; LLVM IR from tangjz/acm-icpc :: buaa/oj3rd (765)

; 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"

@n = external dso_local global i32, align 4
@m = external dso_local global i32, align 4
@k = external dso_local global i32, align 4
@e = external dso_local global [501 x [501 x i32]], align 16
@match = external dso_local global [501 x i32], align 16
@ans = external dso_local global i32, align 4
@vis = external dso_local global [501 x i8], align 16
@.str = external hidden unnamed_addr constant [7 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [4 x i8], align 1

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_Z3dfsi(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
  store i32 0, ptr %1, align 4
  br label %5

5:                                                ; preds = %43, %0
  %6 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef @n, ptr noundef @m, ptr noundef @k)
  %7 = icmp eq i32 %6, 3
  br i1 %7, label %8, label %46

8:                                                ; preds = %5
  store i32 0, ptr @ans, align 4, !tbaa !5
  call void @llvm.memset.p0.i64(ptr align 16 @e, i8 0, i64 1004004, i1 false)
  call void @llvm.memset.p0.i64(ptr align 16 @match, i8 0, i64 2004, i1 false)
  br label %9

9:                                                ; preds = %13, %8
  %10 = load i32, ptr @k, align 4, !tbaa !5
  %11 = add nsw i32 %10, -1
  store i32 %11, ptr @k, align 4, !tbaa !5
  %12 = icmp ne i32 %10, 0
  br i1 %12, label %13, label %27

13:                                               ; preds = %9
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #5
  %14 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %2, ptr noundef %3)
  %15 = load i32, ptr %3, align 4, !tbaa !5
  %16 = load i32, ptr %2, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [501 x [501 x i32]], ptr @e, i64 0, i64 %17
  %19 = load i32, ptr %2, align 4, !tbaa !5
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds [501 x [501 x i32]], ptr @e, i64 0, i64 %20
  %22 = getelementptr inbounds [501 x i32], ptr %21, i64 0, i64 0
  %23 = load i32, ptr %22, align 4, !tbaa !5
  %24 = add nsw i32 %23, 1
  store i32 %24, ptr %22, align 4, !tbaa !5
  %25 = sext i32 %24 to i64
  %26 = getelementptr inbounds [501 x i32], ptr %18, i64 0, i64 %25
  store i32 %15, ptr %26, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #5
  br label %9, !llvm.loop !9

27:                                               ; preds = %9
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #5
  store i32 1, ptr %4, align 4, !tbaa !5
  br label %28

28:                                               ; preds = %40, %27
  %29 = load i32, ptr %4, align 4, !tbaa !5
  %30 = load i32, ptr @n, align 4, !tbaa !5
  %31 = icmp sle i32 %29, %30
  br i1 %31, label %33, label %32

32:                                               ; preds = %28
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #5
  br label %43

33:                                               ; preds = %28
  call void @llvm.memset.p0.i64(ptr align 16 @vis, i8 0, i64 501, i1 false)
  %34 = load i32, ptr %4, align 4, !tbaa !5
  %35 = call noundef zeroext i1 @_Z3dfsi(i32 noundef %34)
  br i1 %35, label %36, label %39

36:                                               ; preds = %33
  %37 = load i32, ptr @ans, align 4, !tbaa !5
  %38 = add nsw i32 %37, 1
  store i32 %38, ptr @ans, align 4, !tbaa !5
  br label %39

39:                                               ; preds = %36, %33
  br label %40

40:                                               ; preds = %39
  %41 = load i32, ptr %4, align 4, !tbaa !5
  %42 = add nsw i32 %41, 1
  store i32 %42, ptr %4, align 4, !tbaa !5
  br label %28, !llvm.loop !11

43:                                               ; preds = %32
  %44 = load i32, ptr @ans, align 4, !tbaa !5
  %45 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i32 noundef %44)
  br label %5, !llvm.loop !12

46:                                               ; preds = %5
  ret i32 0
}

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

; 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"

