[LLVMdev] some thoughts on the semantics of !fpmath

[Rafael Espíndola]

> For a transformation pass, should we do this only if the pass actually
> changed something?

In the pass manager? That is interesting. What I had in mind was just
changing the passes to only copy the metadata info they know about.
The problem is that in examples like the one Dan created. The pass
would have to delete metadata in an instruction it reasoned about but
didn't otherwise modify, which is fairly error prone.

>  -Hal

Cheers,
Rafael