[llvm] [GlobalIsel] Combine extract vector element (PR #90339)

[Matt Arsenault via llvm-commits]

================
@@ -571,3 +571,84 @@ body:             |
     RET_ReallyLR implicit $x0
 ...
 ---
+name:            extract_from_build_vector_shuffle_vector_undef
+alignment:       4
+liveins:
+  - { reg: '$x0' }
+  - { reg: '$x1' }
+frameInfo:
+  maxAlignment:    1
----------------
arsenm wrote:

Don't need any of this 

https://github.com/llvm/llvm-project/pull/90339