[llvm] [RISCV] Add isel optimization for (and (sra y, c2), c1) to recover regression from #101751. (PR #104114)

[Yingwei Zheng via llvm-commits]

================
@@ -3019,6 +3040,33 @@ bool RISCVDAGToDAGISel::selectSHXADDOp(SDValue N, unsigned ShAmt,
           return true;
         }
       }
+    } else if (N0.getOpcode() == ISD::SRA && N0.hasOneUse() &&
+               isa<ConstantSDNode>(N.getOperand(1))) {
----------------
dtcxzyw wrote:

```
isa<ConstantSDNode>(N.getOperand(1)) && isa<ConstantSDNode>(N0.getOperand(1))
```

https://github.com/llvm/llvm-project/pull/104114