[llvm] [LoopUnroll] Bound automatic full-unroll cloning work (PR #211683)

[Justin Fargnoli via llvm-commits]

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@@ -701,6 +701,9 @@ class TargetTransformInfo {
     /// applies even if full unrolling is selected. This allows a target to fall
     /// back to Partial unrolling if full unrolling is above FullUnrollMaxCount.
     unsigned FullUnrollMaxCount;
+    /// Set the maximum estimated instructions cloned by automatic full
+    /// unrolling. Set to UINT64_MAX to disable.
+    uint64_t FullUnrollMaxClonedInstructions;
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justinfargnoli wrote:

I'm not sure if this makes sense to live in UP. Why would different targets want different values? 

https://github.com/llvm/llvm-project/pull/211683