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.
5 #ifndef V8_MIPS_LITHIUM_CODEGEN_MIPS_H_
6 #define V8_MIPS_LITHIUM_CODEGEN_MIPS_H_
8 #include "src/deoptimizer.h"
9 #include "src/lithium-codegen.h"
10 #include "src/mips64/lithium-gap-resolver-mips64.h"
11 #include "src/mips64/lithium-mips64.h"
12 #include "src/safepoint-table.h"
13 #include "src/scopes.h"
14 #include "src/utils.h"
19 // Forward declarations.
21 class SafepointGenerator;
23 class LCodeGen: public LCodeGenBase {
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 deoptimization_literals_(8, info->zone()),
30 inlined_function_count_(0),
31 scope_(info->scope()),
32 translations_(info->zone()),
33 deferred_(8, info->zone()),
35 frame_is_built_(false),
36 safepoints_(info->zone()),
38 expected_safepoint_kind_(Safepoint::kSimple) {
39 PopulateDeoptimizationLiteralsWithInlinedFunctions();
43 int LookupDestination(int block_id) const {
44 return chunk()->LookupDestination(block_id);
47 bool IsNextEmittedBlock(int block_id) const {
48 return LookupDestination(block_id) == GetNextEmittedBlock();
51 bool NeedsEagerFrame() const {
52 return GetStackSlotCount() > 0 ||
53 info()->is_non_deferred_calling() ||
55 info()->requires_frame();
57 bool NeedsDeferredFrame() const {
58 return !NeedsEagerFrame() && info()->is_deferred_calling();
61 RAStatus GetRAState() const {
62 return frame_is_built_ ? kRAHasBeenSaved : kRAHasNotBeenSaved;
65 // Support for converting LOperands to assembler types.
66 // LOperand must be a register.
67 Register ToRegister(LOperand* op) const;
69 // LOperand is loaded into scratch, unless already a register.
70 Register EmitLoadRegister(LOperand* op, Register scratch);
72 // LOperand must be a double register.
73 DoubleRegister ToDoubleRegister(LOperand* op) const;
75 // LOperand is loaded into dbl_scratch, unless already a double register.
76 DoubleRegister EmitLoadDoubleRegister(LOperand* op,
77 FloatRegister flt_scratch,
78 DoubleRegister dbl_scratch);
79 int32_t ToRepresentation_donotuse(LConstantOperand* op,
80 const Representation& r) const;
81 int32_t ToInteger32(LConstantOperand* op) const;
82 Smi* ToSmi(LConstantOperand* op) const;
83 double ToDouble(LConstantOperand* op) const;
84 Operand ToOperand(LOperand* op);
85 MemOperand ToMemOperand(LOperand* op) const;
86 // Returns a MemOperand pointing to the high word of a DoubleStackSlot.
87 MemOperand ToHighMemOperand(LOperand* op) const;
89 bool IsInteger32(LConstantOperand* op) const;
90 bool IsSmi(LConstantOperand* op) const;
91 Handle<Object> ToHandle(LConstantOperand* op) const;
93 // Try to generate code for the entire chunk, but it may fail if the
94 // chunk contains constructs we cannot handle. Returns true if the
95 // code generation attempt succeeded.
98 // Finish the code by setting stack height, safepoint, and bailout
100 void FinishCode(Handle<Code> code);
102 void DoDeferredNumberTagD(LNumberTagD* instr);
104 enum IntegerSignedness { SIGNED_INT32, UNSIGNED_INT32 };
105 void DoDeferredNumberTagIU(LInstruction* instr,
109 IntegerSignedness signedness);
111 void DoDeferredTaggedToI(LTaggedToI* instr);
112 void DoDeferredMathAbsTaggedHeapNumber(LMathAbs* instr);
113 void DoDeferredStackCheck(LStackCheck* instr);
114 void DoDeferredStringCharCodeAt(LStringCharCodeAt* instr);
115 void DoDeferredStringCharFromCode(LStringCharFromCode* instr);
116 void DoDeferredAllocate(LAllocate* instr);
117 void DoDeferredInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr,
120 void DoDeferredInstanceMigration(LCheckMaps* instr, Register object);
121 void DoDeferredLoadMutableDouble(LLoadFieldByIndex* instr,
126 // Parallel move support.
127 void DoParallelMove(LParallelMove* move);
128 void DoGap(LGap* instr);
130 MemOperand PrepareKeyedOperand(Register key,
132 bool key_is_constant,
138 // Emit frame translation commands for an environment.
139 void WriteTranslation(LEnvironment* environment, Translation* translation);
141 // Declare methods that deal with the individual node types.
