[Bug middle-end/54520] [4.8 Regression] ice in merge_latch_edges with -O3

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54520

--- Comment #4 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-09-10 14:10:14 UTC ---
Author: rguenth
Date: Mon Sep 10 14:10:09 2012
New Revision: 191141

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=191141
Log:
2012-09-10  Richard Guenther  <rguenther@suse.de>

    PR tree-optimization/54520
    * tree-ssa-threadupdate.c (def_split_header_continue_p):
    Properly consider sub-loops.

    * gcc.dg/torture/pr54520.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr54520.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-threadupdate.c