------- Comment #31 from howarth at nitro dot med dot uc dot edu 2009-10-05
18:05 -------
(In reply to comment #12)
> It is unclear what those labels are good for, but if darwin is to support
> hot/cold partitioning and FDEs covering it, the emit unwind_label hook (which
> is apparently darwin specific only) should be passed also the SECOND variable
> and create different label name for the second FDE for the same function (if
> function starts in hot section, then the second one is covering the cold
> section, and vice versa).
> The patch in #c11 would just mean you'd keep older versions broken.
>
Jakub,
Do you mean that we need to pass 'second' from gcc/ira-int.h?
/* Allocnos connected by the copy. The first allocno should have
smaller order number than the second one. */
ira_allocno_t first, second;
to darwin_emit_unwind_label()? Also, what would we use to detect whether the
first and second FDE's came from hot or cold sections?
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41313
