This is the new bug for PR 19405. Keeping track of that we no longer constant fold long doubles in the IBM 128bit long double format.
-- Summary: IBM 128bit long double format is not constant foldded. Product: gcc Version: 4.0.0 Status: UNCONFIRMED Keywords: missed-optimization Severity: enhancement Priority: P2 Component: middle-end AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: pinskia at gcc dot gnu dot org CC: gcc-bugs at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19779