[Bug tree-optimization/86855] REGRESSON: [8.0] -Ofast optimize away mm_set_ps(0.0f,0.0f,-0.0f,0.0f);

[vincenzo.innocente at cern dot ch]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86855

--- Comment #5 from vincenzo Innocente <vincenzo.innocente at cern dot ch> ---
I have indeed worked-around with

const __m128i neg = _mm_set_epi32(0,0,0x80000000,0);
__m128i ret = __m128i(_mm_sub_ps(v5, v3));
return __m128(_mm_xor_si128(ret,neg));

const  __m256i neg = _mm256_set_epi64x(0,0,0x8000000000000000,0);
return __m256d(_mm256_xor_si256(__m256i(ret), neg));

etc