+1 thanks for the correction, should have verified this. Last time I used ISPC it was using an extremely outdated LLVM version (5) or so, and it took years to move it to LLVM 7. I wasn't aware that they have been slowly migrating to newer LLVM versions.
https://github.com/freebsd/freebsd-ports/blob/85cccf4f15c42d...
But hopefully that will be fixed soon.