[turbofan] Deopt support for escape analysis

src/compiler/code-generator.h

Index: src/compiler/code-generator.h
diff --git a/src/compiler/code-generator.h b/src/compiler/code-generator.h
index 59a5af9a0703597ebe51c09bb72c030caecd34f6..da33ff2e809755d3a4a4a2ea06ab814baca37de5 100644
--- a/src/compiler/code-generator.h
+++ b/src/compiler/code-generator.h
@@ -28,6 +28,20 @@ struct BranchInfo {
 };
 
 
+class InstructionOperandIterator {
+ public:
+  InstructionOperandIterator(Instruction* instr, size_t pos)
+      : instr_(instr), pos_(pos) {}
+
+  Instruction* instruction() const { return instr_; }
+  InstructionOperand* advance() { return instr_->InputAt(pos_++); }

[Jarin, 2016/01/05 12:51:18]

style nit: advance -> Advance, only simple accessors should start with
lowercase.

[sigurds, 2016/01/05 13:08:57]

Done.

+
+ private:
+  Instruction* instr_;
+  size_t pos_;
+};
+
+
 // Generates native code for a sequence of instructions.
 class CodeGenerator final : public GapResolver::Assembler {
  public:
@@ -136,9 +150,15 @@ class CodeGenerator final : public GapResolver::Assembler {
                        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();