; LLVM IR from VastoLorde95/Competitive-Programming :: Codeforces/312 Division 2/Problem E/E.ll (Z5buildiiii)

; 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 { i32 }

@a = external dso_local global [262144 x i32], align 16
@tree = external dso_local global [26 x [524288 x %struct.node]], align 16

; Function Attrs: mustprogress uwtable
define dso_local void @_Z5buildiiii(i32 noundef %0, i32 noundef %1, i32 noundef %2, i32 noundef %3) #0 {
  %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
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  store i32 %0, ptr %5, align 4, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !5
  store i32 %2, ptr %7, align 4, !tbaa !5
  store i32 %3, ptr %8, align 4, !tbaa !5
  %12 = load i32, ptr %7, align 4, !tbaa !5
  %13 = add nsw i32 %12, 1
  %14 = load i32, ptr %8, align 4, !tbaa !5
  %15 = icmp eq i32 %13, %14
  br i1 %15, label %16, label %30

16:                                               ; preds = %4
  %17 = load i32, ptr %5, align 4, !tbaa !5
  %18 = sext i32 %17 to i64
  %19 = getelementptr inbounds [26 x [524288 x %struct.node]], ptr @tree, i64 0, i64 %18
  %20 = load i32, ptr %6, align 4, !tbaa !5
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds [524288 x %struct.node], ptr %19, i64 0, i64 %21
  %23 = load i32, ptr %7, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds [262144 x i32], ptr @a, i64 0, i64 %24
  %26 = load i32, ptr %25, align 4, !tbaa !5
  %27 = load i32, ptr %5, align 4, !tbaa !5
  %28 = icmp eq i32 %26, %27
  %29 = zext i1 %28 to i32
  call void @_ZN4node6assignEi(ptr noundef nonnull align 4 dereferenceable(4) %22, i32 noundef %29)
  br label %65

30:                                               ; preds = %4
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  %31 = load i32, ptr %6, align 4, !tbaa !5
  %32 = shl i32 %31, 1
  store i32 %32, ptr %9, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #3
  %33 = load i32, ptr %9, align 4, !tbaa !5
  %34 = add nsw i32 %33, 1
  store i32 %34, ptr %10, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #3
  %35 = load i32, ptr %7, align 4, !tbaa !5
  %36 = load i32, ptr %8, align 4, !tbaa !5
  %37 = add nsw i32 %35, %36
  %38 = ashr i32 %37, 1
  store i32 %38, ptr %11, align 4, !tbaa !5
  %39 = load i32, ptr %5, align 4, !tbaa !5
  %40 = load i32, ptr %9, align 4, !tbaa !5
  %41 = load i32, ptr %7, align 4, !tbaa !5
  %42 = load i32, ptr %11, align 4, !tbaa !5
  call void @_Z5buildiiii(i32 noundef %39, i32 noundef %40, i32 noundef %41, i32 noundef %42)
  %43 = load i32, ptr %5, align 4, !tbaa !5
  %44 = load i32, ptr %10, align 4, !tbaa !5
  %45 = load i32, ptr %11, align 4, !tbaa !5
  %46 = load i32, ptr %8, align 4, !tbaa !5
  call void @_Z5buildiiii(i32 noundef %43, i32 noundef %44, i32 noundef %45, i32 noundef %46)
  %47 = load i32, ptr %5, align 4, !tbaa !5
  %48 = sext i32 %47 to i64
  %49 = getelementptr inbounds [26 x [524288 x %struct.node]], ptr @tree, i64 0, i64 %48
  %50 = load i32, ptr %6, align 4, !tbaa !5
  %51 = sext i32 %50 to i64
  %52 = getelementptr inbounds [524288 x %struct.node], ptr %49, i64 0, i64 %51
  %53 = load i32, ptr %5, align 4, !tbaa !5
  %54 = sext i32 %53 to i64
  %55 = getelementptr inbounds [26 x [524288 x %struct.node]], ptr @tree, i64 0, i64 %54
  %56 = load i32, ptr %9, align 4, !tbaa !5
  %57 = sext i32 %56 to i64
  %58 = getelementptr inbounds [524288 x %struct.node], ptr %55, i64 0, i64 %57
  %59 = load i32, ptr %5, align 4, !tbaa !5
  %60 = sext i32 %59 to i64
  %61 = getelementptr inbounds [26 x [524288 x %struct.node]], ptr @tree, i64 0, i64 %60
  %62 = load i32, ptr %10, align 4, !tbaa !5
  %63 = sext i32 %62 to i64
  %64 = getelementptr inbounds [524288 x %struct.node], ptr %61, i64 0, i64 %63
  call void @_ZN4node7combineERS_S0_(ptr noundef nonnull align 4 dereferenceable(4) %52, ptr noundef nonnull align 4 dereferenceable(4) %58, ptr noundef nonnull align 4 dereferenceable(4) %64)
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  br label %65

