[turbofan] Add checked load/store operators.

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 100 matching lines @@
   Frame* frame() const { return gen_->frame(); }
   Isolate* isolate() const { return gen_->isolate(); }
   Linkage* linkage() const { return gen_->linkage(); }
 
  protected:
   CodeGenerator* gen_;
   Instruction* instr_;
 };
 
 
+// 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_; }
+  MacroAssembler* masm() const { return masm_; }
+  OutOfLineCode* next() const { return next_; }
+
+ private:
+  Label entry_;
+  Label exit_;
+  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);
 #endif
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_CODE_GENERATOR_IMPL_H