[Bug rtl-optimization/56965] nonoverlapping_component_refs_p is bogus and slow

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56965

--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Apr 15 16:04:11 2014
New Revision: 209423

URL: http://gcc.gnu.org/viewcvs?rev=209423&root=gcc&view=rev
Log:
2014-04-15  Richard Biener  <rguenther@suse.de>

    PR rtl-optimization/56965
    * alias.c (ncr_compar, nonoverlapping_component_refs_p): Move ...
    * tree-ssa-alias.c (ncr_compar, nonoverlapping_component_refs_p):
    ... here.
    * alias.c (true_dependence_1): Do not call
    nonoverlapping_component_refs_p.
    * tree-ssa-alias.c (indirect_ref_may_alias_decl_p): Call
    nonoverlapping_component_refs_p.
    (indirect_refs_may_alias_p): Likewise.

    * gcc.dg/torture/pr56965-1.c: New testcase.
    * gcc.dg/torture/pr56965-2.c: Likewise.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr56965-1.c
    trunk/gcc/testsuite/gcc.dg/torture/pr56965-2.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/alias.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-alias.c