[PATCH] D111904: [RISCV] Lower fixed vector CTLZ_ZERO_UNDEF/CTTZ_ZERO_UNDEF by converting to FP and extracting the exponent.

[Craig Topper via Phabricator via llvm-commits]

craig.topper updated this revision to Diff 380999.
craig.topper added a comment.

Remove splitting if FP type isn't legal. Some cases it generated worse code. Need to re-evaluate.

I had to make an additional change to TargetLowering.cpp to prevent an infinite loop.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D111904/new/

https://reviews.llvm.org/D111904

Files:
  llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
  llvm/lib/Target/RISCV/RISCVISelLowering.cpp
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-ctlz.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-cttz.ll

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