Port d0e6ff15
https://crrev.com/c/2285149

Port 34871edd
https://crrev.com/c/2284212

Port dc82799d
https://crrev.com/c/2290623

Change-Id: I8cceface23368dafc6a029edaa7c6a125a0760ed
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2291306
Commit-Queue: Zhao Jiazhong <zhaojiazhong-hf@loongson.cn>
Reviewed-by: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68856}