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

[Nikita Popov via llvm-commits]

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@@ -0,0 +1,70 @@
+
+#include "llvm/Analysis/AliasAnalysis.h"
+#include "llvm/Analysis/LoopAnalysisManager.h"
+#include "llvm/Analysis/TargetLibraryInfo.h"
+
+#include "llvm/IR/Function.h"
+
+#include "llvm/IR/Instructions.h"
+#include "llvm/Transforms/Utils/ValueMapper.h"
+#include <deque>
+
+// TODO note this doesn't go through [loop, unreachable], and we could get more
+// performance by doing this can consider doing some domtree magic potentially
+static inline llvm::SmallPtrSet<llvm::BasicBlock *, 4>
+getGuaranteedUnreachable(llvm::Function *F) {
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nikic wrote:

@wsmoses Could you please provide some context on what's up with this whole "guaranteed unreachable" logic?

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