142 #define DECLARE_DO(type) void Do##type(L##type* node);
143 LITHIUM_CONCRETE_INSTRUCTION_LIST(DECLARE_DO)
147 StrictMode strict_mode() const { return info()->strict_mode(); }
149 Scope* scope() const { return scope_; }
151 Register scratch0() { return kLithiumScratchReg; }
152 Register scratch1() { return kLithiumScratchReg2; }
153 DoubleRegister double_scratch0() { return kLithiumScratchDouble; }
155 LInstruction* GetNextInstruction();
157 void EmitClassOfTest(Label* if_true,
159 Handle<String> class_name,
162 Register temporary2);
164 int GetStackSlotCount() const { return chunk()->spill_slot_count(); }
166 void AddDeferredCode(LDeferredCode* code) { deferred_.Add(code, zone()); }
168 void SaveCallerDoubles();
169 void RestoreCallerDoubles();
171 // Code generation passes. Returns true if code generation should
173 void GenerateBodyInstructionPre(LInstruction* instr) OVERRIDE;
174 bool GeneratePrologue();
175 bool GenerateDeferredCode();
176 bool GenerateJumpTable();
177 bool GenerateSafepointTable();
179 // Generates the custom OSR entrypoint and sets the osr_pc_offset.
180 void GenerateOsrPrologue();
183 RECORD_SIMPLE_SAFEPOINT,
184 RECORD_SAFEPOINT_WITH_REGISTERS_AND_NO_ARGUMENTS
187 void CallCode(Handle<Code> code,
188 RelocInfo::Mode mode,
189 LInstruction* instr);
191 void CallCodeGeneric(Handle<Code> code,
192 RelocInfo::Mode mode,
194 SafepointMode safepoint_mode);
196 void CallRuntime(const Runtime::Function* function,
199 SaveFPRegsMode save_doubles = kDontSaveFPRegs);
201 void CallRuntime(Runtime::FunctionId id,
203 LInstruction* instr) {
204 const Runtime::Function* function = Runtime::FunctionForId(id);
205 CallRuntime(function, num_arguments, instr);
208 void LoadContextFromDeferred(LOperand* context);
209 void CallRuntimeFromDeferred(Runtime::FunctionId id,
219 // Generate a direct call to a known function. Expects the function
221 void CallKnownFunction(Handle<JSFunction> function,
222 int formal_parameter_count,
227 void RecordSafepointWithLazyDeopt(LInstruction* instr,
228 SafepointMode safepoint_mode);
230 void RegisterEnvironmentForDeoptimization(LEnvironment* environment,
231 Safepoint::DeoptMode mode);
232 void DeoptimizeIf(Condition condition, LInstruction* instr,
233 Deoptimizer::BailoutType bailout_type, const char* detail,
234 Register src1 = zero_reg,
235 const Operand& src2 = Operand(zero_reg));
236 void DeoptimizeIf(Condition condition, LInstruction* instr,
237 const char* detail, Register src1 = zero_reg,
238 const Operand& src2 = Operand(zero_reg));
240 void AddToTranslation(LEnvironment* environment,
241 Translation* translation,
245 int* object_index_pointer,
246 int* dematerialized_index_pointer);
247 void PopulateDeoptimizationData(Handle<Code> code);
248 int DefineDeoptimizationLiteral(Handle<Object> literal);
250 void PopulateDeoptimizationLiteralsWithInlinedFunctions();
252 Register ToRegister(int index) const;
253 DoubleRegister ToDoubleRegister(int index) const;
255 MemOperand BuildSeqStringOperand(Register string,
257 String::Encoding encoding);
259 void EmitIntegerMathAbs(LMathAbs* instr);
261 // Support for recording safepoint and position information.
262 void RecordSafepoint(LPointerMap* pointers,
263 Safepoint::Kind kind,
265 Safepoint::DeoptMode mode);
266 void RecordSafepoint(LPointerMap* pointers, Safepoint::DeoptMode mode);
267 void RecordSafepoint(Safepoint::DeoptMode mode);
268 void RecordSafepointWithRegisters(LPointerMap* pointers,
270 Safepoint::DeoptMode mode);
272 void RecordAndWritePosition(int position) OVERRIDE;
274 static Condition TokenToCondition(Token::Value op, bool is_unsigned);
275 void EmitGoto(int block);
277 // EmitBranch expects to be the last instruction of a block.
278 template<class InstrType>
279 void EmitBranch(InstrType instr,
282 const Operand& src2);
283 template<class InstrType>
284 void EmitBranchF(InstrType instr,
288 template<class InstrType>
289 void EmitFalseBranch(InstrType instr,
292 const Operand& src2);
293 template<class InstrType>
294 void EmitFalseBranchF(InstrType instr,
298 void EmitCmpI(LOperand* left, LOperand* right);
299 void EmitNumberUntagD(LNumberUntagD* instr, Register input,
300 DoubleRegister result, NumberUntagDMode mode);
302 // Emits optimized code for typeof x == "y". Modifies input register.
303 // Returns the condition on which a final split to
304 // true and false label should be made, to optimize fallthrough.
