[PATCH] D71014: [AArc64][SVE] Fold constant multiply of element count

[Cullen Rhodes via Phabricator via llvm-commits]

c-rhodes created this revision.
c-rhodes added reviewers: sdesmalen, huntergr, dancgr, rengolin, efriedma.
Herald added subscribers: psnobl, rkruppe, hiraditya, kristof.beyls, tschuett.
Herald added a project: LLVM.
c-rhodes added a parent revision: D70967: [AArch64][SVE] Implement element count intrinsics.

E.g.

  %0 = tail call i64 @llvm.aarch64.sve.cntw(i32 31)
  %mul = mul i64 %0, <const>

Should emit:

  cntw    x0, all, mul #<const>

For <const> in the range 1-16.

Patch by Kerry McLaughlin


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D71014

Files:
  llvm/lib/Target/AArch64/AArch64ISelDAGToDAG.cpp
  llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
  llvm/lib/Target/AArch64/SVEInstrFormats.td
  llvm/test/CodeGen/AArch64/sve-intrinsics-counting-elems.ll

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