[ARM] Set mode for success result of atomic compare and swap

[ARM] Set mode for success result of atomic compare and swap

2017-05-03  Thomas Preud'homme  <thomas.preudhomme@arm.com>

gcc/
    * config/arm/iterators.md (CCSI): New mode iterator.
    (arch): New mode attribute.
    * config/arm/sync.md (atomic_compare_and_swap<mode>_1): Rename into ...
    (atomic_compare_and_swap<CCSI:arch><NARROW:mode>_1): This and ...
    (atomic_compare_and_swap<CCSI:arch><SIDI:mode>_1): This.  Use CCSI
    code iterator for success result mode.
    * config/arm/arm.c (arm_expand_compare_and_swap): Adapt code to use
    the corresponding new insn generators.

From-SVN: r247542