| ; RUN: opt %s -passes='cgscc(function(sroa,instcombine),inline),function(instcombine,sroa),verify' -S -o - | FileCheck %s |
| ; |
| ; This test checks that SROA pass processes debug info correctly if applied twice. |
| ; Specifically, after SROA works first time, instcombine converts dbg.declare |
| ; intrinsics into dbg.value. Inlining creates new opportunities for SROA, |
| ; so it is called again. This time it does not handle correctly previously |
| ; inserted dbg.value intrinsics: current SROA implementation while doing |
| ; "Migrate debug information from the old alloca to the new alloca(s)" handles |
| ; only dbg.declare intrinsic. In this case, original dbg.declare was lowered by |
| ; instcombine pass into dbg.value. When it comes into SROA second time, all dbg.value |
| ; intrinsics, inserted by instcombine pass before second SROA, just not updated |
| ; (though SROA was done). The fix is to not lower dbg.declare for structures. |
| |
| ; |
| ; Hand-reduced from this example (-g -O -mllvm -disable-llvm-optzns -gno-column-info): |
| ; |
| ; struct S1 { |
| ; int p1; |
| ; |
| ; bool IsNull ( ) { return p1 == 0; } |
| ; }; |
| ; |
| ; S1 foo ( void ); |
| ; |
| ; int bar ( ) { |
| ; S1 result = foo(); |
| ; |
| ; if (result.IsNull()) |
| ; return 0; |
| ; |
| ; return result.p1 + 1; |
| ; } |
| |
| ; CHECK: _Z3barv |
| ; CHECK: %[[RESULT:.*]] = call i32 @_Z3foov |
| ; CHECK: llvm.dbg.value(metadata i32 %[[RESULT]], metadata [[METADATA_IDX1:![0-9]+]] |
| ; CHECK: ret |
| ; CHECK: DICompileUnit |
| ; CHECK: [[METADATA_IDX1]] = !DILocalVariable(name: "result" |
| |
| target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| %struct.S1 = type { i32 } |
| |
| $_ZN2S16IsNullEv = comdat any |
| |
| define dso_local i32 @_Z3barv() !dbg !7 { |
| entry: |
| %retval = alloca i32, align 4 |
| %result = alloca %struct.S1, align 4 |
| %cleanup.dest.slot = alloca i32, align 4 |
| call void @llvm.lifetime.start.p0(i64 4, ptr %result) #5, !dbg !21 |
| call void @llvm.dbg.declare(metadata ptr %result, metadata !12, metadata !DIExpression()), !dbg !21 |
| %call = call i32 @_Z3foov(), !dbg !21 |
| store i32 %call, ptr %result, align 4, !dbg !21 |
| %call1 = call zeroext i1 @_ZN2S16IsNullEv(ptr %result), !dbg !22 |
| br i1 %call1, label %if.then, label %if.end, !dbg !24 |
| |
| if.then: ; preds = %entry |
| store i32 0, ptr %retval, align 4, !dbg !25 |
| store i32 1, ptr %cleanup.dest.slot, align 4 |
| br label %cleanup, !dbg !25 |
| |
| if.end: ; preds = %entry |
| %0 = load i32, ptr %result, align 4, !dbg !26 |
| %add = add nsw i32 %0, 1, !dbg !26 |
| store i32 %add, ptr %retval, align 4, !dbg !26 |
| store i32 1, ptr %cleanup.dest.slot, align 4 |
| br label %cleanup, !dbg !26 |
| |
| cleanup: ; preds = %if.end, %if.then |
| call void @llvm.lifetime.end.p0(i64 4, ptr %result) #5, !dbg !32 |
| %1 = load i32, ptr %retval, align 4, !dbg !32 |
| ret i32 %1, !dbg !32 |
| } |
| |
| declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) |
| |
| declare void @llvm.dbg.declare(metadata, metadata, metadata) |
| |
| declare dso_local i32 @_Z3foov() |
| |
| define linkonce_odr dso_local zeroext i1 @_ZN2S16IsNullEv(ptr %this) #4 comdat align 2 !dbg !33 { |
| entry: |
| %this.addr = alloca ptr, align 8 |
| store ptr %this, ptr %this.addr, align 8 |
| call void @llvm.dbg.declare(metadata ptr %this.addr, metadata !35, metadata !DIExpression()), !dbg !39 |
| %this1 = load ptr, ptr %this.addr, align 8 |
| %0 = load i32, ptr %this1, align 4, !dbg !40 |
| %cmp = icmp eq i32 %0, 0, !dbg !40 |
| ret i1 %cmp, !dbg !40 |
| } |
| |
| declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!3, !4, !5} |
| !llvm.ident = !{!6} |
| |
| !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None) |
| !1 = !DIFile(filename: "sroa-after-inlining.cpp", directory: "") |
| !2 = !{} |
| !3 = !{i32 2, !"Dwarf Version", i32 4} |
| !4 = !{i32 2, !"Debug Info Version", i32 3} |
| !5 = !{i32 1, !"wchar_size", i32 4} |
| !6 = !{!"clang"} |
| !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) |
| !8 = !DISubroutineType(types: !9) |
| !9 = !{!10} |
| !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) |
| !11 = !{!12} |
| !12 = !DILocalVariable(name: "result", scope: !7, file: !1, line: 10, type: !13) |
| !13 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "S1", file: !1, line: 1, size: 32, flags: DIFlagTypePassByValue, elements: !14, identifier: "_ZTS2S1") |
| !14 = !{!15, !16} |
| !15 = !DIDerivedType(tag: DW_TAG_member, name: "p1", scope: !13, file: !1, line: 2, baseType: !10, size: 32) |
| !16 = !DISubprogram(name: "IsNull", linkageName: "_ZN2S16IsNullEv", scope: !13, file: !1, line: 4, type: !17, scopeLine: 4, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized) |
| !17 = !DISubroutineType(types: !18) |
| !18 = !{!19, !20} |
| !19 = !DIBasicType(name: "bool", size: 8, encoding: DW_ATE_boolean) |
| !20 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !13, size: 64, flags: DIFlagArtificial | DIFlagObjectPointer) |
| !21 = !DILocation(line: 10, scope: !7) |
| !22 = !DILocation(line: 12, scope: !23) |
| !23 = distinct !DILexicalBlock(scope: !7, file: !1, line: 12) |
| !24 = !DILocation(line: 12, scope: !7) |
| !25 = !DILocation(line: 13, scope: !23) |
| !26 = !DILocation(line: 15, scope: !7) |
| !32 = !DILocation(line: 16, scope: !7) |
| !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) |
| !34 = !{!35} |
| !35 = !DILocalVariable(name: "this", arg: 1, scope: !33, type: !36, flags: DIFlagArtificial | DIFlagObjectPointer) |
| !36 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !13, size: 64) |
| !39 = !DILocation(line: 0, scope: !33) |
| !40 = !DILocation(line: 4, scope: !33) |