[llvm] Port gisel cse analysis to npm (PR #179815)

[Matt Arsenault via llvm-commits]

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@@ -225,6 +225,17 @@ class GISelCSEAnalysisWrapper {
   void releaseMemory() { Info.releaseMemory(); }
 };
 
+class GISelCSEAnalysisWrapperAnalysis
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arsenm wrote:

"AnalysisWrapperAnalysis". GISelCSEAnalysisWrapper probably should directly be the result type.

I think this whole thing should be restructured. I don't really see the point of GISelCSEAnalysisWrapper. 

https://github.com/llvm/llvm-project/pull/179815