Changed the handling of variadic intrinsics a bit. Removed the -fp80 option and made real be 80bit floats on X86, this is what the D spec really says it should be and fixes a bunch of issues. Changed the handling of parameter attributes to a bit more generalized approach. Added sext/zext attributes for byte/short/ubyte/ushort parameters, fixes #60 . Parameter attribs now properly set for intrinsic calls if necessary. Made the tango.math.Math patch less intrusive. Fixed/added some mini tests.

module classes6;
extern(C) int printf(char*, ...);

class C
{
    void f()
    {
        printf("world\n");
    }
}

class D : C
{
    void f()
    {
        printf("moon\n");
    }
}


extern(C)
{
    void srand(uint seed);
    int rand();
}

import llvmdc.intrinsics;

void main()
{
    C c;
    srand(readcyclecounter());
    if (rand() % 2)
        c = new C;
    else
        c = new D;
    c.f();
}