re PR target/66049 (Few AArch64 extend and add with shift tests generates sub optimal...

re PR target/66049 (Few AArch64 extend and add with shift tests generates sub optimal code with trunk gcc 6.0.)

2015-05-26  Venkataramanan Kumar  <venkataramanan.kumar@amd.com>

        PR target/66049
        * config/aarch64/aarch64.md
        (*adds_shift_imm_<mode>):  New pattern.
        (*subs_shift_imm_<mode>):  Likewise.
        (*adds_<optab><ALLX:mode>_shift_<GPI:mode>):  Likewise.
        (*subs_<optab><ALLX:mode>_shift_<GPI:mode>): Likewise.
        (*add_uxt<mode>_shift2): Likewise.
        (*add_uxtsi_shift2_uxtw): Likewise.
        (*sub_uxt<mode>_shift2): Likewise.
        (*sub_uxtsi_shift2_uxtw): Likewise.

From-SVN: r223703