; LLVM IR from VastoLorde95/Competitive-Programming :: SPOJ/Week 2/bytelandian/byte.ll (Z6answerx)

; 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<long long, std::pair<const long long, long long>, std::_Select1st<std::pair<const long long, long long>>, std::less<long long>>::_Rb_tree_impl" }
%"struct.std::_Rb_tree<long long, std::pair<const long long, long long>, std::_Select1st<std::pair<const long long, long long>>, std::less<long long>>::_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_iterator" = type { ptr }

@a = external dso_local global %"class.std::map", align 8

; Function Attrs: mustprogress uwtable
define dso_local noundef i64 @_Z6answerx(i64 noundef %0) #0 {
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i32, align 4
  %6 = alloca %"struct.std::_Rb_tree_iterator", align 8
  %7 = alloca %"struct.std::_Rb_tree_iterator", align 8
  store i64 %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %8 = load i64, ptr %3, align 8, !tbaa !5
  %9 = icmp eq i64 %8, 0
  br i1 %9, label %10, label %11

10:                                               ; preds = %1
  store i64 0, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %42

11:                                               ; preds = %1
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %12 = call ptr @_ZNSt3mapIxxSt4lessIxESaISt4pairIKxxEEE4findERS3_(ptr noundef nonnull align 8 dereferenceable(48) @a, ptr noundef nonnull align 8 dereferenceable(8) %3)
  %13 = getelementptr inbounds %"struct.std::_Rb_tree_iterator", ptr %6, i32 0, i32 0
  store ptr %12, ptr %13, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %14 = call ptr @_ZNSt3mapIxxSt4lessIxESaISt4pairIKxxEEE3endEv(ptr noundef nonnull align 8 dereferenceable(48) @a) #3
  %15 = getelementptr inbounds %"struct.std::_Rb_tree_iterator", ptr %7, i32 0, i32 0
  store ptr %14, ptr %15, align 8
  %16 = call noundef zeroext i1 @_ZSteqRKSt17_Rb_tree_iteratorISt4pairIKxxEES5_(ptr noundef nonnull align 8 dereferenceable(8) %6, ptr noundef nonnull align 8 dereferenceable(8) %7) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  br i1 %16, label %17, label %39

17:                                               ; preds = %11
  %18 = load i64, ptr %3, align 8, !tbaa !5
  %19 = sdiv i64 %18, 2
  %20 = call noundef i64 @_Z6answerx(i64 noundef %19)
  %21 = load i64, ptr %3, align 8, !tbaa !5
  %22 = sdiv i64 %21, 3
  %23 = call noundef i64 @_Z6answerx(i64 noundef %22)
  %24 = add nsw i64 %20, %23
  %25 = load i64, ptr %3, align 8, !tbaa !5
  %26 = sdiv i64 %25, 4
  %27 = call noundef i64 @_Z6answerx(i64 noundef %26)
  %28 = add nsw i64 %24, %27
  store i64 %28, ptr %4, align 8, !tbaa !5
  %29 = load i64, ptr %4, align 8, !tbaa !5
  %30 = load i64, ptr %3, align 8, !tbaa !5
  %31 = icmp sgt i64 %29, %30
  br i1 %31, label %32, label %35

32:                                               ; preds = %17
  %33 = load i64, ptr %4, align 8, !tbaa !5
  %34 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt3mapIxxSt4lessIxESaISt4pairIKxxEEEixERS3_(ptr noundef nonnull align 8 dereferenceable(48) @a, ptr noundef nonnull align 8 dereferenceable(8) %3)
  store i64 %33, ptr %34, align 8, !tbaa !5
  br label %38

35:                                               ; preds = %17
  %36 = load i64, ptr %3, align 8, !tbaa !5
  %37 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt3mapIxxSt4lessIxESaISt4pairIKxxEEEixERS3_(ptr noundef nonnull align 8 dereferenceable(48) @a, ptr noundef nonnull align 8 dereferenceable(8) %3)
  store i64 %36, ptr %37, align 8, !tbaa !5
  br label %38

38:                                               ; preds = %35, %32
  br label %39

39:                                               ; preds = %38, %11
  %40 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt3mapIxxSt4lessIxESaISt4pairIKxxEEEixERS3_(ptr noundef nonnull align 8 dereferenceable(48) @a, ptr noundef nonnull align 8 dereferenceable(8) %3)
  %41 = load i64, ptr %40, align 8, !tbaa !5
  store i64 %41, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %42

42:                                               ; preds = %39, %10
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  %43 = load i64, ptr %2, align 8
  ret i64 %43
}

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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZSteqRKSt17_Rb_tree_iteratorISt4pairIKxxEES5_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #2

