[PATCH] D30810: Preserve vec3 type.

[Bruno Cardoso Lopes via Phabricator via cfe-commits]

bruno added a comment.

> I would like to see this patch committed. I see clear evidence of it improving existing GPU targets in the master repo as well as outside of the main tree implementations. Bruno, do you have any more concerns?

I believe the argument lacks numbers (or at least you have them but didn't mention). I didn't hear about performance results, or validation that this was actually tested for correctness. Small test cases prove a point, but can't be considered general.

OTOH, it seems like this is exactly why you want the flag, to hide any potential issues and play with it. I'm not opposed to adding the flag if there's a commitment to actually get the result and change the default to whatever seems to be better, does that seems reasonable?


https://reviews.llvm.org/D30810