[llvm] [DebugInfo][MemCpyOpt] Update assignment IDs during call-slot forwarding (PR #224244)

[Orlando Cazalet-Hyams via llvm-commits]

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@@ -0,0 +1,58 @@
+; RUN: opt -passes=memcpyopt -S %s | FileCheck %s
+
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OCHyams wrote:

Please can you add a comment explaining the purpose of the test

https://github.com/llvm/llvm-project/pull/224244