[ignition] desugar GetIterator() via bytecode rather than via AST

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-analysis.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/liveness-analyzer.h"
@@ skipping 164 matching lines @@
   // Control flow plumbing.
   void BuildJump();
   void BuildJumpIf(Node* condition);
   void BuildJumpIfNot(Node* condition);
   void BuildJumpIfEqual(Node* comperand);
   void BuildJumpIfTrue();
   void BuildJumpIfFalse();
   void BuildJumpIfToBooleanTrue();
   void BuildJumpIfToBooleanFalse();
   void BuildJumpIfNotHole();
+  void BuildJumpIfJSReceiver();
 
   // Simulates control flow by forward-propagating environments.
   void MergeIntoSuccessorEnvironment(int target_offset);
   void BuildLoopHeaderEnvironment(int current_offset);
   void SwitchToMergeEnvironment(int current_offset);
 
   // Simulates control flow that exits the function body.
   void MergeControlToLeaveFunction(Node* exit);
 
   // Builds entry points that are used by OSR deconstruction.
@@ skipping 27 matching lines @@
     int handler_offset_;    // Handler entry offset within the bytecode.
     int context_register_;  // Index of register holding handler context.
   };
 
   // Field accessors
   Graph* graph() const { return jsgraph_->graph(); }
   CommonOperatorBuilder* common() const { return jsgraph_->common(); }
   Zone* graph_zone() const { return graph()->zone(); }
   JSGraph* jsgraph() const { return jsgraph_; }
   JSOperatorBuilder* javascript() const { return jsgraph_->javascript(); }
+  SimplifiedOperatorBuilder* simplified() const {
+    return jsgraph_->simplified();
+  }
   Zone* local_zone() const { return local_zone_; }
   const Handle<BytecodeArray>& bytecode_array() const {
     return bytecode_array_;
   }
   const Handle<HandlerTable>& exception_handler_table() const {
     return exception_handler_table_;
   }
   const Handle<TypeFeedbackVector>& feedback_vector() const {
     return feedback_vector_;
   }
@@ skipping 74 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_