | |
| 49 | |
| 50 bool NeedsEagerFrame() const { | |
| 51 return GetStackSlotCount() > 0 || | |
| 52 info()->is_non_deferred_calling() || | |
| 53 !info()->IsStub() || | |
| 54 info()->requires_frame(); | |
| 55 } | |
| 56 bool NeedsDeferredFrame() const { | |
| 57 return !NeedsEagerFrame() && info()->is_deferred_calling(); | |
| 58 } | |
| 59 | |
| 60 RAStatus GetRAState() const { | |
| 61 return frame_is_built_ ? kRAHasBeenSaved : kRAHasNotBeenSaved; | |
| 62 } | |
| 63 | |
| 64 // Support for converting LOperands to assembler types. | |
| 65 // LOperand must be a register. | |
| 66 Register ToRegister(LOperand* op) const; | |
| 67 | |
| 68 // LOperand is loaded into scratch, unless already a register. | |
| 69 Register EmitLoadRegister(LOperand* op, Register scratch); | |
| 70 | |
| 71 // LOperand must be a double register. | |
| 72 DoubleRegister ToDoubleRegister(LOperand* op) const; | |
| 73 | |
| 74 // LOperand is loaded into dbl_scratch, unless already a double register. | |
| 75 DoubleRegister EmitLoadDoubleRegister(LOperand* op, | |
| 76 FloatRegister flt_scratch, | |
| 77 DoubleRegister dbl_scratch); | |
| 78 int32_t ToRepresentation(LConstantOperand* op, const Representation& r) const; | |
| 79 int32_t ToInteger32(LConstantOperand* op) const; | |
| 80 Smi* ToSmi(LConstantOperand* op) const; | |
| 81 double ToDouble(LConstantOperand* op) const; | |
| 82 Operand ToOperand(LOperand* op); | |
| 83 MemOperand ToMemOperand(LOperand* op) const; | |
| 84 // Returns a MemOperand pointing to the high word of a DoubleStackSlot. | |
| 85 MemOperand ToHighMemOperand(LOperand* op) const; | |
| 86 | |
| 87 bool IsInteger32(LConstantOperand* op) const; | |
| 88 bool IsSmi(LConstantOperand* op) const; | |
| 89 Handle<Object> ToHandle(LConstantOperand* op) const; | |
| 90 | |
| 91 // Try to generate code for the entire chunk, but it may fail if the | |
| 92 // chunk contains constructs we cannot handle. Returns true if the | |
| 93 // code generation attempt succeeded. | |
| 94 bool GenerateCode(); | |
| 95 | |
| 96 // Finish the code by setting stack height, safepoint, and bailout | |
| 97 // information on it. | |
| 98 void FinishCode(Handle<Code> code); | |
| 99 | |
| 100 void DoDeferredNumberTagD(LNumberTagD* instr); | |
| 101 | |
| 102 enum IntegerSignedness { SIGNED_INT32, UNSIGNED_INT32 }; | |
| 103 void DoDeferredNumberTagIU(LInstruction* instr, | |
| 104 LOperand* value, | |
| 105 LOperand* temp1, | |
| 106 LOperand* temp2, | |
| 107 IntegerSignedness signedness); | |
| 108 | |
| 109 void DoDeferredTaggedToI(LTaggedToI* instr); | |
| 110 void DoDeferredMathAbsTaggedHeapNumber(LMathAbs* instr); | |
| 111 void DoDeferredStackCheck(LStackCheck* instr); | |
| 112 void DoDeferredMaybeGrowElements(LMaybeGrowElements* instr); | |
| 113 void DoDeferredStringCharCodeAt(LStringCharCodeAt* instr); | |
| 114 void DoDeferredStringCharFromCode(LStringCharFromCode* instr); | |
| 115 void DoDeferredAllocate(LAllocate* instr); | |
| 116 void DoDeferredInstanceMigration(LCheckMaps* instr, Register object); | |
| 117 void DoDeferredLoadMutableDouble(LLoadFieldByIndex* instr, | |
