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1; RUN: opt < %s -passes=gvn -S | FileCheck %s2;3; Produced at -O2 from:4; int a, b;5; void f1(int *p1) {6; if (b)7; a = 1;8; if (a && *p1)9; f4();10; }11; int f2(int);12; void f3(void) {13; a = f2(1);14; f1(&a);15; }16source_filename = "test/DebugInfo/Generic/gvn.ll"17target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"18target triple = "arm64-apple-ios"19 20@a = common global i32 0, align 4, !dbg !021@b = common global i32 0, align 4, !dbg !622 23; Function Attrs: nounwind24define void @f3() #0 !dbg !12 {25entry:26 ; Verify that the call still has a debug location after GVN.27 ; CHECK: %call = tail call i32 @f2(i32 1) #{{[0-9]}}, !dbg28 %call = tail call i32 @f2(i32 1) #0, !dbg !1529 store i32 %call, ptr @a, align 4, !dbg !15, !tbaa !2430 tail call void @llvm.dbg.value(metadata ptr @a, metadata !22, metadata !28) #0, !dbg !2931 %0 = load i32, ptr @b, align 4, !dbg !29, !tbaa !2432 %tobool.i = icmp eq i32 %0, 0, !dbg !2933 br i1 %tobool.i, label %if.end.i, label %land.lhs.true.i.thread, !dbg !3034 35land.lhs.true.i.thread: ; preds = %entry36 store i32 1, ptr @a, align 4, !dbg !32, !tbaa !2437 br label %if.then.3.i, !dbg !3338 39 ; This instruction has no debug location -- in this40 ; particular case it was removed by a bug in SimplifyCFG.41if.end.i: ; preds = %entry42 %.pr = load i32, ptr @a, align 443 ; GVN is supposed to replace the load of %.pr with a direct reference to %call.44 ; CHECK: %tobool2.i = icmp eq i32 %call, 0, !dbg45 %tobool2.i = icmp eq i32 %.pr, 0, !dbg !3446 br i1 %tobool2.i, label %f1.exit, label %if.then.3.i, !dbg !3447 48if.then.3.i: ; preds = %if.end.i, %land.lhs.true.i.thread49 %call.i = tail call i32 @f4() #0, !dbg !3550 br label %f1.exit, !dbg !3551 52f1.exit: ; preds = %if.then.3.i, %if.end.i53 ret void, !dbg !3654}55 56declare i32 @f2(i32)57 58declare i32 @f4(...)59 60; Function Attrs: nounwind readnone61declare void @llvm.dbg.value(metadata, metadata, metadata) #162 63attributes #0 = { nounwind }64attributes #1 = { nounwind readnone }65 66!llvm.dbg.cu = !{!2}67!llvm.module.flags = !{!9, !10}68!llvm.ident = !{!11}69 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: "/")74!4 = !{}75!5 = !{!0, !6}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)84!14 = !{null}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)89!19 = !{null, !20}90!20 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !8, size: 64, align: 64)91!21 = !{!22}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"}98!28 = !DIExpression()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)107 108