Port fc29c453
Port 8ef2f799

R=zhiguo.zhou@intel.com, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=
LOG=N

Change-Id: If84d63be9864ab2ff10b522018ecbac0c56b2bea
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2154765Reviewed-by: Junliang Yan <jyan@ca.ibm.com>
Commit-Queue: Milad Farazmand <miladfar@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#67209}