[Bug tree-optimization/51581] Integer division by constant is not vectorized

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51581

--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-06-28 
17:54:03 UTC ---
Author: jakub
Date: Thu Jun 28 17:53:58 2012
New Revision: 189053

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=189053
Log:
    PR tree-optimization/51581
    * tree-vect-stmts.c (permute_vec_elements): Add forward decl.
    (vectorizable_operation): Handle vectorization of MULT_HIGHPART_EXPR
    also using VEC_WIDEN_MULT_*_EXPR or builtin_mul_widen_* plus
    VEC_PERM_EXPR if vector MULT_HIGHPART_EXPR isn't supported.
    * tree-vect-patterns.c (vect_recog_divmod_pattern): Use
    MULT_HIGHPART_EXPR instead of VEC_WIDEN_MULT_*_EXPR and shifts.

    * gcc.dg/vect/pr51581-4.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/vect/pr51581-4.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vect-patterns.c
    trunk/gcc/tree-vect-stmts.c