With the following C++ code we get a fold checking failure on the 4.0 branch at least: int __finite (double __x) throw () { return (__extension__ (((((union { double __d; int __i[2]; }) {__d: __x}).__i[1] | 0x800fffffu) + 1) >> 31)); } }
-- Summary: fold checking failure Product: gcc Version: 4.1.0 Status: UNCONFIRMED Keywords: ice-on-valid-code Severity: normal Priority: P2 Component: tree-optimization 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=20931