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.

llvm-svn: 114119

2 files changed, 35 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index c886a5ecc61..8e3c1f12ff1 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/llvm/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/llvm/test/DebugInfo/2010-09-16-EmptyFilename.ll b/llvm/test/DebugInfo/2010-09-16-EmptyFilename.ll
new file mode 100644
index 00000000000..66c1e88a15a
--- /dev/null
+++ b/llvm/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 ]