DMD2 vs LDC2 inliner

[James Blachly via Digitalmars-d-learn]

Any ideas why DMD2 cannot inline this, but LDC2 has no problem doing so 
-- or suggestions for what I can do to make DMD2 inline it?

Alternatively, I could version(DigitalMars) and version(LDC), but AFAICT 
this requires me to duplicate the entire template, because I cannot 
figure out how to make the version() directive apply only to the pragma.

Template instantiation is with a simple struct having integer members 
start and end.

Thanks in advance for tips.
---
pragma(inline, true)
bool overlaps(IntervalType1, IntervalType2)(IntervalType1 int1, 
IntervalType2 int2)
if (__traits(hasMember, IntervalType1, "start") &&
    __traits(hasMember, IntervalType1, "end") &&
    __traits(hasMember, IntervalType2, "start") &&
    __traits(hasMember, IntervalType2, "end"))
{
    // int1   =====    =======
    // int2 =======  =======
    if (int2.start <= int1.start &&  int1.start < int2.end) return true;

    // int1  =======  =======
    // int2   ===      =======
    else if (int1.start <= int2.start && int2.start < int1.end) return 
true;

    // int1  =====        |       =====
    // int2       =====   |  =====
    else return false;
}