; LLVM IR from VastoLorde95/Competitive-Programming :: Codeforces/167 Division 2/Problem C/C.ll (Z5buildiii)

; 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
@lazy = 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 @_Z5buildiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) #0 {
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  store i32 %2, ptr %6, align 4, !tbaa !5
  %10 = load i32, ptr %4, align 4, !tbaa !5
  %11 = sext i32 %10 to i64
  %12 = getelementptr inbounds [262144 x i64], ptr @lazy, i64 0, i64 %11
  store i64 -1, ptr %12, align 8, !tbaa !9
  %13 = load i32, ptr %5, align 4, !tbaa !5
  %14 = add nsw i32 %13, 1
  %15 = load i32, ptr %6, align 4, !tbaa !5
  %16 = icmp eq i32 %14, %15
  br i1 %16, label %17, label %25

17:                                               ; preds = %3
  %18 = load i32, ptr %4, align 4, !tbaa !5
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds [524288 x %struct.node], ptr @tree, i64 0, i64 %19
  %21 = load i32, ptr %5, align 4, !tbaa !5
  %22 = sext i32 %21 to i64
  %23 = getelementptr inbounds [262144 x i64], ptr @a, i64 0, i64 %22
  %24 = load i64, ptr %23, align 8, !tbaa !9
  call void @_ZN4node6assignEx(ptr noundef nonnull align 8 dereferenceable(8) %20, i64 noundef %24)
  br label %49

25:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %26 = load i32, ptr %4, align 4, !tbaa !5
  %27 = shl i32 %26, 1
  store i32 %27, ptr %7, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  %28 = load i32, ptr %7, align 4, !tbaa !5
  %29 = add nsw i32 %28, 1
  store i32 %29, ptr %8, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  %30 = load i32, ptr %5, align 4, !tbaa !5
  %31 = load i32, ptr %6, align 4, !tbaa !5
  %32 = add nsw i32 %30, %31
  %33 = ashr i32 %32, 1
  store i32 %33, ptr %9, align 4, !tbaa !5
  %34 = load i32, ptr %7, align 4, !tbaa !5
  %35 = load i32, ptr %5, align 4, !tbaa !5
  %36 = load i32, ptr %9, align 4, !tbaa !5
  call void @_Z5buildiii(i32 noundef %34, i32 noundef %35, i32 noundef %36)
  %37 = load i32, ptr %8, align 4, !tbaa !5
  %38 = load i32, ptr %9, align 4, !tbaa !5
  %39 = load i32, ptr %6, align 4, !tbaa !5
  call void @_Z5buildiii(i32 noundef %37, i32 noundef %38, i32 noundef %39)
  %40 = load i32, ptr %4, align 4, !tbaa !5
  %41 = sext i32 %40 to i64
  %42 = getelementptr inbounds [524288 x %struct.node], ptr @tree, i64 0, i64 %41
  %43 = load i32, ptr %7, align 4, !tbaa !5
  %44 = sext i32 %43 to i64
  %45 = getelementptr inbounds [524288 x %struct.node], ptr @tree, i64 0, i64 %44
  %46 = load i32, ptr %8, align 4, !tbaa !5
  %47 = sext i32 %46 to i64
  %48 = getelementptr inbounds [524288 x %struct.node], ptr @tree, i64 0, i64 %47
  call void @_ZN4node7combineERS_S0_(ptr noundef nonnull align 8 dereferenceable(8) %42, ptr noundef nonnull align 8 dereferenceable(8) %45, ptr noundef nonnull align 8 dereferenceable(8) %48)
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  br label %49

49:                                               ; preds = %25, %17
  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 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)) #0 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long long", !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"

%struct.node = type { i64 }

@a = external dso_local local_unnamed_addr global [262144 x i64], align 16
@lazy = 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 uwtable
define dso_local void @_Z5buildiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = sext i32 %0 to i64
  %5 = getelementptr inbounds [262144 x i64], ptr @lazy, i64 0, i64 %4
  store i64 -1, ptr %5, align 8, !tbaa !5
  %6 = add nsw i32 %1, 1
  %7 = icmp eq i32 %6, %2
  br i1 %7, label %common.ret, label %12

common.ret:                                       ; preds = %3
  %8 = getelementptr inbounds [524288 x %struct.node], ptr @tree, i64 0, i64 %4
  %9 = sext i32 %1 to i64
  %10 = getelementptr inbounds [262144 x i64], ptr @a, i64 0, i64 %9
  %11 = load i64, ptr %10, align 8, !tbaa !5
  tail call void @_ZN4node6assignEx(ptr noundef nonnull align 8 dereferenceable(8) %8, i64 noundef %11)
  br label %common.ret18

common.ret18:                                     ; preds = %12, %common.ret
  ret void

12:                                               ; preds = %3
  %13 = shl i32 %0, 1
  %14 = or disjoint i32 %13, 1
  %15 = add nsw i32 %2, %1
  %16 = ashr i32 %15, 1
  tail call void @_Z5buildiii(i32 noundef %13, i32 noundef %1, i32 noundef %16)
  tail call void @_Z5buildiii(i32 noundef %14, i32 noundef %16, i32 noundef %2)
  %17 = getelementptr inbounds [524288 x %struct.node], ptr @tree, i64 0, i64 %4
  %18 = sext i32 %13 to i64
  %19 = getelementptr inbounds [524288 x %struct.node], ptr @tree, i64 0, i64 %18
  %20 = sext i32 %14 to i64
  %21 = getelementptr inbounds [524288 x %struct.node], ptr @tree, i64 0, i64 %20
  tail call void @_ZN4node7combineERS_S0_(ptr noundef nonnull align 8 dereferenceable(8) %17, ptr noundef nonnull align 8 dereferenceable(8) %19, ptr noundef nonnull align 8 dereferenceable(8) %21)
  br label %common.ret18
}

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

; Function Attrs: mustprogress 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 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" }

!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,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass