Avoid writing a VTABLE_USES record in PCH if there are no entries.
llvm-svn: 110122
diff --git a/clang/lib/Frontend/PCHReader.cpp b/clang/lib/Frontend/PCHReader.cpp
index d5cf75c..b415f8d 100644
--- a/clang/lib/Frontend/PCHReader.cpp
+++ b/clang/lib/Frontend/PCHReader.cpp
@@ -3133,13 +3133,15 @@
// If there were any VTable uses, deserialize the information and add it
// to Sema's vector and map of VTable uses.
- unsigned Idx = 0;
- for (unsigned I = 0, N = VTableUses[Idx++]; I != N; ++I) {
- CXXRecordDecl *Class = cast<CXXRecordDecl>(GetDecl(VTableUses[Idx++]));
- SourceLocation Loc = ReadSourceLocation(VTableUses, Idx);
- bool DefinitionRequired = VTableUses[Idx++];
- SemaObj->VTableUses.push_back(std::make_pair(Class, Loc));
- SemaObj->VTablesUsed[Class] = DefinitionRequired;
+ if (!VTableUses.empty()) {
+ unsigned Idx = 0;
+ for (unsigned I = 0, N = VTableUses[Idx++]; I != N; ++I) {
+ CXXRecordDecl *Class = cast<CXXRecordDecl>(GetDecl(VTableUses[Idx++]));
+ SourceLocation Loc = ReadSourceLocation(VTableUses, Idx);
+ bool DefinitionRequired = VTableUses[Idx++];
+ SemaObj->VTableUses.push_back(std::make_pair(Class, Loc));
+ SemaObj->VTablesUsed[Class] = DefinitionRequired;
+ }
}
// If there were any dynamic classes declarations, deserialize them