[llvm] [X86] Improve transform for add-like nodes to `add` (PR #83691)

[Simon Pilgrim via llvm-commits]

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@@ -1,3 +1,4 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 4
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RKSimon wrote:

regenerate as a precommit first

https://github.com/llvm/llvm-project/pull/83691