[Bug tree-optimization/68625] [6 Regression] Segmentation fault in useless_type_conversion_p

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68625

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Dec  2 09:47:43 2015
New Revision: 231162

URL: https://gcc.gnu.org/viewcvs?rev=231162&root=gcc&view=rev
Log:
2015-12-02  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/68625
        * tree-cfgcleanup.c (cleanup_tree_cfg_bb): Do not call
        cleanup_control_flow_bb.
        (cleanup_tree_cfg_1): First perform cleanup_control_flow_bb
        on all BBs, then cleanup_tree_cfg_bb and finally iterate
        over the worklist doing both.

        * gcc.dg/torture/pr68625.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr68625.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-cfgcleanup.c