https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80349
--- Comment #14 from Marek Polacek <mpolacek at gcc dot gnu.org> --- I believe this all section needs fixing and new testcases: 10793 tree arg00 = TREE_OPERAND (arg0, 0); 10794 tree arg01 = TREE_OPERAND (arg0, 1); 10795 tree arg10 = TREE_OPERAND (arg1, 0); 10796 tree arg11 = TREE_OPERAND (arg1, 1); 10797 tree itype = TREE_TYPE (arg0); 10798 10799 if (operand_equal_p (arg01, arg11, 0)) 10800 return fold_build2_loc (loc, code, type, 10801 fold_build2_loc (loc, BIT_AND_EXPR, itype, 10802 fold_build2_loc (loc, 10803 BIT_XOR_EXPR, itype, 10804 arg00, arg10), 10805 arg01), 10806 build_zero_cst (itype)); 10807 10808 if (operand_equal_p (arg01, arg10, 0)) 10809 return fold_build2_loc (loc, code, type, 10810 fold_build2_loc (loc, BIT_AND_EXPR, itype, 10811 fold_build2_loc (loc, 10812 BIT_XOR_EXPR, itype, 10813 arg00, arg11), 10814 arg01), 10815 build_zero_cst (itype)); 10816 10817 if (operand_equal_p (arg00, arg11, 0)) 10818 return fold_build2_loc (loc, code, type, 10819 fold_build2_loc (loc, BIT_AND_EXPR, itype, 10820 fold_build2_loc (loc, 10821 BIT_XOR_EXPR, itype, 10822 arg01, arg10), 10823 arg00), 10824 build_zero_cst (itype)); 10825 10826 if (operand_equal_p (arg00, arg10, 0)) 10827 return fold_build2_loc (loc, code, type, 10828 fold_build2_loc (loc, BIT_AND_EXPR, itype, 10829 fold_build2_loc (loc, 10830 BIT_XOR_EXPR, itype, 10831 arg01, arg11), 10832 arg00), 10833 build_zero_cst (itype));
