From 2fd1d7aee3cc168e0d9b78ca53fb2c1fc6684705 Mon Sep 17 00:00:00 2001
From: Richard Smith <richard-llvm@metafoo.co.uk>
Date: Fri, 19 Apr 2013 16:42:07 +0000
Subject: Implement CodeGen for C++11 thread_local, following the Itanium ABI
 specification as discussed on cxx-abi-dev.

llvm-svn: 179858
---
 clang/lib/CodeGen/CGExpr.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

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

diff --git a/clang/lib/CodeGen/CGExpr.cpp b/clang/lib/CodeGen/CGExpr.cpp
index 1c06b7d..a0725b5 100644
--- a/clang/lib/CodeGen/CGExpr.cpp
+++ b/clang/lib/CodeGen/CGExpr.cpp
@@ -1824,8 +1824,12 @@ LValue CodeGenFunction::EmitDeclRefLValue(const DeclRefExpr *E) {
 
   if (const VarDecl *VD = dyn_cast<VarDecl>(ND)) {
     // Check if this is a global variable.
-    if (VD->hasLinkage() || VD->isStaticDataMember())
+    if (VD->hasLinkage() || VD->isStaticDataMember()) {
+      // If it's thread_local, emit a call to its wrapper function instead.
+      if (VD->getTLSKind() == VarDecl::TLS_Dynamic)
+        return CGM.getCXXABI().EmitThreadLocalDeclRefExpr(*this, E);
       return EmitGlobalVarDeclLValue(*this, E, VD);
+    }
 
     bool isBlockVariable = VD->hasAttr<BlocksAttr>();
 
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