Add clang -mcpu=native support, patch by Roman Divacky, varioustweaks by me.
 - We still need support for detecting the target features, since the name
   doesn't actually do a good job of decribing what the CPU supports (for LLVM).

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@88819 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed