; LLVM IR from VastoLorde95/Competitive-Programming :: Codeforces/179 Division 1/Problem A/A.ll (Z5buildxxx)

; 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.node = type { i64 }

@a = external dso_local global [262144 x i64], align 16
@tree = external dso_local global [524288 x %struct.node], align 16

; Function Attrs: mustprogress uwtable
define dso_local void @_Z5buildxxx(i64 noundef %0, i64 noundef %1, i64 noundef %2) #0 {
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  %9 = alloca i64, align 8
  store i64 %0, ptr %4, align 8, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !5
  store i64 %2, ptr %6, align 8, !tbaa !5
  %10 = load i64, ptr %5, align 8, !tbaa !5
  %11 = add nsw i64 %10, 1
  %12 = load i64, ptr %6, align 8, !tbaa !5
  %13 = icmp eq i64 %11, %12
  br i1 %13, label %14, label %20

14:                                               ; preds = %3
  %15 = load i64, ptr %4, align 8, !tbaa !5
  %16 = getelementptr inbounds [524288 x %struct.node], ptr @tree, i64 0, i64 %15
  %17 = load i64, ptr %5, align 8, !tbaa !5
  %18 = getelementptr inbounds [262144 x i64], ptr @a, i64 0, i64 %17
  %19 = load i64, ptr %18, align 8, !tbaa !5
  call void @_ZN4node6assignEx(ptr noundef nonnull align 8 dereferenceable(8) %16, i64 noundef %19)
  br label %41

20:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %21 = load i64, ptr %4, align 8, !tbaa !5
  %22 = shl i64 %21, 1
  store i64 %22, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %23 = load i64, ptr %7, align 8, !tbaa !5
  %24 = add nsw i64 %23, 1
  store i64 %24, ptr %8, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #3
  %25 = load i64, ptr %5, align 8, !tbaa !5
  %26 = load i64, ptr %6, align 8, !tbaa !5
  %27 = add nsw i64 %25, %26
  %28 = ashr i64 %27, 1
  store i64 %28, ptr %9, align 8, !tbaa !5
  %29 = load i64, ptr %7, align 8, !tbaa !5
  %30 = load i64, ptr %5, align 8, !tbaa !5
  %31 = load i64, ptr %9, align 8, !tbaa !5
  call void @_Z5buildxxx(i64 noundef %29, i64 noundef %30, i64 noundef %31)
  %32 = load i64, ptr %8, align 8, !tbaa !5
  %33 = load i64, ptr %9, align 8, !tbaa !5
  %34 = load i64, ptr %6, align 8, !tbaa !5
  call void @_Z5buildxxx(i64 noundef %32, i64 noundef %33, i64 noundef %34)
  %35 = load i64, ptr %4, align 8, !tbaa !5
  %36 = getelementptr inbounds [524288 x %struct.node], ptr @tree, i64 0, i64 %35
  %37 = load i64, ptr %7, align 8, !tbaa !5
  %38 = getelementptr inbounds [524288 x %struct.node], ptr @tree, i64 0, i64 %37
  %39 = load i64, ptr %8, align 8, !tbaa !5
  %40 = getelementptr inbounds [524288 x %struct.node], ptr @tree, i64 0, i64 %39
  call void @_ZN4node7combineERS_S0_(ptr noundef nonnull align 8 dereferenceable(8) %36, ptr noundef nonnull align 8 dereferenceable(8) %38, ptr noundef nonnull align 8 dereferenceable(8) %40)
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  br label %41

41:                                               ; preds = %20, %14
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN4node6assignEx(ptr noundef nonnull align 8 dereferenceable(8), i64 noundef) #1 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN4node7combineERS_S0_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #1 align 2

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

%struct.node = type { i64 }

@a = external dso_local local_unnamed_addr global [262144 x i64], align 16
@tree = external dso_local global [524288 x %struct.node], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z5buildxxx(i64 noundef %0, i64 noundef %1, i64 noundef %2) local_unnamed_addr #0 {
  %4 = add nsw i64 %1, 1
  %5 = icmp eq i64 %4, %2
  br i1 %5, label %common.ret, label %9

common.ret:                                       ; preds = %3
  %6 = getelementptr inbounds [524288 x %struct.node], ptr @tree, i64 0, i64 %0
  %7 = getelementptr inbounds [262144 x i64], ptr @a, i64 0, i64 %1
  %8 = load i64, ptr %7, align 8, !tbaa !5
  tail call void @_ZN4node6assignEx(ptr noundef nonnull align 8 dereferenceable(8) %6, i64 noundef %8)
  br label %common.ret17

common.ret17:                                     ; preds = %9, %common.ret
  ret void

9:                                                ; preds = %3
  %10 = shl i64 %0, 1
  %11 = or disjoint i64 %10, 1
  %12 = add nsw i64 %2, %1
  %13 = ashr i64 %12, 1
  tail call void @_Z5buildxxx(i64 noundef %10, i64 noundef %1, i64 noundef %13)
  tail call void @_Z5buildxxx(i64 noundef %11, i64 noundef %13, i64 noundef %2)
  %14 = getelementptr inbounds [524288 x %struct.node], ptr @tree, i64 0, i64 %0
  %15 = getelementptr inbounds [524288 x %struct.node], ptr @tree, i64 0, i64 %10
  %16 = getelementptr inbounds [524288 x %struct.node], ptr @tree, i64 0, i64 %11
  tail call void @_ZN4node7combineERS_S0_(ptr noundef nonnull align 8 dereferenceable(8) %14, ptr noundef nonnull align 8 dereferenceable(8) %15, ptr noundef nonnull align 8 dereferenceable(8) %16)
  br label %common.ret17
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN4node6assignEx(ptr noundef nonnull align 8 dereferenceable(8), i64 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN4node7combineERS_S0_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #0 align 2

attributes #0 = { 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" }

!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: GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass