1 ; RUN: opt -passes=instcombine -S %s -o - | FileCheck %s
2 ; RUN: opt -passes=instcombine -S %s -o - --try-experimental-debuginfo-iterators | FileCheck %s
4 ; In this example, the cast from ptr to ptr becomes trivially dead. We should
5 ; salvage its debug info.
8 ; void use_as_void(ptr);
14 ; ModuleID = '<stdin>'
15 source_filename = "t.c"
16 target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
17 target triple = "x86_64-pc-windows-msvc19.11.25508"
19 ; Function Attrs: nounwind uwtable
20 define void @f(ptr %p) !dbg !11 {
22 call void @llvm.dbg.value(metadata ptr %p, metadata !16, metadata !DIExpression()), !dbg !18
23 call void @llvm.dbg.value(metadata ptr %p, metadata !17, metadata !DIExpression()), !dbg !20
24 call void @use_as_void(ptr %p), !dbg !22
28 ; CHECK-LABEL: define void @f(ptr %p)
29 ; CHECK: #dbg_value(ptr %p, ![[P_VAR:[0-9]+]], !DIExpression(),
31 ; CHECK: #dbg_value(ptr %p, ![[Q_VAR:[0-9]+]], !DIExpression(),
35 ; CHECK: ![[P_VAR]] = !DILocalVariable(name: "p", {{.*}})
36 ; CHECK: ![[Q_VAR]] = !DILocalVariable(name: "q", {{.*}})
38 declare void @use_as_void(ptr)
40 declare void @llvm.dbg.value(metadata, metadata, metadata)
43 !llvm.module.flags = !{!6, !7, !8, !9}
46 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 6.0.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3)
47 !1 = !DIFile(filename: "t.c", directory: "C:\5Csrc\5Cllvm-project\5Cbuild", checksumkind: CSK_MD5, checksum: "56c40617ada23a8cccbd9a16bcec57af")
50 !4 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !5, size: 64)
51 !5 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
52 !6 = !{i32 2, !"CodeView", i32 1}
53 !7 = !{i32 2, !"Debug Info Version", i32 3}
54 !8 = !{i32 1, !"wchar_size", i32 2}
55 !9 = !{i32 7, !"PIC Level", i32 2}
56 !10 = !{!"clang version 6.0.0 "}
57 !11 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 2, type: !12, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !15)
58 !12 = !DISubroutineType(types: !13)
60 !14 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
62 !16 = !DILocalVariable(name: "p", arg: 1, scope: !11, file: !1, line: 2, type: !14)
63 !17 = !DILocalVariable(name: "q", scope: !11, file: !1, line: 3, type: !4)
64 !18 = !DILocation(line: 2, column: 14, scope: !11)
65 !19 = !DILocation(line: 3, column: 12, scope: !11)
66 !20 = !DILocation(line: 3, column: 8, scope: !11)
67 !21 = !DILocation(line: 4, column: 15, scope: !11)
68 !22 = !DILocation(line: 4, column: 3, scope: !11)
69 !23 = !DILocation(line: 5, column: 1, scope: !11)