[turbofan] Add support for eager/soft deoptimization reasons.

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/compiler/unwinding-info-writer.h"
@@ skipping 184 matching lines @@
   // Emits a jump table.
   void AssembleJumpTable(Label** targets, size_t target_count);
 
   // ===========================================================================
   // ================== Deoptimization table construction. =====================
   // ===========================================================================
 
   void RecordCallPosition(Instruction* instr);
   void PopulateDeoptimizationData(Handle<Code> code);
   int DefineDeoptimizationLiteral(Handle<Object> literal);
-  FrameStateDescriptor* GetFrameStateDescriptor(Instruction* instr,
-                                                size_t frame_state_offset);
+  DeoptimizationEntry const& GetDeoptimizationEntry(Instruction* instr,
+                                                    size_t frame_state_offset);
+  DeoptimizeReason GetDeoptimizationReason(int deoptimization_id) const;
   int BuildTranslation(Instruction* instr, int pc_offset,
                        size_t frame_state_offset,
                        OutputFrameStateCombine state_combine);
   void BuildTranslationForFrameStateDescriptor(
       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 EnsureSpaceForLazyDeopt();
   void MarkLazyDeoptSite();
 
   DeoptimizationExit* AddDeoptimizationExit(Instruction* instr,
                                             size_t frame_state_offset);
 
   // ===========================================================================
 
-  struct DeoptimizationState : ZoneObject {
+  class DeoptimizationState final : public ZoneObject {
    public:
+    DeoptimizationState(BailoutId bailout_id, int translation_id, int pc_offset,
+                        DeoptimizeReason reason)
+        : bailout_id_(bailout_id),
+          translation_id_(translation_id),
+          pc_offset_(pc_offset),
+          reason_(reason) {}
+
     BailoutId bailout_id() const { return bailout_id_; }
     int translation_id() const { return translation_id_; }
     int pc_offset() const { return pc_offset_; }
-
-    DeoptimizationState(BailoutId bailout_id, int translation_id, int pc_offset)
-        : bailout_id_(bailout_id),
-          translation_id_(translation_id),
-          pc_offset_(pc_offset) {}
+    DeoptimizeReason reason() const { return reason_; }
 
    private:
     BailoutId bailout_id_;
     int translation_id_;
     int pc_offset_;
+    DeoptimizeReason reason_;
   };
 
   struct HandlerInfo {
     bool caught_locally;
     Label* handler;
     int pc_offset;
   };
 
   friend class OutOfLineCode;
 
@@ skipping 20 matching lines @@
   OutOfLineCode* ools_;
   int osr_pc_offset_;
   SourcePositionTableBuilder source_position_table_builder_;
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_CODE_GENERATOR_H