Martin Mares <mj@ucw.cz> wrote on 2010/04/30 15:25:20:
From: Martin Mares <mj@ucw.cz> To: Joakim Tjernlund <joakim.tjernlund@transmode.se> Cc: bird-users@trubka.network.cz, Ondrej Zajicek <santiago@crfreenet.org> Date: 2010/04/30 15:25 Subject: Re: Xtonlsab bug
Hello!
hmm, why bomb out when not needed?
It does not matter. It must not occur in production versions either, it should exist only as a warning for developers during testing.
FYI: struct my_struct { long a100[100]; }; static inline func(struct my_struct *h1, struct my_struct *h2) { *h1 = *h2; } mytest(struct my_struct *my_h1) { func(my_h1, my_h1); } uses memcpy on ppc: mytest: mflr 0 stwu 1,-16(1) mr 4,3 li 5,400 stw 0,20(1) bl memcpy lwz 0,20(1) addi 1,1,16 mtlr 0 blr Pehaps this it is always safe to use memcpy in this case, but the man page doesn't. It is also a waste of cycles as the whole op is a NOP. Jocke