[clang] [clang][mutation analyzer][NFC] Simplify code in ExprMutationAnalyzer (PR #125283)

[Balazs Benics via cfe-commits]

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@@ -813,10 +813,7 @@ FunctionParmMutationAnalyzer::findMutation(const ParmVarDecl *Parm) {
   // before analyzing parameters of A. Then when analyzing the second "call A",
   // FunctionParmMutationAnalyzer can use this memoized value to avoid infinite
   // recursion.
-  Results[Parm] = nullptr;
-  if (const Stmt *S = BodyAnalyzer.findMutation(Parm))
-    return Results[Parm] = S;
-  return Results[Parm];
+  return Results[Parm] = BodyAnalyzer.findMutation(Parm);
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steakhal wrote:

Fixed. I usually use "Place" or "Slot" for this.

https://github.com/llvm/llvm-project/pull/125283