ccc31278bd
Add custom lowering for `BR_JT` DAG nodes to the `brx.idx` PTX instruction ([PTX ISA 9.7.13.4. Control Flow Instructions: brx.idx] (https://docs.nvidia.com/cuda/parallel-thread-execution/#control-flow-instructions-brx-idx)). Depending on the heuristics in DAG selection, `switch` statements may now be lowered using `brx.idx`. Note: this fixes the previous issue in #102400 by adding the isBarrier attribute to BRX_END