Fix PR12942: Allow two CUs to be generated from the same source file.

Thanks Eric for the review.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169142 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 74 insertions, 0 deletions

diff --git a/test/DebugInfo/two-cus-from-same-file.ll b/test/DebugInfo/two-cus-from-same-file.ll
new file mode 100644
index 0000000000..74817078e1
--- /dev/null
+++ b/test/DebugInfo/two-cus-from-same-file.ll
@@ -0,0 +1,74 @@
+; For http://llvm.org/bugs/show_bug.cgi?id=12942
+;   There are two CUs coming from /tmp/foo.c in this module. Make sure it doesn't
+;   blow llc up and produces something reasonable.
+;
+
+; RUN: llc %s -o %t -filetype=obj -O0
+; RUN: llvm-dwarfdump %t | FileCheck %s
+
+; ModuleID = 'test.bc'
+
+@str = private unnamed_addr constant [4 x i8] c"FOO\00"
+@str1 = private unnamed_addr constant [6 x i8] c"Main!\00"
+
+define void @foo() nounwind {
+entry:
+  %puts = tail call i32 @puts(i8* getelementptr inbounds ([4 x i8]* @str, i32 0, i32 0)), !dbg !23
+  ret void, !dbg !25
+}
+
+declare i32 @puts(i8* nocapture) nounwind
+
+define i32 @main(i32 %argc, i8** nocapture %argv) nounwind {
+entry:
+  tail call void @llvm.dbg.value(metadata !{i32 %argc}, i64 0, metadata !21), !dbg !26
+  tail call void @llvm.dbg.value(metadata !{i8** %argv}, i64 0, metadata !22), !dbg !27
+  %puts = tail call i32 @puts(i8* getelementptr inbounds ([6 x i8]* @str1, i32 0, i32 0)), !dbg !28
+  tail call void @foo() nounwind, !dbg !30
+  ret i32 0, !dbg !31
+}
+
+declare void @llvm.dbg.value(metadata, i64, metadata) nounwind readnone
+
+!llvm.dbg.cu = !{!0, !9}
+
+!0 = metadata !{i32 786449, i32 0, i32 12, metadata !"foo.c", metadata !"/tmp", metadata !"clang version 3.2 (trunk 156513)", i1 true, i1 true, metadata !"", i32 0, metadata !1, metadata !1, metadata !3, metadata !1} ; [ DW_TAG_compile_unit ]
+!1 = metadata !{metadata !2}
+!2 = metadata !{i32 0}
+!3 = metadata !{metadata !4}
+!4 = metadata !{metadata !5}
+!5 = metadata !{i32 786478, i32 0, metadata !6, metadata !"foo", metadata !"foo", metadata !"", metadata !6, i32 5, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, void ()* @foo, null, null, metadata !1, i32 5} ; [ DW_TAG_subprogram ]
+!6 = metadata !{i32 786473, metadata !"foo.c", metadata !"/tmp", null} ; [ DW_TAG_file_type ]
+!7 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, i32 0} ; [ DW_TAG_subroutine_type ]
+!8 = metadata !{null}
+!9 = metadata !{i32 786449, i32 0, i32 12, metadata !"foo.c", metadata !"/tmp", metadata !"clang version 3.2 (trunk 156513)", i1 true, i1 true, metadata !"", i32 0, metadata !1, metadata !1, metadata !10, metadata !1} ; [ DW_TAG_compile_unit ]
+!10 = metadata !{metadata !11}
+!11 = metadata !{metadata !12}
+!12 = metadata !{i32 786478, i32 0, metadata !6, metadata !"main", metadata !"main", metadata !"", metadata !6, i32 11, metadata !13, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, i32 (i32, i8**)* @main, null, null, metadata !19, i32 11} ; [ DW_TAG_subprogram ]
+!13 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !14, i32 0, i32 0} ; [ DW_TAG_subroutine_type ]
+!14 = metadata !{metadata !15, metadata !15, metadata !16}
+!15 = metadata !{i32 786468, null, metadata !"int", null, i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
+!16 = metadata !{i32 786447, null, metadata !"", null, i32 0, i64 32, i64 32, i64 0, i32 0, metadata !17} ; [ DW_TAG_pointer_type ]
+!17 = metadata !{i32 786447, null, metadata !"", null, i32 0, i64 32, i64 32, i64 0, i32 0, metadata !18} ; [ DW_TAG_pointer_type ]
+!18 = metadata !{i32 786468, null, metadata !"char", null, i32 0, i64 8, i64 8, i64 0, i32 0, i32 6} ; [ DW_TAG_base_type ]
+!19 = metadata !{metadata !20}
+!20 = metadata !{metadata !21, metadata !22}
+!21 = metadata !{i32 786689, metadata !12, metadata !"argc", metadata !6, i32 16777227, metadata !15, i32 0, i32 0} ; [ DW_TAG_arg_variable ]
+!22 = metadata !{i32 786689, metadata !12, metadata !"argv", metadata !6, i32 33554443, metadata !16, i32 0, i32 0} ; [ DW_TAG_arg_variable ]
+!23 = metadata !{i32 6, i32 3, metadata !24, null}
+!24 = metadata !{i32 786443, metadata !5, i32 5, i32 16, metadata !6, i32 0} ; [ DW_TAG_lexical_block ]
+!25 = metadata !{i32 7, i32 1, metadata !24, null}
+!26 = metadata !{i32 11, i32 14, metadata !12, null}
+!27 = metadata !{i32 11, i32 26, metadata !12, null}
+!28 = metadata !{i32 12, i32 3, metadata !29, null}
+!29 = metadata !{i32 786443, metadata !12, i32 11, i32 34, metadata !6, i32 0} ; [ DW_TAG_lexical_block ]
+!30 = metadata !{i32 13, i32 3, metadata !29, null}
+!31 = metadata !{i32 14, i32 3, metadata !29, null}
+
+; Expect two different compile units to be emitted with the same filename
+; attribute
+; CHECK: {{Compile Unit.*next CU at}}
+; CHECK: {{DW_AT_name.*foo\.c}}
+; CHECK: {{Compile Unit.*next CU at}}
+; CHECK: {{DW_AT_name.*foo\.c}}
+