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llvm/test/DebugInfo/X86/generate-odr-hash.ll
Duncan P. N. Exon Smith 83902832de Revert "Revert "DI: Fold constant arguments into a single MDString"" 
This reverts commit r218918, effectively reapplying r218914 after fixing
an Ocaml bindings test and an Asan crash.  The root cause of the latter
was a tightened-up check in `DILexicalBlock::Verify()`, so I'll file a
PR to investigate who requires the loose check (and why).

Original commit message follows.

--

This patch addresses the first stage of PR17891 by folding constant
arguments together into a single MDString.  Integers are stringified and
a `\0` character is used as a separator.

Part of PR17891.

Note: I've attached my testcases upgrade scripts to the PR.  If I've
just broken your out-of-tree testcases, they might help.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219010 91177308-0d34-0410-b5e6-96231b3b80d8
2014-10-03 20:01:09 +00:00

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; REQUIRES: object-emission
; RUN: llc < %s -o %t -filetype=obj -O0 -generate-type-units -mtriple=x86_64-unknown-linux-gnu
; RUN: llvm-dwarfdump %t | FileCheck --check-prefix=CHECK --check-prefix=SINGLE %s
; RUN: llvm-readobj -s -t %t | FileCheck --check-prefix=OBJ_SINGLE %s
; RUN: llc < %s -split-dwarf=Enable -o %t -filetype=obj -O0 -generate-type-units -mtriple=x86_64-unknown-linux-gnu
; RUN: llvm-dwarfdump %t | FileCheck --check-prefix=CHECK --check-prefix=FISSION %s
; RUN: llvm-readobj -s -t %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-NOT: .debug_types contents:
; FISSION-LABEL: .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
; CHECK-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{{.*}} bar.h
; CHECK: file_names{{.*}} bar.cpp
; CHECK-NOT: file_names[
; CHECK-LABEL: .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{{.*}} bar.h
; FISSION: file_names{{.*}} 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: }
%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
@_ZN7echidna8capybara8mongoose6animalE = global %"class.echidna::capybara::mongoose::fluffy" zeroinitializer, align 4
@w = internal global %"struct.<anonymous namespace>::walrus" zeroinitializer, align 1
@wom = global %struct.wombat zeroinitializer, align 4
@llvm.global_ctors = appending global [1 x { i32, void ()* }] [{ i32, void ()* } { i32 65535, void ()* @_GLOBAL__I_a }]
; Function Attrs: nounwind uwtable
define void @_Z3foov() #0 {
entry:
%b = alloca %struct.baz, align 1
call void @llvm.dbg.declare(metadata !{%struct.baz* %b}, metadata !46, metadata !{metadata !"0x102"}), !dbg !48
ret void, !dbg !49
}
; Function Attrs: nounwind readnone
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
define internal void @__cxx_global_var_init() section ".text.startup" {
entry:
call void @_ZN12_GLOBAL__N_16walrusC2Ev(%"struct.<anonymous namespace>::walrus"* @w), !dbg !50
ret void, !dbg !50
}
; Function Attrs: nounwind uwtable
define internal void @_ZN12_GLOBAL__N_16walrusC2Ev(%"struct.<anonymous namespace>::walrus"* %this) unnamed_addr #0 align 2 {
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 !{metadata !"0x102"}), !dbg !53
%this1 = load %"struct.<anonymous namespace>::walrus"** %this.addr
ret void, !dbg !54
}
define internal void @_GLOBAL__I_a() section ".text.startup" {
entry:
call void @__cxx_global_var_init(), !dbg !55
ret void, !dbg !55
}
attributes #0 = { 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 = { nounwind readnone }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!43, !44}
!llvm.ident = !{!45}
!0 = metadata !{metadata !"0x11\004\00clang version 3.5 \000\00\000\00bar.dwo\000", metadata !1, metadata !2, metadata !3, metadata !21, metadata !38, metadata !2} ; [ DW_TAG_compile_unit ] [/tmp/dbginfo/bar.cpp] [DW_LANG_C_plus_plus]
