RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2024-11-23 11:13:28 +01:00
Code Issues Projects Releases Wiki Activity
93725d024d
llvm-mirror/test/Transforms/LoopUnroll/runtime-epilog-debuginfo.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

129 lines
8.1 KiB
LLVM
Raw Blame History

; RUN: opt -loop-unroll -unroll-runtime -unroll-runtime-epilog -S %s | FileCheck %s
; Test that epilogue is tagged with the same debug information as original loop body rather than original loop exit.
; CHECK: for.body.i:
; CHECK: br i1 {{.*}}, label %lee1.exit.loopexit.unr-lcssa.loopexit, label %for.body.i, !dbg ![[LOOP_LOC:[0-9]+]]
; CHECK: lee1.exit.loopexit.unr-lcssa.loopexit:
; CHECK: br label %lee1.exit.loopexit.unr-lcssa, !dbg ![[LOOP_LOC]]
; CHECK: lee1.exit.loopexit.unr-lcssa:
; CHECK: %lcmp.mod = icmp ne i32 %xtraiter, 0, !dbg ![[LOOP_LOC]]
; CHECK: br i1 %lcmp.mod, label %for.body.i.epil.preheader, label %lee1.exit.loopexit, !dbg ![[LOOP_LOC]]
; CHECK: for.body.i.epil.preheader:
; CHECK: br label %for.body.i.epil, !dbg ![[LOOP_LOC]]
; CHECK: lee1.exit.loopexit:
; CHECK: br label %lee1.exit, !dbg ![[EXIT_LOC:[0-9]+]]
; CHECK-DAG: ![[LOOP_LOC]] = !DILocation(line: 5, column: 3, scope: !{{.*}}, inlinedAt: !{{.*}})
; CHECK-DAG: ![[EXIT_LOC]] = !DILocation(line: 11, column: 12, scope: !{{.*}}, inlinedAt: !{{.*}})
; Function Attrs: nounwind readnone
define i32 @goo(i32 %a, i32 %b) local_unnamed_addr #0 !dbg !8 {
entry:
tail call void @llvm.dbg.value(metadata i32 %a, i64 0, metadata !13, metadata !15), !dbg !16
tail call void @llvm.dbg.value(metadata i32 %b, i64 0, metadata !14, metadata !15), !dbg !17
tail call void @llvm.dbg.value(metadata i32 %a, i64 0, metadata !18, metadata !15), !dbg !26
tail call void @llvm.dbg.value(metadata i32 %b, i64 0, metadata !21, metadata !15), !dbg !28
tail call void @llvm.dbg.value(metadata i32 0, i64 0, metadata !22, metadata !15), !dbg !29
tail call void @llvm.dbg.value(metadata i32 0, i64 0, metadata !23, metadata !15), !dbg !30
tail call void @llvm.dbg.value(metadata i32 0, i64 0, metadata !23, metadata !15), !dbg !30
tail call void @llvm.dbg.value(metadata i32 0, i64 0, metadata !22, metadata !15), !dbg !29
%cmp7.i = icmp eq i32 %b, 0, !dbg !31
br i1 %cmp7.i, label %lee1.exit, label %for.body.i.preheader, !dbg !33
for.body.i.preheader: ; preds = %entry
br label %for.body.i, !dbg !34
for.body.i: ; preds = %for.body.i.preheader, %for.body.i
%i.09.i = phi i32 [ %inc.i, %for.body.i ], [ 0, %for.body.i.preheader ]
%t.08.i = phi i32 [ %add1.i, %for.body.i ], [ 0, %for.body.i.preheader ]
%div.i = sdiv i32 %t.08.i, 2, !dbg !34
%add.i = add i32 %t.08.i, %a, !dbg !35
%add1.i = add i32 %add.i, %div.i, !dbg !36
tail call void @llvm.dbg.value(metadata i32 %add1.i, i64 0, metadata !22, metadata !15), !dbg !29
%inc.i = add nuw i32 %i.09.i, 1, !dbg !37
tail call void @llvm.dbg.value(metadata i32 %inc.i, i64 0, metadata !23, metadata !15), !dbg !30
tail call void @llvm.dbg.value(metadata i32 %inc.i, i64 0, metadata !23, metadata !15), !dbg !30
tail call void @llvm.dbg.value(metadata i32 %add1.i, i64 0, metadata !22, metadata !15), !dbg !29
%exitcond.i = icmp eq i32 %inc.i, %b, !dbg !31
br i1 %exitcond.i, label %lee1.exit.loopexit, label %for.body.i, !dbg !33, !llvm.loop !38
lee1.exit.loopexit: ; preds = %for.body.i
%add1.i.lcssa = phi i32 [ %add1.i, %for.body.i ]
br label %lee1.exit, !dbg !41
lee1.exit: ; preds = %lee1.exit.loopexit, %entry
%t.0.lcssa.i = phi i32 [ 0, %entry ], [ %add1.i.lcssa, %lee1.exit.loopexit ]
tail call void @llvm.dbg.value(metadata i32 %a, i64 0, metadata !44, metadata !15), !dbg !47
tail call void @llvm.dbg.value(metadata i32 %b, i64 0, metadata !45, metadata !15), !dbg !48
%add.i4 = add nsw i32 %b, %a, !dbg !41
%sub.i = sub nsw i32 %a, %b, !dbg !49
%mul.i = mul nsw i32 %add.i4, %sub.i, !dbg !50
%add = add nsw i32 %t.0.lcssa.i, %mul.i, !dbg !51
ret i32 %add, !dbg !52
}
; Function Attrs: nounwind readnone
declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #1
