[llvm] [NewPM][CodeGen] Port MachineLICM to NPM (PR #107376)

[Akshat Oke via llvm-commits]

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@@ -126,6 +127,8 @@ namespace {
     TargetSchedModel SchedModel;
     bool PreRegAlloc = false;
     bool HasProfileData = false;
+    Pass *LegacyPass;
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Akshat-Oke wrote:

`MachineBasicBlock::SplitCriticalEdge` gets the analyses through one that is non-null.

Alternatively we can modify `SplitCriticalEdge` to be passed in the analyses rather than getting it itself.

https://github.com/llvm/llvm-project/pull/107376