[clang] [Sema][CUDA][HIP] Report deferred diagnostics of force-emitted functions (PR #229008)

[Steffen Larsen via cfe-commits]

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@@ -21537,6 +21537,42 @@ Sema::FunctionEmissionStatus Sema::getEmissionStatus(const FunctionDecl *FD,
 
     if (IsEmittedForExternalSymbol())
       return FunctionEmissionStatus::Emitted;
+
+    // CodeGen also emits a function regardless of its uses if it is forced to,
+    // so its deferred diagnostics must not wait for a use.
+    auto IsForcedToBeEmitted = [this, FD, Final]() {
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steffenlarsen wrote:

I'll see what I can do!

https://github.com/llvm/llvm-project/pull/229008