[Bug fortran/79930] Potentially Missed Optimisation for MATMUL / DOT_PRODUCT

[adam at aphirst dot karoo.co.uk]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79930

--- Comment #3 from Adam Hirst <adam at aphirst dot karoo.co.uk> ---
Created attachment 40898
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=40898&action=edit
Implementation using dimension(3) member