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
; RUN: %llc_dwarf -dwarf-accel-tables=Enable -O0 -filetype=obj < %s | llvm-dwarfdump - | FileCheck --check-prefix=CHECK-ACCEL --check-prefix=CHECK %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:     0x[[INLINED:[0-9a-f]*]]:{{.*}}DW_TAG_inlined_subroutine
; CHECK:       DW_AT_abstract_origin {{.*}}[[ABS_FUNC:........]] "_Z4funci"
; CHECK:       DW_TAG_formal_parameter
; CHECK:         DW_AT_abstract_origin {{.*}}[[ABS_VAR:........]] "x"

; 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: 0x[[FUNC:[0-9a-f]*]]{{.*}}DW_TAG_subprogram
; CHECK:   DW_AT_low_pc
; CHECK:   DW_AT_abstract_origin {{.*}} {0x[[ABS_FUNC]]} "_Z4funci"
; CHECK:   DW_TAG_formal_parameter
; CHECK:     DW_AT_location
; CHECK:     DW_AT_abstract_origin {{.*}} {0x[[ABS_VAR]]} "x"

; Check that both the inline and the non out of line version of func are
; correctly referenced in the accelerator table. Before r221837, the one
; in the second compilation unit had a wrong offset
; CHECK-ACCEL: .apple_names contents:
; CHECK-ACCEL: Name{{.*}}"func"
; CHECK-ACCEL-NOT: Name
; CHECK-ACCEL: Atom[0]{{.*}}[[INLINED]]
; CHECK-ACCEL-NOT: Name
; CHECK-ACCEL: Atom[0]{{.*}}[[FUNC]]

@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, 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 !120, metadata !MDExpression()), !dbg !21
  %2 = load i32, 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, metadata !MDExpression()), !dbg !23
  %0 = load i32, 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, 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 = !MDCompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 ", isOptimized: false, emissionKind: 1, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2)
!1 = !MDFile(filename: "a.cpp", directory: "/tmp/dbginfo")
!2 = !{}
!3 = !{!4}
!4 = !MDSubprogram(name: "main", line: 3, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 3, file: !1, scope: !5, type: !6, function: i32 ()* @main, variables: !2)
!5 = !MDFile(filename: "a.cpp", directory: "/tmp/dbginfo")
!6 = !MDSubroutineType(types: !7)
!7 = !{!8}
!8 = !MDBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!9 = !MDCompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 ", isOptimized: false, emissionKind: 1, file: !10, enums: !2, retainedTypes: !2, subprograms: !11, globals: !2, imports: !2)
!10 = !MDFile(filename: "b.cpp", directory: "/tmp/dbginfo")
!11 = !{!12}
!12 = !MDSubprogram(name: "func", linkageName: "_Z4funci", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 1, file: !10, scope: !13, type: !14, function: i32 (i32)* @_Z4funci, variables: !2)
!13 = !MDFile(filename: "b.cpp", directory: "/tmp/dbginfo")
!14 = !MDSubroutineType(types: !15)
!15 = !{!8, !8}
!16 = !{i32 2, !"Dwarf Version", i32 4}
!17 = !{i32 2, !"Debug Info Version", i32 3}
!18 = !{!"clang version 3.5.0 "}
!19 = !MDLocation(line: 4, scope: !4)
!20 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "x", line: 1, arg: 1, scope: !12, file: !13, type: !8)

!120 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "x", line: 1, arg: 1, scope: !12, file: !13, type: !8)

!21 = !MDLocation(line: 1, scope: !12, inlinedAt: !19)
!22 = !MDLocation(line: 2, scope: !12, inlinedAt: !19)
!23 = !MDLocation(line: 1, scope: !12)
!24 = !MDLocation(line: 2, scope: !12)