scottmcm

Thanks! @bors r+ rollup

> We're inserting panics in a place they're not panic safe. Would it make sense to have these be aborts instead?

r? @scottmcm @bors r+ rollup=iffy (I think it's fine, but might want to bisect to here) @rustbot label +relnotes

I couldn't find any actual failures here, and apparently neither could @rust-log-analyzer, so @bors retry

Oh, given @CAD97's comment at the top of the file, I should probably @bors try @rust-timer queue

@bors r+ rollup=maybe

(Closing and reopening to re-trigger CI)

@bors r+

Waiting on ACP in https://github.com/rust-lang/libs-team/issues/122 -- libs-api indicated that `transpose` isn't their preferred direction, which might well affect this.

Maybe the value is more clear here for wider integers? It seems like ``` v4, v5 = iadd_cout v0, v1 v6 = iadd_cin v1, v2, v5 ``` would, in general,...