[Bug tree-optimization/50213] [4.6/4.7 Regression] Regression in space-optimized code relative to 4.5.x

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50213

--- Comment #7 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-09-07 11:28:43 UTC ---
Author: rguenth
Date: Wed Sep  7 11:28:39 2011
New Revision: 178633

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=178633
Log:
2011-09-07  Richard Guenther  <rguenther@suse.de>

    PR tree-optimization/50213
    * tree-flow.h (simple_iv_increment_p): Declare.
    * tree-ssa-dom.c (simple_iv_increment_p): Export.  Also handle
    POINTER_PLUS_EXPR.
    * tree-ssa-forwprop.c (ssa_forward_propagate_and_combine): Do
    not propagate simple IV counter increments.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/tree-flow.h
    trunk/gcc/tree-ssa-dom.c
    trunk/gcc/tree-ssa-forwprop.c