Add more comments to what's going on here.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171780 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp b/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
index 60d7cd3..372f98d 100644
--- a/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
@@ -126,7 +126,9 @@
/// addString - Add a string attribute data and value. We always emit a
/// reference to the string pool instead of immediate strings so that DIEs have
-/// more predictable sizes.
+/// more predictable sizes. In the case of split dwarf we emit an index
+/// into another table which gets us the static offset into the string
+/// table.
void CompileUnit::addString(DIE *Die, unsigned Attribute, StringRef String) {
if (!DD->useSplitDwarf()) {
MCSymbol *Symb = DU->getStringPoolEntry(String);