Debug Info: Support DW_TAG_imported_declaration

This provides basic functionality for imported declarations. For
subprograms and types some amount of lazy construction is supported (so
the definition of a function can proceed the using declaration), but it
still doesn't handle declared-but-not-defined functions (since we don't
generally emit function declarations).

Variable support is really rudimentary at the moment - simply looking up
the existing definition with no support for out of order (declaration,
imported_module, then definition).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181392 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 3 insertions, 1 deletions

diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 4b2e86a..d8de3ca 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -807,8 +807,10 @@ void DwarfDebug::constructImportedEntityDIE(CompileUnit *TheCU,
     EntityDie = TheCU->getOrCreateNameSpace(DINameSpace(Entity));
   else if (Entity.isSubprogram())
     EntityDie = TheCU->getOrCreateSubprogramDIE(DISubprogram(Entity));
+  else if (Entity.isType())
+    EntityDie = TheCU->getOrCreateTypeDIE(DIType(Entity));
   else
-    return;
+    EntityDie = TheCU->getDIE(Entity);
   unsigned FileID = getOrCreateSourceID(Module.getContext().getFilename(),
                                         Module.getContext().getDirectory(),
                                         TheCU->getUniqueID());