DebugInfo: Introduce new DIValue, DIETypeSignature to encode references to type units via their signatures

This simplifies type unit and type unit reference creation as well as
setting the stage for inter-type hashing across type unit boundaries.

llvm-svn: 197539

1 files changed, 5 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp
index 87a38912448..85a76287434 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp
@@ -322,6 +322,11 @@ void DwarfUnit::addDIEEntry(DIE *Die, dwarf::Attribute Attribute, DIE *Entry) {
   addDIEEntry(Die, Attribute, createDIEEntry(Entry));
 }
 
+void DwarfUnit::addDIETypeSignature(DIE *Die, const DwarfTypeUnit &Type) {
+  Die->addValue(dwarf::DW_AT_signature, dwarf::DW_FORM_ref_sig8,
+                new (DIEValueAllocator) DIETypeSignature(Type));
+}
+
 void DwarfUnit::addDIEEntry(DIE *Die, dwarf::Attribute Attribute,
                             DIEEntry *Entry) {
   const DIE *DieCU = Die->getUnitOrNull();