[llvm] [AA] Support Running Target Specific AA before BasicAA (PR #125965)

[via llvm-commits]

================
@@ -987,11 +987,13 @@ struct ExternalAAWrapperPass : ImmutablePass {
 
   CallbackT CB;
 
+  bool Early; // Run before BasicAA or not
----------------
Chengjunp wrote:

Thank you for your review! I'm not sure how other backends will be influenced by making the target-specific AA early. If all the reviewers agree on making target-specific AA early, I will just move it before basic AA. In that case, the change should be much simpler.

https://github.com/llvm/llvm-project/pull/125965