; LLVM IR from kazunetakahashi/atcoder :: 2019/1123_ddcc2020-qual/E.ll (Z6answerRKSt6vectorIbSaIbEE)

; 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_ostream" = type { ptr, %"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 }

@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@N = external dso_local global i32, align 4
@.str.3 = external hidden unnamed_addr constant [87 x i8], align 1
@.str.9 = external hidden unnamed_addr constant [36 x i8], align 1
@__PRETTY_FUNCTION__._Z6answerRKSt6vectorIbSaIbEE = external hidden unnamed_addr constant [34 x i8], align 1
@.str.10 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.11 = external hidden unnamed_addr constant [2 x i8], align 1
@.str.12 = external hidden unnamed_addr constant [2 x i8], align 1

; 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) #0

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) #1 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_(ptr noundef nonnull align 8 dereferenceable(8)) #0

; Function Attrs: noreturn nounwind
declare void @__assert_fail(ptr noundef, ptr noundef, i32 noundef, ptr noundef) #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 nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #3

; Function Attrs: mustprogress uwtable
define dso_local void @_Z6answerRKSt6vectorIbSaIbEE(ptr noundef nonnull align 8 dereferenceable(40) %0) #1 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  %4 = load ptr, ptr %2, align 8, !tbaa !5
  %5 = call noundef i64 @_ZNKSt6vectorIbSaIbEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(40) %4) #5
  %6 = trunc i64 %5 to i32
  %7 = load i32, ptr @N, align 4, !tbaa !9
  %8 = mul nsw i32 2, %7
  %9 = icmp eq i32 %6, %8
  br i1 %9, label %10, label %11

10:                                               ; preds = %1
  br label %13

11:                                               ; preds = %1
  call void @__assert_fail(ptr noundef @.str.9, ptr noundef @.str.3, i32 noundef 220, ptr noundef @__PRETTY_FUNCTION__._Z6answerRKSt6vectorIbSaIbEE) #6
  unreachable

12:                                               ; No predecessors!
  br label %13

13:                                               ; preds = %12, %10
  %14 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef @.str.10)
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #5
  store i32 0, ptr %3, align 4, !tbaa !9
  br label %15

15:                                               ; preds = %32, %13
  %16 = load i32, ptr %3, align 4, !tbaa !9
  %17 = load i32, ptr @N, align 4, !tbaa !9
  %18 = mul nsw i32 2, %17
  %19 = icmp slt i32 %16, %18
  br i1 %19, label %21, label %20

20:                                               ; preds = %15
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #5
  br label %35

21:                                               ; preds = %15
  %22 = load ptr, ptr %2, align 8, !tbaa !5
  %23 = load i32, ptr %3, align 4, !tbaa !9
  %24 = sext i32 %23 to i64
  %25 = call noundef zeroext i1 @_ZNKSt6vectorIbSaIbEEixEm(ptr noundef nonnull align 8 dereferenceable(40) %22, i64 noundef %24)
  br i1 %25, label %26, label %27

26:                                               ; preds = %21
  br label %28

27:                                               ; preds = %21
  br label %28

28:                                               ; preds = %27, %26
  %29 = phi ptr [ @.str.11, %26 ], [ @.str.12, %27 ]
  %30 = getelementptr inbounds [2 x i8], ptr %29, i64 0, i64 0
  %31 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef %30)
  br label %32

32:                                               ; preds = %28
  %33 = load i32, ptr %3, align 4, !tbaa !9
  %34 = add nsw i32 %33, 1
  store i32 %34, ptr %3, align 4, !tbaa !9
  br label %15, !llvm.loop !11

35:                                               ; preds = %20
  %36 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIbSaIbEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(40)) #4 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_ZNKSt6vectorIbSaIbEEixEm(ptr noundef nonnull align 8 dereferenceable(40), i64 noundef) #1 align 2

attributes #0 = { 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 #1 = { 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 #2 = { noreturn 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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #4 = { 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 #5 = { nounwind }
attributes #6 = { noreturn 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 = !{!"int", !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"

%"class.std::basic_ostream" = type { ptr, %"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 }

@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@N = external dso_local local_unnamed_addr global i32, align 4
@.str.3 = external hidden unnamed_addr constant [87 x i8], align 1
@.str.9 = external hidden unnamed_addr constant [36 x i8], align 1
@__PRETTY_FUNCTION__._Z6answerRKSt6vectorIbSaIbEE = external hidden unnamed_addr constant [34 x i8], align 1
@.str.10 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.11 = external hidden unnamed_addr constant [2 x i8], align 1
@.str.12 = external hidden unnamed_addr constant [2 x i8], align 1

; 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 #0

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) local_unnamed_addr #1 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_(ptr noundef nonnull align 8 dereferenceable(8)) #0

; Function Attrs: noreturn nounwind
declare void @__assert_fail(ptr noundef, ptr noundef, i32 noundef, ptr noundef) local_unnamed_addr #2

; Function Attrs: mustprogress uwtable
define dso_local void @_Z6answerRKSt6vectorIbSaIbEE(ptr noundef nonnull align 8 dereferenceable(40) %0) local_unnamed_addr #1 {
  %2 = tail call noundef i64 @_ZNKSt6vectorIbSaIbEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(40) %0) #4
  %3 = trunc i64 %2 to i32
  %4 = load i32, ptr @N, align 4, !tbaa !5
  %5 = shl nsw i32 %4, 1
  %6 = icmp eq i32 %5, %3
  br i1 %6, label %8, label %7

7:                                                ; preds = %1
  tail call void @__assert_fail(ptr noundef nonnull @.str.9, ptr noundef nonnull @.str.3, i32 noundef 220, ptr noundef nonnull @__PRETTY_FUNCTION__._Z6answerRKSt6vectorIbSaIbEE) #5
  unreachable

8:                                                ; preds = %1
  %9 = tail 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.10)
  %10 = load i32, ptr @N, align 4, !tbaa !5
  %11 = icmp sgt i32 %10, 0
  br i1 %11, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %8
  %12 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef nonnull @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  ret void

.lr.ph:                                           ; preds = %8, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %8 ]
  %13 = tail call noundef zeroext i1 @_ZNKSt6vectorIbSaIbEEixEm(ptr noundef nonnull align 8 dereferenceable(40) %0, i64 noundef %indvars.iv)
  %.str.11..str.12 = select i1 %13, ptr @.str.11, ptr @.str.12
  %14 = tail 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.11..str.12)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %15 = load i32, ptr @N, align 4, !tbaa !5
  %16 = shl nsw i32 %15, 1
  %17 = sext i32 %16 to i64
  %18 = icmp slt i64 %indvars.iv.next, %17
  br i1 %18, label %.lr.ph, label %._crit_edge, !llvm.loop !9
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIbSaIbEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(40)) local_unnamed_addr #3 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_ZNKSt6vectorIbSaIbEEixEm(ptr noundef nonnull align 8 dereferenceable(40), i64 noundef) local_unnamed_addr #1 align 2

attributes #0 = { 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 #1 = { 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 #2 = { noreturn 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 = { 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 #4 = { nounwind }
attributes #5 = { noreturn 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"}


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