[llvm] [SCEV] Infer loop max trip count from memory accesses (PR #70361)

[Johannes Doerfert via llvm-commits]

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@@ -249,6 +249,10 @@ static cl::opt<bool> UseContextForNoWrapFlagInference(
     cl::desc("Infer nuw/nsw flags using context where suitable"),
     cl::init(true));
 
+static cl::opt<bool> UseMemoryAccessUBForBEInference(
+    "scalar-evolution-infer-max-trip-count-from-memory-access", cl::Hidden,
+    cl::desc("Infer loop max trip count from memory access"), cl::init(false));
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jdoerfert wrote:

Can you check the compile time impact (via @nikic tracker) when you enable this?

https://github.com/llvm/llvm-project/pull/70361