[m-rev.] for post-commit review: monomorphize some folds

[Zoltan Somogyi]

On Fri, 2 Dec 2022 18:40:18 +1100, Peter Wang <novalazy at gmail.com> wrote:
> Actually it broke parallel building of interface and .opt files.

What exactly do you mean by that? I bootchecked that diff
with -O5 --intermodule-optimization.

Zoltan.