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llvm-mirror/test/DebugInfo/AArch64/inlined-argument.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

141 lines
7.2 KiB
LLVM
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; RUN: llc -filetype=obj -o - %s | llvm-dwarfdump --name resource - | FileCheck %s
; CHECK: DW_TAG_formal_parameter
; CHECK: DW_TAG_formal_parameter
; CHECK-NEXT: DW_AT_location (DW_OP_reg1 W1)
; CHECK-NEXT: DW_AT_abstract_origin {{.*}}"resource"
;
; Generated from:
; typedef struct t *t_t;
; extern unsigned int enable;
; struct t {
; struct q {
; struct q *next;
; unsigned long long resource;
; } * s;
; } * tt;
; static unsigned long find(t_t t, unsigned long long resource) {
; struct q *q;
; q = t->s;
; while (q) {
; if (q->resource == resource)
; return q;
; q = q->next;
; }
; }
; int g(t_t t, unsigned long long r) {
; struct q *q;
; q = find(t, r);
; if (!q)
; if (__builtin_expect(enable, 0)) { }
; }
source_filename = "test.i"
target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
target triple = "arm64-apple-ios5.0.0"
%struct.t = type { %struct.q* }
%struct.q = type { %struct.q*, i64 }
@tt = local_unnamed_addr global %struct.t* null, align 8, !dbg !0
; Function Attrs: noredzone nounwind readonly ssp
define i32 @g(%struct.t* nocapture readonly %t, i64 %r) local_unnamed_addr #0 !dbg !20 {
entry:
tail call void @llvm.dbg.value(metadata %struct.t* %t, metadata !26, metadata !DIExpression()), !dbg !29
tail call void @llvm.dbg.value(metadata i64 %r, metadata !27, metadata !DIExpression()), !dbg !30
tail call void @llvm.dbg.value(metadata %struct.t* %t, metadata !31, metadata !DIExpression()), !dbg !39
tail call void @llvm.dbg.value(metadata i64 %r, metadata !37, metadata !DIExpression()), !dbg !41
%s.i5 = bitcast %struct.t* %t to %struct.q**
tail call void @llvm.dbg.value(metadata %struct.q** %s.i5, metadata !38, metadata !DIExpression(DW_OP_deref)), !dbg !42
%q.06.i = load %struct.q*, %struct.q** %s.i5, align 8
tail call void @llvm.dbg.value(metadata %struct.q* %q.06.i, metadata !38, metadata !DIExpression()), !dbg !42
%tobool7.i = icmp eq %struct.q* %q.06.i, null, !dbg !43
br i1 %tobool7.i, label %find.exit, label %while.body.i.preheader, !dbg !43
while.body.i.preheader: ; preds = %entry
br label %while.body.i, !dbg !44
while.body.i: ; preds = %while.body.i.preheader, %if.end.i
%q.08.i = phi %struct.q* [ %q.0.i, %if.end.i ], [ %q.06.i, %while.body.i.preheader ]
%resource1.i = getelementptr inbounds %struct.q, %struct.q* %q.08.i, i64 0, i32 1, !dbg !44
%0 = load i64, i64* %resource1.i, align 8, !dbg !44
%cmp.i = icmp eq i64 %0, %r, !dbg !47
br i1 %cmp.i, label %find.exit, label %if.end.i, !dbg !48
if.end.i: ; preds = %while.body.i
%next.i6 = bitcast %struct.q* %q.08.i to %struct.q**
tail call void @llvm.dbg.value(metadata %struct.q** %next.i6, metadata !38, metadata !DIExpression(DW_OP_deref)), !dbg !42
%q.0.i = load %struct.q*, %struct.q** %next.i6, align 8
tail call void @llvm.dbg.value(metadata %struct.q* %q.0.i, metadata !38, metadata !DIExpression()), !dbg !42
%tobool.i = icmp eq %struct.q* %q.0.i, null, !dbg !43
br i1 %tobool.i, label %find.exit, label %while.body.i, !dbg !43, !llvm.loop !49
find.exit: ; preds = %while.body.i, %if.end.i, %entry
ret i32 undef, !dbg !52
}
; Function Attrs: nounwind readnone speculatable
declare void @llvm.dbg.value(metadata, metadata, metadata) #1
attributes #0 = { noredzone nounwind readonly ssp }
attributes #1 = { nounwind readnone speculatable }
!llvm.dbg.cu = !{!2}
!llvm.module.flags = !{!16, !17, !18}
!llvm.ident = !{!19}
!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
