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

[Henrich Lauko via cfe-commits]

================
@@ -872,6 +872,21 @@ mlir::LogicalResult CIRToLLVMReturnOpLowering::matchAndRewrite(
   return mlir::LogicalResult::success();
 }
 
+mlir::LogicalResult CIRToLLVMRotateOpLowering::matchAndRewrite(
+    cir::RotateOp op, OpAdaptor adaptor,
+    mlir::ConversionPatternRewriter &rewriter) const {
+  // Note that LLVM intrinsic calls to @llvm.fsh{r,l}.i* have the same type as
+  // the operand.
+  auto input = adaptor.getInput();
+  if (op.getIsRotateLeft())
----------------
xlauko wrote:

```suggestion
  if (op.isRotateLeft())
```

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