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llvm-6502/test/DebugInfo/X86/concrete_out_of_line.ll
David Blaikie e2cf6dc5c9 DebugInfo: Elide lexical scopes which only contain other (inline or lexical) scopes. 
DW_TAG_lexical_scopes inform debuggers about the instruction range for
which a given variable (or imported declaration/module/etc) is valid. If
the scope doesn't itself contain any such entities, it's a waste of
space and should be omitted.

We were correctly doing this for entirely empty leaves, but not for
intermediate nodes.

Reduces total (not just debug sections) .o file size for a bootstrap
-gmlt LLVM by 22% and bootstrap -gmlt clang executable by 13%. The wins
for a full -g build will be less as a % (and in absolute terms), but
should still be substantial - with some of that win being fewer
relocations, thus more substantiall reducing link times than fewer bytes
alone would have.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216861 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-31 21:26:22 +00:00

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; RUN: llc -mtriple=x86_64-linux < %s -filetype=obj | llvm-dwarfdump -debug-dump=info - | FileCheck %s
; test that we add DW_AT_inline even when we only have concrete out of line
; instances.
; first check that we have a TAG_subprogram at a given offset and it has
; AT_inline.
; CHECK: DW_TAG_class_type
; CHECK: DW_TAG_subprogram
; CHECK: [[ASSIGN_DECL:0x........]]: DW_TAG_subprogram
; CHECK: DW_TAG_class_type
; CHECK: [[RELEASE_DECL:0x........]]: DW_TAG_subprogram
; CHECK: [[DTOR_DECL:0x........]]: DW_TAG_subprogram
; CHECK: [[D2_ABS:.*]]: DW_TAG_subprogram
; CHECK-NEXT: DW_AT_{{.*}}linkage_name {{.*}}D2
; CHECK-NEXT: DW_AT_specification {{.*}} {[[DTOR_DECL]]}
; CHECK-NEXT: DW_AT_inline
; CHECK-NOT: DW_AT
; CHECK: DW_TAG
; CHECK: [[D1_ABS:.*]]: DW_TAG_subprogram
; CHECK-NEXT: DW_AT_{{.*}}linkage_name {{.*}}D1
; CHECK-NEXT: DW_AT_specification {{.*}} {[[DTOR_DECL]]}
; CHECK-NEXT: DW_AT_inline
; CHECK-NOT: DW_AT
; CHECK: [[D1_THIS_ABS:.*]]: DW_TAG_formal_parameter
; CHECK: [[RELEASE:0x........]]: DW_TAG_subprogram
; CHECK: DW_AT_specification {{.*}} {[[RELEASE_DECL]]}
; CHECK: DW_TAG_formal_parameter
; CHECK-NOT: NULL
; CHECK-NOT: DW_TAG
; CHECK: DW_TAG_inlined_subroutine
; CHECK-NEXT: DW_AT_abstract_origin {{.*}} {[[ASSIGN:0x........]]}
; CHECK-NOT: NULL
; CHECK-NOT: DW_TAG
; CHECK: DW_TAG_inlined_subroutine
; CHECK-NEXT: DW_AT_abstract_origin {{.*}} {[[D1_ABS]]}
; CHECK-NOT: NULL
; CHECK-NOT: DW_TAG
; CHECK: DW_TAG_inlined_subroutine
; CHECK-NEXT: DW_AT_abstract_origin {{.*}} {[[D2_ABS]]}
; and then that a TAG_subprogram refers to it with AT_abstract_origin.
