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From GitBox <...@apache.org>
Subject [GitHub] [incubator-tvm] hzfan commented on a change in pull request #5367: Improve IntervalSet's floormod
Date Fri, 24 Apr 2020 12:53:06 GMT

hzfan commented on a change in pull request #5367:
URL: https://github.com/apache/incubator-tvm/pull/5367#discussion_r414552082



##########
File path: src/te/operation/compute_op.cc
##########
@@ -231,20 +231,18 @@ void ComputeOpNode::PropBoundToInputs(
           // undefined behaviour), so we can intersect the estimated set of the argument
with the
           // range expected by the tensor. However, intersection may result in overly complex
           // expressions, so we perform a more relaxed form of intersection.
-          IntSet arg_intset = EvalSet(call->args[i], dom_map);
+          IntSet arg_intset = analyzer->int_set(call->args[i], ConvertDomMap(dom_map));
           const arith::IntervalSetNode* arg_interval = arg_intset.as<arith::IntervalSetNode>();
           if (arg_interval) {
             PrimExpr shape_i_min_value = make_zero(t->shape[i].dtype());
             PrimExpr shape_i_max_value = t->shape[i] - 1;
             PrimExpr min_value = arg_interval->min_value;
             PrimExpr max_value = arg_interval->max_value;
             // Prefer the shape bounds only when we can prove they are tighter.
-            if (arith::is_neg_inf(min_value) ||
-                analyzer->CanProve(shape_i_min_value >= min_value)) {
+            if (arith::is_pos_inf(max_value) || arith::is_neg_inf(min_value) ||

Review comment:
       The condition seems quite loose. `max_value` gets updated when `arith::is_neg_inf(min_value)`
holds. Is this intended?
   




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