> So what's your opinion on the "bug" that triggered the patch in question?\ > Namely extract_muldiv_1 folding > > (((10240 - (sizetype) first) + 1) * 8) /[cl] 8 > > to > > ((sizetype) first * 0x0fffffffffffffff8 + 81928) /[cl] 8 > > to > > ((sizetype) first * 2305843009213693951 + 10241)
I think this optimization "works" if you sign-extend the constant when you do division by 8.
