[turbofan] Initial support for Switch.

src/compiler/code-generator.h

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_COMPILER_CODE_GENERATOR_H_
 #define V8_COMPILER_CODE_GENERATOR_H_
 
 #include "src/compiler/gap-resolver.h"
 #include "src/compiler/instruction.h"
 #include "src/deoptimizer.h"
@@ skipping 51 matching lines @@
   void AssembleInstruction(Instruction* instr);
   void AssembleSourcePosition(SourcePositionInstruction* instr);
   void AssembleGap(GapInstruction* gap);
 
   // ===========================================================================
   // ============= Architecture-specific code generation methods. ==============
   // ===========================================================================
 
   void AssembleArchInstruction(Instruction* instr);
   void AssembleArchJump(BasicBlock::RpoNumber target);
+  void AssembleArchSwitch(Instruction* instr);
   void AssembleArchBranch(Instruction* instr, BranchInfo* branch);
   void AssembleArchBoolean(Instruction* instr, FlagsCondition condition);
 
   void AssembleDeoptimizerCall(int deoptimization_id);
 
   // Generates an architecture-specific, descriptor-specific prologue
   // to set up a stack frame.
   void AssemblePrologue();
   // Generates an architecture-specific, descriptor-specific return sequence
   // to tear down a stack frame.
   void AssembleReturn();
 
   // ===========================================================================
   // ============== Architecture-specific gap resolver methods. ================
   // ===========================================================================
 
   // Interface used by the gap resolver to emit moves and swaps.
   void AssembleMove(InstructionOperand* source,
                     InstructionOperand* destination) FINAL;
   void AssembleSwap(InstructionOperand* source,
                     InstructionOperand* destination) FINAL;
 
   // ===========================================================================
+  // =================== Jump table construction methods. ======================
+  // ===========================================================================
+
+  class JumpTable;
+  // Adds a jump table that is emitted after the actual code.  Returns label
+  // pointing to the beginning of the table.  {targets} is assumed to be static
+  // or zone allocated.
+  Label* AddJumpTable(Label** targets, size_t target_count);
+  // Emits a jump table.
+  void AssembleJumpTable(Label** targets, size_t target_count);
+
+  // ===========================================================================
   // Deoptimization table construction
   void AddSafepointAndDeopt(Instruction* instr);
   void PopulateDeoptimizationData(Handle<Code> code);
   int DefineDeoptimizationLiteral(Handle<Object> literal);
   FrameStateDescriptor* GetFrameStateDescriptor(Instruction* instr,
                                                 size_t frame_state_offset);
   int BuildTranslation(Instruction* instr, int pc_offset,
                        size_t frame_state_offset,
                        OutputFrameStateCombine state_combine);
   void BuildTranslationForFrameStateDescriptor(
@@ skipping 33 matching lines @@
   Label* const labels_;
   BasicBlock::RpoNumber current_block_;
   SourcePosition current_source_position_;
   MacroAssembler masm_;
   GapResolver resolver_;
   SafepointTableBuilder safepoints_;
   ZoneDeque<DeoptimizationState*> deoptimization_states_;
   ZoneDeque<Handle<Object> > deoptimization_literals_;
   TranslationBuffer translations_;
   int last_lazy_deopt_pc_;
+  JumpTable* jump_tables_;
   OutOfLineCode* ools_;
   int osr_pc_offset_;
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_CODE_GENERATOR_H