GlobalISel: select small binary operations on AArch64.

AArch64 actually supports many 8-bit operations under the definition used by
GlobalISel: the designated information-carrying bits of a GPR32 get the right
value if you just use the normal 32-bit instruction.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@284526 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed