https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68823
--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> --- Created attachment 40662 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=40662&action=edit Isolated graphite dump for miscompiled function As shown in the dump file, there are dependencies for the problematic stmts: Adding must write to depedence graph: pdr_121 (write in gimple stmt: MEM[(Element_t[2] &)_7][0] = _9; data accesses: { S_3[i2] -> [2, o1, 0] : 8*floor((o1)/8) = o1 and 18446744073709551616*floor((8i2 - o1)/18446744073709551616) = 8i2 - o1 and 0 <= o1 <= 18446744073709551608 } Adding read to depedence graph: pdr_124 (read in gimple stmt: _15 = MEM[(int *)_14]; data accesses: { S_6[i1] -> [2, o1] : 18446744073709551616*floor((-8i1 + o1)/18446744073709551616) = -8i1 + o1 and 0 <= o1 <= 18446744073709551608 } If I understand the notation correctly, both have equal alias set (2). Do you see Sebastian why the dependence is not caught? Thanks
