[llvm] r336837 - [DebugInfo] Fix getPreviousSibling after r336823

[Fangrui Song via llvm-commits]

Author: maskray
Date: Wed Jul 11 12:09:37 2018
New Revision: 336837

URL: http://llvm.org/viewvc/llvm-project?rev=336837&view=rev
Log:
[DebugInfo] Fix getPreviousSibling after r336823

Modified:
    llvm/trunk/lib/DebugInfo/DWARF/DWARFUnit.cpp

Modified: llvm/trunk/lib/DebugInfo/DWARF/DWARFUnit.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/DebugInfo/DWARF/DWARFUnit.cpp?rev=336837&r1=336836&r2=336837&view=diff
==============================================================================
--- llvm/trunk/lib/DebugInfo/DWARF/DWARFUnit.cpp (original)
+++ llvm/trunk/lib/DebugInfo/DWARF/DWARFUnit.cpp Wed Jul 11 12:09:37 2018
@@ -593,7 +593,8 @@ DWARFDie DWARFUnit::getPreviousSibling(c
     return DWARFDie();
 
   // Find the previous DIE whose depth is the same as the Die's depth.
-  for (size_t I = getDIEIndex(Die) - 1; I >= 0; --I) {
+  for (size_t I = getDIEIndex(Die); I > 0;) {
+    --I;
     if (DieArray[I].getDepth() == Depth - 1)
       return DWARFDie();
     if (DieArray[I].getDepth() == Depth)