Port 7177d87f

Original Commit Message:

    Reorders the Smi check and the empty OptimizationMarker check as the
    latter implies the first and means there is now just a single comparison
    on the fast path.

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

Change-Id: I4129e8d710d25fb1df02742816ab3b56430a7523
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1841611Reviewed-by: Junliang Yan <jyan@ca.ibm.com>
Commit-Queue: Junliang Yan <jyan@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#64113}