[llvm] [IA]: Construct (de)interleave4 out of (de)interleave2 (PR #89276)

[Paul Walker via llvm-commits]

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@@ -3167,7 +3168,8 @@ class TargetLoweringBase {
   /// \p II is the interleave intrinsic.
   /// \p SI is the accompanying store instruction
   virtual bool lowerInterleaveIntrinsicToStore(IntrinsicInst *II,
-                                               StoreInst *SI) const {
+                                               StoreInst *SI,
+                                               SmallVectorImpl<Instruction *> &DeadInstructions) const {
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paulwalker-arm wrote:

Please use consistent names for both functions (i.e. either `DeadInsts` or `DeadInstructions` but not both).

https://github.com/llvm/llvm-project/pull/89276