llvm-svn: 316228
This avoids llc using the hosts OS/vendor as defaults and triggering unwanted behaviour in the tests. This should deal with the buildbot breakages on windows after r283140. llvm-svn: 283149
Patch by Jyotsna Verma. llvm-svn: 268051
Patch by Anand Kodnani. llvm-svn: 261218