[turbofan] CodeGenerator: Frame setup refactoring

src/compiler/code-generator-impl.h

 // Copyright 2013 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_IMPL_H_
 #define V8_COMPILER_CODE_GENERATOR_IMPL_H_
 
 #include "src/code-stubs.h"
 #include "src/compiler/code-generator.h"
 #include "src/compiler/instruction.h"
@@ skipping 109 matching lines @@
   float ToFloat32(InstructionOperand* op) { return ToConstant(op).ToFloat32(); }
 
   ExternalReference ToExternalReference(InstructionOperand* op) {
     return ToConstant(op).ToExternalReference();
   }
 
   Handle<HeapObject> ToHeapObject(InstructionOperand* op) {
     return ToConstant(op).ToHeapObject();
   }
 
-  Frame* frame() const { return gen_->frame(); }
+  const Frame* frame() const { return gen_->frame(); }
   FrameAccessState* frame_access_state() const {
     return gen_->frame_access_state();
   }
   Isolate* isolate() const { return gen_->isolate(); }
   Linkage* linkage() const { return gen_->linkage(); }
 
  protected:
   CodeGenerator* gen_;
   Instruction* instr_;
 };
@@ skipping 15 matching lines @@
 // Generator for out-of-line code that is emitted after the main code is done.
 class OutOfLineCode : public ZoneObject {
  public:
   explicit OutOfLineCode(CodeGenerator* gen);
   virtual ~OutOfLineCode();
 
   virtual void Generate() = 0;
 
   Label* entry() { return &entry_; }
   Label* exit() { return &exit_; }
-  Frame* frame() const { return frame_; }
+  const Frame* frame() const { return frame_; }
   Isolate* isolate() const { return masm()->isolate(); }
   MacroAssembler* masm() const { return masm_; }
   OutOfLineCode* next() const { return next_; }
 
  private:
   Label entry_;
   Label exit_;
-  Frame* const frame_;
+  const Frame* const frame_;
   MacroAssembler* const masm_;
   OutOfLineCode* const next_;
 };
 
 
 // TODO(dcarney): generify this on bleeding_edge and replace this call
 // when merged.
 static inline void FinishCode(MacroAssembler* masm) {
 #if V8_TARGET_ARCH_ARM64 || V8_TARGET_ARCH_ARM
   masm->CheckConstPool(true, false);
 #elif V8_TARGET_ARCH_IA32 || V8_TARGET_ARCH_X64
   masm->ud2();
 #endif
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_CODE_GENERATOR_IMPL_H