[clang] [OpenACC] Sema changes for +*&|^ reduction combiner recipes (PR #162740)

[Thurston Dang via cfe-commits]

thurstond wrote:

> Though I've got no clue with that error message... You wouldn't happen to have seen something like that in the past, would you?

I haven't seen it before.

I'll try to spin up a bot and see if there's more output.

https://github.com/llvm/llvm-project/pull/162740