; LLVM IR from JessonYue/LeetCodeLearning :: Array/fanbei/0702/c (solution07_02)

; 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.ListNode = type { i32, ptr }
%struct.TreeNode = type { i32, ptr, ptr }

@tmpHead = external dso_local global ptr, align 8

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

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

12:                                               ; preds = %2
  store ptr null, ptr %3, align 8
  br label %41

13:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  %14 = load i32, ptr %4, align 4, !tbaa !5
  %15 = load i32, ptr %5, align 4, !tbaa !5
  %16 = add nsw i32 %14, %15
  %17 = sdiv i32 %16, 2
  store i32 %17, ptr %6, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %18 = load i32, ptr %4, align 4, !tbaa !5
  %19 = load i32, ptr %6, align 4, !tbaa !5
  %20 = sub nsw i32 %19, 1
  %21 = call ptr @convertListToBST(i32 noundef %18, i32 noundef %20)
  store ptr %21, ptr %7, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %22 = call noalias ptr @malloc(i64 noundef 24) #4
  store ptr %22, ptr %8, align 8, !tbaa !9
  %23 = load ptr, ptr @tmpHead, align 8, !tbaa !9
  %24 = getelementptr inbounds %struct.ListNode, ptr %23, i32 0, i32 0
  %25 = load i32, ptr %24, align 8, !tbaa !11
  %26 = load ptr, ptr %8, align 8, !tbaa !9
  %27 = getelementptr inbounds %struct.TreeNode, ptr %26, i32 0, i32 0
  store i32 %25, ptr %27, align 8, !tbaa !13
  %28 = load ptr, ptr %7, align 8, !tbaa !9
  %29 = load ptr, ptr %8, align 8, !tbaa !9
  %30 = getelementptr inbounds %struct.TreeNode, ptr %29, i32 0, i32 1
  store ptr %28, ptr %30, align 8, !tbaa !15
  %31 = load ptr, ptr @tmpHead, align 8, !tbaa !9
  %32 = getelementptr inbounds %struct.ListNode, ptr %31, i32 0, i32 1
  %33 = load ptr, ptr %32, align 8, !tbaa !16
  store ptr %33, ptr @tmpHead, align 8, !tbaa !9
  %34 = load i32, ptr %6, align 4, !tbaa !5
  %35 = add nsw i32 %34, 1
  %36 = load i32, ptr %5, align 4, !tbaa !5
  %37 = call ptr @convertListToBST(i32 noundef %35, i32 noundef %36)
  %38 = load ptr, ptr %8, align 8, !tbaa !9
  %39 = getelementptr inbounds %struct.TreeNode, ptr %38, i32 0, i32 2
  store ptr %37, ptr %39, align 8, !tbaa !17
  %40 = load ptr, ptr %8, align 8, !tbaa !9
  store ptr %40, ptr %3, align 8
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  br label %41

41:                                               ; preds = %13, %12
  %42 = load ptr, ptr %3, align 8
  ret ptr %42
}

; Function Attrs: nounwind allocsize(0)
declare noalias ptr @malloc(i64 noundef) #2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 = { nounwind allocsize(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 #3 = { nounwind }
attributes #4 = { nounwind allocsize(0) }

!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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !6, i64 0}
!12 = !{!"ListNode", !6, i64 0, !10, i64 8}
!13 = !{!14, !6, i64 0}
!14 = !{!"TreeNode", !6, i64 0, !10, i64 8, !10, i64 16}
!15 = !{!14, !10, i64 8}
!16 = !{!12, !10, i64 8}
!17 = !{!14, !10, i64 16}


; 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"

@tmpHead = external dso_local local_unnamed_addr global ptr, align 8

; Function Attrs: nofree nounwind memory(readwrite, argmem: read) uwtable
define dso_local noalias noundef ptr @convertListToBST(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp sgt i32 %0, %1
  br i1 %3, label %common.ret15, label %4

common.ret15:                                     ; preds = %2, %4
  %common.ret15.op = phi ptr [ %9, %4 ], [ null, %2 ]
  ret ptr %common.ret15.op

4:                                                ; preds = %2
  %5 = add nsw i32 %1, %0
  %6 = sdiv i32 %5, 2
  %7 = add nsw i32 %6, -1
  %8 = tail call ptr @convertListToBST(i32 noundef %0, i32 noundef %7)
  %9 = tail call noalias dereferenceable_or_null(24) ptr @malloc(i64 noundef 24) #2
  %10 = load ptr, ptr @tmpHead, align 8, !tbaa !5
  %11 = load i32, ptr %10, align 8, !tbaa !9
  store i32 %11, ptr %9, align 8, !tbaa !12
  %12 = getelementptr inbounds i8, ptr %9, i64 8
  store ptr %8, ptr %12, align 8, !tbaa !14
  %13 = getelementptr inbounds i8, ptr %10, i64 8
  %14 = load ptr, ptr %13, align 8, !tbaa !15
  store ptr %14, ptr @tmpHead, align 8, !tbaa !5
  %15 = add nsw i32 %6, 1
  %16 = tail call ptr @convertListToBST(i32 noundef %15, i32 noundef %1)
  %17 = getelementptr inbounds i8, ptr %9, i64 16
  store ptr %16, ptr %17, align 8, !tbaa !16
  br label %common.ret15
}

; Function Attrs: mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @malloc(i64 noundef) local_unnamed_addr #1

attributes #0 = { nofree nounwind memory(readwrite, argmem: read) 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 nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite) "alloc-family"="malloc" "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 = { nounwind allocsize(0) }

!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/C++ TBAA"}
!9 = !{!10, !11, i64 0}
!10 = !{!"ListNode", !11, i64 0, !6, i64 8}
!11 = !{!"int", !7, i64 0}
!12 = !{!13, !11, i64 0}
!13 = !{!"TreeNode", !11, i64 0, !6, i64 8, !6, i64 16}
!14 = !{!13, !6, i64 8}
!15 = !{!10, !6, i64 8}
!16 = !{!13, !6, i64 16}


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