Initial support for reading templates from PCH.

llvm-svn: 106392

1 files changed, 18 insertions, 10 deletions

diff --git a/clang/lib/AST/DeclTemplate.cpp b/clang/lib/AST/DeclTemplate.cpp
index 85b79600754..1fcf92309b7 100644
--- a/clang/lib/AST/DeclTemplate.cpp
+++ b/clang/lib/AST/DeclTemplate.cpp
@@ -155,23 +155,31 @@ ClassTemplateDecl *ClassTemplateDecl::getCanonicalDecl() {
   return Template;
 }
 
-ClassTemplateDecl *ClassTemplateDecl::Create(ASTContext &C,
-                                             DeclContext *DC,
-                                             SourceLocation L,
-                                             DeclarationName Name,
-                                             TemplateParameterList *Params,
-                                             NamedDecl *Decl,
-                                             ClassTemplateDecl *PrevDecl) {
-  Common *CommonPtr;
+void ClassTemplateDecl::initPreviousDeclaration(ASTContext &C,
+                                                ClassTemplateDecl *PrevDecl) {
+  assert(PreviousDeclaration == 0 && "PreviousDeclaration already set!");
+  assert(CommonPtr == 0 && "initPreviousDeclaration already called!");
+
+  PreviousDeclaration = PrevDecl;
+
   if (PrevDecl)
     CommonPtr = PrevDecl->CommonPtr;
   else {
     CommonPtr = new (C) Common;
     C.AddDeallocation(DeallocateCommon, CommonPtr);
   }
+}
 
-  return new (C) ClassTemplateDecl(DC, L, Name, Params, Decl, PrevDecl,
-                                   CommonPtr);
+ClassTemplateDecl *ClassTemplateDecl::Create(ASTContext &C,
+                                             DeclContext *DC,
+                                             SourceLocation L,
+                                             DeclarationName Name,
+                                             TemplateParameterList *Params,
+                                             NamedDecl *Decl,
+                                             ClassTemplateDecl *PrevDecl) {
+  ClassTemplateDecl *New = new (C) ClassTemplateDecl(DC, L, Name, Params, Decl);
+  New->initPreviousDeclaration(C, PrevDecl);
+  return New;
 }
 
 ClassTemplateDecl::~ClassTemplateDecl() {