[Bug tree-optimization/45578] [4.6 Regression] The polyhedron test mdbx is miscompiled with -O2 -ftree-vectorize at revision 163915

[rguenth at gcc dot gnu dot org]

------- Comment #7 from rguenth at gcc dot gnu dot org  2010-09-08 11:17 -------
Subject: Bug 45578

Author: rguenth
Date: Wed Sep  8 11:17:31 2010
New Revision: 163997

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=163997
Log:
2010-09-08  Richard Guenther  <rguent...@suse.de>

        PR tree-optimization/45578
        * tree-ssa-loop-ivopts.c (rewrite_use_nonlinear_expr):
        Be more careful when transfering alignment information to
        the new induction variable.
        (copy_ref_info): Likewise.

        * gfortran.dg/pr45578.f90: New testcase.

Added:
    trunk/gcc/testsuite/gfortran.dg/pr45578.f90
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-loop-ivopts.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45578