From 722f2290b800ea96670e923ee9a4aa3b9efa35e8 Mon Sep 17 00:00:00 2001
From: Devang Patel <dpatel@apple.com>
Date: Tue, 30 Mar 2010 22:09:52 +0000
Subject: [PATCH] Ignore invalid metadata.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99938 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/AsmPrinter/DwarfDebug.cpp            |  2 ++
 test/DebugInfo/2010-03-30-InvalidDbgInfoCrash.ll | 30 ++++++++++++++++++++++++
 2 files changed, 32 insertions(+)
 create mode 100644 test/DebugInfo/2010-03-30-InvalidDbgInfoCrash.ll

diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index d3d5b2992d2..00a98fba0b4 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -2163,6 +2163,7 @@ bool DwarfDebug::extractScopeInformation() {
       if (DL.isUnknown()) continue;
       DILocation DLT = MF->getDILocation(DL);
       DIScope DLTScope = DLT.getScope();
+      if (!DLTScope.getNode()) continue;
       // There is no need to create another DIE for compile unit. For all
       // other scopes, create one DbgScope now. This will be translated
       // into a scope DIE at the end.
@@ -2184,6 +2185,7 @@ bool DwarfDebug::extractScopeInformation() {
       if (DL.isUnknown())  continue;
       DILocation DLT = MF->getDILocation(DL);
       DIScope DLTScope = DLT.getScope();
+      if (!DLTScope.getNode()) continue;
       // There is no need to create another DIE for compile unit. For all
       // other scopes, create one DbgScope now. This will be translated
       // into a scope DIE at the end.
diff --git a/test/DebugInfo/2010-03-30-InvalidDbgInfoCrash.ll b/test/DebugInfo/2010-03-30-InvalidDbgInfoCrash.ll
new file mode 100644
index 00000000000..9bb35fab4fe
--- /dev/null
+++ b/test/DebugInfo/2010-03-30-InvalidDbgInfoCrash.ll
@@ -0,0 +1,30 @@
+; RUN: llc < %s -o /dev/null
+
+define void @baz(i32 %i) nounwind ssp {
+entry:
+  call void @llvm.dbg.declare(metadata !0, metadata !1), !dbg !0
+  ret void, !dbg !0
+}
+
+declare void @llvm.dbg.declare(metadata, metadata) nounwind readnone
+
+!0 = metadata !{{ [0 x i8] }** undef}
+!1 = metadata !{i32 524544, metadata !2, metadata !"x", metadata !4, i32 11, metadata !9} ; [ DW_TAG_auto_variable ]
+!2 = metadata !{i32 524299, metadata !3, i32 8, i32 0} ; [ DW_TAG_lexical_block ]
+!3 = metadata !{i32 524334, i32 0, metadata !4, metadata !"baz", metadata !"baz", metadata !"baz", metadata !4, i32 8, metadata !6, i1 true, i1 true, i32 0, i32 0, null, i1 false} ; [ DW_TAG_subprogram ]
+!4 = metadata !{i32 524329, metadata !"2007-12-VarArrayDebug.c", metadata !"/Users/sabre/llvm/test/FrontendC/", metadata !5} ; [ DW_TAG_file_type ]
+!5 = metadata !{i32 524305, i32 0, i32 1, metadata !"2007-12-VarArrayDebug.c", metadata !"/Users/sabre/llvm/test/FrontendC/", metadata !"4.2.1 (Based on Apple Inc. build 5658) (LLVM build)", i1 true, i1 false, metadata !"", i32 0} ; [ DW_TAG_compile_unit ]
+!6 = metadata !{i32 524309, metadata !4, metadata !"", metadata !4, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !7, i32 0, null} ; [ DW_TAG_subroutine_type ]
+!7 = metadata !{null, metadata !8}
+!8 = metadata !{i32 524324, metadata !4, metadata !"int", metadata !4, i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
+!9 = metadata !{i32 524303, metadata !4, metadata !"", metadata !4, i32 0, i64 64, i64 64, i64 0, i32 0, metadata !10} ; [ DW_TAG_pointer_type ]
+!10 = metadata !{i32 524307, metadata !3, metadata !"", metadata !4, i32 11, i64 8, i64 8, i64 0, i32 0, null, metadata !11, i32 0, null} ; [ DW_TAG_structure_type ]
+!11 = metadata !{metadata !12}
+!12 = metadata !{i32 524301, metadata !10, metadata !"b", metadata !4, i32 11, i64 8, i64 8, i64 0, i32 0, metadata !13} ; [ DW_TAG_member ]
+!13 = metadata !{i32 524310, metadata !3, metadata !"A", metadata !4, i32 11, i64 0, i64 0, i64 0, i32 0, metadata !14} ; [ DW_TAG_typedef ]
+!14 = metadata !{i32 524289, metadata !4, metadata !"", metadata !4, i32 0, i64 8, i64 8, i64 0, i32 0, metadata !15, metadata !16, i32 0, null} ; [ DW_TAG_array_type ]
+!15 = metadata !{i32 524324, metadata !4, metadata !"char", metadata !4, i32 0, i64 8, i64 8, i64 0, i32 0, i32 6} ; [ DW_TAG_base_type ]
+!16 = metadata !{metadata !17}
+!17 = metadata !{i32 524321, i64 0, i64 0}        ; [ DW_TAG_subrange_type ]
+!18 = metadata !{metadata !"llvm.mdnode.fwdref.19"}
+!19 = metadata !{metadata !"llvm.mdnode.fwdref.23"}
-- 
2.11.0