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 mini.packed1;

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

align(1)
struct PackedStruct
{
    ubyte ub;
    float f;
    long l;
    short s;
    ubyte ub2;
    short s2;
}

void main()
{
    PackedStruct[2] a = void;
    void* begin = a.ptr;
    void* end = &a[1];
    ptrdiff_t sz = end - begin;
    printf("size = 18 = %u = %u\n", PackedStruct.sizeof, sz);
    assert(sz == 18);
}