xref: /llvm-project/llvm/test/DebugInfo/Generic/assignment-tracking/instcombine/remove-redundant-dbg.ll (revision 094572701dce4aaf36f4521d6cf750420d39f206) 
1; RUN: opt -passes=sroa -S %s -o - \
2; RUN: | FileCheck %s --implicit-check-not="call void @llvm.dbg"
3; RUN: opt --try-experimental-debuginfo-iterators -passes=sroa -S %s -o - \
4; RUN: | FileCheck %s --implicit-check-not="call void @llvm.dbg"
5
6;; Check that sroa removes redundant debug intrinsics after it makes a
7;; change. This has a significant positive impact on peak memory and compiler
8;; run time.
9
10; CHECK: #dbg_assign(i32 1
11
12define dso_local void @_Z3funv() local_unnamed_addr !dbg !7 {
13entry:
14  %sroa-remove-me = alloca i32
15  call void @llvm.dbg.assign(metadata i32 undef, metadata !11, metadata !DIExpression(), metadata !13, metadata ptr undef, metadata !DIExpression()), !dbg !14
16  call void @_Z3extv(), !dbg !15
17  call void @llvm.dbg.assign(metadata i32 0, metadata !11, metadata !DIExpression(), metadata !13, metadata ptr undef, metadata !DIExpression()), !dbg !14
18  call void @llvm.dbg.assign(metadata i32 1, metadata !11, metadata !DIExpression(), metadata !13, metadata ptr undef, metadata !DIExpression()), !dbg !14
19  ret void, !dbg !16
20}
21
22declare !dbg !17 dso_local void @_Z3extv() local_unnamed_addr
23declare void @llvm.dbg.assign(metadata, metadata, metadata, metadata, metadata, metadata)
24
25!llvm.dbg.cu = !{!0}
26!llvm.module.flags = !{!2, !3, !4, !5, !1000}
27!llvm.ident = !{!6}
28
29!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)
30!1 = !DIFile(filename: "test.cpp", directory: "/")
31!2 = !{i32 7, !"Dwarf Version", i32 5}
32!3 = !{i32 2, !"Debug Info Version", i32 3}
33!4 = !{i32 1, !"wchar_size", i32 4}
34!5 = !{i32 7, !"uwtable", i32 1}
35!6 = !{!"clang version 14.0.0)"}
36!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)
37!8 = !DISubroutineType(types: !9)
38!9 = !{null}
39!10 = !{!11}
40!11 = !DILocalVariable(name: "a", scope: !7, file: !1, line: 2, type: !12)
41!12 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
42!13 = distinct !DIAssignID()
43!14 = !DILocation(line: 0, scope: !7)
44!15 = !DILocation(line: 2, column: 25, scope: !7)
45!16 = !DILocation(line: 2, column: 32, scope: !7)
46!17 = !DISubprogram(name: "ext", linkageName: "_Z3extv", scope: !1, file: !1, line: 1, type: !8, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !18)
47!18 = !{}
48!1000 = !{i32 7, !"debug-info-assignment-tracking", i1 true}
49