From 4ebdf5c4f587daef4e0be499802eac3a7a49bf2f Mon Sep 17 00:00:00 2001
From: Ed Schouten <ed@FreeBSD.org>
Date: Sat, 27 Jun 2009 10:45:02 +0000
Subject: Import Clang r74383.

---
 lib/AST/Decl.cpp | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)

(limited to 'lib/AST/Decl.cpp')

diff --git a/lib/AST/Decl.cpp b/lib/AST/Decl.cpp
index 71e88a9efc49..5382ab52ab5b 100644
--- a/lib/AST/Decl.cpp
+++ b/lib/AST/Decl.cpp
@@ -269,6 +269,14 @@ bool NamedDecl::declarationReplaces(NamedDecl *OldD) const {
     // For function declarations, we keep track of redeclarations.
     return FD->getPreviousDeclaration() == OldD;
 
+  // For function templates, the underlying function declarations are linked.
+  if (const FunctionTemplateDecl *FunctionTemplate
+        = dyn_cast<FunctionTemplateDecl>(this))
+    if (const FunctionTemplateDecl *OldFunctionTemplate
+          = dyn_cast<FunctionTemplateDecl>(OldD))
+      return FunctionTemplate->getTemplatedDecl()
+               ->declarationReplaces(OldFunctionTemplate->getTemplatedDecl());
+  
   // For method declarations, we keep track of redeclarations.
   if (isa<ObjCMethodDecl>(this))
     return false;
@@ -289,6 +297,19 @@ bool NamedDecl::hasLinkage() const {
   return false;
 }
 
+NamedDecl *NamedDecl::getUnderlyingDecl() {
+  NamedDecl *ND = this;
+  while (true) {
+    if (UsingDecl *UD = dyn_cast<UsingDecl>(ND))
+      ND = UD->getTargetDecl();
+    else if (ObjCCompatibleAliasDecl *AD
+              = dyn_cast<ObjCCompatibleAliasDecl>(ND))
+      return AD->getClassInterface();
+    else
+      return ND;
+  }
+}
+
 //===----------------------------------------------------------------------===//
 // VarDecl Implementation
 //===----------------------------------------------------------------------===//
@@ -351,6 +372,10 @@ void FunctionDecl::Destroy(ASTContext& C) {
 
   C.Deallocate(ParamInfo);
 
+  if (TemplateSpecializationInfo *Info 
+        = TemplateOrSpecialization.dyn_cast<TemplateSpecializationInfo*>())
+    C.Deallocate(Info);
+  
   Decl::Destroy(C);
 }
 
@@ -547,6 +572,20 @@ OverloadedOperatorKind FunctionDecl::getOverloadedOperator() const {
     return OO_None;
 }
 
+void 
+FunctionDecl::setFunctionTemplateSpecialization(ASTContext &Context,
+                                                FunctionTemplateDecl *Template,
+                                     const TemplateArgumentList *TemplateArgs) {
+  TemplateSpecializationInfo *Info 
+    = TemplateOrSpecialization.dyn_cast<TemplateSpecializationInfo*>();
+  if (!Info)
+    Info = new (Context) TemplateSpecializationInfo;
+  
+  Info->Template = Template;
+  Info->TemplateArguments = TemplateArgs;
+  TemplateOrSpecialization = Info;
+}
+
 //===----------------------------------------------------------------------===//
 // TagDecl Implementation
 //===----------------------------------------------------------------------===//
-- 
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