[PATCH] D94648: [amdgpu] Implement lower function LDS pass

[Tony Tye via Phabricator via llvm-commits]

t-tye added a comment.

> I suspect there is something in hardware that rounds LDS allocation up to a boundary, so as long as the kernel looks like it uses some non-zero amount of LDS, the out of bounds read hits in the allocated region.

Yes the LDS size is rounded up as described in the GRANULATED_LDS_SIZE field in the compute_pgm_rsrc2 table at:

https://llvm.org/docs/AMDGPUUsage.html#amdgpu-amdhsa-compute-pgm-rsrc2-gfx6-gfx10-table


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D94648/new/

https://reviews.llvm.org/D94648