; LLVM IR from begeekmyfriend/leetcode :: 0114_flatten_binary_tree_to_linked_list (flatten)

; 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.TreeNode = type { i32, ptr, ptr }

@.str = external hidden unnamed_addr constant [4 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca %struct.TreeNode, align 8
  %3 = alloca [2 x %struct.TreeNode], align 16
  %4 = alloca [4 x %struct.TreeNode], align 16
  %5 = alloca [8 x %struct.TreeNode], align 16
  %6 = alloca ptr, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 24, ptr %2) #3
  call void @llvm.lifetime.start.p0(i64 48, ptr %3) #3
  call void @llvm.lifetime.start.p0(i64 96, ptr %4) #3
  call void @llvm.lifetime.start.p0(i64 192, ptr %5) #3
  %7 = getelementptr inbounds %struct.TreeNode, ptr %2, i32 0, i32 0
  store i32 5, ptr %7, align 8, !tbaa !5
  %8 = getelementptr inbounds [2 x %struct.TreeNode], ptr %3, i64 0, i64 0
  %9 = getelementptr inbounds %struct.TreeNode, ptr %8, i32 0, i32 0
  store i32 4, ptr %9, align 16, !tbaa !5
  %10 = getelementptr inbounds [2 x %struct.TreeNode], ptr %3, i64 0, i64 1
  %11 = getelementptr inbounds %struct.TreeNode, ptr %10, i32 0, i32 0
  store i32 8, ptr %11, align 8, !tbaa !5
  %12 = getelementptr inbounds [4 x %struct.TreeNode], ptr %4, i64 0, i64 0
  %13 = getelementptr inbounds %struct.TreeNode, ptr %12, i32 0, i32 0
  store i32 11, ptr %13, align 16, !tbaa !5
  %14 = getelementptr inbounds [4 x %struct.TreeNode], ptr %4, i64 0, i64 2
  %15 = getelementptr inbounds %struct.TreeNode, ptr %14, i32 0, i32 0
  store i32 13, ptr %15, align 16, !tbaa !5
  %16 = getelementptr inbounds [4 x %struct.TreeNode], ptr %4, i64 0, i64 3
  %17 = getelementptr inbounds %struct.TreeNode, ptr %16, i32 0, i32 0
  store i32 4, ptr %17, align 8, !tbaa !5
  %18 = getelementptr inbounds [8 x %struct.TreeNode], ptr %5, i64 0, i64 0
  %19 = getelementptr inbounds %struct.TreeNode, ptr %18, i32 0, i32 0
  store i32 7, ptr %19, align 16, !tbaa !5
  %20 = getelementptr inbounds [8 x %struct.TreeNode], ptr %5, i64 0, i64 1
  %21 = getelementptr inbounds %struct.TreeNode, ptr %20, i32 0, i32 0
  store i32 2, ptr %21, align 8, !tbaa !5
  %22 = getelementptr inbounds [8 x %struct.TreeNode], ptr %5, i64 0, i64 6
  %23 = getelementptr inbounds %struct.TreeNode, ptr %22, i32 0, i32 0
  store i32 5, ptr %23, align 16, !tbaa !5
  %24 = getelementptr inbounds [8 x %struct.TreeNode], ptr %5, i64 0, i64 7
  %25 = getelementptr inbounds %struct.TreeNode, ptr %24, i32 0, i32 0
  store i32 1, ptr %25, align 8, !tbaa !5
  %26 = getelementptr inbounds [2 x %struct.TreeNode], ptr %3, i64 0, i64 0
  %27 = getelementptr inbounds %struct.TreeNode, ptr %2, i32 0, i32 1
  store ptr %26, ptr %27, align 8, !tbaa !11
  %28 = getelementptr inbounds [2 x %struct.TreeNode], ptr %3, i64 0, i64 1
  %29 = getelementptr inbounds %struct.TreeNode, ptr %2, i32 0, i32 2
  store ptr %28, ptr %29, align 8, !tbaa !12
  %30 = getelementptr inbounds [4 x %struct.TreeNode], ptr %4, i64 0, i64 0
  %31 = getelementptr inbounds [2 x %struct.TreeNode], ptr %3, i64 0, i64 0
  %32 = getelementptr inbounds %struct.TreeNode, ptr %31, i32 0, i32 1
  store ptr %30, ptr %32, align 8, !tbaa !11
  %33 = getelementptr inbounds [2 x %struct.TreeNode], ptr %3, i64 0, i64 0
  %34 = getelementptr inbounds %struct.TreeNode, ptr %33, i32 0, i32 2
  store ptr null, ptr %34, align 16, !tbaa !12
  %35 = getelementptr inbounds [4 x %struct.TreeNode], ptr %4, i64 0, i64 2
  %36 = getelementptr inbounds [2 x %struct.TreeNode], ptr %3, i64 0, i64 1
