[turbofan] Add support for deferred code.

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 <deque>
 
 #include "src/compiler/gap-resolver.h"
@@ skipping 21 matching lines @@
   Linkage* linkage() const { return linkage_; }
 
  private:
   MacroAssembler* masm() { return &masm_; }
   GapResolver* resolver() { return &resolver_; }
   SafepointTableBuilder* safepoints() { return &safepoints_; }
   Zone* zone() const { return code()->zone(); }
 
   // Checks if {block} will appear directly after {current_block_} when
   // assembling code, in which case, a fall-through can be used.
-  bool IsNextInAssemblyOrder(BasicBlock::RpoNumber block) const {
-    return current_block_.IsNext(block);
-  }
+  bool IsNextInAssemblyOrder(BasicBlock::RpoNumber block) const;
 
   // Record a safepoint with the given pointer map.
   void RecordSafepoint(PointerMap* pointers, Safepoint::Kind kind,
                        int arguments, Safepoint::DeoptMode deopt_mode);
 
   // Assemble code for the specified instruction.
   void AssembleInstruction(Instruction* instr);
   void AssembleSourcePosition(SourcePositionInstruction* instr);
   void AssembleGap(GapInstruction* gap);
 
@@ skipping 74 matching lines @@
   ZoneDeque<Handle<Object> > deoptimization_literals_;
   TranslationBuffer translations_;
   int last_lazy_deopt_pc_;
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_CODE_GENERATOR_H