Craig Topper 38007dd394 [RISCV] Promote i1 shuffles to i8 shuffles. ...

Otherwise I think we extract and use a build_vector. There may be
some more improvements that can be made and there might be some
cases that we should do something different for, but this seemed like a
decent starting point.

Reviewed By: luke

Differential Revision: https://reviews.llvm.org/D149724

2023-05-04 19:44:43 -07:00

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