[PATCH] D48126: AMDGPU: Add combine for short vector extract_vector_elts

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
arsenm added reviewers: rampitec, cfang.
Herald added subscribers: t-tye, tpr, dstuttard, yaxunl, nhaehnle, wdng, kzhuravl.

Try to access pieces 4 bytes at a time. This helps
various hasOneUse extract_vector_elt combines, such
as load width reductions.

      

Avoids test regressions in a future commit.


https://reviews.llvm.org/D48126

Files:
  lib/Target/AMDGPU/SIISelLowering.cpp
  test/CodeGen/AMDGPU/extract_vector_elt-f16.ll
  test/CodeGen/AMDGPU/extract_vector_elt-i16.ll
  test/CodeGen/AMDGPU/extract_vector_elt-i8.ll

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