[Serialization] Serialize DependentSizedExtVectorType

[arphaman]

Summary

DependentSizedExtVectorType should be supported by the serialization library

[bruno]

LGTM Alex, thanks!

cfe/trunk/include/clang/Serialization/ASTBitCodes.h

enum TypeCode {
       TYPE_DECAYED               = 41,
       /// \brief An AdjustedType record.
       TYPE_ADJUSTED              = 42,
       /// \brief A PipeType record.
       TYPE_PIPE                  = 43,
       /// \brief An ObjCTypeParamType record.
       TYPE_OBJC_TYPE_PARAM       = 44,
       /// \brief A DeducedTemplateSpecializationType record.
-      TYPE_DEDUCED_TEMPLATE_SPECIALIZATION = 45
+      TYPE_DEDUCED_TEMPLATE_SPECIALIZATION = 45,
+      /// \brief A DependentSizedExtVectorType record.
+      TYPE_DEPENDENT_SIZED_EXT_VECTOR = 46
     };
 
     /// \brief The type IDs for special types constructed by semantic
     /// analysis.
     ///
     /// The constants in this enumeration are indices into the
     /// SPECIAL_TYPES record.
     enum SpecialTypeIDs {

cfe/trunk/lib/Serialization/ASTReader.cpp

case TYPE_PIPE: {
     }
 
     // Reading the pipe element type.
     QualType ElementType = readType(*Loc.F, Record, Idx);
     unsigned ReadOnly = Record[1];
     return Context.getPipeType(ElementType, ReadOnly);
   }
 
+  case TYPE_DEPENDENT_SIZED_EXT_VECTOR: {
+    unsigned Idx = 0;
+
+    // DependentSizedExtVectorType
+    QualType ElementType = readType(*Loc.F, Record, Idx);
+    Expr *SizeExpr = ReadExpr(*Loc.F);
+    SourceLocation AttrLoc = ReadSourceLocation(*Loc.F, Record, Idx);
+
+    return Context.getDependentSizedExtVectorType(ElementType, SizeExpr,
+                                                  AttrLoc);
+  }
   }
   llvm_unreachable("Invalid TypeCode!");
 }
 
 void ASTReader::readExceptionSpec(ModuleFile &ModuleFile,
                                   SmallVectorImpl<QualType> &Exceptions,
                                   FunctionProtoType::ExceptionSpecInfo &ESI,
                                   const RecordData &Record, unsigned &Idx) {

cfe/trunk/lib/Serialization/ASTWriter.cpp

ASTTypeWriter::VisitDependentSizedArrayType(const DependentSizedArrayType *T) {
   Record.AddStmt(T->getSizeExpr());
   Record.AddSourceRange(T->getBracketsRange());
   Code = TYPE_DEPENDENT_SIZED_ARRAY;
 }
 
 void
 ASTTypeWriter::VisitDependentSizedExtVectorType(
                                         const DependentSizedExtVectorType *T) {
-  // FIXME: Serialize this type (C++ only)
-  llvm_unreachable("Cannot serialize dependent sized extended vector types");
+  Record.AddTypeRef(T->getElementType());
+  Record.AddStmt(T->getSizeExpr());
+  Record.AddSourceLocation(T->getAttributeLoc());
+  Code = TYPE_DEPENDENT_SIZED_EXT_VECTOR;
 }
 
 void
 ASTTypeWriter::VisitTemplateTypeParmType(const TemplateTypeParmType *T) {
   Record.push_back(T->getDepth());
   Record.push_back(T->getIndex());
   Record.push_back(T->isParameterPack());
   Record.AddDeclRef(T->getDecl());

cfe/trunk/test/PCH/cxx-dependent-sized-ext-vector.cpp

+// RUN: %clang_cc1 -std=c++11 -emit-pch %s -o %t
+// RUN: %clang_cc1 -std=c++11 -include-pch %t -verify %s
+
+#ifndef HEADER_INCLUDED
+
+#define HEADER_INCLUDED
+
+template<typename T, int N>
+using vec = T __attribute__((ext_vector_type(N)));
+
+#else
+
+void test() {
+  vec<float, 2> a;  // expected-error@-5 {{zero vector size}}
+  vec<float, 0> b; // expected-note {{in instantiation of template type alias 'vec' requested here}}
+}
+
+#endif