; LLVM IR from DionysiosB/CodeForces :: 1709A-ThreeDoors (main)

; 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"

@.str = external hidden unnamed_addr constant [4 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [3 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  %4 = alloca [4 x i64], align 16
  %5 = alloca i64, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #4
  %6 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  br label %7

7:                                                ; preds = %37, %0
  %8 = load i64, ptr %2, align 8, !tbaa !5
  %9 = add nsw i64 %8, -1
  store i64 %9, ptr %2, align 8, !tbaa !5
  %10 = icmp ne i64 %8, 0
  br i1 %10, label %11, label %42

11:                                               ; preds = %7
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #4
  %12 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %3)
  call void @llvm.lifetime.start.p0(i64 32, ptr %4) #4
  call void @llvm.memset.p0.i64(ptr align 16 %4, i8 0, i64 32, i1 false)
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #4
  store i64 1, ptr %5, align 8, !tbaa !5
  br label %13

13:                                               ; preds = %22, %11
  %14 = load i64, ptr %5, align 8, !tbaa !5
  %15 = icmp slt i64 %14, 4
  br i1 %15, label %17, label %16

16:                                               ; preds = %13
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #4
  br label %25

17:                                               ; preds = %13
  %18 = getelementptr inbounds [4 x i64], ptr %4, i64 0, i64 0
  %19 = load i64, ptr %5, align 8, !tbaa !5
  %20 = getelementptr inbounds i64, ptr %18, i64 %19
  %21 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %20)
  br label %22

22:                                               ; preds = %17
  %23 = load i64, ptr %5, align 8, !tbaa !5
  %24 = add nsw i64 %23, 1
  store i64 %24, ptr %5, align 8, !tbaa !5
  br label %13, !llvm.loop !9

25:                                               ; preds = %16
  %26 = load i64, ptr %3, align 8, !tbaa !5
  %27 = getelementptr inbounds [4 x i64], ptr %4, i64 0, i64 %26
  %28 = load i64, ptr %27, align 8, !tbaa !5
  %29 = icmp ne i64 %28, 0
  br i1 %29, label %30, label %37

30:                                               ; preds = %25
  %31 = load i64, ptr %3, align 8, !tbaa !5
  %32 = getelementptr inbounds [4 x i64], ptr %4, i64 0, i64 %31
  %33 = load i64, ptr %32, align 8, !tbaa !5
  %34 = getelementptr inbounds [4 x i64], ptr %4, i64 0, i64 %33
  %35 = load i64, ptr %34, align 8, !tbaa !5
  %36 = icmp ne i64 %35, 0
  br label %37

37:                                               ; preds = %30, %25
  %38 = phi i1 [ false, %25 ], [ %36, %30 ]
  %39 = zext i1 %38 to i64
  %40 = select i1 %38, ptr @.str.1, ptr @.str.2
  %41 = call i32 @puts(ptr noundef %40)
  call void @llvm.lifetime.end.p0(i64 32, ptr %4) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #4
  br label %7, !llvm.loop !11

42:                                               ; preds = %7
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #4
  %43 = load i32, ptr %1, align 4
  ret i32 %43
}

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

declare i32 @__isoc99_scanf(ptr noundef, ...) #2

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #3

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

declare i32 @puts(ptr noundef) #2

attributes #0 = { 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { "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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #4 = { 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 = !{!"long", !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}


; 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"

@.str = external hidden unnamed_addr constant [4 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [3 x i8], align 1

; Function Attrs: mustprogress nofree norecurse nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca i64, align 8
  %2 = alloca i64, align 8
  %3 = alloca [4 x i64], align 16
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #4
  %4 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %5 = load i64, ptr %1, align 8, !tbaa !5
  %6 = add nsw i64 %5, -1
  store i64 %6, ptr %1, align 8, !tbaa !5
  %.not9 = icmp eq i64 %5, 0
  br i1 %.not9, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %0
  %7 = getelementptr inbounds i8, ptr %3, i64 8
  %8 = getelementptr inbounds i8, ptr %3, i64 16
  %9 = getelementptr inbounds i8, ptr %3, i64 24
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.thread
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #4
  %10 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %2)
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %3) #4
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(32) %3, i8 0, i64 32, i1 false)
  %11 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %7)
  %12 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %8)
  %13 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %9)
  %14 = load i64, ptr %2, align 8, !tbaa !5
  %15 = getelementptr inbounds [4 x i64], ptr %3, i64 0, i64 %14
  %16 = load i64, ptr %15, align 8, !tbaa !5
  %.not5 = icmp eq i64 %16, 0
  br i1 %.not5, label %.thread, label %17

17:                                               ; preds = %.lr.ph
  %18 = getelementptr inbounds [4 x i64], ptr %3, i64 0, i64 %16
  %19 = load i64, ptr %18, align 8, !tbaa !5
  %.fr = freeze i64 %19
  %.not7 = icmp eq i64 %.fr, 0
  %spec.select = select i1 %.not7, ptr @.str.2, ptr @.str.1
  br label %.thread

.thread:                                          ; preds = %17, %.lr.ph
  %20 = phi ptr [ @.str.2, %.lr.ph ], [ %spec.select, %17 ]
  %21 = call i32 @puts(ptr noundef nonnull dereferenceable(1) %20)
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %3) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #4
  %22 = load i64, ptr %1, align 8, !tbaa !5
  %23 = add nsw i64 %22, -1
  store i64 %23, ptr %1, align 8, !tbaa !5
  %.not = icmp eq i64 %22, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %.thread, %0
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %1) #4
  ret i32 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: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #3

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

; Function Attrs: nofree nounwind
declare noundef i32 @puts(ptr nocapture noundef readonly) local_unnamed_addr #2

attributes #0 = { mustprogress nofree norecurse 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 #1 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #3 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #4 = { 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 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass