; LLVM IR from ADJA/algos :: Graphs (BipartiteMatchingKuhn)

; 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"

%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" = type { ptr, ptr, ptr }

@n = external dso_local global i32, align 4
@m = external dso_local global i32, align 4
@g = external dso_local global [105 x %"class.std::vector"], align 16
@used = external dso_local global [105 x i8], align 16
@ans = external dso_local global i32, align 4
@.str = external hidden unnamed_addr constant [6 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [4 x i8], align 1

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_Z4kuhni(i32 noundef) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #2 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  %7 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef @n, ptr noundef @m)
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #5
  store i32 1, ptr %2, align 4, !tbaa !5
  br label %8

8:                                                ; preds = %32, %0
  %9 = load i32, ptr %2, align 4, !tbaa !5
  %10 = load i32, ptr @n, align 4, !tbaa !5
  %11 = icmp sle i32 %9, %10
  br i1 %11, label %13, label %12

12:                                               ; preds = %8
  store i32 2, ptr %3, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #5
  br label %35

13:                                               ; preds = %8
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #5
  store i32 1, ptr %4, align 4, !tbaa !5
  br label %14

14:                                               ; preds = %28, %13
  %15 = load i32, ptr %4, align 4, !tbaa !5
  %16 = load i32, ptr @m, align 4, !tbaa !5
  %17 = icmp sle i32 %15, %16
  br i1 %17, label %19, label %18

18:                                               ; preds = %14
  store i32 5, ptr %3, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #5
  br label %31

19:                                               ; preds = %14
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #5
  %20 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.2, ptr noundef %5)
  %21 = load i32, ptr %5, align 4, !tbaa !5
  %22 = icmp ne i32 %21, 0
  br i1 %22, label %23, label %27

23:                                               ; preds = %19
  %24 = load i32, ptr %2, align 4, !tbaa !5
  %25 = sext i32 %24 to i64
  %26 = getelementptr inbounds [105 x %"class.std::vector"], ptr @g, i64 0, i64 %25
  call void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24) %26, ptr noundef nonnull align 4 dereferenceable(4) %4)
  br label %27

27:                                               ; preds = %23, %19
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #5
  br label %28

28:                                               ; preds = %27
  %29 = load i32, ptr %4, align 4, !tbaa !5
  %30 = add nsw i32 %29, 1
  store i32 %30, ptr %4, align 4, !tbaa !5
  br label %14, !llvm.loop !9

31:                                               ; preds = %18
  br label %32

32:                                               ; preds = %31
  %33 = load i32, ptr %2, align 4, !tbaa !5
  %34 = add nsw i32 %33, 1
  store i32 %34, ptr %2, align 4, !tbaa !5
  br label %8, !llvm.loop !11

35:                                               ; preds = %12
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #5
  store i32 1, ptr %6, align 4, !tbaa !5
  br label %36

36:                                               ; preds = %48, %35
  %37 = load i32, ptr %6, align 4, !tbaa !5
  %38 = load i32, ptr @n, align 4, !tbaa !5
  %39 = icmp sle i32 %37, %38
  br i1 %39, label %41, label %40

40:                                               ; preds = %36
  store i32 8, ptr %3, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #5
  br label %51

41:                                               ; preds = %36
  call void @llvm.memset.p0.i64(ptr align 16 @used, i8 0, i64 105, i1 false)
  %42 = load i32, ptr %6, align 4, !tbaa !5
  %43 = call noundef zeroext i1 @_Z4kuhni(i32 noundef %42)
  br i1 %43, label %44, label %47

44:                                               ; preds = %41
  %45 = load i32, ptr @ans, align 4, !tbaa !5
  %46 = add nsw i32 %45, 1
  store i32 %46, ptr @ans, align 4, !tbaa !5
  br label %47

47:                                               ; preds = %44, %41
  br label %48

48:                                               ; preds = %47
  %49 = load i32, ptr %6, align 4, !tbaa !5
  %50 = add nsw i32 %49, 1
  store i32 %50, ptr %6, align 4, !tbaa !5
  br label %36, !llvm.loop !12

51:                                               ; preds = %40
  %52 = load i32, ptr @ans, align 4, !tbaa !5
  %53 = call i32 (ptr, ...) @printf(ptr noundef @.str.3, i32 noundef %52)
  ret i32 0
}

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

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 4 dereferenceable(4)) #0 align 2

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #4

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

attributes #0 = { 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}
!12 = distinct !{!12, !10}


; 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"

%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" = type { ptr, ptr, ptr }

@n = external dso_local global i32, align 4
@m = external dso_local global i32, align 4
@g = external dso_local global [105 x %"class.std::vector"], align 16
@used = external dso_local local_unnamed_addr global [105 x i8], align 16
@ans = external dso_local local_unnamed_addr global i32, align 4
@.str = external hidden unnamed_addr constant [6 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [4 x i8], align 1

