port 0f624aae
https://crrev.com/c/2208686

port 839e9695
https://crrev.com/c/2208610

port 51847be8
https://crrev.com/c/2216930

Change-Id: I11046631b575a521d11c17ea5c418bfc7d900e8a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2219749Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Zhao Jiazhong <zhaojiazhong-hf@loongson.cn>
Cr-Commit-Position: refs/heads/master@{#68068}