[Bug tree-optimization/68013] [6 Regression] ICE on valid code at -O2 on x86_64-linux-gnu in duplicate_thread_path, at tree-ssa-threadupdate.c:2469

[law at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68013

--- Comment #2 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Mon Oct 26 15:36:04 2015
New Revision: 229375

URL: https://gcc.gnu.org/viewcvs?rev=229375&root=gcc&view=rev
Log:
[PATCH] [PR tree-optimization/68013] Make sure first block in FSM path
is in VISITED_BBs

        PR tree-optimization/68013
        * tree-ssa-threadbackward.c
        (fsm_find_control_statement_thread_paths): Make sure the first block
        in the path is in VISITED_BBs.

        PR tree-optimization/68013
        * gcc.c-torture/compile/pr68013.c: New test.

Added:
    trunk/gcc/testsuite/gcc.c-torture/compile/pr68013.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-threadbackward.c