mbs-octoml commented on code in PR #11091:
URL: https://github.com/apache/tvm/pull/11091#discussion_r864870361
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src/relay/backend/aot_executor_codegen.cc:
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@@ -215,11 +217,21 @@ class AOTOnDemandAllocator : public
transform::DeviceAwareExprVisitor {
* \return The corresponding token.
*/
StorageInfo GetStorage(const Expr& expr) {
+ Expr true_expr = expr;
+
+ // Don't get storage for let nodes.
+ while (const auto* let_node = true_expr.as<LetNode>()) {
Review Comment:
No objection from me if you want to just do the loop directly as I find that
much clearer. In my travels I found switching to pre- and post-let-binding
visitor overloads made the most sense when you find you need to accumulate
intermediate rewritten bindings on a local stack in order to reconstruct the
final let chain. ExpandANormalForm also achieves the same effect all be it by
relying on the implicit memoization to capture the intermediate results (which
hurts my head every time I come across it!)
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