[Bug tree-optimization/49749] Reassociation rank algorithm does not include all non-NULL operands

[wschmidt at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49749

--- Comment #14 from William J. Schmidt <wschmidt at gcc dot gnu.org> 
2011-07-21 20:27:21 UTC ---
Author: wschmidt
Date: Thu Jul 21 20:27:17 2011
New Revision: 176585

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=176585
Log:
2011-07-21  Bill Schmidt  <wschm...@linux.vnet.ibm.com>

    PR tree-optimization/49749
    * tree-ssa-reassoc.c (PHI_LOOP_BIAS): New constant.
    (phi_loop_bias): New function.
    (get_rank): Bias rank upward for loop-carried dependencies; fix
    errors in operand scan conditions.


Modified:
    branches/ibm/gcc-4_6-branch/gcc/ChangeLog.ibm
    branches/ibm/gcc-4_6-branch/gcc/tree-ssa-reassoc.c