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llvm-mirror/test/DebugInfo/Generic/tu-composite.ll
Shiva Chen a2029fa58e [DebugInfo] Add DILabel metadata and intrinsic llvm.dbg.label. 
In order to set breakpoints on labels and list source code around
labels, we need collect debug information for labels, i.e., label
name, the function label belong, line number in the file, and the
address label located. In order to keep these information in LLVM
IR and to allow backend to generate debug information correctly.
We create a new kind of metadata for labels, DILabel. The format
of DILabel is

!DILabel(scope: !1, name: "foo", file: !2, line: 3)

We hope to keep debug information as much as possible even the
code is optimized. So, we create a new kind of intrinsic for label
metadata to avoid the metadata is eliminated with basic block.
The intrinsic will keep existing if we keep it from optimized out.
The format of the intrinsic is

llvm.dbg.label(metadata !1)

It has only one argument, that is the DILabel metadata. The
intrinsic will follow the label immediately. Backend could get the
label metadata through the intrinsic's parameter.

We also create DIBuilder API for labels to be used by Frontend.
Frontend could use createLabel() to allocate DILabel objects, and use
insertLabel() to insert llvm.dbg.label intrinsic in LLVM IR.

Differential Revision: https://reviews.llvm.org/D45024

Patch by Hsiangkai Wang.

