[llvm] [PHIElimination] Handle subranges in LiveInterval updates (PR #69429)

[Carl Ritson via llvm-commits]

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@@ -136,6 +136,7 @@ INITIALIZE_PASS_END(PHIElimination, DEBUG_TYPE,
 
 void PHIElimination::getAnalysisUsage(AnalysisUsage &AU) const {
   AU.addUsedIfAvailable<LiveVariables>();
+  AU.addUsedIfAvailable<LiveIntervals>();
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perlfu wrote:

It seemed to me that if we use an analysis then we should declare that usage.
But I accept your logic and it doesn't make a different in practice here.

https://github.com/llvm/llvm-project/pull/69429