; LLVM IR from Muhammad-Magdi/problem-solving :: Backtracking (Backtracking - Suduku2)

; Unoptimized IR (clang -disable-llvm-passes):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

%"struct.std::pair" = type { i32, i32 }

@grid = external dso_local global [10 x [10 x i8]], align 16
@ops = external dso_local global i32, align 4
@.str.4 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [3 x i8], align 1
@stdin = external global ptr, align 8
@.str.6 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.7 = external hidden unnamed_addr constant [8 x i8], align 1
@.str.8 = external hidden unnamed_addr constant [4 x i8], align 1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt4pairIiiEC2IiiTnNSt9enable_ifIXaaclsr5_PCCPE22_MoveConstructiblePairIT_T0_EEclsr5_PCCPE30_ImplicitlyMoveConvertiblePairIS3_S4_EEEbE4typeELb1EEEOS3_OS4_(ptr noundef nonnull align 4 dereferenceable(8), ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) unnamed_addr #1 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_Z5solveSt4pairIiiE(i64) #2

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z9printGridv() #2

declare i32 @printf(ptr noundef, ...) #3

declare i32 @puts(ptr noundef) #3

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #4 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca %"struct.std::pair", align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  %6 = load ptr, ptr @stdin, align 8, !tbaa !5
  %7 = call ptr @freopen(ptr noundef @.str.4, ptr noundef @.str.5, ptr noundef %6)
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #5
  store i32 0, ptr %2, align 4, !tbaa !9
  br label %8

8:                                                ; preds = %18, %0
  %9 = load i32, ptr %2, align 4, !tbaa !9
  %10 = icmp slt i32 %9, 9
  br i1 %10, label %12, label %11

11:                                               ; preds = %8
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #5
  br label %21

12:                                               ; preds = %8
  %13 = load i32, ptr %2, align 4, !tbaa !9
  %14 = sext i32 %13 to i64
  %15 = getelementptr inbounds [10 x [10 x i8]], ptr @grid, i64 0, i64 %14
  %16 = getelementptr inbounds [10 x i8], ptr %15, i64 0, i64 0
  %17 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.6, ptr noundef %16)
  br label %18

18:                                               ; preds = %12
  %19 = load i32, ptr %2, align 4, !tbaa !9
  %20 = add nsw i32 %19, 1
  store i32 %20, ptr %2, align 4, !tbaa !9
  br label %8, !llvm.loop !11

21:                                               ; preds = %11
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #5
  store i32 0, ptr %4, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #5
  store i32 0, ptr %5, align 4, !tbaa !9
  call void @_ZNSt4pairIiiEC2IiiTnNSt9enable_ifIXaaclsr5_PCCPE22_MoveConstructiblePairIT_T0_EEclsr5_PCCPE30_ImplicitlyMoveConvertiblePairIS3_S4_EEEbE4typeELb1EEEOS3_OS4_(ptr noundef nonnull align 4 dereferenceable(8) %3, ptr noundef nonnull align 4 dereferenceable(4) %4, ptr noundef nonnull align 4 dereferenceable(4) %5)
  %22 = load i64, ptr %3, align 4
  %23 = call noundef zeroext i1 @_Z5solveSt4pairIiiE(i64 %22)
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #5
  br i1 %23, label %24, label %25

24:                                               ; preds = %21
  call void @_Z9printGridv()
  br label %27

25:                                               ; preds = %21
  %26 = call i32 @puts(ptr noundef @.str.7)
  br label %27

27:                                               ; preds = %25, %24
  %28 = load i32, ptr @ops, align 4, !tbaa !9
  %29 = call i32 (ptr, ...) @printf(ptr noundef @.str.8, i32 noundef %28)
  ret i32 0
}

declare ptr @freopen(ptr noundef, ptr noundef, ptr noundef) #3

declare i32 @__isoc99_scanf(ptr noundef, ...) #3

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #2 = { mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #3 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #4 = { mustprogress norecurse uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #5 = { nounwind }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; Optimized IR (opt -passes='default<O3>'):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

%"struct.std::pair" = type { i32, i32 }

@grid = external dso_local global [10 x [10 x i8]], align 16
@ops = external dso_local local_unnamed_addr global i32, align 4
@.str.4 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [3 x i8], align 1
@stdin = external local_unnamed_addr global ptr, align 8
@.str.6 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.7 = external hidden unnamed_addr constant [8 x i8], align 1
@.str.8 = external hidden unnamed_addr constant [4 x i8], align 1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt4pairIiiEC2IiiTnNSt9enable_ifIXaaclsr5_PCCPE22_MoveConstructiblePairIT_T0_EEclsr5_PCCPE30_ImplicitlyMoveConvertiblePairIS3_S4_EEEbE4typeELb1EEEOS3_OS4_(ptr noundef nonnull align 4 dereferenceable(8), ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) unnamed_addr #1 align 2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_Z5solveSt4pairIiiE(i64) local_unnamed_addr #2

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z9printGridv() local_unnamed_addr #2

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #3

; Function Attrs: nofree nounwind
declare noundef i32 @puts(ptr nocapture noundef readonly) local_unnamed_addr #3

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #4 {
  %1 = alloca %"struct.std::pair", align 8
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = load ptr, ptr @stdin, align 8, !tbaa !5
  %5 = tail call ptr @freopen(ptr noundef nonnull @.str.4, ptr noundef nonnull @.str.5, ptr noundef %4)
  %6 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.6, ptr noundef nonnull @grid)
  %7 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.6, ptr noundef nonnull getelementptr inbounds (i8, ptr @grid, i64 10))
  %8 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.6, ptr noundef nonnull getelementptr inbounds (i8, ptr @grid, i64 20))
  %9 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.6, ptr noundef nonnull getelementptr inbounds (i8, ptr @grid, i64 30))
  %10 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.6, ptr noundef nonnull getelementptr inbounds (i8, ptr @grid, i64 40))
  %11 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.6, ptr noundef nonnull getelementptr inbounds (i8, ptr @grid, i64 50))
  %12 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.6, ptr noundef nonnull getelementptr inbounds (i8, ptr @grid, i64 60))
  %13 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.6, ptr noundef nonnull getelementptr inbounds (i8, ptr @grid, i64 70))
  %14 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.6, ptr noundef nonnull getelementptr inbounds (i8, ptr @grid, i64 80))
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #6
  store i32 0, ptr %2, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #6
  store i32 0, ptr %3, align 4, !tbaa !9
  call void @_ZNSt4pairIiiEC2IiiTnNSt9enable_ifIXaaclsr5_PCCPE22_MoveConstructiblePairIT_T0_EEclsr5_PCCPE30_ImplicitlyMoveConvertiblePairIS3_S4_EEEbE4typeELb1EEEOS3_OS4_(ptr noundef nonnull align 4 dereferenceable(8) %1, ptr noundef nonnull align 4 dereferenceable(4) %2, ptr noundef nonnull align 4 dereferenceable(4) %3)
  %15 = load i64, ptr %1, align 8
  %16 = call noundef zeroext i1 @_Z5solveSt4pairIiiE(i64 %15)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #6
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #6
  br i1 %16, label %17, label %18

17:                                               ; preds = %0
  call void @_Z9printGridv()
  br label %20

18:                                               ; preds = %0
  %19 = call i32 @puts(ptr noundef nonnull dereferenceable(1) @.str.7)
  br label %20

20:                                               ; preds = %18, %17
  %21 = load i32, ptr @ops, align 4, !tbaa !9
  %22 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.8, i32 noundef %21)
  ret i32 0
}

declare ptr @freopen(ptr noundef, ptr noundef, ptr noundef) local_unnamed_addr #5

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #3

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #2 = { mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #3 = { nofree nounwind "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #4 = { mustprogress norecurse uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #5 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #6 = { nounwind }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,LoopRotatePass,SROAPass,SimplifyCFGPass,TailCallElimPass