------- Comment #9 from janis at gcc dot gnu dot org 2005-11-14 17:39 ------- A regression hunt on powerpc-linux shows that the testcase from comment #8 starts failing with this large merge from the autovect branch, within the date range that the submitter identified:
http://gcc.gnu.org/viewcvs?view=rev&rev=102356 r102356 | irar | 2005-07-25 12:05:07 +0000 (Mon, 25 Jul 2005) | 83 lines A regression hunt on powerpc-linux using the testcase from comment #2 identified this patch; the original larger testcase fails at the same place: http://gcc.gnu.org/viewcvs?view=rev&rev=88404 r88404 | rakdver | 2004-10-01 18:26:37 +0000 (Fri, 01 Oct 2004) | 9 lines * common.opt (ftree-loop-ivcanon): Enable by default. * tree-ssa-loop-ivcanon.c (try_unroll_loop_completely): Enable complete loop unrolling. (canonicalize_induction_variables, tree_unroll_loops_completely): Reset scev info. * gcc.dg/tree-ssa/loop-1.c: Check that unrolling occurs already on tree level. The reghunts used "-O2 -ftree-loop-linear". Let me know if there are other options that could be used to find earlier failures. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24309
