; LLVM IR from ahampriyanshu/algo-ds-101 :: Data-Structures/Tree/Threaded Binary Tree/Threaded_Binary_Tree.ll (Z6createP6TBT_nd)

; 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"

%"class.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }
%"class.std::basic_istream" = type { ptr, i64, %"class.std::basic_ios" }
%struct.TBT_nd = type { i32, ptr, ptr, i32, i32 }

@head = external dso_local global ptr, align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@_ZSt3cin = external global %"class.std::basic_istream", align 8
@.str.1 = external hidden unnamed_addr constant [58 x i8], align 1

; Function Attrs: mustprogress uwtable
declare dso_local noundef ptr @_Z6insertP6TBT_ndS0_(ptr noundef, ptr noundef) #0

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

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

; Function Attrs: mustprogress uwtable
declare dso_local noundef ptr @_Z6new_ndv() #0

; Function Attrs: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znwm(i64 noundef) #2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) #3

declare noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 4 dereferenceable(4)) #4

; Function Attrs: mustprogress uwtable
define dso_local noundef ptr @_Z6createP6TBT_nd(ptr noundef %0) #0 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #5
  %5 = load ptr, ptr %2, align 8, !tbaa !5
  %6 = icmp eq ptr %5, null
  br i1 %6, label %7, label %22

7:                                                ; preds = %1
  %8 = call noalias noundef nonnull ptr @_Znwm(i64 noundef 32) #6
  store ptr %8, ptr @head, align 8, !tbaa !5
  %9 = load ptr, ptr @head, align 8, !tbaa !5
  %10 = getelementptr inbounds %struct.TBT_nd, ptr %9, i32 0, i32 0
  store i32 9999, ptr %10, align 8, !tbaa !9
  %11 = load ptr, ptr @head, align 8, !tbaa !5
  %12 = load ptr, ptr @head, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct.TBT_nd, ptr %12, i32 0, i32 1
  store ptr %11, ptr %13, align 8, !tbaa !12
  %14 = load ptr, ptr @head, align 8, !tbaa !5
  %15 = load ptr, ptr @head, align 8, !tbaa !5
  %16 = getelementptr inbounds %struct.TBT_nd, ptr %15, i32 0, i32 2
  store ptr %14, ptr %16, align 8, !tbaa !13
  %17 = load ptr, ptr @head, align 8, !tbaa !5
  %18 = getelementptr inbounds %struct.TBT_nd, ptr %17, i32 0, i32 4
  store i32 1, ptr %18, align 4, !tbaa !14
  %19 = load ptr, ptr @head, align 8, !tbaa !5
  %20 = getelementptr inbounds %struct.TBT_nd, ptr %19, i32 0, i32 3
  store i32 0, ptr %20, align 8, !tbaa !15
  %21 = load ptr, ptr @head, align 8, !tbaa !5
  store ptr %21, ptr %2, align 8, !tbaa !5
  br label %22

22:                                               ; preds = %7, %1
  br label %23

23:                                               ; preds = %34, %22
  %24 = call noundef ptr @_Z6new_ndv()
  store ptr %24, ptr %4, align 8, !tbaa !5
  %25 = load ptr, ptr %2, align 8, !tbaa !5
  %26 = icmp ne ptr %25, null
  br i1 %26, label %27, label %31

27:                                               ; preds = %23
  %28 = load ptr, ptr %2, align 8, !tbaa !5
  %29 = load ptr, ptr %4, align 8, !tbaa !5
  %30 = call noundef ptr @_Z6insertP6TBT_ndS0_(ptr noundef %28, ptr noundef %29)
  store ptr %30, ptr %2, align 8, !tbaa !5
  br label %31

31:                                               ; preds = %27, %23
  %32 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef @.str.1)
  %33 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %3)
  br label %34

34:                                               ; preds = %31
  %35 = load i32, ptr %3, align 4, !tbaa !16
  %36 = icmp eq i32 %35, 1
  br i1 %36, label %23, label %37, !llvm.loop !17

