Consider this file:
------------------------ repro.d -------------------------
struct A
{
float[4] array = [1, 2, 3, 4];
}
A _mm_add_ss(A a, A b) pure @safe
{
a.array[0] += b.array[0];
return a;
}
void main()
{
A a;
a = _mm_add_ss(a, a);
// this assert fails, content is [1, 2, 3, 4] instead
// This is a 2.085.0 regression
assert(a.array == [2.0f, 2, 3, 4]);
}
-----------------------------------------------------------
Build with DMD 2.085.0 on Windows:
$ dmd repro.d -O -inline -noboundscheck -m64 -inline -release -unittest
$ repro.exe
The assert fails, but it works in DMD 2.084.1
Comment #1 by r.sagitario — 2019-06-16T20:34:33Z
Seems fixed in dmd 2.086.0. Please reopen if it still occurs.