1;RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu | FileCheck %s
2;
3; LexicalScope objects were not cleared when a nodebug function is handled in
4; LiveDebugValues. This may lead to an assertion in the constructor for LexicalScope,
5; triggered by LiveDebugValues when another (debug) function is handled later.
6;
7; This minimal example does not leave much to check for, so we just make sure we get
8; reasonable output, preserving function labels and a DBG_VALUE comment.
9;
10; CHECK-LABEL: foo:
11; CHECK-NEXT:  Lfunc_begin0:
12; CHECK:       Lfunc_end0:
13; CHECK-LABEL: bar:
14; CHECK-NEXT:  Lfunc_begin1:
15; CHECK:       #DEBUG_VALUE: foo:x <-
16; CHECK:       Lfunc_end1:
17
18define i32 @foo() {
19entry:
20  ret i32 0
21}
22
23define i32 @bar(i32 %x) !dbg !50 {
24entry:
25  tail call void @llvm.dbg.value(metadata i32 %x, i64 0, metadata !41, metadata !43), !dbg !52
26  %tobool.i = icmp eq i32 %x, 0
27  br i1 %tobool.i, label %foo.exit, label %if.then.i
28
29if.then.i:
30  br label %foo.exit
31
32foo.exit:
33  %x.addr.0.i = phi i32 [ 1, %if.then.i ], [ 0, %entry ]
34  ret i32 %x.addr.0.i
35}
36
37declare void @llvm.dbg.value(metadata, i64, metadata, metadata)
38
39!llvm.dbg.cu = !{!0, !3}
40!llvm.ident = !{!5, !5}
41!llvm.module.flags = !{!6, !7}
42
43!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
44!1 = !DIFile(filename: "foo.cpp", directory: "c:\temp")
45!2 = !{}
46!3 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !4, producer: "", isOptimized: true, runtimeVersion: 0, emissionKind: NoDebug, enums: !2)
47!4 = !DIFile(filename: "bar.cpp", directory: "c:\temp")
48!5 = !{!"clang version 4.0.0"}
49!6 = !{i32 2, !"Dwarf Version", i32 4}
50!7 = !{i32 2, !"Debug Info Version", i32 3}
51!36 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 1, type: !37, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !40)
52!37 = !DISubroutineType(types: !38)
53!38 = !{!39, !39}
54!39 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
55!40 = !{!41}
56!41 = !DILocalVariable(name: "x", arg: 1, scope: !36, file: !1, line: 1, type: !39)
57!43 = !DIExpression()
58!50 = distinct !DISubprogram(name: "bar", scope: !4, file: !4, line: 3, type: !51, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: true, unit: !3, retainedNodes: !2)
59!51 = !DISubroutineType(types: !2)
60!52 = !DILocation(line: 1, scope: !36, inlinedAt: !53)
61!53 = distinct !DILocation(line: 5, scope: !50)
62