; CHECK: DW_TAG_subprogram
; CHECK-NOT: DW_TAG
; CHECK: DW_AT_abstract_origin {{.*}} {[[D1_ABS]]}
; CHECK: DW_TAG_formal_parameter
; CHECK-NOT: DW_TAG
; CHECK: DW_AT_abstract_origin {{.*}} {[[D1_THIS_ABS]]}
; CHECK: DW_TAG_inlined_subroutine
; CHECK-NEXT: DW_AT_abstract_origin {{.*}} {[[D2_ABS]]}
define i32 @_ZN17nsAutoRefCnt7ReleaseEv() {
entry:
store i32 1, i32* null, align 4, !dbg !50
tail call void @_Z8moz_freePv(i8* null) nounwind, !dbg !54
ret i32 0
}
define void @_ZN17nsAutoRefCntD1Ev() {
entry:
tail call void @_Z8moz_freePv(i8* null) nounwind, !dbg !57
ret void
}
declare void @_Z8moz_freePv(i8*)
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!60}
!0 = metadata !{i32 786449, metadata !59, i32 4, metadata !"clang version 3.1 ()", i1 true, metadata !"", i32 0, metadata !1, metadata !1, metadata !3, metadata !47, metadata !1, metadata !""} ; [ DW_TAG_compile_unit ]
!1 = metadata !{}
!3 = metadata !{metadata !5, metadata !23, metadata !27, metadata !31}
!5 = metadata !{i32 720942, metadata !6, null, metadata !"Release", metadata !"Release", metadata !"_ZN17nsAutoRefCnt7ReleaseEv", i32 14, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, i32 ()* @_ZN17nsAutoRefCnt7ReleaseEv , null, metadata !12, metadata !20, i32 14} ; [ DW_TAG_subprogram ] [line 14] [def] [Release]
!6 = metadata !{i32 720937, metadata !59} ; [ DW_TAG_file_type ]
!7 = metadata !{i32 720917, i32 0, null, i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !8, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!8 = metadata !{metadata !9, metadata !10}
!9 = metadata !{i32 720932, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
!10 = metadata !{i32 786447, i32 0, null, i32 0, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !11} ; [ DW_TAG_pointer_type ]
!11 = metadata !{i32 786451, metadata !59, null, metadata !"nsAutoRefCnt", i32 10, i64 0, i64 0, i32 0, i32 4, null, null, i32 0, null, null, null} ; [ DW_TAG_structure_type ] [nsAutoRefCnt] [line 10, size 0, align 0, offset 0] [decl] [from ]
!12 = metadata !{i32 720942, metadata !6, metadata !13, metadata !"Release", metadata !"Release", metadata !"_ZN17nsAutoRefCnt7ReleaseEv", i32 11, metadata !7, i1 false, i1 false, i32 0, i32 0, null, i32 256, i1 true, null, null, i32 0, metadata !18, i32 11} ; [ DW_TAG_subprogram ]
!13 = metadata !{i32 720898, metadata !59, null, metadata !"nsAutoRefCnt", i32 10, i64 8, i64 8, i32 0, i32 0, null, metadata !14, null, null, null} ; [ DW_TAG_class_type ]
!14 = metadata !{metadata !12, metadata !15}
!15 = metadata !{i32 720942, metadata !6, metadata !13, metadata !"~nsAutoRefCnt", metadata !"~nsAutoRefCnt", metadata !"", i32 12, metadata !16, i1 false, i1 false, i32 0, i32 0, null, i32 256, i1 true, null, null, i32 0, metadata !18, i32 12} ; [ DW_TAG_subprogram ]
!16 = metadata !{i32 720917, i32 0, null, i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !17, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!17 = metadata !{null, metadata !10}
!18 = metadata !{}
!20 = metadata !{metadata !22}
!22 = metadata !{i32 786689, metadata !5, metadata !"this", metadata !6, i32 16777230, metadata !10, i32 64, i32 0} ; [ DW_TAG_arg_variable ]
!23 = metadata !{i32 720942, metadata !6, null, metadata !"~nsAutoRefCnt", metadata !"~nsAutoRefCnt", metadata !"_ZN17nsAutoRefCntD1Ev", i32 18, metadata !16, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, void ()* @_ZN17nsAutoRefCntD1Ev, null, metadata !15, metadata !24, i32 18} ; [ DW_TAG_subprogram ] [line 18] [def] [~nsAutoRefCnt]
!24 = metadata !{metadata !26}
!26 = metadata !{i32 786689, metadata !23, metadata !"this", metadata !6, i32 16777234, metadata !10, i32 64, i32 0} ; [ DW_TAG_arg_variable ]
!27 = metadata !{i32 720942, metadata !6, null, metadata !"~nsAutoRefCnt", metadata !"~nsAutoRefCnt", metadata !"_ZN17nsAutoRefCntD2Ev", i32 18, metadata !16, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, i32* null, null, metadata !15, metadata !28, i32 18} ; [ DW_TAG_subprogram ] [line 18] [def] [~nsAutoRefCnt]
