[llvm] [AArch64] TableGen-erate SDNode descriptions (PR #140472)

[Sergei Barannikov via llvm-commits]

================
@@ -1,12 +1,12 @@
-//===- llvm/unittest/CodeGen/AArch64SelectionDAGTest.cpp -------------------------===//
+//===- llvm/unittest/CodeGen/AArch64SelectionDAGTest.cpp ------------------===//
----------------
s-barannikov wrote:

The file path needs to be updated or the line replaced with
```suggestion
//===----------------------------------------------------------------------===//
```
as the coding standard no longer requires it to contain the file path.

The changes in `unittests/` are necessary since the test now requires linking with `AArch64CodeGen` it didn't depend on before (even though it included `AArch64ISelLowering.h`).
Could be extracted into a separate PR.


https://github.com/llvm/llvm-project/pull/140472