[llvm] [RISCV] Select (and (srl x, c2), c1) as (srli (srai x, c2-c3)). (PR #101868)

[Yingwei Zheng via llvm-commits]

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@@ -1449,6 +1449,31 @@ void RISCVDAGToDAGISel::Select(SDNode *Node) {
       }
     }
 
+    // Turn (and (srl x, c2), c1) -> (srli (srai x, c2-c3)) if c1 is a mask with
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dtcxzyw wrote:

```suggestion
    // Turn (and (sra x, c2), c1) -> (srli (srai x, c2-c3), c3) if c1 is a mask with
```

https://github.com/llvm/llvm-project/pull/101868