; LLVM IR from JessonYue/LeetCodeLearning :: Array/caiweixiong/c (homework_024)

; 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 }

; 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
declare dso_local ptr @findMiddleElement(ptr noundef) #1

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

9:                                                ; preds = %1
  store ptr null, ptr %2, align 8
  br label %41

10:                                               ; preds = %1
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %11 = load ptr, ptr %3, align 8, !tbaa !5
  %12 = call ptr @findMiddleElement(ptr noundef %11)
  store ptr %12, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  %13 = call noalias ptr @malloc(i64 noundef 24) #4
  store ptr %13, ptr %5, align 8, !tbaa !5
  %14 = load ptr, ptr %4, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct.ListNode, ptr %14, i32 0, i32 0
  %16 = load i32, ptr %15, align 8, !tbaa !9
  %17 = load ptr, ptr %5, align 8, !tbaa !5
  %18 = getelementptr inbounds %struct.TreeNode, ptr %17, i32 0, i32 0
  store i32 %16, ptr %18, align 8, !tbaa !12
  %19 = load ptr, ptr %5, align 8, !tbaa !5
  %20 = getelementptr inbounds %struct.TreeNode, ptr %19, i32 0, i32 2
  store ptr null, ptr %20, align 8, !tbaa !14
  %21 = load ptr, ptr %5, align 8, !tbaa !5
  %22 = getelementptr inbounds %struct.TreeNode, ptr %21, i32 0, i32 1
  store ptr null, ptr %22, align 8, !tbaa !15
  %23 = load ptr, ptr %3, align 8, !tbaa !5
  %24 = load ptr, ptr %4, align 8, !tbaa !5
  %25 = icmp eq ptr %23, %24
  br i1 %25, label %26, label %28

26:                                               ; preds = %10
  %27 = load ptr, ptr %5, align 8, !tbaa !5
  store ptr %27, ptr %2, align 8
  store i32 1, ptr %6, align 4
  br label %40

28:                                               ; preds = %10
  %29 = load ptr, ptr %3, align 8, !tbaa !5
  %30 = call ptr @sortedListToBST(ptr noundef %29)
  %31 = load ptr, ptr %5, align 8, !tbaa !5
  %32 = getelementptr inbounds %struct.TreeNode, ptr %31, i32 0, i32 1
  store ptr %30, ptr %32, align 8, !tbaa !15
  %33 = load ptr, ptr %4, align 8, !tbaa !5
  %34 = getelementptr inbounds %struct.ListNode, ptr %33, i32 0, i32 1
  %35 = load ptr, ptr %34, align 8, !tbaa !16
  %36 = call ptr @sortedListToBST(ptr noundef %35)
  %37 = load ptr, ptr %5, align 8, !tbaa !5
  %38 = getelementptr inbounds %struct.TreeNode, ptr %37, i32 0, i32 2
  store ptr %36, ptr %38, align 8, !tbaa !14
  %39 = load ptr, ptr %5, align 8, !tbaa !5
  store ptr %39, ptr %2, align 8
  store i32 1, ptr %6, align 4
  br label %40

40:                                               ; preds = %28, %26
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  br label %41

41:                                               ; preds = %40, %9
  %42 = load ptr, ptr %2, 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 = !{!"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 16}
!15 = !{!13, !6, i64 8}
!16 = !{!10, !6, i64 8}


; 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"

; Function Attrs: nounwind uwtable
declare dso_local ptr @findMiddleElement(ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local noalias noundef ptr @sortedListToBST(ptr noundef %0) local_unnamed_addr #0 {
  %.not = icmp eq ptr %0, null
  br i1 %.not, label %common.ret16, label %2

2:                                                ; preds = %1
  %3 = tail call ptr @findMiddleElement(ptr noundef nonnull %0)
  %4 = tail call noalias dereferenceable_or_null(24) ptr @malloc(i64 noundef 24) #3
  %5 = load i32, ptr %3, align 8, !tbaa !5
  store i32 %5, ptr %4, align 8, !tbaa !11
  %6 = getelementptr inbounds i8, ptr %4, i64 8
  %7 = icmp eq ptr %3, %0
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(16) %6, i8 0, i64 16, i1 false)
  br i1 %7, label %common.ret16, label %8

common.ret16:                                     ; preds = %2, %1, %8
  %common.ret16.op = phi ptr [ %4, %8 ], [ null, %1 ], [ %4, %2 ]
  ret ptr %common.ret16.op

8:                                                ; preds = %2
  %9 = getelementptr inbounds i8, ptr %4, i64 16
  %10 = tail call ptr @sortedListToBST(ptr noundef nonnull %0)
  store ptr %10, ptr %6, align 8, !tbaa !13
  %11 = getelementptr inbounds i8, ptr %3, i64 8
  %12 = load ptr, ptr %11, align 8, !tbaa !14
  %13 = tail call ptr @sortedListToBST(ptr noundef %12)
  store ptr %13, ptr %9, align 8, !tbaa !15
  br label %common.ret16
}

; 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

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

attributes #0 = { 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 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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #3 = { 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, !7, i64 0}
!6 = !{!"ListNode", !7, i64 0, !10, i64 8}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!12, !7, i64 0}
!12 = !{!"TreeNode", !7, i64 0, !10, i64 8, !10, i64 16}
!13 = !{!12, !10, i64 8}
!14 = !{!6, !10, i64 8}
!15 = !{!12, !10, i64 16}


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