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llvm-mirror/test/DebugInfo/Generic/namespace.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

366 lines
16 KiB
LLVM

; REQUIRES: object-emission
; RUN: %llc_dwarf -O0 -filetype=obj -dwarf-linkage-names=All < %s | llvm-dwarfdump -v - | FileCheck %s
; CHECK: debug_info contents
; CHECK: DW_AT_name{{.*}}= [[F1:.*]])
; CHECK: [[NS1:0x[0-9a-f]*]]:{{ *}}DW_TAG_namespace
; CHECK-NOT: DW_AT_decl_file
; CHECK-NOT: DW_AT_decl_line
; CHECK-NOT: NULL
; CHECK: [[NS2:0x[0-9a-f]*]]:{{ *}}DW_TAG_namespace
; CHECK-NEXT: DW_AT_name{{.*}} = "B"
; CHECK-NOT: DW_AT_decl_file
; CHECK-NOT: DW_AT_decl_line
; CHECK-NOT: NULL
; CHECK: [[I:0x[0-9a-f]*]]:{{ *}}DW_TAG_variable
; CHECK-NEXT: DW_AT_name{{.*}}= "i"
; CHECK: [[VAR_FWD:0x[0-9a-f]*]]:{{ *}}DW_TAG_variable
; CHECK-NEXT: DW_AT_name{{.*}}= "var_fwd"
; CHECK-NOT: NULL
; CHECK: [[FOO:0x[0-9a-f]*]]:{{ *}}DW_TAG_structure_type
; CHECK-NEXT: DW_AT_name{{.*}}= "foo"
; CHECK-NEXT: DW_AT_declaration
; CHECK-NOT: NULL
; CHECK: [[BAR:0x[0-9a-f]*]]:{{ *}}DW_TAG_structure_type
; CHECK-NEXT: DW_AT_name{{.*}}= "bar"
; CHECK: DW_TAG_subprogram
; CHECK-NOT: DW_TAG
; CHECK: DW_AT_MIPS_linkage_name
; CHECK-NOT: DW_TAG
; CHECK: DW_AT_name{{.*}}= "f1"
; CHECK: [[FUNC1:.*]]: DW_TAG_subprogram
; CHECK-NOT: DW_TAG
; CHECK: DW_AT_MIPS_linkage_name
; CHECK-NOT: DW_TAG
; CHECK: DW_AT_name{{.*}}= "f1"
; CHECK: [[BAZ:0x[0-9a-f]*]]:{{.*}}DW_TAG_typedef
; CHECK-NOT: DW_TAG
; CHECK: DW_AT_name{{.*}}= "baz"
; CHECK: [[VAR_DECL:0x[0-9a-f]*]]:{{.*}}DW_TAG_variable
; CHECK-NOT: DW_TAG
; CHECK: DW_AT_name{{.*}}= "var_decl"
; CHECK-NOT: DW_TAG
; CHECK: DW_AT_declaration
; CHECK: [[FUNC_DECL:0x[0-9a-f]*]]:{{.*}}DW_TAG_subprogram
; CHECK-NOT: DW_TAG
; CHECK: DW_AT_name{{.*}}= "func_decl"
; CHECK-NOT: DW_TAG
; CHECK: DW_AT_declaration
; CHECK: [[FUNC_FWD:0x[0-9a-f]*]]:{{.*}}DW_TAG_subprogram
; CHECK-NOT: DW_TAG
; CHECK: DW_AT_name{{.*}}= "func_fwd"
; CHECK-NOT: DW_AT_declaration
; CHECK: NULL
; CHECK-NOT: NULL
; CHECK: DW_TAG_imported_module
; CHECK-NEXT: DW_AT_decl_file{{.*}}([[F2:.*]])
; CHECK-NEXT: DW_AT_decl_line{{.*}}(15)
; CHECK-NEXT: DW_AT_import{{.*}}=> {[[NS2]]})
; CHECK: NULL
; CHECK-NOT: NULL
; CHECK: DW_TAG_imported_module
; CHECK-NEXT: DW_AT_decl_file{{.*}}([[F2:.*]])
; CHECK-NEXT: DW_AT_decl_line{{.*}}(18)
; CHECK-NEXT: DW_AT_import{{.*}}=> {[[NS1]]})
; CHECK-NOT: NULL
; CHECK: DW_TAG_subprogram
; CHECK-NOT: {{DW_TAG|NULL}}
; CHECK: DW_TAG_subprogram
; CHECK-NOT: DW_TAG
; CHECK: DW_AT_MIPS_linkage_name
; CHECK-NOT: DW_TAG
; CHECK: DW_AT_name{{.*}}= "func"
; CHECK-NOT: NULL
; CHECK: DW_TAG_imported_module
