; LLVM IR from kazunetakahashi/atcoder :: 2019/0721_AGC036/E.ll (Z8make_revRKSt3mapIccSt4lessIcESaISt4pairIKccEEE)

; 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::map" = type { %"class.std::_Rb_tree" }
%"class.std::_Rb_tree" = type { %"struct.std::_Rb_tree<char, std::pair<const char, char>, std::_Select1st<std::pair<const char, char>>, std::less<char>>::_Rb_tree_impl" }
%"struct.std::_Rb_tree<char, std::pair<const char, char>, std::_Select1st<std::pair<const char, char>>, std::less<char>>::_Rb_tree_impl" = type { [8 x i8], %"struct.std::_Rb_tree_header" }
%"struct.std::_Rb_tree_header" = type { %"struct.std::_Rb_tree_node_base", i64 }
%"struct.std::_Rb_tree_node_base" = type { i32, ptr, ptr, ptr }
%"struct.std::_Rb_tree_const_iterator" = type { ptr }
%"struct.std::pair" = type { i8, i8 }

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

declare i32 @__gxx_personality_v0(...)

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt3mapIccSt4lessIcESaISt4pairIKccEEEC2Ev(ptr noundef nonnull align 8 dereferenceable(48)) unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt3mapIccSt4lessIcESaISt4pairIKccEEEixERS3_(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef nonnull align 1 dereferenceable(1)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt3mapIccSt4lessIcESaISt4pairIKccEEED2Ev(ptr noundef nonnull align 8 dereferenceable(48)) unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_Z8make_revRKSt3mapIccSt4lessIcESaISt4pairIKccEEE(ptr dead_on_unwind noalias writable sret(%"class.std::map") align 8 %0, ptr noundef nonnull align 8 dereferenceable(48) %1) #2 personality ptr @__gxx_personality_v0 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i1, align 1
  %6 = alloca ptr, align 8
  %7 = alloca %"struct.std::_Rb_tree_const_iterator", align 8
  %8 = alloca %"struct.std::_Rb_tree_const_iterator", align 8
  %9 = alloca %"struct.std::pair", align 1
  %10 = alloca ptr, align 8
  %11 = alloca i32, align 4
  store ptr %0, ptr %3, align 8
  store ptr %1, ptr %4, align 8, !tbaa !5
  store i1 false, ptr %5, align 1
  call void @_ZNSt3mapIccSt4lessIcESaISt4pairIKccEEEC2Ev(ptr noundef nonnull align 8 dereferenceable(48) %0) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #4
  %12 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %12, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #4
  %13 = load ptr, ptr %6, align 8, !tbaa !5
  %14 = call ptr @_ZNKSt3mapIccSt4lessIcESaISt4pairIKccEEE5beginEv(ptr noundef nonnull align 8 dereferenceable(48) %13) #4
  %15 = getelementptr inbounds %"struct.std::_Rb_tree_const_iterator", ptr %7, i32 0, i32 0
  store ptr %14, ptr %15, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #4
  %16 = load ptr, ptr %6, align 8, !tbaa !5
  %17 = call ptr @_ZNKSt3mapIccSt4lessIcESaISt4pairIKccEEE3endEv(ptr noundef nonnull align 8 dereferenceable(48) %16) #4
  %18 = getelementptr inbounds %"struct.std::_Rb_tree_const_iterator", ptr %8, i32 0, i32 0
  store ptr %17, ptr %18, align 8
  br label %19

19:                                               ; preds = %29, %2
  %20 = call noundef zeroext i1 @_ZStneRKSt23_Rb_tree_const_iteratorISt4pairIKccEES5_(ptr noundef nonnull align 8 dereferenceable(8) %7, ptr noundef nonnull align 8 dereferenceable(8) %8) #4
  br i1 %20, label %22, label %21

21:                                               ; preds = %19
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  br label %35

