Reenable druntime optimizations on pre-3.2 LLVM versions.
Merge pull request #285 from klickverbot/old-llvm-opt

Reenable druntime optimizations on pre-3.2 LLVM versions.
Support for Windows x64 ABI.
Merge pull request #287 from kinke/master

Win64 ABI support
Fix #265: Use declared struct type in initexpr.
Fixed broken static struct member initializer
Un-unroll static array,

[David Nadlinger] Note that DtoStructLiteralValues was/is used
only once across the codebase.