| 118 Register result, | |
| 119 Register object, | |
| 120 Register index); | |
| 121 | |
| 122 // Parallel move support. | |
| 123 void DoParallelMove(LParallelMove* move); | |
| 124 void DoGap(LGap* instr); | |
| 125 | |
| 126 MemOperand PrepareKeyedOperand(Register key, | |
| 127 Register base, | |
| 128 bool key_is_constant, | |
| 129 int constant_key, | |
| 130 int element_size, | |
| 131 int shift_size, | |
| 132 int base_offset); | |
| 133 | |
| 134 // Emit frame translation commands for an environment. | |
| 135 void WriteTranslation(LEnvironment* environment, Translation* translation); | |
| 136 | |
| 137 // Declare methods that deal with the individual node types. | |
| 138 #define DECLARE_DO(type) void Do##type(L##type* node); | |
| 139 LITHIUM_CONCRETE_INSTRUCTION_LIST(DECLARE_DO) | |
| 140 #undef DECLARE_DO | |
| 141 | |
| 142 private: | |
| 143 LanguageMode language_mode() const { return info()->language_mode(); } | |
| 144 | |
| 145 Scope* scope() const { return scope_; } | |
| 146 | |
| 147 Register scratch0() { return kLithiumScratchReg; } | |
| 148 Register scratch1() { return kLithiumScratchReg2; } | |
| 149 DoubleRegister double_scratch0() { return kLithiumScratchDouble; } | |
| 150 | |
| 151 LInstruction* GetNextInstruction(); | |
| 152 | |
| 153 void EmitClassOfTest(Label* if_true, | |
| 154 Label* if_false, | |
| 155 Handle<String> class_name, | |
| 156 Register input, | |
| 157 Register temporary, | |
| 158 Register temporary2); | |
| 159 | |
| 160 int GetStackSlotCount() const { return chunk()->spill_slot_count(); } | |
| 161 | |
| 162 void AddDeferredCode(LDeferredCode* code) { deferred_.Add(code, zone()); } | |
| 163 | |
| 164 void SaveCallerDoubles(); | |
| 165 void RestoreCallerDoubles(); | |
| 166 | |
| 167 // Code generation passes. Returns true if code generation should | |
| 168 // continue. | |
| 169 void GenerateBodyInstructionPre(LInstruction* instr) override; | |
| 170 bool GeneratePrologue(); | |
| 171 bool GenerateDeferredCode(); | |
| 172 bool GenerateJumpTable(); | |
| 173 bool GenerateSafepointTable(); | |
| 174 | |
| 175 // Generates the custom OSR entrypoint and sets the osr_pc_offset. | |
| 176 void GenerateOsrPrologue(); | |
| 177 | |
| 178 enum SafepointMode { | |
| 179 RECORD_SIMPLE_SAFEPOINT, | |
| 180 RECORD_SAFEPOINT_WITH_REGISTERS_AND_NO_ARGUMENTS | |
| 181 }; | |
| 182 | |
| 183 void CallCode(Handle<Code> code, | |
| 184 RelocInfo::Mode mode, | |
| 185 LInstruction* instr); | |
| 186 | |
| 187 void CallCodeGeneric(Handle<Code> code, | |
| 188 RelocInfo::Mode mode, | |
| 189 LInstruction* instr, | |
| 190 SafepointMode safepoint_mode); | |
| 191 | |
| 192 void CallRuntime(const Runtime::Function* function, | |
| 193 int num_arguments, | |
| 194 LInstruction* instr, | |
| 195 SaveFPRegsMode save_doubles = kDontSaveFPRegs); | |
| 196 | |
| 197 void CallRuntime(Runtime::FunctionId id, | |
| 198 int num_arguments, | |
| 199 LInstruction* instr) { | |
| 200 const Runtime::Function* function = Runtime::FunctionForId(id); | |
| 201 CallRuntime(function, num_arguments, instr); | |
| 202 } | |
| 203 | |
| 204 void LoadContextFromDeferred(LOperand* context); | |
| 205 void CallRuntimeFromDeferred(Runtime::FunctionId id, | |
| 206 int argc, | |
| 207 LInstruction* instr, | |
| 208 LOperand* context); | |
| 209 | |
| 210 // Generate a direct call to a known function. Expects the function | |
| 211 // to be in a1. | |
| 212 void CallKnownFunction(Handle<JSFunction> function, | |
| 213 int formal_parameter_count, int arity, | |
| 214 LInstruction* instr); | |
| 215 | |
| 216 void RecordSafepointWithLazyDeopt(LInstruction* instr, | |
| 217 SafepointMode safepoint_mode); | |
| 218 | |
| 219 void RegisterEnvironmentForDeoptimization(LEnvironment* environment, | |
| 220 Safepoint::DeoptMode mode); | |
| 221 void DeoptimizeIf(Condition condition, LInstruction* instr, | |
| 222 Deoptimizer::DeoptReason deopt_reason, | |
| 223 Deoptimizer::BailoutType bailout_type, | |
| 224 Register src1 = zero_reg, | |
| 225 const Operand& src2 = Operand(zero_reg)); | |
| 226 void DeoptimizeIf( | |
| 227 Condition condition, LInstruction* instr, | |
| 228 Deoptimizer::DeoptReason deopt_reason = Deoptimizer::kNoReason, | |
| 229 Register src1 = zero_reg, const Operand& src2 = Operand(zero_reg)); | |
| 230 | |
| 231 void AddToTranslation(LEnvironment* environment, | |
| 232 Translation* translation, | |
| 233 LOperand* op, | |
| 234 bool is_tagged, | |
| 235 bool is_uint32, | |
| 236 int* object_index_pointer, | |
| 237 int* dematerialized_index_pointer); | |
| 238 void PopulateDeoptimizationData(Handle<Code> code); | |
| 239 | |
| 240 void PopulateDeoptimizationLiteralsWithInlinedFunctions(); | |
| 241 | |
| 242 Register ToRegister(int index) const; | |
| 243 DoubleRegister ToDoubleRegister(int index) const; | |
| 244 | |
| 245 MemOperand BuildSeqStringOperand(Register string, | |
| 246 LOperand* index, | |
| 247 String::Encoding encoding); | |
| 248 | |
| 249 void EmitIntegerMathAbs(LMathAbs* instr); | |
| 250 | |
| 251 // Support for recording safepoint and position information. | |
| 252 void RecordSafepoint(LPointerMap* pointers, | |
| 253 Safepoint::Kind kind, | |
| 254 int arguments, | |
| 255 Safepoint::DeoptMode mode); | |
| 256 void RecordSafepoint(LPointerMap* pointers, Safepoint::DeoptMode mode); | |
| 257 void RecordSafepoint(Safepoint::DeoptMode mode); | |
| 258 void RecordSafepointWithRegisters(LPointerMap* pointers, | |
| 259 int arguments, | |
| 260 Safepoint::DeoptMode mode); | |
| 261 | |
| 262 void RecordAndWritePosition(int position) override; | |
| 263 | |
| 264 static Condition TokenToCondition(Token::Value op, bool is_unsigned); | |
| 265 void EmitGoto(int block); | |
| 266 | |
| 267 // EmitBranch expects to be the last instruction of a block. | |
| 268 template<class InstrType> | |
| 269 void EmitBranch(InstrType instr, | |
| 270 Condition condition, | |
| 271 Register src1, | |
| 272 const Operand& src2); | |
| 273 template<class InstrType> | |
| 274 void EmitBranchF(InstrType instr, | |
| 275 Condition condition, | |
| 276 FPURegister src1, | |
| 277 FPURegister src2); | |
| 278 template <class InstrType> | |
