1; RUN: opt -passes=instcombine -S %s -o -  \
2; RUN: | FileCheck %s --implicit-check-not="call void @llvm.dbg"
3; RUN: opt --try-experimental-debuginfo-iterators -passes=instcombine -S %s -o -  \
4; RUN: | FileCheck %s --implicit-check-not="call void @llvm.dbg"
5
6;; Based on the test remove-redundant-dbg.ll.
7;;
8;; Check that instcombine does not remove redundant debug intrinsics when
9;; assignment tracking is turned off. This test is here to check the existing
10;; behaviour is maintained. If it is discovered that it is profitable to remove
11;; these intrinsics in instcombine then it's okay to remove this test.
12
13; CHECK: #dbg_value(i32 undef
14; CHECK: #dbg_value(i32 0
15; CHECK: #dbg_value(i32 1
16
17define dso_local void @_Z3funv() local_unnamed_addr !dbg !7 {
18entry:
19  call void @llvm.dbg.value(metadata i32 undef, metadata !11, metadata !DIExpression()), !dbg !14
20  call void @_Z3extv(), !dbg !15
21  call void @llvm.dbg.value(metadata i32 0, metadata !11, metadata !DIExpression()), !dbg !14
22  call void @llvm.dbg.value(metadata i32 1, metadata !11, metadata !DIExpression()), !dbg !14
23  ret void, !dbg !16
24}
25
26declare !dbg !17 dso_local void @_Z3extv() local_unnamed_addr
27declare void @llvm.dbg.value(metadata, metadata, metadata)
28
29!llvm.dbg.cu = !{!0}
30!llvm.module.flags = !{!2, !3, !4, !5}
31!llvm.ident = !{!6}
32
33!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 14.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, splitDebugInlining: false, nameTableKind: None)
34!1 = !DIFile(filename: "test.cpp", directory: "/")
35!2 = !{i32 7, !"Dwarf Version", i32 5}
36!3 = !{i32 2, !"Debug Info Version", i32 3}
37!4 = !{i32 1, !"wchar_size", i32 4}
38!5 = !{i32 7, !"uwtable", i32 1}
39!6 = !{!"clang version 14.0.0)"}
40!7 = distinct !DISubprogram(name: "fun", linkageName: "_Z3funv", scope: !1, file: !1, line: 2, type: !8, scopeLine: 2, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !10)
41!8 = !DISubroutineType(types: !9)
42!9 = !{null}
43!10 = !{!11}
44!11 = !DILocalVariable(name: "a", scope: !7, file: !1, line: 2, type: !12)
45!12 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
46!13 = distinct !DIAssignID()
47!14 = !DILocation(line: 0, scope: !7)
48!15 = !DILocation(line: 2, column: 25, scope: !7)
49!16 = !DILocation(line: 2, column: 32, scope: !7)
50!17 = !DISubprogram(name: "ext", linkageName: "_Z3extv", scope: !1, file: !1, line: 1, type: !8, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !18)
51!18 = !{}
52