[llvm] [DebugInfo][NaryReassociate] Fix missing debug location updates (PR #92545)

[Shan Huang via llvm-commits]

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@@ -0,0 +1,88 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
+; RUN: opt < %s -passes=nary-reassociate -S | FileCheck %s
+
+; Test that NaryReassociate's tryReassociatedBinaryOp() propagates the
+; debug location to new `add` and `mul` from the original binary operator
+; they replaced (`%3` in both `@add_reassociate` and `@mul_reassociate`).
+; Because there are more than one identical binary operators in the optimized
+; program, autogenerated checks are used to check the whole program.
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Apochens wrote:

Would the revision be ok?

https://github.com/llvm/llvm-project/pull/92545