[llvm] [MachineSink] Add option for aggressive loop sinking (PR #117247)

[Matt Arsenault via llvm-commits]

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@@ -256,6 +262,13 @@ class MachineSinking : public MachineFunctionPass {
                                SmallVectorImpl<MachineInstr *> &Candidates);
   bool SinkIntoCycle(MachineCycle *Cycle, MachineInstr &I);
 
+  bool isDead(const MachineInstr *MI) const;
+  bool AggressivelySinkIntoCycle(
+      MachineCycle *Cycle, MachineInstr &I,
+      DenseMap<MachineInstr *,
+               std::list<std::pair<MachineBasicBlock *, MachineInstr *>>>
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arsenm wrote:

Passed map by value? 

https://github.com/llvm/llvm-project/pull/117247