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clang-p2996/llvm/test/DebugInfo/Generic/assignment-tracking/sroa/id.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

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; RUN: opt -passes=sroa -S %s -o - | FileCheck %s
; RUN: opt --try-experimental-debuginfo-iterators -passes=sroa -S %s -o - | FileCheck %s
;; Check that multiple dbg.assign intrinsics linked to a store that is getting
;; split (or at least that is touched by SROA, causing a replacement store to
;; be generated) are still both linked to the new store(s).
;;
;; Additionally, check that SROA inserts new dbg.assign intrinsics by the
;; originals.
;; $ cat test.cpp
;; class a {
;; public:
;; a(int, float &) {}
;; };
;; float b, d;
;; int c;
;; void f() {
;; float e;
;; if (c)
;; e = b;
;; else
;; e = b / d;
;; a(c, e);
;; }
;;
;; Generated by grabbing IR before sroa in:
;; $ clang++ -O2 -g -c test.cpp -Xclang -fexperimental-assignment-tracking
; CHECK: if.then:
; CHECK-NEXT: %1 = load float
; CHECK-NEXT: #dbg_value(float %storemerge, ![[var:[0-9]+]], !DIExpression(),
; CHECK: if.else:
; CHECK-NEXT: %2 = load float
; CHECK-NEXT: %3 = load float
; CHECK-NEXT: %div = fdiv float
; CHECK: #dbg_value(float %storemerge, ![[var]], !DIExpression(),
%class.a = type { i8 }
$_ZN1aC2EiRf = comdat any
@b = dso_local local_unnamed_addr global float 0.000000e+00, align 4, !dbg !0
@d = dso_local local_unnamed_addr global float 0.000000e+00, align 4, !dbg !6
@c = dso_local local_unnamed_addr global i32 0, align 4, !dbg !9
; Function Attrs: nounwind readonly uwtable
define dso_local void @_Z1fv() local_unnamed_addr #0 !dbg !16 {
entry:
%e = alloca float, align 4, !DIAssignID !21
call void @llvm.dbg.assign(metadata i1 undef, metadata !20, metadata !DIExpression(), metadata !21, metadata ptr %e, metadata !DIExpression()), !dbg !22
%agg.tmp.ensured = alloca %class.a, align 1
%0 = bitcast ptr %e to ptr, !dbg !23
call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %0) #4, !dbg !23
%1 = load i32, ptr @c, align 4, !dbg !24
%tobool.not = icmp eq i32 %1, 0, !dbg !24
br i1 %tobool.not, label %if.else, label %if.then, !dbg !30
if.then: ; preds = %entry
%2 = load float, ptr @b, align 4, !dbg !31
call void @llvm.dbg.assign(metadata float %2, metadata !20, metadata !DIExpression(), metadata !34, metadata ptr %e, metadata !DIExpression()), !dbg !22
br label %if.end, !dbg !35
if.else: ; preds = %entry
%3 = load float, ptr @b, align 4, !dbg !36
%4 = load float, ptr @d, align 4, !dbg !37
%div = fdiv float %3, %4, !dbg !38
call void @llvm.dbg.assign(metadata float %div, metadata !20, metadata !DIExpression(), metadata !34, metadata ptr %e, metadata !DIExpression()), !dbg !22
br label %if.end
if.end: ; preds = %if.else, %if.then
%storemerge = phi float [ %div, %if.else ], [ %2, %if.then ], !dbg !39
store float %storemerge, ptr %e, align 4, !dbg !39, !DIAssignID !34
%5 = load i32, ptr @c, align 4, !dbg !40
call void @llvm.dbg.assign(metadata i1 undef, metadata !41, metadata !DIExpression(), metadata !54, metadata ptr undef, metadata !DIExpression()), !dbg !55
call void @llvm.dbg.assign(metadata i1 undef, metadata !51, metadata !DIExpression(), metadata !57, metadata ptr undef, metadata !DIExpression()), !dbg !55
call void @llvm.dbg.assign(metadata i1 undef, metadata !52, metadata !DIExpression(), metadata !58, metadata ptr undef, metadata !DIExpression()), !dbg !55
call void @llvm.dbg.assign(metadata ptr %agg.tmp.ensured, metadata !41, metadata !DIExpression(), metadata !59, metadata ptr undef, metadata !DIExpression()), !dbg !55
call void @llvm.dbg.assign(metadata i32 %5, metadata !51, metadata !DIExpression(), metadata !60, metadata ptr undef, metadata !DIExpression()), !dbg !55
call void @llvm.dbg.assign(metadata ptr %e, metadata !52, metadata !DIExpression(), metadata !61, metadata ptr undef, metadata !DIExpression()), !dbg !55
call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %0) #4, !dbg !62
ret void, !dbg !62
}
; Function Attrs: argmemonly nofree nosync nounwind willreturn
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1
; Function Attrs: nounwind uwtable
define linkonce_odr dso_local void @_ZN1aC2EiRf(ptr %this, i32 %0, ptr nonnull align 4 dereferenceable(4) %1) unnamed_addr #2 comdat align 2 !dbg !42 {
entry:
call void @llvm.dbg.assign(metadata i1 undef, metadata !41, metadata !DIExpression(), metadata !63, metadata ptr undef, metadata !DIExpression()), !dbg !64
call void @llvm.dbg.assign(metadata i1 undef, metadata !51, metadata !DIExpression(), metadata !65, metadata ptr undef, metadata !DIExpression()), !dbg !64
call void @llvm.dbg.assign(metadata i1 undef, metadata !52, metadata !DIExpression(), metadata !66, metadata ptr undef, metadata !DIExpression()), !dbg !64
