------- Comment #36 from pinskia at gcc dot gnu dot org 2009-01-21 03:28 ------- (In reply to comment #35) > (In reply to comment #34) > > C standard guarantees that automatic variable only with volatile will be > > restored after longjmp. Gcc puts volatiles on stack and don't use pseudos > > for > > them. So they will be never shared on stack. > > > > I think the code (its expected behavior) does not conform with the standard. > > > > Unfortunately there are a lot of code which does not conform with the > > standard. > > So I think we should provide the same functionality. It can be done by > > prohibiting stack slot sharing in IRA if there are setjmps in the function. > > > > Does C standard say anything about function argument? "system", which > is a function argument, is trashed here.
function arguments are just local variables .... -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38587
