[PATCH] D100567: BPF: emit debuginfo for Function of DeclRefExpr if requested

[David Blaikie via Phabricator via cfe-commits]

dblaikie added a comment.

In D100567#2697415 <https://reviews.llvm.org/D100567#2697415>, @yonghong-song wrote:

> To answer one of your questions above, if there is a function definition before, dyn_cast<llvm::Function>(...) will return nullptr. I tried starting from "Value" class and found dyn_cast to llvm::ConstantExpr will result in a non-null object, but I did not trace down further with subclasses of llvm::ConstantExpr.

Might be worth understanding what's going on here before committing this patch, as it might not be the right direction.

(perhaps the right thing to do is to look at the AST expression rather than whatever IR entity is created for it?)


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