[fullcodegen] Remove dead hole check logic

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/compiler-source-position-table.h"
 #include "src/compiler/js-graph.h"
@@ skipping 291 matching lines @@
   Node* BuildToBoolean(Node* input, TypeFeedbackId feedback_id);
   Node* BuildToObject(Node* input, BailoutId bailout_id);
 
   // Builder for adding the [[HomeObject]] to a value if the value came from a
   // function literal and needs a home object. Do nothing otherwise.
   Node* BuildSetHomeObject(Node* value, Node* home_object,
                            LiteralProperty* property, int slot_number = 0);
 
   // Builders for error reporting at runtime.
   Node* BuildThrowError(Node* exception, BailoutId bailout_id);
-  Node* BuildThrowReferenceError(Variable* var, BailoutId bailout_id);
   Node* BuildThrowConstAssignError(BailoutId bailout_id);
 
-  // Builders for dynamic hole-checks at runtime.
-  Node* BuildHoleCheckThenThrow(Node* value, Variable* var, Node* not_hole,
-                                BailoutId bailout_id);
-  Node* BuildHoleCheckElseThrow(Node* value, Variable* var, Node* for_hole,
-                                BailoutId bailout_id);
-
   // Builders for non-local control flow.
   Node* BuildReturn(Node* return_value);
   Node* BuildThrow(Node* exception_value);
 
   // Builders for binary operations.
   Node* BuildBinaryOp(Node* left, Node* right, Token::Value op,
                       TypeFeedbackId feedback_id);
 
   // Process arguments to a call by popping {arity} elements off the operand
   // stack and build a call node using the given call operator.
@@ skipping 254 matching lines @@
  private:
   SourcePositionTable* const source_positions_;
   SourcePosition const start_position_;
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_AST_GRAPH_BUILDER_H_