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.

private import tango.core.Thread;

extern(C) void printf(char*, ...);

void foo()
{
		printf("-- I am here\n");
		Fiber.yield();
		printf("-- Now I am here\n");
}

void main()
{
	Fiber f = new Fiber(&foo);

	printf("Running f once\n");
	f.call();
	printf("Running f again\n");
	f.call();
}