; LLVM IR from ImChong/Practice_LeetCode_C :: F01_Common_Functions/src (common_binary_tree)

; 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.TreeLkListQueue = type { ptr, i32 }
%struct.TreeLkListNode = type { 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: nounwind allocsize(0)
declare noalias ptr @malloc(i64 noundef) #1

; 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 void @BTree_EnListQueue(ptr noundef %0, ptr noundef %1) #2 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  %6 = load ptr, ptr %3, align 8, !tbaa !5
  %7 = getelementptr inbounds %struct.TreeLkListQueue, ptr %6, i32 0, i32 0
  %8 = load ptr, ptr %7, align 8, !tbaa !9
  %9 = icmp eq ptr %8, null
  br i1 %9, label %10, label %27

10:                                               ; preds = %2
  %11 = call noalias ptr @malloc(i64 noundef 16) #3
  %12 = load ptr, ptr %3, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct.TreeLkListQueue, ptr %12, i32 0, i32 0
  store ptr %11, ptr %13, align 8, !tbaa !9
  %14 = load ptr, ptr %4, align 8, !tbaa !5
  %15 = load ptr, ptr %3, align 8, !tbaa !5
  %16 = getelementptr inbounds %struct.TreeLkListQueue, ptr %15, i32 0, i32 0
  %17 = load ptr, ptr %16, align 8, !tbaa !9
  %18 = getelementptr inbounds %struct.TreeLkListNode, ptr %17, i32 0, i32 0
  store ptr %14, ptr %18, align 8, !tbaa !12
  %19 = load ptr, ptr %3, align 8, !tbaa !5
  %20 = getelementptr inbounds %struct.TreeLkListQueue, ptr %19, i32 0, i32 0
  %21 = load ptr, ptr %20, align 8, !tbaa !9
  %22 = getelementptr inbounds %struct.TreeLkListNode, ptr %21, i32 0, i32 1
  store ptr null, ptr %22, align 8, !tbaa !14
  %23 = load ptr, ptr %3, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.TreeLkListQueue, ptr %23, i32 0, i32 1
  %25 = load i32, ptr %24, align 8, !tbaa !15
  %26 = add nsw i32 %25, 1
  store i32 %26, ptr %24, align 8, !tbaa !15
  br label %57

27:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #4
  %28 = load ptr, ptr %3, align 8, !tbaa !5
  %29 = getelementptr inbounds %struct.TreeLkListQueue, ptr %28, i32 0, i32 0
  %30 = load ptr, ptr %29, align 8, !tbaa !9
  store ptr %30, ptr %5, align 8, !tbaa !5
  br label %31

31:                                               ; preds = %36, %27
  %32 = load ptr, ptr %5, align 8, !tbaa !5
  %33 = getelementptr inbounds %struct.TreeLkListNode, ptr %32, i32 0, i32 1
  %34 = load ptr, ptr %33, align 8, !tbaa !14
  %35 = icmp ne ptr %34, null
  br i1 %35, label %36, label %40

36:                                               ; preds = %31
  %37 = load ptr, ptr %5, align 8, !tbaa !5
  %38 = getelementptr inbounds %struct.TreeLkListNode, ptr %37, i32 0, i32 1
  %39 = load ptr, ptr %38, align 8, !tbaa !14
  store ptr %39, ptr %5, align 8, !tbaa !5
  br label %31, !llvm.loop !16

40:                                               ; preds = %31
  %41 = call noalias ptr @malloc(i64 noundef 16) #3
  %42 = load ptr, ptr %5, align 8, !tbaa !5
  %43 = getelementptr inbounds %struct.TreeLkListNode, ptr %42, i32 0, i32 1
  store ptr %41, ptr %43, align 8, !tbaa !14
  %44 = load ptr, ptr %4, align 8, !tbaa !5
  %45 = load ptr, ptr %5, align 8, !tbaa !5
  %46 = getelementptr inbounds %struct.TreeLkListNode, ptr %45, i32 0, i32 1
  %47 = load ptr, ptr %46, align 8, !tbaa !14
  %48 = getelementptr inbounds %struct.TreeLkListNode, ptr %47, i32 0, i32 0
  store ptr %44, ptr %48, align 8, !tbaa !12
  %49 = load ptr, ptr %5, align 8, !tbaa !5
  %50 = getelementptr inbounds %struct.TreeLkListNode, ptr %49, i32 0, i32 1
  %51 = load ptr, ptr %50, align 8, !tbaa !14
  %52 = getelementptr inbounds %struct.TreeLkListNode, ptr %51, i32 0, i32 1
  store ptr null, ptr %52, align 8, !tbaa !14
  %53 = load ptr, ptr %3, align 8, !tbaa !5
  %54 = getelementptr inbounds %struct.TreeLkListQueue, ptr %53, i32 0, i32 1
  %55 = load i32, ptr %54, align 8, !tbaa !15
  %56 = add nsw i32 %55, 1
  store i32 %56, ptr %54, align 8, !tbaa !15
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #4
  br label %57

57:                                               ; preds = %40, %10
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { 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 #3 = { nounwind allocsize(0) }
attributes #4 = { 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/C++ TBAA"}
!9 = !{!10, !6, i64 0}
!10 = !{!"", !6, i64 0, !11, i64 8}
!11 = !{!"int", !7, i64 0}
!12 = !{!13, !6, i64 0}
!13 = !{!"TreeLkListNode", !6, i64 0, !6, i64 8}
!14 = !{!13, !6, i64 8}
!15 = !{!10, !11, i64 8}
!16 = distinct !{!16, !17}
!17 = !{!"llvm.loop.mustprogress"}


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

; Function Attrs: nofree nounwind uwtable
define dso_local void @BTree_EnListQueue(ptr nocapture noundef %0, ptr noundef %1) local_unnamed_addr #1 {
  %3 = load ptr, ptr %0, align 8, !tbaa !5
  %4 = icmp eq ptr %3, null
  br i1 %4, label %9, label %.preheader

.preheader:                                       ; preds = %2, %.preheader
  %.0 = phi ptr [ %6, %.preheader ], [ %3, %2 ]
  %5 = getelementptr inbounds i8, ptr %.0, i64 8
  %6 = load ptr, ptr %5, align 8, !tbaa !11
  %.not = icmp eq ptr %6, null
  br i1 %.not, label %7, label %.preheader, !llvm.loop !13

7:                                                ; preds = %.preheader
  %8 = getelementptr inbounds i8, ptr %.0, i64 8
  br label %9

9:                                                ; preds = %2, %7
  %.sink20 = phi ptr [ %8, %7 ], [ %0, %2 ]
  %10 = tail call noalias dereferenceable_or_null(16) ptr @malloc(i64 noundef 16) #2
  store ptr %10, ptr %.sink20, align 8, !tbaa !15
  store ptr %1, ptr %10, align 8, !tbaa !16
  %11 = getelementptr inbounds i8, ptr %10, i64 8
  store ptr null, ptr %11, align 8, !tbaa !11
  %12 = getelementptr inbounds i8, ptr %0, i64 8
  %13 = load i32, ptr %12, align 8, !tbaa !17
  %14 = add nsw i32 %13, 1
  store i32 %14, ptr %12, align 8, !tbaa !17
  ret void
}

attributes #0 = { 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 #1 = { nofree 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) }

!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 = !{!"", !7, i64 0, !10, i64 8}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!12, !7, i64 8}
!12 = !{!"TreeLkListNode", !7, i64 0, !7, i64 8}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}
!15 = !{!7, !7, i64 0}
!16 = !{!12, !7, i64 0}
!17 = !{!6, !10, i64 8}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LICMPass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass