From 6db85518665b19cdbb9a6ef342b0f6ffca9ce808 Mon Sep 17 00:00:00 2001
From: Peter Goodman <peter@trailofbits.com>
Date: Sun, 21 Feb 2021 23:56:24 -0500
Subject: [PATCH] Tweak moving into modules to not die when the target function
 is non-empty (#490)

---
 lib/BC/Util.cpp | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/lib/BC/Util.cpp b/lib/BC/Util.cpp
index d3e64e921..052e3f230 100644
--- a/lib/BC/Util.cpp
+++ b/lib/BC/Util.cpp
@@ -1527,9 +1527,6 @@ void MoveFunctionIntoModule(llvm::Function *func, llvm::Module *dest_module) {
     CHECK_NE(existing_decl_in_dest_module, func);
     CHECK_EQ(existing_decl_in_dest_module->getFunctionType(),
              func->getFunctionType());
-    CHECK(existing_decl_in_dest_module->isDeclaration())
-        << "Function " << func->getName().str()
-        << " already exists in destination module.";
 
     existing_decl_in_dest_module->setName(llvm::Twine::createNull());
     existing_decl_in_dest_module->setLinkage(llvm::GlobalValue::PrivateLinkage);