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clang-p2996/llvm/test/Transforms/LoopUnroll/runtime-epilog-debuginfo.ll
Jeremy Morse 59fab22642 [DebugInfo][RemoveDIs] Support cloning and remapping DPValues (#72546) 
This patch adds support for CloneBasicBlock duplicating the DPValues
attached to instructions, and adds facilities to remap them into their new
context. The plumbing to achieve this is fairly straightforwards and
mechanical.

I've also added illustrative uses to LoopUnrollRuntime, SimpleLoopUnswitch
and SimplifyCFG. The former only updates for the epilogue right now so I've
added CHECK lines just for the end of an unrolled loop (further updates
coming later). SimpleLoopUnswitch had no debug-info tests so I've added a
new one. The two modified parts of SimplifyCFG are covered by the two
modified SimplifyCFG tests.

These are scenarios where we have to do extra cloning for copying of
DPValues because they're no longer instructions, and remap them too.
2023-11-24 15:17:32 +00:00

142 lines
8.9 KiB
LLVM
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; RUN: opt -passes=loop-unroll -unroll-runtime -unroll-runtime-epilog -S %s | FileCheck %s
; RUN: opt -passes=loop-unroll -unroll-runtime -unroll-runtime-epilog -S %s --try-experimental-debuginfo-iterators | 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: for.body.i.epil:
;; Ensure that when we clone the div/add/add and its following dbg.values,
;; those dbg.values are remapped to the duplicated adds, not the originals.
; CHECK: %div.i.epil = sdiv i32 %t.08.i.epil, 2,
; CHECK-NEXT: %add.i.epil = add i32 %t.08.i.epil, %a,
; CHECK-NEXT: %add1.i.epil = add i32 %add.i.epil, %div.i.epil,
; CHECK-NEXT: call void @llvm.dbg.value(metadata i32 %add1.i.epil,
; CHECK-NEXT: %inc.i.epil = add nuw i32 %i.09.i.epil, 1, !dbg !36
; CHECK-NEXT: call void @llvm.dbg.value(metadata i32 %inc.i.epil,
; CHECK-NEXT: call void @llvm.dbg.value(metadata i32 %inc.i.epil,
; CHECK-NEXT: call void @llvm.dbg.value(metadata i32 %add1.i.epil,
; 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" "frame-pointer"="all" "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,-fp-armv8,-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, inlinedAt: !27)
!40 = !DILocation(line: 6, column: 14, scope: !24, inlinedAt: !27)
!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)
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