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llvm-project/llvm/test/Transforms/LoopUnroll/runtime-epilog-debuginfo.ll
Stephen Tozer 094572701d
[RemoveDIs] Print IR with debug records by default (#91724) 
This patch makes the final major change of the RemoveDIs project, changing the
default IR output from debug intrinsics to debug records. This is expected to
break a large number of tests: every single one that tests for uses or
declarations of debug intrinsics and does not explicitly disable writing
records. 

If this patch has broken your downstream tests (or upstream tests on a
configuration I wasn't able to run):
1. If you need to immediately unblock a build, pass
`--write-experimental-debuginfo=false` to LLVM's option processing for all
failing tests (remember to use `-mllvm` for clang/flang to forward arguments to
LLVM).
2. For most test failures, the changes are trivial and mechanical, enough that
they can be done by script; see the migration guide for a guide on how to do
this: https://llvm.org/docs/RemoveDIsDebugInfo.html#test-updates
3. If any tests fail for reasons other than FileCheck check lines that need
updating, such as assertion failures, that is most likely a real bug with this
patch and should be reported as such.

For more information, see the recent PSA:
https://discourse.llvm.org/t/psa-ir-output-changing-from-debug-intrinsics-to-debug-records/79578
2024-06-14 15:07:27 +01:00

142 lines
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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: #dbg_value(i32 %add1.i.epil,
; CHECK-NEXT: %inc.i.epil = add nuw i32 %i.09.i.epil, 1, !dbg !36
; CHECK-NEXT: #dbg_value(i32 %inc.i.epil,
; CHECK-NEXT: #dbg_value(i32 %inc.i.epil,
; CHECK-NEXT: #dbg_value(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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