From d46f98573ba104eda102dd3224b2dca69f1c6336 Mon Sep 17 00:00:00 2001
From: John McCall <rjmccall@apple.com>
Date: Fri, 19 Feb 2010 01:32:20 +0000
Subject: Re-introduce the ctor/dtor alias optimization, this time hidden
 behind a command-line option which defaults off.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@96649 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/CodeGenModule.h | 26 ++++++++++++++++++++++----
 1 file changed, 22 insertions(+), 4 deletions(-)

(limited to 'lib/CodeGen/CodeGenModule.h')

diff --git a/lib/CodeGen/CodeGenModule.h b/lib/CodeGen/CodeGenModule.h
index 8280766c70..a5e1d9f12b 100644
--- a/lib/CodeGen/CodeGenModule.h
+++ b/lib/CodeGen/CodeGenModule.h
@@ -206,6 +206,19 @@ public:
   /// GlobalValue.
   void setGlobalVisibility(llvm::GlobalValue *GV, const Decl *D) const;
 
+  llvm::Constant *GetAddrOfGlobal(GlobalDecl GD) {
+    if (isa<CXXConstructorDecl>(GD.getDecl()))
+      return GetAddrOfCXXConstructor(cast<CXXConstructorDecl>(GD.getDecl()),
+                                     GD.getCtorType());
+    else if (isa<CXXDestructorDecl>(GD.getDecl()))
+      return GetAddrOfCXXDestructor(cast<CXXDestructorDecl>(GD.getDecl()),
+                                     GD.getDtorType());
+    else if (isa<FunctionDecl>(GD.getDecl()))
+      return GetAddrOfFunction(GD);
+    else
+      return GetAddrOfGlobalVar(cast<VarDecl>(GD.getDecl()));
+  }
+
   /// GetAddrOfGlobalVar - Return the llvm::Constant for the address of the
   /// given global variable.  If Ty is non-null and if the global doesn't exist,
   /// then it will be greated with the specified type instead of whatever the
@@ -291,13 +304,13 @@ public:
 
   /// GetAddrOfCXXConstructor - Return the address of the constructor of the
   /// given type.
-  llvm::Function *GetAddrOfCXXConstructor(const CXXConstructorDecl *D,
-                                          CXXCtorType Type);
+  llvm::GlobalValue *GetAddrOfCXXConstructor(const CXXConstructorDecl *D,
+                                             CXXCtorType Type);
 
   /// GetAddrOfCXXDestructor - Return the address of the constructor of the
   /// given type.
-  llvm::Function *GetAddrOfCXXDestructor(const CXXDestructorDecl *D,
-                                         CXXDtorType Type);
+  llvm::GlobalValue *GetAddrOfCXXDestructor(const CXXDestructorDecl *D,
+                                            CXXDtorType Type);
 
   /// getBuiltinLibFunction - Given a builtin id for a function like
   /// "__builtin_fabsf", return a Function* for "fabsf".
@@ -417,6 +430,9 @@ public:
     GVA_TemplateInstantiation
   };
 
+  llvm::GlobalVariable::LinkageTypes
+  getFunctionLinkage(const FunctionDecl *FD);
+
   /// getVtableLinkage - Return the appropriate linkage for the vtable, VTT,
   /// and type information of the given class.
   static llvm::GlobalVariable::LinkageTypes 
@@ -468,6 +484,8 @@ private:
 
   // C++ related functions.
 
+  bool TryEmitDefinitionAsAlias(GlobalDecl Alias, GlobalDecl Target);
+
   void EmitNamespace(const NamespaceDecl *D);
   void EmitLinkageSpec(const LinkageSpecDecl *D);
 
-- 
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