  %37 = getelementptr inbounds %struct.TreeNode, ptr %36, i32 0, i32 1
  store ptr %35, ptr %37, align 8, !tbaa !11
  %38 = getelementptr inbounds [4 x %struct.TreeNode], ptr %4, i64 0, i64 3
  %39 = getelementptr inbounds [2 x %struct.TreeNode], ptr %3, i64 0, i64 1
  %40 = getelementptr inbounds %struct.TreeNode, ptr %39, i32 0, i32 2
  store ptr %38, ptr %40, align 8, !tbaa !12
  %41 = getelementptr inbounds [8 x %struct.TreeNode], ptr %5, i64 0, i64 0
  %42 = getelementptr inbounds [4 x %struct.TreeNode], ptr %4, i64 0, i64 0
  %43 = getelementptr inbounds %struct.TreeNode, ptr %42, i32 0, i32 1
  store ptr %41, ptr %43, align 8, !tbaa !11
  %44 = getelementptr inbounds [8 x %struct.TreeNode], ptr %5, i64 0, i64 1
  %45 = getelementptr inbounds [4 x %struct.TreeNode], ptr %4, i64 0, i64 0
  %46 = getelementptr inbounds %struct.TreeNode, ptr %45, i32 0, i32 2
  store ptr %44, ptr %46, align 16, !tbaa !12
  %47 = getelementptr inbounds [4 x %struct.TreeNode], ptr %4, i64 0, i64 2
  %48 = getelementptr inbounds %struct.TreeNode, ptr %47, i32 0, i32 1
  store ptr null, ptr %48, align 8, !tbaa !11
  %49 = getelementptr inbounds [4 x %struct.TreeNode], ptr %4, i64 0, i64 2
  %50 = getelementptr inbounds %struct.TreeNode, ptr %49, i32 0, i32 2
  store ptr null, ptr %50, align 16, !tbaa !12
  %51 = getelementptr inbounds [8 x %struct.TreeNode], ptr %5, i64 0, i64 6
  %52 = getelementptr inbounds [4 x %struct.TreeNode], ptr %4, i64 0, i64 3
  %53 = getelementptr inbounds %struct.TreeNode, ptr %52, i32 0, i32 1
  store ptr %51, ptr %53, align 8, !tbaa !11
  %54 = getelementptr inbounds [8 x %struct.TreeNode], ptr %5, i64 0, i64 7
  %55 = getelementptr inbounds [4 x %struct.TreeNode], ptr %4, i64 0, i64 3
  %56 = getelementptr inbounds %struct.TreeNode, ptr %55, i32 0, i32 2
  store ptr %54, ptr %56, align 8, !tbaa !12
  %57 = getelementptr inbounds [8 x %struct.TreeNode], ptr %5, i64 0, i64 0
  %58 = getelementptr inbounds %struct.TreeNode, ptr %57, i32 0, i32 1
  store ptr null, ptr %58, align 8, !tbaa !11
  %59 = getelementptr inbounds [8 x %struct.TreeNode], ptr %5, i64 0, i64 0
  %60 = getelementptr inbounds %struct.TreeNode, ptr %59, i32 0, i32 2
  store ptr null, ptr %60, align 16, !tbaa !12
  %61 = getelementptr inbounds [8 x %struct.TreeNode], ptr %5, i64 0, i64 1
  %62 = getelementptr inbounds %struct.TreeNode, ptr %61, i32 0, i32 1
  store ptr null, ptr %62, align 8, !tbaa !11
  %63 = getelementptr inbounds [8 x %struct.TreeNode], ptr %5, i64 0, i64 1
  %64 = getelementptr inbounds %struct.TreeNode, ptr %63, i32 0, i32 2
  store ptr null, ptr %64, align 8, !tbaa !12
  %65 = getelementptr inbounds [8 x %struct.TreeNode], ptr %5, i64 0, i64 6
  %66 = getelementptr inbounds %struct.TreeNode, ptr %65, i32 0, i32 1
  store ptr null, ptr %66, align 8, !tbaa !11
  %67 = getelementptr inbounds [8 x %struct.TreeNode], ptr %5, i64 0, i64 6
  %68 = getelementptr inbounds %struct.TreeNode, ptr %67, i32 0, i32 2
  store ptr null, ptr %68, align 16, !tbaa !12
  %69 = getelementptr inbounds [8 x %struct.TreeNode], ptr %5, i64 0, i64 7
  %70 = getelementptr inbounds %struct.TreeNode, ptr %69, i32 0, i32 1
  store ptr null, ptr %70, align 8, !tbaa !11
  %71 = getelementptr inbounds [8 x %struct.TreeNode], ptr %5, i64 0, i64 7
  %72 = getelementptr inbounds %struct.TreeNode, ptr %71, i32 0, i32 2
  store ptr null, ptr %72, align 8, !tbaa !12
  call void @flatten(ptr noundef %2)
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  store ptr %2, ptr %6, align 8, !tbaa !13
  br label %73

