[PATCH] D119911: AMDGPU: Always reserve VGPR for AGPR copies on gfx908

[Stanislav Mekhanoshin via Phabricator via llvm-commits]

rampitec added a comment.

In D119911#3327691 <https://reviews.llvm.org/D119911#3327691>, @arsenm wrote:

> In D119911#3326483 <https://reviews.llvm.org/D119911#3326483>, @rampitec wrote:
>
>> What will happen to a very small kernel which could use 24 vgprs or less? Will it still use 24 vgprs and have occupancy 10?
>
> No, it will still use v32. I haven't been able to construct a testcase where this would happen that can fit in so few registers

A simple testcase is an empty kernel or a kernel loading and storing a single dword. Do you mean this will have v32 used?


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