Anndrey24 commented on code in PR #17046:
URL: https://github.com/apache/tvm/pull/17046#discussion_r1622503667
##########
src/arith/rewrite_simplify.cc:
##########
@@ -1136,8 +1136,15 @@ PrimExpr RewriteSimplifier::Impl::VisitExpr_(const
FloorDivNode* op) {
x + floordiv(y, z), CanProveGreaterEqual(z.Eval(), 0));
TVM_TRY_REWRITE_IF(matches_one_of(floordiv(y + x * z, z), floordiv(y + z *
x, z)),
floordiv(y, z) + x, CanProveGreaterEqual(z.Eval(), 0));
+ TVM_TRY_REWRITE_IF(floordiv(x * z * c1 + y, z * c1), x + floordiv(y, z *
c1),
+ CanProveGreaterEqual(z.Eval() * c1.Eval(), 0));
Review Comment:
I went ahead and implemented the `CanProveGreater()` function and took the
opportunity to change all other cases of possible division by zero that I could
find in the `rewrite_simplify.cc` rules to use it too.
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