[PATCH] D122850: [AMDGPU] Fix regression with vectorization limiting

[Stanislav Mekhanoshin via Phabricator via llvm-commits]

rampitec added a comment.

Note that 4 was the most common return value before the regression. Optimistically we assume max occupancy which means 24 vgprs on most targets. Return value was max available vgprs / 8, i.e. 4. Exceptions were an implicit request of the maximum occupancy, a rare thing, and Navi with different vgpr to occupancy mappings.


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