llvm-svn: 331841
2018-05-09 02:40:45 +00:00

184 lines
9.8 KiB
LLVM
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; REQUIRES: object-emission
; RUN: %llc_dwarf -filetype=obj -O0 < %s > %t
; RUN: llvm-dwarfdump -v -debug-info %t | FileCheck %s
; CHECK: [[TYPE:.*]]: DW_TAG_structure_type
; Make sure we correctly handle containing type of a struct being a type identifier.
; CHECK-NEXT: DW_AT_containing_type [DW_FORM_ref4] (cu + {{.*}} => {[[TYPE]]})
; CHECK-NEXT: DW_AT_name [DW_FORM_strp] {{.*}}= "C")
; Make sure we correctly handle context of a subprogram being a type identifier.
; CHECK: [[SP:.*]]: DW_TAG_subprogram
; CHECK: DW_AT_name [DW_FORM_strp] {{.*}}= "foo")
; Make sure we correctly handle containing type of a subprogram being a type identifier.
; CHECK: DW_AT_containing_type [DW_FORM_ref4] (cu + {{.*}} => {[[TYPE]]})
; CHECK: DW_TAG_formal_parameter
; CHECK: NULL
; CHECK: NULL
; CHECK: [[TYPE2:.*]]: DW_TAG_structure_type
; CHECK: DW_AT_name [DW_FORM_strp] {{.*}}= "bar")
; CHECK: DW_TAG_structure_type
; CHECK: DW_AT_name [DW_FORM_strp] {{.*}}= "D")
; CHECK: DW_TAG_member
; CHECK: DW_AT_name [DW_FORM_strp] {{.*}}= "a")
; Make sure we correctly handle context of a struct being a type identifier.
; CHECK: DW_TAG_structure_type
; CHECK-NEXT: DW_AT_name [DW_FORM_strp] {{.*}}= "Nested")
; CHECK: DW_TAG_structure_type
; CHECK-NEXT: DW_AT_name [DW_FORM_strp] {{.*}}= "Nested2")
; CHECK-NEXT: DW_AT_declaration [DW_FORM_flag] (0x01)
; CHECK: DW_TAG_structure_type
; CHECK-NEXT: DW_AT_name [DW_FORM_strp] {{.*}}= "virt<bar>")
; Make sure we correctly handle type of a template_type being a type identifier.
; CHECK: DW_TAG_template_type_parameter
; CHECK-NEXT: DW_AT_type [DW_FORM_ref4] (cu + {{.*}} => {[[TYPE2]]}
; CHECK-NEXT: DW_AT_name [DW_FORM_strp] {{.*}}= "T")
; Make sure we correctly handle derived-from of a typedef being a type identifier.
; CHECK: DW_TAG_typedef
; CHECK-NEXT: DW_AT_type [DW_FORM_ref4] (cu + {{.*}} => {[[TYPE2]]}
; CHECK: DW_AT_name [DW_FORM_strp] {{.*}}= "baz2")
; Make sure we correctly handle derived-from of a pointer type being a type identifier.
; CHECK: DW_TAG_pointer_type
; CHECK: DW_AT_type [DW_FORM_ref4] (cu + {{.*}} => {[[TYPE]]}
; CHECK: DW_TAG_typedef
; CHECK-NEXT: DW_AT_type [DW_FORM_ref4] (cu + {{.*}} => {[[TYPE2]]}
; CHECK: DW_AT_name [DW_FORM_strp] {{.*}}= "baz")
; Make sure we correctly handle derived-from of an array type being a type identifier.
; CHECK: DW_TAG_array_type
; CHECK-NEXT: DW_AT_type [DW_FORM_ref4] (cu + {{.*}} => {[[TYPE2]]}
; IR generated from clang -g with the following source:
; struct C {
; virtual void foo();
; };
; void C::foo() {
; }
;
; struct bar { };
; typedef bar baz;
; struct D {
; typedef bar baz2;
; static int a;
; struct Nested { };
; struct Nested2 { };
; template <typename T>
; struct virt {
; T* values;
; };
; };
; void test() {
; baz B;
; bar A[3];
; D::baz2 B2;
; D::Nested e;
; D::Nested2 *p;
; D::virt<bar> t;
; }
%struct.C = type { i32 (...)** }
%struct.bar = type { i8 }
%"struct.D::Nested" = type { i8 }
%"struct.D::Nested2" = type { i8 }
%"struct.D::virt" = type { %struct.bar* }
@_ZTV1C = unnamed_addr constant [3 x i8*] [i8* null, i8* bitcast ({ i8*, i8* }* @_ZTI1C to i8*), i8* bitcast (void (%struct.C*)* @_ZN1C3fooEv to i8*)]
@_ZTVN10__cxxabiv117__class_type_infoE = external global i8*
@_ZTS1C = constant [3 x i8] c"1C\00"
@_ZTI1C = unnamed_addr constant { i8*, i8* } { i8* bitcast (i8** getelementptr inbounds (i8*, i8** @_ZTVN10__cxxabiv117__class_type_infoE, i64 2) to i8*), i8* getelementptr inbounds ([3 x i8], [3 x i8]* @_ZTS1C, i32 0, i32 0) }
; Function Attrs: nounwind ssp uwtable
define void @_ZN1C3fooEv(%struct.C* %this) unnamed_addr #0 align 2 !dbg !31 {
entry:
%this.addr = alloca %struct.C*, align 8
store %struct.C* %this, %struct.C** %this.addr, align 8
call void @llvm.dbg.declare(metadata %struct.C** %this.addr, metadata !36, metadata !DIExpression()), !dbg !38
%this1 = load %struct.C*, %struct.C** %this.addr
ret void, !dbg !39
}
; Function Attrs: nounwind readnone
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
; Function Attrs: nounwind ssp uwtable
define void @_Z4testv() #0 !dbg !32 {
entry:
%B = alloca %struct.bar, align 1
%A = alloca [3 x %struct.bar], align 1
%B2 = alloca %struct.bar, align 1
%e = alloca %"struct.D::Nested", align 1
%p = alloca %"struct.D::Nested2"*, align 8
%t = alloca %"struct.D::virt", align 8
call void @llvm.dbg.declare(metadata %struct.bar* %B, metadata !40, metadata !DIExpression()), !dbg !42
call void @llvm.dbg.declare(metadata [3 x %struct.bar]* %A, metadata !43, metadata !DIExpression()), !dbg !47
call void @llvm.dbg.declare(metadata %struct.bar* %B2, metadata !48, metadata !DIExpression()), !dbg !50
call void @llvm.dbg.declare(metadata %"struct.D::Nested"* %e, metadata !51, metadata !DIExpression()), !dbg !52
