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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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85 : masm_(masm), | 85 : masm_(masm), |
86 info_(info), | 86 info_(info), |
87 scope_(info->scope()), | 87 scope_(info->scope()), |
88 nesting_stack_(NULL), | 88 nesting_stack_(NULL), |
89 loop_depth_(0), | 89 loop_depth_(0), |
90 globals_(NULL), | 90 globals_(NULL), |
91 context_(NULL), | 91 context_(NULL), |
92 bailout_entries_(info->HasDeoptimizationSupport() | 92 bailout_entries_(info->HasDeoptimizationSupport() |
93 ? info->function()->ast_node_count() : 0, | 93 ? info->function()->ast_node_count() : 0, |
94 info->zone()), | 94 info->zone()), |
95 stack_checks_(2, info->zone()), // There's always at least one. | 95 back_edges_(2, info->zone()), |
96 type_feedback_cells_(info->HasDeoptimizationSupport() | 96 type_feedback_cells_(info->HasDeoptimizationSupport() |
97 ? info->function()->ast_node_count() : 0, | 97 ? info->function()->ast_node_count() : 0, |
98 info->zone()), | 98 info->zone()), |
99 ic_total_count_(0), | 99 ic_total_count_(0), |
100 zone_(info->zone()) { | 100 zone_(info->zone()) { |
101 Initialize(); | 101 Initialize(); |
102 } | 102 } |
103 | 103 |
104 void Initialize(); | 104 void Initialize(); |
105 | 105 |
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128 #elif V8_TARGET_ARCH_X64 | 128 #elif V8_TARGET_ARCH_X64 |
129 static const int kBackEdgeDistanceUnit = 162; | 129 static const int kBackEdgeDistanceUnit = 162; |
130 #elif V8_TARGET_ARCH_ARM | 130 #elif V8_TARGET_ARCH_ARM |
131 static const int kBackEdgeDistanceUnit = 142; | 131 static const int kBackEdgeDistanceUnit = 142; |
132 #elif V8_TARGET_ARCH_MIPS | 132 #elif V8_TARGET_ARCH_MIPS |
133 static const int kBackEdgeDistanceUnit = 142; | 133 static const int kBackEdgeDistanceUnit = 142; |
134 #else | 134 #else |
135 #error Unsupported target architecture. | 135 #error Unsupported target architecture. |
136 #endif | 136 #endif |
137 | 137 |
| 138 static const int kBackEdgeEntrySize = 2 * kIntSize + kOneByteSize; |
138 | 139 |
139 private: | 140 private: |
140 class Breakable; | 141 class Breakable; |
141 class Iteration; | 142 class Iteration; |
142 | 143 |
143 class TestContext; | 144 class TestContext; |
144 | 145 |
145 class NestedStatement BASE_EMBEDDED { | 146 class NestedStatement BASE_EMBEDDED { |
146 public: | 147 public: |
147 explicit NestedStatement(FullCodeGenerator* codegen) : codegen_(codegen) { | 148 explicit NestedStatement(FullCodeGenerator* codegen) : codegen_(codegen) { |
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452 // neither a with nor a catch context. | 453 // neither a with nor a catch context. |
453 void EmitDebugCheckDeclarationContext(Variable* variable); | 454 void EmitDebugCheckDeclarationContext(Variable* variable); |
454 | 455 |
455 // This is meant to be called at loop back edges, |back_edge_target| is | 456 // This is meant to be called at loop back edges, |back_edge_target| is |
456 // the jump target of the back edge and is used to approximate the amount | 457 // the jump target of the back edge and is used to approximate the amount |
457 // of code inside the loop. | 458 // of code inside the loop. |
458 void EmitBackEdgeBookkeeping(IterationStatement* stmt, | 459 void EmitBackEdgeBookkeeping(IterationStatement* stmt, |
459 Label* back_edge_target); | 460 Label* back_edge_target); |
460 // Record the OSR AST id corresponding to a back edge in the code. | 461 // Record the OSR AST id corresponding to a back edge in the code. |
461 void RecordBackEdge(BailoutId osr_ast_id); | 462 void RecordBackEdge(BailoutId osr_ast_id); |
462 // Emit a table of stack check ids and pcs into the code stream. Return | 463 // Emit a table of back edge ids, pcs and loop depths into the code stream. |
463 // the offset of the start of the table. | 464 // Return the offset of the start of the table. |
464 unsigned EmitStackCheckTable(); | 465 unsigned EmitBackEdgeTable(); |
465 | 466 |
466 void EmitProfilingCounterDecrement(int delta); | 467 void EmitProfilingCounterDecrement(int delta); |
