1// Copyright 2013 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_CRANKSHAFT_LITHIUM_CODEGEN_H_
6#define V8_CRANKSHAFT_LITHIUM_CODEGEN_H_
7
8#include "src/bailout-reason.h"
9#include "src/deoptimizer.h"
10#include "src/source-position-table.h"
11
12namespace v8 {
13namespace internal {
14
15class CompilationInfo;
16class HGraph;
17class LChunk;
18class LEnvironment;
19class LInstruction;
20class LPlatformChunk;
21
22class LCodeGenBase BASE_EMBEDDED {
23 public:
24  LCodeGenBase(LChunk* chunk,
25               MacroAssembler* assembler,
26               CompilationInfo* info);
27  virtual ~LCodeGenBase() {}
28
29  // Simple accessors.
30  MacroAssembler* masm() const { return masm_; }
31  CompilationInfo* info() const { return info_; }
32  Isolate* isolate() const;
33  Factory* factory() const { return isolate()->factory(); }
34  Heap* heap() const { return isolate()->heap(); }
35  Zone* zone() const { return zone_; }
36  LPlatformChunk* chunk() const { return chunk_; }
37  HGraph* graph() const;
38  SourcePositionTableBuilder* source_position_table_builder() {
39    return &source_position_table_builder_;
40  }
41
42  void PRINTF_FORMAT(2, 3) Comment(const char* format, ...);
43  void DeoptComment(const Deoptimizer::DeoptInfo& deopt_info);
44  static Deoptimizer::DeoptInfo MakeDeoptInfo(LInstruction* instr,
45                                              DeoptimizeReason deopt_reason,
46                                              int deopt_id);
47
48  bool GenerateBody();
49  virtual void GenerateBodyInstructionPre(LInstruction* instr) {}
50  virtual void GenerateBodyInstructionPost(LInstruction* instr) {}
51
52  virtual void EnsureSpaceForLazyDeopt(int space_needed) = 0;
53  void RecordAndWritePosition(SourcePosition position);
54
55  int GetNextEmittedBlock() const;
56
57  void WriteTranslationFrame(LEnvironment* environment,
58                             Translation* translation);
59  int DefineDeoptimizationLiteral(Handle<Object> literal);
60
61  void PopulateDeoptimizationData(Handle<Code> code);
62  void PopulateDeoptimizationLiteralsWithInlinedFunctions();
63
64  // Check that an environment assigned via AssignEnvironment is actually being
65  // used. Redundant assignments keep things alive longer than necessary, and
66  // consequently lead to worse code, so it's important to minimize this.
67  void CheckEnvironmentUsage();
68
69 protected:
70  enum Status {
71    UNUSED,
72    GENERATING,
73    DONE,
74    ABORTED
75  };
76
77  LPlatformChunk* const chunk_;
78  MacroAssembler* const masm_;
79  CompilationInfo* const info_;
80  Zone* zone_;
81  Status status_;
82  int current_block_;
83  int current_instruction_;
84  const ZoneList<LInstruction*>* instructions_;
85  ZoneList<LEnvironment*> deoptimizations_;
86  ZoneList<Handle<Object> > deoptimization_literals_;
87  TranslationBuffer translations_;
88  int inlined_function_count_;
89  int last_lazy_deopt_pc_;
90  int osr_pc_offset_;
91  SourcePositionTableBuilder source_position_table_builder_;
92
93  bool is_unused() const { return status_ == UNUSED; }
94  bool is_generating() const { return status_ == GENERATING; }
95  bool is_done() const { return status_ == DONE; }
96  bool is_aborted() const { return status_ == ABORTED; }
97
98  void Abort(BailoutReason reason);
99  void Retry(BailoutReason reason);
100
101  // Methods for code dependencies.
102  void AddDeprecationDependency(Handle<Map> map);
103  void AddStabilityDependency(Handle<Map> map);
104};
105
106
107}  // namespace internal
108}  // namespace v8
109
110#endif  // V8_CRANKSHAFT_LITHIUM_CODEGEN_H_
111