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On Jan 22, 2020, at 19:49, Philip Reames <listmail@philipreames.com> wrote:

In short, I hit a major stumbling block. I hadn't account for the fact that some atomic stores dependent on element type (float vs int for instance) for legality.

I think this qualifies as a target/infrastructure bug. It should always be legal to cast the FP atomic load/store to integer. This distinction isn’t possible in GlobalISel, so it makes sense to move away from this being a situation to deal with.

-Matt