; CHECK-NEXT: DW_AT_decl_file{{.*}}([[F2:.*]])
; CHECK-NEXT: DW_AT_decl_line{{.*}}(26)
; CHECK-NEXT: DW_AT_import{{.*}}=> {[[NS1]]})
; CHECK-NOT: NULL
; CHECK: DW_TAG_imported_declaration
; CHECK-NEXT: DW_AT_decl_file{{.*}}([[F2]])
; CHECK-NEXT: DW_AT_decl_line{{.*}}(27)
; CHECK-NEXT: DW_AT_import{{.*}}=> {[[FOO]]})
; CHECK-NOT: NULL
; CHECK: DW_TAG_imported_declaration
; CHECK-NEXT: DW_AT_decl_file{{.*}}([[F2]])
; CHECK-NEXT: DW_AT_decl_line{{.*}}(28)
; CHECK-NEXT: DW_AT_import{{.*}}=> {[[BAR]]})
; CHECK-NOT: NULL
; CHECK: DW_TAG_imported_declaration
; CHECK-NEXT: DW_AT_decl_file{{.*}}([[F2]])
; CHECK-NEXT: DW_AT_decl_line{{.*}}(29)
; CHECK-NEXT: DW_AT_import{{.*}}=> {[[FUNC1]]})
; CHECK-NOT: NULL
; CHECK: DW_TAG_imported_declaration
; CHECK-NEXT: DW_AT_decl_file{{.*}}([[F2]])
; CHECK-NEXT: DW_AT_decl_line{{.*}}(30)
; CHECK-NEXT: DW_AT_import{{.*}}=> {[[I]]})
; CHECK-NOT: NULL
; CHECK: DW_TAG_imported_declaration
; CHECK-NEXT: DW_AT_decl_file{{.*}}([[F2]])
; CHECK-NEXT: DW_AT_decl_line{{.*}}(31)
; CHECK-NEXT: DW_AT_import{{.*}}=> {[[BAZ]]})
; CHECK-NOT: NULL
; CHECK: [[X:0x[0-9a-f]*]]:{{ *}}DW_TAG_imported_declaration
; CHECK-NEXT: DW_AT_decl_file{{.*}}([[F2]])
; CHECK-NEXT: DW_AT_decl_line{{.*}}(32)
; CHECK-NEXT: DW_AT_import{{.*}}=> {[[NS1]]})
; CHECK-NEXT: DW_AT_name{{.*}}"X"
; CHECK-NOT: NULL
; CHECK: DW_TAG_imported_declaration
; CHECK-NEXT: DW_AT_decl_file{{.*}}([[F2]])
; CHECK-NEXT: DW_AT_decl_line{{.*}}(33)
; CHECK-NEXT: DW_AT_import{{.*}}=> {[[X]]})
; CHECK-NEXT: DW_AT_name{{.*}}"Y"
; CHECK-NOT: NULL
; CHECK: DW_TAG_imported_declaration
; CHECK-NEXT: DW_AT_decl_file{{.*}}([[F2]])
; CHECK-NEXT: DW_AT_decl_line{{.*}}(34)
; CHECK-NEXT: DW_AT_import{{.*}}=> {[[VAR_DECL]]})
; CHECK: DW_TAG_imported_declaration
; CHECK-NEXT: DW_AT_decl_file{{.*}}([[F2]])
; CHECK-NEXT: DW_AT_decl_line{{.*}}(35)
; CHECK-NEXT: DW_AT_import{{.*}}=> {[[FUNC_DECL]]})
; CHECK: DW_TAG_imported_declaration
; CHECK-NEXT: DW_AT_decl_file{{.*}}([[F2]])
; CHECK-NEXT: DW_AT_decl_line{{.*}}(36)
; CHECK-NEXT: DW_AT_import{{.*}}=> {[[VAR_FWD]]})
; CHECK: DW_TAG_imported_declaration
; CHECK-NEXT: DW_AT_decl_file{{.*}}([[F2]])
; CHECK-NEXT: DW_AT_decl_line{{.*}}(37)
; CHECK-NEXT: DW_AT_import{{.*}}=> {[[FUNC_FWD]]})
; CHECK: DW_TAG_lexical_block
; CHECK-NOT: NULL
; CHECK: DW_TAG_imported_module
; CHECK-NEXT: DW_AT_decl_file{{.*}}([[F2]])
; CHECK-NEXT: DW_AT_decl_line{{.*}}(23)
; CHECK-NEXT: DW_AT_import{{.*}}=>
; CHECK: NULL
; CHECK: NULL
; CHECK: NULL
; IR generated from clang/test/CodeGenCXX/debug-info-namespace.cpp, file paths
; changed to protect the guilty. The C++ source code is:
; // RUN...
