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llvm-mirror/test/DebugInfo/X86/byvalstruct.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

128 lines
9.8 KiB
LLVM
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; RUN: llc -mtriple=x86_64-apple-macosx10.8.0 -O0 -filetype=obj -o %t %s
; RUN: llvm-dwarfdump -v -debug-info %t | FileCheck %s
; Test that we generate debug info for by-value struct args that are not used.
;
; CHECK: DW_TAG_formal_parameter
; CHECK: DW_TAG_formal_parameter
; CHECK: DW_TAG_formal_parameter
; CHECK: DW_TAG_formal_parameter
; CHECK-NOT: DW_TAG
; CHECK: DW_AT_name {{.*}} "info"
;
; generated from
;
; typedef unsigned long NSUInteger;
; typedef struct
; {
; NSUInteger width;
; NSUInteger height;
; double pixelAspect;
; } ImageInfo;
; @implementation Bitmap
; - (id)initWithCopy:(Bitmap *)otherBitmap
; andInfo:(ImageInfo)info
; andLength:(NSUInteger)length
; {
; }
; @end
; ModuleID = 't.mm'
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx10.8.0"
%0 = type opaque
%struct._objc_cache = type opaque
%struct._class_t = type { %struct._class_t*, %struct._class_t*, %struct._objc_cache*, i8* (i8*, i8*)**, %struct._class_ro_t* }
%struct._class_ro_t = type { i32, i32, i32, i8*, i8*, %struct.__method_list_t*, %struct._objc_protocol_list*, %struct._ivar_list_t*, i8*, %struct._prop_list_t* }
%struct.__method_list_t = type { i32, i32, [0 x %struct._objc_method] }
%struct._objc_method = type { i8*, i8*, i8* }
%struct._objc_protocol_list = type { i64, [0 x %struct._protocol_t*] }
%struct._protocol_t = type { i8*, i8*, %struct._objc_protocol_list*, %struct.__method_list_t*, %struct.__method_list_t*, %struct.__method_list_t*, %struct.__method_list_t*, %struct._prop_list_t*, i32, i32, i8** }
%struct._prop_list_t = type { i32, i32, [0 x %struct._prop_t] }
%struct._prop_t = type { i8*, i8* }
%struct._ivar_list_t = type { i32, i32, [0 x %struct._ivar_t] }
%struct._ivar_t = type { i64*, i8*, i8*, i32, i32 }
%struct.ImageInfo = type { i64, i64, double }
@_objc_empty_cache = external global %struct._objc_cache
@_objc_empty_vtable = external global i8* (i8*, i8*)*
@"OBJC_CLASS_$_Bitmap" = global %struct._class_t { %struct._class_t* @"OBJC_METACLASS_$_Bitmap", %struct._class_t* null, %struct._objc_cache* @_objc_empty_cache, i8* (i8*, i8*)** @_objc_empty_vtable, %struct._class_ro_t* @"\01l_OBJC_CLASS_RO_$_Bitmap" }, section "__DATA, __objc_data", align 8
@"OBJC_METACLASS_$_Bitmap" = global %struct._class_t { %struct._class_t* @"OBJC_METACLASS_$_Bitmap", %struct._class_t* @"OBJC_CLASS_$_Bitmap", %struct._objc_cache* @_objc_empty_cache, i8* (i8*, i8*)** @_objc_empty_vtable, %struct._class_ro_t* @"\01l_OBJC_METACLASS_RO_$_Bitmap" }, section "__DATA, __objc_data", align 8
@"\01L_OBJC_CLASS_NAME_" = internal global [7 x i8] c"Bitmap\00", section "__TEXT,__objc_classname,cstring_literals", align 1
@"\01l_OBJC_METACLASS_RO_$_Bitmap" = internal global %struct._class_ro_t { i32 3, i32 40, i32 40, i8* null, i8* getelementptr inbounds ([7 x i8], [7 x i8]* @"\01L_OBJC_CLASS_NAME_", i32 0, i32 0), %struct.__method_list_t* null, %struct._objc_protocol_list* null, %struct._ivar_list_t* null, i8* null, %struct._prop_list_t* null }, section "__DATA, __objc_const", align 8
