1 ; RUN: opt < %s -gvn -S | FileCheck %s
3 ; Produced at -O2 from:
16 source_filename = "test/DebugInfo/Generic/gvn.ll"
17 target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
18 target triple = "arm64-apple-ios"
20 @a = common global i32 0, align 4, !dbg !0
21 @b = common global i32 0, align 4, !dbg !6
23 ; Function Attrs: nounwind
24 define void @f3() #0 !dbg !12 {
26 ; Verify that the call still has a debug location after GVN.
27 ; CHECK: %call = tail call i32 @f2(i32 1) #{{[0-9]}}, !dbg
28 %call = tail call i32 @f2(i32 1) #0, !dbg !15
29 store i32 %call, i32* @a, align 4, !dbg !15, !tbaa !24
30 tail call void @llvm.dbg.value(metadata i32* @a, metadata !22, metadata !28) #0, !dbg !29
31 %0 = load i32, i32* @b, align 4, !dbg !29, !tbaa !24
32 %tobool.i = icmp eq i32 %0, 0, !dbg !29
33 br i1 %tobool.i, label %if.end.i, label %land.lhs.true.i.thread, !dbg !30
35 land.lhs.true.i.thread: ; preds = %entry
36 store i32 1, i32* @a, align 4, !dbg !32, !tbaa !24
37 br label %if.then.3.i, !dbg !33
39 ; This instruction has no debug location -- in this
40 ; particular case it was removed by a bug in SimplifyCFG.
41 if.end.i: ; preds = %entry
42 %.pr = load i32, i32* @a, align 4
43 ; GVN is supposed to replace the load of %.pr with a direct reference to %call.
44 ; CHECK: %tobool2.i = icmp eq i32 %call, 0, !dbg
45 %tobool2.i = icmp eq i32 %.pr, 0, !dbg !34
46 br i1 %tobool2.i, label %f1.exit, label %if.then.3.i, !dbg !34
48 if.then.3.i: ; preds = %if.end.i, %land.lhs.true.i.thread
49 %call.i = tail call i32 bitcast (i32 (...)* @f4 to i32 ()*)() #0, !dbg !35
50 br label %f1.exit, !dbg !35
52 f1.exit: ; preds = %if.then.3.i, %if.end.i
60 ; Function Attrs: nounwind readnone
61 declare void @llvm.dbg.value(metadata, metadata, metadata) #1
63 attributes #0 = { nounwind }
64 attributes #1 = { nounwind readnone }
67 !llvm.module.flags = !{!9, !10}
70 !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
71 !1 = !DIGlobalVariable(name: "a", scope: !2, file: !3, line: 1, type: !8, isLocal: false, isDefinition: true)
72 !2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 3.8.0 (trunk 245562) (llvm/trunk 245569)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5)
73 !3 = !DIFile(filename: "test.c", directory: "/")
76 !6 = !DIGlobalVariableExpression(var: !7, expr: !DIExpression())
77 !7 = !DIGlobalVariable(name: "b", scope: !2, file: !3, line: 1, type: !8, isLocal: false, isDefinition: true)
78 !8 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
79 !9 = !{i32 2, !"Dwarf Version", i32 2}
80 !10 = !{i32 2, !"Debug Info Version", i32 3}
81 !11 = !{!"clang version 3.8.0 (trunk 245562) (llvm/trunk 245569)"}
82 !12 = distinct !DISubprogram(name: "f3", scope: !3, file: !3, line: 9, type: !13, isLocal: false, isDefinition: true, scopeLine: 9, flags: DIFlagPrototyped, isOptimized: true, unit: !2, retainedNodes: !4)
83 !13 = !DISubroutineType(types: !14)
85 !15 = !DILocation(line: 5, scope: !16, inlinedAt: !23)
86 !16 = distinct !DILexicalBlock(scope: !17, file: !3, line: 5)
87 !17 = distinct !DISubprogram(name: "f1", scope: !3, file: !3, line: 2, type: !18, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: true, unit: !2, retainedNodes: !21)
88 !18 = !DISubroutineType(types: !19)
90 !20 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !8, size: 64, align: 64)
92 !22 = !DILocalVariable(name: "p1", arg: 1, scope: !17, file: !3, line: 2, type: !20)
93 !23 = distinct !DILocation(line: 11, scope: !12)
94 !24 = !{!25, !25, i64 0}
95 !25 = !{!"int", !26, i64 0}
96 !26 = !{!"omnipotent char", !27, i64 0}
97 !27 = !{!"Simple C/C++ TBAA"}
99 !29 = !DILocation(line: 2, scope: !17, inlinedAt: !23)
100 !30 = !DILocation(line: 3, scope: !31, inlinedAt: !23)
101 !31 = distinct !DILexicalBlock(scope: !17, file: !3, line: 3)
102 !32 = !DILocation(line: 3, scope: !17, inlinedAt: !23)
103 !33 = !DILocation(line: 4, scope: !31, inlinedAt: !23)
104 !34 = !DILocation(line: 5, scope: !17, inlinedAt: !23)
105 !35 = !DILocation(line: 6, scope: !16, inlinedAt: !23)
106 !36 = !DILocation(line: 12, scope: !12)