[turbofan] Add general support for sp-based frame access

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"
 #include "src/macro-assembler.h"
 #include "src/safepoint-table.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 // Forward declarations.
+class FrameAccessState;
 class Linkage;
 class OutOfLineCode;
 
 struct BranchInfo {
   FlagsCondition condition;
   Label* true_label;
   Label* false_label;
   bool fallthru;
 };
 
 
 // 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_; }
-  Frame* frame() const { return frame_; }
+  FrameAccessState* frame_access_state() const { return frame_access_state_; }
+  Frame* const frame() const { return frame_access_state_->frame(); }
   Isolate* isolate() const { return info_->isolate(); }
   Linkage* linkage() const { return linkage_; }
 
   Label* GetLabel(RpoNumber rpo) { return &labels_[rpo.ToSize()]; }
 
  private:
   MacroAssembler* masm() { return &masm_; }
   GapResolver* resolver() { return &resolver_; }
   SafepointTableBuilder* safepoints() { return &safepoints_; }
   Zone* zone() const { return code()->zone(); }
@@ skipping 70 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);
+  FrameStateDescriptor* GetFrameStateDescriptor(
+      Instruction* instr, size_t frame_access_state_offset);
   int BuildTranslation(Instruction* instr, int pc_offset,
-                       size_t frame_state_offset,
+                       size_t frame_access_state_offset,
                        OutputFrameStateCombine state_combine);
   void BuildTranslationForFrameStateDescriptor(
       FrameStateDescriptor* descriptor, Instruction* instr,
-      Translation* translation, size_t frame_state_offset,
+      Translation* translation, size_t frame_access_state_offset,
       OutputFrameStateCombine state_combine);
   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
@@ skipping 20 matching lines @@
   };
 
   struct HandlerInfo {
     bool caught_locally;
     Label* handler;
     int pc_offset;
   };
 
   friend class OutOfLineCode;
 
-  Frame* const frame_;
+  FrameAccessState* frame_access_state_;
   Linkage* const linkage_;
   InstructionSequence* const code_;
   CompilationInfo* const info_;
   Label* const labels_;
   Label return_label_;
   RpoNumber current_block_;
   SourcePosition current_source_position_;
   MacroAssembler masm_;
   GapResolver resolver_;
   SafepointTableBuilder safepoints_;
   ZoneVector<HandlerInfo> handlers_;
   ZoneDeque<DeoptimizationState*> deoptimization_states_;
   ZoneDeque<Handle<Object>> deoptimization_literals_;
   size_t inlined_function_count_;
   TranslationBuffer translations_;
   int last_lazy_deopt_pc_;
   JumpTable* jump_tables_;
   OutOfLineCode* ools_;
   int osr_pc_offset_;
-  bool needs_frame_;
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_CODE_GENERATOR_H