Bug 24390 – AssertError@src/dmd/backend/cgxmm.d(1476): Assertion failure

This is triggered by the back-end inliner. --- import inteli.pmmintrin; void main() { __vector(int[4]) mmA ; __vector(int[4]) mmB ; auto mask = _mm_cmpestrm(mmA, mmB); } __vector(int[4]) _mm_cmpestrm(__vector(int[4]) mmA, __vector(int[4]) mmB) { __vector(int[4]) R; for (int pos ; pos < 16; ++pos) { byte charK = (cast(__vector(byte[16]))mmA).array[pos]; __vector(int[4]) eqMask = _mm_set1_epi8(charK); R = R & eqMask; } return R; } --- module inteli.pmmintrin; public import inteli.emmintrin; --- module inteli.emmintrin; __vector(int[4]) _mm_set1_epi8 (byte a) { __vector(byte[16]) b = a; return cast(__vector(int[4]))b; } ---

Fixed https://github.com/dlang/dmd/pull/16181 https://github.com/dlang/dmd/commit/98443676dcfa32f7234ebab6ca9f925e1d3cd736