[AArch64] [BE] [1/2] Make large opaque integer modes endianness-safe.

[David Sherwood]

Hi,

I have a fix (originally written by Tejas Belagod) for the following bug:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59810

Could someone take a look please?

Thanks!
David Sherwood.

ChangeLog:

    gcc/:
    2014-10-10  David Sherwood  <david.sherw...@arm.com>

        * config/aarch64/aarch64-protos.h (aarch64_simd_attr_length_rglist,
        aarch64_reverse_mask): New decls.
        * config/aarch64/iterators.md (UNSPEC_REV_REGLIST): New enum.
        * config/aarch64/iterators.md (insn_count): New mode_attr.
        * config/aarch64/aarch64-simd.md (vec_store_lanes(o/c/x)i,
        vec_load_lanes(o/c/x)i): Fixed to work for Big Endian. 
        * config/aarch64/aarch64-simd.md (aarch64_rev_reglist,
        aarch64_simd_(ld/st)(2/3/4)): Added.
        * config/aarch64/aarch64.c (aarch64_simd_attr_length_rglist,
        aarch64_reverse_mask): Added.

ccmc_v1.patch
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