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140 lines
6.3 KiB
140 lines
6.3 KiB
; RUN: opt %s -sroa -instcombine -inline -instcombine -sroa -verify -S -o - | FileCheck %s
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;
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; This test checks that SROA pass processes debug info correctly if applied twice.
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; Specifically, after SROA works first time, instcombine converts dbg.declare
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; intrinsics into dbg.value. Inlining creates new opportunities for SROA,
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; so it is called again. This time it does not handle correctly previously
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; inserted dbg.value intrinsics: current SROA implementation while doing
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; "Migrate debug information from the old alloca to the new alloca(s)" handles
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; only dbg.declare intrinsic. In this case, original dbg.declare was lowered by
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; instcombine pass into dbg.value. When it comes into SROA second time, all dbg.value
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; intrinsics, inserted by instcombine pass before second SROA, just not updated
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; (though SROA was done). The fix is to not lower dbg.declare for structures.
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;
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; Hand-reduced from this example (-g -O -mllvm -disable-llvm-optzns -gno-column-info):
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;
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; struct S1 {
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; int p1;
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;
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; bool IsNull ( ) { return p1 == 0; }
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; };
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;
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; S1 foo ( void );
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;
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; int bar ( ) {
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; S1 result = foo();
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;
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; if (result.IsNull())
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; return 0;
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;
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; return result.p1 + 1;
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; }
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; CHECK: _Z3barv
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; CHECK: %[[RESULT:.*]] = call i32 @_Z3foov
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; CHECK: llvm.dbg.value(metadata i32 %[[RESULT]], metadata [[METADATA_IDX1:![0-9]+]]
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; CHECK: ret
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; CHECK: DICompileUnit
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; CHECK: [[METADATA_IDX1]] = !DILocalVariable(name: "result"
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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%struct.S1 = type { i32 }
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$_ZN2S16IsNullEv = comdat any
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define dso_local i32 @_Z3barv() !dbg !7 {
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entry:
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%retval = alloca i32, align 4
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%result = alloca %struct.S1, align 4
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%cleanup.dest.slot = alloca i32, align 4
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%0 = bitcast %struct.S1* %result to i8*, !dbg !21
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call void @llvm.lifetime.start.p0i8(i64 4, i8* %0) #5, !dbg !21
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call void @llvm.dbg.declare(metadata %struct.S1* %result, metadata !12, metadata !DIExpression()), !dbg !21
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%call = call i32 @_Z3foov(), !dbg !21
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%coerce.dive = getelementptr inbounds %struct.S1, %struct.S1* %result, i32 0, i32 0, !dbg !21
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store i32 %call, i32* %coerce.dive, align 4, !dbg !21
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%call1 = call zeroext i1 @_ZN2S16IsNullEv(%struct.S1* %result), !dbg !22
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br i1 %call1, label %if.then, label %if.end, !dbg !24
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if.then: ; preds = %entry
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store i32 0, i32* %retval, align 4, !dbg !25
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store i32 1, i32* %cleanup.dest.slot, align 4
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br label %cleanup, !dbg !25
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if.end: ; preds = %entry
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%p1 = getelementptr inbounds %struct.S1, %struct.S1* %result, i32 0, i32 0, !dbg !26
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%1 = load i32, i32* %p1, align 4, !dbg !26
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%add = add nsw i32 %1, 1, !dbg !26
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store i32 %add, i32* %retval, align 4, !dbg !26
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store i32 1, i32* %cleanup.dest.slot, align 4
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br label %cleanup, !dbg !26
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cleanup: ; preds = %if.end, %if.then
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%2 = bitcast %struct.S1* %result to i8*, !dbg !32
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call void @llvm.lifetime.end.p0i8(i64 4, i8* %2) #5, !dbg !32
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%3 = load i32, i32* %retval, align 4, !dbg !32
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ret i32 %3, !dbg !32
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}
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declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture)
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declare void @llvm.dbg.declare(metadata, metadata, metadata)
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declare dso_local i32 @_Z3foov()
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define linkonce_odr dso_local zeroext i1 @_ZN2S16IsNullEv(%struct.S1* %this) #4 comdat align 2 !dbg !33 {
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entry:
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%this.addr = alloca %struct.S1*, align 8
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store %struct.S1* %this, %struct.S1** %this.addr, align 8
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call void @llvm.dbg.declare(metadata %struct.S1** %this.addr, metadata !35, metadata !DIExpression()), !dbg !39
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%this1 = load %struct.S1*, %struct.S1** %this.addr, align 8
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%p1 = getelementptr inbounds %struct.S1, %struct.S1* %this1, i32 0, i32 0, !dbg !40
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%0 = load i32, i32* %p1, align 4, !dbg !40
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%cmp = icmp eq i32 %0, 0, !dbg !40
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ret i1 %cmp, !dbg !40
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}
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declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture)
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5}
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!llvm.ident = !{!6}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None)
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!1 = !DIFile(filename: "sroa-after-inlining.cpp", directory: "")
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!2 = !{}
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!3 = !{i32 2, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{i32 1, !"wchar_size", i32 4}
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!6 = !{!"clang"}
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!7 = distinct !DISubprogram(name: "bar", linkageName: "_Z3barv", scope: !1, file: !1, line: 9, type: !8, scopeLine: 9, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11)
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!8 = !DISubroutineType(types: !9)
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!9 = !{!10}
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!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!11 = !{!12}
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!12 = !DILocalVariable(name: "result", scope: !7, file: !1, line: 10, type: !13)
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!13 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "S1", file: !1, line: 1, size: 32, flags: DIFlagTypePassByValue, elements: !14, identifier: "_ZTS2S1")
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!14 = !{!15, !16}
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!15 = !DIDerivedType(tag: DW_TAG_member, name: "p1", scope: !13, file: !1, line: 2, baseType: !10, size: 32)
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!16 = !DISubprogram(name: "IsNull", linkageName: "_ZN2S16IsNullEv", scope: !13, file: !1, line: 4, type: !17, scopeLine: 4, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized)
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!17 = !DISubroutineType(types: !18)
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!18 = !{!19, !20}
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!19 = !DIBasicType(name: "bool", size: 8, encoding: DW_ATE_boolean)
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!20 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !13, size: 64, flags: DIFlagArtificial | DIFlagObjectPointer)
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!21 = !DILocation(line: 10, scope: !7)
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!22 = !DILocation(line: 12, scope: !23)
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!23 = distinct !DILexicalBlock(scope: !7, file: !1, line: 12)
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!24 = !DILocation(line: 12, scope: !7)
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!25 = !DILocation(line: 13, scope: !23)
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!26 = !DILocation(line: 15, scope: !7)
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!32 = !DILocation(line: 16, scope: !7)
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!33 = distinct !DISubprogram(name: "IsNull", linkageName: "_ZN2S16IsNullEv", scope: !13, file: !1, line: 4, type: !17, scopeLine: 4, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, declaration: !16, retainedNodes: !34)
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!34 = !{!35}
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!35 = !DILocalVariable(name: "this", arg: 1, scope: !33, type: !36, flags: DIFlagArtificial | DIFlagObjectPointer)
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!36 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !13, size: 64)
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!39 = !DILocation(line: 0, scope: !33)
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!40 = !DILocation(line: 4, scope: !33)
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