; // RUN...
; // RUN...
;
; namespace A {
; #line 1 "foo.cpp"
; namespace B {
; extern int i;
; int f1() { return 0; }
; void f1(int) { }
; struct foo;
; struct bar { };
; typedef bar baz;
; extern int var_decl;
; void func_decl(void);
; extern int var_fwd;
; void func_fwd(void);
; }
; }
; namespace A {
; using namespace B;
; }
;
; using namespace A;
; namespace E = A;
; int B::i = f1();
; int func(bool b) {
; if (b) {
; using namespace A::B;
; return i;
; }
; using namespace A;
; using B::foo;
; using B::bar;
; using B::f1;
; using B::i;
; using B::baz;
; namespace X = A;
; namespace Y = X;
; using B::var_decl;
; using B::func_decl;
; using B::var_fwd;
; using B::func_fwd;
; return i + X::B::i + Y::B::i;
; }
;
; namespace A {
; using B::i;
; namespace B {
; int var_fwd = i;
; }
; }
; void B::func_fwd() {}
@_ZN1A1B1iE = global i32 0, align 4, !dbg !131
@_ZN1A1B7var_fwdE = global i32 0, align 4, !dbg !132
@llvm.global_ctors = appending global [1 x { i32, void ()*, i8* }] [{ i32, void ()*, i8* } { i32 65535, void ()* @_GLOBAL__sub_I_debug_info_namespace.cpp, i8* null }]
; Function Attrs: nounwind ssp uwtable
define i32 @_ZN1A1B2f1Ev() #0 !dbg !10 {
entry:
ret i32 0, !dbg !60
}
; Function Attrs: nounwind ssp uwtable
define void @_ZN1A1B2f1Ei(i32) #0 !dbg !14 {
entry:
%.addr = alloca i32, align 4
store i32 %0, i32* %.addr, align 4
call void @llvm.dbg.declare(metadata i32* %.addr, metadata !61, metadata !62), !dbg !63
ret void, !dbg !64
}
; Function Attrs: nounwind readnone
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
define internal void @__cxx_global_var_init() section "__TEXT,__StaticInit,regular,pure_instructions" !dbg !17 {
entry:
%call = call i32 @_ZN1A1B2f1Ev(), !dbg !65
store i32 %call, i32* @_ZN1A1B1iE, align 4, !dbg !65
ret void, !dbg !65
}
; Function Attrs: nounwind ssp uwtable
define i32 @_Z4funcb(i1 zeroext %b) #0 !dbg !21 {
entry:
%retval = alloca i32, align 4
%b.addr = alloca i8, align 1
%frombool = zext i1 %b to i8
store i8 %frombool, i8* %b.addr, align 1
call void @llvm.dbg.declare(metadata i8* %b.addr, metadata !66, metadata !62), !dbg !67
%0 = load i8, i8* %b.addr, align 1, !dbg !68
%tobool = trunc i8 %0 to i1, !dbg !68
br i1 %tobool, label %if.then, label %if.end, !dbg !68
if.then: ; preds = %entry
%1 = load i32, i32* @_ZN1A1B1iE, align 4, !dbg !69
store i32 %1, i32* %retval, !dbg !69
br label %return, !dbg !69
if.end: ; preds = %entry
%2 = load i32, i32* @_ZN1A1B1iE, align 4, !dbg !70
%3 = load i32, i32* @_ZN1A1B1iE, align 4, !dbg !70
%add = add nsw i32 %2, %3, !dbg !70
%4 = load i32, i32* @_ZN1A1B1iE, align 4, !dbg !70
%add1 = add nsw i32 %add, %4, !dbg !70
store i32 %add1, i32* %retval, !dbg !70
br label %return, !dbg !70
return: ; preds = %if.end, %if.then
%5 = load i32, i32* %retval, !dbg !71
ret i32 %5, !dbg !71
}
define internal void @__cxx_global_var_init1() section "__TEXT,__StaticInit,regular,pure_instructions" !dbg !25 {
entry:
%0 = load i32, i32* @_ZN1A1B1iE, align 4, !dbg !72
store i32 %0, i32* @_ZN1A1B7var_fwdE, align 4, !dbg !72
ret void, !dbg !72
}
; Function Attrs: nounwind ssp uwtable
define void @_ZN1A1B8func_fwdEv() #0 !dbg !26 {
entry:
ret void, !dbg !73
}
define internal void @_GLOBAL__sub_I_debug_info_namespace.cpp() section "__TEXT,__StaticInit,regular,pure_instructions" {
entry:
call void @__cxx_global_var_init(), !dbg !74
call void @__cxx_global_var_init1(), !dbg !74
