[llvm] [LAA/SLP] Don't truncate APInt in getPointersDiff (PR #139941)

[Reid Kleckner via llvm-commits]

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@@ -5368,7 +5369,7 @@ BoUpSLP::findReusedOrderedScalars(const BoUpSLP::TreeEntry &TE,
   // patterns.
   SmallVector<Value *> GatheredScalars(TE.Scalars.begin(), TE.Scalars.end());
   Type *ScalarTy = GatheredScalars.front()->getType();
-  int NumScalars = GatheredScalars.size();
+  uint64_t NumScalars = GatheredScalars.size();
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rnk wrote:

You could probably knock this out with a regex, `s/uint64_t Num(.*)\.size();/size_t Num\1.size();/`

https://github.com/llvm/llvm-project/pull/139941