[Bug tree-optimization/46928] data dependence analysis fails on constant array accesses

[spop at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46928

--- Comment #6 from Sebastian Pop <spop at gcc dot gnu.org> 2010-12-15 05:04:43 
UTC ---
Author: spop
Date: Wed Dec 15 05:04:40 2010
New Revision: 167843

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=167843
Log:
Fix PR46928: handle "A[p] == A[p]" in data dep analysis with p a parameter of
the loop.

2010-12-14  Sebastian Pop  <sebastian....@amd.com>

    PR tree-optimization/46928
    * tree-data-ref.c (analyze_overlapping_iterations): Handle "A[p] == A[p]"
    in data dependence analysis with p a parameter of the loop.

    * gcc.dg/tree-ssa/ldist-17.c: New.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ldist-17.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-data-ref.c