| 279 void EmitTrueBranch(InstrType instr, Condition condition, Register src1, | |
| 280 const Operand& src2); | |
| 281 template <class InstrType> | |
| 282 void EmitFalseBranch(InstrType instr, Condition condition, Register src1, | |
| 283 const Operand& src2); | |
| 284 template<class InstrType> | |
| 285 void EmitFalseBranchF(InstrType instr, | |
| 286 Condition condition, | |
| 287 FPURegister src1, | |
| 288 FPURegister src2); | |
| 289 void EmitCmpI(LOperand* left, LOperand* right); | |
| 290 void EmitNumberUntagD(LNumberUntagD* instr, Register input, | |
| 291 DoubleRegister result, NumberUntagDMode mode); | |
| 292 | |
| 293 // Emits optimized code for typeof x == "y". Modifies input register. | |
| 294 // Returns the condition on which a final split to | |
| 295 // true and false label should be made, to optimize fallthrough. | |
| 296 // Returns two registers in cmp1 and cmp2 that can be used in the | |
| 297 // Branch instruction after EmitTypeofIs. | |
| 298 Condition EmitTypeofIs(Label* true_label, | |
| 299 Label* false_label, | |
| 300 Register input, | |
| 301 Handle<String> type_name, | |
| 302 Register* cmp1, | |
| 303 Operand* cmp2); | |
| 304 | |
| 305 // Emits optimized code for %_IsString(x). Preserves input register. | |
| 306 // Returns the condition on which a final split to | |
| 307 // true and false label should be made, to optimize fallthrough. | |
| 308 Condition EmitIsString(Register input, | |
| 309 Register temp1, | |
| 310 Label* is_not_string, | |
| 311 SmiCheck check_needed); | |
| 312 | |
| 313 // Emits optimized code for %_IsConstructCall(). | |
| 314 // Caller should branch on equal condition. | |
| 315 void EmitIsConstructCall(Register temp1, Register temp2); | |
| 316 | |
| 317 // Emits optimized code to deep-copy the contents of statically known | |
| 318 // object graphs (e.g. object literal boilerplate). | |
| 319 void EmitDeepCopy(Handle<JSObject> object, | |
| 320 Register result, | |
| 321 Register source, | |
| 322 int* offset, | |
| 323 AllocationSiteMode mode); | |
| 324 // Emit optimized code for integer division. | |
| 325 // Inputs are signed. | |
| 326 // All registers are clobbered. | |
| 327 // If 'remainder' is no_reg, it is not computed. | |
| 328 void EmitSignedIntegerDivisionByConstant(Register result, | |
| 329 Register dividend, | |
| 330 int32_t divisor, | |
| 331 Register remainder, | |
| 332 Register scratch, | |
| 333 LEnvironment* environment); | |
| 334 | |
| 335 | |
| 336 void EnsureSpaceForLazyDeopt(int space_needed) override; | |
| 337 void DoLoadKeyedExternalArray(LLoadKeyed* instr); | |
| 338 void DoLoadKeyedFixedDoubleArray(LLoadKeyed* instr); | |
| 339 void DoLoadKeyedFixedArray(LLoadKeyed* instr); | |
| 340 void DoStoreKeyedExternalArray(LStoreKeyed* instr); | |
| 341 void DoStoreKeyedFixedDoubleArray(LStoreKeyed* instr); | |
| 342 void DoStoreKeyedFixedArray(LStoreKeyed* instr); | |
| 343 | |
| 344 template <class T> | |
| 345 void EmitVectorLoadICRegisters(T* instr); | |
| 346 template <class T> | |
| 347 void EmitVectorStoreICRegisters(T* instr); | |
| 348 | |
| 349 ZoneList<LEnvironment*> deoptimizations_; | |
