FTL doesn't observe the use kind of CheckIsConstant's child1
Created attachment 397008 [details] Patch
Comment on attachment 397008 [details] Patch r=me
Committed r260397: <https://trac.webkit.org/changeset/260397> All reviewed patches have been landed. Closing bug and clearing flags on attachment 397008 [details].
<rdar://problem/62074958>