[Bug tree-optimization/55684] [4.8 Regression] ICE in remove_redundant_iv_tests, at tree-ssa-loop-ivcanon.c:559

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55684

--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> 2012-12-14 13:35:09 UTC ---
Author: rguenth
Date: Fri Dec 14 13:35:03 2012
New Revision: 194499

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=194499
Log:
2012-12-14  Richard Biener  <rguenther@suse.de>

    PR tree-optimization/55684
    * tree-ssa-loop-ivcanon.c (remove_redundant_iv_tests): Handle
    gracefully the case where we cannot compute the number of
    iterations at an exit.

    * gcc.dg/torture/pr55684.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr55684.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-loop-ivcanon.c