@"\01L_OBJC_METH_VAR_NAME_" = internal global [32 x i8] c"initWithCopy:andInfo:andLength:\00", section "__TEXT,__objc_methname,cstring_literals", align 1
@"\01L_OBJC_METH_VAR_TYPE_" = internal global [23 x i8] c"@56@0:8@16{?=QQd}24Q48\00", section "__TEXT,__objc_methtype,cstring_literals", align 1
@"\01l_OBJC_$_INSTANCE_METHODS_Bitmap" = internal global { i32, i32, [1 x %struct._objc_method] } { i32 24, i32 1, [1 x %struct._objc_method] [%struct._objc_method { i8* getelementptr inbounds ([32 x i8], [32 x i8]* @"\01L_OBJC_METH_VAR_NAME_", i32 0, i32 0), i8* getelementptr inbounds ([23 x i8], [23 x i8]* @"\01L_OBJC_METH_VAR_TYPE_", i32 0, i32 0), i8* bitcast (i8* (%0*, i8*, %0*, %struct.ImageInfo*, i64)* @"\01-[Bitmap initWithCopy:andInfo:andLength:]" to i8*) }] }, section "__DATA, __objc_const", align 8
@"\01l_OBJC_CLASS_RO_$_Bitmap" = internal global %struct._class_ro_t { i32 2, i32 0, i32 0, i8* null, i8* getelementptr inbounds ([7 x i8], [7 x i8]* @"\01L_OBJC_CLASS_NAME_", i32 0, i32 0), %struct.__method_list_t* bitcast ({ i32, i32, [1 x %struct._objc_method] }* @"\01l_OBJC_$_INSTANCE_METHODS_Bitmap" to %struct.__method_list_t*), %struct._objc_protocol_list* null, %struct._ivar_list_t* null, i8* null, %struct._prop_list_t* null }, section "__DATA, __objc_const", align 8
@"\01L_OBJC_LABEL_CLASS_$" = internal global [1 x i8*] [i8* bitcast (%struct._class_t* @"OBJC_CLASS_$_Bitmap" to i8*)], section "__DATA, __objc_classlist, regular, no_dead_strip", align 8
@llvm.used = appending global [5 x i8*] [i8* getelementptr inbounds ([7 x i8], [7 x i8]* @"\01L_OBJC_CLASS_NAME_", i32 0, i32 0), i8* getelementptr inbounds ([32 x i8], [32 x i8]* @"\01L_OBJC_METH_VAR_NAME_", i32 0, i32 0), i8* getelementptr inbounds ([23 x i8], [23 x i8]* @"\01L_OBJC_METH_VAR_TYPE_", i32 0, i32 0), i8* bitcast ({ i32, i32, [1 x %struct._objc_method] }* @"\01l_OBJC_$_INSTANCE_METHODS_Bitmap" to i8*), i8* bitcast ([1 x i8*]* @"\01L_OBJC_LABEL_CLASS_$" to i8*)], section "llvm.metadata"
; Function Attrs: ssp uwtable
define internal i8* @"\01-[Bitmap initWithCopy:andInfo:andLength:]"(%0* %self, i8* %_cmd, %0* %otherBitmap, %struct.ImageInfo* byval align 8 %info, i64 %length) #0 !dbg !7 {
entry:
%retval = alloca i8*, align 8
%self.addr = alloca %0*, align 8
%_cmd.addr = alloca i8*, align 8
%otherBitmap.addr = alloca %0*, align 8
%length.addr = alloca i64, align 8
store %0* %self, %0** %self.addr, align 8
call void @llvm.dbg.declare(metadata %0** %self.addr, metadata !28, metadata !DIExpression()), !dbg !29
store i8* %_cmd, i8** %_cmd.addr, align 8
call void @llvm.dbg.declare(metadata i8** %_cmd.addr, metadata !30, metadata !DIExpression()), !dbg !29
store %0* %otherBitmap, %0** %otherBitmap.addr, align 8
call void @llvm.dbg.declare(metadata %0** %otherBitmap.addr, metadata !32, metadata !DIExpression()), !dbg !29
call void @llvm.dbg.declare(metadata %struct.ImageInfo* %info, metadata !33, metadata !DIExpression()), !dbg !34
store i64 %length, i64* %length.addr, align 8
call void @llvm.dbg.declare(metadata i64* %length.addr, metadata !35, metadata !DIExpression()), !dbg !36
%0 = load i8*, i8** %retval, !dbg !37
ret i8* %0, !dbg !37
}
; Function Attrs: nounwind readnone
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
attributes #0 = { ssp uwtable }
attributes #1 = { nounwind readnone }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!24, !25, !26, !27, !38}
