[Bug target/92499] nios2 backend needs to consider allocated object size, not C object size for gprel optimization

[sandra at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92499

--- Comment #6 from sandra at gcc dot gnu.org ---
Created attachment 47346
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47346&action=edit
improved test case with global/external cases as well as local