| 350 ZoneList<Deoptimizer::JumpTableEntry> jump_table_; | |
| 351 int inlined_function_count_; | |
| 352 Scope* const scope_; | |
| 353 TranslationBuffer translations_; | |
| 354 ZoneList<LDeferredCode*> deferred_; | |
| 355 int osr_pc_offset_; | |
| 356 bool frame_is_built_; | |
| 357 | |
| 358 // Builder that keeps track of safepoints in the code. The table | |
| 359 // itself is emitted at the end of the generated code. | |
| 360 SafepointTableBuilder safepoints_; | |
| 361 | |
| 362 // Compiler from a set of parallel moves to a sequential list of moves. | |
| 363 LGapResolver resolver_; | |
| 364 | |
| 365 Safepoint::Kind expected_safepoint_kind_; | |
| 366 | |
| 367 class PushSafepointRegistersScope final BASE_EMBEDDED { | |
| 368 public: | |
| 369 explicit PushSafepointRegistersScope(LCodeGen* codegen) | |
| 370 : codegen_(codegen) { | |
| 371 DCHECK(codegen_->info()->is_calling()); | |
| 372 DCHECK(codegen_->expected_safepoint_kind_ == Safepoint::kSimple); | |
| 373 codegen_->expected_safepoint_kind_ = Safepoint::kWithRegisters; | |
| 374 | |
| 375 StoreRegistersStateStub stub(codegen_->isolate()); | |
| 376 codegen_->masm_->push(ra); | |
| 377 codegen_->masm_->CallStub(&stub); | |
| 378 } | |
| 379 | |
| 380 ~PushSafepointRegistersScope() { | |
| 381 DCHECK(codegen_->expected_safepoint_kind_ == Safepoint::kWithRegisters); | |
| 382 RestoreRegistersStateStub stub(codegen_->isolate()); | |
| 383 codegen_->masm_->push(ra); | |
| 384 codegen_->masm_->CallStub(&stub); | |
| 385 codegen_->expected_safepoint_kind_ = Safepoint::kSimple; | |
| 386 } | |
| 387 | |
| 388 private: | |
| 389 LCodeGen* codegen_; | |
| 390 }; | |
| 391 | |
| 392 friend class LDeferredCode; | |
| 393 friend class LEnvironment; | |
| 394 friend class SafepointGenerator; | |
| 395 DISALLOW_COPY_AND_ASSIGN(LCodeGen); | |
| 396 }; | |
| 397 | |
| 398 | |
| 399 class LDeferredCode : public ZoneObject { | |
| 400 public: | |
| 401 explicit LDeferredCode(LCodeGen* codegen) | |
| 402 : codegen_(codegen), | |
| 403 external_exit_(NULL), | |
| 404 instruction_index_(codegen->current_instruction_) { | |
| 405 codegen->AddDeferredCode(this); | |
| 406 } | |
| 407 | |
| 408 virtual ~LDeferredCode() {} | |
| 409 virtual void Generate() = 0; | |
| 410 virtual LInstruction* instr() = 0; | |
| 411 | |
| 412 void SetExit(Label* exit) { external_exit_ = exit; } | |
| 413 Label* entry() { return &entry_; } | |
| 414 Label* exit() { return external_exit_ != NULL ? external_exit_ : &exit_; } | |
| 415 int instruction_index() const { return instruction_index_; } | |
| 416 | |
| 417 protected: | |
| 418 LCodeGen* codegen() const { return codegen_; } | |
| 419 MacroAssembler* masm() const { return codegen_->masm(); } | |
| 420 | |
| 421 private: | |
| 422 LCodeGen* codegen_; | |
| 423 Label entry_; | |
| 424 Label exit_; | |
| 425 Label* external_exit_; | |
| 426 int instruction_index_; | |
| 427 }; | |
| 428 | |
| 429 } // namespace internal | |
| 430 } // namespace v8 | |
| 431 | |
| 432 #endif // V8_MIPS_LITHIUM_CODEGEN_MIPS_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