; LLVM IR from DionysiosB/CodeForces :: 0300-0399 (363B-Fence)

; 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 [8 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [5 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 ptr, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i32, align 4
  %8 = alloca i64, align 8
  %9 = alloca i64, align 8
  %10 = alloca i64, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #5
  store i64 0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #5
  store i64 0, ptr %3, align 8, !tbaa !5
  %11 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2, ptr noundef %3)
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #5
  %12 = load i64, ptr %2, align 8, !tbaa !5
  %13 = call { i64, i1 } @llvm.umul.with.overflow.i64(i64 %12, i64 8)
  %14 = extractvalue { i64, i1 } %13, 1
  %15 = extractvalue { i64, i1 } %13, 0
  %16 = select i1 %14, i64 -1, i64 %15
  %17 = call noalias noundef nonnull ptr @_Znam(i64 noundef %16) #6
  store ptr %17, ptr %4, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #5
  store i64 0, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #5
  store i64 0, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #5
  store i32 0, ptr %7, align 4, !tbaa !11
  br label %18

18:                                               ; preds = %38, %0
  %19 = load i32, ptr %7, align 4, !tbaa !11
  %20 = sext i32 %19 to i64
  %21 = load i64, ptr %2, align 8, !tbaa !5
  %22 = icmp slt i64 %20, %21
  br i1 %22, label %24, label %23

23:                                               ; preds = %18
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #5
  br label %41

24:                                               ; preds = %18
  %25 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %5)
  %26 = load i64, ptr %6, align 8, !tbaa !5
  %27 = load i64, ptr %5, align 8, !tbaa !5
  %28 = add nsw i64 %26, %27
  %29 = load ptr, ptr %4, align 8, !tbaa !9
  %30 = load i32, ptr %7, align 4, !tbaa !11
  %31 = sext i32 %30 to i64
  %32 = getelementptr inbounds i64, ptr %29, i64 %31
  store i64 %28, ptr %32, align 8, !tbaa !5
  %33 = load ptr, ptr %4, align 8, !tbaa !9
  %34 = load i32, ptr %7, align 4, !tbaa !11
  %35 = sext i32 %34 to i64
  %36 = getelementptr inbounds i64, ptr %33, i64 %35
  %37 = load i64, ptr %36, align 8, !tbaa !5
  store i64 %37, ptr %6, align 8, !tbaa !5
  br label %38

38:                                               ; preds = %24
  %39 = load i32, ptr %7, align 4, !tbaa !11
  %40 = add nsw i32 %39, 1
  store i32 %40, ptr %7, align 4, !tbaa !11
  br label %18, !llvm.loop !13

41:                                               ; preds = %23
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #5
  %42 = load ptr, ptr %4, align 8, !tbaa !9
  %43 = load i64, ptr %3, align 8, !tbaa !5
  %44 = sub nsw i64 %43, 1
  %45 = getelementptr inbounds i64, ptr %42, i64 %44
  %46 = load i64, ptr %45, align 8, !tbaa !5
  store i64 %46, ptr %8, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #5
  store i64 0, ptr %9, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #5
  store i64 0, ptr %10, align 8, !tbaa !5
  br label %47

47:                                               ; preds = %74, %41
  %48 = load i64, ptr %10, align 8, !tbaa !5
  %49 = load i64, ptr %2, align 8, !tbaa !5
  %50 = load i64, ptr %3, align 8, !tbaa !5
  %51 = sub nsw i64 %49, %50
  %52 = icmp slt i64 %48, %51
  br i1 %52, label %54, label %53

53:                                               ; preds = %47
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #5
  br label %77

54:                                               ; preds = %47
  %55 = load ptr, ptr %4, align 8, !tbaa !9
  %56 = load i64, ptr %10, align 8, !tbaa !5
  %57 = load i64, ptr %3, align 8, !tbaa !5
  %58 = add nsw i64 %56, %57
  %59 = getelementptr inbounds i64, ptr %55, i64 %58
  %60 = load i64, ptr %59, align 8, !tbaa !5
  %61 = load ptr, ptr %4, align 8, !tbaa !9
  %62 = load i64, ptr %10, align 8, !tbaa !5
  %63 = getelementptr inbounds i64, ptr %61, i64 %62
  %64 = load i64, ptr %63, align 8, !tbaa !5
  %65 = sub nsw i64 %60, %64
  store i64 %65, ptr %5, align 8, !tbaa !5
  %66 = load i64, ptr %5, align 8, !tbaa !5
  %67 = load i64, ptr %8, align 8, !tbaa !5
  %68 = icmp slt i64 %66, %67
  br i1 %68, label %69, label %73