!1 = distinct !DIGlobalVariable(name: "tt", scope: !2, file: !3, line: 8, type: !6, isLocal: false, isDefinition: true)
!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 6.0.0 (trunk 317516) (llvm/trunk 317518)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5)
!3 = !DIFile(filename: "test.i", directory: "/")
!4 = !{}
!5 = !{!0}
!6 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !7, size: 64)
!7 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "t", file: !3, line: 3, size: 64, elements: !8)
!8 = !{!9}
!9 = !DIDerivedType(tag: DW_TAG_member, name: "s", scope: !7, file: !3, line: 7, baseType: !10, size: 64)
!10 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !11, size: 64)
!11 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "q", file: !3, line: 4, size: 128, elements: !12)
!12 = !{!13, !14}
!13 = !DIDerivedType(tag: DW_TAG_member, name: "next", scope: !11, file: !3, line: 5, baseType: !10, size: 64)
!14 = !DIDerivedType(tag: DW_TAG_member, name: "resource", scope: !11, file: !3, line: 6, baseType: !15, size: 64, offset: 64)
!15 = !DIBasicType(name: "long long unsigned int", size: 64, encoding: DW_ATE_unsigned)
!16 = !{i32 2, !"Dwarf Version", i32 2}
!17 = !{i32 2, !"Debug Info Version", i32 3}
!18 = !{i32 1, !"wchar_size", i32 4}
!19 = !{!"clang version 6.0.0 (trunk 317516) (llvm/trunk 317518)"}
!20 = distinct !DISubprogram(name: "g", scope: !3, file: !3, line: 18, type: !21, isLocal: false, isDefinition: true, scopeLine: 18, flags: DIFlagPrototyped, isOptimized: true, unit: !2, retainedNodes: !25)
!21 = !DISubroutineType(types: !22)
!22 = !{!23, !24, !15}
!23 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!24 = !DIDerivedType(tag: DW_TAG_typedef, name: "t_t", file: !3, line: 1, baseType: !6)
!25 = !{!26, !27, !28}
!26 = !DILocalVariable(name: "t", arg: 1, scope: !20, file: !3, line: 18, type: !24)
!27 = !DILocalVariable(name: "r", arg: 2, scope: !20, file: !3, line: 18, type: !15)
!28 = !DILocalVariable(name: "q", scope: !20, file: !3, line: 19, type: !10)
!29 = !DILocation(line: 18, column: 11, scope: !20)
!30 = !DILocation(line: 18, column: 33, scope: !20)
!31 = !DILocalVariable(name: "t", arg: 1, scope: !32, file: !3, line: 9, type: !24)
!32 = distinct !DISubprogram(name: "find", scope: !3, file: !3, line: 9, type: !33, isLocal: true, isDefinition: true, scopeLine: 9, flags: DIFlagPrototyped, isOptimized: true, unit: !2, retainedNodes: !36)
!33 = !DISubroutineType(types: !34)
!34 = !{!35, !24, !15}
!35 = !DIBasicType(name: "long unsigned int", size: 64, encoding: DW_ATE_unsigned)
!36 = !{!31, !37, !38}
!37 = !DILocalVariable(name: "resource", arg: 2, scope: !32, file: !3, line: 9, type: !15)
!38 = !DILocalVariable(name: "q", scope: !32, file: !3, line: 10, type: !10)
!39 = !DILocation(line: 9, column: 31, scope: !32, inlinedAt: !40)
!40 = distinct !DILocation(line: 20, column: 7, scope: !20)
!41 = !DILocation(line: 9, column: 53, scope: !32, inlinedAt: !40)
!42 = !DILocation(line: 10, column: 13, scope: !32, inlinedAt: !40)
!43 = !DILocation(line: 12, column: 3, scope: !32, inlinedAt: !40)
!44 = !DILocation(line: 13, column: 12, scope: !45, inlinedAt: !40)
!45 = distinct !DILexicalBlock(scope: !46, file: !3, line: 13, column: 9)
!46 = distinct !DILexicalBlock(scope: !32, file: !3, line: 12, column: 13)
!47 = !DILocation(line: 13, column: 21, scope: !45, inlinedAt: !40)
!48 = !DILocation(line: 13, column: 9, scope: !46, inlinedAt: !40)
!49 = distinct !{!49, !50, !51}
!50 = !DILocation(line: 12, column: 3, scope: !32)
!51 = !DILocation(line: 16, column: 3, scope: !32)
!52 = !DILocation(line: 24, column: 1, scope: !20)
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