llvm/test/DebugInfo/X86/subprogram-inline.ll

; RUN: llc -mtriple=x86_64-unknown-linux-gnu -filetype=obj -O0 < %s  | llvm-dwarfdump -debug-dump=info - | FileCheck %s
; RUN: llc -mtriple=x86_64-unknown-linux-gnu -split-dwarf=Enable -filetype=obj -O0 < %s  | llvm-dwarfdump -debug-dump=info.dwo - | FileCheck %s

;; This test checks the following:
;; 2. Function static variable, typedef, records (structure, class and union)
;;    that are defined in lexical function scope are emitted as children to
;;    the function scope, directly.
;; 3. "bar" function, which was inlined into "foo" function, is created as
;;    abstract (with DW_AT_inline attribute).
;;    All variables and types are defined in this abstract entry.
;; 4. "bar" function is created in "foo" function as inlined function
;;    (with DW_TAG_inlined_subroutine attribute), and all its local variables
;;    are created as concrete variables pointing to the abstract suitable entry
;;    defined under abstract "bar" function.
;;
;; This test was generated by running following command:
;; clang -cc1 -O0 -g -emit-llvm foo.cpp -o - | opt -S -inline -sroa
;; Where foo.cpp
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;__inline int bar(int s) {
;;
;;
;;      struct X {
;;          int x;
;;      };
;;      typedef int Y;
;;
;;        X a = { s };
;;        Y b(s);
;;        static int c = 0;
;;        return a.x + b + c++;
;;
;;
;;
;;}
;;
;;
;;int foo(int i) {
;;  return
;;    bar(i);
;;}
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

; CHECK:    [[Offset_bar:0x[0-9abcdef]+]]: DW_TAG_subprogram
; CHECK-NOT: {{DW_TAG|NULL}}
; CHECK:      DW_AT_name {{.*}} "bar"
; CHECK:      DW_AT_inline
; CHECK-NOT: NULL

; CHECK:        [[Offset_a:0x[0-9abcdef]+]]: DW_TAG_variable
; CHECK-NOT: {{DW_TAG|NULL}}
; CHECK:          DW_AT_name {{.*}} "a"

; CHECK-NOT: {{DW_TAG|NULL}}
; CHECK:        [[Offset_b:0x[0-9abcdef]+]]: DW_TAG_variable
; CHECK-NOT: {{DW_TAG|NULL}}
; CHECK:          DW_AT_name {{.*}} "b"

; CHECK-NOT: {{DW_TAG|NULL}}
; CHECK:        [[Offset_c:0x[0-9abcdef]+]]: DW_TAG_variable
; CHECK-NOT: {{DW_TAG|NULL}}
; CHECK:          DW_AT_name {{.*}} "c"
; CHECK-NOT: {{DW_TAG|NULL}}
; CHECK:          DW_AT_location

; CHECK-NOT: {{DW_TAG|NULL}}
; CHECK:      [[Offset_X:0x[0-9abcdef]+]]: DW_TAG_structure_type
; CHECK-NOT: {{DW_TAG|NULL}}
; CHECK:        DW_AT_name {{.*}} "X"
; CHECK:        NULL

; CHECK-NOT: {{DW_TAG|NULL}}
; CHECK:      [[Offset_Y:0x[0-9abcdef]+]]: DW_TAG_typedef
; CHECK-NOT: {{DW_TAG|NULL}}
; CHECK:        DW_AT_name {{.*}} "Y"

; CHECK-NOT: {{DW_TAG}}
; CHECK:      NULL


; CHECK:    DW_TAG_subprogram
; CHECK-NOT: {{DW_TAG|NULL}}
; CHECK:      DW_AT_name {{.*}} "foo"
; CHECK-NOT: {{NULL}}
; CHECK:      DW_TAG_inlined_subroutine
; CHECK-NEXT:   DW_AT_abstract_origin {{.*}} {[[Offset_bar]]}

; CHECK-NOT: {{NULL}}
; CHECK:          DW_TAG_variable
; CHECK-NEXT:       DW_AT_location
; CHECK-NEXT:       DW_AT_abstract_origin {{.*}} {[[Offset_a]]}

; CHECK-NOT: {{DW_TAG|NULL}}
; CHECK:          DW_TAG_variable
; CHECK-NEXT:       DW_AT_location
; CHECK-NEXT:       DW_AT_abstract_origin {{.*}} {[[Offset_b]]}