305 // Returns two registers in cmp1 and cmp2 that can be used in the
306 // Branch instruction after EmitTypeofIs.
307 Condition EmitTypeofIs(Label* true_label,
310 Handle<String> type_name,
314 // Emits optimized code for %_IsObject(x). Preserves input register.
315 // Returns the condition on which a final split to
316 // true and false label should be made, to optimize fallthrough.
317 Condition EmitIsObject(Register input,
320 Label* is_not_object,
323 // Emits optimized code for %_IsString(x). Preserves input register.
324 // Returns the condition on which a final split to
325 // true and false label should be made, to optimize fallthrough.
326 Condition EmitIsString(Register input,
328 Label* is_not_string,
329 SmiCheck check_needed);
331 // Emits optimized code for %_IsConstructCall().
332 // Caller should branch on equal condition.
333 void EmitIsConstructCall(Register temp1, Register temp2);
335 // Emits optimized code to deep-copy the contents of statically known
336 // object graphs (e.g. object literal boilerplate).
337 void EmitDeepCopy(Handle<JSObject> object,
341 AllocationSiteMode mode);
342 // Emit optimized code for integer division.
343 // Inputs are signed.
344 // All registers are clobbered.
345 // If 'remainder' is no_reg, it is not computed.
346 void EmitSignedIntegerDivisionByConstant(Register result,
351 LEnvironment* environment);
354 void EnsureSpaceForLazyDeopt(int space_needed) OVERRIDE;
355 void DoLoadKeyedExternalArray(LLoadKeyed* instr);
356 void DoLoadKeyedFixedDoubleArray(LLoadKeyed* instr);
357 void DoLoadKeyedFixedArray(LLoadKeyed* instr);
358 void DoStoreKeyedExternalArray(LStoreKeyed* instr);
359 void DoStoreKeyedFixedDoubleArray(LStoreKeyed* instr);
360 void DoStoreKeyedFixedArray(LStoreKeyed* instr);
363 void EmitVectorLoadICRegisters(T* instr);
365 ZoneList<LEnvironment*> deoptimizations_;
366 ZoneList<Deoptimizer::JumpTableEntry> jump_table_;
367 ZoneList<Handle<Object> > deoptimization_literals_;
368 int inlined_function_count_;
370 TranslationBuffer translations_;
371 ZoneList<LDeferredCode*> deferred_;
373 bool frame_is_built_;
375 // Builder that keeps track of safepoints in the code. The table
376 // itself is emitted at the end of the generated code.
377 SafepointTableBuilder safepoints_;
379 // Compiler from a set of parallel moves to a sequential list of moves.
380 LGapResolver resolver_;
382 Safepoint::Kind expected_safepoint_kind_;
384 class PushSafepointRegistersScope FINAL BASE_EMBEDDED {
386 explicit PushSafepointRegistersScope(LCodeGen* codegen)
387 : codegen_(codegen) {
388 DCHECK(codegen_->info()->is_calling());
389 DCHECK(codegen_->expected_safepoint_kind_ == Safepoint::kSimple);
390 codegen_->expected_safepoint_kind_ = Safepoint::kWithRegisters;
392 StoreRegistersStateStub stub(codegen_->isolate());
393 codegen_->masm_->push(ra);
394 codegen_->masm_->CallStub(&stub);
397 ~PushSafepointRegistersScope() {
398 DCHECK(codegen_->expected_safepoint_kind_ == Safepoint::kWithRegisters);
399 RestoreRegistersStateStub stub(codegen_->isolate());
400 codegen_->masm_->push(ra);
401 codegen_->masm_->CallStub(&stub);
402 codegen_->expected_safepoint_kind_ = Safepoint::kSimple;
409 friend class LDeferredCode;
410 friend class LEnvironment;
411 friend class SafepointGenerator;
412 DISALLOW_COPY_AND_ASSIGN(LCodeGen);
416 class LDeferredCode : public ZoneObject {
418 explicit LDeferredCode(LCodeGen* codegen)
420 external_exit_(NULL),
421 instruction_index_(codegen->current_instruction_) {
422 codegen->AddDeferredCode(this);
425 virtual ~LDeferredCode() {}
426 virtual void Generate() = 0;
427 virtual LInstruction* instr() = 0;
429 void SetExit(Label* exit) { external_exit_ = exit; }
430 Label* entry() { return &entry_; }
431 Label* exit() { return external_exit_ != NULL ? external_exit_ : &exit_; }
432 int instruction_index() const { return instruction_index_; }
435 LCodeGen* codegen() const { return codegen_; }
436 MacroAssembler* masm() const { return codegen_->masm(); }
442 Label* external_exit_;
443 int instruction_index_;
446 } } // namespace v8::internal
448 #endif // V8_MIPS_LITHIUM_CODEGEN_MIPS_H_