forked from OSchip/llvm-project
81 lines
3.5 KiB
LLVM
81 lines
3.5 KiB
LLVM
; REQUIRES: object-emission
|
|
|
|
; RUN: %llc_dwarf -O0 -filetype=obj < %s | llvm-dwarfdump -v -debug-info - | FileCheck %s
|
|
|
|
; Built from the following source with clang -O1
|
|
; struct S { int i; };
|
|
; int function(struct S s, int i) { return s.i + i; }
|
|
|
|
; Due to the X86_64 ABI, 's' is passed in registers and once optimized, the
|
|
; entirety of 's' is never reconstituted, since only the int is required, and
|
|
; thus the variable's location is unknown/dead to debug info.
|
|
|
|
; Future/current work should enable us to describe partial variables, which, in
|
|
; this case, happens to be the entire variable.
|
|
|
|
; CHECK: DW_TAG_subprogram
|
|
; CHECK-NOT: DW_TAG
|
|
; CHECK: DW_AT_name {{.*}} "function"
|
|
; CHECK-NOT: {{DW_TAG|NULL}}
|
|
; CHECK: DW_TAG_formal_parameter
|
|
; CHECK-NOT: DW_TAG
|
|
; CHECK: DW_AT_name {{.*}} "s"
|
|
; CHECK-NOT: DW_TAG
|
|
; FIXME: Even though 's' is never reconstituted into a struct, the one member
|
|
; variable is still live and used, and so we should be able to describe 's's
|
|
; location as the location of that int.
|
|
; CHECK-NOT: DW_AT_location
|
|
; CHECK-NOT: {{DW_TAG|NULL}}
|
|
; CHECK: DW_TAG_formal_parameter
|
|
; CHECK-NOT: DW_TAG
|
|
; CHECK: DW_AT_location
|
|
; CHECK-NOT: DW_TAG
|
|
; CHECK: DW_AT_name {{.*}} "i"
|
|
|
|
|
|
%struct.S = type { i32 }
|
|
|
|
; Function Attrs: nounwind readnone uwtable
|
|
define i32 @_Z8function1Si(i32 %s.coerce, i32 %i) #0 !dbg !9 {
|
|
entry:
|
|
tail call void @llvm.dbg.declare(metadata %struct.S* undef, metadata !14, metadata !DIExpression()), !dbg !20
|
|
tail call void @llvm.dbg.value(metadata i32 %i, metadata !15, metadata !DIExpression()), !dbg !20
|
|
%add = add nsw i32 %i, %s.coerce, !dbg !20
|
|
ret i32 %add, !dbg !20
|
|
}
|
|
|
|
; Function Attrs: nounwind readnone
|
|
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
|
|
|
|
; Function Attrs: nounwind readnone
|
|
declare void @llvm.dbg.value(metadata, metadata, metadata) #1
|
|
|
|
attributes #0 = { nounwind readnone uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "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 = !{!16, !17}
|
|
!llvm.ident = !{!18}
|
|
|
|
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 ", isOptimized: true, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !3, globals: !2, imports: !2)
|
|
!1 = !DIFile(filename: "dead-argument-order.cpp", directory: "/tmp/dbginfo")
|
|
!2 = !{}
|
|
!3 = !{!4}
|
|
!4 = !DICompositeType(tag: DW_TAG_structure_type, name: "S", line: 1, size: 32, align: 32, file: !1, elements: !5, identifier: "_ZTS1S")
|
|
!5 = !{!6}
|
|
!6 = !DIDerivedType(tag: DW_TAG_member, name: "i", line: 1, size: 32, align: 32, file: !1, scope: !4, baseType: !7)
|
|
!7 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
|
|
!9 = distinct !DISubprogram(name: "function", linkageName: "_Z8function1Si", line: 2, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, scopeLine: 2, file: !1, scope: !10, type: !11, variables: !13)
|
|
!10 = !DIFile(filename: "dead-argument-order.cpp", directory: "/tmp/dbginfo")
|
|
!11 = !DISubroutineType(types: !12)
|
|
!12 = !{!7, !4, !7}
|
|
!13 = !{!14, !15}
|
|
!14 = !DILocalVariable(name: "s", line: 2, arg: 1, scope: !9, file: !10, type: !4)
|
|
!15 = !DILocalVariable(name: "i", line: 2, arg: 2, scope: !9, file: !10, type: !7)
|
|
!16 = !{i32 2, !"Dwarf Version", i32 4}
|
|
!17 = !{i32 2, !"Debug Info Version", i32 3}
|
|
!18 = !{!"clang version 3.5.0 "}
|
|
!19 = !{%struct.S* undef}
|
|
!20 = !DILocation(line: 2, scope: !9)
|
|
|