[PATCH] D76199: GlobalISel: Fix round lowering

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added a comment.

In D76199#1924416 <https://reviews.llvm.org/D76199#1924416>, @foad wrote:

> Looks OK technically. Why is it useful to lower round and floor in terms of trunc? Is trunc somehow more primitive, or more commonly legal? Does the AMDGPU backend use any of this?


We need the round lowering. I think the floor lowering is now dead in the DAG path (but R600 might need it for f64 if that were ever implemented)


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https://reviews.llvm.org/D76199