Modified ASTContext::getTagDeclType() to accept a NULL pointer for the passed

in TagDecl*. This allows the deserializer to use ASTContext to create the
TagTypes. Deserialize TagTypes then rely on pointer-backpatching to resolve
the decls.

This may not be the interface that we want, but as the implementation of
TagTypes will potentially change significantly in the future, I'm leaving this
for now. An appropriate FIXME is in place.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@44089 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/AST/ASTContext.cpp b/AST/ASTContext.cpp
index b844adf4318ba02d8aaadbb35b2b3dacb1dfbd9b..9d597bcc4306b3e79af0bab2982e81345ac01ee4 100644 (file)
--- a/AST/ASTContext.cpp
+++ b/AST/ASTContext.cpp
@@ -717,12 +717,19 @@ QualType ASTContext::getTypeOfType(QualType tofType) {
 /// getTagDeclType - Return the unique reference to the type for the
 /// specified TagDecl (struct/union/class/enum) decl.
 QualType ASTContext::getTagDeclType(TagDecl *Decl) {
+  // FIXME: This method currently accepts "Decl" to be NULL for use
+  //  by the deserializer.  This interface may wished to be changed
+  //  in the future.
+  
   // The decl stores the type cache.
-  if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0);
+  if (Decl && Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0);
   
-  Decl->TypeForDecl = new TagType(Decl, QualType());
-  Types.push_back(Decl->TypeForDecl);
-  return QualType(Decl->TypeForDecl, 0);
+  TagType* T = new TagType(Decl, QualType());
+  Types.push_back(T);
+  
+  if (Decl) Decl->TypeForDecl = T;
+
+  return QualType(T, 0);
 }
 
 /// getSizeType - Return the unique type for "size_t" (C99 7.17), the result