[PATCH] D70258: [OpenMP][IR-Builder] Introduce the finalization stack

[Johannes Doerfert via Phabricator via llvm-commits]

jdoerfert marked an inline comment as done.
jdoerfert added inline comments.


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Comment at: llvm/include/llvm/Frontend/OpenMP/OMPIRBuilder.h:51
+  /// at the time, and location, the callback is invoked.
+  using FinalizeCallbackTy = std::function<void(InsertPointTy /* CodeGenIP */)>;
+
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ABataev wrote:
> jdoerfert wrote:
> > ABataev wrote:
> > > `llvm::function_ref`?
> > The lambda that is passed in here might go out of scope so we need to own it. This is intentional.
> Maybe better to save the intermediate data in CGOpenMPRuntime class rather than rely on owning lambda ref here? Clang does not use escaping decls and instead stores intermediate data explicitly. It really complicates analysis and potential source of resource leakage.
I don't follow. Clang does use `std::function` to store callbacks that have to life for a while. Why is this different? What would be the benefit of having a function_ref here and a `std::function` in CGOpenMPRuntime? Note that the FinaliztionInfo object is created in the front-end and the std::function is assigned there already.


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https://reviews.llvm.org/D70258