test/DebugInfo/X86/generate-odr-hash.ll - llvm-project/llvm - Git at Google


 ; RUN: llc < %s -o %t -filetype=obj -O0 -generate-type-units -mtriple=x86_64-unknown-linux-gnu
 ; RUN: llvm-dwarfdump -v %t | FileCheck --check-prefix=CHECK --check-prefix=SINGLE %s
 ; RUN: llvm-readobj -S --symbols %t | FileCheck --check-prefix=OBJ_SINGLE %s

 ; RUN: llc < %s -split-dwarf-file=foo.dwo -o %t -filetype=obj -O0 -generate-type-units -mtriple=x86_64-unknown-linux-gnu
 ; RUN: llvm-dwarfdump -v %t | FileCheck --check-prefix=CHECK --check-prefix=FISSION %s
 ; RUN: llvm-readobj -S --symbols %t | FileCheck --check-prefix=OBJ_FISSION %s

 ; Generated from bar.cpp:

 ; #line 1 "bar.h"
 ; struct bar {};
 ; #line 2 "bar.cpp"

 ; struct bar b;

 ; void foo(void) {
 ;   struct baz {};
 ;   baz b;
 ; }

 ; namespace echidna {
 ; namespace capybara {
 ; namespace mongoose {
 ; class fluffy {
 ;   int a;
 ;   int b;
 ; };

 ; fluffy animal;
 ; }
 ; }
 ; }

 ; namespace {
 ; struct walrus {
 ;   walrus() {}
 ; };
 ; }

 ; walrus w;

 ; struct wombat {
 ;   struct {
 ;     int a;
 ;     int b;
 ;   } a_b;
 ; };

 ; wombat wom;

 ; SINGLE-LABEL: .debug_info contents:
 ; FISSION-LABEL: .debug_info.dwo contents:
 ; CHECK: Compile Unit: length = [[CU_SIZE:[0-9a-f]+]]

 ; CHECK: [[BAR:^0x........]]: DW_TAG_structure_type
 ; CHECK-NEXT: DW_AT_declaration
 ; CHECK-NEXT: DW_AT_signature {{.*}} (0x1d02f3be30cc5688)
 ; CHECK: [[FLUFFY:^0x........]]: DW_TAG_class_type
 ; CHECK-NEXT: DW_AT_declaration
 ; CHECK-NEXT: DW_AT_signature {{.*}} (0xb04af47397402e77)

 ; Ensure the CU-local type 'walrus' is not placed in a type unit.
 ; CHECK: [[WALRUS:^0x........]]: DW_TAG_structure_type
 ; CHECK-NEXT: DW_AT_name{{.*}}"walrus"
 ; CHECK-NEXT: DW_AT_byte_size
 ; CHECK-NEXT: DW_AT_decl_file
 ; CHECK-NEXT: DW_AT_decl_line

 ; CHECK: [[WOMBAT:^0x........]]: DW_TAG_structure_type
 ; CHECK-NEXT: DW_AT_declaration
 ; CHECK-NEXT: DW_AT_signature {{.*}} (0xfd756cee88f8a118)

 ; SINGLE-LABEL: .debug_types contents:
 ; FISSION: .debug_types.dwo contents:

 ; Check that we generate a hash for bar and the value.
 ; CHECK-NOT: type_signature
 ; CHECK-LABEL: type_signature = 0x1d02f3be30cc5688
 ; CHECK: DW_TAG_structure_type
 ; FISSION-NEXT: DW_AT_name {{.*}} (indexed {{.*}} "bar"
 ; SINGLE-NEXT: DW_AT_name {{.*}} "bar"

 ; Check that we generate a hash for fluffy and the value.
 ; CHECK-NOT: type_signature
 ; CHECK-LABEL: type_signature = 0xb04af47397402e77
 ; CHECK-NOT: DW_AT_GNU_odr_signature [DW_FORM_data8]   (0x9a0124d5a0c21c52)
 ; CHECK: DW_TAG_namespace
 ; CHECK-NEXT: DW_AT_name{{.*}}"echidna"
 ; CHECK: DW_TAG_namespace
 ; CHECK-NEXT: DW_AT_name{{.*}}"capybara"
 ; CHECK: DW_TAG_namespace
 ; CHECK-NEXT: DW_AT_name{{.*}}"mongoose"
 ; CHECK: DW_TAG_class_type
 ; CHECK-NEXT: DW_AT_name{{.*}}"fluffy"

