; LLVM IR from kazunetakahashi/atcoder :: 2019/0714_AGC035/A.ll (Z10sub_solve3RSt3mapIiiSt4lessIiESaISt4pairIKiiEEE)

; 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"

%"struct.std::_Rb_tree_iterator" = type { ptr }
%"struct.std::pair" = type { i32, i32 }

@N = external dso_local global i32, align 4

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z3Yesv() #0

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z2Nov() #0

; 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

; Function Attrs: mustprogress uwtable
define dso_local void @_Z10sub_solve3RSt3mapIiiSt4lessIiESaISt4pairIKiiEEE(ptr noundef nonnull align 8 dereferenceable(48) %0) #0 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca %"struct.std::_Rb_tree_iterator", align 8
  %6 = alloca %"struct.std::_Rb_tree_iterator", align 8
  %7 = alloca %"struct.std::pair", align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #4
  store i32 0, ptr %3, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #4
  %8 = load ptr, ptr %2, align 8, !tbaa !5
  store ptr %8, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #4
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  %10 = call ptr @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEE5beginEv(ptr noundef nonnull align 8 dereferenceable(48) %9) #4
  %11 = getelementptr inbounds %"struct.std::_Rb_tree_iterator", ptr %5, i32 0, i32 0
  store ptr %10, ptr %11, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #4
  %12 = load ptr, ptr %4, align 8, !tbaa !5
  %13 = call ptr @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEE3endEv(ptr noundef nonnull align 8 dereferenceable(48) %12) #4
  %14 = getelementptr inbounds %"struct.std::_Rb_tree_iterator", ptr %6, i32 0, i32 0
  store ptr %13, ptr %14, align 8
  br label %15

15:                                               ; preds = %31, %1
  %16 = call noundef zeroext i1 @_ZStneRKSt17_Rb_tree_iteratorISt4pairIKiiEES5_(ptr noundef nonnull align 8 dereferenceable(8) %5, ptr noundef nonnull align 8 dereferenceable(8) %6) #4
  br i1 %16, label %18, label %17

17:                                               ; preds = %15
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #4
  br label %33

18:                                               ; preds = %15
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #4
  %19 = call noundef nonnull align 4 dereferenceable(8) ptr @_ZNKSt17_Rb_tree_iteratorISt4pairIKiiEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %5) #4
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %7, ptr align 4 %19, i64 8, i1 false)
  %20 = getelementptr inbounds %"struct.std::pair", ptr %7, i32 0, i32 0
  %21 = load i32, ptr %20, align 4, !tbaa !11
  %22 = load i32, ptr %3, align 4, !tbaa !9
  %23 = xor i32 %22, %21
  store i32 %23, ptr %3, align 4, !tbaa !9
  %24 = getelementptr inbounds %"struct.std::pair", ptr %7, i32 0, i32 1
  %25 = load i32, ptr %24, align 4, !tbaa !13
  %26 = load i32, ptr @N, align 4, !tbaa !9
  %27 = sdiv i32 %26, 3
  %28 = icmp ne i32 %25, %27
  br i1 %28, label %29, label %30

29:                                               ; preds = %18
  call void @_Z2Nov()
  br label %30

30:                                               ; preds = %29, %18
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #4
  br label %31

31:                                               ; preds = %30
  %32 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt17_Rb_tree_iteratorISt4pairIKiiEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %5) #4
  br label %15

33:                                               ; preds = %17
  %34 = load i32, ptr %3, align 4, !tbaa !9
  %35 = icmp eq i32 %34, 0
  br i1 %35, label %36, label %37

36:                                               ; preds = %33
  call void @_Z3Yesv()
  br label %37

37:                                               ; preds = %36, %33
  call void @_Z2Nov()
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #4
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEE5beginEv(ptr noundef nonnull align 8 dereferenceable(48)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEE3endEv(ptr noundef nonnull align 8 dereferenceable(48)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZStneRKSt17_Rb_tree_iteratorISt4pairIKiiEES5_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(8) ptr @_ZNKSt17_Rb_tree_iteratorISt4pairIKiiEEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) #2 align 2

