[PATCH] D72845: AMDGPU: Do permlane16 vdst_in discard optimization in InstCombine

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
arsenm added reviewers: rampitec, vpykhtin.
Herald added subscribers: kerbowa, hiraditya, t-tye, tpr, dstuttard, yaxunl, nhaehnle, wdng, jvesely, kzhuravl.
Herald added a project: LLVM.

There's more potential value to discarding the source value earlier,
since we always know the value of the fi/bc bits.


https://reviews.llvm.org/D72845

Files:
  llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp
  llvm/test/Transforms/InstCombine/AMDGPU/amdgcn-intrinsics.ll

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