; LLVM IR from plskz/competitive-programming :: Junior Training Sheet/B (4)

; 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" }

@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca [105 x i32], align 16
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  %9 = call noundef zeroext i1 @_ZNSt8ios_base15sync_with_stdioEb(i1 noundef zeroext false)
  %10 = load ptr, ptr @_ZSt3cin, align 8, !tbaa !5
  %11 = getelementptr i8, ptr %10, i64 -24
  %12 = load i64, ptr %11, align 8
  %13 = getelementptr inbounds i8, ptr @_ZSt3cin, i64 %12
  %14 = call noundef ptr @_ZNSt9basic_iosIcSt11char_traitsIcEE3tieEPSo(ptr noundef nonnull align 8 dereferenceable(264) %13, ptr noundef null)
  call void @llvm.lifetime.start.p0(i64 420, ptr %2) #5
  call void @llvm.memset.p0.i64(ptr align 16 %2, i8 0, i64 420, i1 false)
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #5
  %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) %3)
  %16 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %15, ptr noundef nonnull align 4 dereferenceable(4) %4)
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #5
  store i32 1, ptr %5, align 4, !tbaa !8
  br label %17

17:                                               ; preds = %27, %0
  %18 = load i32, ptr %5, align 4, !tbaa !8
  %19 = load i32, ptr %3, align 4, !tbaa !8
  %20 = icmp sle i32 %18, %19
  br i1 %20, label %22, label %21

21:                                               ; preds = %17
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #5
  br label %30

22:                                               ; preds = %17
  %23 = load i32, ptr %5, align 4, !tbaa !8
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds [105 x i32], ptr %2, i64 0, i64 %24
  %26 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %25)
  br label %27

27:                                               ; preds = %22
  %28 = load i32, ptr %5, align 4, !tbaa !8
  %29 = add nsw i32 %28, 1
  store i32 %29, ptr %5, align 4, !tbaa !8
  br label %17, !llvm.loop !11

30:                                               ; preds = %21
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #5
  store i32 0, ptr %6, align 4, !tbaa !8
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #5
  store i32 1, ptr %7, align 4, !tbaa !8
  br label %31

31:                                               ; preds = %64, %30
  %32 = load i32, ptr %7, align 4, !tbaa !8
  %33 = load i32, ptr %3, align 4, !tbaa !8
  %34 = icmp sle i32 %32, %33
  br i1 %34, label %36, label %35

35:                                               ; preds = %31
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #5
  br label %67

36:                                               ; preds = %31
  %37 = load i32, ptr %7, align 4, !tbaa !8
  %38 = sext i32 %37 to i64
  %39 = getelementptr inbounds [105 x i32], ptr %2, i64 0, i64 %38
  %40 = load i32, ptr %39, align 4, !tbaa !8
  %41 = icmp ne i32 %40, 0
  br i1 %41, label %42, label %63

42:                                               ; preds = %36
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #5
  %43 = load i32, ptr %4, align 4, !tbaa !8
  %44 = mul nsw i32 %43, 2
  %45 = load i32, ptr %7, align 4, !tbaa !8
  %46 = sub nsw i32 %44, %45
  store i32 %46, ptr %8, align 4, !tbaa !8
  %47 = load i32, ptr %8, align 4, !tbaa !8
  %48 = icmp sle i32 %47, 0
  br i1 %48, label %59, label %49

49:                                               ; preds = %42
  %50 = load i32, ptr %8, align 4, !tbaa !8
  %51 = load i32, ptr %3, align 4, !tbaa !8
  %52 = icmp sgt i32 %50, %51
  br i1 %52, label %59, label %53

53:                                               ; preds = %49
  %54 = load i32, ptr %8, align 4, !tbaa !8
  %55 = sext i32 %54 to i64
  %56 = getelementptr inbounds [105 x i32], ptr %2, i64 0, i64 %55
  %57 = load i32, ptr %56, align 4, !tbaa !8
  %58 = icmp ne i32 %57, 0
  br i1 %58, label %59, label %62

59:                                               ; preds = %53, %49, %42
  %60 = load i32, ptr %6, align 4, !tbaa !8
  %61 = add nsw i32 %60, 1
  store i32 %61, ptr %6, align 4, !tbaa !8
  br label %62

62:                                               ; preds = %59, %53
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #5
  br label %63

63:                                               ; preds = %62, %36
  br label %64

64:                                               ; preds = %63
  %65 = load i32, ptr %7, align 4, !tbaa !8
  %66 = add nsw i32 %65, 1
  store i32 %66, ptr %7, align 4, !tbaa !8
  br label %31, !llvm.loop !13

67:                                               ; preds = %35
  %68 = load i32, ptr %6, align 4, !tbaa !8
  %69 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %68)
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #5
  call void @llvm.lifetime.end.p0(i64 420, ptr %2) #5
  ret i32 0
}

declare noundef zeroext i1 @_ZNSt8ios_base15sync_with_stdioEb(i1 noundef zeroext) #1

