[PATCH] D142782: [AMDGPU] WIP: Add basic support for extended i8 perm matching

[Jeffrey Byrnes via Phabricator via llvm-commits]

jrbyrnes updated this revision to Diff 493435.
jrbyrnes added a comment.
Herald added a subscriber: ecnelises.

Blacklist or->perm combine for certain users of or. Some ops (e.g. V_CVT_F32_UBYTE) are performed in bytewise manner. If the or has such a user, it is better to leave the dag in uncombined state since we will need to byte extract the combine.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D142782/new/

https://reviews.llvm.org/D142782

Files:
  llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  llvm/lib/Target/AMDGPU/SIISelLowering.cpp
  llvm/test/CodeGen/AMDGPU/combine-vload-extract.ll
  llvm/test/CodeGen/AMDGPU/cvt_f32_ubyte.ll
  llvm/test/CodeGen/AMDGPU/ds_read2.ll
  llvm/test/CodeGen/AMDGPU/fast-unaligned-load-store.global.ll
  llvm/test/CodeGen/AMDGPU/fast-unaligned-load-store.private.ll
  llvm/test/CodeGen/AMDGPU/insert_vector_elt.v2i16.ll
  llvm/test/CodeGen/AMDGPU/load-hi16.ll
  llvm/test/CodeGen/AMDGPU/load-lo16.ll
  llvm/test/CodeGen/AMDGPU/load-local.128.ll
  llvm/test/CodeGen/AMDGPU/load-local.96.ll
  llvm/test/CodeGen/AMDGPU/pack.v2f16.ll
  llvm/test/CodeGen/AMDGPU/pack.v2i16.ll
  llvm/test/CodeGen/AMDGPU/permute.ll
  llvm/test/CodeGen/AMDGPU/permute_i8.ll

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