[Bug target/69868] vec_perm built-in is not handled by swap optimization on powerpc64le

[wschmidt at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69868

--- Comment #5 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Author: wschmidt
Date: Mon May  8 21:03:45 2017
New Revision: 247759

URL: https://gcc.gnu.org/viewcvs?rev=247759&root=gcc&view=rev
Log:
[gcc]

2016-05-08  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

        Backport from mainline
        PR target/69868 + swap optimization backports
        * config/rs6000/rs6000.c (swap_web_entry): Enlarge
        special_handling bitfield.
        (special_handling_values): Add SH_XXPERMDI, SH_CONCAT, SH_VPERM,
        and SH_VPERM_COMP.
        (const_load_sequence_p): New.
        (load_comp_mask_p): New.
        (v2df_reduction_p): New.
        (rtx_is_swappable_p): Perform special handling for XXPERMDI and
        for reductions.
        (insn_is_swappable_p): Perform special handling for VEC_CONCAT,
        V2DF reductions, and various permutes.
        (adjust_xxpermdi): New.
        (adjust_concat): New.
        (find_swapped_load_and_const_vector): New.
        (replace_const_vector_in_load): New.
        (adjust_vperm): New.
        (adjust_vperm_comp): New.
        (handle_special_swappables): Call adjust_xxpermdi, adjust_concat,
        adjust_vperm, and adjust_vperm_comp.
        (replace_swap_with_copy): Allow vector NOT operations to also be
        replaced by copies.
        (dump_swap_insn_table): Handle new special handling values.

[gcc/testsuite]

2016-05-08  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

        Backport from mainline
        PR target/69868 + swap optimization backports
        * gcc.target/powerpc/swaps-p8-20.c: New.
        * gcc.target/powerpc/swaps-p8-23.c: New.
        * gcc.target/powerpc/swaps-p8-24.c: New.


Added:
    branches/gcc-5-branch/gcc/testsuite/gcc.target/powerpc/swaps-p8-20.c
    branches/gcc-5-branch/gcc/testsuite/gcc.target/powerpc/swaps-p8-23.c
    branches/gcc-5-branch/gcc/testsuite/gcc.target/powerpc/swaps-p8-24.c
Modified:
    branches/gcc-5-branch/gcc/ChangeLog
    branches/gcc-5-branch/gcc/config/rs6000/rs6000.c
    branches/gcc-5-branch/gcc/testsuite/ChangeLog