!28 = metadata !{metadata !30}
!30 = metadata !{i32 786689, metadata !27, metadata !"this", metadata !6, i32 16777234, metadata !10, i32 64, i32 0} ; [ DW_TAG_arg_variable ]
!31 = metadata !{i32 720942, metadata !6, null, metadata !"operator=", metadata !"operator=", metadata !"_ZN12nsAutoRefCntaSEi", i32 4, metadata !32, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, null, null, metadata !36, metadata !43, i32 4} ; [ DW_TAG_subprogram ] [line 4] [def] [operator=]
!32 = metadata !{i32 720917, i32 0, null, i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !33, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!33 = metadata !{metadata !9, metadata !34, metadata !9}
!34 = metadata !{i32 786447, i32 0, null, i32 0, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !35} ; [ DW_TAG_pointer_type ]
!35 = metadata !{i32 786451, metadata !59, null, metadata !"nsAutoRefCnt", i32 2, i64 0, i64 0, i32 0, i32 4, null, null, i32 0, null, null, null} ; [ DW_TAG_structure_type ] [nsAutoRefCnt] [line 2, size 0, align 0, offset 0] [decl] [from ]
!36 = metadata !{i32 720942, metadata !6, metadata !37, metadata !"operator=", metadata !"operator=", metadata !"_ZN12nsAutoRefCntaSEi", i32 4, metadata !32, i1 false, i1 false, i32 0, i32 0, null, i32 256, i1 true, null, null, i32 0, metadata !18, i32 4} ; [ DW_TAG_subprogram ]
!37 = metadata !{i32 720898, metadata !59, null, metadata !"nsAutoRefCnt", i32 2, i64 32, i64 32, i32 0, i32 0, null, metadata !38, i32 0, null, null, null} ; [ DW_TAG_class_type ] [nsAutoRefCnt] [line 2, size 32, align 32, offset 0] [def] [from ]
!38 = metadata !{metadata !39, metadata !40, metadata !36}
!39 = metadata !{i32 786445, metadata !59, metadata !37, metadata !"mValue", i32 7, i64 32, i64 32, i64 0, i32 0, metadata !9} ; [ DW_TAG_member ]
!40 = metadata !{i32 720942, metadata !6, metadata !37, metadata !"nsAutoRefCnt", metadata !"nsAutoRefCnt", metadata !"", i32 3, metadata !41, i1 false, i1 false, i32 0, i32 0, null, i32 256, i1 true, null, null, i32 0, metadata !18, i32 3} ; [ DW_TAG_subprogram ]
!41 = metadata !{i32 720917, i32 0, null, i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !42, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!42 = metadata !{null, metadata !34}
!43 = metadata !{metadata !45, metadata !46}
!45 = metadata !{i32 786689, metadata !31, metadata !"this", metadata !6, i32 16777220, metadata !34, i32 64, i32 0} ; [ DW_TAG_arg_variable ]
!46 = metadata !{i32 786689, metadata !31, metadata !"aValue", metadata !6, i32 33554436, metadata !9, i32 0, i32 0} ; [ DW_TAG_arg_variable ]
!47 = metadata !{metadata !49}
!49 = metadata !{i32 720948, i32 0, null, metadata !"mRefCnt", metadata !"mRefCnt", metadata !"", metadata !6, i32 9, metadata !37, i32 0, i32 1, i32* null, null} ; [ DW_TAG_variable ]
!50 = metadata !{i32 5, i32 5, metadata !51, metadata !52}
!51 = metadata !{i32 786443, metadata !6, metadata !31, i32 4, i32 29, i32 2} ; [ DW_TAG_lexical_block ]
!52 = metadata !{i32 15, i32 0, metadata !53, null}
!53 = metadata !{i32 786443, metadata !6, metadata !5, i32 14, i32 34, i32 0} ; [ DW_TAG_lexical_block ]
!54 = metadata !{i32 19, i32 3, metadata !55, metadata !56}
!55 = metadata !{i32 786443, metadata !6, metadata !27, i32 18, i32 41, i32 1} ; [ DW_TAG_lexical_block ]
!56 = metadata !{i32 18, i32 41, metadata !23, metadata !52}
!57 = metadata !{i32 19, i32 3, metadata !55, metadata !58}
!58 = metadata !{i32 18, i32 41, metadata !23, null}
!59 = metadata !{metadata !"nsAutoRefCnt.ii", metadata !"/Users/espindola/mozilla-central/obj-x86_64-apple-darwin11.2.0/netwerk/base/src"}
!60 = metadata !{i32 1, metadata !"Debug Info Version", i32 1}
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