[llvm] [FuncSpec] Improve accounting of specialization codesize growth (PR #113448)

[Alexandros Lamprineas via llvm-commits]

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@@ -131,13 +131,16 @@ struct Spec {
   // Profitability of the specialization.
   unsigned Score;
 
+  // Cost of the specialization, in terms of codesize.
+  unsigned CodeSizeCost;
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labrinea wrote:

If we decide to keep this field please s/CodeSizeCost/CodeSize and update the comment please ("Number of instructions of the specialization" or similar)

https://github.com/llvm/llvm-project/pull/113448