[llvm] [MachineSink] Extend loop sinking capability (PR #117247)

[Matt Arsenault via llvm-commits]

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@@ -679,6 +691,10 @@ void MachineSinking::FindCycleSinkCandidates(
     SmallVectorImpl<MachineInstr *> &Candidates) {
   for (auto &MI : *BB) {
     LLVM_DEBUG(dbgs() << "CycleSink: Analysing candidate: " << MI);
+    if (MI.isMetaInstruction()) {
+      LLVM_DEBUG(dbgs() << "CycleSink: Dont sink meta instructions\n");
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arsenm wrote:

```suggestion
      LLVM_DEBUG(dbgs() << "CycleSink: not sinking meta instruction\n");
```

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