I decided to look into sixtrack and noticed this. I will add a small testcase after I reduce the problem.
-- Summary: Complex types are not SRA all the time. Product: gcc Version: 4.0.0 Status: UNCONFIRMED Keywords: missed-optimization Severity: minor 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 GCC target triplet: powerpc-darwin http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19042