 ; Check that we generate a hash for wombat and the value, but not for the
 ; anonymous type contained within.
 ; CHECK-NOT: type_signature
 ; CHECK-LABEL: type_signature = 0xfd756cee88f8a118
 ; CHECK-NOT: DW_AT_GNU_odr_signature [DW_FORM_data8] (0x685bcc220141e9d7)
 ; CHECK: DW_TAG_structure_type
 ; CHECK-NEXT: DW_AT_name{{.*}}"wombat"

 ; CHECK-NOT: type_signature
 ; CHECK-LABEL: type_signature = 0xe94f6d3843e62d6b
 ; CHECK: DW_TAG_type_unit
 ; CHECK: DW_AT_stmt_list [DW_FORM_sec_offset] (0x00000000)
 ; CHECK-NOT: NULL
 ; CHECK-NOT: DW_AT_GNU_odr_signature
 ; CHECK: DW_TAG_structure_type
 ; The signature for the outer 'wombat' type
 ; CHECK: DW_AT_signature [DW_FORM_ref_sig8] (0xfd756cee88f8a118)
 ; CHECK: DW_TAG_structure_type
 ; CHECK-NOT: DW_AT_name
 ; CHECK-NOT: DW_AT_GNU_odr_signature
 ; CHECK: DW_TAG_member
 ; CHECK-NEXT: DW_AT_name{{.*}}"a"

 ; CHECK-LABEL: .debug_line contents:
 ; CHECK: Line table prologue
 ; CHECK-NOT: file_names[
 ; SINGLE: file_names[
 ; SINGLE-NEXT: name: "bar.h"
 ; CHECK: file_names[
 ; CHECK-NEXT: name: "bar.cpp"
 ; CHECK-NOT: file_names[

 ; FISSION: .debug_line.dwo contents:
 ; CHECK-NOT: .debug_line.dwo contents:
 ; FISSION: Line table prologue
 ; FISSION: opcode_base: 1
 ; FISSION-NOT: standard_opcode_lengths
 ; FISSION-NOT: include_directories
 ; FISSION-NOT: file_names[
 ; FISSION: file_names[
 ; FISSION-NEXT: name: "bar.h"
 ; FISSION: file_names[
 ; FISSION-NEXT: name: "bar.cpp"
 ; FISSION-NOT: file_names[

 ; CHECK-LABEL: .debug_str contents:

 ; Use the unit size as a rough hash/identifier for the unit we're dealing with
 ; it happens to be unambiguous at the moment, but it's hardly ideal.
 ; CHECK-LABEL: .debug_pubtypes contents:
 ; Don't emit pubtype entries for type DIEs in the compile unit that just indirect to a type unit.
 ; CHECK-NEXT: unit_size = [[CU_SIZE]]
 ; CHECK-NEXT: Offset Name
 ; CHECK-DAG: [[BAR]] "bar"
 ; CHECK-DAG: [[WALRUS]] "(anonymous namespace)::walrus"
 ; CHECK-DAG: [[WOMBAT]] "wombat"
 ; CHECK-DAG: [[FLUFFY]] "echidna::capybara::mongoose::fluffy"

 ; Make sure debug_types are in comdat groups. This could be more rigid to check
 ; that they're the right comdat groups (each type in a separate comdat group,
 ; etc)
 ; OBJ_SINGLE: Name: .debug_types (
 ; OBJ_SINGLE-NOT: }
 ; OBJ_SINGLE: SHF_GROUP

 ; Fission type units don't go in comdat groups, since their linker is debug
 ; aware it's handled using the debug info semantics rather than raw ELF object
 ; semantics.
 ; OBJ_FISSION: Name: .debug_types.dwo (
 ; OBJ_FISSION-NOT: SHF_GROUP
 ; OBJ_FISSION: }

 source_filename = "test/DebugInfo/X86/generate-odr-hash.ll"

 %struct.bar = type { i8 }
 %"class.echidna::capybara::mongoose::fluffy" = type { i32, i32 }
 %"struct.<anonymous namespace>::walrus" = type { i8 }
 %struct.wombat = type { %struct.anon }
 %struct.anon = type { i32, i32 }
 %struct.baz = type { i8 }

 @b = global %struct.bar zeroinitializer, align 1, !dbg !0
 @_ZN7echidna8capybara8mongoose6animalE = global %"class.echidna::capybara::mongoose::fluffy" zeroinitializer, align 4, !dbg !6
 @w = internal global %"struct.<anonymous namespace>::walrus" zeroinitializer, align 1, !dbg !16
 @wom = global %struct.wombat zeroinitializer, align 4, !dbg !25
 @llvm.global_ctors = appending global [1 x { i32, void ()*, i8* }] [{ i32, void ()*, i8* } { i32 65535, void ()* @_GLOBAL__I_a, i8* null }]

 ; Function Attrs: nounwind uwtable
 define void @_Z3foov() #0 !dbg !40 {
 entry:
   %b = alloca %struct.baz, align 1
   call void @llvm.dbg.declare(metadata %struct.baz* %b, metadata !43, metadata !45), !dbg !46
   ret void, !dbg !47
 }

 ; Function Attrs: nounwind readnone
 declare void @llvm.dbg.declare(metadata, metadata, metadata) #1

 define internal void @__cxx_global_var_init() section ".text.startup" !dbg !48 {
 entry:
   call void @_ZN12_GLOBAL__N_16walrusC2Ev(%"struct.<anonymous namespace>::walrus"* @w), !dbg !49
   ret void, !dbg !49
 }

 ; Function Attrs: nounwind uwtable
 define internal void @_ZN12_GLOBAL__N_16walrusC2Ev(%"struct.<anonymous namespace>::walrus"* %this) unnamed_addr #0 align 2 !dbg !50 {
 entry:
   %this.addr = alloca %"struct.<anonymous namespace>::walrus"*, align 8
   store %"struct.<anonymous namespace>::walrus"* %this, %"struct.<anonymous namespace>::walrus"** %this.addr, align 8
   call void @llvm.dbg.declare(metadata %"struct.<anonymous namespace>::walrus"** %this.addr, metadata !51, metadata !45), !dbg !53
   %this1 = load %"struct.<anonymous namespace>::walrus"*, %"struct.<anonymous namespace>::walrus"** %this.addr
   ret void, !dbg !54
 }

 define internal void @_GLOBAL__I_a() section ".text.startup" !dbg !55 {
 entry:
   call void @__cxx_global_var_init(), !dbg !57
   ret void, !dbg !57
 }

 attributes #0 = { nounwind uwtable "less-precise-fpmad"="false" "frame-pointer"="all" "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 = !{!34}
 !llvm.module.flags = !{!37, !38}
 !llvm.ident = !{!39}

