[llvm] [CGData] Lazy loading support for stable function map (PR #151660)

[Zhaoxuan Jiang via llvm-commits]

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@@ -202,8 +241,11 @@ static bool isProfitable(
 }
 
 void StableFunctionMap::finalize(bool SkipTrim) {
+  deserializeLazyLoadingEntries();
+  SmallVector<HashFuncsMapType::iterator> ToDelete;
   for (auto It = HashToFuncs.begin(); It != HashToFuncs.end(); ++It) {
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nocchijiang wrote:

With `make_early_inc_range()` we have no way to access the underlying iterators, so we have to erase entries by key, introducing an additional hash lookup. Not sure if you are expecting this or have a better idea here.

https://github.com/llvm/llvm-project/pull/151660