[PATCH] D89170: [AMDGPU] Select flat scratch instructions where available

[Stanislav Mekhanoshin via Phabricator via llvm-commits]

rampitec added a comment.

In D89170#2332955 <https://reviews.llvm.org/D89170#2332955>, @arsenm wrote:

> This will change the ABI, so I don't think belongs as a subtarget property

The ABI will in fact depend on the subtarget. We can only use it starting from gfx9, and then even on gfx9 it might not be desirable. GFX10 is better in this respect.
Anyway, I need a subtarget to decide if we even have flat scratch instructions. So far this switch is experimental, but if you have an idea of a better placement please tell.


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https://reviews.llvm.org/D89170