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Hello I'm implementing stack copying coroutines. It's an interesting challenge. When we use setjmp/longjmp to move between stacks, we must make sure that restoring the stack doesn't blow away the current stack frame before calling longjmp. To do that, we check how big the stack we are restoring is, and use alloca to push the current stack frame beyond that. It works but when I add

...nd interestingly, Linux went to the trouble of removing them all ( https://www.phoronix.com/scan.php?page=news_item&px=Linux-Kills-The-VLA ) -- Jorg -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20190713/e3284702/attachment.html>