73:                                               ; preds = %81, %0
  %74 = load ptr, ptr %6, align 8, !tbaa !13
  %75 = icmp ne ptr %74, null
  br i1 %75, label %76, label %85

76:                                               ; preds = %73
  %77 = load ptr, ptr %6, align 8, !tbaa !13
  %78 = getelementptr inbounds %struct.TreeNode, ptr %77, i32 0, i32 0
  %79 = load i32, ptr %78, align 8, !tbaa !5
  %80 = call i32 (ptr, ...) @printf(ptr noundef @.str, i32 noundef %79)
  br label %81

81:                                               ; preds = %76
  %82 = load ptr, ptr %6, align 8, !tbaa !13
  %83 = getelementptr inbounds %struct.TreeNode, ptr %82, i32 0, i32 2
  %84 = load ptr, ptr %83, align 8, !tbaa !12
  store ptr %84, ptr %6, align 8, !tbaa !13
  br label %73, !llvm.loop !14

85:                                               ; preds = %73
  %86 = call i32 (ptr, ...) @printf(ptr noundef @.str.1)
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 192, ptr %5) #3
  call void @llvm.lifetime.end.p0(i64 96, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 48, ptr %3) #3
  call void @llvm.lifetime.end.p0(i64 24, ptr %2) #3
  ret i32 0
}

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

; Function Attrs: nounwind uwtable
declare hidden void @flatten(ptr noundef) #0

declare i32 @printf(ptr noundef, ...) #2

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

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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { "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 }

