The tests only specify -march, so when the tests are run on AIX the target OS defaults to AIX, which causes the tests to misbehave.
This patch constrains the tests by specifying -mtriple instead of -march.
Reviewed By: daltenty, jsji, MaskRay
Differential Revision: https://reviews.llvm.org/D110186
Previously these pseudo instructions were not guarded by ISA, so their
select was dependant on the ordering of the entries in the DAG matcher.
Reviewers: atanasyan
Differential Revision: https://reviews.llvm.org/D39723
llvm-svn: 317681