[Bug tree-optimization/60485] field-sensitive points-to confused by pointer offsetting

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60485

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Mar 17 13:08:41 2014
New Revision: 208615

URL: http://gcc.gnu.org/viewcvs?rev=208615&root=gcc&view=rev
Log:
2014-03-17  Richard Biener  <rguenther@suse.de>

    Backport from mainline
    2014-03-11  Richard Biener  <rguenther@suse.de>

    PR tree-optimization/60429
    PR tree-optimization/60485
    * tree-ssa-structalias.c (set_union_with_increment): Properly
    take into account all fields that overlap the shifted vars.
    (do_sd_constraint): Likewise.
    (do_ds_constraint): Likewise.
    (get_constraint_for_ptr_offset): Likewise.

    * gcc.dg/pr60485-1.c: New testcase.
    * gcc.dg/pr60485-2.c: Likewise.

Added:
    branches/gcc-4_8-branch/gcc/testsuite/gcc.dg/pr60485-1.c
    branches/gcc-4_8-branch/gcc/testsuite/gcc.dg/pr60485-2.c
Modified:
    branches/gcc-4_8-branch/gcc/ChangeLog
    branches/gcc-4_8-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_8-branch/gcc/tree-ssa-structalias.c