[Interpreter] Optimize equality check with null/undefined with a check on the map.

src/interpreter/bytecode-peephole-table.h

 // Copyright 2016 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_INTERPRETER_BYTECODE_PEEPHOLE_TABLE_H_
 #define V8_INTERPRETER_BYTECODE_PEEPHOLE_TABLE_H_
 
 #include "src/interpreter/bytecodes.h"
 
 namespace v8 {
 namespace internal {
 namespace interpreter {
 
-#define PEEPHOLE_NON_JUMP_ACTION_LIST(V)            \
-  V(DefaultAction)                                  \
-  V(UpdateLastAction)                               \
-  V(UpdateLastIfSourceInfoPresentAction)            \
-  V(ElideCurrentAction)                             \
-  V(ElideCurrentIfOperand0MatchesAction)            \
-  V(ElideLastAction)                                \
-  V(ChangeBytecodeAction)                           \
-  V(TransformLdaSmiBinaryOpToBinaryOpWithSmiAction) \
-  V(TransformLdaZeroBinaryOpToBinaryOpWithZeroAction)
+#define PEEPHOLE_NON_JUMP_ACTION_LIST(V)              \
+  V(DefaultAction)                                    \
+  V(UpdateLastAction)                                 \
+  V(UpdateLastIfSourceInfoPresentAction)              \
+  V(ElideCurrentAction)                               \
+  V(ElideCurrentIfOperand0MatchesAction)              \
+  V(ElideLastAction)                                  \
+  V(ChangeBytecodeAction)                             \
+  V(TransformLdaSmiBinaryOpToBinaryOpWithSmiAction)   \
+  V(TransformLdaZeroBinaryOpToBinaryOpWithZeroAction) \
+  V(TransformEqualityWithNullOrUndefinedToTestUndetectableAction)
 
 #define PEEPHOLE_JUMP_ACTION_LIST(V) \
   V(DefaultJumpAction)               \
   V(UpdateLastJumpAction)            \
   V(ChangeJumpBytecodeAction)        \
   V(ElideLastBeforeJumpAction)
 
 #define PEEPHOLE_ACTION_LIST(V)    \
   PEEPHOLE_NON_JUMP_ACTION_LIST(V) \
   PEEPHOLE_JUMP_ACTION_LIST(V)
@@ skipping 28 matching lines @@
 
   static const PeepholeActionAndData row_data_[][kNumberOfBytecodes];
   static const PeepholeActionAndData* const row_[kNumberOfBytecodes];
 };
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_INTERPRETER_BYTECODE_PEEPHOLE_TABLE_H_