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llvm-mirror/test/DebugInfo/X86/dbg-value-inlined-parameter.ll
Shiva Chen a2029fa58e [DebugInfo] Add DILabel metadata and intrinsic llvm.dbg.label. 
In order to set breakpoints on labels and list source code around
labels, we need collect debug information for labels, i.e., label
name, the function label belong, line number in the file, and the
address label located. In order to keep these information in LLVM
IR and to allow backend to generate debug information correctly.
We create a new kind of metadata for labels, DILabel. The format
of DILabel is

!DILabel(scope: !1, name: "foo", file: !2, line: 3)

We hope to keep debug information as much as possible even the
code is optimized. So, we create a new kind of intrinsic for label
metadata to avoid the metadata is eliminated with basic block.
The intrinsic will keep existing if we keep it from optimized out.
The format of the intrinsic is

llvm.dbg.label(metadata !1)

It has only one argument, that is the DILabel metadata. The
intrinsic will follow the label immediately. Backend could get the
label metadata through the intrinsic's parameter.

We also create DIBuilder API for labels to be used by Frontend.
Frontend could use createLabel() to allocate DILabel objects, and use
insertLabel() to insert llvm.dbg.label intrinsic in LLVM IR.

Differential Revision: https://reviews.llvm.org/D45024

Patch by Hsiangkai Wang.

