On 27/01/2012 17:01, Andrew Haley wrote: > On 01/27/2012 04:46 PM, Andreas Krebbel wrote:
>> Starting with this IRA patch: >> http://gcc.gnu.org/ml/gcc-patches/2011-10/msg00028.html >> __divdi3 does *not* need a stack frame at all. >> >> So the CFAs of __divdi3 and probe_1 are the same! > > I'm confused. > > But __divdi3 should have been compiled with enough unwinder data > that it can be found; it should not matter whether __divdi3 has > a stack frame or not. > > So why doesn't __divdi3 have a CFA of its own? Unless I've misunderstood, it's because the CFA *is* the stack frame (base?) pointer. cheers, DaveK