69:                                               ; preds = %54
  %70 = load i64, ptr %5, align 8, !tbaa !5
  store i64 %70, ptr %8, align 8, !tbaa !5
  %71 = load i64, ptr %10, align 8, !tbaa !5
  %72 = add nsw i64 %71, 1
  store i64 %72, ptr %9, align 8, !tbaa !5
  br label %73

73:                                               ; preds = %69, %54
  br label %74

74:                                               ; preds = %73
  %75 = load i64, ptr %10, align 8, !tbaa !5
  %76 = add nsw i64 %75, 1
  store i64 %76, ptr %10, align 8, !tbaa !5
  br label %47, !llvm.loop !15

77:                                               ; preds = %53
  %78 = load i64, ptr %9, align 8, !tbaa !5
  %79 = add nsw i64 %78, 1
  %80 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i64 noundef %79)
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #5
  ret i32 0
}

; 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 nosync nounwind speculatable willreturn memory(none)
declare { i64, i1 } @llvm.umul.with.overflow.i64(i64, i64) #3

; Function Attrs: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znam(i64 noundef) #4

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

declare i32 @printf(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 nosync nounwind speculatable willreturn memory(none) }
attributes #4 = { nobuiltin allocsize(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 }
attributes #6 = { builtin allocsize(0) }

!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 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}
!15 = distinct !{!15, !14}


; 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 [8 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [5 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca i64, align 8
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #5
  store i64 0, ptr %1, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #5
  store i64 0, ptr %2, align 8, !tbaa !5
  %4 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1, ptr noundef nonnull %2)
  %5 = load i64, ptr %1, align 8, !tbaa !5
  %6 = icmp ugt i64 %5, 2305843009213693951
  %7 = shl i64 %5, 3
  %8 = select i1 %6, i64 -1, i64 %7
  %9 = call noalias noundef nonnull ptr @_Znam(i64 noundef %8) #6
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #5
  store i64 0, ptr %3, align 8, !tbaa !5
  %10 = icmp sgt i64 %5, 0
  br i1 %10, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %0
  %.lcssa = phi i64 [ %5, %0 ], [ %22, %.lr.ph ]
  %11 = load i64, ptr %2, align 8, !tbaa !5
  %12 = sub nsw i64 %.lcssa, %11
  %13 = icmp sgt i64 %12, 0
  br i1 %13, label %.lr.ph30.preheader, label %32

.lr.ph30.preheader:                               ; preds = %._crit_edge
  %14 = getelementptr i64, ptr %9, i64 %11
  %15 = getelementptr i8, ptr %14, i64 -8
  %16 = load i64, ptr %15, align 8, !tbaa !5
  %.neg = add i64 %11, 1
  %xtraiter = and i64 %12, 1
  %17 = icmp eq i64 %.lcssa, %.neg
  br i1 %17, label %._crit_edge31.unr-lcssa, label %.lr.ph30.preheader.new

.lr.ph30.preheader.new:                           ; preds = %.lr.ph30.preheader
  %unroll_iter = and i64 %12, 9223372036854775806
  br label %.lr.ph30

.lr.ph:                                           ; preds = %0, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %0 ]
  %.02024 = phi i64 [ %20, %.lr.ph ], [ 0, %0 ]
  %18 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %3)
  %19 = load i64, ptr %3, align 8, !tbaa !5
  %20 = add nsw i64 %19, %.02024
  %21 = getelementptr inbounds i64, ptr %9, i64 %indvars.iv
  store i64 %20, ptr %21, align 8, !tbaa !5
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %22 = load i64, ptr %1, align 8, !tbaa !5
  %23 = icmp sgt i64 %22, %indvars.iv.next
  br i1 %23, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge31.unr-lcssa:                          ; preds = %.lr.ph30, %.lr.ph30.preheader
  %.lcssa41.ph = phi i64 [ poison, %.lr.ph30.preheader ], [ %45, %.lr.ph30 ]
  %spec.select23.lcssa.ph = phi i64 [ poison, %.lr.ph30.preheader ], [ %spec.select23.1, %.lr.ph30 ]
  %.028.unr = phi i64 [ 0, %.lr.ph30.preheader ], [ %47, %.lr.ph30 ]
  %.01627.unr = phi i64 [ 0, %.lr.ph30.preheader ], [ %spec.select23.1, %.lr.ph30 ]
  %.01726.unr = phi i64 [ %16, %.lr.ph30.preheader ], [ %spec.select.1, %.lr.ph30 ]
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %._crit_edge31, label %.lr.ph30.epil

