[PATCH] D53023: Prototype OpenCL BIFs using Tablegen

[Nicola Zaghen via Phabricator via cfe-commits]

Nicola added a comment.

Since this review is just for a prototype, I'll leave some feedback after having played with it for a bit.
It seems to be quite trivial to add new builtins and fix existing ones (conversion builtins sat/rounding modes). One builtin that might have a small issue is the as_type builtin in which source and destination type need to have the same bitwidth. To get that to work I ended up patching TableGen to add !mul support for it (and set VectorSize to 1 for scalars).


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