optimiser generates SSE instructions that add 32 bit quantities when the field being referenced is actually 21 bits wide. This disables the possibility of testing the overflow of the additions.
-- Summary: optimiser destroys possibility of detecting overflow Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P3 Component: c AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: geoff at dyalog dot com GCC build triplet: x86_64-linux-gnu GCC host triplet: x86_64-linux-gnu GCC target triplet: x86_64-linux-gnu http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44376