; LLVM IR from seikhchilli/codeforces-solution :: 1594B.ll (Z6binaryPyy)

; 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"

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

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

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i64 @_Z6binaryPyy(ptr noundef %0, i64 noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i64 %1, ptr %4, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  store i64 0, ptr %5, align 8, !tbaa !9
  br label %6

6:                                                ; preds = %9, %2
  %7 = load i64, ptr %4, align 8, !tbaa !9
  %8 = icmp ugt i64 %7, 0
  br i1 %8, label %9, label %19

9:                                                ; preds = %6
  %10 = load i64, ptr %4, align 8, !tbaa !9
  %11 = urem i64 %10, 2
  %12 = load ptr, ptr %3, align 8, !tbaa !5
  %13 = load i64, ptr %5, align 8, !tbaa !9
  %14 = getelementptr inbounds i64, ptr %12, i64 %13
  store i64 %11, ptr %14, align 8, !tbaa !9
  %15 = load i64, ptr %4, align 8, !tbaa !9
  %16 = udiv i64 %15, 2
  store i64 %16, ptr %4, align 8, !tbaa !9
  %17 = load i64, ptr %5, align 8, !tbaa !9
  %18 = add i64 %17, 1
  store i64 %18, ptr %5, align 8, !tbaa !9
  br label %6, !llvm.loop !11

19:                                               ; preds = %6
  %20 = load i64, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  ret i64 %20
}

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 = { 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 = !{!"long long", !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"

; Function Attrs: mustprogress nofree norecurse nosync nounwind memory(argmem: write) uwtable
define dso_local noundef i64 @_Z6binaryPyy(ptr nocapture noundef writeonly %0, i64 noundef %1) local_unnamed_addr #0 {
  %.not7 = icmp eq i64 %1, 0
  br i1 %.not7, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %2
  %3 = tail call range(i64 0, 65) i64 @llvm.ctlz.i64(i64 %1, i1 true)
  %4 = sub nuw nsw i64 64, %3
  %5 = xor i64 %3, 63
  %xtraiter = and i64 %4, 3
  %6 = icmp ult i64 %5, 3
  br i1 %6, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph.preheader.new

.lr.ph.preheader.new:                             ; preds = %.lr.ph.preheader
  %unroll_iter = and i64 %4, 124
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph, %.lr.ph.preheader.new
  %.09 = phi i64 [ 0, %.lr.ph.preheader.new ], [ %22, %.lr.ph ]
  %.068 = phi i64 [ %1, %.lr.ph.preheader.new ], [ %21, %.lr.ph ]
  %niter = phi i64 [ 0, %.lr.ph.preheader.new ], [ %niter.next.3, %.lr.ph ]
  %7 = and i64 %.068, 1
  %8 = getelementptr inbounds i64, ptr %0, i64 %.09
  store i64 %7, ptr %8, align 8, !tbaa !5
  %9 = lshr i64 %.068, 1
  %10 = or disjoint i64 %.09, 1
  %11 = and i64 %9, 1
  %12 = getelementptr inbounds i64, ptr %0, i64 %10
  store i64 %11, ptr %12, align 8, !tbaa !5
  %13 = lshr i64 %.068, 2
  %14 = or disjoint i64 %.09, 2
  %15 = and i64 %13, 1
  %16 = getelementptr inbounds i64, ptr %0, i64 %14
  store i64 %15, ptr %16, align 8, !tbaa !5
  %17 = lshr i64 %.068, 3
  %18 = or disjoint i64 %.09, 3
  %19 = and i64 %17, 1
  %20 = getelementptr inbounds i64, ptr %0, i64 %18
  store i64 %19, ptr %20, align 8, !tbaa !5
  %21 = lshr i64 %.068, 4
  %22 = add nuw nsw i64 %.09, 4
  %niter.next.3 = add i64 %niter, 4
  %niter.ncmp.3 = icmp eq i64 %niter.next.3, %unroll_iter
  br i1 %niter.ncmp.3, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph, !llvm.loop !9

._crit_edge.loopexit.unr-lcssa:                   ; preds = %.lr.ph, %.lr.ph.preheader
  %.09.unr = phi i64 [ 0, %.lr.ph.preheader ], [ %22, %.lr.ph ]
  %.068.unr = phi i64 [ %1, %.lr.ph.preheader ], [ %21, %.lr.ph ]
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %._crit_edge, label %.lr.ph.epil

.lr.ph.epil:                                      ; preds = %._crit_edge.loopexit.unr-lcssa, %.lr.ph.epil
  %.09.epil = phi i64 [ %26, %.lr.ph.epil ], [ %.09.unr, %._crit_edge.loopexit.unr-lcssa ]
  %.068.epil = phi i64 [ %25, %.lr.ph.epil ], [ %.068.unr, %._crit_edge.loopexit.unr-lcssa ]
  %epil.iter = phi i64 [ %epil.iter.next, %.lr.ph.epil ], [ 0, %._crit_edge.loopexit.unr-lcssa ]
  %23 = and i64 %.068.epil, 1
  %24 = getelementptr inbounds i64, ptr %0, i64 %.09.epil
  store i64 %23, ptr %24, align 8, !tbaa !5
  %25 = lshr i64 %.068.epil, 1
  %26 = add nuw nsw i64 %.09.epil, 1
  %epil.iter.next = add i64 %epil.iter, 1
  %epil.iter.cmp.not = icmp eq i64 %epil.iter.next, %xtraiter
  br i1 %epil.iter.cmp.not, label %._crit_edge, label %.lr.ph.epil, !llvm.loop !11

._crit_edge:                                      ; preds = %._crit_edge.loopexit.unr-lcssa, %.lr.ph.epil, %2
  %.0.lcssa = phi i64 [ 0, %2 ], [ %4, %.lr.ph.epil ], [ %4, %._crit_edge.loopexit.unr-lcssa ]
  ret i64 %.0.lcssa
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.ctlz.i64(i64, i1 immarg) #1

attributes #0 = { mustprogress nofree norecurse nosync nounwind memory(argmem: write) 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 speculatable willreturn memory(none) }

!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 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, !12}
!12 = !{!"llvm.loop.unroll.disable"}


; Effective O3 passes: GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopIdiomRecognizePass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SCCPPass,SROAPass,SimplifyCFGPass,TailCallElimPass