[Bug target/121343] [avr] Use hard-register constraints instead of explicit hard-regs in avr.md

[gjl at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121343

Georg-Johann Lay <gjl at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P4
                 CC|                            |stefansf at gcc dot gnu.org

--- Comment #1 from Georg-Johann Lay <gjl at gcc dot gnu.org> ---
r17-438 pulled the "sledge hammer" of rejecting insns with hard-reg constraits
in insn combine.  This means it is not a good idea (performance-wise) to use
hard-red constraints to get git of explicit hard-regs in avr.md.