[Bug target/79430] [7/8 Regression] action of statement incorrectly optimised away

[tkoenig at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79430

--- Comment #81 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #79)
> Created attachment 41269 [details]
> gcc7-pr79430.patch
> 
> Untested patch meant for 7.x, which just modifies reg-stack.c and nothing
> else.
> Unlike the above patch which seems to affect also scheduling a lot, this one
> doesn't.

Looks good, the test passes now.