From cdb8b3f7ec3f3ab8e1b3db8da384f2444492e5b3 Mon Sep 17 00:00:00 2001
From: Argyrios Kyrtzidis <akyrtzi@gmail.com>
Date: Sun, 4 Jul 2010 21:44:00 +0000
Subject: [PATCH] Read/write specialization info of static data members for
 PCH.

llvm-svn: 107593
---
 clang/include/clang/AST/ASTContext.h   |  3 ++-
 clang/include/clang/AST/DeclTemplate.h |  5 +++--
 clang/lib/AST/ASTContext.cpp           |  5 +++--
 clang/lib/Frontend/PCHReaderDecl.cpp   |  7 +++++++
 clang/lib/Frontend/PCHWriterDecl.cpp   | 13 +++++++++++++
 5 files changed, 28 insertions(+), 5 deletions(-)

diff --git a/clang/include/clang/AST/ASTContext.h b/clang/include/clang/AST/ASTContext.h
index 2b65f3155ea1..0a6b6cd45e66 100644
--- a/clang/include/clang/AST/ASTContext.h
+++ b/clang/include/clang/AST/ASTContext.h
@@ -331,7 +331,8 @@ public:
   /// \brief Note that the static data member \p Inst is an instantiation of
   /// the static data member template \p Tmpl of a class template.
   void setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl,
-                                           TemplateSpecializationKind TSK);
+                                           TemplateSpecializationKind TSK,
+                        SourceLocation PointOfInstantiation = SourceLocation());
 
   /// \brief If the given using decl is an instantiation of a
   /// (possibly unresolved) using decl from a template instantiation,
diff --git a/clang/include/clang/AST/DeclTemplate.h b/clang/include/clang/AST/DeclTemplate.h
index 84e755302af4..9e6cf0c38fa9 100644
--- a/clang/include/clang/AST/DeclTemplate.h
+++ b/clang/include/clang/AST/DeclTemplate.h
@@ -379,8 +379,9 @@ class MemberSpecializationInfo {
   
 public:
   explicit 
-  MemberSpecializationInfo(NamedDecl *IF, TemplateSpecializationKind TSK)
-    : MemberAndTSK(IF, TSK - 1), PointOfInstantiation() {
+  MemberSpecializationInfo(NamedDecl *IF, TemplateSpecializationKind TSK,
+                           SourceLocation POI = SourceLocation())
+    : MemberAndTSK(IF, TSK - 1), PointOfInstantiation(POI) {
     assert(TSK != TSK_Undeclared && 
            "Cannot encode undeclared template specializations for members");
   }
diff --git a/clang/lib/AST/ASTContext.cpp b/clang/lib/AST/ASTContext.cpp
index 2d52bd08d557..f8f568cbb489 100644
--- a/clang/lib/AST/ASTContext.cpp
+++ b/clang/lib/AST/ASTContext.cpp
@@ -392,13 +392,14 @@ ASTContext::getInstantiatedFromStaticDataMember(const VarDecl *Var) {
 
 void
 ASTContext::setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl,
-                                                TemplateSpecializationKind TSK) {
+                                                TemplateSpecializationKind TSK,
+                                          SourceLocation PointOfInstantiation) {
   assert(Inst->isStaticDataMember() && "Not a static data member");
   assert(Tmpl->isStaticDataMember() && "Not a static data member");
   assert(!InstantiatedFromStaticDataMember[Inst] &&
          "Already noted what static data member was instantiated from");
   InstantiatedFromStaticDataMember[Inst] 
-    = new (*this) MemberSpecializationInfo(Tmpl, TSK);
+    = new (*this) MemberSpecializationInfo(Tmpl, TSK, PointOfInstantiation);
 }
 
 NamedDecl *
diff --git a/clang/lib/Frontend/PCHReaderDecl.cpp b/clang/lib/Frontend/PCHReaderDecl.cpp
index 9de002b0e6e6..ab7485ce7947 100644
--- a/clang/lib/Frontend/PCHReaderDecl.cpp
+++ b/clang/lib/Frontend/PCHReaderDecl.cpp
@@ -522,6 +522,13 @@ void PCHDeclReader::VisitVarDecl(VarDecl *VD) {
                          cast_or_null<VarDecl>(Reader.GetDecl(Record[Idx++])));
   if (Record[Idx++])
     VD->setInit(Reader.ReadExpr());
+
+  if (Record[Idx++]) { // HasMemberSpecializationInfo.
+    VarDecl *Tmpl = cast<VarDecl>(Reader.GetDecl(Record[Idx++]));
+    TemplateSpecializationKind TSK = (TemplateSpecializationKind)Record[Idx++];
+    SourceLocation POI = Reader.ReadSourceLocation(Record, Idx);
+    Reader.getContext()->setInstantiatedFromStaticDataMember(VD, Tmpl, TSK,POI);
+  }
 }
 
 void PCHDeclReader::VisitImplicitParamDecl(ImplicitParamDecl *PD) {
diff --git a/clang/lib/Frontend/PCHWriterDecl.cpp b/clang/lib/Frontend/PCHWriterDecl.cpp
index 2383a75bd040..f52302336574 100644
--- a/clang/lib/Frontend/PCHWriterDecl.cpp
+++ b/clang/lib/Frontend/PCHWriterDecl.cpp
@@ -492,6 +492,16 @@ void PCHDeclWriter::VisitVarDecl(VarDecl *D) {
   Record.push_back(D->getInit() ? 1 : 0);
   if (D->getInit())
     Writer.AddStmt(D->getInit());
+
+  MemberSpecializationInfo *SpecInfo
+    = D->isStaticDataMember() ? D->getMemberSpecializationInfo() : 0;
+  Record.push_back(SpecInfo != 0);
+  if (SpecInfo) {
+    Writer.AddDeclRef(SpecInfo->getInstantiatedFrom(), Record);
+    Record.push_back(SpecInfo->getTemplateSpecializationKind());
+    Writer.AddSourceLocation(SpecInfo->getPointOfInstantiation(), Record);
+  }
+
   Code = pch::DECL_VAR;
 }
 
@@ -530,6 +540,8 @@ void PCHDeclWriter::VisitParmVarDecl(ParmVarDecl *D) {
   assert(!D->isDeclaredInCondition() && "PARM_VAR_DECL can't be in condition");
   assert(!D->isExceptionVariable() && "PARM_VAR_DECL can't be exception var");
   assert(D->getPreviousDeclaration() == 0 && "PARM_VAR_DECL can't be redecl");
+  assert(!D->isStaticDataMember() &&
+         "PARM_VAR_DECL can't be static data member");
 }
 
 void PCHDeclWriter::VisitFileScopeAsmDecl(FileScopeAsmDecl *D) {
@@ -974,6 +986,7 @@ void PCHWriter::WriteDeclsBlockAbbrevs() {
   Abv->Add(BitCodeAbbrevOp(0));                       // isNRVOVariable
   Abv->Add(BitCodeAbbrevOp(0));                       // PrevDecl
   Abv->Add(BitCodeAbbrevOp(0));                       // HasInit
+  Abv->Add(BitCodeAbbrevOp(0));                   // HasMemberSpecializationInfo
   // ParmVarDecl
   Abv->Add(BitCodeAbbrevOp(0));                       // ObjCDeclQualifier
   Abv->Add(BitCodeAbbrevOp(0));                       // HasInheritedDefaultArg