[clang] Correctly link and optimize device libraries with -mlink-builtin-bitcode (PR #69371)

[Yaxun Liu via cfe-commits]

yxsamliu wrote:


> 
>  You could potentially link in all the symbols and internalize them

That probably won't work. After they are internalized, they have internal linkage and cannot be used to resolve newly added call of the same function.

The purpose of internalization is to allow you to optimize those functions, e.g. changing their signatures. After internalization, there is no guarantee they behave like the original functions.


https://github.com/llvm/llvm-project/pull/69371