; LLVM IR from div-bargali/Data-Structures-and-Algorithms :: C++/Data-Structures/BST (Constructing BST from Level Order Traversal)

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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef ptr @_Z10createNodei(i32 noundef) #0

; Function Attrs: mustprogress uwtable
define dso_local noundef ptr @_Z10levelOrderP4nodei(ptr noundef %0, i32 noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  %6 = load ptr, ptr %4, align 8, !tbaa !5
  %7 = icmp eq ptr %6, null
  br i1 %7, label %8, label %12

8:                                                ; preds = %2
  %9 = load i32, ptr %5, align 4, !tbaa !9
  %10 = call noundef ptr @_Z10createNodei(i32 noundef %9)
  store ptr %10, ptr %4, align 8, !tbaa !5
  %11 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %11, ptr %3, align 8
  br label %36

12:                                               ; preds = %2
  %13 = load i32, ptr %5, align 4, !tbaa !9
  %14 = load ptr, ptr %4, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct.node, ptr %14, i32 0, i32 0
  %16 = load i32, ptr %15, align 8, !tbaa !11
  %17 = icmp sle i32 %13, %16
  br i1 %17, label %18, label %26

18:                                               ; preds = %12
  %19 = load ptr, ptr %4, align 8, !tbaa !5
  %20 = getelementptr inbounds %struct.node, ptr %19, i32 0, i32 1
  %21 = load ptr, ptr %20, align 8, !tbaa !13
  %22 = load i32, ptr %5, align 4, !tbaa !9
  %23 = call noundef ptr @_Z10levelOrderP4nodei(ptr noundef %21, i32 noundef %22)
  %24 = load ptr, ptr %4, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct.node, ptr %24, i32 0, i32 1
  store ptr %23, ptr %25, align 8, !tbaa !13
  br label %34

26:                                               ; preds = %12
  %27 = load ptr, ptr %4, align 8, !tbaa !5
  %28 = getelementptr inbounds %struct.node, ptr %27, i32 0, i32 2
  %29 = load ptr, ptr %28, align 8, !tbaa !14
  %30 = load i32, ptr %5, align 4, !tbaa !9
  %31 = call noundef ptr @_Z10levelOrderP4nodei(ptr noundef %29, i32 noundef %30)
  %32 = load ptr, ptr %4, align 8, !tbaa !5
  %33 = getelementptr inbounds %struct.node, ptr %32, i32 0, i32 2
  store ptr %31, ptr %33, align 8, !tbaa !14
  br label %34

34:                                               ; preds = %26, %18
  %35 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %35, ptr %3, align 8
  br label %36

36:                                               ; preds = %34, %8
  %37 = load ptr, ptr %3, align 8
  ret ptr %37
}

attributes #0 = { mustprogress 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 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" }

!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, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 0}
!12 = !{!"_ZTS4node", !10, i64 0, !6, i64 8, !6, i64 16}
!13 = !{!12, !6, i64 8}
!14 = !{!12, !6, 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"

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef ptr @_Z10createNodei(i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef ptr @_Z10levelOrderP4nodei(ptr noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp eq ptr %0, null
  br i1 %3, label %common.ret, label %5

common.ret:                                       ; preds = %2
  %4 = tail call noundef ptr @_Z10createNodei(i32 noundef %1)
  br label %common.ret14

5:                                                ; preds = %2
  %6 = load i32, ptr %0, align 8, !tbaa !5
  %.not = icmp slt i32 %6, %1
  br i1 %.not, label %11, label %7

common.ret14:                                     ; preds = %11, %7, %common.ret
  %common.ret14.op = phi ptr [ %4, %common.ret ], [ %0, %7 ], [ %0, %11 ]
  ret ptr %common.ret14.op

7:                                                ; preds = %5
  %8 = getelementptr inbounds i8, ptr %0, i64 8
  %9 = load ptr, ptr %8, align 8, !tbaa !11
  %10 = tail call noundef ptr @_Z10levelOrderP4nodei(ptr noundef %9, i32 noundef %1)
  store ptr %10, ptr %8, align 8, !tbaa !11
  br label %common.ret14

11:                                               ; preds = %5
  %12 = getelementptr inbounds i8, ptr %0, i64 16
  %13 = load ptr, ptr %12, align 8, !tbaa !12
  %14 = tail call noundef ptr @_Z10levelOrderP4nodei(ptr noundef %13, i32 noundef %1)
  store ptr %14, ptr %12, align 8, !tbaa !12
  br label %common.ret14
}

attributes #0 = { mustprogress 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" }

!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 = !{!"_ZTS4node", !7, i64 0, !10, i64 8, !10, i64 16}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !10, i64 8}
!12 = !{!6, !10, i64 16}


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