| Issue |
131734
|
| Summary |
AMDGPU should handle SimplifyDemandedVectorElts for more trivial intrinsics
|
| Labels |
good first issue,
backend:AMDGPU,
missed-optimization
|
| Assignees |
|
| Reporter |
arsenm
|
As a follow up to https://github.com/llvm/llvm-project/pull/128647, more intrinsics should be handled in SimplifyDemandedVectorElts.
This includes: Intrinsic::amdgcn_readlane, Intrinsic::amdgcn_update_dpp, Intrinsic::amdgcn_permlane16, Intrinsic::amdgcn_permlanex16, Intrinsic::amdgcn_permlane64 and Intrinsic::amdgcn_mov_dpp8
This is mostly a matter of adding the intrinsics to the switch, some boilerplate to keep the other immediate operands as they are, and adding tests similar to the ones added in #128647
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