Debug Info: use DW_FORM_ref_addr instead of DW_FORM_ref4 if the referenced DIE
belongs to a different compile unit.
DW_FORM_ref_addr should be used for cross compile-unit reference.
When compiling a large application, we got a dwarfdump verification error where
abstract_origin points to nowhere.
This error can't be reproduced on any testing case in MultiSource.
We may have other cases where we use DW_FORM_ref4 unconditionally.
rdar://problem/13370501
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176882 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/AsmPrinter/DwarfCompileUnit.h b/lib/CodeGen/AsmPrinter/DwarfCompileUnit.h
index 77bf6a9..2b180c6 100644
--- a/lib/CodeGen/AsmPrinter/DwarfCompileUnit.h
+++ b/lib/CodeGen/AsmPrinter/DwarfCompileUnit.h
@@ -87,6 +87,9 @@
/// corresponds to the MDNode mapped with the subprogram DIE.
DenseMap<DIE *, const MDNode *> ContainingTypeMap;
+ /// Offset of the CUDie from beginning of debug info section.
+ unsigned DebugInfoOffset;
+
/// getLowerBoundDefault - Return the default lower bound for an array. If the
/// DWARF version doesn't handle the language, return -1.
int64_t getDefaultLowerBound() const;
@@ -103,6 +106,7 @@
unsigned getUniqueID() const { return UniqueID; }
unsigned getLanguage() const { return Language; }
DIE* getCUDie() const { return CUDie.get(); }
+ unsigned getDebugInfoOffset() const { return DebugInfoOffset; }
const StringMap<DIE*> &getGlobalNames() const { return GlobalNames; }
const StringMap<DIE*> &getGlobalTypes() const { return GlobalTypes; }
@@ -120,6 +124,7 @@
return AccelTypes;
}
+ void setDebugInfoOffset(unsigned DbgInfoOff) { DebugInfoOffset = DbgInfoOff; }
/// hasContent - Return true if this compile unit has something to write out.
///
bool hasContent() const { return !CUDie->getChildren().empty(); }