Simplify checking of explicit template specialization/explicit

instantiation redeclaration semantics for function template
specializations and member functions of class template
specializations. Also, record the point of instantiation for
explicit-instantiated functions and static data members.

llvm-svn: 84188

1 files changed, 32 insertions, 6 deletions

diff --git a/clang/lib/AST/Decl.cpp b/clang/lib/AST/Decl.cpp
index da7959b16f9..9d7d3d087cc 100644
--- a/clang/lib/AST/Decl.cpp
+++ b/clang/lib/AST/Decl.cpp
@@ -408,10 +408,15 @@ MemberSpecializationInfo *VarDecl::getMemberSpecializationInfo() const {
   return getASTContext().getInstantiatedFromStaticDataMember(this);
 }
 
-void VarDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK) {
+void VarDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK,
+                                         SourceLocation PointOfInstantiation) {
   MemberSpecializationInfo *MSI = getMemberSpecializationInfo();
   assert(MSI && "Not an instantiated static data member?");
   MSI->setTemplateSpecializationKind(TSK);
+  if (TSK != TSK_ExplicitSpecialization &&
+      PointOfInstantiation.isValid() &&
+      MSI->getPointOfInstantiation().isInvalid())
+    MSI->setPointOfInstantiation(PointOfInstantiation);
 }
 
 bool VarDecl::isTentativeDefinition(ASTContext &Context) const {
@@ -812,18 +817,39 @@ TemplateSpecializationKind FunctionDecl::getTemplateSpecializationKind() const {
 }
 
 void
-FunctionDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK) {
+FunctionDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK,
+                                          SourceLocation PointOfInstantiation) {
   if (FunctionTemplateSpecializationInfo *FTSInfo
         = TemplateOrSpecialization.dyn_cast<
-                                        FunctionTemplateSpecializationInfo*>())
+                                    FunctionTemplateSpecializationInfo*>()) {
     FTSInfo->setTemplateSpecializationKind(TSK);
-  else if (MemberSpecializationInfo *MSInfo
-             = TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo*>())
+    if (TSK != TSK_ExplicitSpecialization &&
+        PointOfInstantiation.isValid() &&
+        FTSInfo->getPointOfInstantiation().isInvalid())
+      FTSInfo->setPointOfInstantiation(PointOfInstantiation);
+  } else if (MemberSpecializationInfo *MSInfo
+             = TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo*>()) {
     MSInfo->setTemplateSpecializationKind(TSK);
-  else
+    if (TSK != TSK_ExplicitSpecialization &&
+        PointOfInstantiation.isValid() &&
+        MSInfo->getPointOfInstantiation().isInvalid())
+      MSInfo->setPointOfInstantiation(PointOfInstantiation);
+  } else
     assert(false && "Function cannot have a template specialization kind");
 }
 
+SourceLocation FunctionDecl::getPointOfInstantiation() const {
+  if (FunctionTemplateSpecializationInfo *FTSInfo
+        = TemplateOrSpecialization.dyn_cast<
+                                        FunctionTemplateSpecializationInfo*>())
+    return FTSInfo->getPointOfInstantiation();
+  else if (MemberSpecializationInfo *MSInfo
+             = TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo*>())
+    return MSInfo->getPointOfInstantiation();
+  
+  return SourceLocation();
+}
+
 bool FunctionDecl::isOutOfLine() const {
   if (Decl::isOutOfLine())
     return true;