22:                                               ; preds = %19
  call void @llvm.lifetime.start.p0(i64 2, ptr %9) #4
  %23 = call noundef nonnull align 1 dereferenceable(2) ptr @_ZNKSt23_Rb_tree_const_iteratorISt4pairIKccEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %7) #4
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %9, ptr align 1 %23, i64 2, i1 false)
  %24 = getelementptr inbounds %"struct.std::pair", ptr %9, i32 0, i32 0
  %25 = load i8, ptr %24, align 1, !tbaa !9
  %26 = getelementptr inbounds %"struct.std::pair", ptr %9, i32 0, i32 1
  %27 = invoke noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt3mapIccSt4lessIcESaISt4pairIKccEEEixERS3_(ptr noundef nonnull align 8 dereferenceable(48) %0, ptr noundef nonnull align 1 dereferenceable(1) %26)
          to label %28 unwind label %31

28:                                               ; preds = %22
  store i8 %25, ptr %27, align 1, !tbaa !11
  call void @llvm.lifetime.end.p0(i64 2, ptr %9) #4
  br label %29

29:                                               ; preds = %28
  %30 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt23_Rb_tree_const_iteratorISt4pairIKccEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %7) #4
  br label %19

31:                                               ; preds = %22
  %32 = landingpad { ptr, i32 }
          cleanup
  %33 = extractvalue { ptr, i32 } %32, 0
  store ptr %33, ptr %10, align 8
  %34 = extractvalue { ptr, i32 } %32, 1
  store i32 %34, ptr %11, align 4
  call void @llvm.lifetime.end.p0(i64 2, ptr %9) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  call void @_ZNSt3mapIccSt4lessIcESaISt4pairIKccEEED2Ev(ptr noundef nonnull align 8 dereferenceable(48) %0) #4
  br label %39

35:                                               ; preds = %21
  store i1 true, ptr %5, align 1
  %36 = load i1, ptr %5, align 1
  br i1 %36, label %38, label %37

37:                                               ; preds = %35
  call void @_ZNSt3mapIccSt4lessIcESaISt4pairIKccEEED2Ev(ptr noundef nonnull align 8 dereferenceable(48) %0) #4
  br label %38

38:                                               ; preds = %37, %35
  ret void

39:                                               ; preds = %31
  %40 = load ptr, ptr %10, align 8
  %41 = load i32, ptr %11, align 4
  %42 = insertvalue { ptr, i32 } poison, ptr %40, 0
  %43 = insertvalue { ptr, i32 } %42, i32 %41, 1
  resume { ptr, i32 } %43
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNKSt3mapIccSt4lessIcESaISt4pairIKccEEE5beginEv(ptr noundef nonnull align 8 dereferenceable(48)) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNKSt3mapIccSt4lessIcESaISt4pairIKccEEE3endEv(ptr noundef nonnull align 8 dereferenceable(48)) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZStneRKSt23_Rb_tree_const_iteratorISt4pairIKccEES5_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 1 dereferenceable(2) ptr @_ZNKSt23_Rb_tree_const_iteratorISt4pairIKccEEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) #1 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 @_ZNSt23_Rb_tree_const_iteratorISt4pairIKccEEppEv(ptr noundef nonnull align 8 dereferenceable(8)) #1 align 2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { 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 #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, !7, i64 0}
!10 = !{!"_ZTSSt4pairIKccE", !7, i64 0, !7, i64 1}
!11 = !{!7, !7, i64 0}


; 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::map" = type { %"class.std::_Rb_tree" }
%"class.std::_Rb_tree" = type { %"struct.std::_Rb_tree<char, std::pair<const char, char>, std::_Select1st<std::pair<const char, char>>, std::less<char>>::_Rb_tree_impl" }
%"struct.std::_Rb_tree<char, std::pair<const char, char>, std::_Select1st<std::pair<const char, char>>, std::less<char>>::_Rb_tree_impl" = type { [8 x i8], %"struct.std::_Rb_tree_header" }
%"struct.std::_Rb_tree_header" = type { %"struct.std::_Rb_tree_node_base", i64 }
%"struct.std::_Rb_tree_node_base" = type { i32, ptr, ptr, ptr }
%"struct.std::_Rb_tree_const_iterator" = type { ptr }
%"struct.std::pair" = type { i8, i8 }

