[turbofan] Deopt support for escape analysis

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 10 matching lines @@
 class OutOfLineCode;
 
 struct BranchInfo {
   FlagsCondition condition;
   Label* true_label;
   Label* false_label;
   bool fallthru;
 };
 
 
+class InstructionOperandIterator {
+ public:
+  InstructionOperandIterator(Instruction* instr, size_t pos)
+      : instr_(instr), pos_(pos) {}
+
+  Instruction* instruction() const { return instr_; }
+  InstructionOperand* Advance() { return instr_->InputAt(pos_++); }
+
+ private:
+  Instruction* instr_;
+  size_t pos_;
+};
+
+
 // Generates native code for a sequence of instructions.
 class CodeGenerator final : public GapResolver::Assembler {
  public:
   explicit CodeGenerator(Frame* frame, Linkage* linkage,
                          InstructionSequence* code, CompilationInfo* info);
 
   // Generate native code.
   Handle<Code> GenerateCode();
 
   InstructionSequence* code() const { return code_; }
@@ skipping 88 matching lines @@
 
   void RecordCallPosition(Instruction* instr);
   void PopulateDeoptimizationData(Handle<Code> code);
   int DefineDeoptimizationLiteral(Handle<Object> literal);
   FrameStateDescriptor* GetFrameStateDescriptor(
       Instruction* instr, size_t frame_access_state_offset);
   int BuildTranslation(Instruction* instr, int pc_offset,
                        size_t frame_access_state_offset,
                        OutputFrameStateCombine state_combine);
   void BuildTranslationForFrameStateDescriptor(
-      FrameStateDescriptor* descriptor, Instruction* instr,
-      Translation* translation, size_t frame_access_state_offset,
-      OutputFrameStateCombine state_combine);
+      FrameStateDescriptor* descriptor, InstructionOperandIterator* iter,
+      Translation* translation, OutputFrameStateCombine state_combine);
+  void TranslateStateValueDescriptor(StateValueDescriptor* desc,
+                                     Translation* translation,
+                                     InstructionOperandIterator* iter);
+  void TranslateFrameStateDescriptorOperands(FrameStateDescriptor* desc,
+                                             InstructionOperandIterator* iter,
+                                             OutputFrameStateCombine combine,
+                                             Translation* translation);
   void AddTranslationForOperand(Translation* translation, Instruction* instr,
                                 InstructionOperand* op, MachineType type);
   void AddNopForSmiCodeInlining();
   void EnsureSpaceForLazyDeopt();
   void MarkLazyDeoptSite();
 
   // Converts the delta in the number of stack parameter passed from a tail
   // caller to the callee into the distance (in pointers) the SP must be
   // adjusted, taking frame elision and other relevant factors into
   // consideration.
@@ skipping 46 matching lines @@
   JumpTable* jump_tables_;
   OutOfLineCode* ools_;
   int osr_pc_offset_;
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_CODE_GENERATOR_H