[Mlir-commits] [mlir] [mlir] Skip the promised-interface lookup for an emptied dialect set (NFC) (PR #219545)

[Mehdi Amini]

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@@ -228,6 +228,9 @@ class Dialect {
   void handleUseOfUndefinedPromisedInterface(TypeID interfaceRequestorID,
                                              TypeID interfaceID,
                                              StringRef interfaceName = "") {
+    // Most dialects promise nothing; skip hashing a key and probing the set.
+    if (unresolvedPromisedInterfaces.empty())
+      return;
     if (unresolvedPromisedInterfaces.count(
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joker-eph wrote:

> Also I don't quite get why both together would be different that just the check in doFind?

Can you clarify on this?

https://github.com/llvm/llvm-project/pull/219545