Is there any idiom to indicate that branches are uniform?

I’m looking at the code generated by a switch statement with a dozen sequential cases (0-11) and the PTX shows it’s implemented by splitting the case space in half with multiple comparisons. The switch argument is uniform across the warp.

That’s OK.

However, the PTX also reveals the comparison branches aren’t uniform and I’m wondering if there is any idiom that I can use to help communicate to the compiler that the switch argument and all its cases are uniform across the warp?

P.S. I understand that the non-uniform BRA is already a fast instruction.