call void @llvm.dbg.assign(metadata ptr %this, metadata !41, metadata !DIExpression(), metadata !67, metadata ptr undef, metadata !DIExpression()), !dbg !64
call void @llvm.dbg.assign(metadata i32 %0, metadata !51, metadata !DIExpression(), metadata !68, metadata ptr undef, metadata !DIExpression()), !dbg !64
call void @llvm.dbg.assign(metadata ptr %1, metadata !52, metadata !DIExpression(), metadata !69, metadata ptr undef, metadata !DIExpression()), !dbg !64
ret void, !dbg !70
}
; Function Attrs: argmemonly nofree nosync nounwind willreturn
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1
; Function Attrs: nofree nosync nounwind readnone speculatable willreturn
declare void @llvm.dbg.assign(metadata, metadata, metadata, metadata, metadata, metadata) #3
!llvm.dbg.cu = !{!2}
!llvm.module.flags = !{!12, !13, !14, !1000}
!llvm.ident = !{!15}
!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
!1 = distinct !DIGlobalVariable(name: "b", scope: !2, file: !3, line: 5, type: !8, isLocal: false, isDefinition: true)
!2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "clang version 12.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5, splitDebugInlining: false, nameTableKind: None)
!3 = !DIFile(filename: "reduce.cpp", directory: "")
!4 = !{}
!5 = !{!0, !6, !9}
!6 = !DIGlobalVariableExpression(var: !7, expr: !DIExpression())
!7 = distinct !DIGlobalVariable(name: "d", scope: !2, file: !3, line: 5, type: !8, isLocal: false, isDefinition: true)
!8 = !DIBasicType(name: "float", size: 32, encoding: DW_ATE_float)
!9 = !DIGlobalVariableExpression(var: !10, expr: !DIExpression())
!10 = distinct !DIGlobalVariable(name: "c", scope: !2, file: !3, line: 6, type: !11, isLocal: false, isDefinition: true)
!11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!12 = !{i32 7, !"Dwarf Version", i32 4}
!13 = !{i32 2, !"Debug Info Version", i32 3}
!14 = !{i32 1, !"wchar_size", i32 4}
!15 = !{!"clang version 12.0.0"}
!16 = distinct !DISubprogram(name: "f", linkageName: "_Z1fv", scope: !3, file: !3, line: 7, type: !17, scopeLine: 7, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !19)
!17 = !DISubroutineType(types: !18)
!18 = !{null}
!19 = !{!20}
!20 = !DILocalVariable(name: "e", scope: !16, file: !3, line: 8, type: !8)
!21 = distinct !DIAssignID()
!22 = !DILocation(line: 0, scope: !16)
!23 = !DILocation(line: 8, column: 3, scope: !16)
!24 = !DILocation(line: 9, column: 7, scope: !25)
!25 = distinct !DILexicalBlock(scope: !16, file: !3, line: 9, column: 7)
!30 = !DILocation(line: 9, column: 7, scope: !16)
!31 = !DILocation(line: 10, column: 9, scope: !25)
!34 = distinct !DIAssignID()
!35 = !DILocation(line: 10, column: 5, scope: !25)
!36 = !DILocation(line: 12, column: 9, scope: !25)
!37 = !DILocation(line: 12, column: 13, scope: !25)
!38 = !DILocation(line: 12, column: 11, scope: !25)
!39 = !DILocation(line: 0, scope: !25)
!40 = !DILocation(line: 13, column: 5, scope: !16)
!41 = !DILocalVariable(name: "this", arg: 1, scope: !42, type: !53, flags: DIFlagArtificial | DIFlagObjectPointer)
!42 = distinct !DISubprogram(name: "a", linkageName: "_ZN1aC2EiRf", scope: !43, file: !3, line: 3, type: !46, scopeLine: 3, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, declaration: !45, retainedNodes: !50)
!43 = distinct !DICompositeType(tag: DW_TAG_class_type, name: "a", file: !3, line: 1, size: 8, flags: DIFlagTypePassByValue | DIFlagNonTrivial, elements: !44, identifier: "_ZTS1a")
!44 = !{!45}
!45 = !DISubprogram(name: "a", scope: !43, file: !3, line: 3, type: !46, scopeLine: 3, flags: DIFlagPublic | DIFlagPrototyped, spFlags: DISPFlagOptimized)
!46 = !DISubroutineType(types: !47)
!47 = !{null, !48, !11, !49}
!48 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !43, size: 64, flags: DIFlagArtificial | DIFlagObjectPointer)
!49 = !DIDerivedType(tag: DW_TAG_reference_type, baseType: !8, size: 64)
!50 = !{!41, !51, !52}
!51 = !DILocalVariable(arg: 2, scope: !42, file: !3, line: 3, type: !11)
!52 = !DILocalVariable(arg: 3, scope: !42, file: !3, line: 3, type: !49)
!53 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !43, size: 64)
!54 = distinct !DIAssignID()
!55 = !DILocation(line: 0, scope: !42, inlinedAt: !56)
!56 = distinct !DILocation(line: 13, column: 3, scope: !16)
!57 = distinct !DIAssignID()
!58 = distinct !DIAssignID()
!59 = distinct !DIAssignID()
!60 = distinct !DIAssignID()
!61 = distinct !DIAssignID()
!62 = !DILocation(line: 14, column: 1, scope: !16)
!63 = distinct !DIAssignID()
!64 = !DILocation(line: 0, scope: !42)
!65 = distinct !DIAssignID()
!66 = distinct !DIAssignID()
!67 = distinct !DIAssignID()
!68 = distinct !DIAssignID()
!69 = distinct !DIAssignID()
!70 = !DILocation(line: 3, column: 20, scope: !42)
!1000 = !{i32 7, !"debug-info-assignment-tracking", i1 true}
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