[ignition] Add global lookup fast path to generated turbofan graph

src/compiler/bytecode-graph-builder.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_COMPILER_BYTECODE_GRAPH_BUILDER_H_
 #define V8_COMPILER_BYTECODE_GRAPH_BUILDER_H_
 
 #include "src/compiler/bytecode-branch-analysis.h"
 #include "src/compiler/bytecode-loop-analysis.h"
 #include "src/compiler/js-graph.h"
@@ skipping 106 matching lines @@
                                     interpreter::Register first_arg,
                                     size_t arity);
 
   // Computes register liveness and replaces dead ones in frame states with the
   // undefined values.
   void ClearNonLiveSlotsInFrameStates();
 
   void BuildCreateLiteral(const Operator* op);
   void BuildCreateArguments(CreateArgumentsType type);
   Node* BuildLoadContextSlot();
-  Node* BuildLoadGlobal(TypeofMode typeof_mode);
+  Node* BuildLoadGlobal(uint32_t feedback_slot_index, TypeofMode typeof_mode);
   void BuildStoreGlobal(LanguageMode language_mode);
   Node* BuildNamedLoad();
   void BuildNamedStore(LanguageMode language_mode);
   Node* BuildKeyedLoad();
   void BuildKeyedStore(LanguageMode language_mode);
   void BuildLdaLookupSlot(TypeofMode typeof_mode);
   void BuildLdaLookupContextSlot(TypeofMode typeof_mode);
   void BuildLdaLookupGlobalSlot(TypeofMode typeof_mode);
   void BuildStaLookupSlot(LanguageMode language_mode);
   void BuildCall(TailCallMode tail_call_mode);
   void BuildThrow();
   void BuildBinaryOp(const Operator* op);
   void BuildBinaryOpWithImmediate(const Operator* op);
   void BuildCompareOp(const Operator* op);
   void BuildDelete(LanguageMode language_mode);
   void BuildCastOperator(const Operator* op);
   void BuildForInPrepare();
   void BuildForInNext();
   void BuildInvokeIntrinsic();
 
+  // Check the context chain for extensions, for lookup fast paths.
+  Environment* CheckContextExtensions(uint32_t depth);
+
   // Helper function to create binary operation hint from the recorded
   // type feedback.
   BinaryOperationHint GetBinaryOperationHint(int operand_index);
 
   // Helper function to create compare operation hint from the recorded
   // type feedback.
   CompareOperationHint GetCompareOperationHint();
 
   // Helper function to compute call frequency from the recorded type
   // feedback.
@@ skipping 145 matching lines @@
   static int const kBinaryOperationSmiHintIndex = 2;
 
   DISALLOW_COPY_AND_ASSIGN(BytecodeGraphBuilder);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_BYTECODE_GRAPH_BUILDER_H_