https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79526
Bug ID: 79526 Summary: loop-9.c fails on s390 + s390x Product: gcc Version: 6.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: target Assignee: unassigned at gcc dot gnu.org Reporter: vogt at linux dot vnet.ibm.com Target Milestone: --- Some discussion on that issue is here. https://gcc.gnu.org/ml/gcc/2015-12/msg00064.html This should be fixed in the backend at some point in the future.