[Bug middle-end/59125] [4.8/4.9 Regression] gcc triggers wrong strncpy_chk

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59125

--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Nov 18 15:25:05 2013
New Revision: 204966

URL: http://gcc.gnu.org/viewcvs?rev=204966&root=gcc&view=rev
Log:
2013-11-18  Richard Biener  <rguenther@suse.de>

    PR tree-optimization/59125
    PR tree-optimization/54570
    * tree-ssa-sccvn.c (copy_reference_ops_from_ref): When inlining
    is not complete do not treat component-references with offset zero
    but different fields as equal.
    * tree-object-size.c: Include tree-phinodes.h and ssa-iterators.h.
    (compute_object_sizes): Apply TLC.  Propagate the constant
    results into all uses and fold their stmts.
    * passes.def (pass_all_optimizations): Move pass_object_sizes
    after the first pass_forwprop and before pass_fre.

    * gcc.dg/builtin-object-size-8.c: Un-xfail.
    * gcc.dg/builtin-object-size-14.c: New testcase.
    * gcc.dg/strlenopt-14gf.c: Adjust.
    * gcc.dg/strlenopt-1f.c: Likewise.
    * gcc.dg/strlenopt-4gf.c: Likewise.

Added:
    trunk/gcc/testsuite/gcc.dg/builtin-object-size-14.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/passes.def
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.dg/builtin-object-size-8.c
    trunk/gcc/testsuite/gcc.dg/strlenopt-14gf.c
    trunk/gcc/testsuite/gcc.dg/strlenopt-1f.c
    trunk/gcc/testsuite/gcc.dg/strlenopt-4gf.c
    trunk/gcc/tree-object-size.c
    trunk/gcc/tree-ssa-sccvn.c