!1 = metadata !{metadata !"bar.cpp", metadata !"/tmp/dbginfo"}
!2 = metadata !{}
!3 = metadata !{metadata !4, metadata !6, metadata !14, metadata !17}
!4 = metadata !{metadata !"0x13\00bar\001\008\008\000\000\000", metadata !5, null, null, metadata !2, null, null, metadata !"_ZTS3bar"} ; [ DW_TAG_structure_type ] [bar] [line 1, size 8, align 8, offset 0] [def] [from ]
!5 = metadata !{metadata !"bar.h", metadata !"/tmp/dbginfo"}
!6 = metadata !{metadata !"0x2\00fluffy\0013\0064\0032\000\000\000", metadata !1, metadata !7, null, metadata !10, null, null, metadata !"_ZTSN7echidna8capybara8mongoose6fluffyE"} ; [ DW_TAG_class_type ] [fluffy] [line 13, size 64, align 32, offset 0] [def] [from ]
!7 = metadata !{metadata !"0x39\00mongoose\0012", metadata !1, metadata !8} ; [ DW_TAG_namespace ] [mongoose] [line 12]
!8 = metadata !{metadata !"0x39\00capybara\0011", metadata !1, metadata !9} ; [ DW_TAG_namespace ] [capybara] [line 11]
!9 = metadata !{metadata !"0x39\00echidna\0010", metadata !1, null} ; [ DW_TAG_namespace ] [echidna] [line 10]
!10 = metadata !{metadata !11, metadata !13}
!11 = metadata !{metadata !"0xd\00a\0014\0032\0032\000\001", metadata !1, metadata !"_ZTSN7echidna8capybara8mongoose6fluffyE", metadata !12} ; [ DW_TAG_member ] [a] [line 14, size 32, align 32, offset 0] [private] [from int]
!12 = metadata !{metadata !"0x24\00int\000\0032\0032\000\000\005", null, null} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
!13 = metadata !{metadata !"0xd\00b\0015\0032\0032\0032\001", metadata !1, metadata !"_ZTSN7echidna8capybara8mongoose6fluffyE", metadata !12} ; [ DW_TAG_member ] [b] [line 15, size 32, align 32, offset 32] [private] [from int]
!14 = metadata !{metadata !"0x13\00wombat\0031\0064\0032\000\000\000", metadata !1, null, null, metadata !15, null, null, metadata !"_ZTS6wombat"} ; [ DW_TAG_structure_type ] [wombat] [line 31, size 64, align 32, offset 0] [def] [from ]
!15 = metadata !{metadata !16}
!16 = metadata !{metadata !"0xd\00a_b\0035\0064\0032\000\000", metadata !1, metadata !"_ZTS6wombat", metadata !"_ZTSN6wombatUt_E"} ; [ DW_TAG_member ] [a_b] [line 35, size 64, align 32, offset 0] [from _ZTSN6wombatUt_E]
!17 = metadata !{metadata !"0x13\00\0032\0064\0032\000\000\000", metadata !1, metadata !"_ZTS6wombat", null, metadata !18, null, null, metadata !"_ZTSN6wombatUt_E"} ; [ DW_TAG_structure_type ] [line 32, size 64, align 32, offset 0] [def] [from ]
!18 = metadata !{metadata !19, metadata !20}
!19 = metadata !{metadata !"0xd\00a\0033\0032\0032\000\000", metadata !1, metadata !"_ZTSN6wombatUt_E", metadata !12} ; [ DW_TAG_member ] [a] [line 33, size 32, align 32, offset 0] [from int]
!20 = metadata !{metadata !"0xd\00b\0034\0032\0032\0032\000", metadata !1, metadata !"_ZTSN6wombatUt_E", metadata !12} ; [ DW_TAG_member ] [b] [line 34, size 32, align 32, offset 32] [from int]
!21 = metadata !{metadata !22, metadata !26, metadata !27, metadata !36}
!22 = metadata !{metadata !"0x2e\00foo\00foo\00_Z3foov\005\000\001\000\006\00256\000\005", metadata !1, metadata !23, metadata !24, null, void ()* @_Z3foov, null, null, metadata !2} ; [ DW_TAG_subprogram ] [line 5] [def] [foo]
!23 = metadata !{metadata !"0x29", metadata !1} ; [ DW_TAG_file_type ] [/tmp/dbginfo/bar.cpp]
!24 = metadata !{metadata !"0x15\00\000\000\000\000\000\000", i32 0, null, null, metadata !25, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!25 = metadata !{null}
!26 = metadata !{metadata !"0x2e\00__cxx_global_var_init\00__cxx_global_var_init\00\0029\001\001\000\006\00256\000\0029", metadata !1, metadata !23, metadata !24, null, void ()* @__cxx_global_var_init, null, null, metadata !2} ; [ DW_TAG_subprogram ] [line 29] [local] [def] [__cxx_global_var_init]
