From b555a767baf4a1058bc6e4e05acbbee9e55d0e26 Mon Sep 17 00:00:00 2001
From: Richard Smith <richard-llvm@metafoo.co.uk>
Date: Fri, 28 Sep 2012 22:46:07 +0000
Subject: PR13941: Mark all virtual functions as unnamed_addr. It's not
 possible to observe their addresses (taking their address gives the vtable
 slot) so we are free to merge their definitions.

llvm-svn: 164864
---
 clang/lib/CodeGen/CodeGenModule.cpp | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'clang/lib/CodeGen/CodeGenModule.cpp')

diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
index 164031a5038..d09c1c32606 100644
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -588,6 +588,10 @@ void CodeGenModule::SetLLVMFunctionAttributesForDefinition(const Decl *D,
   if (isa<CXXConstructorDecl>(D) || isa<CXXDestructorDecl>(D))
     F->setUnnamedAddr(true);
 
+  if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(D))
+    if (MD->isVirtual())
+      F->setUnnamedAddr(true);
+
   if (LangOpts.getStackProtector() == LangOptions::SSPOn)
     F->addFnAttr(llvm::Attribute::StackProtect);
   else if (LangOpts.getStackProtector() == LangOptions::SSPReq)
-- 
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