Add a new expression kind, OpaqueValueExpr, which is useful for

certain internal type-checking procedures as well as for representing
certain implicitly-generated operations.  Uses to follow.

llvm-svn: 119289

2 files changed, 19 insertions, 0 deletions

diff --git a/clang/lib/Serialization/ASTReaderStmt.cpp b/clang/lib/Serialization/ASTReaderStmt.cpp
index 41386dcafa3..26077c5fb74 100644
--- a/clang/lib/Serialization/ASTReaderStmt.cpp
+++ b/clang/lib/Serialization/ASTReaderStmt.cpp
@@ -178,6 +178,8 @@ namespace clang {
 
     void VisitUnaryTypeTraitExpr(UnaryTypeTraitExpr *E);
     void VisitCXXNoexceptExpr(CXXNoexceptExpr *E);
+
+    void VisitOpaqueValueExpr(OpaqueValueExpr *E);
   };
 }
 
@@ -1280,6 +1282,11 @@ void ASTStmtReader::VisitCXXNoexceptExpr(CXXNoexceptExpr *E) {
   E->Operand = Reader.ReadSubExpr();
 }
 
+void ASTStmtReader::VisitOpaqueValueExpr(OpaqueValueExpr *E) {
+  VisitExpr(E);
+  E->setValueKind(static_cast<ExprValueKind>(Record[Idx++]));
+}
+
 Stmt *ASTReader::ReadStmt(PerFileData &F) {
   switch (ReadingKind) {
   case Read_Decl:
@@ -1795,6 +1802,10 @@ Stmt *ASTReader::ReadStmtFromStream(PerFileData &F) {
     case EXPR_CXX_NOEXCEPT:
       S = new (Context) CXXNoexceptExpr(Empty);
       break;
+
+    case EXPR_OPAQUE_VALUE:
+      S = new (Context) OpaqueValueExpr(Empty);
+      break;
     }
     
     // We hit a STMT_STOP, so we're done with this expression.
diff --git a/clang/lib/Serialization/ASTWriterStmt.cpp b/clang/lib/Serialization/ASTWriterStmt.cpp
index fc8e9e0e595..efbfd944017 100644
--- a/clang/lib/Serialization/ASTWriterStmt.cpp
+++ b/clang/lib/Serialization/ASTWriterStmt.cpp
@@ -152,6 +152,8 @@ namespace clang {
 
     void VisitUnaryTypeTraitExpr(UnaryTypeTraitExpr *E);
     void VisitCXXNoexceptExpr(CXXNoexceptExpr *E);
+
+    void VisitOpaqueValueExpr(OpaqueValueExpr *E);
   };
 }
 
@@ -1293,6 +1295,12 @@ void ASTStmtWriter::VisitCXXNoexceptExpr(CXXNoexceptExpr *E) {
   Code = serialization::EXPR_CXX_NOEXCEPT;
 }
 
+void ASTStmtWriter::VisitOpaqueValueExpr(OpaqueValueExpr *E) {
+  VisitExpr(E);
+  Record.push_back(E->getValueKind());
+  Code = serialization::EXPR_OPAQUE_VALUE;
+}
+
 //===----------------------------------------------------------------------===//
 // ASTWriter Implementation
 //===----------------------------------------------------------------------===//