37:                                               ; preds = %34
  %38 = load ptr, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #5
  ret ptr %38
}

attributes #0 = { 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nobuiltin 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 = { inlinehint 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 #4 = { "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 #5 = { nounwind }
attributes #6 = { builtin 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++ TBAA"}
!9 = !{!10, !11, i64 0}
!10 = !{!"_ZTS6TBT_nd", !11, i64 0, !6, i64 8, !6, i64 16, !11, i64 24, !11, i64 28}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !6, i64 8}
!13 = !{!10, !6, i64 16}
!14 = !{!10, !11, i64 28}
!15 = !{!10, !11, i64 24}
!16 = !{!11, !11, i64 0}
!17 = distinct !{!17, !18}
!18 = !{!"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"

%"class.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }
%"class.std::basic_istream" = type { ptr, i64, %"class.std::basic_ios" }

@head = external dso_local local_unnamed_addr global ptr, align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@_ZSt3cin = external global %"class.std::basic_istream", align 8
@.str.1 = external hidden unnamed_addr constant [58 x i8], align 1

; Function Attrs: mustprogress uwtable
declare dso_local noundef ptr @_Z6insertP6TBT_ndS0_(ptr noundef, ptr noundef) local_unnamed_addr #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: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress uwtable
declare dso_local noundef ptr @_Z6new_ndv() local_unnamed_addr #0

; Function Attrs: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znwm(i64 noundef) local_unnamed_addr #2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) local_unnamed_addr #3

declare noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #4

; Function Attrs: mustprogress uwtable
define dso_local noundef ptr @_Z6createP6TBT_nd(ptr noundef %0) local_unnamed_addr #0 {
  %2 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #5
  %3 = icmp eq ptr %0, null
  br i1 %3, label %4, label %.preheader

4:                                                ; preds = %1
  %5 = tail call noalias noundef nonnull dereferenceable(32) ptr @_Znwm(i64 noundef 32) #6
  store ptr %5, ptr @head, align 8, !tbaa !5
  store i32 9999, ptr %5, align 8, !tbaa !9
  %6 = getelementptr inbounds i8, ptr %5, i64 8
  store ptr %5, ptr %6, align 8, !tbaa !12
  %7 = getelementptr inbounds i8, ptr %5, i64 16
  store ptr %5, ptr %7, align 8, !tbaa !13
  %8 = getelementptr inbounds i8, ptr %5, i64 28
  store i32 1, ptr %8, align 4, !tbaa !14
  %9 = getelementptr inbounds i8, ptr %5, i64 24
  store i32 0, ptr %9, align 8, !tbaa !15
  br label %.preheader

.preheader:                                       ; preds = %4, %1
  %.1.ph = phi ptr [ %0, %1 ], [ %5, %4 ]
  br label %10

10:                                               ; preds = %.preheader, %14
  %.1 = phi ptr [ %.2, %14 ], [ %.1.ph, %.preheader ]
  %11 = call noundef ptr @_Z6new_ndv()
  %.not = icmp eq ptr %.1, null
  br i1 %.not, label %14, label %12

12:                                               ; preds = %10
  %13 = call noundef ptr @_Z6insertP6TBT_ndS0_(ptr noundef nonnull %.1, ptr noundef %11)
  br label %14

14:                                               ; preds = %12, %10
  %.2 = phi ptr [ %13, %12 ], [ null, %10 ]
  %15 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef nonnull @.str.1)
  %16 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %2)
  %17 = load i32, ptr %2, align 4, !tbaa !16
  %18 = icmp eq i32 %17, 1
  br i1 %18, label %10, label %19, !llvm.loop !17

19:                                               ; preds = %14
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #5
  ret ptr %.2
}

attributes #0 = { 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 #1 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nobuiltin 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 = { inlinehint 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 #4 = { "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 #5 = { nounwind }
attributes #6 = { builtin 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++ TBAA"}
!9 = !{!10, !11, i64 0}
!10 = !{!"_ZTS6TBT_nd", !11, i64 0, !6, i64 8, !6, i64 16, !11, i64 24, !11, i64 28}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !6, i64 8}
!13 = !{!10, !6, i64 16}
!14 = !{!10, !11, i64 28}
!15 = !{!10, !11, i64 24}
!16 = !{!11, !11, i64 0}
!17 = distinct !{!17, !18}
!18 = !{!"llvm.loop.mustprogress"}


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