I believe there is an off-by-one typo in the examples for -floop-strip-mine and -floop-block, see the attached patch.
-- Summary: typo in the example for -floop-strip-mine Product: gcc Version: unknown Status: UNCONFIRMED Severity: trivial Priority: P3 Component: tree-optimization AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: kasal at ucw dot cz http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37690