From b67d7f0b6aba39b457ef716693508d617274c834 Mon Sep 17 00:00:00 2001
From: Dmitry Babokin <babokin@gmail.com>
Date: Fri, 25 Dec 2015 14:05:21 +0300
Subject: [PATCH] Move only unused declaration, the rest will be moved by
 Linker.

---
 builtins.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/builtins.cpp b/builtins.cpp
index 3ed1e6d7..d65882c1 100644
--- a/builtins.cpp
+++ b/builtins.cpp
@@ -906,6 +906,9 @@ AddBitcodeToModule(const unsigned char *bitcode, int length,
         // This trick should be legal, as both modules use the same LLVMContext.
         for (llvm::Function& f : *bcModule) {
           if (f.isDeclaration()) {
+            // Declarations with uses will be moved by Linker.
+            if (f.getNumUses() > 0)
+              continue;
             module->getOrInsertFunction(f.getName(), f.getFunctionType(),
                 f.getAttributes());
           }