; CHECK-NOT: {{DW_TAG}}
; CHECK:      NULL

%struct.X = type { i32 }

$_ZZ3bariE1c = comdat any

@_ZZ3bariE1c = linkonce_odr global i32 0, comdat, align 4

; Function Attrs: nounwind
define i32 @_Z3fooi(i32 %i) #0 !dbg !13 {
entry:
  call void @llvm.dbg.value(metadata i32 %i, i64 0, metadata !18, metadata !19), !dbg !20
  call void @llvm.dbg.value(metadata i32 %i, i64 0, metadata !21, metadata !19), !dbg !22
  call void @llvm.dbg.declare(metadata %struct.X* undef, metadata !24, metadata !19), !dbg !25
  call void @llvm.dbg.value(metadata i32 %i, i64 0, metadata !24, metadata !19), !dbg !25
  call void @llvm.dbg.value(metadata i32 %i, i64 0, metadata !26, metadata !19), !dbg !27
  %add.i = add nsw i32 %i, %i, !dbg !28
  %0 = load i32, i32* @_ZZ3bariE1c, align 4, !dbg !28
  %inc.i = add nsw i32 %0, 1, !dbg !28
  store i32 %inc.i, i32* @_ZZ3bariE1c, align 4, !dbg !28
  %add2.i = add nsw i32 %add.i, %0, !dbg !28
  ret i32 %add2.i, !dbg !29
}

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

; Function Attrs: nounwind readnone
declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #1

attributes #0 = { nounwind "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-features"="+mmx,+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { nounwind readnone }

!llvm.dbg.cu = !{!0, !30}
!llvm.module.flags = !{!16}
!llvm.ident = !{!17}

!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 3.8.0 (trunk 256818)", isOptimized: false, runtimeVersion: 0, emissionKind: 1, enums: !2, retainedTypes: !3, subprograms: !12, globals: !14)
!1 = !DIFile(filename: "foo.cpp", directory: "/")
!2 = !{}
!3 = !{!4, !11}
!4 = !DICompositeType(tag: DW_TAG_structure_type, name: "X", scope: !5, file: !1, line: 4, size: 32, align: 32, elements: !9, identifier: "_ZTSZ3bariE1X")
!5 = distinct !DISubprogram(name: "bar", linkageName: "_Z3bari", scope: !1, file: !1, line: 1, type: !6, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: false, variables: !2)
!6 = !DISubroutineType(types: !7)
!7 = !{!8, !8}
!8 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!9 = !{!10}
!10 = !DIDerivedType(tag: DW_TAG_member, name: "x", scope: !"_ZTSZ3bariE1X", file: !1, line: 5, baseType: !8, size: 32, align: 32)
!11 = !DIDerivedType(tag: DW_TAG_typedef, name: "Y", scope: !5, file: !1, line: 7, baseType: !8)
!12 = !{!13, !5}
!13 = distinct !DISubprogram(name: "foo", linkageName: "_Z3fooi", scope: !1, file: !1, line: 19, type: !6, isLocal: false, isDefinition: true, scopeLine: 19, flags: DIFlagPrototyped, isOptimized: false, variables: !2)
!14 = !{!15}
!15 = !DIGlobalVariable(name: "c", scope: !5, file: !1, line: 11, type: !8, isLocal: false, isDefinition: true, variable: i32* @_ZZ3bariE1c)
!16 = !{i32 2, !"Debug Info Version", i32 3}
!17 = !{!"clang version 3.8.0 (trunk 256818)"}
!18 = !DILocalVariable(name: "i", arg: 1, scope: !13, file: !1, line: 19, type: !8)
!19 = !DIExpression()
!20 = !DILocation(line: 19, scope: !13)
!21 = !DILocalVariable(name: "s", arg: 1, scope: !5, file: !1, line: 1, type: !8)
!22 = !DILocation(line: 1, scope: !5, inlinedAt: !23)
!23 = distinct !DILocation(line: 21, scope: !13)
!24 = !DILocalVariable(name: "a", scope: !5, file: !1, line: 9, type: !"_ZTSZ3bariE1X")
!25 = !DILocation(line: 9, scope: !5, inlinedAt: !23)
!26 = !DILocalVariable(name: "b", scope: !5, file: !1, line: 10, type: !11)
!27 = !DILocation(line: 10, scope: !5, inlinedAt: !23)
!28 = !DILocation(line: 12, scope: !5, inlinedAt: !23)
!29 = !DILocation(line: 20, scope: !13)

; This line is manually added to check that the test does not crash when having
; more than one compile unit!
!30 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 3.8.0 (trunk 242994) (llvm/trunk 242995)", isOptimized: false, runtimeVersion: 0, emissionKind: 1, enums: !2, retainedTypes: !2, subprograms: !2, globals: !2)