------- Comment #11 from xuepeng dot guo at intel dot com 2008-08-12 02:11 ------- (In reply to comment #9) > The darwin -m64 failures are then the same problem, cross-jumping of noreturn > calls between different level of stack depths. > I've been wrong about DW_CFA_GNU_args_size being useless for cfa.reg != > STACK_POINTER_REGNUM, while such directives won't ever be used by the libgcc > unwinder, they might be used by debuggers to set correct value of stack > pointer, > and therefore such directives aren't useless and so we should avoid > crossjumping > in that case. Not sure how to detect that in crossjumping code though.
You are right. IMHO this is exactly the reason. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37022
