[llvm-branch-commits] [llvm] AMDGPU: Add subtarget feature for global atomic fadd denormal support (PR #96443)

[Matt Arsenault via llvm-branch-commits]

arsenm wrote:

> It is worse than that. It behaves differently depending on where atomic is executed. There is no single answer if this instruction supports denorms or not.

That doesn't matter. The flat case that sometimes flushes is just a no. Flushing is never a guarantee, we only need to know a flush may happen 

https://github.com/llvm/llvm-project/pull/96443