From c09ddc1c792b35a20b2aeaa708fd00a76638805c Mon Sep 17 00:00:00 2001
From: Devang Patel <dpatel@apple.com>
Date: Tue, 1 Dec 2009 18:13:48 +0000
Subject: [PATCH] Clear function specific containers while processing end of a
 function, even if DW_TAG_subprogram for current function is not found.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90247 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/AsmPrinter/DwarfDebug.cpp  | 16 +++++++---------
 test/DebugInfo/2009-12-01-CurrentFn.ll | 17 +++++++++++++++++
 2 files changed, 24 insertions(+), 9 deletions(-)
 create mode 100644 test/DebugInfo/2009-12-01-CurrentFn.ll

diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index c2e1e0503a8..30264c751bb 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -2092,17 +2092,15 @@ void DwarfDebug::endFunction(MachineFunction *MF) {
                                                MMI->getFrameMoves()));
 
   // Clear debug info
-  if (CurrentFnDbgScope) {
-    CurrentFnDbgScope = NULL;
-    DbgScopeMap.clear();
-    DbgScopeBeginMap.clear();
-    DbgScopeEndMap.clear();
-    ConcreteScopes.clear();
-    AbstractScopesList.clear();
-  }
+  CurrentFnDbgScope = NULL;
+  DbgScopeMap.clear();
+  DbgScopeBeginMap.clear();
+  DbgScopeEndMap.clear();
+  ConcreteScopes.clear();
+  AbstractScopesList.clear();
 
   Lines.clear();
-
+  
   if (TimePassesIsEnabled)
     DebugTimer->stopTimer();
 }
diff --git a/test/DebugInfo/2009-12-01-CurrentFn.ll b/test/DebugInfo/2009-12-01-CurrentFn.ll
new file mode 100644
index 00000000000..d33a8f476e7
--- /dev/null
+++ b/test/DebugInfo/2009-12-01-CurrentFn.ll
@@ -0,0 +1,17 @@
+; RUN: llc < %s | grep "func_end1:" | count 1
+
+declare void @foo()
+
+define void @bar(i32 %i) nounwind ssp {
+entry:
+  tail call void @foo() nounwind, !dbg !0
+  ret void, !dbg !0
+}
+
+!0 = metadata !{i32 9, i32 0, metadata !1, null}
+!1 = metadata !{i32 458798, i32 0, metadata !2, metadata !"baz", metadata !"baz", metadata !"baz", metadata !2, i32 8, metadata !3, i1 true, i1 true}; [DW_TAG_subprogram ]
+!2 = metadata !{i32 458769, i32 0, i32 1, metadata !"2007-12-VarArrayDebug.c", metadata !"/Volumes/Data/ddunbar/llvm/test/FrontendC", metadata !"4.2.1 (Based on Apple Inc. build 5653) (LLVM build)", i1 true, i1 true, metadata !"", i32 0}; [DW_TAG_compile_unit ]
+!3 = metadata !{i32 458773, metadata !2, metadata !"", metadata !2, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !4, i32 0}; [DW_TAG_subroutine_type ]
+!4 = metadata !{null, metadata !5}
+!5 = metadata !{i32 458788, metadata !2, metadata !"int", metadata !2, i32 0, i64 32, i64 32, i64 0, i32 0, i32 5}; [DW_TAG_base_type ]
+