[BETA] Mir-algorithm compiler segmentation failure

[9il]

Hi
LDC beta fails in MirAlgorithm's Travis https://travis-ci.org/libmir/mir-algorithm/jobs/389055282

[kinke]

Thx for the report. Reduced, failing with ldc2 -c -mtriple=x86_64-linux-gnu:

struct ExtMulResult
{
    ulong low;
    ulong high;
}

ExtMulResult extMul(in ulong a, in ulong b) @nogc nothrow pure @safe
{
    import ldc.simd;
    auto r = inlineIR!(`
        %agg1 = insertvalue [2 x i64] undef, i64 %0, 0
        %agg2 = insertvalue [2 x i64] %agg1, i64 %1, 1
        ret [2 x i64] %agg2`, ulong[2])(a, b);

    return ExtMulResult(r[0], r[1]);
}

[kinke]

This apparently regressed (v1.9 works) because of a 2.080 Posix x86_64 ABI fix - ulong[2] is now returned in registers, not via sret.

[kinke]

[Btw, using return inlineIR!(..., ExtMulResult); directly would be nicer and work around it for the time being. That doesn't compile, sorry. ;)]

[kinke]

Fixed by #2732.