From f91cbd54c97fceaf84539e7234b27ad54bba735b Mon Sep 17 00:00:00 2001
From: Nick Lewycky <nicholas@mxc.ca>
Date: Thu, 10 Jan 2013 01:46:29 +0000
Subject: [PATCH] Don't assert in codegen on static data members which have
 NoLinkage. Fixes PR14825!

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172031 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/CGExpr.cpp               |  6 ++----
 test/CodeGenCXX/template-linkage.cpp | 20 ++++++++++++++++++++
 2 files changed, 22 insertions(+), 4 deletions(-)

diff --git a/lib/CodeGen/CGExpr.cpp b/lib/CodeGen/CGExpr.cpp
index e5f9672b0f..c002bb1432 100644
--- a/lib/CodeGen/CGExpr.cpp
+++ b/lib/CodeGen/CGExpr.cpp
@@ -1583,8 +1583,6 @@ EmitBitCastOfLValueToProperType(CodeGenFunction &CGF,
 
 static LValue EmitGlobalVarDeclLValue(CodeGenFunction &CGF,
                                       const Expr *E, const VarDecl *VD) {
-  assert(VD->hasLinkage() && "Var decl must have linkage!");
-
   llvm::Value *V = CGF.CGM.GetAddrOfGlobalVar(VD);
   llvm::Type *RealVarTy = CGF.getTypes().ConvertTypeForMem(VD->getType());
   V = EmitBitCastOfLValueToProperType(CGF, V, RealVarTy);
@@ -1657,7 +1655,7 @@ LValue CodeGenFunction::EmitDeclRefLValue(const DeclRefExpr *E) {
 
   if (const VarDecl *VD = dyn_cast<VarDecl>(ND)) {
     // Check if this is a global variable.
-    if (VD->hasLinkage())
+    if (VD->hasLinkage() || VD->isStaticDataMember())
       return EmitGlobalVarDeclLValue(*this, E, VD);
 
     bool isBlockVariable = VD->hasAttr<BlocksAttr>();
@@ -1666,7 +1664,7 @@ LValue CodeGenFunction::EmitDeclRefLValue(const DeclRefExpr *E) {
                      !VD->getType()->isReferenceType() &&
                      !isBlockVariable;
 
-    llvm::Value *V = LocalDeclMap[VD];
+    llvm::Value *V = LocalDeclMap.lookup(VD);
     if (!V && VD->isStaticLocal()) 
       V = CGM.getStaticLocalDeclAddress(VD);
 
diff --git a/test/CodeGenCXX/template-linkage.cpp b/test/CodeGenCXX/template-linkage.cpp
index 20508c1596..3acd12ef0b 100644
--- a/test/CodeGenCXX/template-linkage.cpp
+++ b/test/CodeGenCXX/template-linkage.cpp
@@ -1,4 +1,7 @@
 // RUN: %clang_cc1 %s -triple=x86_64-apple-darwin10 -emit-llvm -o - | FileCheck %s
+
+// CHECK: Outer5Inner{{.*}}localE6memberE = external global
+
 template<typename T> struct A {
   virtual void f(T) { }
   inline void g() { } 
@@ -42,3 +45,20 @@ void test_X1() {
   X1<char> i1c;
 }
 
+namespace PR14825 {
+struct Outer {
+  template <typename T> struct Inner {
+    static int member;
+  };
+  template <typename T> void Get() {
+    int m = Inner<T>::member;
+  }
+};
+
+void test() {
+  struct local {};
+  Outer o;
+  typedef void (Outer::*mptr)();
+  mptr method = &Outer::Get<local>;
+}
+}
-- 
2.40.0