c: assignment/init of a function pointer whose function(s)
return to one which does not return (has noreturn attribute) 
should warn as it is an unsafe assignment. // rdar://10095762
c++ already handles this. This is the c version.

llvm-svn: 141141
3 files changed
tree: f3e0771f7294ad9b77b408624aabaa49e968065e
  1. clang/
  2. compiler-rt/
  3. debuginfo-tests/
  4. libcxx/
  5. libcxxabi/
  6. lldb/
  7. llvm/
  8. polly/