Large number of tests failing - 64bit LDC with MSVC - Append Operator

[kinke via digitalmars-d-ldc]

> LLVM d89ac8f158976eaa9f9bcfba88f8a679771704f8

Thank you very much, this one works for me too with current LDC 
head. Compiling the tests right now...

> I'm only failing 41 test cases and I've just about to post 
> about how to fix an assembly optimization bug that will bring 
> that number down to 40 soon i hope.

Perfect, looking forward to it. :)
Note that there's 
https://github.com/ldc-developers/ldc/issues/758 to keep track of 
these failing tests on Win64. E.g., we've also had 41 failures on 
October 25th 2014.