[Bug tree-optimization/18437] vectorizer failed for matrix multiplication

[matz at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18437

--- Comment #6 from Michael Matz <matz at gcc dot gnu.org> 2012-04-17 13:54:36 
UTC ---
Author: matz
Date: Tue Apr 17 13:54:26 2012
New Revision: 186530

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=186530
Log:
    PR tree-optimization/18437

    * tree-vectorizer.h (_stmt_vec_info.stride_load_p): New member.
    (STMT_VINFO_STRIDE_LOAD_P): New accessor.
    (vect_check_strided_load): Declare.
    * tree-vect-data-refs.c (vect_check_strided_load): New function.
    (vect_analyze_data_refs): Use it to accept strided loads.
    * tree-vect-stmts.c (vectorizable_load): Ditto and handle them.

testsuite/
    * gfortran.dg/vect/rnflow-trs2a2.f90: New test.

Added:
    trunk/gcc/testsuite/gfortran.dg/vect/rnflow-trs2a2.f90
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vect-data-refs.c
    trunk/gcc/tree-vect-stmts.c
    trunk/gcc/tree-vectorizer.h