Since end of May, quite a few libstdc++-v3 testcases, stressing atomicity.h are failing on multi-processor ia64 machines. See, for instance, in:
http://gcc.gnu.org/ml/gcc-testresults/2005-11/msg00411.html FAIL: 22_locale/locale/cons/12658_thread-1.cc execution test FAIL: 22_locale/locale/cons/12658_thread-2.cc execution test Those tests *never* fail in 4_0-branch, which doesn't use the builtins, and never did in mainline before the below of mine (and a simultaneous one to the compiler, which emptied ia64intrin.h) 2005-05-25 Paolo Carlini <[EMAIL PROTECTED]> * config/cpu/ia64/atomicity.h: Do not include ia64intrin.h. My analysis is that __sync_fetch_and_add is somehow misbehaving on ia64. I will try to investigate further the actual assembly, but I don't make promises, sorry. -- Summary: __sync_fetch_and_add on ia64 Product: gcc Version: 4.1.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: other AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: pcarlini at suse dot de http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24757
