diff --git a/clang/lib/CodeGen/CGBlocks.cpp b/clang/lib/CodeGen/CGBlocks.cpp
index f4f5f6f..1c10c46 100644
--- a/clang/lib/CodeGen/CGBlocks.cpp
+++ b/clang/lib/CodeGen/CGBlocks.cpp
@@ -2016,6 +2016,8 @@
   llvm::Function *Fn =
     llvm::Function::Create(LTy, llvm::GlobalValue::LinkOnceODRLinkage,
                            FuncName, &CGM.getModule());
+  if (CGM.supportsCOMDAT())
+    Fn->setComdat(CGM.getModule().getOrInsertComdat(FuncName));
 
   IdentifierInfo *II = &C.Idents.get(FuncName);
 
@@ -2207,6 +2209,8 @@
   llvm::Function *Fn =
     llvm::Function::Create(LTy, llvm::GlobalValue::LinkOnceODRLinkage,
                            FuncName, &CGM.getModule());
+  if (CGM.supportsCOMDAT())
+    Fn->setComdat(CGM.getModule().getOrInsertComdat(FuncName));
 
   IdentifierInfo *II = &C.Idents.get(FuncName);