llvm/test/CodeGen/X86: Update tests with -mattr=-bmi not to take BMI, corresponding to Craig's r189742.

AMD Piledriver builder detected failures.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189754 91177308-0d34-0410-b5e6-96231b3b80d8
FileCheck-ize three tests of llvm/test/CodeGen/X86/h-register(s).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189755 91177308-0d34-0410-b5e6-96231b3b80d8
ARM: Default to Swift when compiling for iOS 6 or later.

Test cases adjusted accordingly.

This fixes rdar://14871821.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189756 91177308-0d34-0410-b5e6-96231b3b80d8