[llvm] change contents of ScalarEvolution from private to protected (PR #83052)

[Nikita Popov via llvm-commits]

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@@ -460,6 +460,10 @@ class ScalarEvolution {
     LoopComputable ///< The SCEV varies predictably with the loop.
   };
 
+  bool AssumeLoopExits = false;
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nikic wrote:

I'd make this AssumeLoopFinite to match existing terminology.

https://github.com/llvm/llvm-project/pull/83052