ret void, !dbg !74
}
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 = !{!57, !58}
!llvm.ident = !{!59}
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.6.0 ", isOptimized: false, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !3, globals: !30, imports: !33)
!1 = !DIFile(filename: "debug-info-namespace.cpp", directory: "/tmp")
!2 = !{}
!3 = !{!4, !8}
!4 = !DICompositeType(tag: DW_TAG_structure_type, name: "foo", line: 5, flags: DIFlagFwdDecl, file: !5, scope: !6, identifier: "_ZTSN1A1B3fooE")
!5 = !DIFile(filename: "foo.cpp", directory: "/tmp")
!6 = !DINamespace(name: "B", scope: !7)
!7 = !DINamespace(name: "A", scope: null)
!8 = !DICompositeType(tag: DW_TAG_structure_type, name: "bar", line: 6, size: 8, align: 8, file: !5, scope: !6, elements: !2, identifier: "_ZTSN1A1B3barE")
!10 = distinct !DISubprogram(name: "f1", linkageName: "_ZN1A1B2f1Ev", line: 3, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 3, file: !5, scope: !6, type: !11, retainedNodes: !2)
!11 = !DISubroutineType(types: !12)
!12 = !{!13}
!13 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!14 = distinct !DISubprogram(name: "f1", linkageName: "_ZN1A1B2f1Ei", line: 4, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 4, file: !5, scope: !6, type: !15, retainedNodes: !2)
!15 = !DISubroutineType(types: !16)
!16 = !{null, !13}
!17 = distinct !DISubprogram(name: "__cxx_global_var_init", line: 20, isLocal: true, isDefinition: true, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 20, file: !5, scope: !18, type: !19, retainedNodes: !2)
!18 = !DIFile(filename: "foo.cpp", directory: "/tmp")
!19 = !DISubroutineType(types: !20)
!20 = !{null}
!21 = distinct !DISubprogram(name: "func", linkageName: "_Z4funcb", line: 21, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 21, file: !5, scope: !18, type: !22, retainedNodes: !2)
!22 = !DISubroutineType(types: !23)
!23 = !{!13, !24}
!24 = !DIBasicType(tag: DW_TAG_base_type, name: "bool", size: 8, align: 8, encoding: DW_ATE_boolean)
!25 = distinct !DISubprogram(name: "__cxx_global_var_init1", line: 44, isLocal: true, isDefinition: true, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 44, file: !5, scope: !18, type: !19, retainedNodes: !2)
!26 = distinct !DISubprogram(name: "func_fwd", linkageName: "_ZN1A1B8func_fwdEv", line: 47, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 47, file: !5, scope: !6, type: !19, retainedNodes: !2)
!27 = distinct !DISubprogram(name: "", linkageName: "_GLOBAL__sub_I_debug_info_namespace.cpp", isLocal: true, isDefinition: true, flags: DIFlagArtificial, isOptimized: false, unit: !0, file: !1, scope: !28, type: !29, retainedNodes: !2)
!28 = !DIFile(filename: "debug-info-namespace.cpp", directory: "/tmp")
!29 = !DISubroutineType(types: !2)
!30 = !{!131, !132}
!31 = !DIGlobalVariable(name: "i", linkageName: "_ZN1A1B1iE", line: 20, isLocal: false, isDefinition: true, scope: !6, file: !18, type: !13)
!32 = !DIGlobalVariable(name: "var_fwd", linkageName: "_ZN1A1B7var_fwdE", line: 44, isLocal: false, isDefinition: true, scope: !6, file: !18, type: !13)
!33 = !{!34, !35, !36, !37, !40, !41, !42, !43, !44, !45, !47, !48, !49, !51, !54, !55, !56}
!34 = !DIImportedEntity(tag: DW_TAG_imported_module, file: !5, line: 15, scope: !7, entity: !6)
!35 = !DIImportedEntity(tag: DW_TAG_imported_module, file: !5, line: 18, scope: !0, entity: !7)
