The address of a TLS var is not compile-time constant (PR13720)

This makes Clang produce an error for code such as:

  __thread int x;
  int *p = &x;

The lvalue of a thread-local variable cannot be evaluated at compile
time.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@162835 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed