[clang] [llvm] [openmp] [OpenMP][clang] Indirect and Virtual function call mapping from host to device (PR #159857)

[Alexey Bataev via cfe-commits]

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@@ -6824,6 +6824,26 @@ RValue CodeGenFunction::EmitCall(QualType CalleeType,
         Address(Handle, Handle->getType(), CGM.getPointerAlign()));
     Callee.setFunctionPointer(Stub);
   }
+
+  // Insert function pointer lookup if this is a target call
+  //
+  // This is used for the indirect function case, virtual function case is
+  // handled in ItaniumCXXABI.cpp
+  if (getLangOpts().OpenMPIsTargetDevice &&
+      getContext().OMPTargetCalls.contains(E)) {
+    auto *PtrTy = CGM.VoidPtrTy;
+    llvm::Type *RtlFnArgs[] = {PtrTy};
+    llvm::FunctionCallee DeviceRtlFn = CGM.CreateRuntimeFunction(
+        llvm::FunctionType::get(PtrTy, RtlFnArgs, false),
+        "__llvm_omp_indirect_call_lookup");
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alexey-bataev wrote:

Should this be __kmpc_omp_indirect_call_lookup?

https://github.com/llvm/llvm-project/pull/159857