; LLVM IR from lzyrapx/Competitive-Programming :: LibreOJ/105（Splay）.ll (ZN9SplayTree5buildERiiii)

; 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"

@a = external dso_local global [100010 x i32], align 16
@_ZN9SplayTree2chE = external dso_local global [100010 x [2 x i32]], align 16

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN9SplayTree7newnodeERiii(ptr noundef nonnull align 4 dereferenceable(4), i32 noundef, i32 noundef) #0

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN9SplayTree6pushupEi(i32 noundef) #1

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

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

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN9SplayTree5buildERiiii(ptr noundef nonnull align 4 dereferenceable(4) %0, i32 noundef %1, i32 noundef %2, i32 noundef %3) #1 {
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !9
  store i32 %2, ptr %7, align 4, !tbaa !9
  store i32 %3, ptr %8, align 4, !tbaa !9
  %10 = load i32, ptr %6, align 4, !tbaa !9
  %11 = load i32, ptr %7, align 4, !tbaa !9
  %12 = icmp sgt i32 %10, %11
  br i1 %12, label %13, label %14

13:                                               ; preds = %4
  br label %47

14:                                               ; preds = %4
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  %15 = load i32, ptr %6, align 4, !tbaa !9
  %16 = load i32, ptr %7, align 4, !tbaa !9
  %17 = add nsw i32 %15, %16
  %18 = sdiv i32 %17, 2
  store i32 %18, ptr %9, align 4, !tbaa !9
  %19 = load ptr, ptr %5, align 8, !tbaa !5
  %20 = load i32, ptr %8, align 4, !tbaa !9
  %21 = load i32, ptr %9, align 4, !tbaa !9
  %22 = sext i32 %21 to i64
  %23 = getelementptr inbounds [100010 x i32], ptr @a, i64 0, i64 %22
  %24 = load i32, ptr %23, align 4, !tbaa !9
  call void @_ZN9SplayTree7newnodeERiii(ptr noundef nonnull align 4 dereferenceable(4) %19, i32 noundef %20, i32 noundef %24)
  %25 = load ptr, ptr %5, align 8, !tbaa !5
  %26 = load i32, ptr %25, align 4, !tbaa !9
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds [100010 x [2 x i32]], ptr @_ZN9SplayTree2chE, i64 0, i64 %27
  %29 = getelementptr inbounds [2 x i32], ptr %28, i64 0, i64 0
  %30 = load i32, ptr %6, align 4, !tbaa !9
  %31 = load i32, ptr %9, align 4, !tbaa !9
  %32 = sub nsw i32 %31, 1
  %33 = load ptr, ptr %5, align 8, !tbaa !5
  %34 = load i32, ptr %33, align 4, !tbaa !9
  call void @_ZN9SplayTree5buildERiiii(ptr noundef nonnull align 4 dereferenceable(4) %29, i32 noundef %30, i32 noundef %32, i32 noundef %34)
  %35 = load ptr, ptr %5, align 8, !tbaa !5
  %36 = load i32, ptr %35, align 4, !tbaa !9
  %37 = sext i32 %36 to i64
  %38 = getelementptr inbounds [100010 x [2 x i32]], ptr @_ZN9SplayTree2chE, i64 0, i64 %37
  %39 = getelementptr inbounds [2 x i32], ptr %38, i64 0, i64 1
  %40 = load i32, ptr %9, align 4, !tbaa !9
  %41 = add nsw i32 %40, 1
  %42 = load i32, ptr %7, align 4, !tbaa !9
  %43 = load ptr, ptr %5, align 8, !tbaa !5
  %44 = load i32, ptr %43, align 4, !tbaa !9
  call void @_ZN9SplayTree5buildERiiii(ptr noundef nonnull align 4 dereferenceable(4) %39, i32 noundef %41, i32 noundef %42, i32 noundef %44)
  %45 = load ptr, ptr %5, align 8, !tbaa !5
  %46 = load i32, ptr %45, align 4, !tbaa !9
  call void @_ZN9SplayTree6pushupEi(i32 noundef %46)
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  br label %47

47:                                               ; preds = %14, %13
  ret void
}

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" }
attributes #1 = { 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 #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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !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"

@a = external dso_local local_unnamed_addr global [100010 x i32], align 16
@_ZN9SplayTree2chE = external dso_local global [100010 x [2 x i32]], align 16

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN9SplayTree7newnodeERiii(ptr noundef nonnull align 4 dereferenceable(4), i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN9SplayTree6pushupEi(i32 noundef) local_unnamed_addr #1

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN9SplayTree5buildERiiii(ptr noundef nonnull align 4 dereferenceable(4) %0, i32 noundef %1, i32 noundef %2, i32 noundef %3) local_unnamed_addr #1 {
  %5 = icmp sgt i32 %1, %2
  br i1 %5, label %common.ret16, label %6

common.ret16:                                     ; preds = %4, %6
  ret void

6:                                                ; preds = %4
  %7 = add nsw i32 %2, %1
  %8 = sdiv i32 %7, 2
  %9 = sext i32 %8 to i64
  %10 = getelementptr inbounds [100010 x i32], ptr @a, i64 0, i64 %9
  %11 = load i32, ptr %10, align 4, !tbaa !5
  tail call void @_ZN9SplayTree7newnodeERiii(ptr noundef nonnull align 4 dereferenceable(4) %0, i32 noundef %3, i32 noundef %11)
  %12 = load i32, ptr %0, align 4, !tbaa !5
  %13 = sext i32 %12 to i64
  %14 = getelementptr inbounds [100010 x [2 x i32]], ptr @_ZN9SplayTree2chE, i64 0, i64 %13
  %15 = add nsw i32 %8, -1
  tail call void @_ZN9SplayTree5buildERiiii(ptr noundef nonnull align 4 dereferenceable(4) %14, i32 noundef %1, i32 noundef %15, i32 noundef %12)
  %16 = load i32, ptr %0, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [100010 x [2 x i32]], ptr @_ZN9SplayTree2chE, i64 0, i64 %17, i64 1
  %19 = add nsw i32 %8, 1
  tail call void @_ZN9SplayTree5buildERiiii(ptr noundef nonnull align 4 dereferenceable(4) %18, i32 noundef %19, i32 noundef %2, i32 noundef %16)
  %20 = load i32, ptr %0, align 4, !tbaa !5
  tail call void @_ZN9SplayTree6pushupEi(i32 noundef %20)
  br label %common.ret16
}

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" }
attributes #1 = { 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" }

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