Merge pending instantiations instead of overwriting existing ones.

Check whether a pending instantiation needs to be instantiated (or whether an instantiation already exists).
Verify the size of the PendingInstantiations record (was only checking size of existing PendingInstantiations).

Migrate Obj-C++ part of redecl-merge into separate test, now that this is growing.
templates.mm: test that CodeGen has seen exactly one definition of template instantiations.
redecl-merge.m: use "@" specifier for expected-diagnostics.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@164993 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 5 insertions, 1 deletions

diff --git a/include/clang/Serialization/ASTReader.h b/include/clang/Serialization/ASTReader.h
index 51db35e4d9..e87c93fbec 100644
--- a/include/clang/Serialization/ASTReader.h
+++ b/include/clang/Serialization/ASTReader.h
@@ -687,7 +687,7 @@ private:
   /// Objective-C protocols.
   std::deque<Decl *> InterestingDecls;
 
-  /// \brief The set of redeclarable declaraations that have been deserialized
+  /// \brief The set of redeclarable declarations that have been deserialized
   /// since the last time the declaration chains were linked.
   llvm::SmallPtrSet<Decl *, 16> RedeclsDeserialized;
   
@@ -854,6 +854,10 @@ private:
 
   void finishPendingActions();
 
+  /// \brief Whether D needs to be instantiated, i.e. whether an instantiation
+  /// for D does not exist yet.
+  bool needPendingInstantiation(ValueDecl* D) const;
+
   /// \brief Produce an error diagnostic and return true.
   ///
   /// This routine should only be used for fatal errors that have to