From 4e004ed124bb2a85d285c38bcd44aa4b5ee20e7c Mon Sep 17 00:00:00 2001
From: Daniel Dunbar <daniel@zuster.org>
Date: Thu, 19 Mar 2009 08:27:24 +0000
Subject: IRgen support for alias of global variable.  - PR3818.

llvm-svn: 67297
---
 clang/lib/CodeGen/CodeGenModule.cpp | 20 +++++++++-----------
 1 file changed, 9 insertions(+), 11 deletions(-)

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

diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
index aed067617eb..cc460c59593 100644
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -369,7 +369,7 @@ void CodeGenModule::SetFunctionAttributes(const FunctionDecl *FD,
 
 void CodeGenModule::EmitAliases() {
   for (unsigned i = 0, e = Aliases.size(); i != e; ++i) {
-    const FunctionDecl *D = Aliases[i];
+    const ValueDecl *D = Aliases[i];
     const AliasAttr *AA = D->getAttr<AliasAttr>();
 
     // This is something of a hack, if the FunctionDecl got overridden
@@ -380,7 +380,7 @@ void CodeGenModule::EmitAliases() {
       continue;
 
     const std::string& aliaseeName = AA->getAliasee();
-    llvm::Function *aliasee = getModule().getFunction(aliaseeName);
+    llvm::GlobalValue *aliasee = getModule().getNamedValue(aliaseeName);
     if (!aliasee) {
       // FIXME: This isn't unsupported, this is just an error, which
       // sema should catch, but...
@@ -539,16 +539,14 @@ bool CodeGenModule::MayDeferGeneration(const ValueDecl *Global) {
 }
 
 void CodeGenModule::EmitGlobal(const ValueDecl *Global) {
-  if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Global)) {
-    // Aliases are deferred until code for everything else has been
-    // emitted.
-    if (FD->getAttr<AliasAttr>()) {
-      assert(!FD->isThisDeclarationADefinition() && 
-             "Function alias cannot have a definition!");
-      Aliases.push_back(FD);
-      return;
-    }
+  // Aliases are deferred until code for everything else has been
+  // emitted.
+  if (Global->getAttr<AliasAttr>()) {
+    Aliases.push_back(Global);
+    return;
+  }
 
+  if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Global)) {
     // Forward declarations are emitted lazily on first use.
     if (!FD->isThisDeclarationADefinition())
       return;
-- 
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