From 7a328270be871f640d94fcebfd48dee02950fb8c Mon Sep 17 00:00:00 2001
From: Devang Patel <dpatel@apple.com>
Date: Mon, 15 Aug 2011 21:43:21 +0000
Subject: [PATCH] There is no need to maintain a set to keep track of variables
 that use location expressions. In such cases, AT_location attribute's value
 will be a label.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137659 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/AsmPrinter/DwarfDebug.cpp | 6 ++----
 lib/CodeGen/AsmPrinter/DwarfDebug.h   | 4 ----
 2 files changed, 2 insertions(+), 8 deletions(-)

diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 0fa820dee21..07268abf05d 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -412,7 +412,6 @@ DIE *DwarfDebug::constructVariableDIE(DbgVariable *DV, LexicalScope *Scope) {
                          dwarf::DW_FORM_data4,
                          Asm->GetTempSymbol("debug_loc", Offset));
     DV->setDIE(VariableDie);
-    UseDotDebugLocEntry.insert(VariableDie);
     return VariableDie;
   }
 
@@ -1676,10 +1675,9 @@ void DwarfDebug::emitDIE(DIE *Die) {
       break;
     }
     case dwarf::DW_AT_location: {
-      if (UseDotDebugLocEntry.count(Die) != 0) {
-        DIELabel *L = cast<DIELabel>(Values[i]);
+      if (DIELabel *L = dyn_cast<DIELabel>(Values[i]))
         Asm->EmitLabelDifference(L->getValue(), DwarfDebugLocSectionSym, 4);
-      } else
+      else
         Values[i]->EmitValue(Asm, Form);
       break;
     }
diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.h b/lib/CodeGen/AsmPrinter/DwarfDebug.h
index 7f26850dedf..2a3b03ebe46 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.h
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.h
@@ -234,10 +234,6 @@ class DwarfDebug {
   /// DotDebugLocEntries - Collection of DotDebugLocEntry.
   SmallVector<DotDebugLocEntry, 4> DotDebugLocEntries;
 
-  /// UseDotDebugLocEntry - DW_AT_location attributes for the DIEs in this set
-  /// idetifies corresponding .debug_loc entry offset.
-  SmallPtrSet<const DIE *, 4> UseDotDebugLocEntry;
-
   /// InliendSubprogramDIEs - Collection of subprgram DIEs that are marked
   /// (at the end of the module) as DW_AT_inline.
   SmallPtrSet<DIE *, 4> InlinedSubprogramDIEs;