A initial naive codegen implementation, just enough to show the red triangle on the screen.
<rdar://problem/104217343>
Pull request: https://github.com/WebKit/WebKit/pull/8611
Committed 259070@main (06f047e2888c): <https://commits.webkit.org/259070@main> Reviewed commits have been landed. Closing PR #8611 and removing active labels.