[llvm] [Codegen][NewPM] Explicitly Nest Passes in CodegenPassBuilder (PR #169867)

[Arthur Eubanks via llvm-commits]

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@@ -108,6 +108,7 @@
 #include "llvm/IRPrinter/IRPrintingPasses.h"
 #include "llvm/MC/MCAsmInfo.h"
 #include "llvm/MC/MCTargetOptions.h"
+#include "llvm/Pass.h"
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aeubanks wrote:

why do we need this?

https://github.com/llvm/llvm-project/pull/169867