llvm-svn: 331841
2018-05-09 02:40:45 +00:00

130 lines
6.1 KiB
LLVM
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; RUN: llc -mtriple=x86_64-apple-darwin < %s -filetype=obj \
; RUN: | llvm-dwarfdump -v -debug-info - | FileCheck --check-prefix=CHECK --check-prefix=DARWIN %s
; RUN: llc -mtriple=x86_64-linux-gnu < %s -filetype=obj \
; RUN: | llvm-dwarfdump -v -debug-info - | FileCheck --check-prefix=CHECK --check-prefix=LINUX %s
; RUN: llc -mtriple=x86_64-apple-darwin < %s -filetype=obj -regalloc=basic \
; RUN: | llvm-dwarfdump -v -debug-info - | FileCheck --check-prefix=CHECK --check-prefix=DARWIN %s
; CHECK: DW_TAG_subprogram
; CHECK: DW_AT_abstract_origin {{.*}} "foo"
; CHECK: DW_TAG_formal_parameter
; CHECK-NOT: DW_TAG
; CHECK: DW_AT_abstract_origin {{.*}} "sp"
; CHECK: DW_TAG_formal_parameter
; CHECK-NOT: DW_TAG
; CHECK: DW_AT_abstract_origin {{.*}} "nums"
; CHECK: DW_TAG_subprogram
; CHECK-NOT: DW_TAG
; CHECK: DW_AT_name {{.*}} "foo"
; CHECK: DW_TAG_formal_parameter
; CHECK-NOT: DW_TAG
; CHECK: DW_AT_name {{.*}} "sp"
; CHECK: DW_TAG_formal_parameter
; CHECK-NOT: DW_TAG
; CHECK: DW_AT_name {{.*}} "nums"
;CHECK: DW_TAG_inlined_subroutine
;CHECK-NEXT: DW_AT_abstract_origin {{.*}} "foo"
;CHECK-NEXT: DW_AT_low_pc [DW_FORM_addr]
;CHECK-NEXT: DW_AT_high_pc [DW_FORM_data4]
;CHECK-NEXT: DW_AT_call_file
;CHECK-NEXT: DW_AT_call_line
;CHECK: DW_TAG_formal_parameter
;FIXME: Linux shouldn't drop this parameter either...
;CHECK-NOT: DW_TAG
;DARWIN: DW_AT_abstract_origin {{.*}} "sp"
;DARWIN: DW_TAG_formal_parameter
;CHECK: DW_AT_abstract_origin {{.*}} "nums"
;CHECK-NOT: DW_TAG_formal_parameter
source_filename = "test/DebugInfo/X86/dbg-value-inlined-parameter.ll"
%struct.S1 = type { float*, i32 }
@p = common global %struct.S1 zeroinitializer, align 8, !dbg !0
; Function Attrs: nounwind optsize ssp
define i32 @foo(%struct.S1* nocapture %sp, i32 %nums) #0 !dbg !15 {
entry:
tail call void @llvm.dbg.value(metadata %struct.S1* %sp, metadata !19, metadata !22), !dbg !23
tail call void @llvm.dbg.value(metadata i32 %nums, metadata !21, metadata !22), !dbg !24
%tmp2 = getelementptr inbounds %struct.S1, %struct.S1* %sp, i64 0, i32 1, !dbg !25
store i32 %nums, i32* %tmp2, align 4, !dbg !25
%call = tail call float* @bar(i32 %nums) #3, !dbg !27
%tmp5 = getelementptr inbounds %struct.S1, %struct.S1* %sp, i64 0, i32 0, !dbg !27
store float* %call, float** %tmp5, align 8, !dbg !27
%cmp = icmp ne float* %call, null, !dbg !28
%cond = zext i1 %cmp to i32, !dbg !28
ret i32 %cond, !dbg !28
}
; Function Attrs: optsize
declare float* @bar(i32) #1
; Function Attrs: nounwind optsize ssp
define void @foobar() #0 !dbg !29 {
entry:
tail call void @llvm.dbg.value(metadata %struct.S1* @p, metadata !19, metadata !22) #4, !dbg !32
tail call void @llvm.dbg.value(metadata i32 1, metadata !21, metadata !22) #4, !dbg !35
store i32 1, i32* getelementptr inbounds (%struct.S1, %struct.S1* @p, i64 0, i32 1), align 8, !dbg !36
%call.i = tail call float* @bar(i32 1) #3, !dbg !37
store float* %call.i, float** getelementptr inbounds (%struct.S1, %struct.S1* @p, i64 0, i32 0), align 8, !dbg !37
ret void, !dbg !38
}
; Function Attrs: nounwind readnone
declare void @llvm.dbg.value(metadata, metadata, metadata) #2
attributes #0 = { nounwind optsize ssp }
attributes #1 = { optsize }
attributes #2 = { nounwind readnone }
attributes #3 = { nounwind optsize }
attributes #4 = { nounwind }
!llvm.dbg.cu = !{!2}
!llvm.module.flags = !{!14}
!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
!1 = !DIGlobalVariable(name: "p", scope: !2, file: !3, line: 14, type: !6, isLocal: false, isDefinition: true)
!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 2.9 (trunk 125693)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, retainedTypes: !4, globals: !5, imports: !4)
!3 = !DIFile(filename: "nm2.c", directory: "/private/tmp")
!4 = !{}
!5 = !{!0}
!6 = !DIDerivedType(tag: DW_TAG_typedef, name: "S1", scope: !2, file: !3, line: 4, baseType: !7)
!7 = !DICompositeType(tag: DW_TAG_structure_type, name: "S1", scope: !2, file: !3, line: 1, size: 128, align: 64, elements: !8)
!8 = !{!9, !12}
!9 = !DIDerivedType(tag: DW_TAG_member, name: "m", scope: !3, file: !3, line: 2, baseType: !10, size: 64, align: 64)
!10 = !DIDerivedType(tag: DW_TAG_pointer_type, scope: !2, baseType: !11, size: 64, align: 64)
!11 = !DIBasicType(name: "float", size: 32, align: 32, encoding: DW_ATE_float)
!12 = !DIDerivedType(tag: DW_TAG_member, name: "nums", scope: !3, file: !3, line: 3, baseType: !13, size: 32, align: 32, offset: 64)
!13 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!14 = !{i32 1, !"Debug Info Version", i32 3}
!15 = distinct !DISubprogram(name: "foo", scope: !3, file: !3, line: 8, type: !16, isLocal: false, isDefinition: true, scopeLine: 8, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !2, retainedNodes: !18)
!16 = !DISubroutineType(types: !17)
!17 = !{!13}
!18 = !{!19, !21}
!19 = !DILocalVariable(name: "sp", arg: 1, scope: !15, file: !3, line: 7, type: !20)
!20 = !DIDerivedType(tag: DW_TAG_pointer_type, scope: !2, baseType: !6, size: 64, align: 64)
!21 = !DILocalVariable(name: "nums", arg: 2, scope: !15, file: !3, line: 7, type: !13)
!22 = !DIExpression()
!23 = !DILocation(line: 7, column: 13, scope: !15)
!24 = !DILocation(line: 7, column: 21, scope: !15)
!25 = !DILocation(line: 9, column: 3, scope: !26)
!26 = distinct !DILexicalBlock(scope: !15, file: !3, line: 8, column: 1)
!27 = !DILocation(line: 10, column: 3, scope: !26)
!28 = !DILocation(line: 11, column: 3, scope: !26)
!29 = distinct !DISubprogram(name: "foobar", scope: !3, file: !3, line: 15, type: !30, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: true, unit: !2)
!30 = !DISubroutineType(types: !31)
!31 = !{null}
!32 = !DILocation(line: 7, column: 13, scope: !15, inlinedAt: !33)
!33 = !DILocation(line: 16, column: 3, scope: !34)
!34 = distinct !DILexicalBlock(scope: !29, file: !3, line: 15, column: 15)
!35 = !DILocation(line: 7, column: 21, scope: !15, inlinedAt: !33)
!36 = !DILocation(line: 9, column: 3, scope: !26, inlinedAt: !33)
!37 = !DILocation(line: 10, column: 3, scope: !26, inlinedAt: !33)
!38 = !DILocation(line: 17, column: 1, scope: !34)
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