MSVC v19 optimiser freezes when compiling GetTrianglesIndices_MSVC19_Deadlock

msvc19_deadlock.cpp

//
// The MSVC 19 optimizer deadlocks when compiling GetTrianglesIndices_MSVC19_Deadlock.
// Tested on cl.exe v19.27.29112 & v19.29.30142.1
//
// See: https://godbolt.org/z/o8rWsWsbb
//

//! Get triangles indices.
//! \remark The array needs to have room for 36 elements.
static void GetTrianglesIndices_MSVC19_NoCrash(int* pIndices, bool bCW) {
  if (bCW) {
    pIndices[0] = 5; pIndices[1] = 6; pIndices[2] = 1;
    pIndices[3] = 6; pIndices[4] = 2; pIndices[5] = 1;
    pIndices[6] = 7; pIndices[7] = 4; pIndices[8] = 3;
    pIndices[9] = 3; pIndices[10] = 4; pIndices[11] = 0;
    pIndices[12] = 7; pIndices[13] = 6; pIndices[14] = 4;
    pIndices[15] = 6; pIndices[16] = 5; pIndices[17] = 4;
    pIndices[18] = 0; pIndices[19] = 1; pIndices[20] = 3;
    pIndices[21] = 1; pIndices[22] = 2; pIndices[23] = 3;
    pIndices[24] = 6; pIndices[25] = 7; pIndices[26] = 2;
    pIndices[27] = 7; pIndices[28] = 3; pIndices[29] = 2;
    pIndices[30] = 4; pIndices[31] = 5; pIndices[32] = 0;
    pIndices[33] = 5; pIndices[34] = 1; pIndices[35] = 0;
  }
  else {
    pIndices[0] = 5; pIndices[1] = 1; pIndices[2] = 6;
    pIndices[3] = 6; pIndices[4] = 1; pIndices[5] = 2;
    pIndices[6] = 7; pIndices[7] = 3; pIndices[8] = 4;
    pIndices[9] = 3; pIndices[10] = 0; pIndices[11] = 4;
    pIndices[12] = 7; pIndices[13] = 4; pIndices[14] = 6;
    pIndices[15] = 6; pIndices[16] = 4; pIndices[17] = 5;
    pIndices[18] = 0; pIndices[19] = 3; pIndices[20] = 1;
    pIndices[21] = 1; pIndices[22] = 3; pIndices[23] = 2;
    pIndices[24] = 6; pIndices[25] = 2; pIndices[26] = 7;
    pIndices[27] = 7; pIndices[28] = 2; pIndices[29] = 3;
    pIndices[30] = 4; pIndices[31] = 0; pIndices[32] = 5;
    pIndices[33] = 5; pIndices[34] = 0; pIndices[35] = 1;
  }
}

//! Get triangles indices.
//! \remark The array needs to have room for 36 elements.
static void GetTrianglesIndices_MSVC19_Deadlock(int* pIndices, bool bCW) {
    if (bCW) {
        *pIndices++ = 5; *pIndices++ = 6; *pIndices++ = 1;
        *pIndices++ = 6; *pIndices++ = 2; *pIndices++ = 1;
        *pIndices++ = 7; *pIndices++ = 4; *pIndices++ = 3;
        *pIndices++ = 3; *pIndices++ = 4; *pIndices++ = 0;
        *pIndices++ = 7; *pIndices++ = 6; *pIndices++ = 4;
        *pIndices++ = 6; *pIndices++ = 5; *pIndices++ = 4;
        *pIndices++ = 0; *pIndices++ = 1; *pIndices++ = 3;
        *pIndices++ = 1; *pIndices++ = 2; *pIndices++ = 3;
        *pIndices++ = 6; *pIndices++ = 7; *pIndices++ = 2;
        *pIndices++ = 7; *pIndices++ = 3; *pIndices++ = 2;
        *pIndices++ = 4; *pIndices++ = 5; *pIndices++ = 0;
        *pIndices++ = 5; *pIndices++ = 1; *pIndices++ = 0;
    }
    else {
        *pIndices++ = 5; *pIndices++ = 1; *pIndices++ = 6;
        *pIndices++ = 6; *pIndices++ = 1; *pIndices++ = 2;
        *pIndices++ = 7; *pIndices++ = 3; *pIndices++ = 4;
        *pIndices++ = 3; *pIndices++ = 0; *pIndices++ = 4;
        *pIndices++ = 7; *pIndices++ = 4; *pIndices++ = 6;
        *pIndices++ = 6; *pIndices++ = 4; *pIndices++ = 5;
        *pIndices++ = 0; *pIndices++ = 3; *pIndices++ = 1;
        *pIndices++ = 1; *pIndices++ = 3; *pIndices++ = 2;
        *pIndices++ = 6; *pIndices++ = 2; *pIndices++ = 7;
        *pIndices++ = 7; *pIndices++ = 2; *pIndices++ = 3;
        *pIndices++ = 4; *pIndices++ = 0; *pIndices++ = 5;
        *pIndices++ = 5; *pIndices++ = 0; *pIndices++ = 1;
    }
}

// Type your code here, or load an example.
int square(int num) {
    int indices[32] = {};
    //GetTrianglesIndices_MSVC19_NoCrash(indices,true);
    GetTrianglesIndices_MSVC19_Deadlock(indices,true);
    return 123;
}