!27 = metadata !{metadata !"0x2e\00walrus\00walrus\00_ZN12_GLOBAL__N_16walrusC2Ev\0025\001\001\000\006\00256\000\0025", metadata !1, metadata !28, metadata !32, null, void (%"struct.<anonymous namespace>::walrus"*)* @_ZN12_GLOBAL__N_16walrusC2Ev, null, metadata !31, metadata !2} ; [ DW_TAG_subprogram ] [line 25] [local] [def] [walrus]
!28 = metadata !{metadata !"0x13\00walrus\0024\008\008\000\000\000", metadata !1, metadata !29, null, metadata !30, null, null, null} ; [ DW_TAG_structure_type ] [walrus] [line 24, size 8, align 8, offset 0] [def] [from ]
!29 = metadata !{metadata !"0x39\00\0023", metadata !1, null} ; [ DW_TAG_namespace ] [line 23]
!30 = metadata !{metadata !31}
!31 = metadata !{metadata !"0x2e\00walrus\00walrus\00\0025\000\000\000\006\00256\000\0025", metadata !1, metadata !28, metadata !32, null, null, null, i32 0, metadata !35} ; [ DW_TAG_subprogram ] [line 25] [walrus]
!32 = metadata !{metadata !"0x15\00\000\000\000\000\000\000", i32 0, null, null, metadata !33, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!33 = metadata !{null, metadata !34}
!34 = metadata !{metadata !"0xf\00\000\0064\0064\000\001088", null, null, metadata !28} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [artificial] [from walrus]
!35 = metadata !{i32 786468}
!36 = metadata !{metadata !"0x2e\00\00\00_GLOBAL__I_a\0025\001\001\000\006\0064\000\0025", metadata !1, metadata !23, metadata !37, null, void ()* @_GLOBAL__I_a, null, null, metadata !2} ; [ DW_TAG_subprogram ] [line 25] [local] [def]
!37 = metadata !{metadata !"0x15\00\000\000\000\000\000\000", i32 0, null, null, metadata !2, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!38 = metadata !{metadata !39, metadata !40, metadata !41, metadata !42}
!39 = metadata !{metadata !"0x34\00b\00b\00\003\000\001", null, metadata !23, metadata !4, %struct.bar* @b, null} ; [ DW_TAG_variable ] [b] [line 3] [def]
!40 = metadata !{metadata !"0x34\00animal\00animal\00_ZN7echidna8capybara8mongoose6animalE\0018\000\001", metadata !7, metadata !23, metadata !6, %"class.echidna::capybara::mongoose::fluffy"* @_ZN7echidna8capybara8mongoose6animalE, null} ; [ DW_TAG_variable ] [animal] [line 18] [def]
!41 = metadata !{metadata !"0x34\00w\00w\00\0029\001\001", null, metadata !23, metadata !28, %"struct.<anonymous namespace>::walrus"* @w, null} ; [ DW_TAG_variable ] [w] [line 29] [local] [def]
!42 = metadata !{metadata !"0x34\00wom\00wom\00\0038\000\001", null, metadata !23, metadata !14, %struct.wombat* @wom, null} ; [ DW_TAG_variable ] [wom] [line 38] [def]
!43 = metadata !{i32 2, metadata !"Dwarf Version", i32 4}
!44 = metadata !{i32 1, metadata !"Debug Info Version", i32 2}
!45 = metadata !{metadata !"clang version 3.5 "}
!46 = metadata !{metadata !"0x100\00b\007\000", metadata !22, metadata !23, metadata !47} ; [ DW_TAG_auto_variable ] [b] [line 7]
!47 = metadata !{metadata !"0x13\00baz\006\008\008\000\000\000", metadata !1, metadata !22, null, metadata !2, null, null, null} ; [ DW_TAG_structure_type ] [baz] [line 6, size 8, align 8, offset 0] [def] [from ]
!48 = metadata !{i32 7, i32 0, metadata !22, null}
!49 = metadata !{i32 8, i32 0, metadata !22, null}
!50 = metadata !{i32 29, i32 0, metadata !26, null}
!51 = metadata !{metadata !"0x101\00this\0016777216\001088", metadata !27, null, metadata !52} ; [ DW_TAG_arg_variable ] [this] [line 0]
!52 = metadata !{metadata !"0xf\00\000\0064\0064\000\000", null, null, metadata !28} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from walrus]
!53 = metadata !{i32 0, i32 0, metadata !27, null}
!54 = metadata !{i32 25, i32 0, metadata !27, null}
!55 = metadata !{i32 25, i32 0, metadata !36, null}
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