.lr.ph30.epil:                                    ; preds = %._crit_edge31.unr-lcssa
  %24 = getelementptr i64, ptr %9, i64 %.028.unr
  %25 = getelementptr i64, ptr %24, i64 %11
  %26 = load i64, ptr %25, align 8, !tbaa !5
  %27 = load i64, ptr %24, align 8, !tbaa !5
  %28 = sub nsw i64 %26, %27
  %29 = icmp slt i64 %28, %.01726.unr
  %30 = add nuw nsw i64 %.028.unr, 1
  %spec.select23.epil = select i1 %29, i64 %30, i64 %.01627.unr
  br label %._crit_edge31

._crit_edge31:                                    ; preds = %._crit_edge31.unr-lcssa, %.lr.ph30.epil
  %.lcssa41 = phi i64 [ %.lcssa41.ph, %._crit_edge31.unr-lcssa ], [ %28, %.lr.ph30.epil ]
  %spec.select23.lcssa = phi i64 [ %spec.select23.lcssa.ph, %._crit_edge31.unr-lcssa ], [ %spec.select23.epil, %.lr.ph30.epil ]
  store i64 %.lcssa41, ptr %3, align 8, !tbaa !5
  %31 = add nsw i64 %spec.select23.lcssa, 1
  br label %32

32:                                               ; preds = %._crit_edge31, %._crit_edge
  %.016.lcssa = phi i64 [ %31, %._crit_edge31 ], [ 1, %._crit_edge ]
  %33 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i64 noundef %.016.lcssa)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %1) #5
  ret i32 0

.lr.ph30:                                         ; preds = %.lr.ph30, %.lr.ph30.preheader.new
  %.028 = phi i64 [ 0, %.lr.ph30.preheader.new ], [ %47, %.lr.ph30 ]
  %.01627 = phi i64 [ 0, %.lr.ph30.preheader.new ], [ %spec.select23.1, %.lr.ph30 ]
  %.01726 = phi i64 [ %16, %.lr.ph30.preheader.new ], [ %spec.select.1, %.lr.ph30 ]
  %niter = phi i64 [ 0, %.lr.ph30.preheader.new ], [ %niter.next.1, %.lr.ph30 ]
  %34 = getelementptr i64, ptr %9, i64 %.028
  %35 = getelementptr i64, ptr %34, i64 %11
  %36 = load i64, ptr %35, align 8, !tbaa !5
  %37 = load i64, ptr %34, align 8, !tbaa !5
  %38 = sub nsw i64 %36, %37
  %39 = icmp slt i64 %38, %.01726
  %40 = or disjoint i64 %.028, 1
  %spec.select = call i64 @llvm.smin.i64(i64 %38, i64 %.01726)
  %spec.select23 = select i1 %39, i64 %40, i64 %.01627
  %41 = getelementptr i64, ptr %9, i64 %40
  %42 = getelementptr i64, ptr %41, i64 %11
  %43 = load i64, ptr %42, align 8, !tbaa !5
  %44 = load i64, ptr %41, align 8, !tbaa !5
  %45 = sub nsw i64 %43, %44
  %46 = icmp slt i64 %45, %spec.select
  %47 = add nuw nsw i64 %.028, 2
  %spec.select.1 = call i64 @llvm.smin.i64(i64 %45, i64 %spec.select)
  %spec.select23.1 = select i1 %46, i64 %47, i64 %spec.select23
  %niter.next.1 = add i64 %niter, 2
  %niter.ncmp.1 = icmp eq i64 %niter.next.1, %unroll_iter
  br i1 %niter.ncmp.1, label %._crit_edge31.unr-lcssa, label %.lr.ph30, !llvm.loop !11
}

; 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: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znam(i64 noundef) local_unnamed_addr #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 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.smin.i64(i64, i64) #4

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 = { 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 = { nobuiltin allocsize(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 #4 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #5 = { nounwind }
attributes #6 = { builtin allocsize(0) }

!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}


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