[llvm] [RISCV] Support swapped select operands in combineTruncSelectToSMaxUSat. (PR #226584)

[Craig Topper via llvm-commits]

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topperc wrote:

This pattern is in 525.x264_r today. I didn't check how hot it is. I wrote the original version for 525.x264_r as well, I don't know if some canonicalization changed.

https://github.com/llvm/llvm-project/pull/226584