Revert of [compiler] Drop the CompareNilIC.

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index 1cd0c7cdb43f990fed5740369a16c75f90485307..2f322b80f7800f35abc4604eab8b24bbfd54cc75 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -4686,7 +4686,8 @@
   return kind() == STUB || kind() == HANDLER || kind() == LOAD_IC ||
          kind() == KEYED_LOAD_IC || kind() == CALL_IC || kind() == STORE_IC ||
          kind() == KEYED_STORE_IC || kind() == BINARY_OP_IC ||
-         kind() == COMPARE_IC || kind() == TO_BOOLEAN_IC;
+         kind() == COMPARE_IC || kind() == COMPARE_NIL_IC ||
+         kind() == TO_BOOLEAN_IC;
 }
 
 
@@ -4976,6 +4977,7 @@
 bool Code::is_call_stub() { return kind() == CALL_IC; }
 bool Code::is_binary_op_stub() { return kind() == BINARY_OP_IC; }
 bool Code::is_compare_ic_stub() { return kind() == COMPARE_IC; }
+bool Code::is_compare_nil_ic_stub() { return kind() == COMPARE_NIL_IC; }
 bool Code::is_to_boolean_ic_stub() { return kind() == TO_BOOLEAN_IC; }
 bool Code::is_optimized_code() { return kind() == OPTIMIZED_FUNCTION; }
 bool Code::is_wasm_code() { return kind() == WASM_FUNCTION; }
@@ -4983,7 +4985,7 @@
 bool Code::embeds_maps_weakly() {
   Kind k = kind();
   return (k == LOAD_IC || k == STORE_IC || k == KEYED_LOAD_IC ||
-          k == KEYED_STORE_IC) &&
+          k == KEYED_STORE_IC || k == COMPARE_NIL_IC) &&
          ic_state() == MONOMORPHIC;
 }