; Function Attrs: mustprogress nounwind uwtable
declare noundef ptr @_ZNSt9basic_iosIcSt11char_traitsIcEE3tieEPSo(ptr noundef nonnull align 8 dereferenceable(264), ptr noundef) #2 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #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 noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 4 dereferenceable(4)) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #3

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) #1

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 = { "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 = { 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 #3 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!"vtable pointer", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"int", !10, i64 0}
!10 = !{!"omnipotent char", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}


; 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" }

@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca [105 x i32], align 16
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = tail call noundef zeroext i1 @_ZNSt8ios_base15sync_with_stdioEb(i1 noundef zeroext false)
  %5 = load ptr, ptr @_ZSt3cin, align 8, !tbaa !5
  %6 = getelementptr i8, ptr %5, i64 -24
  %7 = load i64, ptr %6, align 8
  %8 = getelementptr inbounds i8, ptr @_ZSt3cin, i64 %7
  %9 = tail call noundef ptr @_ZNSt9basic_iosIcSt11char_traitsIcEE3tieEPSo(ptr noundef nonnull align 8 dereferenceable(264) %8, ptr noundef null)
  call void @llvm.lifetime.start.p0(i64 420, ptr nonnull %1) #5
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(420) %1, i8 0, i64 420, i1 false)
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #5
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #5
  %10 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %2)
  %11 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %10, ptr noundef nonnull align 4 dereferenceable(4) %3)
  %12 = load i32, ptr %2, align 4, !tbaa !8
  %.not19 = icmp slt i32 %12, 1
  br i1 %.not19, label %._crit_edge, label %.lr.ph

.preheader:                                       ; preds = %.lr.ph
  %.not1621 = icmp slt i32 %20, 1
  br i1 %.not1621, label %._crit_edge, label %.lr.ph24

.lr.ph24:                                         ; preds = %.preheader
  %13 = load i32, ptr %3, align 4
  %14 = shl nsw i32 %13, 1
  %15 = sext i32 %14 to i64
  %16 = zext nneg i32 %20 to i64
  %17 = add nuw i32 %20, 1
  %wide.trip.count = zext i32 %17 to i64
  br label %23

.lr.ph:                                           ; preds = %0, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 1, %0 ]
  %18 = getelementptr inbounds [105 x i32], ptr %1, i64 0, i64 %indvars.iv
  %19 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %18)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %20 = load i32, ptr %2, align 4, !tbaa !8
  %21 = sext i32 %20 to i64
  %.not.not = icmp slt i64 %indvars.iv, %21
  br i1 %.not.not, label %.lr.ph, label %.preheader, !llvm.loop !11

._crit_edge:                                      ; preds = %35, %0, %.preheader
  %.013.lcssa = phi i32 [ 0, %.preheader ], [ 0, %0 ], [ %.2, %35 ]
  %22 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %.013.lcssa)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #5
  call void @llvm.lifetime.end.p0(i64 420, ptr nonnull %1) #5
  ret i32 0

23:                                               ; preds = %.lr.ph24, %35
  %indvars.iv28 = phi i64 [ 1, %.lr.ph24 ], [ %indvars.iv.next29, %35 ]
  %.01322 = phi i32 [ 0, %.lr.ph24 ], [ %.2, %35 ]
  %24 = getelementptr inbounds [105 x i32], ptr %1, i64 0, i64 %indvars.iv28
  %25 = load i32, ptr %24, align 4, !tbaa !8
  %.not17 = icmp eq i32 %25, 0
  br i1 %.not17, label %35, label %26

26:                                               ; preds = %23
  %27 = sub nsw i64 %15, %indvars.iv28
  %28 = icmp slt i64 %27, 1
  %29 = icmp sgt i64 %27, %16
  %or.cond = or i1 %28, %29
  br i1 %or.cond, label %33, label %30

30:                                               ; preds = %26
  %31 = getelementptr inbounds [105 x i32], ptr %1, i64 0, i64 %27
  %32 = load i32, ptr %31, align 4, !tbaa !8
  %.not18 = icmp eq i32 %32, 0
  br i1 %.not18, label %35, label %33

33:                                               ; preds = %30, %26
  %34 = add nsw i32 %.01322, 1
  br label %35

35:                                               ; preds = %30, %33, %23
  %.2 = phi i32 [ %.01322, %23 ], [ %34, %33 ], [ %.01322, %30 ]
  %indvars.iv.next29 = add nuw nsw i64 %indvars.iv28, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next29, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge, label %23, !llvm.loop !13
}

declare noundef zeroext i1 @_ZNSt8ios_base15sync_with_stdioEb(i1 noundef zeroext) local_unnamed_addr #1

; Function Attrs: mustprogress nounwind uwtable
declare noundef ptr @_ZNSt9basic_iosIcSt11char_traitsIcEE3tieEPSo(ptr noundef nonnull align 8 dereferenceable(264), ptr noundef) local_unnamed_addr #2 align 2

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

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 #1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #3

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) local_unnamed_addr #1

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 = { "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 = { 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 #3 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!"vtable pointer", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"int", !10, i64 0}
!10 = !{!"omnipotent char", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}


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