Port 80dc6a33

Original Commit Message:

    Since smi-corrputing, TaggedSigned (aka known smis) only have the lower
    bits used. This renders CompressedSigned useless.

R=solanes@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=
LOG=N

Change-Id: Ia3daa8e8fe60e8046784436b3dfcdad63b6597c6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1907442Reviewed-by: Junliang Yan <jyan@ca.ibm.com>
Commit-Queue: Milad Farazmand <miladfar@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#64891}