Reland of [turbofan] Implicitly emit eager checkpoint at graph building.

src/compiler/ast-graph-builder.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_AST_GRAPH_BUILDER_H_
 #define V8_COMPILER_AST_GRAPH_BUILDER_H_
 
 #include "src/ast/ast.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/liveness-analyzer.h"
@@ skipping 427 matching lines @@
 
   // Dispatched from VisitCompareOperation.
   void VisitLiteralCompareNil(CompareOperation* expr, Expression* sub_expr,
                               Node* nil_value);
   void VisitLiteralCompareTypeof(CompareOperation* expr, Expression* sub_expr,
                                  Handle<String> check);
 
   // Dispatched from VisitForInStatement.
   void VisitForInAssignment(Expression* expr, Node* value,
                             const VectorSlotPair& feedback,
-                            BailoutId bailout_id_before,
-                            BailoutId bailout_id_after);
+                            BailoutId bailout_id);
 
   // Dispatched from VisitObjectLiteral.
   void VisitObjectLiteralAccessor(Node* home_object,
                                   ObjectLiteralProperty* property);
 
   // Dispatched from VisitClassLiteral.
   void VisitClassLiteralContents(ClassLiteral* expr);
 
   DEFINE_AST_VISITOR_SUBCLASS_MEMBERS();
   DISALLOW_COPY_AND_ASSIGN(AstGraphBuilder);
@@ skipping 142 matching lines @@
 
   // Prepare environment to be used as loop header.
   void PrepareForLoop(BitVector* assigned, bool is_osr = false);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_AST_GRAPH_BUILDER_H_