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_Z4kuhni(i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #2 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull @n, ptr noundef nonnull @m)
  %4 = load i32, ptr @n, align 4, !tbaa !5
  %.not11 = icmp slt i32 %4, 1
  br i1 %.not11, label %._crit_edge18, label %.lr.ph14

.lr.ph14:                                         ; preds = %0
  %5 = load i32, ptr @m, align 4, !tbaa !5
  %6 = icmp slt i32 %5, 1
  br i1 %6, label %.lr.ph17.preheader, label %.lr.ph14.split

.preheader.loopexit:                              ; preds = %._crit_edge
  %7 = icmp slt i32 %11, 1
  br i1 %7, label %._crit_edge18, label %.lr.ph17.preheader

.lr.ph17.preheader:                               ; preds = %.lr.ph14, %.preheader.loopexit
  br label %.lr.ph17

.lr.ph14.split:                                   ; preds = %.lr.ph14, %._crit_edge
  %8 = phi i32 [ %11, %._crit_edge ], [ %4, %.lr.ph14 ]
  %9 = phi i32 [ %12, %._crit_edge ], [ %5, %.lr.ph14 ]
  %indvars.iv = phi i64 [ %indvars.iv.next, %._crit_edge ], [ 1, %.lr.ph14 ]
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #5
  store i32 1, ptr %1, align 4, !tbaa !5
  %.not810 = icmp slt i32 %9, 1
  br i1 %.not810, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph14.split
  %10 = getelementptr inbounds [105 x %"class.std::vector"], ptr @g, i64 0, i64 %indvars.iv
  br label %14

._crit_edge.loopexit:                             ; preds = %18
  %.pre = load i32, ptr @n, align 4, !tbaa !5
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %.lr.ph14.split
  %11 = phi i32 [ %.pre, %._crit_edge.loopexit ], [ %8, %.lr.ph14.split ]
  %12 = phi i32 [ %21, %._crit_edge.loopexit ], [ %9, %.lr.ph14.split ]
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #5
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %13 = sext i32 %11 to i64
  %.not.not = icmp slt i64 %indvars.iv, %13
  br i1 %.not.not, label %.lr.ph14.split, label %.preheader.loopexit, !llvm.loop !9

14:                                               ; preds = %.lr.ph, %18
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #5
  %15 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.2, ptr noundef nonnull %2)
  %16 = load i32, ptr %2, align 4, !tbaa !5
  %.not9 = icmp eq i32 %16, 0
  br i1 %.not9, label %18, label %17

17:                                               ; preds = %14
  call void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24) %10, ptr noundef nonnull align 4 dereferenceable(4) %1)
  br label %18

18:                                               ; preds = %17, %14
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #5
  %19 = load i32, ptr %1, align 4, !tbaa !5
  %20 = add nsw i32 %19, 1
  store i32 %20, ptr %1, align 4, !tbaa !5
  %21 = load i32, ptr @m, align 4, !tbaa !5
  %.not8.not = icmp slt i32 %19, %21
  br i1 %.not8.not, label %14, label %._crit_edge.loopexit, !llvm.loop !12

._crit_edge18:                                    ; preds = %28, %0, %.preheader.loopexit
  %22 = load i32, ptr @ans, align 4, !tbaa !5
  %23 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.3, i32 noundef %22)
  ret i32 0

.lr.ph17:                                         ; preds = %.lr.ph17.preheader, %28
  %.016 = phi i32 [ %29, %28 ], [ 1, %.lr.ph17.preheader ]
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(105) @used, i8 0, i64 105, i1 false)
  %24 = call noundef zeroext i1 @_Z4kuhni(i32 noundef %.016)
  br i1 %24, label %25, label %28

25:                                               ; preds = %.lr.ph17
  %26 = load i32, ptr @ans, align 4, !tbaa !5
  %27 = add nsw i32 %26, 1
  store i32 %27, ptr @ans, align 4, !tbaa !5
  br label %28

28:                                               ; preds = %.lr.ph17, %25
  %29 = add nuw nsw i32 %.016, 1
  %30 = load i32, ptr @n, align 4, !tbaa !5
  %.not7.not = icmp slt i32 %.016, %30
  br i1 %.not7.not, label %.lr.ph17, label %._crit_edge18, !llvm.loop !13
}

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

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #4

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

attributes #0 = { 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 #1 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #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 nocallback nofree nounwind willreturn memory(argmem: write) }
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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10, !11}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!"llvm.loop.unswitch.partial.disable"}
!12 = distinct !{!12, !10}
!13 = distinct !{!13, !10}


; Effective O3 passes: CorrelatedValuePropagationPass,DSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyCFGPass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimpleLoopUnswitchPass,SimplifyCFGPass,TailCallElimPass