call void @llvm.dbg.declare(metadata %"struct.D::Nested2"** %p, metadata !53, metadata !DIExpression()), !dbg !55
call void @llvm.dbg.declare(metadata %"struct.D::virt"* %t, metadata !56, metadata !DIExpression()), !dbg !57
ret void, !dbg !58
}
attributes #0 = { nounwind ssp uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { nounwind readnone }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!35, !59}
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.4", isOptimized: false, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !3, globals: !2, imports: !2)
!1 = !DIFile(filename: "tmp.cpp", directory: ".")
!2 = !{}
!3 = !{!4, !18, !19, !22, !23, !24}
!4 = !DICompositeType(tag: DW_TAG_structure_type, name: "C", line: 1, file: !1, elements: !5, vtableHolder: !4, identifier: "_ZTS1C")
!5 = !{!6, !13}
!6 = !DIDerivedType(tag: DW_TAG_member, name: "_vptr$C", flags: DIFlagArtificial, file: !1, scope: !7, baseType: !8)
!7 = !DIFile(filename: "tmp.cpp", directory: ".")
!8 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, baseType: !9)
!9 = !DIDerivedType(tag: DW_TAG_pointer_type, name: "__vtbl_ptr_type", size: 64, baseType: !10)
!10 = !DISubroutineType(types: !11)
!11 = !{!12}
!12 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!13 = !DISubprogram(name: "foo", linkageName: "_ZN1C3fooEv", line: 2, isLocal: false, isDefinition: false, virtuality: DW_VIRTUALITY_virtual, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 2, file: !1, scope: !4, type: !14, containingType: !4)
!14 = !DISubroutineType(types: !15)
!15 = !{null, !16}
!16 = !DIDerivedType(tag: DW_TAG_pointer_type, flags: DIFlagArtificial | DIFlagObjectPointer, baseType: !4)
!18 = !DICompositeType(tag: DW_TAG_structure_type, name: "bar", line: 7, size: 8, align: 8, file: !1, elements: !2, identifier: "_ZTS3bar")
!19 = !DICompositeType(tag: DW_TAG_structure_type, name: "D", line: 9, size: 8, align: 8, file: !1, elements: !20, identifier: "_ZTS1D")
!20 = !{!21}
!21 = !DIDerivedType(tag: DW_TAG_member, name: "a", line: 11, flags: DIFlagStaticMember, file: !1, scope: !19, baseType: !12)
!22 = !DICompositeType(tag: DW_TAG_structure_type, name: "Nested", line: 12, size: 8, align: 8, file: !1, scope: !19, elements: !2, identifier: "_ZTSN1D6NestedE")
!23 = !DICompositeType(tag: DW_TAG_structure_type, name: "Nested2", line: 13, flags: DIFlagFwdDecl, file: !1, scope: !19, identifier: "_ZTSN1D7Nested2E")
!24 = !DICompositeType(tag: DW_TAG_structure_type, name: "virt<bar>", line: 15, file: !1, scope: !19, elements: !25, templateParams: !28, identifier: "_ZTSN1D4virtI3barEE")
!25 = !{!26}
!26 = !DIDerivedType(tag: DW_TAG_member, name: "values", line: 16, size: 64, align: 64, file: !1, scope: !24, baseType: !27)
!27 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !18)
!28 = !{!29}
!29 = !DITemplateTypeParameter(name: "T", type: !18)
!31 = distinct !DISubprogram(name: "foo", linkageName: "_ZN1C3fooEv", line: 4, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 4, file: !1, scope: null, type: !14, declaration: !13, retainedNodes: !2)
!32 = distinct !DISubprogram(name: "test", linkageName: "_Z4testv", line: 20, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 20, file: !1, scope: !7, type: !33, retainedNodes: !2)
!33 = !DISubroutineType(types: !34)
!34 = !{null}
!35 = !{i32 2, !"Dwarf Version", i32 2}
!36 = !DILocalVariable(name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !31, type: !37)
!37 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !4)
!38 = !DILocation(line: 0, scope: !31)
!39 = !DILocation(line: 5, scope: !31)
!40 = !DILocalVariable(name: "B", line: 21, scope: !32, file: !7, type: !41)
!41 = !DIDerivedType(tag: DW_TAG_typedef, name: "baz", line: 8, file: !1, baseType: !18)
!42 = !DILocation(line: 21, scope: !32)
!43 = !DILocalVariable(name: "A", line: 22, scope: !32, file: !7, type: !44)
!44 = !DICompositeType(tag: DW_TAG_array_type, size: 24, align: 8, baseType: !18, elements: !45)
!45 = !{!46}
!46 = !DISubrange(count: 3)
!47 = !DILocation(line: 22, scope: !32)
!48 = !DILocalVariable(name: "B2", line: 23, scope: !32, file: !7, type: !49)
!49 = !DIDerivedType(tag: DW_TAG_typedef, name: "baz2", line: 10, file: !1, scope: !19, baseType: !18)
!50 = !DILocation(line: 23, scope: !32)
!51 = !DILocalVariable(name: "e", line: 24, scope: !32, file: !7, type: !22)
!52 = !DILocation(line: 24, scope: !32)
!53 = !DILocalVariable(name: "p", line: 25, scope: !32, file: !7, type: !54)
!54 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !23)
!55 = !DILocation(line: 25, scope: !32)
!56 = !DILocalVariable(name: "t", line: 26, scope: !32, file: !7, type: !24)
!57 = !DILocation(line: 26, scope: !32)
!58 = !DILocation(line: 27, scope: !32)
!59 = !{i32 1, !"Debug Info Version", i32 3}
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