http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58577
Bug ID: 58577 Summary: Capacita regresses with 202619 Product: gcc Version: 4.9.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: rtl-optimization Assignee: unassigned at gcc dot gnu.org Reporter: Ganesh.Gopalasubramanian at amd dot com CC: rguenther at suse dot de capactia from pb11 (polyhedron) regresses with revision 202619. The opensuse polyhedron runs shows this. (REF:http://gcc.opensuse.org/c++bench/polyhedron/polyhedron-summary.txt) 130916.99962 7.01 15.45 74.94 40.86 8.82 16.19 4.89 99.45 130917.86399 7.76 15.45 44.48 -1.00 9.09 16.16 4.97 10805.10 Execution log shows a string of NaNs <snip before commit> Calculating G Transforming G Starting Bi-CGSTAB, for accuracy 1e-6, N= 1048576 |r|/|y| = 9.09707323E-02 |r|/|y| = 9.78626590E-03 |r|/|y| = 7.68897077E-03 |r|/|y| = 1.48448779E-03 |r|/|y| = 2.01700241E-04 </snip> Capacita run built with GCC49 trunk gives out the following output. <snip after commit> Calculating G Transforming G Starting Bi-CGSTAB, for accuracy 1e-6, N= 1048576 |r|/|y| = NaN |r|/|y| = NaN |r|/|y| = NaN |r|/|y| = NaN |r|/|y| = NaN </snip>