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| author | Craig Topper <craig.topper@sifive.com> | 2024-04-29 10:15:57 -0700 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2024-04-29 10:15:57 -0700 |
| commit | f9d4d54aa0cb6fbeee1e8744b379b1eac59c3afc (patch) | |
| tree | d1f50b89192243917fd4afe92bbc7c7f542971c8 /llvm/lib/Bitcode/Reader/BitcodeReader.cpp | |
| parent | 618adc762e95b33576c42be8912bb48dd0fdff94 (diff) | |
| download | llvm-f9d4d54aa0cb6fbeee1e8744b379b1eac59c3afc.zip llvm-f9d4d54aa0cb6fbeee1e8744b379b1eac59c3afc.tar.gz llvm-f9d4d54aa0cb6fbeee1e8744b379b1eac59c3afc.tar.bz2 | |
[RISCV] Break the (czero_eqz x, (setne x, 0)) -> x combine into 2 combines. (#90428)
We can think of this as two separate combines
(czero_eqz x, (setne y, 0)) -> (czero_eqz x, y)
and
(czero_eqz x, x) -> x
Similary the (czero_nez x, (seteq x, 0)) -> x combine can be broken into
(czero_nez x, (seteq y, 0)) -> (czero_eqz x, y)
and
(czero_eqz x, x) -> x
isel already does the (czero_eqz x, (setne y, 0)) -> (czero_eqz x, y)
and (czero_nez x, (seteq y, 0)) -> (czero_eqz x, y) combines, but doing
them early could expose other opportunities.
Diffstat (limited to 'llvm/lib/Bitcode/Reader/BitcodeReader.cpp')
0 files changed, 0 insertions, 0 deletions