[generators] Perform state dispatch in loop header.

src/interpreter/control-flow-builders.h

 // Copyright 2015 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_INTERPRETER_CONTROL_FLOW_BUILDERS_H_
 #define V8_INTERPRETER_CONTROL_FLOW_BUILDERS_H_
 
 #include "src/interpreter/bytecode-array-builder.h"
 
 #include "src/zone-containers.h"
@@ skipping 69 matching lines @@
 
 // A class to help with co-ordinating break and continue statements with
 // their loop.
 class LoopBuilder final : public BreakableControlFlowBuilder {
  public:
   explicit LoopBuilder(BytecodeArrayBuilder* builder)
       : BreakableControlFlowBuilder(builder),
         continue_sites_(builder->zone()) {}
   ~LoopBuilder();
 
-  void LoopHeader();
+  void LoopHeader(ZoneVector<BytecodeLabel>* additional_labels);
   void Condition() { builder()->Bind(&condition_); }
   void Next() { builder()->Bind(&next_); }
   void JumpToHeader() { builder()->Jump(&loop_header_); }
   void JumpToHeaderIfTrue() { builder()->JumpIfTrue(&loop_header_); }
   void EndLoop();
 
   // This method is called when visiting continue statements in the AST.
   // Inserts a jump to a unbound label that is patched when the corresponding
   // SetContinueTarget is called.
   void Continue() { EmitJump(&continue_sites_); }
@@ skipping 88 matching lines @@
   // this finally block will be caught. Note that such a prediction depends on
   // whether this try-finally is nested inside a surrounding try-catch.
   bool will_catch_;
 };
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_INTERPRETER_CONTROL_FLOW_BUILDERS_H_