"Implement" codegen support for __noop().

Eli discovered that __noop's sema behavior also needs some love. I filed
PR14081 for that and intend to improve it.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@165886 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed