; LLVM IR from Tunghohin/Competitive_Coding :: Codeforces/cf1682_B.ll (Z5solvev)

; 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::basic_istream" = type { ptr, i64, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }
%"class.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }

@a = external dso_local global [200010 x i32], align 16
@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8

; Function Attrs: mustprogress uwtable
define dso_local void @_Z5solvev() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #4
  %5 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %1)
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #4
  store i32 1, ptr %2, align 4, !tbaa !5
  br label %6

6:                                                ; preds = %16, %0
  %7 = load i32, ptr %2, align 4, !tbaa !5
  %8 = load i32, ptr %1, align 4, !tbaa !5
  %9 = icmp sle i32 %7, %8
  br i1 %9, label %11, label %10

10:                                               ; preds = %6
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #4
  br label %19

11:                                               ; preds = %6
  %12 = load i32, ptr %2, align 4, !tbaa !5
  %13 = sext i32 %12 to i64
  %14 = getelementptr inbounds [200010 x i32], ptr @a, i64 0, i64 %13
  %15 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %14)
  br label %16

16:                                               ; preds = %11
  %17 = load i32, ptr %2, align 4, !tbaa !5
  %18 = add nsw i32 %17, 1
  store i32 %18, ptr %2, align 4, !tbaa !5
  br label %6, !llvm.loop !9

19:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #4
  store i32 1073741823, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #4
  store i32 1, ptr %4, align 4, !tbaa !5
  br label %20

20:                                               ; preds = %41, %19
  %21 = load i32, ptr %4, align 4, !tbaa !5
  %22 = load i32, ptr %1, align 4, !tbaa !5
  %23 = icmp sle i32 %21, %22
  br i1 %23, label %25, label %24

24:                                               ; preds = %20
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #4
  br label %44

25:                                               ; preds = %20
  %26 = load i32, ptr %4, align 4, !tbaa !5
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds [200010 x i32], ptr @a, i64 0, i64 %27
  %29 = load i32, ptr %28, align 4, !tbaa !5
  %30 = load i32, ptr %4, align 4, !tbaa !5
  %31 = sub nsw i32 %30, 1
  %32 = icmp ne i32 %29, %31
  br i1 %32, label %33, label %40

33:                                               ; preds = %25
  %34 = load i32, ptr %4, align 4, !tbaa !5
  %35 = sext i32 %34 to i64
  %36 = getelementptr inbounds [200010 x i32], ptr @a, i64 0, i64 %35
  %37 = load i32, ptr %36, align 4, !tbaa !5
  %38 = load i32, ptr %3, align 4, !tbaa !5
  %39 = and i32 %38, %37
  store i32 %39, ptr %3, align 4, !tbaa !5
  br label %40

40:                                               ; preds = %33, %25
  br label %41

41:                                               ; preds = %40
  %42 = load i32, ptr %4, align 4, !tbaa !5
  %43 = add nsw i32 %42, 1
  store i32 %43, ptr %4, align 4, !tbaa !5
  br label %20, !llvm.loop !11

44:                                               ; preds = %24
  %45 = load i32, ptr %3, align 4, !tbaa !5
  %46 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %45)
  %47 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_c(ptr noundef nonnull align 8 dereferenceable(8) %46, i8 noundef signext 10)
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #4
  ret void
}

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

declare noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 4 dereferenceable(4)) #2

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

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_c(ptr noundef nonnull align 8 dereferenceable(8), i8 noundef signext) #3

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) #2

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 = { "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 = { inlinehint 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 #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 = !{!"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}


; 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::basic_istream" = type { ptr, i64, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }
%"class.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }

@a = external dso_local global [200010 x i32], align 16
@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8

; Function Attrs: mustprogress uwtable
define dso_local void @_Z5solvev() local_unnamed_addr #0 {
  %1 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #5
  %2 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %1)
  %3 = load i32, ptr %1, align 4, !tbaa !5
  %.not15 = icmp slt i32 %3, 1
  br i1 %.not15, label %._crit_edge, label %.lr.ph

.preheader:                                       ; preds = %.lr.ph
  %.not1317 = icmp slt i32 %22, 1
  br i1 %.not1317, label %._crit_edge, label %.lr.ph20.preheader

.lr.ph20.preheader:                               ; preds = %.preheader
  %4 = add nuw i32 %22, 1
  %wide.trip.count = zext i32 %4 to i64
  %5 = zext nneg i32 %22 to i64
  %min.iters.check = icmp ult i32 %22, 8
  br i1 %min.iters.check, label %.lr.ph20.preheader32, label %vector.ph