@n = external dso_local global i32, align 4
@m = external dso_local global i32, align 4
@k = external dso_local global i32, align 4
@e = external dso_local local_unnamed_addr global [501 x [501 x i32]], align 16
@match = external dso_local local_unnamed_addr global [501 x i32], align 16
@ans = external dso_local local_unnamed_addr global i32, align 4
@vis = external dso_local local_unnamed_addr global [501 x i8], align 16
@.str = external hidden unnamed_addr constant [7 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [4 x i8], align 1

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_Z3dfsi(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, ptr noundef nonnull @k)
  %4 = icmp eq i32 %3, 3
  br i1 %4, label %.lr.ph9, label %._crit_edge10

.lr.ph9:                                          ; preds = %0, %._crit_edge
  store i32 0, ptr @ans, align 4, !tbaa !5
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(1004004) @e, i8 0, i64 1004004, i1 false)
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(2004) @match, i8 0, i64 2004, i1 false)
  %5 = load i32, ptr @k, align 4, !tbaa !5
  %6 = add nsw i32 %5, -1
  store i32 %6, ptr @k, align 4, !tbaa !5
  %.not4 = icmp eq i32 %5, 0
  br i1 %.not4, label %.preheader, label %.lr.ph

.preheader:                                       ; preds = %.lr.ph, %.lr.ph9
  %7 = load i32, ptr @n, align 4, !tbaa !5
  %.not35 = icmp slt i32 %7, 1
  br i1 %.not35, label %._crit_edge, label %.lr.ph7

.lr.ph:                                           ; preds = %.lr.ph9, %.lr.ph
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #5
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #5
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %1, ptr noundef nonnull %2)
  %9 = load i32, ptr %2, align 4, !tbaa !5
  %10 = load i32, ptr %1, align 4, !tbaa !5
  %11 = sext i32 %10 to i64
  %12 = getelementptr inbounds [501 x [501 x i32]], ptr @e, i64 0, i64 %11
  %13 = load i32, ptr %12, align 4, !tbaa !5
  %14 = add nsw i32 %13, 1
  store i32 %14, ptr %12, align 4, !tbaa !5
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds [501 x [501 x i32]], ptr @e, i64 0, i64 %11, i64 %15
  store i32 %9, ptr %16, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #5
  %17 = load i32, ptr @k, align 4, !tbaa !5
  %18 = add nsw i32 %17, -1
  store i32 %18, ptr @k, align 4, !tbaa !5
  %.not = icmp eq i32 %17, 0
  br i1 %.not, label %.preheader, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %27, %.preheader
  %19 = load i32, ptr @ans, align 4, !tbaa !5
  %20 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i32 noundef %19)
  %21 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull @n, ptr noundef nonnull @m, ptr noundef nonnull @k)
  %22 = icmp eq i32 %21, 3
  br i1 %22, label %.lr.ph9, label %._crit_edge10, !llvm.loop !11

.lr.ph7:                                          ; preds = %.preheader, %27
  %.06 = phi i32 [ %28, %27 ], [ 1, %.preheader ]
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(501) @vis, i8 0, i64 501, i1 false)
  %23 = call noundef zeroext i1 @_Z3dfsi(i32 noundef %.06)
  br i1 %23, label %24, label %27

24:                                               ; preds = %.lr.ph7
  %25 = load i32, ptr @ans, align 4, !tbaa !5
  %26 = add nsw i32 %25, 1
  store i32 %26, ptr @ans, align 4, !tbaa !5
  br label %27

27:                                               ; preds = %.lr.ph7, %24
  %28 = add nuw nsw i32 %.06, 1
  %29 = load i32, ptr @n, align 4, !tbaa !5
  %.not3.not = icmp slt i32 %.06, %29
  br i1 %.not3.not, label %.lr.ph7, label %._crit_edge, !llvm.loop !12

._crit_edge10:                                    ; preds = %._crit_edge, %0
  ret i32 0
}

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

; 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}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}
!12 = distinct !{!12, !10}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass