[Bug c/87615] Possible excessive compile time with -O2

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87615

--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Btw, compiles in 8s with -O1 which is what we suggest for machine-generated
code like this.