Visual C++ has an intrinsic function called _AddressOfReturnAddress which returns the address of the current function's return address on the stack.
Note that this is not the same as _ReturnAddress, which only returns a copy of the return address.
Is there any equivalent for _AddressOfReturnAddress in Clang/LLVM?
As rustyx pointed out, Clang/LLVM (and GCC) provides __builtin_return_address() which is equivalent to _ReturnAddress(). Clang/LLVM also provides __builtin_frame_address() which (depending on the particulars of your ABI, architecture, etc.) may be somewhat analogous to _AddressOfReturnAddress().
As an example, the following code...
std::cout<< ((int64_t) __builtin_return_address(0)) << ' '
<< ((int64_t) __builtin_frame_address (0)) << ' '
<<*((int64_t*)__builtin_frame_address (0)+1)<<'\n';
...prints the following on an OS X machine.
140735807202733 140734600362944 140735807202733