Diana Picus 126de9311e Add AArch64 unit tests
Add unit tests for checking a few tricky instruction sizes. Also remove the old
tests for the instruction sizes, which were clunky and brittle.

Since this is the first set of target-specific unit tests, we need to add some
CMake plumbing. In the future, adding unit tests for a given target will be as
simple as creating a directory with the same name as the target under
unittests/Target. The tests are only run if the target is enabled in
LLVM_TARGETS_TO_BUILD.

Differential Revision: https://reviews.llvm.org/D24548

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@283990 91177308-0d34-0410-b5e6-96231b3b80d8
2016-10-12 09:00:44 +00:00
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