[Interpreter] Optimize code of the form 'if (x === undefined)'.

src/interpreter/bytecode-array-builder.h

Index: src/interpreter/bytecode-array-builder.h
diff --git a/src/interpreter/bytecode-array-builder.h b/src/interpreter/bytecode-array-builder.h
index b4676778be0db2c12368ad6594efc561e0169ac0..98703473d7937ad8c9aea8e53b47d821a616fb84 100644
--- a/src/interpreter/bytecode-array-builder.h
+++ b/src/interpreter/bytecode-array-builder.h
@@ -314,6 +314,10 @@ class V8_EXPORT_PRIVATE BytecodeArrayBuilder final
   BytecodeArrayBuilder& CompareOperation(Token::Value op, Register reg,
                                          int feedback_slot);
   BytecodeArrayBuilder& CompareOperation(Token::Value op, Register reg);
+  BytecodeArrayBuilder& CompareUndetectable();
+  BytecodeArrayBuilder& CompareUndefined();
+  BytecodeArrayBuilder& CompareNull();
+  BytecodeArrayBuilder& CompareNil(Token::Value op, NilValue nil);
   BytecodeArrayBuilder& CompareTypeOf(
       TestTypeOfFlags::LiteralFlag literal_flag);
 
@@ -332,7 +336,13 @@ class V8_EXPORT_PRIVATE BytecodeArrayBuilder final
   BytecodeArrayBuilder& JumpIfNotHole(BytecodeLabel* label);
   BytecodeArrayBuilder& JumpIfJSReceiver(BytecodeLabel* label);
   BytecodeArrayBuilder& JumpIfNull(BytecodeLabel* label);
+  BytecodeArrayBuilder& JumpIfNotNull(BytecodeLabel* label);
   BytecodeArrayBuilder& JumpIfUndefined(BytecodeLabel* label);
+  BytecodeArrayBuilder& JumpIfNotUndefined(BytecodeLabel* label);
+  BytecodeArrayBuilder& JumpIfNil(BytecodeLabel* label, Token::Value op,
+                                  NilValue nil);
+  BytecodeArrayBuilder& JumpIfNotNil(BytecodeLabel* label, Token::Value op,
+                                     NilValue nil);
   BytecodeArrayBuilder& JumpLoop(BytecodeLabel* label, int loop_depth);
 
   BytecodeArrayBuilder& StackCheck(int position);