[llvm] [InlineCost] Cache collectEphemeralValues() to save compile time (PR #130210)

[via llvm-commits]

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@@ -388,6 +389,8 @@ PreservedAnalyses InlinerPass::run(LazyCallGraph::SCC &InitialC,
         Advice->recordUnsuccessfulInlining(IR);
         continue;
       }
+      // The caller was modified, so invalidate Ephemeral Values.
+      FAM.getResult<EphemeralValuesAnalysis>(F).clear();
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vporpo wrote:

I think so, but let's make this a separate patch in case it breaks something. I added a TODO.

https://github.com/llvm/llvm-project/pull/130210