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

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

@.str = external hidden unnamed_addr constant [4 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca %struct.TreeNode, align 8
  %2 = alloca [2 x %struct.TreeNode], align 16
  %3 = alloca [4 x %struct.TreeNode], align 16
  %4 = alloca [8 x %struct.TreeNode], align 16
  call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %1) #4
  call void @llvm.lifetime.start.p0(i64 48, ptr nonnull %2) #4
  call void @llvm.lifetime.start.p0(i64 96, ptr nonnull %3) #4
  call void @llvm.lifetime.start.p0(i64 192, ptr nonnull %4) #4
  store i32 5, ptr %1, align 8, !tbaa !5
  store i32 4, ptr %2, align 16, !tbaa !5
  %5 = getelementptr inbounds i8, ptr %2, i64 24
  store i32 8, ptr %5, align 8, !tbaa !5
  store i32 11, ptr %3, align 16, !tbaa !5
  %6 = getelementptr inbounds i8, ptr %3, i64 48
  store i32 13, ptr %6, align 16, !tbaa !5
  %7 = getelementptr inbounds i8, ptr %3, i64 72
  store i32 4, ptr %7, align 8, !tbaa !5
  store i32 7, ptr %4, align 16, !tbaa !5
  %8 = getelementptr inbounds i8, ptr %4, i64 24
  store i32 2, ptr %8, align 8, !tbaa !5
  %9 = getelementptr inbounds i8, ptr %4, i64 144
  store i32 5, ptr %9, align 16, !tbaa !5
  %10 = getelementptr inbounds i8, ptr %4, i64 168
  store i32 1, ptr %10, align 8, !tbaa !5
  %11 = getelementptr inbounds i8, ptr %1, i64 8
  store ptr %2, ptr %11, align 8, !tbaa !11
  %12 = getelementptr inbounds i8, ptr %1, i64 16
  store ptr %5, ptr %12, align 8, !tbaa !12
  %13 = getelementptr inbounds i8, ptr %2, i64 8
  store ptr %3, ptr %13, align 8, !tbaa !11
  %14 = getelementptr inbounds i8, ptr %2, i64 16
  store ptr null, ptr %14, align 16, !tbaa !12
  %15 = getelementptr inbounds i8, ptr %2, i64 32
  store ptr %6, ptr %15, align 16, !tbaa !11
  %16 = getelementptr inbounds i8, ptr %2, i64 40
  store ptr %7, ptr %16, align 8, !tbaa !12
  %17 = getelementptr inbounds i8, ptr %3, i64 8
  store ptr %4, ptr %17, align 8, !tbaa !11
  %18 = getelementptr inbounds i8, ptr %3, i64 16
  store ptr %8, ptr %18, align 16, !tbaa !12
  %19 = getelementptr inbounds i8, ptr %3, i64 56
  %20 = getelementptr inbounds i8, ptr %3, i64 80
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(16) %19, i8 0, i64 16, i1 false)
  store ptr %9, ptr %20, align 16, !tbaa !11
  %21 = getelementptr inbounds i8, ptr %3, i64 88
  store ptr %10, ptr %21, align 8, !tbaa !12
  %22 = getelementptr inbounds i8, ptr %4, i64 8
  %23 = getelementptr inbounds i8, ptr %4, i64 32
  %24 = getelementptr inbounds i8, ptr %4, i64 152
  %25 = getelementptr inbounds i8, ptr %4, i64 176
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(16) %22, i8 0, i64 16, i1 false)
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(16) %23, i8 0, i64 16, i1 false)
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(16) %24, i8 0, i64 16, i1 false)
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(16) %25, i8 0, i64 16, i1 false)
  call void @flatten(ptr noundef nonnull %1)
  br label %26

26:                                               ; preds = %0, %26
  %.03 = phi ptr [ %1, %0 ], [ %30, %26 ]
  %27 = load i32, ptr %.03, align 8, !tbaa !5
  %28 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, i32 noundef %27)
  %29 = getelementptr inbounds i8, ptr %.03, i64 16
  %30 = load ptr, ptr %29, align 8, !tbaa !12
  %.not = icmp eq ptr %30, null
  br i1 %.not, label %31, label %26, !llvm.loop !13

31:                                               ; preds = %26
  %32 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1)
  call void @llvm.lifetime.end.p0(i64 192, ptr nonnull %4) #4
  call void @llvm.lifetime.end.p0(i64 96, ptr nonnull %3) #4
  call void @llvm.lifetime.end.p0(i64 48, ptr nonnull %2) #4
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %1) #4
  ret i32 0
}

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

; Function Attrs: nounwind uwtable
declare hidden void @flatten(ptr noundef) local_unnamed_addr #0

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

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

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #3

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 nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nofree nounwind "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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
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, !7, i64 0}
!6 = !{!"TreeNode", !7, i64 0, !10, i64 8, !10, i64 16}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !10, i64 8}
!12 = !{!6, !10, i64 16}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


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