[clang] [CIR] Add rotate operation (PR #148426)

[Henrich Lauko via cfe-commits]

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@@ -2898,6 +2898,45 @@ def ByteSwapOp : CIR_BitOpBase<"byte_swap", CIR_UIntOfWidths<[16, 32, 64]>> {
   }];
 }
 
+//===----------------------------------------------------------------------===//
+// RotateOp
+//===----------------------------------------------------------------------===//
+
+def RotateOp : CIR_Op<"rotate", [Pure, SameOperandsAndResultType]> {
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xlauko wrote:

```suggestion
def CIR_RotateOp : CIR_Op<"rotate", [Pure, SameOperandsAndResultType]> {
```
To mirror changes from https://github.com/llvm/clangir/pull/1741

https://github.com/llvm/llvm-project/pull/148426