[Bug tree-optimization/67470] [5/6 Regression] ICE at -O3 on x86_64-linux-gnu in compute_live_loop_exits, at tree-ssa-loop-manip.c:235

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67470

--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Sep 15 14:10:10 2015
New Revision: 227797

URL: https://gcc.gnu.org/viewcvs?rev=227797&root=gcc&view=rev
Log:
2015-09-15  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/67470
        * tree-ssa-loop-im.c (execute_sm_if_changed): Preserve PHI
        structure for PHI hoisting by inserting a forwarder block
        if appropriate.

        * gcc.dg/torture/pr67470.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr67470.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-loop-im.c