DWARF: Avoid cross-CU references under Fission
Turns out that the Fission/Split DWARF package format (DWP) is currently
insufficient to handle cross-CU (ref_addr) references. So for now,
duplicate any debug info needed in these situations:
* inlined_subroutine's abstract_origin
* inlined variable's abstract_origin
* types
Keep the ref_addr behavior in general, including in the split DWARF
inline debug info that can be emitted into the object files for online
symbolication.
Keep a flag to use the old (ref_addr) behavior for testing ways of
addressing this limitation in the DWP tool (& for those not using DWP
packaging).
llvm-svn: 302858
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.h b/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.h
index 8fc8417..7acad2c 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.h
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.h
@@ -65,7 +65,7 @@
//===----------------------------------------------------------------------===//
/// This dwarf writer support class manages information associated with a
/// source file.
- class DwarfUnit : public DIEUnit {
+class DwarfUnit : public DIEUnit {
protected:
/// MDNode for the compile unit.
const DICompileUnit *CUNode;
@@ -103,6 +103,9 @@
bool applySubprogramDefinitionAttributes(const DISubprogram *SP, DIE &SPDie);
+ bool shareAcrossDWOCUs() const;
+ bool isShareableAcrossCUs(const DINode *D) const;
+
public:
// Accessors.
AsmPrinter* getAsmPrinter() const { return Asm; }