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      1 // Copyright 2013 the V8 project authors. All rights reserved.
      2 // Redistribution and use in source and binary forms, with or without
      3 // modification, are permitted provided that the following conditions are
      4 // met:
      5 //
      6 //     * Redistributions of source code must retain the above copyright
      7 //       notice, this list of conditions and the following disclaimer.
      8 //     * Redistributions in binary form must reproduce the above
      9 //       copyright notice, this list of conditions and the following
     10 //       disclaimer in the documentation and/or other materials provided
     11 //       with the distribution.
     12 //     * Neither the name of Google Inc. nor the names of its
     13 //       contributors may be used to endorse or promote products derived
     14 //       from this software without specific prior written permission.
     15 //
     16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27 
     28 #ifndef V8_LITHIUM_CODEGEN_H_
     29 #define V8_LITHIUM_CODEGEN_H_
     30 
     31 #include "v8.h"
     32 
     33 #include "compiler.h"
     34 
     35 namespace v8 {
     36 namespace internal {
     37 
     38 class LInstruction;
     39 class LPlatformChunk;
     40 
     41 class LCodeGenBase BASE_EMBEDDED {
     42  public:
     43   LCodeGenBase(LChunk* chunk,
     44                MacroAssembler* assembler,
     45                CompilationInfo* info);
     46   virtual ~LCodeGenBase() {}
     47 
     48   // Simple accessors.
     49   MacroAssembler* masm() const { return masm_; }
     50   CompilationInfo* info() const { return info_; }
     51   Isolate* isolate() const { return info_->isolate(); }
     52   Factory* factory() const { return isolate()->factory(); }
     53   Heap* heap() const { return isolate()->heap(); }
     54   Zone* zone() const { return zone_; }
     55   LPlatformChunk* chunk() const { return chunk_; }
     56   HGraph* graph() const;
     57 
     58   void FPRINTF_CHECKING Comment(const char* format, ...);
     59 
     60   bool GenerateBody();
     61   virtual void GenerateBodyInstructionPre(LInstruction* instr) {}
     62   virtual void GenerateBodyInstructionPost(LInstruction* instr) {}
     63 
     64   virtual void EnsureSpaceForLazyDeopt(int space_needed) = 0;
     65   virtual void RecordAndWritePosition(int position) = 0;
     66 
     67   int GetNextEmittedBlock() const;
     68 
     69   void RegisterDependentCodeForEmbeddedMaps(Handle<Code> code);
     70 
     71  protected:
     72   enum Status {
     73     UNUSED,
     74     GENERATING,
     75     DONE,
     76     ABORTED
     77   };
     78 
     79   LPlatformChunk* const chunk_;
     80   MacroAssembler* const masm_;
     81   CompilationInfo* const info_;
     82   Zone* zone_;
     83   Status status_;
     84   int current_block_;
     85   int current_instruction_;
     86   const ZoneList<LInstruction*>* instructions_;
     87   int last_lazy_deopt_pc_;
     88 
     89   bool is_unused() const { return status_ == UNUSED; }
     90   bool is_generating() const { return status_ == GENERATING; }
     91   bool is_done() const { return status_ == DONE; }
     92   bool is_aborted() const { return status_ == ABORTED; }
     93 };
     94 
     95 
     96 } }  // namespace v8::internal
     97 
     98 #endif  // V8_LITHIUM_CODEGEN_H_
     99