PR #52466: [tensorflow/compiler/mlir/hlo/lib/Analysis/userange_analys…

…is.cc] Add calls to `reserve()` before populating vector

Imported from GitHub PR tensorflow/tensorflow#52466

tensorflow/tensorflow#51739 (comment) told me to split the larger PR into one PR per file; thus this (thanks `bash`, `git` and `gh`!)
Copybara import of the project:

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cc99fd8ad768f2354674d130357a3efcce9ba475 by Samuel Marks <807580+SamuelMarks@users.noreply.github.com>:

[tensorflow/compiler/mlir/hlo/lib/Analysis/userange_analysis.cc] Add calls to `reserve()` before populating vectors

PiperOrigin-RevId: 405540491

lib/Analysis/userange_analysis.cc

@@ -593,7 +593,8 @@ size_t UserangeAnalysis::unwrapId(size_t id) const { return id / 2; }
 
 void UserangeAnalysis::dump(raw_ostream &os) {
   os << "// ---- UserangeAnalysis -----\n";
-  SmallVector<Value> values;
+  llvm::SmallVector<Value> values;
+  values.reserve(useIntervalMap.size());
   for (auto const &item : useIntervalMap) {
     values.push_back(item.first);
   }