[PATCH] D128163: [Coroutines] Don't add musttail call if WebAssembly are enabled

[Thomas Lively via Phabricator via llvm-commits]

tlively added a comment.

I think it would make sense to add a new method to TTI for this, since hardcoding an exception for Wasm is not going to be future-proof at all. The `tail-call` target feature, while not standard yet, is very close to being standardized and shipped in browsers. It's already available behind a flag in Chrome and Node. Also, if possible, it would be good to perform a different transformation that can still do symmetric transfer without tail calls if the prevailing view is that symmetric transfer is guaranteed by the spec (but simply omitting musttail for now seems like a reasonable stopgap measure).


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  https://reviews.llvm.org/D128163/new/

https://reviews.llvm.org/D128163