[Bug tree-optimization/41783] r151561 (PRE fix) regresses zeusmp

["matz at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #16 from matz at gcc dot gnu dot org  2010-01-19 16:06 -------
Subject: Bug 41783

Author: matz
Date: Tue Jan 19 16:05:57 2010
New Revision: 156043

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=156043
Log:
        PR tree-optimization/41783
        * tree-data-ref.c (toplevel): Include flags.h.
        (dump_data_dependence_relation):  Also dump the inputs if the
        result will be unknown.
        (split_constant_offset_1): Look through some conversions.
        * tree-predcom.c (determine_roots_comp): Restart a new chain if
        the offset from last element is too large.
        (ref_at_iteration): Deal also with MISALIGNED_INDIRECT_REF.
        (reassociate_to_the_same_stmt): Handle vector registers.
        * tree-vect-data-refs.c (vect_equal_offsets): Handle unary operations
        (e.g. conversions).
        * tree-vect-loop-manip.c (vect_gen_niters_for_prolog_loop): Add 
        wide_prolog_niters argument, emit widening instructions.
        (vect_do_peeling_for_alignment): Adjust caller, use widened
        variant of the iteration cound.
        * Makefile.in (tree-data-ref.o): Add $(FLAGS_H).

testsuite/
        * gfortran.dg/vect/fast-math-mgrid-resid.f: New.

Added:
    trunk/gcc/testsuite/gfortran.dg/vect/fast-math-mgrid-resid.f
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/Makefile.in
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-data-ref.c
    trunk/gcc/tree-predcom.c
    trunk/gcc/tree-vect-data-refs.c
    trunk/gcc/tree-vect-loop-manip.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41783