[llvm] [AArch64][GlobalISel] Add combine for build_vector(unmerge, unmerge, undef, undef) (PR #165539)

[David Green via llvm-commits]

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@@ -39,6 +39,7 @@
 #include "llvm/CodeGen/TargetOpcodes.h"
 #include "llvm/CodeGen/TargetPassConfig.h"
 #include "llvm/Support/Debug.h"
+#include <set>
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davemgreen wrote:

Can undo this files changes now.

https://github.com/llvm/llvm-project/pull/165539