From 1905a18abcb46e6a57eeaa291cd81fc669cedfd0 Mon Sep 17 00:00:00 2001
From: Devang Patel <dpatel@apple.com>
Date: Thu, 16 Sep 2010 20:57:49 +0000
Subject: [PATCH] If FE forgot to provide a file name (usually it uses "stdin"
 as name in such situation) then make one up to ensure that debug info is not
 malformed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114119 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/AsmPrinter/DwarfDebug.cpp      |  4 +++
 test/DebugInfo/2010-09-16-EmptyFilename.ll | 31 ++++++++++++++++++++++
 2 files changed, 35 insertions(+)
 create mode 100644 test/DebugInfo/2010-09-16-EmptyFilename.ll

diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index c886a5ecc61..8e3c1f12ff1 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -1750,6 +1750,10 @@ unsigned DwarfDebug::GetOrCreateSourceID(StringRef DirName, StringRef FileName){
   unsigned DId;
   assert (DirName.empty() == false && "Invalid directory name!");
 
+  // If FE did not provide a file name, then assume stdin.
+  if (FileName.empty())
+    return GetOrCreateSourceID(DirName, "<stdin>");
+
   StringMap<unsigned>::iterator DI = DirectoryIdMap.find(DirName);
   if (DI != DirectoryIdMap.end()) {
     DId = DI->getValue();
diff --git a/test/DebugInfo/2010-09-16-EmptyFilename.ll b/test/DebugInfo/2010-09-16-EmptyFilename.ll
new file mode 100644
index 00000000000..66c1e88a15a
--- /dev/null
+++ b/test/DebugInfo/2010-09-16-EmptyFilename.ll
@@ -0,0 +1,31 @@
+; RUN: llc -O0 < %s - | FileCheck %s
+; Radar 8286101
+; CHECK: File size
+; CHECK-NEXT: stdin
+; CHECK-NEXT: Directory
+
+define i32 @foo() nounwind ssp {
+entry:
+  ret i32 42, !dbg !8
+}
+
+define i32 @bar() nounwind ssp {
+entry:
+  ret i32 21, !dbg !10
+}
+
+!llvm.dbg.sp = !{!0, !6}
+
+!0 = metadata !{i32 524334, i32 0, metadata !1, metadata !"foo", metadata !"foo", metadata !"foo", metadata !1, i32 53, metadata !3, i1 false, i1 true, i32 0, i32 0, null, i1 false, i1 false, i32 ()* @foo} ; [ DW_TAG_subprogram ]
+!1 = metadata !{i32 524329, metadata !"", metadata !"/private/tmp", metadata !2} ; [ DW_TAG_file_type ]
+!2 = metadata !{i32 524305, i32 0, i32 12, metadata !"bug.c", metadata !"/private/tmp", metadata !"clang version 2.9 (trunk 114084)", i1 true, i1 false, 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 !7, metadata !"bar", metadata !"bar", metadata !"bar", metadata !7, i32 4, metadata !3, i1 false, i1 true, i32 0, i32 0, null, i1 false, i1 false, i32 ()* @bar} ; [ DW_TAG_subprogram ]
+!7 = metadata !{i32 524329, metadata !"bug.c", metadata !"/private/tmp", metadata !2} ; [ DW_TAG_file_type ]
+!8 = metadata !{i32 53, i32 13, metadata !9, null}
+!9 = metadata !{i32 524299, metadata !0, i32 53, i32 11, metadata !1, i32 0} ; [ DW_TAG_lexical_block ]
+!10 = metadata !{i32 4, i32 13, metadata !11, null}
+!11 = metadata !{i32 524299, metadata !12, i32 4, i32 13, metadata !7, i32 2} ; [ DW_TAG_lexical_block ]
+!12 = metadata !{i32 524299, metadata !6, i32 4, i32 11, metadata !7, i32 1} ; [ DW_TAG_lexical_block ]
-- 
2.34.1