Port 40c0f84a

Original Commit Message:

    Since we were already loading the undefined value a few lines above,
    we could avoid loading it again.

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

Change-Id: Ibda02f97ab5472aabfa02eb16b8db4b50035b27b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1827539Reviewed-by: Junliang Yan <jyan@ca.ibm.com>
Commit-Queue: Milad Farazmand <miladfar@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#63989}