[ThinLTO] Import type as decl only when non-null Identifier
As per post-commit review for r289993 (D27775), we can only safely
import a type as a decl if it has an Identifier, as the Name alone
is not enough to be unique across modules.
llvm-svn: 290915
diff --git a/llvm/lib/Bitcode/Reader/MetadataLoader.cpp b/llvm/lib/Bitcode/Reader/MetadataLoader.cpp
index cd08268..5da421a 100644
--- a/llvm/lib/Bitcode/Reader/MetadataLoader.cpp
+++ b/llvm/lib/Bitcode/Reader/MetadataLoader.cpp
@@ -749,7 +749,7 @@
// handles the case where this is type ODRed with a definition needed
// by the importing module, in which case the existing definition is
// used.
- if (IsImporting && !ImportFullTypeDefinitions &&
+ if (IsImporting && !ImportFullTypeDefinitions && Identifier &&
(Tag == dwarf::DW_TAG_enumeration_type ||
Tag == dwarf::DW_TAG_class_type ||
Tag == dwarf::DW_TAG_structure_type ||