[Bug tree-optimization/54132] [4.8 Regression] Incorrect loop transformation with -ftree-loop-distribute-patterns

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54132

--- Comment #3 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-09-19 
08:59:18 UTC ---
Author: rguenth
Date: Wed Sep 19 08:59:06 2012
New Revision: 191463

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=191463
Log:
2012-09-19  Richard Guenther  <rguent...@suse.de>

    PR tree-optimization/54132
    * tree-loop-distribution.c (classify_partition): Properly
    check dependences for memmove.
    * tree-data-ref.h (compute_affine_dependence): Declare.
    * tree-data-ref.c (compute_affine_dependence): Export.

    * gcc.dg/tree-ssa/ldist-21.c: New testcase.
    * gcc.dg/torture/pr54132.c: Likewise.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr54132.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ldist-21.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-data-ref.c
    trunk/gcc/tree-data-ref.h
    trunk/gcc/tree-loop-distribution.c