attributes #0 = { nounwind readnone "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="arm7tdmi" "target-features"="+neon,+strict-align,+vfp3,-crypto,-d16,-fp-armv8,-fp-only-sp,-fp16,-vfp4" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { nounwind readnone }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4, !5, !6}
!llvm.ident = !{!7}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "Snapdragon LLVM ARM Compiler 4.0.5 (based on llvm.org 4.0+)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
!1 = !DIFile(filename: "t.c", directory: "/prj/llvm-arm/scratch1/zhaoshiz/bugs/debug-symbol")
!2 = !{}
!3 = !{i32 2, !"Dwarf Version", i32 4}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = !{i32 1, !"wchar_size", i32 4}
!6 = !{i32 1, !"min_enum_size", i32 4}
!7 = !{!"Snapdragon LLVM ARM Compiler 4.0.5 (based on llvm.org 4.0+)"}
!8 = distinct !DISubprogram(name: "goo", scope: !1, file: !1, line: 23, type: !9, isLocal: false, isDefinition: true, scopeLine: 23, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !12)
!9 = !DISubroutineType(types: !10)
!10 = !{!11, !11, !11}
!11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!12 = !{!13, !14}
!13 = !DILocalVariable(name: "a", arg: 1, scope: !8, file: !1, line: 23, type: !11)
!14 = !DILocalVariable(name: "b", arg: 2, scope: !8, file: !1, line: 23, type: !11)
!15 = !DIExpression()
!16 = !DILocation(line: 23, column: 14, scope: !8)
!17 = !DILocation(line: 23, column: 21, scope: !8)
!18 = !DILocalVariable(name: "a", arg: 1, scope: !19, file: !1, line: 3, type: !11)
!19 = distinct !DISubprogram(name: "lee1", scope: !1, file: !1, line: 3, type: !9, isLocal: true, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !20)
!20 = !{!18, !21, !22, !23}
!21 = !DILocalVariable(name: "b", arg: 2, scope: !19, file: !1, line: 3, type: !11)
!22 = !DILocalVariable(name: "t", scope: !19, file: !1, line: 4, type: !11)
!23 = !DILocalVariable(name: "i", scope: !24, file: !1, line: 5, type: !25)
!24 = distinct !DILexicalBlock(scope: !19, file: !1, line: 5, column: 3)
!25 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
!26 = !DILocation(line: 3, column: 22, scope: !19, inlinedAt: !27)
!27 = distinct !DILocation(line: 24, column: 27, scope: !8)
!28 = !DILocation(line: 3, column: 29, scope: !19, inlinedAt: !27)
!29 = !DILocation(line: 4, column: 7, scope: !19, inlinedAt: !27)
!30 = !DILocation(line: 5, column: 17, scope: !24, inlinedAt: !27)
!31 = !DILocation(line: 5, column: 23, scope: !32, inlinedAt: !27)
!32 = distinct !DILexicalBlock(scope: !24, file: !1, line: 5, column: 3)
!33 = !DILocation(line: 5, column: 3, scope: !24, inlinedAt: !27)
!34 = !DILocation(line: 6, column: 13, scope: !32, inlinedAt: !27)
!35 = !DILocation(line: 6, column: 11, scope: !32, inlinedAt: !27)
!36 = !DILocation(line: 6, column: 7, scope: !32, inlinedAt: !27)
!37 = !DILocation(line: 5, column: 28, scope: !32, inlinedAt: !27)
!38 = distinct !{!38, !39, !40}
!39 = !DILocation(line: 5, column: 3, scope: !24)
!40 = !DILocation(line: 6, column: 14, scope: !24)
!41 = !DILocation(line: 11, column: 12, scope: !42, inlinedAt: !46)
!42 = distinct !DISubprogram(name: "lee2", scope: !1, file: !1, line: 10, type: !9, isLocal: true, isDefinition: true, scopeLine: 10, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !43)
!43 = !{!44, !45}
!44 = !DILocalVariable(name: "a", arg: 1, scope: !42, file: !1, line: 10, type: !11)
!45 = !DILocalVariable(name: "b", arg: 2, scope: !42, file: !1, line: 10, type: !11)
!46 = distinct !DILocation(line: 24, column: 40, scope: !8)
!47 = !DILocation(line: 10, column: 22, scope: !42, inlinedAt: !46)
!48 = !DILocation(line: 10, column: 29, scope: !42, inlinedAt: !46)
!49 = !DILocation(line: 11, column: 20, scope: !42, inlinedAt: !46)
!50 = !DILocation(line: 11, column: 16, scope: !42, inlinedAt: !46)
!51 = !DILocation(line: 24, column: 38, scope: !8)
!52 = !DILocation(line: 24, column: 3, scope: !8)
Reference in New Issue View Git Blame Copy Permalink