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llvm-mirror/test/DebugInfo/X86/decl-derived-member.ll
Adrian Prantl 7d6813a6c8 Canonicalize the representation of empty an expression in DIGlobalVariableExpression 
This change simplifies code that has to deal with
DIGlobalVariableExpression and mirrors how we treat DIExpressions in
debug info intrinsics. Before this change there were two ways of
representing empty expressions on globals, a nullptr and an empty
!DIExpression().

If someone needs to upgrade out-of-tree testcases:
  perl -pi -e 's/(!DIGlobalVariableExpression\(var: ![0-9]*)\)/\1, expr: !DIExpression())/g' <MYTEST.ll>
will catch 95%.

llvm-svn: 312144
2017-08-30 18:06:51 +00:00

154 lines
8.6 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
source_filename = "test/DebugInfo/X86/decl-derived-member.ll"
%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 !0
@__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 !15 {
entry:
call void @_ZN3fooC2Ev(%struct.foo* @f) #2, !dbg !18
%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 !18
ret void, !dbg !18
}
; Function Attrs: inlinehint nounwind uwtable
define linkonce_odr void @_ZN3fooC2Ev(%struct.foo* %this) unnamed_addr #0 comdat align 2 !dbg !19 {
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 !24, metadata !26), !dbg !27
%this1 = load %struct.foo*, %struct.foo** %this.addr
%b = getelementptr inbounds %struct.foo, %struct.foo* %this1, i32 0, i32 0, !dbg !28
call void @_ZN4baseC2Ev(%struct.base* %b) #2, !dbg !28
ret void, !dbg !28
}
; Function Attrs: inlinehint uwtable
define linkonce_odr void @_ZN3fooD2Ev(%struct.foo* %this) unnamed_addr #1 comdat align 2 !dbg !29 {
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 !31, metadata !26), !dbg !32
%this1 = load %struct.foo*, %struct.foo** %this.addr
%b = getelementptr inbounds %struct.foo, %struct.foo* %this1, i32 0, i32 0, !dbg !33
call void @_ZN4baseD1Ev(%struct.base* %b), !dbg !33
ret void, !dbg !35
}
; 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 !36 {
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 !41, metadata !26), !dbg !43
%this1 = load %struct.base*, %struct.base** %this.addr
%0 = bitcast %struct.base* %this1 to i32 (...)***, !dbg !44
store i32 (...)** bitcast (i8** getelementptr inbounds ([4 x i8*], [4 x i8*]* @_ZTV4base, i64 0, i64 2) to i32 (...)**), i32 (...)*** %0, !dbg !44
ret void, !dbg !44
}
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 !45
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 = !{!8}
!llvm.module.flags = !{!12, !13}
!llvm.ident = !{!14}
!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
!1 = !DIGlobalVariable(name: "f", scope: null, file: !2, line: 8, type: !3, isLocal: false, isDefinition: true)
!2 = !DIFile(filename: "decl-derived-member.cpp", directory: "/tmp/dbginfo")
!3 = !DICompositeType(tag: DW_TAG_structure_type, name: "foo", file: !2, line: 5, size: 64, align: 64, elements: !4, identifier: "_ZTS3foo")
!4 = !{!5}
!5 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !3, file: !2, line: 6, baseType: !6, size: 64, align: 64)
!6 = !DIDerivedType(tag: DW_TAG_typedef, name: "base_type", file: !2, line: 4, baseType: !7)
!7 = !DICompositeType(tag: DW_TAG_structure_type, name: "base", file: !2, line: 1, flags: DIFlagFwdDecl, identifier: "_ZTS4base")
!8 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !2, producer: "clang version 3.7.0 (trunk 227104) (llvm/trunk 227103)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !9, retainedTypes: !10, globals: !11, imports: !9)
!9 = !{}
!10 = !{!3, !7}
!11 = !{!0}
!12 = !{i32 2, !"Dwarf Version", i32 4}
!13 = !{i32 2, !"Debug Info Version", i32 3}
!14 = !{!"clang version 3.7.0 (trunk 227104) (llvm/trunk 227103)"}
!15 = distinct !DISubprogram(name: "__cxx_global_var_init", scope: !2, file: !2, line: 8, type: !16, isLocal: true, isDefinition: true, scopeLine: 8, flags: DIFlagPrototyped, isOptimized: false, unit: !8, variables: !9)
!16 = !DISubroutineType(types: !17)
!17 = !{null}
!18 = !DILocation(line: 8, column: 5, scope: !15)
!19 = distinct !DISubprogram(name: "foo", linkageName: "_ZN3fooC2Ev", scope: !3, file: !2, line: 5, type: !20, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagArtificial | DIFlagPrototyped, isOptimized: false, unit: !8, declaration: !23, variables: !9)
!20 = !DISubroutineType(types: !21)
!21 = !{null, !22}
!22 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !3, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer)
!23 = !DISubprogram(name: "foo", scope: !3, type: !20, isLocal: false, isDefinition: false, flags: DIFlagArtificial | DIFlagPrototyped, isOptimized: false)
!24 = !DILocalVariable(name: "this", arg: 1, scope: !19, type: !25, flags: DIFlagArtificial | DIFlagObjectPointer)
!25 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !3, size: 64, align: 64)
!26 = !DIExpression()
!27 = !DILocation(line: 0, scope: !19)
!28 = !DILocation(line: 5, column: 8, scope: !19)
!29 = distinct !DISubprogram(name: "~foo", linkageName: "_ZN3fooD2Ev", scope: !3, file: !2, line: 5, type: !20, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagArtificial | DIFlagPrototyped, isOptimized: false, unit: !8, declaration: !30, variables: !9)
!30 = !DISubprogram(name: "~foo", scope: !3, type: !20, isLocal: false, isDefinition: false, flags: DIFlagArtificial | DIFlagPrototyped, isOptimized: false)
!31 = !DILocalVariable(name: "this", arg: 1, scope: !29, type: !25, flags: DIFlagArtificial | DIFlagObjectPointer)
!32 = !DILocation(line: 0, scope: !29)
!33 = !DILocation(line: 5, column: 8, scope: !34)
!34 = distinct !DILexicalBlock(scope: !29, file: !2, line: 5, column: 8)
!35 = !DILocation(line: 5, column: 8, scope: !29)
!36 = distinct !DISubprogram(name: "base", linkageName: "_ZN4baseC2Ev", scope: !7, file: !2, line: 1, type: !37, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagArtificial | DIFlagPrototyped, isOptimized: false, unit: !8, declaration: !40, variables: !9)
!37 = !DISubroutineType(types: !38)
!38 = !{null, !39}
!39 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !7, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer)
!40 = !DISubprogram(name: "base", scope: !7, type: !37, isLocal: false, isDefinition: false, flags: DIFlagArtificial | DIFlagPrototyped, isOptimized: false)
!41 = !DILocalVariable(name: "this", arg: 1, scope: !36, type: !42, flags: DIFlagArtificial | DIFlagObjectPointer)
!42 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !7, size: 64, align: 64)
!43 = !DILocation(line: 0, scope: !36)
!44 = !DILocation(line: 1, column: 8, scope: !36)
!45 = !DILocation(line: 0, scope: !46)
!46 = distinct !DISubprogram(linkageName: "_GLOBAL__sub_I_decl_derived_member.cpp", scope: !2, file: !2, type: !47, isLocal: true, isDefinition: true, flags: DIFlagArtificial, isOptimized: false, unit: !8, variables: !9)
!47 = !DISubroutineType(types: !9)
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