; LLVM IR from Tunghohin/Competitive_Coding :: Luogu/p3919.ll (Z5buildii)

; 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, i32, i32 }

@a = external dso_local global [1000010 x i32], align 16
@tr = external dso_local global [24000240 x %struct.Node], align 16
@idx = external dso_local global i32, align 4

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z5buildii(i32 noundef %0, i32 noundef %1) #0 {
  %3 = alloca i32, align 4
  %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
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  %9 = load i32, ptr @idx, align 4, !tbaa !5
  %10 = add nsw i32 %9, 1
  store i32 %10, ptr @idx, align 4, !tbaa !5
  store i32 %10, ptr %6, align 4, !tbaa !5
  %11 = load i32, ptr %4, align 4, !tbaa !5
  %12 = load i32, ptr %5, align 4, !tbaa !5
  %13 = icmp eq i32 %11, %12
  br i1 %13, label %14, label %24

14:                                               ; preds = %2
  %15 = load i32, ptr %4, align 4, !tbaa !5
  %16 = sext i32 %15 to i64
  %17 = getelementptr inbounds [1000010 x i32], ptr @a, i64 0, i64 %16
  %18 = load i32, ptr %17, align 4, !tbaa !5
  %19 = load i32, ptr %6, align 4, !tbaa !5
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds [24000240 x %struct.Node], ptr @tr, i64 0, i64 %20
  %22 = getelementptr inbounds %struct.Node, ptr %21, i32 0, i32 2
  store i32 %18, ptr %22, align 4, !tbaa !9
  %23 = load i32, ptr %6, align 4, !tbaa !5
  store i32 %23, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %45

24:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  %25 = load i32, ptr %4, align 4, !tbaa !5
  %26 = load i32, ptr %5, align 4, !tbaa !5
  %27 = add nsw i32 %25, %26
  %28 = ashr i32 %27, 1
  store i32 %28, ptr %8, align 4, !tbaa !5
  %29 = load i32, ptr %4, align 4, !tbaa !5
  %30 = load i32, ptr %8, align 4, !tbaa !5
  %31 = call noundef i32 @_Z5buildii(i32 noundef %29, i32 noundef %30)
  %32 = load i32, ptr %6, align 4, !tbaa !5
  %33 = sext i32 %32 to i64
  %34 = getelementptr inbounds [24000240 x %struct.Node], ptr @tr, i64 0, i64 %33
  %35 = getelementptr inbounds %struct.Node, ptr %34, i32 0, i32 0
  store i32 %31, ptr %35, align 4, !tbaa !11
  %36 = load i32, ptr %8, align 4, !tbaa !5
  %37 = add nsw i32 %36, 1
  %38 = load i32, ptr %5, align 4, !tbaa !5
  %39 = call noundef i32 @_Z5buildii(i32 noundef %37, i32 noundef %38)
  %40 = load i32, ptr %6, align 4, !tbaa !5
  %41 = sext i32 %40 to i64
  %42 = getelementptr inbounds [24000240 x %struct.Node], ptr @tr, i64 0, i64 %41
  %43 = getelementptr inbounds %struct.Node, ptr %42, i32 0, i32 1
  store i32 %39, ptr %43, align 4, !tbaa !12
  %44 = load i32, ptr %6, align 4, !tbaa !5
  store i32 %44, ptr %3, align 4
  store i32 1, ptr %7, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  br label %45

45:                                               ; preds = %24, %14
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  %46 = load i32, ptr %3, align 4
  ret i32 %46
}

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

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

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 = { 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, !6, i64 8}
!10 = !{!"_ZTS4Node", !6, i64 0, !6, i64 4, !6, i64 8}
!11 = !{!10, !6, i64 0}
!12 = !{!10, !6, i64 4}


; 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, i32, i32 }

@a = external dso_local local_unnamed_addr global [1000010 x i32], align 16
@tr = external dso_local local_unnamed_addr global [24000240 x %struct.Node], align 16
@idx = external dso_local local_unnamed_addr global i32, align 4

; Function Attrs: mustprogress nofree nosync nounwind memory(readwrite, argmem: none, inaccessiblemem: none) uwtable
define dso_local noundef range(i32 -2147483647, -2147483648) i32 @_Z5buildii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = load i32, ptr @idx, align 4, !tbaa !5
  %4 = add nsw i32 %3, 1
  store i32 %4, ptr @idx, align 4, !tbaa !5
  %5 = icmp eq i32 %0, %1
  %6 = sext i32 %4 to i64
  br i1 %5, label %common.ret, label %11

common.ret:                                       ; preds = %2
  %7 = sext i32 %0 to i64
  %8 = getelementptr inbounds [1000010 x i32], ptr @a, i64 0, i64 %7
  %9 = load i32, ptr %8, align 4, !tbaa !5
  %10 = getelementptr inbounds [24000240 x %struct.Node], ptr @tr, i64 0, i64 %6, i32 2
  store i32 %9, ptr %10, align 4, !tbaa !9
  br label %common.ret16

common.ret16:                                     ; preds = %11, %common.ret
  ret i32 %4

11:                                               ; preds = %2
  %12 = add nsw i32 %1, %0
  %13 = ashr i32 %12, 1
  %14 = tail call noundef i32 @_Z5buildii(i32 noundef %0, i32 noundef %13)
  %15 = getelementptr inbounds [24000240 x %struct.Node], ptr @tr, i64 0, i64 %6
  store i32 %14, ptr %15, align 4, !tbaa !11
  %16 = add nsw i32 %13, 1
  %17 = tail call noundef i32 @_Z5buildii(i32 noundef %16, i32 noundef %1)
  %18 = getelementptr inbounds i8, ptr %15, i64 4
  store i32 %17, ptr %18, align 4, !tbaa !12
  br label %common.ret16
}

attributes #0 = { mustprogress nofree nosync nounwind memory(readwrite, argmem: none, inaccessiblemem: none) 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"}
!9 = !{!10, !6, i64 8}
!10 = !{!"_ZTS4Node", !6, i64 0, !6, i64 4, !6, i64 8}
!11 = !{!10, !6, i64 0}
!12 = !{!10, !6, i64 4}


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