[PATCH] D151449: [RISCV] Add DAG combine for CTTZ in the case of input 0

[Djordje Todorovic via Phabricator via llvm-commits]

djtodoro updated this revision to Diff 526412.
djtodoro edited the summary of this revision.
djtodoro added a comment.

- Change/improve the summary
- Improve the code
- Reduce the test


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D151449/new/

https://reviews.llvm.org/D151449

Files:
  llvm/lib/Target/RISCV/RISCVISelLowering.cpp
  llvm/test/CodeGen/RISCV/cttz_zero_return_test.ll

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