Add comment.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102129 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.h b/lib/CodeGen/AsmPrinter/DwarfDebug.h
index b3f9745808175554c5df74c9eda95c7bc46d3f3f..16d413705353ae5457f4922032a1040fdba28fb3 100644 (file)
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.h
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.h
@@ -197,6 +197,11 @@ class DwarfDebug {
   DenseMap<const MachineInstr *, MCSymbol *> LabelsAfterInsn;
 
   SmallVector<const MCSymbol *, 8> DebugRangeSymbols;
+
+  /// weakDebugRangeSymbols - In cases where function bodies is not emitted
+  /// into .text section, use function begin marker as anchor for debug range
+  /// offsets. This map keeps track of such symbols and corresponding
+  /// function begin marker symbols.
   DenseMap<const MCSymbol *, const MCSymbol *> WeakDebugRangeSymbols;
 
   /// Previous instruction's location information. This is used to determine