<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Dear llvm developers,<div class=""><br class=""></div><div class="">For the purpose of a research project, I want to add a function type modifier as an extension to LLVM that looks like </div><div class=""><br class=""></div><div class=""><font face="Courier" class="">keyword void function(params1, 2, 3) {…}</font></div><div class=""><br class=""></div><div class="">to serve the purpose of tracking all registers that the function has touched. Is there any documentation or previous examples relate to this feature?</div><div class=""><br class=""></div><div class="">Thank you very much</div><div class="">Garnet</div></body></html>