[RuntimeDyld] Add comment documenting the behavior change in r241383.

llvm-svn: 241408

1 files changed, 4 insertions, 0 deletions

diff --git a/llvm/include/llvm/ExecutionEngine/RuntimeDyld.h b/llvm/include/llvm/ExecutionEngine/RuntimeDyld.h
index 94c4038e818..a808d923116 100644
--- a/llvm/include/llvm/ExecutionEngine/RuntimeDyld.h
+++ b/llvm/include/llvm/ExecutionEngine/RuntimeDyld.h
@@ -153,6 +153,10 @@ public:
 
     /// This method returns the address of the specified function or variable.
     /// It is used to resolve symbols during module linking.
+    ///
+    /// If the returned symbol's address is equal to ~0ULL then RuntimeDyld will
+    /// skip all relocations for that symbol, and the client will be responsible
+    /// for handling them manually.
     virtual SymbolInfo findSymbol(const std::string &Name) = 0;
 
     /// This method returns the address of the specified symbol if it exists