https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91029
--- Comment #10 from Andrew Macleod <amacleod at redhat dot com> --- Created attachment 49597 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=49597&action=edit op2_range implementation I think this does what you want for op2_range. I tried it with: void f1 (int i, int j) { if ((i % j) == 3) { xx = ((j <= 3) && (j >= -3)); if (xx) kill (); } } and it eliminates the call. the listing shows: if (_1 == 3) goto <bb 3>; [INV] else goto <bb 5>; [INV] _1 : int [-2147483647, +INF] 2->3 (T) _1 : int [3, 3] 2->3 (T) i_8(D) : int [3, +INF] 2->3 (T) j_9(D) : int [-INF, -4][4, +INF] 2->5 (F) _1 : int [-2147483647, 2][4, +INF] so its got int [-INF, -4][4, +INF] for the range which I think is correct? I got a headache trying to write a testcase for the different cases, and I'd probably get it wrong like I did with the initial implementation.. So I leave this with you to do what you will :-) I get all tangled up with the negatives.
