https://issues.dlang.org/show_bug.cgi?id=19748
Issue ID: 19748 Summary: [REG][wrong codegen] Returning 4 floats + DMD + 64-bit Product: D Version: D2 Hardware: x86_64 OS: Windows Status: NEW Severity: regression Priority: P1 Component: dmd Assignee: nob...@puremagic.com Reporter: alil...@gmail.com 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 --