[x86, SSE] remove the GCCBuiltins from the integer min/max intrinsics
This allows us to emit native IR in Clang (next commit).
Also, update the intrinsic tests to show that codegen already knows how to handle
the IR that Clang will soon produce.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272806 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed