[Bug target/84211] New: [avr] Perform a post-reload register optimization pass

[gjl at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84211

            Bug ID: 84211
           Summary: [avr] Perform a post-reload register optimization pass
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gjl at gcc dot gnu.org
  Target Milestone: ---

Created attachment 43339
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43339&action=edit
proposed patch

Some of register allocation fallout could be fixed by a target-specific
optimization pass as indicated by the patch.