Support UnresolvedLookupExpr for PCH.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@106832 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/PCHReaderStmt.cpp b/lib/Frontend/PCHReaderStmt.cpp
index d12f3ea..fa2a451 100644
--- a/lib/Frontend/PCHReaderStmt.cpp
+++ b/lib/Frontend/PCHReaderStmt.cpp
@@ -143,6 +143,7 @@
 
     unsigned VisitOverloadExpr(OverloadExpr *E);
     unsigned VisitUnresolvedMemberExpr(UnresolvedMemberExpr *E);
+    unsigned VisitUnresolvedLookupExpr(UnresolvedLookupExpr *E);
   };
 }
 
@@ -1205,6 +1206,14 @@
   return 1;
 }
 
+unsigned PCHStmtReader::VisitUnresolvedLookupExpr(UnresolvedLookupExpr *E) {
+  VisitOverloadExpr(E);
+  E->setRequiresADL(Record[Idx++]);
+  E->setOverloaded(Record[Idx++]);
+  E->setNamingClass(cast_or_null<CXXRecordDecl>(Reader.GetDecl(Record[Idx++])));
+  return 0;
+}
+
 
 // Within the bitstream, expressions are stored in Reverse Polish
 // Notation, with each of the subexpressions preceding the
@@ -1602,6 +1611,11 @@
       S = UnresolvedMemberExpr::CreateEmpty(*Context,
                       /*NumTemplateArgs=*/Record[PCHStmtReader::NumExprFields]);
       break;
+      
+    case pch::EXPR_CXX_UNRESOLVED_LOOKUP:
+      S = UnresolvedLookupExpr::CreateEmpty(*Context,
+                      /*NumTemplateArgs=*/Record[PCHStmtReader::NumExprFields]);
+      break;
     }
 
     // We hit a STMT_STOP, so we're done with this expression.
diff --git a/lib/Frontend/PCHWriterStmt.cpp b/lib/Frontend/PCHWriterStmt.cpp
index ffddad6..ef109c3 100644
--- a/lib/Frontend/PCHWriterStmt.cpp
+++ b/lib/Frontend/PCHWriterStmt.cpp
@@ -138,6 +138,7 @@
 
     void VisitOverloadExpr(OverloadExpr *E);
     void VisitUnresolvedMemberExpr(UnresolvedMemberExpr *E);
+    void VisitUnresolvedLookupExpr(UnresolvedLookupExpr *E);
   };
 }
 
@@ -1108,6 +1109,14 @@
   Code = pch::EXPR_CXX_UNRESOLVED_MEMBER;
 }
 
+void PCHStmtWriter::VisitUnresolvedLookupExpr(UnresolvedLookupExpr *E) {
+  VisitOverloadExpr(E);
+  Record.push_back(E->requiresADL());
+  Record.push_back(E->isOverloaded());
+  Writer.AddDeclRef(E->getNamingClass(), Record);
+  Code = pch::EXPR_CXX_UNRESOLVED_LOOKUP;
+}
+
 //===----------------------------------------------------------------------===//
 // PCHWriter Implementation
 //===----------------------------------------------------------------------===//