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llvm-mirror/test/DebugInfo/X86/decl-derived-member.ll
Peter Collingbourne a9fbb2813b DebugInfo: New metadata representation for global variables. 
This patch reverses the edge from DIGlobalVariable to GlobalVariable.
This will allow us to more easily preserve debug info metadata when
manipulating global variables.

Fixes PR30362. A program for upgrading test cases is attached to that
bug.

Differential Revision: http://reviews.llvm.org/D20147

llvm-svn: 281284
2016-09-13 01:12:59 +00:00

151 lines
8.5 KiB
LLVM
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; REQUIRES: object-emission
; RUN: llc -mtriple x86_64-pc-linux -O0 -filetype=obj %s -o %t
; RUN: llvm-dwarfdump %t | FileCheck %s
; Testcase from:
; struct base {
; virtual ~base();
; };
; typedef base base_type;
; struct foo {
; base_type b;
; };
; foo f;
; Where member b should be seen as a field at an offset and not a bitfield.
; CHECK: DW_TAG_member
; CHECK: DW_AT_name{{.*}}"b"
; CHECK-NOT: DW_AT_bit_offset
%struct.foo = type { %struct.base }
%struct.base = type { i32 (...)** }
$_ZN3fooC2Ev = comdat any
$_ZN3fooD2Ev = comdat any
$_ZN4baseC2Ev = comdat any
@f = global %struct.foo zeroinitializer, align 8, !dbg !29
@__dso_handle = external global i8
@_ZTV4base = external unnamed_addr constant [4 x i8*]
@llvm.global_ctors = appending global [1 x { i32, void ()*, i8* }] [{ i32, void ()*, i8* } { i32 65535, void ()* @_GLOBAL__sub_I_decl_derived_member.cpp, i8* null }]
define internal void @__cxx_global_var_init() section ".text.startup" !dbg !10 {
entry:
call void @_ZN3fooC2Ev(%struct.foo* @f) #2, !dbg !33
%0 = call i32 @__cxa_atexit(void (i8*)* bitcast (void (%struct.foo*)* @_ZN3fooD2Ev to void (i8*)*), i8* bitcast (%struct.foo* @f to i8*), i8* @__dso_handle) #2, !dbg !33
ret void, !dbg !33
}
; Function Attrs: inlinehint nounwind uwtable
define linkonce_odr void @_ZN3fooC2Ev(%struct.foo* %this) unnamed_addr #0 comdat align 2 !dbg !14 {
entry:
%this.addr = alloca %struct.foo*, align 8
store %struct.foo* %this, %struct.foo** %this.addr, align 8
call void @llvm.dbg.declare(metadata %struct.foo** %this.addr, metadata !34, metadata !36), !dbg !37
%this1 = load %struct.foo*, %struct.foo** %this.addr
%b = getelementptr inbounds %struct.foo, %struct.foo* %this1, i32 0, i32 0, !dbg !38
call void @_ZN4baseC2Ev(%struct.base* %b) #2, !dbg !38
ret void, !dbg !38
}
; Function Attrs: inlinehint uwtable
define linkonce_odr void @_ZN3fooD2Ev(%struct.foo* %this) unnamed_addr #1 comdat align 2 !dbg !24 {
entry:
%this.addr = alloca %struct.foo*, align 8
store %struct.foo* %this, %struct.foo** %this.addr, align 8
call void @llvm.dbg.declare(metadata %struct.foo** %this.addr, metadata !39, metadata !36), !dbg !40
%this1 = load %struct.foo*, %struct.foo** %this.addr
%b = getelementptr inbounds %struct.foo, %struct.foo* %this1, i32 0, i32 0, !dbg !41
call void @_ZN4baseD1Ev(%struct.base* %b), !dbg !41
ret void, !dbg !43
}
; Function Attrs: nounwind
declare i32 @__cxa_atexit(void (i8*)*, i8*, i8*) #2
; Function Attrs: nounwind readnone
declare void @llvm.dbg.declare(metadata, metadata, metadata) #3
; Function Attrs: inlinehint nounwind uwtable
define linkonce_odr void @_ZN4baseC2Ev(%struct.base* %this) unnamed_addr #0 comdat align 2 !dbg !19 {
entry:
%this.addr = alloca %struct.base*, align 8
store %struct.base* %this, %struct.base** %this.addr, align 8
call void @llvm.dbg.declare(metadata %struct.base** %this.addr, metadata !44, metadata !36), !dbg !46
%this1 = load %struct.base*, %struct.base** %this.addr
%0 = bitcast %struct.base* %this1 to i32 (...)***, !dbg !47
store i32 (...)** bitcast (i8** getelementptr inbounds ([4 x i8*], [4 x i8*]* @_ZTV4base, i64 0, i64 2) to i32 (...)**), i32 (...)*** %0, !dbg !47
ret void, !dbg !47
}
declare void @_ZN4baseD1Ev(%struct.base*) #4
define internal void @_GLOBAL__sub_I_decl_derived_member.cpp() section ".text.startup" {
entry:
call void @__cxx_global_var_init(), !dbg !48
ret void
}
attributes #0 = { inlinehint nounwind 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 = { inlinehint 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 #2 = { nounwind }
attributes #3 = { nounwind readnone }
attributes #4 = { "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" }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!30, !31}
!llvm.ident = !{!32}
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.7.0 (trunk 227104) (llvm/trunk 227103)", isOptimized: false, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !3, globals: !28, imports: !2)
!1 = !DIFile(filename: "decl-derived-member.cpp", directory: "/tmp/dbginfo")
!2 = !{}
!3 = !{!4, !8}
!4 = !DICompositeType(tag: DW_TAG_structure_type, name: "foo", line: 5, size: 64, align: 64, file: !1, elements: !5, identifier: "_ZTS3foo")
!5 = !{!6}
!6 = !DIDerivedType(tag: DW_TAG_member, name: "b", line: 6, size: 64, align: 64, file: !1, scope: !4, baseType: !7)
!7 = !DIDerivedType(tag: DW_TAG_typedef, name: "base_type", line: 4, file: !1, baseType: !8)
!8 = !DICompositeType(tag: DW_TAG_structure_type, name: "base", line: 1, flags: DIFlagFwdDecl, file: !1, identifier: "_ZTS4base")
!10 = distinct !DISubprogram(name: "__cxx_global_var_init", line: 8, isLocal: true, isDefinition: true, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 8, file: !1, scope: !11, type: !12, variables: !2)
!11 = !DIFile(filename: "decl-derived-member.cpp", directory: "/tmp/dbginfo")
!12 = !DISubroutineType(types: !13)
!13 = !{null}
!14 = distinct !DISubprogram(name: "foo", linkageName: "_ZN3fooC2Ev", line: 5, isLocal: false, isDefinition: true, flags: DIFlagArtificial | DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 5, file: !1, scope: !4, type: !15, declaration: !18, variables: !2)
!15 = !DISubroutineType(types: !16)
!16 = !{null, !17}
!17 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer, baseType: !4)
!18 = !DISubprogram(name: "foo", isLocal: false, isDefinition: false, flags: DIFlagArtificial | DIFlagPrototyped, isOptimized: false, scope: !4, type: !15)
!19 = distinct !DISubprogram(name: "base", linkageName: "_ZN4baseC2Ev", line: 1, isLocal: false, isDefinition: true, flags: DIFlagArtificial | DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 1, file: !1, scope: !8, type: !20, declaration: !23, variables: !2)
!20 = !DISubroutineType(types: !21)
!21 = !{null, !22}
!22 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer, baseType: !8)
!23 = !DISubprogram(name: "base", isLocal: false, isDefinition: false, flags: DIFlagArtificial | DIFlagPrototyped, isOptimized: false, scope: !8, type: !20)
!24 = distinct !DISubprogram(name: "~foo", linkageName: "_ZN3fooD2Ev", line: 5, isLocal: false, isDefinition: true, flags: DIFlagArtificial | DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 5, file: !1, scope: !4, type: !15, declaration: !25, variables: !2)
!25 = !DISubprogram(name: "~foo", isLocal: false, isDefinition: false, flags: DIFlagArtificial | DIFlagPrototyped, isOptimized: false, scope: !4, type: !15)
!26 = distinct !DISubprogram(name: "", linkageName: "_GLOBAL__sub_I_decl_derived_member.cpp", isLocal: true, isDefinition: true, flags: DIFlagArtificial, isOptimized: false, unit: !0, file: !1, scope: !11, type: !27, variables: !2)
!27 = !DISubroutineType(types: !2)
!28 = !{!29}
!29 = !DIGlobalVariable(name: "f", line: 8, isLocal: false, isDefinition: true, scope: null, file: !11, type: !4)
!30 = !{i32 2, !"Dwarf Version", i32 4}
!31 = !{i32 2, !"Debug Info Version", i32 3}
!32 = !{!"clang version 3.7.0 (trunk 227104) (llvm/trunk 227103)"}
!33 = !DILocation(line: 8, column: 5, scope: !10)
!34 = !DILocalVariable(name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !14, type: !35)
!35 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !4)
!36 = !DIExpression()
!37 = !DILocation(line: 0, scope: !14)
!38 = !DILocation(line: 5, column: 8, scope: !14)
!39 = !DILocalVariable(name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !24, type: !35)
!40 = !DILocation(line: 0, scope: !24)
!41 = !DILocation(line: 5, column: 8, scope: !42)
!42 = distinct !DILexicalBlock(line: 5, column: 8, file: !1, scope: !24)
!43 = !DILocation(line: 5, column: 8, scope: !24)
!44 = !DILocalVariable(name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !19, type: !45)
!45 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !8)
!46 = !DILocation(line: 0, scope: !19)
!47 = !DILocation(line: 1, column: 8, scope: !19)
!48 = !DILocation(line: 0, scope: !26)
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