[Interpreter] Transform StrictEquality with null/undefined to special bytecodes.

src/compiler/bytecode-graph-builder.cc

 // 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.
 
 #include "src/compiler/bytecode-graph-builder.h"
 
 #include "src/ast/ast.h"
 #include "src/ast/scopes.h"
 #include "src/compilation-info.h"
 #include "src/compiler/compiler-source-position-table.h"
@@ skipping 1647 matching lines @@
   BuildCompareOp(javascript()->InstanceOf());
 }
 
 void BytecodeGraphBuilder::VisitTestUndetectable() {
   Node* object =
       environment()->LookupRegister(bytecode_iterator().GetRegisterOperand(0));
   Node* node = NewNode(jsgraph()->simplified()->ObjectIsUndetectable(), object);
   environment()->BindAccumulator(node);
 }
 
+void BytecodeGraphBuilder::VisitTestNull() {
+  Node* object =
+      environment()->LookupRegister(bytecode_iterator().GetRegisterOperand(0));
+  Node* result = NewNode(javascript()->StrictEqual(CompareOperationHint::kAny),
+                         object, jsgraph()->NullConstant());
+  environment()->BindAccumulator(result);
+}
+
+void BytecodeGraphBuilder::VisitTestUndefined() {
+  Node* object =
+      environment()->LookupRegister(bytecode_iterator().GetRegisterOperand(0));
+  Node* result = NewNode(javascript()->StrictEqual(CompareOperationHint::kAny),
+                         object, jsgraph()->UndefinedConstant());
+  environment()->BindAccumulator(result);
+}
+
 void BytecodeGraphBuilder::BuildCastOperator(const Operator* js_op) {
   PrepareEagerCheckpoint();
   Node* value = NewNode(js_op, environment()->LookupAccumulator());
   environment()->BindRegister(bytecode_iterator().GetRegisterOperand(0), value,
                               Environment::kAttachFrameState);
 }
 
 void BytecodeGraphBuilder::VisitToName() {
   BuildCastOperator(javascript()->ToName());
 }
@@ skipping 558 matching lines @@
         it->source_position().ScriptOffset(), start_position_.InliningId()));
     it->Advance();
   } else {
     DCHECK_GT(it->code_offset(), offset);
   }
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8