llvm-project

f8ee58a3 - [RISCV] Initial codegen support for the XRivosVizip extension (#131933)

[RISCV] Initial codegen support for the XRivosVizip extension (#131933) This implements initial code generation support for a subset of the xrivosvizip extension. Specifically, this adds support for vzipeven, vzipodd, and vzip2a, but not vzip2b, vunzip2a, or vunzip2b. The others will follow in separate patches. One review note: The zipeven/zipodd matchers were recently rewritten to better match upstream style, so careful review there would be appreciated. The matchers don't yet support type coercion to wider types. This will be done in a future patch.