65:                                               ; preds = %30, %16
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN4node6assignEi(ptr noundef nonnull align 4 dereferenceable(4), i32 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 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #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 = !{!"int", !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 { i32 }

@a = external dso_local local_unnamed_addr global [262144 x i32], align 16
@tree = external dso_local global [26 x [524288 x %struct.node]], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z5buildiiii(i32 noundef %0, i32 noundef %1, i32 noundef %2, i32 noundef %3) local_unnamed_addr #0 {
  %5 = add nsw i32 %2, 1
  %6 = icmp eq i32 %5, %3
  br i1 %6, label %common.ret, label %15

common.ret:                                       ; preds = %4
  %7 = sext i32 %0 to i64
  %8 = sext i32 %1 to i64
  %9 = getelementptr inbounds [26 x [524288 x %struct.node]], ptr @tree, i64 0, i64 %7, i64 %8
  %10 = sext i32 %2 to i64
  %11 = getelementptr inbounds [262144 x i32], ptr @a, i64 0, i64 %10
  %12 = load i32, ptr %11, align 4, !tbaa !5
  %13 = icmp eq i32 %12, %0
  %14 = zext i1 %13 to i32
  tail call void @_ZN4node6assignEi(ptr noundef nonnull align 4 dereferenceable(4) %9, i32 noundef %14)
  br label %common.ret24

common.ret24:                                     ; preds = %15, %common.ret
  ret void

15:                                               ; preds = %4
  %16 = shl i32 %1, 1
  %17 = or disjoint i32 %16, 1
  %18 = add nsw i32 %3, %2
  %19 = ashr i32 %18, 1
  tail call void @_Z5buildiiii(i32 noundef %0, i32 noundef %16, i32 noundef %2, i32 noundef %19)
  tail call void @_Z5buildiiii(i32 noundef %0, i32 noundef %17, i32 noundef %19, i32 noundef %3)
  %20 = sext i32 %0 to i64
  %21 = sext i32 %1 to i64
  %22 = getelementptr inbounds [26 x [524288 x %struct.node]], ptr @tree, i64 0, i64 %20, i64 %21
  %23 = sext i32 %16 to i64
  %24 = getelementptr inbounds [26 x [524288 x %struct.node]], ptr @tree, i64 0, i64 %20, i64 %23
  %25 = sext i32 %17 to i64
  %26 = getelementptr inbounds [26 x [524288 x %struct.node]], ptr @tree, i64 0, i64 %20, i64 %25
  tail call void @_ZN4node7combineERS_S0_(ptr noundef nonnull align 4 dereferenceable(4) %22, ptr noundef nonnull align 4 dereferenceable(4) %24, ptr noundef nonnull align 4 dereferenceable(4) %26)
  br label %common.ret24
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN4node6assignEi(ptr noundef nonnull align 4 dereferenceable(4), i32 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN4node7combineERS_S0_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


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