[PATCH] D158853: [SDAG] Add SimplifyDemandedBits support for ISD::SPLAT_VECTOR_PARTS

[Craig Topper via Phabricator via llvm-commits]

craig.topper added inline comments.


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Comment at: llvm/test/CodeGen/RISCV/rvv/vnsrl-sdnode.ll:644
   %splat = shufflevector <vscale x 1 x i64> %head, <vscale x 1 x i64> poison, <vscale x 1 x i32> zeroinitializer
   %vb = trunc <vscale x 1 x i64> %splat to <vscale x 1 x i32>
   %x = lshr <vscale x 1 x i32> %va, %vb
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This looks like what we really have is a missing combine on trunc of splat_vector.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D158853/new/

https://reviews.llvm.org/D158853