[llvm] [TailDuplicator] Determine if computed gotos using `blockaddress` (PR #132536)

[Matt Arsenault via llvm-commits]

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@@ -313,6 +313,13 @@ class MachineBasicBlock
   const MachineFunction *getParent() const { return xParent; }
   MachineFunction *getParent() { return xParent; }
 
+  bool terminatorIsComputedGoto() const {
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arsenm wrote:

Document this 

https://github.com/llvm/llvm-project/pull/132536