; LLVM IR from Leet-Us-Code/DSA-A-Z-Practice :: Sid's Levels/Level - 1/BinaryTree/LevelOrder.ll (Z10givenLevelP4NodeiRSt6vectorIiSaIiEE)

; 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 uwtable
define dso_local void @_Z10givenLevelP4NodeiRSt6vectorIiSaIiEE(ptr noundef %0, i32 noundef %1, ptr noundef nonnull align 8 dereferenceable(24) %2) #0 {
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  store ptr %2, ptr %6, align 8, !tbaa !5
  %7 = load ptr, ptr %4, align 8, !tbaa !5
  %8 = icmp eq ptr %7, null
  br i1 %8, label %9, label %10

9:                                                ; preds = %3
  br label %30

10:                                               ; preds = %3
  %11 = load i32, ptr %5, align 4, !tbaa !9
  %12 = icmp eq i32 %11, 0
  br i1 %12, label %13, label %17

13:                                               ; preds = %10
  %14 = load ptr, ptr %6, align 8, !tbaa !5
  %15 = load ptr, ptr %4, align 8, !tbaa !5
  %16 = getelementptr inbounds %struct.Node, ptr %15, i32 0, i32 0
  call void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24) %14, ptr noundef nonnull align 4 dereferenceable(4) %16)
  br label %30

17:                                               ; preds = %10
  %18 = load ptr, ptr %4, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct.Node, ptr %18, i32 0, i32 1
  %20 = load ptr, ptr %19, align 8, !tbaa !11
  %21 = load i32, ptr %5, align 4, !tbaa !9
  %22 = sub nsw i32 %21, 1
  %23 = load ptr, ptr %6, align 8, !tbaa !5
  call void @_Z10givenLevelP4NodeiRSt6vectorIiSaIiEE(ptr noundef %20, i32 noundef %22, ptr noundef nonnull align 8 dereferenceable(24) %23)
  %24 = load ptr, ptr %4, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct.Node, ptr %24, i32 0, i32 2
  %26 = load ptr, ptr %25, align 8, !tbaa !13
  %27 = load i32, ptr %5, align 4, !tbaa !9
  %28 = sub nsw i32 %27, 1
  %29 = load ptr, ptr %6, align 8, !tbaa !5
  call void @_Z10givenLevelP4NodeiRSt6vectorIiSaIiEE(ptr noundef %26, i32 noundef %28, ptr noundef nonnull align 8 dereferenceable(24) %29)
  br label %30

30:                                               ; preds = %17, %13, %9
  ret void
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 4 dereferenceable(4)) #0 align 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" }

!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, !6, i64 8}
!12 = !{!"_ZTS4Node", !10, i64 0, !6, i64 8, !6, i64 16}
!13 = !{!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 uwtable
define dso_local void @_Z10givenLevelP4NodeiRSt6vectorIiSaIiEE(ptr noundef %0, i32 noundef %1, ptr noundef nonnull align 8 dereferenceable(24) %2) local_unnamed_addr #0 {
  %4 = icmp eq ptr %0, null
  br i1 %4, label %.loopexit, label %.lr.ph

.lr.ph:                                           ; preds = %3, %tailrecurse
  %.tr1014 = phi i32 [ %9, %tailrecurse ], [ %1, %3 ]
  %.tr13 = phi ptr [ %11, %tailrecurse ], [ %0, %3 ]
  %5 = icmp eq i32 %.tr1014, 0
  br i1 %5, label %6, label %tailrecurse

6:                                                ; preds = %.lr.ph
  tail call void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24) %2, ptr noundef nonnull align 4 dereferenceable(4) %.tr13)
  br label %.loopexit

tailrecurse:                                      ; preds = %.lr.ph
  %7 = getelementptr inbounds i8, ptr %.tr13, i64 8
  %8 = load ptr, ptr %7, align 8, !tbaa !5
  %9 = add nsw i32 %.tr1014, -1
  tail call void @_Z10givenLevelP4NodeiRSt6vectorIiSaIiEE(ptr noundef %8, i32 noundef %9, ptr noundef nonnull align 8 dereferenceable(24) %2)
  %10 = getelementptr inbounds i8, ptr %.tr13, i64 16
  %11 = load ptr, ptr %10, align 8, !tbaa !11
  %12 = icmp eq ptr %11, null
  br i1 %12, label %.loopexit, label %.lr.ph

.loopexit:                                        ; preds = %tailrecurse, %3, %6
  ret void
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #0 align 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" }

!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, !10, i64 8}
!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 16}


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