!36 = !DIImportedEntity(tag: DW_TAG_imported_declaration, file: !5, line: 19, name: "E", scope: !0, entity: !7)
!37 = !DIImportedEntity(tag: DW_TAG_imported_module, file: !5, line: 23, scope: !38, entity: !6)
!38 = distinct !DILexicalBlock(line: 22, column: 10, file: !5, scope: !39)
!39 = distinct !DILexicalBlock(line: 22, column: 7, file: !5, scope: !21)
!40 = !DIImportedEntity(tag: DW_TAG_imported_module, file: !5, line: 26, scope: !21, entity: !7)
!41 = !DIImportedEntity(tag: DW_TAG_imported_declaration, file: !5, line: 27, scope: !21, entity: !4)
!42 = !DIImportedEntity(tag: DW_TAG_imported_declaration, file: !5, line: 28, scope: !21, entity: !8)
!43 = !DIImportedEntity(tag: DW_TAG_imported_declaration, file: !5, line: 29, scope: !21, entity: !14)
!44 = !DIImportedEntity(tag: DW_TAG_imported_declaration, file: !5, line: 30, scope: !21, entity: !31)
!45 = !DIImportedEntity(tag: DW_TAG_imported_declaration, file: !5, line: 31, scope: !21, entity: !46)
!46 = !DIDerivedType(tag: DW_TAG_typedef, name: "baz", line: 7, file: !5, scope: !6, baseType: !8)
!47 = !DIImportedEntity(tag: DW_TAG_imported_declaration, file: !5, line: 32, name: "X", scope: !21, entity: !7)
!48 = !DIImportedEntity(tag: DW_TAG_imported_declaration, file: !5, line: 33, name: "Y", scope: !21, entity: !47)
!49 = !DIImportedEntity(tag: DW_TAG_imported_declaration, file: !5, line: 34, scope: !21, entity: !50)
!50 = !DIGlobalVariable(name: "var_decl", linkageName: "_ZN1A1B8var_declE", line: 8, isLocal: false, isDefinition: false, scope: !6, file: !18, type: !13)
!51 = !DIImportedEntity(tag: DW_TAG_imported_declaration, file: !5, line: 35, scope: !21, entity: !52)
!52 = !DISubprogram(name: "func_decl", linkageName: "_ZN1A1B9func_declEv", line: 9, isLocal: false, isDefinition: false, flags: DIFlagPrototyped, isOptimized: false, file: !5, scope: !6, type: !19, retainedNodes: !53)
!53 = !{} ; previously: invalid DW_TAG_base_type
!54 = !DIImportedEntity(tag: DW_TAG_imported_declaration, file: !5, line: 36, scope: !21, entity: !32)
!55 = !DIImportedEntity(tag: DW_TAG_imported_declaration, file: !5, line: 37, scope: !21, entity: !26)
!56 = !DIImportedEntity(tag: DW_TAG_imported_declaration, file: !5, line: 42, scope: !7, entity: !31)
!57 = !{i32 2, !"Dwarf Version", i32 2}
!58 = !{i32 2, !"Debug Info Version", i32 3}
!59 = !{!"clang version 3.6.0 "}
!60 = !DILocation(line: 3, column: 12, scope: !10)
!61 = !DILocalVariable(name: "", line: 4, arg: 1, scope: !14, file: !18, type: !13)
!62 = !DIExpression()
!63 = !DILocation(line: 4, column: 12, scope: !14)
!64 = !DILocation(line: 4, column: 16, scope: !14)
!65 = !DILocation(line: 20, column: 12, scope: !17)
!66 = !DILocalVariable(name: "b", line: 21, arg: 1, scope: !21, file: !18, type: !24)
!67 = !DILocation(line: 21, column: 15, scope: !21)
!68 = !DILocation(line: 22, column: 7, scope: !21)
!69 = !DILocation(line: 24, column: 5, scope: !38)
!70 = !DILocation(line: 38, column: 3, scope: !21)
!71 = !DILocation(line: 39, column: 1, scope: !21)
!72 = !DILocation(line: 44, column: 15, scope: !25)
!73 = !DILocation(line: 47, column: 21, scope: !26)
!74 = !DILocation(line: 0, scope: !75)
!75 = !DILexicalBlockFile(discriminator: 0, file: !5, scope: !27)
!131 = !DIGlobalVariableExpression(var: !31, expr: !DIExpression())
!132 = !DIGlobalVariableExpression(var: !32, expr: !DIExpression())