[llvm] [LLVM] Create `lf_alias` nodes for `typedef` and `using` (PR #153936)

[Alexandre Ganea via llvm-commits]

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@@ -0,0 +1,14 @@
+// Build with clang -fno-rtti -g -O0 typedef.cpp
+// Built with clang (22+) because MSVC does not output lf_alias for typedefs
+
+void *__purecall = 0;
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aganea wrote:

Please remove this file, and then you could write - as comments - a minimal version in typedef.test below, including the explict steps to generate the input, as suggested above. There's two parts to this: testing the serialization like you do below; and testing the lowering from IR/.asm as I suggested.

https://github.com/llvm/llvm-project/pull/153936