!0 = distinct !DICompileUnit(language: DW_LANG_ObjC_plus_plus, producer: "clang version 3.4 ", isOptimized: false, runtimeVersion: 2, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !3, globals: !2, imports: !2)
!1 = !DIFile(filename: "t.mm", directory: "")
!2 = !{}
!3 = !{!4}
!4 = !DICompositeType(tag: DW_TAG_structure_type, name: "Bitmap", line: 8, size: 8, align: 8, flags: DIFlagObjcClassComplete, runtimeLang: DW_LANG_ObjC_plus_plus, file: !1, scope: !5, elements: !2)
!5 = !DIFile(filename: "t.mm", directory: "")
!7 = distinct !DISubprogram(name: "-[Bitmap initWithCopy:andInfo:andLength:]", line: 9, isLocal: true, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 9, file: !1, scope: !5, type: !8, retainedNodes: !2)
!8 = !DISubroutineType(types: !9)
!9 = !{!4, !10, !11, !14, !15, !19}
!10 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer, baseType: !4)
!11 = !DIDerivedType(tag: DW_TAG_typedef, name: "SEL", line: 9, flags: DIFlagArtificial, file: !1, baseType: !12)
!12 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !13)
!13 = !DICompositeType(tag: DW_TAG_structure_type, name: "objc_selector", flags: DIFlagFwdDecl, file: !1)
!14 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !4)
!15 = !DIDerivedType(tag: DW_TAG_typedef, name: "ImageInfo", line: 7, file: !1, baseType: !16)
!16 = !DICompositeType(tag: DW_TAG_structure_type, line: 2, size: 192, align: 64, file: !1, elements: !17)
!17 = !{!18, !21, !22}
!18 = !DIDerivedType(tag: DW_TAG_member, name: "width", line: 4, size: 64, align: 64, file: !1, scope: !16, baseType: !19)
!19 = !DIDerivedType(tag: DW_TAG_typedef, name: "NSUInteger", line: 1, file: !1, baseType: !20)
!20 = !DIBasicType(tag: DW_TAG_base_type, name: "long unsigned int", size: 64, align: 64, encoding: DW_ATE_unsigned)
!21 = !DIDerivedType(tag: DW_TAG_member, name: "height", line: 5, size: 64, align: 64, offset: 64, file: !1, scope: !16, baseType: !19)
!22 = !DIDerivedType(tag: DW_TAG_member, name: "pixelAspect", line: 6, size: 64, align: 64, offset: 128, file: !1, scope: !16, baseType: !23)
!23 = !DIBasicType(tag: DW_TAG_base_type, name: "double", size: 64, align: 64, encoding: DW_ATE_float)
!24 = !{i32 1, !"Objective-C Version", i32 2}
!25 = !{i32 1, !"Objective-C Image Info Version", i32 0}
!26 = !{i32 1, !"Objective-C Image Info Section", !"__DATA, __objc_imageinfo, regular, no_dead_strip"}
!27 = !{i32 4, !"Objective-C Garbage Collection", i32 0}
!28 = !DILocalVariable(name: "self", line: 9, arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !7, file: !5, type: !14)
!29 = !DILocation(line: 9, scope: !7)
!30 = !DILocalVariable(name: "_cmd", line: 9, arg: 2, flags: DIFlagArtificial, scope: !7, file: !5, type: !31)
!31 = !DIDerivedType(tag: DW_TAG_typedef, name: "SEL", line: 9, file: !1, baseType: !12)
!32 = !DILocalVariable(name: "otherBitmap", line: 9, arg: 3, scope: !7, file: !5, type: !14)
!33 = !DILocalVariable(name: "info", line: 10, arg: 4, scope: !7, file: !5, type: !15)
!34 = !DILocation(line: 10, scope: !7)
!35 = !DILocalVariable(name: "length", line: 11, arg: 5, scope: !7, file: !5, type: !19)
!36 = !DILocation(line: 11, scope: !7)
!37 = !DILocation(line: 13, scope: !7)
!38 = !{i32 1, !"Debug Info Version", i32 3}
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