Remove an old workaround that was kept around for ABI-compatibility on x86-64 between different LLVM versions. This means LLVM r67588 is required if you want to compile for x86-64, otherwise the backend will assert when you try to return e.g. struct { int i; char c; } from a function. (In particular, this is no longer compatible with LLVM 2.5) It also means that any code returning small structs on x86-64 will probably need to be recompiled in order to be linkable to code compiled with this change.

We have two different test sets. For the test drivers
you need do compile the .d files in this folder with
a Phobos D compiler.

To run the 'mini' test suite run
./runminitests

To run the DStress based tests execute
./runtest tmp-sensible-name
and then use 
./findregressions old-results new-results 
to display a list of regressions. You can
download old result files from
http://www.incasoftware.de/~kamm/ldc/reference