Re-apply [1346], which was reverted in [1348], now that padding should no longer be a problem. As noted before, this will break ABI-compatibility on x86-64, so recompile old code before linking with newly-compiled code if you're on x86-64. As an added bonus, I actually tested it this time :).

LLVM D Compiler (LDC)

This compiler is based on the Digital Mars D (DMD) compiler frontend, and
the LLVM compiler toolkit. See LICENSE for licensing information.

For more information, including build instructions, visit the LDC website:

http://www.dsource.org/projects/llvmdc