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| author | Max Graey <maxgraey@gmail.com> | 2021-08-02 16:30:26 +0300 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2021-08-02 13:30:26 +0000 |
| commit | f35f02c1ce1b3129aa83d2dddeababd414c1ca8f (patch) | |
| tree | 52b70c4193f77d63615f6571458248cf055c62a8 /src/passes/LocalSubtyping.cpp | |
| parent | 512033eed52fff82274650aca7d7374b4b305551 (diff) | |
| download | binaryen-f35f02c1ce1b3129aa83d2dddeababd414c1ca8f.tar.gz binaryen-f35f02c1ce1b3129aa83d2dddeababd414c1ca8f.tar.bz2 binaryen-f35f02c1ce1b3129aa83d2dddeababd414c1ca8f.zip | |
[JS] Add a new OptimizeForJS pass (#4033)
Add a new OptimizeForJS pass which contains rewriting rules specific to JavaScript.
LLVM usually lowers x != 0 && (x & (x - 1)) == 0 (isPowerOf2) to popcnt(x) == 1 which is ok for wasm and other targets but is quite expensive for JavaScript. In this PR we lower the popcnt pattern back to the isPowerOf2 pattern.
Diffstat (limited to 'src/passes/LocalSubtyping.cpp')
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