[llvm] LiveIntervals: Use BumpPtrAllocator (PR #127057)

[Nikita Popov via llvm-commits]

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@@ -64,6 +65,12 @@ class LiveIntervals {
   MachineDominatorTree *DomTree = nullptr;
   std::unique_ptr<LiveIntervalCalc> LICalc;
 
+  // Allocator for RegUnitRanges and SubRanges.
+  BumpPtrAllocator Allocator;
+
+  // Allocator for VirtRegIntervals
+  SpecificBumpPtrAllocator<LiveInterval> LIAllocator;
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nikic wrote:

Need this for LiveRange as well, as it contains vectors.

https://github.com/llvm/llvm-project/pull/127057