As mentioned in
http://gcc.gnu.org/ml/gcc-patches/2010-06/msg00115.html
for -O0 we sometimes, e.g. for return without value or for C++ NRV optimized
return don't emit any insns with the location of the return stmt, which results
in worse debug experience.


-- 
           Summary: goto_locus lost at -O0 during cfg cleanup
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: debug
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jakub at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44375

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