https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66313
--- Comment #20 from Dmitry Babokin <babokin at gmail dot com> --- I've created #80932 for c1*(c2*v1-c3*v2)=>c1*c2*v1-c1*c3*v2 issue. --- Comment #21 from Dmitry Babokin <babokin at gmail dot com> --- I've created #80932 for c1*(c2*v1-c3*v2)=>c1*c2*v1-c1*c3*v2 issue.