467 void EmitProfilingCounterReset(); | 468 void EmitProfilingCounterReset(); |
468 | 469 |
469 // Platform-specific return sequence | 470 // Platform-specific return sequence |
470 void EmitReturnSequence(); | 471 void EmitReturnSequence(); |
471 | 472 |
472 // Platform-specific code sequences for calls | 473 // Platform-specific code sequences for calls |
473 void EmitCallWithStub(Call* expr, CallFunctionFlags flags); | 474 void EmitCallWithStub(Call* expr, CallFunctionFlags flags); |
474 void EmitCallWithIC(Call* expr, Handle<Object> name, RelocInfo::Mode mode); | 475 void EmitCallWithIC(Call* expr, Handle<Object> name, RelocInfo::Mode mode); |
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617 void PopulateTypeFeedbackInfo(Handle<Code> code); | 618 void PopulateTypeFeedbackInfo(Handle<Code> code); |
618 void PopulateTypeFeedbackCells(Handle<Code> code); | 619 void PopulateTypeFeedbackCells(Handle<Code> code); |
619 | 620 |
620 Handle<FixedArray> handler_table() { return handler_table_; } | 621 Handle<FixedArray> handler_table() { return handler_table_; } |
621 | 622 |
622 struct BailoutEntry { | 623 struct BailoutEntry { |
623 BailoutId id; | 624 BailoutId id; |
624 unsigned pc_and_state; | 625 unsigned pc_and_state; |
625 }; | 626 }; |
626 | 627 |
| 628 struct BackEdgeEntry { |
| 629 BailoutId id; |
| 630 unsigned pc; |
| 631 uint8_t loop_depth; |
| 632 }; |
| 633 |
627 struct TypeFeedbackCellEntry { | 634 struct TypeFeedbackCellEntry { |
628 TypeFeedbackId ast_id; | 635 TypeFeedbackId ast_id; |
629 Handle<JSGlobalPropertyCell> cell; | 636 Handle<JSGlobalPropertyCell> cell; |
630 }; | 637 }; |
631 | 638 |
632 | 639 |
633 class ExpressionContext BASE_EMBEDDED { | 640 class ExpressionContext BASE_EMBEDDED { |
634 public: | 641 public: |
635 explicit ExpressionContext(FullCodeGenerator* codegen) | 642 explicit ExpressionContext(FullCodeGenerator* codegen) |
636 : masm_(codegen->masm()), old_(codegen->context()), codegen_(codegen) { | 643 : masm_(codegen->masm()), old_(codegen->context()), codegen_(codegen) { |
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811 Scope* scope_; | 818 Scope* scope_; |
812 Label return_label_; | 819 Label return_label_; |
813 NestedStatement* nesting_stack_; | 820 NestedStatement* nesting_stack_; |
814 int loop_depth_; | 821 int loop_depth_; |
815 ZoneList<Handle<Object> >* globals_; | 822 ZoneList<Handle<Object> >* globals_; |
816 Handle<FixedArray> modules_; | 823 Handle<FixedArray> modules_; |
817 int module_index_; | 824 int module_index_; |
818 const ExpressionContext* context_; | 825 const ExpressionContext* context_; |
819 ZoneList<BailoutEntry> bailout_entries_; | 826 ZoneList<BailoutEntry> bailout_entries_; |
820 GrowableBitVector prepared_bailout_ids_; | 827 GrowableBitVector prepared_bailout_ids_; |
821 // TODO(svenpanne) Rename this to something like back_edges_ and rename | 828 ZoneList<BackEdgeEntry> back_edges_; |
822 // related functions accordingly. | |
823 ZoneList<BailoutEntry> stack_checks_; | |
824 ZoneList<TypeFeedbackCellEntry> type_feedback_cells_; | 829 ZoneList<TypeFeedbackCellEntry> type_feedback_cells_; |
825 int ic_total_count_; | 830 int ic_total_count_; |
826 Handle<FixedArray> handler_table_; | 831 Handle<FixedArray> handler_table_; |
827 Handle<JSGlobalPropertyCell> profiling_counter_; | 832 Handle<JSGlobalPropertyCell> profiling_counter_; |
828 bool generate_debug_code_; | 833 bool generate_debug_code_; |
829 Zone* zone_; | 834 Zone* zone_; |
830 | 835 |
831 friend class NestedStatement; | 836 friend class NestedStatement; |
832 | 837 |
833 DEFINE_AST_VISITOR_SUBCLASS_MEMBERS(); | 838 DEFINE_AST_VISITOR_SUBCLASS_MEMBERS(); |
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853 } | 858 } |
854 | 859 |
855 private: | 860 private: |
856 Zone* zone_; | 861 Zone* zone_; |
857 }; | 862 }; |
858 | 863 |
859 | 864 |
860 } } // namespace v8::internal | 865 } } // namespace v8::internal |
861 | 866 |
862 #endif // V8_FULL_CODEGEN_H_ | 867 #endif // V8_FULL_CODEGEN_H_ |
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