[Bug c++/41313] r150553 causes g++.dg/tree-prof/partition1.C compilation and execution test failures on *-apple-darwin*

["howarth at nitro dot med dot uc dot edu" <gcc-bugzilla at gcc dot gnu dot org>]

------- 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?


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41313