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.cpp b/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
index 01f15e5..1c743c2 100644
--- a/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
@@ -35,7 +35,7 @@
CompileUnit::CompileUnit(unsigned UID, unsigned L, DIE *D, AsmPrinter *A,
DwarfDebug *DW, DwarfUnits *DWU)
: UniqueID(UID), Language(L), CUDie(D), Asm(A), DD(DW), DU(DWU),
- IndexTyDie(0) {
+ IndexTyDie(0), DebugInfoOffset(0) {
DIEIntegerOne = new (DIEValueAllocator) DIEInteger(1);
}