.lr.ph20.preheader32:                             ; preds = %middle.block, %.lr.ph20.preheader
  %indvars.iv24.ph = phi i64 [ 1, %.lr.ph20.preheader ], [ %ind.end, %middle.block ]
  %.01018.ph = phi i32 [ 1073741823, %.lr.ph20.preheader ], [ %19, %middle.block ]
  br label %.lr.ph20

vector.ph:                                        ; preds = %.lr.ph20.preheader
  %n.vec = and i64 %5, 2147483640
  %ind.end = or disjoint i64 %n.vec, 1
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %vec.ind = phi <4 x i64> [ <i64 1, i64 2, i64 3, i64 4>, %vector.ph ], [ %vec.ind.next, %vector.body ]
  %vec.phi = phi <4 x i32> [ <i32 1073741823, i32 -1, i32 -1, i32 -1>, %vector.ph ], [ %16, %vector.body ]
  %vec.phi30 = phi <4 x i32> [ <i32 -1, i32 -1, i32 -1, i32 -1>, %vector.ph ], [ %17, %vector.body ]
  %offset.idx = or disjoint i64 %index, 1
  %6 = getelementptr inbounds [200010 x i32], ptr @a, i64 0, i64 %offset.idx
  %7 = getelementptr inbounds i8, ptr %6, i64 16
  %wide.load = load <4 x i32>, ptr %6, align 4, !tbaa !5
  %wide.load31 = load <4 x i32>, ptr %7, align 4, !tbaa !5
  %8 = add nsw <4 x i64> %vec.ind, <i64 -1, i64 -1, i64 -1, i64 -1>
  %9 = add <4 x i64> %vec.ind, <i64 3, i64 3, i64 3, i64 3>
  %10 = zext <4 x i32> %wide.load to <4 x i64>
  %11 = zext <4 x i32> %wide.load31 to <4 x i64>
  %12 = icmp eq <4 x i64> %8, %10
  %13 = icmp eq <4 x i64> %9, %11
  %14 = select <4 x i1> %12, <4 x i32> <i32 -1, i32 -1, i32 -1, i32 -1>, <4 x i32> %wide.load
  %15 = select <4 x i1> %13, <4 x i32> <i32 -1, i32 -1, i32 -1, i32 -1>, <4 x i32> %wide.load31
  %16 = and <4 x i32> %14, %vec.phi
  %17 = and <4 x i32> %15, %vec.phi30
  %index.next = add nuw i64 %index, 8
  %vec.ind.next = add <4 x i64> %vec.ind, <i64 8, i64 8, i64 8, i64 8>
  %18 = icmp eq i64 %index.next, %n.vec
  br i1 %18, label %middle.block, label %vector.body, !llvm.loop !9

middle.block:                                     ; preds = %vector.body
  %bin.rdx = and <4 x i32> %17, %16
  %19 = call i32 @llvm.vector.reduce.and.v4i32(<4 x i32> %bin.rdx)
  %cmp.n = icmp eq i64 %n.vec, %5
  br i1 %cmp.n, label %._crit_edge, label %.lr.ph20.preheader32

.lr.ph:                                           ; preds = %0, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 1, %0 ]
  %20 = getelementptr inbounds [200010 x i32], ptr @a, i64 0, i64 %indvars.iv
  %21 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %20)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %22 = load i32, ptr %1, align 4, !tbaa !5
  %23 = sext i32 %22 to i64
  %.not.not = icmp slt i64 %indvars.iv, %23
  br i1 %.not.not, label %.lr.ph, label %.preheader, !llvm.loop !13

._crit_edge:                                      ; preds = %.lr.ph20, %middle.block, %0, %.preheader
  %.010.lcssa = phi i32 [ 1073741823, %.preheader ], [ 1073741823, %0 ], [ %19, %middle.block ], [ %spec.select, %.lr.ph20 ]
  %24 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %.010.lcssa)
  %25 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_c(ptr noundef nonnull align 8 dereferenceable(8) %24, i8 noundef signext 10)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #5
  ret void

.lr.ph20:                                         ; preds = %.lr.ph20.preheader32, %.lr.ph20
  %indvars.iv24 = phi i64 [ %indvars.iv.next25, %.lr.ph20 ], [ %indvars.iv24.ph, %.lr.ph20.preheader32 ]
  %.01018 = phi i32 [ %spec.select, %.lr.ph20 ], [ %.01018.ph, %.lr.ph20.preheader32 ]
  %26 = getelementptr inbounds [200010 x i32], ptr @a, i64 0, i64 %indvars.iv24
  %27 = load i32, ptr %26, align 4, !tbaa !5
  %28 = add nsw i64 %indvars.iv24, -1
  %29 = zext i32 %27 to i64
  %.not14 = icmp eq i64 %28, %29
  %30 = select i1 %.not14, i32 -1, i32 %27
  %spec.select = and i32 %30, %.01018
  %indvars.iv.next25 = add nuw nsw i64 %indvars.iv24, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next25, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph20, !llvm.loop !14
}

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

declare noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #2

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

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_c(ptr noundef nonnull align 8 dereferenceable(8), i8 noundef signext) local_unnamed_addr #3

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) local_unnamed_addr #2

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.vector.reduce.and.v4i32(<4 x i32>) #4

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 = { "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 = { inlinehint 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 #4 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
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, !12}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!"llvm.loop.isvectorized", i32 1}
!12 = !{!"llvm.loop.unroll.runtime.disable"}
!13 = distinct !{!13, !10}
!14 = distinct !{!14, !10, !12, !11}


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