 !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
 !1 = !DIGlobalVariable(name: "b", scope: null, file: !2, line: 3, type: !3, isLocal: false, isDefinition: true)
 !2 = !DIFile(filename: "bar.cpp", directory: "/tmp/dbginfo")
 !3 = !DICompositeType(tag: DW_TAG_structure_type, name: "bar", file: !4, line: 1, size: 8, align: 8, elements: !5, identifier: "_ZTS3bar")
 !4 = !DIFile(filename: "bar.h", directory: "/tmp/dbginfo")
 !5 = !{}
 !6 = !DIGlobalVariableExpression(var: !7, expr: !DIExpression())
 !7 = !DIGlobalVariable(name: "animal", linkageName: "_ZN7echidna8capybara8mongoose6animalE", scope: !8, file: !2, line: 18, type: !11, isLocal: false, isDefinition: true)
 !8 = !DINamespace(name: "mongoose", scope: !9)
 !9 = !DINamespace(name: "capybara", scope: !10)
 !10 = !DINamespace(name: "echidna", scope: null)
 !11 = !DICompositeType(tag: DW_TAG_class_type, name: "fluffy", scope: !8, file: !2, line: 13, size: 64, align: 32, elements: !12, identifier: "_ZTSN7echidna8capybara8mongoose6fluffyE")
 !12 = !{!13, !15}
 !13 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !11, file: !2, line: 14, baseType: !14, size: 32, align: 32, flags: DIFlagPrivate)
 !14 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
 !15 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !11, file: !2, line: 15, baseType: !14, size: 32, align: 32, offset: 32, flags: DIFlagPrivate)
 !16 = !DIGlobalVariableExpression(var: !17, expr: !DIExpression())
 !17 = !DIGlobalVariable(name: "w", scope: null, file: !2, line: 29, type: !18, isLocal: true, isDefinition: true)
 !18 = !DICompositeType(tag: DW_TAG_structure_type, name: "walrus", scope: !19, file: !2, line: 24, size: 8, align: 8, elements: !20)
 !19 = !DINamespace(scope: null)
 !20 = !{!21}
 !21 = !DISubprogram(name: "walrus", scope: !18, file: !2, line: 25, type: !22, isLocal: false, isDefinition: false, scopeLine: 25, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false)
 !22 = !DISubroutineType(types: !23)
 !23 = !{null, !24}
 !24 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !18, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer)
 !25 = !DIGlobalVariableExpression(var: !26, expr: !DIExpression())
 !26 = !DIGlobalVariable(name: "wom", scope: null, file: !2, line: 38, type: !27, isLocal: false, isDefinition: true)
 !27 = !DICompositeType(tag: DW_TAG_structure_type, name: "wombat", file: !2, line: 31, size: 64, align: 32, elements: !28, identifier: "_ZTS6wombat")
 !28 = !{!29}
 !29 = !DIDerivedType(tag: DW_TAG_member, name: "a_b", scope: !27, file: !2, line: 35, baseType: !30, size: 64, align: 32)
 !30 = !DICompositeType(tag: DW_TAG_structure_type, scope: !27, file: !2, line: 32, size: 64, align: 32, elements: !31, identifier: "_ZTSN6wombatUt_E")
 !31 = !{!32, !33}
 !32 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !30, file: !2, line: 33, baseType: !14, size: 32, align: 32)
 !33 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !30, file: !2, line: 34, baseType: !14, size: 32, align: 32, offset: 32)
 !34 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !2, producer: "clang version 3.5 ", isOptimized: false, runtimeVersion: 0, splitDebugFilename: "bar.dwo", emissionKind: FullDebug, enums: !5, retainedTypes: !35, globals: !36, imports: !5)
 !35 = !{!3, !11, !27, !30}
 !36 = !{!0, !6, !16, !25}
 !37 = !{i32 2, !"Dwarf Version", i32 4}
 !38 = !{i32 1, !"Debug Info Version", i32 3}
 !39 = !{!"clang version 3.5 "}
 !40 = distinct !DISubprogram(name: "foo", linkageName: "_Z3foov", scope: !2, file: !2, line: 5, type: !41, isLocal: false, isDefinition: true, scopeLine: 5, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !34, retainedNodes: !5)
 !41 = !DISubroutineType(types: !42)
 !42 = !{null}
 !43 = !DILocalVariable(name: "b", scope: !40, file: !2, line: 7, type: !44)
 !44 = !DICompositeType(tag: DW_TAG_structure_type, name: "baz", scope: !40, file: !2, line: 6, size: 8, align: 8, elements: !5)
 !45 = !DIExpression()
 !46 = !DILocation(line: 7, scope: !40)
 !47 = !DILocation(line: 8, scope: !40)
 !48 = distinct !DISubprogram(name: "__cxx_global_var_init", scope: !2, file: !2, line: 29, type: !41, isLocal: true, isDefinition: true, scopeLine: 29, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !34, retainedNodes: !5)
 !49 = !DILocation(line: 29, scope: !48)
 !50 = distinct !DISubprogram(name: "walrus", linkageName: "_ZN12_GLOBAL__N_16walrusC2Ev", scope: !18, file: !2, line: 25, type: !22, isLocal: true, isDefinition: true, scopeLine: 25, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !34, declaration: !21, retainedNodes: !5)
 !51 = !DILocalVariable(name: "this", arg: 1, scope: !50, type: !52, flags: DIFlagArtificial | DIFlagObjectPointer)
 !52 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !18, size: 64, align: 64)
 !53 = !DILocation(line: 0, scope: !50)
 !54 = !DILocation(line: 25, scope: !50)
 !55 = distinct !DISubprogram(linkageName: "_GLOBAL__I_a", scope: !2, file: !2, line: 25, type: !56, isLocal: true, isDefinition: true, scopeLine: 25, virtualIndex: 6, flags: DIFlagArtificial, isOptimized: false, unit: !34, retainedNodes: !5)
 !56 = !DISubroutineType(types: !5)
 !57 = !DILocation(line: 25, scope: !55)

	; RUN: llc < %s -o %t -filetype=obj -O0 -generate-type-units -mtriple=x86_64-unknown-linux-gnu
	; RUN: llvm-dwarfdump -v %t \| FileCheck --check-prefix=CHECK --check-prefix=SINGLE %s
	; RUN: llvm-readobj -S --symbols %t \| FileCheck --check-prefix=OBJ_SINGLE %s

	; RUN: llc < %s -split-dwarf-file=foo.dwo -o %t -filetype=obj -O0 -generate-type-units -mtriple=x86_64-unknown-linux-gnu
	; RUN: llvm-dwarfdump -v %t \| FileCheck --check-prefix=CHECK --check-prefix=FISSION %s
	; RUN: llvm-readobj -S --symbols %t \| FileCheck --check-prefix=OBJ_FISSION %s

	; Generated from bar.cpp:

	; #line 1 "bar.h"
	; struct bar {};
	; #line 2 "bar.cpp"

	; struct bar b;

	; void foo(void) {
	; struct baz {};
	; baz b;
	; }

	; namespace echidna {
	; namespace capybara {
	; namespace mongoose {
	; class fluffy {
	; int a;
	; int b;
	; };

	; fluffy animal;
	; }
	; }
	; }

	; namespace {
	; struct walrus {
	; walrus() {}
	; };
	; }

	; walrus w;

	; struct wombat {
	; struct {
	; int a;
	; int b;
	; } a_b;
	; };

	; wombat wom;

	; SINGLE-LABEL: .debug_info contents:
	; FISSION-LABEL: .debug_info.dwo contents:
	; CHECK: Compile Unit: length = [[CU_SIZE:[0-9a-f]+]]

	; CHECK: [[BAR:^0x........]]: DW_TAG_structure_type
	; CHECK-NEXT: DW_AT_declaration
	; CHECK-NEXT: DW_AT_signature {{.*}} (0x1d02f3be30cc5688)
	; CHECK: [[FLUFFY:^0x........]]: DW_TAG_class_type
	; CHECK-NEXT: DW_AT_declaration
	; CHECK-NEXT: DW_AT_signature {{.*}} (0xb04af47397402e77)

	; Ensure the CU-local type 'walrus' is not placed in a type unit.
	; CHECK: [[WALRUS:^0x........]]: DW_TAG_structure_type
	; CHECK-NEXT: DW_AT_name{{.*}}"walrus"
	; CHECK-NEXT: DW_AT_byte_size
	; CHECK-NEXT: DW_AT_decl_file
	; CHECK-NEXT: DW_AT_decl_line

	; CHECK: [[WOMBAT:^0x........]]: DW_TAG_structure_type
	; CHECK-NEXT: DW_AT_declaration
	; CHECK-NEXT: DW_AT_signature {{.*}} (0xfd756cee88f8a118)

	; SINGLE-LABEL: .debug_types contents:
	; FISSION: .debug_types.dwo contents:

	; Check that we generate a hash for bar and the value.
	; CHECK-NOT: type_signature
	; CHECK-LABEL: type_signature = 0x1d02f3be30cc5688
	; CHECK: DW_TAG_structure_type
	; FISSION-NEXT: DW_AT_name {{.}} (indexed {{.}} "bar"
	; SINGLE-NEXT: DW_AT_name {{.*}} "bar"

	; Check that we generate a hash for fluffy and the value.
	; CHECK-NOT: type_signature
	; CHECK-LABEL: type_signature = 0xb04af47397402e77
	; CHECK-NOT: DW_AT_GNU_odr_signature [DW_FORM_data8] (0x9a0124d5a0c21c52)
	; CHECK: DW_TAG_namespace
	; CHECK-NEXT: DW_AT_name{{.*}}"echidna"
	; CHECK: DW_TAG_namespace
	; CHECK-NEXT: DW_AT_name{{.*}}"capybara"
	; CHECK: DW_TAG_namespace
	; CHECK-NEXT: DW_AT_name{{.*}}"mongoose"
	; CHECK: DW_TAG_class_type
	; CHECK-NEXT: DW_AT_name{{.*}}"fluffy"

	; Check that we generate a hash for wombat and the value, but not for the
	; anonymous type contained within.
	; CHECK-NOT: type_signature
	; CHECK-LABEL: type_signature = 0xfd756cee88f8a118
	; CHECK-NOT: DW_AT_GNU_odr_signature [DW_FORM_data8] (0x685bcc220141e9d7)
	; CHECK: DW_TAG_structure_type
	; CHECK-NEXT: DW_AT_name{{.*}}"wombat"

	; CHECK-NOT: type_signature
	; CHECK-LABEL: type_signature = 0xe94f6d3843e62d6b
	; CHECK: DW_TAG_type_unit
	; CHECK: DW_AT_stmt_list [DW_FORM_sec_offset] (0x00000000)
	; CHECK-NOT: NULL
	; CHECK-NOT: DW_AT_GNU_odr_signature
	; CHECK: DW_TAG_structure_type
	; The signature for the outer 'wombat' type
	; CHECK: DW_AT_signature [DW_FORM_ref_sig8] (0xfd756cee88f8a118)
	; CHECK: DW_TAG_structure_type
	; CHECK-NOT: DW_AT_name
	; CHECK-NOT: DW_AT_GNU_odr_signature
	; CHECK: DW_TAG_member
	; CHECK-NEXT: DW_AT_name{{.*}}"a"

	; CHECK-LABEL: .debug_line contents:
	; CHECK: Line table prologue
	; CHECK-NOT: file_names[
	; SINGLE: file_names[
	; SINGLE-NEXT: name: "bar.h"
	; CHECK: file_names[
	; CHECK-NEXT: name: "bar.cpp"
	; CHECK-NOT: file_names[

	; FISSION: .debug_line.dwo contents:
	; CHECK-NOT: .debug_line.dwo contents:
	; FISSION: Line table prologue
	; FISSION: opcode_base: 1
	; FISSION-NOT: standard_opcode_lengths
	; FISSION-NOT: include_directories
	; FISSION-NOT: file_names[
	; FISSION: file_names[
	; FISSION-NEXT: name: "bar.h"
	; FISSION: file_names[
	; FISSION-NEXT: name: "bar.cpp"
	; FISSION-NOT: file_names[

	; CHECK-LABEL: .debug_str contents:

	; Use the unit size as a rough hash/identifier for the unit we're dealing with
	; it happens to be unambiguous at the moment, but it's hardly ideal.
	; CHECK-LABEL: .debug_pubtypes contents:
	; Don't emit pubtype entries for type DIEs in the compile unit that just indirect to a type unit.
	; CHECK-NEXT: unit_size = [[CU_SIZE]]
	; CHECK-NEXT: Offset Name
	; CHECK-DAG: [[BAR]] "bar"
	; CHECK-DAG: [[WALRUS]] "(anonymous namespace)::walrus"
	; CHECK-DAG: [[WOMBAT]] "wombat"
	; CHECK-DAG: [[FLUFFY]] "echidna::capybara::mongoose::fluffy"

	; Make sure debug_types are in comdat groups. This could be more rigid to check
	; that they're the right comdat groups (each type in a separate comdat group,
	; etc)
	; OBJ_SINGLE: Name: .debug_types (
	; OBJ_SINGLE-NOT: }
	; OBJ_SINGLE: SHF_GROUP

	; Fission type units don't go in comdat groups, since their linker is debug
	; aware it's handled using the debug info semantics rather than raw ELF object
	; semantics.
	; OBJ_FISSION: Name: .debug_types.dwo (
	; OBJ_FISSION-NOT: SHF_GROUP
	; OBJ_FISSION: }

	source_filename = "test/DebugInfo/X86/generate-odr-hash.ll"

	%struct.bar = type { i8 }
	%"class.echidna::capybara::mongoose::fluffy" = type { i32, i32 }
	%"struct.<anonymous namespace>::walrus" = type { i8 }
	%struct.wombat = type { %struct.anon }
	%struct.anon = type { i32, i32 }
	%struct.baz = type { i8 }

	@b = global %struct.bar zeroinitializer, align 1, !dbg !0
	@_ZN7echidna8capybara8mongoose6animalE = global %"class.echidna::capybara::mongoose::fluffy" zeroinitializer, align 4, !dbg !6
	@w = internal global %"struct.<anonymous namespace>::walrus" zeroinitializer, align 1, !dbg !16
	@wom = global %struct.wombat zeroinitializer, align 4, !dbg !25
	@llvm.global_ctors = appending global [1 x { i32, void (), i8 }] [{ i32, void (), i8 } { i32 65535, void ()* @_GLOBAL__I_a, i8* null }]

	; Function Attrs: nounwind uwtable
	define void @_Z3foov() #0 !dbg !40 {
	entry:
	%b = alloca %struct.baz, align 1
	call void @llvm.dbg.declare(metadata %struct.baz* %b, metadata !43, metadata !45), !dbg !46
	ret void, !dbg !47
	}

	; Function Attrs: nounwind readnone
	declare void @llvm.dbg.declare(metadata, metadata, metadata) #1

	define internal void @__cxx_global_var_init() section ".text.startup" !dbg !48 {
	entry:
	call void @_ZN12_GLOBAL__N_16walrusC2Ev(%"struct.<anonymous namespace>::walrus"* @w), !dbg !49
	ret void, !dbg !49
	}

	; Function Attrs: nounwind uwtable
	define internal void @_ZN12_GLOBAL__N_16walrusC2Ev(%"struct.<anonymous namespace>::walrus"* %this) unnamed_addr #0 align 2 !dbg !50 {
	entry:
	%this.addr = alloca %"struct.<anonymous namespace>::walrus"*, align 8
	store %"struct.<anonymous namespace>::walrus"* %this, %"struct.<anonymous namespace>::walrus"** %this.addr, align 8
	call void @llvm.dbg.declare(metadata %"struct.<anonymous namespace>::walrus"** %this.addr, metadata !51, metadata !45), !dbg !53
	%this1 = load %"struct.<anonymous namespace>::walrus", %"struct.<anonymous namespace>::walrus"* %this.addr
	ret void, !dbg !54
	}

	define internal void @_GLOBAL__I_a() section ".text.startup" !dbg !55 {
	entry:
	call void @__cxx_global_var_init(), !dbg !57
	ret void, !dbg !57
	}

	attributes #0 = { nounwind uwtable "less-precise-fpmad"="false" "frame-pointer"="all" "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 = !{!34}
	!llvm.module.flags = !{!37, !38}
	!llvm.ident = !{!39}

