Update comments now that LLVM PR3861 has been fixed. However, since conditionally removing the workaround makes the ABI dependent on LLVM version, I reconsidered that. (The same revision of LDC compiling for the same target should probably produce code that follows the same ABI, right?)

module complex1;

void main()
{
    cfloat cf1 = 3f + 0i;
    cfloat cf2 = 4f + 1i;
    cfloat cf3 = func();
    auto c1 = cf1 + cf2;
    auto c2 = cf2 - cf3;
    auto c3 = cf1 * cf3;
    auto c4 = cf2 / cf3;
}

cfloat func()
{
    return 3f + 1i;
}