Stefan Krah <ste...@bytereef.org> added the comment:
icc does not like the label reordering from:
ddd1949fea59f256e51191540a4446f75ed608fa
This is one step further, but not much. Possibilities are still:
1) The reordering exposes an overflow.
2) The new ordering is not supported by icc, it introduces UB
that is masked by -fwrapv (again, does -fwrapv only disable
a single optimization? My guess is that it disables several).
This was found by automated bisecting, I still have no time to really
investigate what is going on.
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue40223>
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