https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116765
Hongtao Liu <liuhongt at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |liuhongt at gcc dot gnu.org
--- Comment #3 from Hongtao Liu <liuhongt at gcc dot gnu.org> ---
So -mavx2 is sufficient to reprodcue the issue.
There're cross-iteration dependence for the inner loop
ok[i][j] = ok[i][j] | ok[i + 1][j] | ok[i][j - 1];
loop vectorizer shouldn't use 256-bit for vectorization(128-bit is fine since
std::bitset<105> takes 128-bit, it's slp inside the loop)
