Constant pool must be marked as unavailable for use after the caller's pointer has been restored ahead of the tail call.

R=joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, ishell@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1641743002

Cr-Commit-Position: refs/heads/master@{#33563}