llvm/test/DebugInfo/cross-cu-inlining.ll

; REQUIRES: object-emission

; RUN: %llc_dwarf -O0 -filetype=obj < %s | llvm-dwarfdump -debug-dump=info - | FileCheck -implicit-check-not=DW_TAG %s

; Build from source:
; $ clang++ a.cpp b.cpp -g -c -emit-llvm
; $ llvm-link a.bc b.bc -o ab.bc
; $ opt -inline ab.bc -o ab-opt.bc
; $ cat a.cpp
; extern int i;
; int func(int);
; int main() {
;   return func(i);
; }
; $ cat b.cpp
; int __attribute__((always_inline)) func(int x) {
;   return x * 2;
; }

; Ensure that func inlined into main is described and references the abstract
; definition in b.cpp's CU.

; CHECK: DW_TAG_compile_unit
; CHECK:   DW_AT_name {{.*}} "a.cpp"
; CHECK:   DW_TAG_subprogram
; CHECK:     DW_AT_type [DW_FORM_ref_addr] (0x00000000[[INT:.*]])
; CHECK:     DW_TAG_inlined_subroutine
; CHECK:       DW_AT_abstract_origin {{.*}}[[ABS_FUNC:........]])
; CHECK:       DW_TAG_formal_parameter
; CHECK:         DW_AT_abstract_origin {{.*}}[[ABS_VAR:........]])

; Check the abstract definition is in the 'b.cpp' CU and doesn't contain any
; concrete information (address range or variable location)
; CHECK: DW_TAG_compile_unit
; CHECK:   DW_AT_name {{.*}} "b.cpp"
; CHECK: 0x[[ABS_FUNC]]: DW_TAG_subprogram
; CHECK-NOT: DW_AT_low_pc
; CHECK: 0x[[ABS_VAR]]: DW_TAG_formal_parameter
; CHECK-NOT: DW_AT_location
; CHECK: DW_AT_type [DW_FORM_ref4] {{.*}} {0x[[INT]]}
; CHECK-NOT: DW_AT_location

; CHECK: 0x[[INT]]: DW_TAG_base_type
; CHECK:   DW_AT_name {{.*}} "int"

; Check the concrete out of line definition references the abstract and
; provides the address range and variable location
; CHECK: DW_TAG_subprogram
; CHECK:   DW_AT_low_pc
; CHECK:   DW_AT_abstract_origin {{.*}} {0x[[ABS_FUNC]]}
; CHECK:   DW_TAG_formal_parameter
; CHECK:     DW_AT_location
; CHECK:     DW_AT_abstract_origin {{.*}} {0x[[ABS_VAR]]}


@i = external global i32

; Function Attrs: uwtable
define i32 @main() #0 {
entry:
  %x.addr.i = alloca i32, align 4
  %retval = alloca i32, align 4
  store i32 0, i32* %retval
  %0 = load i32* @i, align 4, !dbg !19
  %1 = bitcast i32* %x.addr.i to i8*
  call void @llvm.lifetime.start(i64 4, i8* %1)
  store i32 %0, i32* %x.addr.i, align 4
  call void @llvm.dbg.declare(metadata !{i32* %x.addr.i}, metadata !20), !dbg !21
  %2 = load i32* %x.addr.i, align 4, !dbg !22
  %mul.i = mul nsw i32 %2, 2, !dbg !22
  %3 = bitcast i32* %x.addr.i to i8*, !dbg !22
  call void @llvm.lifetime.end(i64 4, i8* %3), !dbg !22
  ret i32 %mul.i, !dbg !19
}

; Function Attrs: alwaysinline nounwind uwtable
define i32 @_Z4funci(i32 %x) #1 {
entry:
  %x.addr = alloca i32, align 4
  store i32 %x, i32* %x.addr, align 4
  call void @llvm.dbg.declare(metadata !{i32* %x.addr}, metadata !20), !dbg !23
  %0 = load i32* %x.addr, align 4, !dbg !24
  %mul = mul nsw i32 %0, 2, !dbg !24
  ret i32 %mul, !dbg !24
}

; Function Attrs: nounwind readnone
declare void @llvm.dbg.declare(metadata, metadata) #2

; Function Attrs: nounwind
declare void @llvm.lifetime.start(i64, i8* nocapture) #3

; Function Attrs: nounwind
declare void @llvm.lifetime.end(i64, i8* nocapture) #3

attributes #0 = { 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 = { alwaysinline 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 #2 = { nounwind readnone }
attributes #3 = { nounwind }

!llvm.dbg.cu = !{!0, !9}
!llvm.module.flags = !{!16, !17}
!llvm.ident = !{!18, !18}

!0 = metadata !{i32 786449, metadata !1, i32 4, metadata !"clang version 3.5.0 ", i1 false, metadata !"", i32 0, metadata !2, metadata !2, metadata !3, metadata !2, metadata !2, metadata !"", i32 1} ; [ DW_TAG_compile_unit ] [/tmp/dbginfo/a.cpp] [DW_LANG_C_plus_plus]
!1 = metadata !{metadata !"a.cpp", metadata !"/tmp/dbginfo"}
!2 = metadata !{}
!3 = metadata !{metadata !4}
!4 = metadata !{i32 786478, metadata !1, metadata !5, metadata !"main", metadata !"main", metadata !"", i32 3, metadata !6, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, i32 ()* @main, null, null, metadata !2, i32 3} ; [ DW_TAG_subprogram ] [line 3] [def] [main]
!5 = metadata !{i32 786473, metadata !1}          ; [ DW_TAG_file_type ] [/tmp/dbginfo/a.cpp]
!6 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !7, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!7 = metadata !{metadata !8}
!8 = metadata !{i32 786468, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
!9 = metadata !{i32 786449, metadata !10, i32 4, metadata !"clang version 3.5.0 ", i1 false, metadata !"", i32 0, metadata !2, metadata !2, metadata !11, metadata !2, metadata !2, metadata !"", i32 1} ; [ DW_TAG_compile_unit ] [/tmp/dbginfo/b.cpp] [DW_LANG_C_plus_plus]
!10 = metadata !{metadata !"b.cpp", metadata !"/tmp/dbginfo"}
!11 = metadata !{metadata !12}
!12 = metadata !{i32 786478, metadata !10, metadata !13, metadata !"func", metadata !"func", metadata !"_Z4funci", i32 1, metadata !14, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, i32 (i32)* @_Z4funci, null, null, metadata !2, i32 1} ; [ DW_TAG_subprogram ] [line 1] [def] [func]
!13 = metadata !{i32 786473, metadata !10}        ; [ DW_TAG_file_type ] [/tmp/dbginfo/b.cpp]
!14 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !15, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!15 = metadata !{metadata !8, metadata !8}
!16 = metadata !{i32 2, metadata !"Dwarf Version", i32 4}
!17 = metadata !{i32 2, metadata !"Debug Info Version", i32 1}
!18 = metadata !{metadata !"clang version 3.5.0 "}
!19 = metadata !{i32 4, i32 0, metadata !4, null}
!20 = metadata !{i32 786689, metadata !12, metadata !"x", metadata !13, i32 16777217, metadata !8, i32 0, i32 0} ; [ DW_TAG_arg_variable ] [x] [line 1]
!21 = metadata !{i32 1, i32 0, metadata !12, metadata !19}
!22 = metadata !{i32 2, i32 0, metadata !12, metadata !19}
!23 = metadata !{i32 1, i32 0, metadata !12, null}
!24 = metadata !{i32 2, i32 0, metadata !12, null}