; Function Attrs: mustprogress uwtable
declare dso_local ptr @_ZNSt3mapIxxSt4lessIxESaISt4pairIKxxEEE4findERS3_(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef nonnull align 8 dereferenceable(8)) #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt3mapIxxSt4lessIxESaISt4pairIKxxEEE3endEv(ptr noundef nonnull align 8 dereferenceable(48)) #2 align 2

; 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
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt3mapIxxSt4lessIxESaISt4pairIKxxEEEixERS3_(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef nonnull align 8 dereferenceable(8)) #0 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 = { 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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


; 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<long long, std::pair<const long long, long long>, std::_Select1st<std::pair<const long long, long long>>, std::less<long long>>::_Rb_tree_impl" }
%"struct.std::_Rb_tree<long long, std::pair<const long long, long long>, std::_Select1st<std::pair<const long long, long long>>, std::less<long long>>::_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_iterator" = type { ptr }

@a = external dso_local global %"class.std::map", align 8

; Function Attrs: mustprogress uwtable
define dso_local noundef i64 @_Z6answerx(i64 noundef %0) local_unnamed_addr #0 {
  %2 = alloca i64, align 8
  %3 = alloca %"struct.std::_Rb_tree_iterator", align 8
  %4 = alloca %"struct.std::_Rb_tree_iterator", align 8
  store i64 %0, ptr %2, align 8, !tbaa !5
  %5 = icmp eq i64 %0, 0
  br i1 %5, label %26, label %6

6:                                                ; preds = %1
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #4
  %7 = call ptr @_ZNSt3mapIxxSt4lessIxESaISt4pairIKxxEEE4findERS3_(ptr noundef nonnull align 8 dereferenceable(48) @a, ptr noundef nonnull align 8 dereferenceable(8) %2)
  store ptr %7, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #4
  %8 = call ptr @_ZNSt3mapIxxSt4lessIxESaISt4pairIKxxEEE3endEv(ptr noundef nonnull align 8 dereferenceable(48) @a) #4
  store ptr %8, ptr %4, align 8
  %9 = call noundef zeroext i1 @_ZSteqRKSt17_Rb_tree_iteratorISt4pairIKxxEES5_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(8) %4) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #4
  br i1 %9, label %.sink.split, label %23

.sink.split:                                      ; preds = %6
  %10 = load i64, ptr %2, align 8, !tbaa !5
  %11 = sdiv i64 %10, 2
  %12 = call noundef i64 @_Z6answerx(i64 noundef %11)
  %13 = load i64, ptr %2, align 8, !tbaa !5
  %14 = sdiv i64 %13, 3
  %15 = call noundef i64 @_Z6answerx(i64 noundef %14)
  %16 = add nsw i64 %15, %12
  %17 = load i64, ptr %2, align 8, !tbaa !5
  %18 = sdiv i64 %17, 4
  %19 = call noundef i64 @_Z6answerx(i64 noundef %18)
  %20 = add nsw i64 %16, %19
  %21 = load i64, ptr %2, align 8, !tbaa !5
  %22 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt3mapIxxSt4lessIxESaISt4pairIKxxEEEixERS3_(ptr noundef nonnull align 8 dereferenceable(48) @a, ptr noundef nonnull align 8 dereferenceable(8) %2)
  %. = call i64 @llvm.smax.i64(i64 %20, i64 %21)
  store i64 %., ptr %22, align 8, !tbaa !5
  br label %23

23:                                               ; preds = %.sink.split, %6
  %24 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt3mapIxxSt4lessIxESaISt4pairIKxxEEEixERS3_(ptr noundef nonnull align 8 dereferenceable(48) @a, ptr noundef nonnull align 8 dereferenceable(8) %2)
  %25 = load i64, ptr %24, align 8, !tbaa !5
  br label %26

26:                                               ; preds = %1, %23
  %.0 = phi i64 [ %25, %23 ], [ 0, %1 ]
  ret i64 %.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 nounwind uwtable
declare dso_local noundef zeroext i1 @_ZSteqRKSt17_Rb_tree_iteratorISt4pairIKxxEES5_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #2

; Function Attrs: mustprogress uwtable
declare dso_local ptr @_ZNSt3mapIxxSt4lessIxESaISt4pairIKxxEEE4findERS3_(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt3mapIxxSt4lessIxESaISt4pairIKxxEEE3endEv(ptr noundef nonnull align 8 dereferenceable(48)) local_unnamed_addr #2 align 2

; 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
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt3mapIxxSt4lessIxESaISt4pairIKxxEEEixERS3_(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #0 align 2

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.smax.i64(i64, i64) #3

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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,ReassociatePass,SROAPass,SimplifyCFGPass