http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50063
--- Comment #15 from Georg-Johann Lay <gjl at gcc dot gnu.org> 2011-12-19 23:24:13 UTC --- (In reply to comment #14) > Well, it is certainly desirable not to process the prologue insns during > init_alias_analysis. The fact that stack pointer has the same value as frame > pointer after the prologue is not usual and something the generic code isn't > prepared for. So bottom line is that GCC is not ready for AVR? > So you need to tell the alias analysis about that, as the prologue isn't > scanned, it is the backend responsibility to tell that. Ya, I skimmed the hooks once again... What hook needs to be implemented/adjusted by AVR backend to ship that information if prologue and elimination information is not enough already...?
