; LLVM IR from TyrantLucifer/DataStructure :: Tree (HuffmanTree)

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

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

; Function Attrs: nounwind uwtable
define dso_local void @preOrder(ptr noundef %0, i32 noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  %5 = load i32, ptr %4, align 4, !tbaa !9
  %6 = icmp ne i32 %5, -1
  br i1 %6, label %7, label %35

7:                                                ; preds = %2
  %8 = load ptr, ptr %3, align 8, !tbaa !5
  %9 = getelementptr inbounds %struct.HFTree, ptr %8, i32 0, i32 0
  %10 = load ptr, ptr %9, align 8, !tbaa !11
  %11 = load i32, ptr %4, align 4, !tbaa !9
  %12 = sext i32 %11 to i64
  %13 = getelementptr inbounds %struct.TreeNode, ptr %10, i64 %12
  %14 = getelementptr inbounds %struct.TreeNode, ptr %13, i32 0, i32 0
  %15 = load i32, ptr %14, align 4, !tbaa !13
  %16 = call i32 (ptr, ...) @printf(ptr noundef @.str, i32 noundef %15)
  %17 = load ptr, ptr %3, align 8, !tbaa !5
  %18 = load ptr, ptr %3, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct.HFTree, ptr %18, i32 0, i32 0
  %20 = load ptr, ptr %19, align 8, !tbaa !11
  %21 = load i32, ptr %4, align 4, !tbaa !9
  %22 = sext i32 %21 to i64
  %23 = getelementptr inbounds %struct.TreeNode, ptr %20, i64 %22
  %24 = getelementptr inbounds %struct.TreeNode, ptr %23, i32 0, i32 2
  %25 = load i32, ptr %24, align 4, !tbaa !15
  call void @preOrder(ptr noundef %17, i32 noundef %25)
  %26 = load ptr, ptr %3, align 8, !tbaa !5
  %27 = load ptr, ptr %3, align 8, !tbaa !5
  %28 = getelementptr inbounds %struct.HFTree, ptr %27, i32 0, i32 0
  %29 = load ptr, ptr %28, align 8, !tbaa !11
  %30 = load i32, ptr %4, align 4, !tbaa !9
  %31 = sext i32 %30 to i64
  %32 = getelementptr inbounds %struct.TreeNode, ptr %29, i64 %31
  %33 = getelementptr inbounds %struct.TreeNode, ptr %32, i32 0, i32 3
  %34 = load i32, ptr %33, align 4, !tbaa !16
  call void @preOrder(ptr noundef %26, i32 noundef %34)
  br label %35

35:                                               ; preds = %7, %2
  ret void
}

declare i32 @printf(ptr noundef, ...) #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 = { "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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !6, i64 0}
!12 = !{!"HFTree", !6, i64 0, !10, i64 8}
!13 = !{!14, !10, i64 0}
!14 = !{!"TreeNode", !10, i64 0, !10, i64 4, !10, i64 8, !10, i64 12}
!15 = !{!14, !10, i64 8}
!16 = !{!14, !10, i64 12}


; 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, i32, i32, i32 }

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

; Function Attrs: nofree nounwind uwtable
define dso_local void @preOrder(ptr nocapture noundef readonly %0, i32 noundef %1) local_unnamed_addr #0 {
  %.not9 = icmp eq i32 %1, -1
  br i1 %.not9, label %tailrecurse._crit_edge, label %tailrecurse.preheader

tailrecurse.preheader:                            ; preds = %2
  %.pre = load ptr, ptr %0, align 8, !tbaa !5
  br label %tailrecurse

tailrecurse:                                      ; preds = %tailrecurse.preheader, %tailrecurse
  %3 = phi ptr [ %11, %tailrecurse ], [ %.pre, %tailrecurse.preheader ]
  %.tr810 = phi i32 [ %13, %tailrecurse ], [ %1, %tailrecurse.preheader ]
  %4 = sext i32 %.tr810 to i64
  %5 = getelementptr inbounds %struct.TreeNode, ptr %3, i64 %4
  %6 = load i32, ptr %5, align 4, !tbaa !11
  %7 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, i32 noundef %6)
  %8 = load ptr, ptr %0, align 8, !tbaa !5
  %9 = getelementptr inbounds %struct.TreeNode, ptr %8, i64 %4, i32 2
  %10 = load i32, ptr %9, align 4, !tbaa !13
  tail call void @preOrder(ptr noundef nonnull %0, i32 noundef %10)
  %11 = load ptr, ptr %0, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.TreeNode, ptr %11, i64 %4, i32 3
  %13 = load i32, ptr %12, align 4, !tbaa !14
  %.not = icmp eq i32 %13, -1
  br i1 %.not, label %tailrecurse._crit_edge, label %tailrecurse

tailrecurse._crit_edge:                           ; preds = %tailrecurse, %2
  ret void
}

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #1

attributes #0 = { 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 #1 = { 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" }

!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 = !{!"HFTree", !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, !10, i64 0}
!12 = !{!"TreeNode", !10, i64 0, !10, i64 4, !10, i64 8, !10, i64 12}
!13 = !{!12, !10, i64 8}
!14 = !{!12, !10, i64 12}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass