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llvm-mirror/test/DebugInfo/COFF/vtable-optzn-array.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

145 lines
8.3 KiB
LLVM
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; RUN: llc < %s -filetype=obj -o - | llvm-readobj - -codeview | FileCheck %s
; We used to crash on this input because UnicodeString is a forward declaration
; with no size. Our array type logic wanted to assert the size of the elements
; times the length matched the overall size.
; C++ source to regenerate:
; struct UnicodeString;
; struct GetFwdDecl {
; static UnicodeString format;
; };
; GetFwdDecl force_fwd_decl;
; struct UnicodeString {
; private:
; virtual ~UnicodeString();
; };
; struct UseCompleteType {
; UseCompleteType();
; ~UseCompleteType();
; UnicodeString currencySpcAfterSym[1];
; };
; UseCompleteType require_complete;
; CHECK: Array ({{.*}}) {
; CHECK-NEXT: TypeLeafKind: LF_ARRAY (0x1503)
; CHECK-NEXT: ElementType: UnicodeString
; CHECK-NEXT: IndexType: unsigned __int64 (0x23)
; CHECK-NEXT: SizeOf: 8
; CHECK-NEXT: Name:
; CHECK-NEXT: }
; ModuleID = 't.cpp'
source_filename = "t.cpp"
target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-pc-windows-msvc"
%struct.GetFwdDecl = type { i8 }
%struct.UseCompleteType = type { [1 x %struct.UnicodeString] }
%struct.UnicodeString = type { i32 (...)** }
$"\01??_DUseCompleteType@@QEAA@XZ" = comdat any
@"\01?force_fwd_decl@@3UGetFwdDecl@@A" = global %struct.GetFwdDecl zeroinitializer, align 1, !dbg !0
@"\01?require_complete@@3UUseCompleteType@@A" = global %struct.UseCompleteType zeroinitializer, align 8, !dbg !6
@llvm.global_ctors = appending global [1 x { i32, void ()*, i8* }] [{ i32, void ()*, i8* } { i32 65535, void ()* @_GLOBAL__sub_I_t.cpp, i8* null }]
; Function Attrs: nounwind
define internal void @"\01??__Erequire_complete@@YAXXZ"() #0 !dbg !27 {
entry:
%call = call %struct.UseCompleteType* @"\01??0UseCompleteType@@QEAA@XZ"(%struct.UseCompleteType* @"\01?require_complete@@3UUseCompleteType@@A"), !dbg !30
%0 = call i32 @atexit(void ()* @"\01??__Frequire_complete@@YAXXZ") #2, !dbg !30
ret void, !dbg !30
}
declare %struct.UseCompleteType* @"\01??0UseCompleteType@@QEAA@XZ"(%struct.UseCompleteType* returned) unnamed_addr #1
; Function Attrs: nounwind
define linkonce_odr void @"\01??_DUseCompleteType@@QEAA@XZ"(%struct.UseCompleteType* %this) unnamed_addr #0 comdat align 2 !dbg !31 {
entry:
%this.addr = alloca %struct.UseCompleteType*, align 8
store %struct.UseCompleteType* %this, %struct.UseCompleteType** %this.addr, align 8
call void @llvm.dbg.declare(metadata %struct.UseCompleteType** %this.addr, metadata !32, metadata !34), !dbg !35
%this1 = load %struct.UseCompleteType*, %struct.UseCompleteType** %this.addr, align 8
call void @"\01??1UseCompleteType@@QEAA@XZ"(%struct.UseCompleteType* %this1), !dbg !36
ret void, !dbg !36
}
; Function Attrs: nounwind
define internal void @"\01??__Frequire_complete@@YAXXZ"() #0 !dbg !37 {
entry:
call void @"\01??_DUseCompleteType@@QEAA@XZ"(%struct.UseCompleteType* @"\01?require_complete@@3UUseCompleteType@@A"), !dbg !38
ret void, !dbg !39
}
; Function Attrs: nounwind
declare i32 @atexit(void ()*) #2
; Function Attrs: nounwind readnone
declare void @llvm.dbg.declare(metadata, metadata, metadata) #3
declare void @"\01??1UseCompleteType@@QEAA@XZ"(%struct.UseCompleteType*) unnamed_addr #1
; Function Attrs: nounwind
define internal void @_GLOBAL__sub_I_t.cpp() #0 !dbg !41 {
entry:
call void @"\01??__Erequire_complete@@YAXXZ"(), !dbg !43
ret void
}
attributes #0 = { nounwind "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-features"="+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-features"="+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #2 = { nounwind }
attributes #3 = { nounwind readnone }
!llvm.dbg.cu = !{!2}
!llvm.module.flags = !{!24, !25}
!llvm.ident = !{!26}
!0 = distinct !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
!1 = !DIGlobalVariable(name: "force_fwd_decl", linkageName: "\01?force_fwd_decl@@3UGetFwdDecl@@A", scope: !2, file: !8, line: 5, type: !21, isLocal: false, isDefinition: true)
!2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "clang version 4.0.0 (trunk 281056) (llvm/trunk 281051)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5)
!3 = !DIFile(filename: "<stdin>", directory: "C:\5Csrc\5Cllvm\5Cbuild")
!4 = !{}
!5 = !{!0, !6}
!6 = distinct !DIGlobalVariableExpression(var: !7, expr: !DIExpression())
!7 = !DIGlobalVariable(name: "require_complete", linkageName: "\01?require_complete@@3UUseCompleteType@@A", scope: !2, file: !8, line: 15, type: !9, isLocal: false, isDefinition: true)
!8 = !DIFile(filename: "t.cpp", directory: "C:\5Csrc\5Cllvm\5Cbuild")
!9 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "UseCompleteType", file: !8, line: 10, size: 64, align: 64, elements: !10, identifier: ".?AUUseCompleteType@@")
!10 = !{!11, !16, !20}
!11 = !DIDerivedType(tag: DW_TAG_member, name: "currencySpcAfterSym", scope: !9, file: !8, line: 13, baseType: !12, size: 64, align: 64)
!12 = !DICompositeType(tag: DW_TAG_array_type, baseType: !13, size: 64, align: 64, elements: !14)
!13 = !DICompositeType(tag: DW_TAG_structure_type, name: "UnicodeString", file: !8, line: 1, flags: DIFlagFwdDecl, identifier: ".?AUUnicodeString@@")
!14 = !{!15}
!15 = !DISubrange(count: 1)
!16 = !DISubprogram(name: "UseCompleteType", scope: !9, file: !8, line: 11, type: !17, isLocal: false, isDefinition: false, scopeLine: 11, flags: DIFlagPrototyped, isOptimized: false)
!17 = !DISubroutineType(types: !18)
!18 = !{null, !19}
!19 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !9, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer)
!20 = !DISubprogram(name: "~UseCompleteType", scope: !9, file: !8, line: 12, type: !17, isLocal: false, isDefinition: false, scopeLine: 12, flags: DIFlagPrototyped, isOptimized: false)
!21 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "GetFwdDecl", file: !8, line: 2, size: 8, align: 8, elements: !22, identifier: ".?AUGetFwdDecl@@")
!22 = !{!23}
!23 = !DIDerivedType(tag: DW_TAG_member, name: "format", scope: !21, file: !8, line: 3, baseType: !13, flags: DIFlagStaticMember)
!24 = !{i32 2, !"CodeView", i32 1}
!25 = !{i32 2, !"Debug Info Version", i32 3}
!26 = !{!"clang version 4.0.0 (trunk 281056) (llvm/trunk 281051)"}
!27 = distinct !DISubprogram(name: "??__Erequire_complete@@YAXXZ", scope: !8, file: !8, line: 15, type: !28, isLocal: true, isDefinition: true, scopeLine: 15, flags: DIFlagPrototyped, isOptimized: false, unit: !2, retainedNodes: !4)
!28 = !DISubroutineType(types: !29)
!29 = !{null}
!30 = !DILocation(line: 15, scope: !27)
!31 = distinct !DISubprogram(name: "~UseCompleteType", linkageName: "\01??_DUseCompleteType@@QEAA@XZ", scope: !9, file: !8, line: 12, type: !17, isLocal: false, isDefinition: true, scopeLine: 15, flags: DIFlagPrototyped, isOptimized: false, unit: !2, declaration: !20, retainedNodes: !4)
!32 = !DILocalVariable(name: "this", arg: 1, scope: !31, type: !33, flags: DIFlagArtificial | DIFlagObjectPointer)
!33 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !9, size: 64, align: 64)
!34 = !DIExpression()
!35 = !DILocation(line: 0, scope: !31)
!36 = !DILocation(line: 15, scope: !31)
!37 = distinct !DISubprogram(name: "??__Frequire_complete@@YAXXZ", scope: !3, file: !3, line: 15, type: !28, isLocal: true, isDefinition: true, scopeLine: 15, flags: DIFlagPrototyped, isOptimized: false, unit: !2, retainedNodes: !4)
!38 = !DILocation(line: 15, scope: !37)
!39 = !DILocation(line: 15, scope: !40)
!40 = !DILexicalBlockFile(scope: !37, file: !8, discriminator: 0)
!41 = distinct !DISubprogram(linkageName: "_GLOBAL__sub_I_t.cpp", scope: !3, file: !3, type: !42, isLocal: true, isDefinition: true, flags: DIFlagArtificial, isOptimized: false, unit: !2, retainedNodes: !4)
!42 = !DISubroutineType(types: !4)
!43 = !DILocation(line: 0, scope: !41)
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