tree f590b2b68aae673c1ec76dd06b7731efdf0aaf90
parent ff0ce74be84bb1300dc5790842c85ad1f3d88174
author Min-Yih Hsu <min.hsu@sifive.com> 1755195470 -0700
committer GitHub <noreply@github.com> 1755195470 -0700
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 -----END PGP SIGNATURE-----
 

[IA][RISCV] Recognizing gap masks assembled from bitwise AND (#153324)

For a deinterleaved masked.load / vp.load, if it's mask, `%c`, is
synthesized by the following snippet:
```
%m = shufflevector %s, poison, <0, 0, 0, 1, 1, 1, 2, 2, 2, 3, 3, 3>
%g = <1, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 0>
%c = and %m, %g
```
Then we can know that `%g` is the gap mask and `%s` is the mask for each
field / component. This patch teaches InterleaveAccess pass to recognize
such patterns