; LLVM IR from AlgoGenesis/C :: Backtracking Algorithms/Leaf Similar Tree (Program_leaf)

; 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 }

; Function Attrs: nounwind uwtable
define dso_local void @collectLeaves(ptr noundef %0, ptr noundef %1, ptr noundef %2) #0 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  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 %41

10:                                               ; preds = %3
  %11 = load ptr, ptr %4, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.TreeNode, ptr %11, i32 0, i32 1
  %13 = load ptr, ptr %12, align 8, !tbaa !9
  %14 = icmp eq ptr %13, null
  br i1 %14, label %15, label %30

15:                                               ; preds = %10
  %16 = load ptr, ptr %4, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.TreeNode, ptr %16, i32 0, i32 2
  %18 = load ptr, ptr %17, align 8, !tbaa !12
  %19 = icmp eq ptr %18, null
  br i1 %19, label %20, label %30

20:                                               ; preds = %15
  %21 = load ptr, ptr %4, align 8, !tbaa !5
  %22 = getelementptr inbounds %struct.TreeNode, ptr %21, i32 0, i32 0
  %23 = load i32, ptr %22, align 8, !tbaa !13
  %24 = load ptr, ptr %5, align 8, !tbaa !5
  %25 = load ptr, ptr %6, align 8, !tbaa !5
  %26 = load i32, ptr %25, align 4, !tbaa !14
  %27 = add nsw i32 %26, 1
  store i32 %27, ptr %25, align 4, !tbaa !14
  %28 = sext i32 %26 to i64
  %29 = getelementptr inbounds i32, ptr %24, i64 %28
  store i32 %23, ptr %29, align 4, !tbaa !14
  br label %41

30:                                               ; preds = %15, %10
  %31 = load ptr, ptr %4, align 8, !tbaa !5
  %32 = getelementptr inbounds %struct.TreeNode, ptr %31, i32 0, i32 1
  %33 = load ptr, ptr %32, align 8, !tbaa !9
  %34 = load ptr, ptr %5, align 8, !tbaa !5
  %35 = load ptr, ptr %6, align 8, !tbaa !5
  call void @collectLeaves(ptr noundef %33, ptr noundef %34, ptr noundef %35)
  %36 = load ptr, ptr %4, align 8, !tbaa !5
  %37 = getelementptr inbounds %struct.TreeNode, ptr %36, i32 0, i32 2
  %38 = load ptr, ptr %37, align 8, !tbaa !12
  %39 = load ptr, ptr %5, align 8, !tbaa !5
  %40 = load ptr, ptr %6, align 8, !tbaa !5
  call void @collectLeaves(ptr noundef %38, ptr noundef %39, ptr noundef %40)
  br label %41

41:                                               ; preds = %30, %20, %9
  ret void
}

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" }

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


; 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: nofree nosync nounwind memory(readwrite, inaccessiblemem: none) uwtable
define dso_local void @collectLeaves(ptr noundef readonly %0, ptr nocapture noundef writeonly %1, ptr nocapture noundef %2) local_unnamed_addr #0 {
  %4 = icmp eq ptr %0, null
  br i1 %4, label %.loopexit, label %.lr.ph

.lr.ph:                                           ; preds = %3, %tailrecurse
  %.tr15 = phi ptr [ %19, %tailrecurse ], [ %0, %3 ]
  %5 = getelementptr inbounds i8, ptr %.tr15, i64 8
  %6 = load ptr, ptr %5, align 8, !tbaa !5
  %7 = icmp eq ptr %6, null
  br i1 %7, label %8, label %tailrecurse

8:                                                ; preds = %.lr.ph
  %9 = getelementptr inbounds i8, ptr %.tr15, i64 16
  %10 = load ptr, ptr %9, align 8, !tbaa !11
  %11 = icmp eq ptr %10, null
  br i1 %11, label %12, label %tailrecurse

12:                                               ; preds = %8
  %13 = load i32, ptr %.tr15, align 8, !tbaa !12
  %14 = load i32, ptr %2, align 4, !tbaa !13
  %15 = add nsw i32 %14, 1
  store i32 %15, ptr %2, align 4, !tbaa !13
  %16 = sext i32 %14 to i64
  %17 = getelementptr inbounds i32, ptr %1, i64 %16
  store i32 %13, ptr %17, align 4, !tbaa !13
  br label %.loopexit

tailrecurse:                                      ; preds = %8, %.lr.ph
  tail call void @collectLeaves(ptr noundef %6, ptr noundef %1, ptr noundef %2)
  %18 = getelementptr inbounds i8, ptr %.tr15, i64 16
  %19 = load ptr, ptr %18, align 8, !tbaa !11
  %20 = icmp eq ptr %19, null
  br i1 %20, label %.loopexit, label %.lr.ph

.loopexit:                                        ; preds = %tailrecurse, %3, %12
  ret void
}

attributes #0 = { nofree nosync nounwind memory(readwrite, inaccessiblemem: none) 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 = !{!"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 16}
!12 = !{!6, !7, i64 0}
!13 = !{!7, !7, i64 0}


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