From 18efced1a29f7a022c42ff2e2a4e10c1dc46bdbb Mon Sep 17 00:00:00 2001
From: Devang Patel <dpatel@apple.com>
Date: Mon, 19 Jul 2010 17:53:55 +0000
Subject: [PATCH] Fix PR 7662. Do not try to insert local variable info to a
 DIE used for function declaration.

llvm-svn: 108731
---
 llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp |  1 +
 llvm/test/DebugInfo/2010-07-19-Crash.ll    | 24 ++++++++++++++++++++++
 2 files changed, 25 insertions(+)
 create mode 100644 llvm/test/DebugInfo/2010-07-19-Crash.ll

diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 65c1d190216f..d891ce8a475a 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -2032,6 +2032,7 @@ void DwarfDebug::endModule() {
       if (!SP.Verify()) continue;
 
       // Collect info for variables that were optimized out.
+      if (!SP.isDefinition()) continue;
       StringRef FName = SP.getLinkageName();
       if (FName.empty())
         FName = SP.getName();
diff --git a/llvm/test/DebugInfo/2010-07-19-Crash.ll b/llvm/test/DebugInfo/2010-07-19-Crash.ll
new file mode 100644
index 000000000000..87a4a8955a3e
--- /dev/null
+++ b/llvm/test/DebugInfo/2010-07-19-Crash.ll
@@ -0,0 +1,24 @@
+; RUN: llc -o /dev/null < %s
+; PR7662
+; Do not add variables to !11 because it is a declaration entry.
+
+define i32 @bar() nounwind readnone ssp {
+entry:
+  ret i32 42, !dbg !9
+}
+
+!llvm.dbg.sp = !{!0, !6, !11}
+!llvm.dbg.lv.foo = !{!7}
+
+!0 = metadata !{i32 524334, i32 0, metadata !1, metadata !"bar", metadata !"bar", metadata !"bar", metadata !1, i32 3, metadata !3, i1 false, i1 true, i32 0, i32 0, null, i1 false, i1 true, i32 ()* @bar} ; [ DW_TAG_subprogram ]
+!1 = metadata !{i32 524329, metadata !"one.c", metadata !"/private/tmp", metadata !2} ; [ DW_TAG_file_type ]
+!2 = metadata !{i32 524305, i32 0, i32 12, metadata !"one.c", metadata !".", metadata !"clang 2.8", i1 true, i1 true, metadata !"", i32 0} ; [ DW_TAG_compile_unit ]
+!3 = metadata !{i32 524309, metadata !1, metadata !"", metadata !1, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !4, i32 0, null} ; [ DW_TAG_subroutine_type ]
+!4 = metadata !{metadata !5}
+!5 = metadata !{i32 524324, metadata !1, metadata !"int", metadata !1, i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
+!6 = metadata !{i32 524334, i32 0, metadata !1, metadata !"foo", metadata !"foo", metadata !"foo", metadata !1, i32 7, metadata !3, i1 true, i1 true, i32 0, i32 0, null, i1 false, i1 true, null} ; [ DW_TAG_subprogram ]
+!11 = metadata !{i32 524334, i32 0, metadata !1, metadata !"foo", metadata !"foo", metadata !"foo", metadata !1, i32 7, metadata !3, i1 true, i1 false, i32 0, i32 0, null, i1 false, i1 true, null} ; [ DW_TAG_subprogram ]
+!7 = metadata !{i32 524544, metadata !8, metadata !"one", metadata !1, i32 8, metadata !5} ; [ DW_TAG_auto_variable ]
+!8 = metadata !{i32 524299, metadata !6, i32 7, i32 18} ; [ DW_TAG_lexical_block ]
+!9 = metadata !{i32 4, i32 3, metadata !10, null}
+!10 = metadata !{i32 524299, metadata !0, i32 3, i32 11} ; [ DW_TAG_lexical_block ]