[llvm] GlobalISel lane masks merging (PR #73337)

[Matt Arsenault via llvm-commits]

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@@ -312,9 +306,9 @@ class SSAUpdaterTraits<MachineSSAUpdater> {
   static Register CreateEmptyPHI(MachineBasicBlock *BB, unsigned NumPreds,
                                  MachineSSAUpdater *Updater) {
     MachineBasicBlock::iterator Loc = BB->empty() ? BB->end() : BB->begin();
-    MachineInstr *PHI = InsertNewDef(TargetOpcode::PHI, BB, Loc,
-                                     Updater->VRC, Updater->MRI,
-                                     Updater->TII);
+    MachineInstr *PHI =
+        InsertNewDef(TargetOpcode::PHI, BB, Loc, Updater->RegAttrs,
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arsenm wrote:

Ditto 

https://github.com/llvm/llvm-project/pull/73337