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| author | Liao Chunyu <chunyu@iscas.ac.cn> | 2023-11-21 13:43:34 +0800 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2023-11-21 13:43:34 +0800 |
| commit | 9166cd2a71ba81d2c9c68f80371b1397943a813b (patch) | |
| tree | ad1122fcf98826927c08cee62d6aa36d5f282e0a /llvm/lib/CodeGen/MachineBlockPlacement.cpp | |
| parent | d84834a695ed848f47b721c1b7f75f2ef25fb4e0 (diff) | |
| download | llvm-9166cd2a71ba81d2c9c68f80371b1397943a813b.zip llvm-9166cd2a71ba81d2c9c68f80371b1397943a813b.tar.gz llvm-9166cd2a71ba81d2c9c68f80371b1397943a813b.tar.bz2 | |
[RISCV] DAG combine (mul (add x, 1), y) -> vmadd (#71495)
vmadd: (mul (add x, 1), y) -> (add (mul x, y), y)
(mul x, add (y, 1)) -> (add x, (mul x, y))
vnmsub: (mul (sub 1, x), y) -> (sub y, (mul x, y))
(mul x, (sub 1, y)) -> (sub x, (mul x, y))
Comparison with gcc:
vmadd: https://gcc.godbolt.org/z/xjePx87Y7
vnsub: https://gcc.godbolt.org/z/b17zG7nT1
Diffstat (limited to 'llvm/lib/CodeGen/MachineBlockPlacement.cpp')
0 files changed, 0 insertions, 0 deletions