Add plumbing to support programatically defining __SSE2__ and friends,
even though we still hard code sse2 for now.  No support for 3dnow or sse4a,
but someone could add that if they desired.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65886 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed