1 files changed, 43 insertions, 4 deletions

diff --git a/clang/lib/Serialization/ASTReaderStmt.cpp b/clang/lib/Serialization/ASTReaderStmt.cpp
index 2de0b58fa4a..3d6b8acedac 100644
--- a/clang/lib/Serialization/ASTReaderStmt.cpp
+++ b/clang/lib/Serialization/ASTReaderStmt.cpp
@@ -1861,9 +1861,15 @@ OMPClause *OMPClauseReader::readClause() {
   case OMPC_device:
     C = new (Context) OMPDeviceClause();
     break;
-  case OMPC_map:
-    C = OMPMapClause::CreateEmpty(Context, Record[Idx++]);
+  case OMPC_map: {
+    unsigned NumVars = Record[Idx++];
+    unsigned NumDeclarations = Record[Idx++];
+    unsigned NumLists = Record[Idx++];
+    unsigned NumComponents = Record[Idx++];
+    C = OMPMapClause::CreateEmpty(Context, NumVars, NumDeclarations, NumLists,
+                                  NumComponents);
     break;
+  }
   case OMPC_num_teams:
     C = new (Context) OMPNumTeamsClause();
     break;
@@ -2225,12 +2231,45 @@ void OMPClauseReader::VisitOMPMapClause(OMPMapClause *C) {
   C->setMapLoc(Reader->ReadSourceLocation(Record, Idx));
   C->setColonLoc(Reader->ReadSourceLocation(Record, Idx));
   auto NumVars = C->varlist_size();
+  auto UniqueDecls = C->getUniqueDeclarationsNum();
+  auto TotalLists = C->getTotalComponentListNum();
+  auto TotalComponents = C->getTotalComponentsNum();
+
   SmallVector<Expr *, 16> Vars;
   Vars.reserve(NumVars);
-  for (unsigned i = 0; i != NumVars; ++i) {
+  for (unsigned i = 0; i != NumVars; ++i)
     Vars.push_back(Reader->Reader.ReadSubExpr());
-  }
   C->setVarRefs(Vars);
+
+  SmallVector<ValueDecl *, 16> Decls;
+  Decls.reserve(UniqueDecls);
+  for (unsigned i = 0; i < UniqueDecls; ++i)
+    Decls.push_back(
+        Reader->Reader.ReadDeclAs<ValueDecl>(Reader->F, Record, Idx));
+  C->setUniqueDecls(Decls);
+
+  SmallVector<unsigned, 16> ListsPerDecl;
+  ListsPerDecl.reserve(UniqueDecls);
+  for (unsigned i = 0; i < UniqueDecls; ++i)
+    ListsPerDecl.push_back(Record[Idx++]);
+  C->setDeclNumLists(ListsPerDecl);
+
+  SmallVector<unsigned, 32> ListSizes;
+  ListSizes.reserve(TotalLists);
+  for (unsigned i = 0; i < TotalLists; ++i)
+    ListSizes.push_back(Record[Idx++]);
+  C->setComponentListSizes(ListSizes);
+
+  SmallVector<OMPClauseMappableExprCommon::MappableComponent, 32> Components;
+  Components.reserve(TotalComponents);
+  for (unsigned i = 0; i < TotalComponents; ++i) {
+    Expr *AssociatedExpr = Reader->Reader.ReadSubExpr();
+    ValueDecl *AssociatedDecl =
+        Reader->Reader.ReadDeclAs<ValueDecl>(Reader->F, Record, Idx);
+    Components.push_back(OMPClauseMappableExprCommon::MappableComponent(
+        AssociatedExpr, AssociatedDecl));
+  }
+  C->setComponents(Components, ListSizes);
 }
 
 void OMPClauseReader::VisitOMPNumTeamsClause(OMPNumTeamsClause *C) {