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt3mapIccSt4lessIcESaISt4pairIKccEEEC2Ev(ptr noundef nonnull align 8 dereferenceable(48)) unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt3mapIccSt4lessIcESaISt4pairIKccEEEixERS3_(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef nonnull align 1 dereferenceable(1)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt3mapIccSt4lessIcESaISt4pairIKccEEED2Ev(ptr noundef nonnull align 8 dereferenceable(48)) unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_Z8make_revRKSt3mapIccSt4lessIcESaISt4pairIKccEEE(ptr dead_on_unwind noalias nonnull writable sret(%"class.std::map") align 8 %0, ptr noundef nonnull align 8 dereferenceable(48) %1) local_unnamed_addr #2 personality ptr @__gxx_personality_v0 {
  %3 = alloca %"struct.std::_Rb_tree_const_iterator", align 8
  %4 = alloca %"struct.std::_Rb_tree_const_iterator", align 8
  %5 = alloca %"struct.std::pair", align 2
  tail call void @_ZNSt3mapIccSt4lessIcESaISt4pairIKccEEEC2Ev(ptr noundef nonnull align 8 dereferenceable(48) %0) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #3
  %6 = tail call ptr @_ZNKSt3mapIccSt4lessIcESaISt4pairIKccEEE5beginEv(ptr noundef nonnull align 8 dereferenceable(48) %1) #3
  store ptr %6, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #3
  %7 = tail call ptr @_ZNKSt3mapIccSt4lessIcESaISt4pairIKccEEE3endEv(ptr noundef nonnull align 8 dereferenceable(48) %1) #3
  store ptr %7, ptr %4, align 8
  %8 = call noundef zeroext i1 @_ZStneRKSt23_Rb_tree_const_iteratorISt4pairIKccEES5_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(8) %4) #3
  br i1 %8, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %2
  %9 = getelementptr inbounds i8, ptr %5, i64 1
  br label %10

._crit_edge:                                      ; preds = %14, %2
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  ret void

10:                                               ; preds = %.lr.ph, %14
  call void @llvm.lifetime.start.p0(i64 2, ptr nonnull %5) #3
  %11 = call noundef nonnull align 1 dereferenceable(2) ptr @_ZNKSt23_Rb_tree_const_iteratorISt4pairIKccEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %3) #3
  %12 = load i16, ptr %11, align 1
  store i16 %12, ptr %5, align 2
  %13 = invoke noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt3mapIccSt4lessIcESaISt4pairIKccEEEixERS3_(ptr noundef nonnull align 8 dereferenceable(48) %0, ptr noundef nonnull align 1 dereferenceable(1) %9)
          to label %14 unwind label %18

14:                                               ; preds = %10
  %15 = trunc i16 %12 to i8
  store i8 %15, ptr %13, align 1, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 2, ptr nonnull %5) #3
  %16 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt23_Rb_tree_const_iteratorISt4pairIKccEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %3) #3
  %17 = call noundef zeroext i1 @_ZStneRKSt23_Rb_tree_const_iteratorISt4pairIKccEES5_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(8) %4) #3
  br i1 %17, label %10, label %._crit_edge

18:                                               ; preds = %10
  %19 = landingpad { ptr, i32 }
          cleanup
  call void @llvm.lifetime.end.p0(i64 2, ptr nonnull %5) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  call void @_ZNSt3mapIccSt4lessIcESaISt4pairIKccEEED2Ev(ptr noundef nonnull align 8 dereferenceable(48) %0) #3
  resume { ptr, i32 } %19
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNKSt3mapIccSt4lessIcESaISt4pairIKccEEE5beginEv(ptr noundef nonnull align 8 dereferenceable(48)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNKSt3mapIccSt4lessIcESaISt4pairIKccEEE3endEv(ptr noundef nonnull align 8 dereferenceable(48)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZStneRKSt23_Rb_tree_const_iteratorISt4pairIKccEES5_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 1 dereferenceable(2) ptr @_ZNKSt23_Rb_tree_const_iteratorISt4pairIKccEEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt23_Rb_tree_const_iteratorISt4pairIKccEEppEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #1 align 2

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { 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 #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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass