[clang] [llvm] [Offload] Change unregister library to use `atexit` instead of destructor (PR #86830)

[Yaxun Liu via cfe-commits]

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@@ -186,57 +186,60 @@ GlobalVariable *createBinDesc(Module &M, ArrayRef<ArrayRef<char>> Bufs,
                             ".omp_offloading.descriptor" + Suffix);
 }
 
-void createRegisterFunction(Module &M, GlobalVariable *BinDesc,
-                            StringRef Suffix) {
+Function *createUnregisterFunction(Module &M, GlobalVariable *BinDesc,
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yxsamliu wrote:

It seems the order of createRegisterFunction and createUnregisterFunction is swapped. This causes some artificial differences. Is it OK to keep their original order.

https://github.com/llvm/llvm-project/pull/86830