Don't import __va_list_tag or __builtin_va_list when merging
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@96299 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/ASTMerge.cpp b/lib/Frontend/ASTMerge.cpp
index 821863e..3f74e42 100644
--- a/lib/Frontend/ASTMerge.cpp
+++ b/lib/Frontend/ASTMerge.cpp
@@ -52,6 +52,12 @@
for (DeclContext::decl_iterator D = TU->decls_begin(),
DEnd = TU->decls_end();
D != DEnd; ++D) {
+ // Don't re-import __va_list_tag, __builtin_va_list.
+ if (NamedDecl *ND = dyn_cast<NamedDecl>(*D))
+ if (IdentifierInfo *II = ND->getIdentifier())
+ if (II->isStr("__va_list_tag") || II->isStr("__builtin_va_list"))
+ continue;
+
Importer.Import(*D);
}