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt17_Rb_tree_iteratorISt4pairIKiiEEppEv(ptr noundef nonnull align 8 dereferenceable(8)) #2 align 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 = { 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 nounwind willreturn memory(argmem: readwrite) }
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 = !{!"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 = !{!12, !10, i64 0}
!12 = !{!"_ZTSSt4pairIKiiE", !10, i64 0, !10, i64 4}
!13 = !{!12, !10, i64 4}


; 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"

%"struct.std::_Rb_tree_iterator" = type { ptr }

@N = external dso_local local_unnamed_addr global i32, align 4

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z3Yesv() local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z2Nov() local_unnamed_addr #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

; Function Attrs: mustprogress uwtable
define dso_local void @_Z10sub_solve3RSt3mapIiiSt4lessIiESaISt4pairIKiiEEE(ptr noundef nonnull align 8 dereferenceable(48) %0) local_unnamed_addr #0 {
  %2 = alloca %"struct.std::_Rb_tree_iterator", align 8
  %3 = alloca %"struct.std::_Rb_tree_iterator", align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  %4 = tail call ptr @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEE5beginEv(ptr noundef nonnull align 8 dereferenceable(48) %0) #3
  store ptr %4, ptr %2, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #3
  %5 = tail call ptr @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEE3endEv(ptr noundef nonnull align 8 dereferenceable(48) %0) #3
  store ptr %5, ptr %3, align 8
  %6 = call noundef zeroext i1 @_ZStneRKSt17_Rb_tree_iteratorISt4pairIKiiEES5_(ptr noundef nonnull align 8 dereferenceable(8) %2, ptr noundef nonnull align 8 dereferenceable(8) %3) #3
  br i1 %6, label %.lr.ph, label %._crit_edge.thread

._crit_edge.thread:                               ; preds = %1
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  br label %16

._crit_edge:                                      ; preds = %13
  %7 = icmp eq i32 %.sroa.0.0.copyload, %.04
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  br i1 %7, label %16, label %17

.lr.ph:                                           ; preds = %1, %13
  %.04 = phi i32 [ %9, %13 ], [ 0, %1 ]
  %8 = call noundef nonnull align 4 dereferenceable(8) ptr @_ZNKSt17_Rb_tree_iteratorISt4pairIKiiEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %2) #3
  %.sroa.0.0.copyload = load i32, ptr %8, align 4
  %.sroa.4.0..sroa_idx = getelementptr inbounds i8, ptr %8, i64 4
  %.sroa.4.0.copyload = load i32, ptr %.sroa.4.0..sroa_idx, align 4
  %9 = xor i32 %.sroa.0.0.copyload, %.04
  %10 = load i32, ptr @N, align 4, !tbaa !5
  %11 = sdiv i32 %10, 3
  %.not = icmp eq i32 %.sroa.4.0.copyload, %11
  br i1 %.not, label %13, label %12

12:                                               ; preds = %.lr.ph
  call void @_Z2Nov()
  br label %13

13:                                               ; preds = %12, %.lr.ph
  %14 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt17_Rb_tree_iteratorISt4pairIKiiEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %2) #3
  %15 = call noundef zeroext i1 @_ZStneRKSt17_Rb_tree_iteratorISt4pairIKiiEES5_(ptr noundef nonnull align 8 dereferenceable(8) %2, ptr noundef nonnull align 8 dereferenceable(8) %3) #3
  br i1 %15, label %.lr.ph, label %._crit_edge

16:                                               ; preds = %._crit_edge.thread, %._crit_edge
  call void @_Z3Yesv()
  br label %17

17:                                               ; preds = %16, %._crit_edge
  call void @_Z2Nov()
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEE5beginEv(ptr noundef nonnull align 8 dereferenceable(48)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEE3endEv(ptr noundef nonnull align 8 dereferenceable(48)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZStneRKSt17_Rb_tree_iteratorISt4pairIKiiEES5_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(8) ptr @_ZNKSt17_Rb_tree_iteratorISt4pairIKiiEEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt17_Rb_tree_iteratorISt4pairIKiiEEppEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #2 align 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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { 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"}


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