Hi, I'm trying to optimize our target ABI, and I'm wondering what is the best strategy to define it. Is there a paper, or any hint, dealing with this topic ? For instance, - which ratio between call-used-reg vs "static regs" - which ratio between arg regs vs call-used-reg - what should be return regs - ... I guess this problem is very target dependent, but there are maybe general ideas about this. In particular, for now my call-used regs set is the same that arg regs set. I noticed GCC would not use arg regs for reloading, (or would prefer others), even if they are not actually used by function args. and it generates extra push/pop of static regs. I there a way force gcc preferring using "free" arg regs ? Thank you by advance! Aurélien
