hzfan commented on a change in pull request #5092: [TIR][PASS] dtype rewrite
for indexing variables
URL: https://github.com/apache/incubator-tvm/pull/5092#discussion_r400065401
##########
File path: src/tir/pass/unroll_loop.cc
##########
@@ -160,7 +160,9 @@ class LoopUnroller : public StmtExprMutator {
PrimExpr extent = tir::Simplify(op->extent);
const IntImmNode *v1 = extent.as<IntImmNode>();
int value = -1;
- if (v1 != nullptr) {
+ // integers that do not fit in int32_t are treated as symbolic,
+ // as it's impossible to unroll such large loops
+ if (v1 != nullptr && v1->value <= std::numeric_limits<int>::max()) {
Review comment:
My motivation here is to prevent overflow in the next line (which uses int):
```
value = static_cast<int>(v1->value);
```
IMO it might be fine to use `int` here, as it's consistent with other parts
of the pass. What do you think?
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