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

[Craig Topper via llvm-commits]

================
@@ -56,6 +56,8 @@
 #include <cstdint>
 #include <iterator>
 #include <map>
+#include <queue>
----------------
topperc wrote:

I think this question still needs addressed. There's no other changes in this file. is this needed? If it is needed should it be in a cpp file?

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