https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88473
--- Comment #8 from Hongtao.liu <crazylht at gmail dot com> ---
(In reply to Andrew Pinski from comment #7)
> The UNSPEC_MASKOP ones are still there.
>
> PR 93885 is the same issue.
void test(void* data, void* data2)
{
__m128i v = _mm_load_si128((__m128i const*)data);
__mmask8 m = _mm_testn_epi16_mask(v, v);
m = m | 0x0f;
m = m | 0xf0;
v = _mm_maskz_add_epi16(m, v, v);
_mm_store_si128((__m128i*)data2, v);
}
Should be ok.
Currently we rely on RA to choose whether to use mask register or gpr for
bitwise operation, which means that if we remove UNSPEC_MASKOP, _kor_mask8 will
only generate gpr orb, to ensure the correspondence between intrinsic and
instruction, UNSPEC_MASKOP is necessary, if the user wants GCC to optimize
bitwise operation, it is recommended to use bitwise operator instead of
intrinsic.
