Fix for PR7040: Don't try to compute the LLVM type for a function where it
isn't possible to compute.

This patch is mostly refactoring; the key change is the addition of the code
starting with the comment, "Check whether the function has a computable LLVM
signature."  The solution here is essentially the same as the way the
vtable code handles such functions.

llvm-svn: 105151
8 files changed
tree: a206a768dff7cfbbacfb8b5ca8fc80fda294671c
  1. clang/
  2. compiler-rt/
  3. libcxx/
  4. llvm/