[Bug middle-end/106470] Subscribed access to __m256i casted to (uint16_t *) produces garbage or a warning

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106470

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The other fix is to use _mm256_extract_epi16.
E.g.


inline unsigned short extract_epi16(__m256i v, int pos) {
    switch(pos){
        case 0: return _mm256_extract_epi16(v, 0);
        case 1: return _mm256_extract_epi16(v, 1);
        case 2: return _mm256_extract_epi16(v, 2);
        case 3: return _mm256_extract_epi16(v, 3);
        case 4: return _mm256_extract_epi16(v, 4);
        case 5: return _mm256_extract_epi16(v, 5);
        case 6: return _mm256_extract_epi16(v, 6);
        case 7: return _mm256_extract_epi16(v, 7);
        case 8: return _mm256_extract_epi16(v, 8);
        case 9: return _mm256_extract_epi16(v, 9);
        case 10: return _mm256_extract_epi16(v, 10);
        case 11: return _mm256_extract_epi16(v, 11);
        case 12: return _mm256_extract_epi16(v, 12);
        case 13: return _mm256_extract_epi16(v, 13);
        case 14: return _mm256_extract_epi16(v, 14);
        case 15: return _mm256_extract_epi16(v, 15);
    }
    return 0;
}

...

        for (size_t i = 0; i < 16; i++) {
                printf(" %04x", extract_epi16(tmp, i));
        }