[llvm] [SLP] Fix cost estimation of external uses with wrong VF (PR #148185)

[Alexey Bataev via llvm-commits]

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@@ -4357,7 +4357,7 @@ class BoUpSLP {
     const TreeEntry &E;
 
     /// Which lane does the scalar belong to.
-    int Lane;
+    unsigned Lane;
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alexey-bataev wrote:

These changes better to implement in a separate NFC patch

https://github.com/llvm/llvm-project/pull/148185