[PATCH] D106315: [HIP] Preserve ASAN bitcode library functions

[Artem Belevich via Phabricator via cfe-commits]

tra added a comment.

In D106315#2899928 <https://reviews.llvm.org/D106315#2899928>, @yaxunl wrote:

> Yes that's possible. However that would require FE to know these functions and declare them, whereas the current approach leave the concern to the device library.

I was thinking of just adding a pointer to an array of pointers to `@llvm.compiler.used`.
The array itself would come from the bitcode library and would be populated there.  I'm not sure if it's doable without knowing the array size, though.

e.g

  ; Added by compiler
  @llvm.compiler.used = appending global [1 x i8*] [i8* bitcast ([16 x i8*]* @_ZL5funcs to i8*)], section "llvm.metadata"
  
  ; comes from the bitcode library, initialized with the pointers to functions you need to keep.
  @_ZL5funcs = internal global [16 x i8*] zeroinitializer, align 4

It should be possible to make the pointer to the array opaque with an intermadiate variable in the library.


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