; LLVM IR from abeaumont/competitive-programming :: aceptaelreto (192)

; 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 [20001 x i8], align 16
@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str = external hidden unnamed_addr constant [4 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  store i8 1, ptr getelementptr inbounds ([20001 x i8], ptr @a, i64 0, i64 1), align 1, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #4
  store i32 1, ptr %2, align 4, !tbaa !9
  br label %6

6:                                                ; preds = %36, %0
  %7 = load i32, ptr %2, align 4, !tbaa !9
  %8 = icmp sle i32 %7, 20000
  br i1 %8, label %10, label %9

9:                                                ; preds = %6
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #4
  br label %39

10:                                               ; preds = %6
  %11 = load i32, ptr %2, align 4, !tbaa !9
  %12 = sext i32 %11 to i64
  %13 = getelementptr inbounds [20001 x i8], ptr @a, i64 0, i64 %12
  %14 = load i8, ptr %13, align 1, !tbaa !5, !range !11, !noundef !12
  %15 = trunc i8 %14 to i1
  br i1 %15, label %16, label %35

16:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #4
  %17 = load i32, ptr %2, align 4, !tbaa !9
  %18 = mul nsw i32 %17, 3
  store i32 %18, ptr %3, align 4, !tbaa !9
  %19 = load i32, ptr %3, align 4, !tbaa !9
  %20 = icmp sle i32 %19, 20000
  br i1 %20, label %21, label %25

21:                                               ; preds = %16
  %22 = load i32, ptr %3, align 4, !tbaa !9
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds [20001 x i8], ptr @a, i64 0, i64 %23
  store i8 1, ptr %24, align 1, !tbaa !5
  br label %25

25:                                               ; preds = %21, %16
  %26 = load i32, ptr %2, align 4, !tbaa !9
  %27 = add nsw i32 %26, 5
  store i32 %27, ptr %3, align 4, !tbaa !9
  %28 = load i32, ptr %3, align 4, !tbaa !9
  %29 = icmp sle i32 %28, 20000
  br i1 %29, label %30, label %34

30:                                               ; preds = %25
  %31 = load i32, ptr %3, align 4, !tbaa !9
  %32 = sext i32 %31 to i64
  %33 = getelementptr inbounds [20001 x i8], ptr @a, i64 0, i64 %32
  store i8 1, ptr %33, align 1, !tbaa !5
  br label %34

34:                                               ; preds = %30, %25
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #4
  br label %35

35:                                               ; preds = %34, %10
  br label %36

36:                                               ; preds = %35
  %37 = load i32, ptr %2, align 4, !tbaa !9
  %38 = add nsw i32 %37, 1
  store i32 %38, ptr %2, align 4, !tbaa !9
  br label %6, !llvm.loop !13

39:                                               ; preds = %9
  br label %40

40:                                               ; preds = %58, %39
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #4
  %41 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %4)
  %42 = load i32, ptr %4, align 4, !tbaa !9
  %43 = icmp ne i32 %42, 0
  br i1 %43, label %45, label %44

44:                                               ; preds = %40
  store i32 6, ptr %5, align 4
  br label %56

45:                                               ; preds = %40
  %46 = load i32, ptr %4, align 4, !tbaa !9
  %47 = sext i32 %46 to i64
  %48 = getelementptr inbounds [20001 x i8], ptr @a, i64 0, i64 %47
  %49 = load i8, ptr %48, align 1, !tbaa !5, !range !11, !noundef !12
  %50 = trunc i8 %49 to i1
  br i1 %50, label %51, label %53

51:                                               ; preds = %45
  %52 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef @.str)
  br label %55

53:                                               ; preds = %45
  %54 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef @.str.1)
  br label %55

55:                                               ; preds = %53, %51
  store i32 0, ptr %5, align 4
  br label %56

56:                                               ; preds = %55, %44
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #4
  %57 = load i32, ptr %5, align 4
  switch i32 %57, label %61 [
    i32 0, label %58
    i32 6, label %59
  ]

58:                                               ; preds = %56
  br label %40, !llvm.loop !15

59:                                               ; preds = %56
  %60 = load i32, ptr %1, align 4
  ret i32 %60

61:                                               ; preds = %56
  unreachable
}

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

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.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: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) #3

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 = { 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 = !{!"bool", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{i8 0, i8 2}
!12 = !{}
!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"

%"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 local_unnamed_addr global [20001 x i8], align 16
@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str = external hidden unnamed_addr constant [4 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca i32, align 4
  store i8 1, ptr getelementptr inbounds (i8, ptr @a, i64 1), align 1, !tbaa !5
  br label %4

.preheader:                                       ; preds = %17
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #4
  %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 !9
  %.not19 = icmp eq i32 %3, 0
  br i1 %.not19, label %._crit_edge, label %.lr.ph

4:                                                ; preds = %0, %17
  %indvars.iv = phi i64 [ 1, %0 ], [ %indvars.iv.next, %17 ]
  %5 = getelementptr inbounds [20001 x i8], ptr @a, i64 0, i64 %indvars.iv
  %6 = load i8, ptr %5, align 1, !tbaa !5, !range !11, !noundef !12
  %7 = trunc nuw i8 %6 to i1
  br i1 %7, label %8, label %17

8:                                                ; preds = %4
  %9 = icmp ult i64 %indvars.iv, 6667
  br i1 %9, label %.thread, label %12

.thread:                                          ; preds = %8
  %10 = mul nuw nsw i64 %indvars.iv, 3
  %11 = getelementptr inbounds [20001 x i8], ptr @a, i64 0, i64 %10
  store i8 1, ptr %11, align 1, !tbaa !5
  br label %14

12:                                               ; preds = %8
  %13 = icmp ult i64 %indvars.iv, 19996
  br i1 %13, label %14, label %17

14:                                               ; preds = %.thread, %12
  %15 = add nuw nsw i64 %indvars.iv, 5
  %16 = getelementptr inbounds [20001 x i8], ptr @a, i64 0, i64 %15
  store i8 1, ptr %16, align 1, !tbaa !5
  br label %17

17:                                               ; preds = %12, %14, %4
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, 20001
  br i1 %exitcond.not, label %.preheader, label %4, !llvm.loop !13

.lr.ph:                                           ; preds = %.preheader, %.lr.ph
  %18 = phi i32 [ %25, %.lr.ph ], [ %3, %.preheader ]
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds [20001 x i8], ptr @a, i64 0, i64 %19
  %21 = load i8, ptr %20, align 1, !tbaa !5, !range !11, !noundef !12
  %22 = trunc nuw i8 %21 to i1
  %.str..str.1 = select i1 %22, ptr @.str, ptr @.str.1
  %23 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef nonnull %.str..str.1)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #4
  %24 = 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)
  %25 = load i32, ptr %1, align 4, !tbaa !9
  %.not = icmp eq i32 %25, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %.lr.ph, %.preheader
  call void @llvm.lifetime.end.p0(i64 4, 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: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.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: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) local_unnamed_addr #3

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 = { "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 = !{!"bool", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{i8 0, i8 2}
!12 = !{}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass