[llvm] [AutoUpgrade] Upgrade old-style !tbaa.struct field tags (PR #225967)

[Antonio Frighetto via llvm-commits]

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@@ -0,0 +1,68 @@
+; Test that old-style scalar tags used as !tbaa.struct field tags in older
+; bitcode are auto-upgraded to the struct-path aware format on load, whatever
+; instruction carries the !tbaa.struct. Null and already struct-path field
+; tags are left unchanged; an immutability flag is kept.
+;
+; RUN: llvm-dis < %s.bc | FileCheck %s
+; RUN: verify-uselistorder < %s.bc
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antoniofrighetto wrote:

Nit: favor RUN lines before the comment (i.e., move them on top).

https://github.com/llvm/llvm-project/pull/225967