	!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
	!1 = !DIGlobalVariable(name: "b", scope: null, file: !2, line: 3, type: !3, isLocal: false, isDefinition: true)
	!2 = !DIFile(filename: "bar.cpp", directory: "/tmp/dbginfo")
	!3 = !DICompositeType(tag: DW_TAG_structure_type, name: "bar", file: !4, line: 1, size: 8, align: 8, elements: !5, identifier: "_ZTS3bar")
	!4 = !DIFile(filename: "bar.h", directory: "/tmp/dbginfo")
	!5 = !{}
	!6 = !DIGlobalVariableExpression(var: !7, expr: !DIExpression())
	!7 = !DIGlobalVariable(name: "animal", linkageName: "_ZN7echidna8capybara8mongoose6animalE", scope: !8, file: !2, line: 18, type: !11, isLocal: false, isDefinition: true)
	!8 = !DINamespace(name: "mongoose", scope: !9)
	!9 = !DINamespace(name: "capybara", scope: !10)
	!10 = !DINamespace(name: "echidna", scope: null)
	!11 = !DICompositeType(tag: DW_TAG_class_type, name: "fluffy", scope: !8, file: !2, line: 13, size: 64, align: 32, elements: !12, identifier: "_ZTSN7echidna8capybara8mongoose6fluffyE")
	!12 = !{!13, !15}
	!13 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !11, file: !2, line: 14, baseType: !14, size: 32, align: 32, flags: DIFlagPrivate)
	!14 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
	!15 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !11, file: !2, line: 15, baseType: !14, size: 32, align: 32, offset: 32, flags: DIFlagPrivate)
	!16 = !DIGlobalVariableExpression(var: !17, expr: !DIExpression())
	!17 = !DIGlobalVariable(name: "w", scope: null, file: !2, line: 29, type: !18, isLocal: true, isDefinition: true)
	!18 = !DICompositeType(tag: DW_TAG_structure_type, name: "walrus", scope: !19, file: !2, line: 24, size: 8, align: 8, elements: !20)
	!19 = !DINamespace(scope: null)
	!20 = !{!21}
	!21 = !DISubprogram(name: "walrus", scope: !18, file: !2, line: 25, type: !22, isLocal: false, isDefinition: false, scopeLine: 25, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false)
	!22 = !DISubroutineType(types: !23)
	!23 = !{null, !24}
	!24 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !18, size: 64, align: 64, flags: DIFlagArtificial \| DIFlagObjectPointer)
	!25 = !DIGlobalVariableExpression(var: !26, expr: !DIExpression())
	!26 = !DIGlobalVariable(name: "wom", scope: null, file: !2, line: 38, type: !27, isLocal: false, isDefinition: true)
	!27 = !DICompositeType(tag: DW_TAG_structure_type, name: "wombat", file: !2, line: 31, size: 64, align: 32, elements: !28, identifier: "_ZTS6wombat")
	!28 = !{!29}
	!29 = !DIDerivedType(tag: DW_TAG_member, name: "a_b", scope: !27, file: !2, line: 35, baseType: !30, size: 64, align: 32)
	!30 = !DICompositeType(tag: DW_TAG_structure_type, scope: !27, file: !2, line: 32, size: 64, align: 32, elements: !31, identifier: "_ZTSN6wombatUt_E")
	!31 = !{!32, !33}
	!32 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !30, file: !2, line: 33, baseType: !14, size: 32, align: 32)
	!33 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !30, file: !2, line: 34, baseType: !14, size: 32, align: 32, offset: 32)
	!34 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !2, producer: "clang version 3.5 ", isOptimized: false, runtimeVersion: 0, splitDebugFilename: "bar.dwo", emissionKind: FullDebug, enums: !5, retainedTypes: !35, globals: !36, imports: !5)
	!35 = !{!3, !11, !27, !30}
	!36 = !{!0, !6, !16, !25}
	!37 = !{i32 2, !"Dwarf Version", i32 4}
	!38 = !{i32 1, !"Debug Info Version", i32 3}
	!39 = !{!"clang version 3.5 "}
	!40 = distinct !DISubprogram(name: "foo", linkageName: "_Z3foov", scope: !2, file: !2, line: 5, type: !41, isLocal: false, isDefinition: true, scopeLine: 5, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !34, retainedNodes: !5)
	!41 = !DISubroutineType(types: !42)
	!42 = !{null}
	!43 = !DILocalVariable(name: "b", scope: !40, file: !2, line: 7, type: !44)
	!44 = !DICompositeType(tag: DW_TAG_structure_type, name: "baz", scope: !40, file: !2, line: 6, size: 8, align: 8, elements: !5)
	!45 = !DIExpression()
	!46 = !DILocation(line: 7, scope: !40)
	!47 = !DILocation(line: 8, scope: !40)
	!48 = distinct !DISubprogram(name: "__cxx_global_var_init", scope: !2, file: !2, line: 29, type: !41, isLocal: true, isDefinition: true, scopeLine: 29, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !34, retainedNodes: !5)
	!49 = !DILocation(line: 29, scope: !48)
	!50 = distinct !DISubprogram(name: "walrus", linkageName: "_ZN12_GLOBAL__N_16walrusC2Ev", scope: !18, file: !2, line: 25, type: !22, isLocal: true, isDefinition: true, scopeLine: 25, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !34, declaration: !21, retainedNodes: !5)
	!51 = !DILocalVariable(name: "this", arg: 1, scope: !50, type: !52, flags: DIFlagArtificial \| DIFlagObjectPointer)
	!52 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !18, size: 64, align: 64)
	!53 = !DILocation(line: 0, scope: !50)
	!54 = !DILocation(line: 25, scope: !50)
	!55 = distinct !DISubprogram(linkageName: "_GLOBAL__I_a", scope: !2, file: !2, line: 25, type: !56, isLocal: true, isDefinition: true, scopeLine: 25, virtualIndex: 6, flags: DIFlagArtificial, isOptimized: false, unit: !34, retainedNodes: !5)
	!56 = !DISubroutineType(types: !5)
	!57 = !DILocation(line: 25, scope: !55)