; LLVM IR from DimitrisJim/leetcode_solutions :: C/Algorithms (872)

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

; Function Attrs: nounwind uwtable
declare dso_local i32 @next_leaf(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: nounwind uwtable
declare dso_local ptr @make_stack(i32 noundef, ptr noundef) #0

; Function Attrs: nounwind uwtable
define dso_local zeroext i1 @leafSimilar(ptr noundef %0, ptr noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i8, align 1
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  %11 = load ptr, ptr %3, align 8, !tbaa !5
  %12 = call ptr @make_stack(i32 noundef 8, ptr noundef %11)
  store ptr %12, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %13 = load ptr, ptr %4, align 8, !tbaa !5
  %14 = call ptr @make_stack(i32 noundef 8, ptr noundef %13)
  store ptr %14, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 1, ptr %7) #3
  store i8 0, ptr %7, align 1, !tbaa !9
  br label %15

15:                                               ; preds = %35, %2
  br label %16

16:                                               ; preds = %15
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  %17 = load ptr, ptr %5, align 8, !tbaa !5
  %18 = call i32 @next_leaf(ptr noundef %17)
  store i32 %18, ptr %8, align 4, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  %19 = load ptr, ptr %6, align 8, !tbaa !5
  %20 = call i32 @next_leaf(ptr noundef %19)
  store i32 %20, ptr %9, align 4, !tbaa !11
  %21 = load i32, ptr %8, align 4, !tbaa !11
  %22 = load i32, ptr %9, align 4, !tbaa !11
  %23 = icmp ne i32 %21, %22
  br i1 %23, label %24, label %25

24:                                               ; preds = %16
  store i32 3, ptr %10, align 4
  br label %33

25:                                               ; preds = %16
  %26 = load i32, ptr %8, align 4, !tbaa !11
  %27 = icmp eq i32 %26, -1
  br i1 %27, label %28, label %32

28:                                               ; preds = %25
  %29 = load i32, ptr %9, align 4, !tbaa !11
  %30 = icmp eq i32 %29, -1
  br i1 %30, label %31, label %32

31:                                               ; preds = %28
  store i8 1, ptr %7, align 1, !tbaa !9
  store i32 3, ptr %10, align 4
  br label %33

32:                                               ; preds = %28, %25
  store i32 0, ptr %10, align 4
  br label %33

33:                                               ; preds = %32, %31, %24
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  %34 = load i32, ptr %10, align 4
  switch i32 %34, label %47 [
    i32 0, label %35
    i32 3, label %36
  ]

35:                                               ; preds = %33
  br label %15

36:                                               ; preds = %33
  %37 = load ptr, ptr %5, align 8, !tbaa !5
  %38 = getelementptr inbounds %struct.stack, ptr %37, i32 0, i32 0
  %39 = load ptr, ptr %38, align 8, !tbaa !13
  call void @free(ptr noundef %39) #3
  %40 = load ptr, ptr %6, align 8, !tbaa !5
  %41 = getelementptr inbounds %struct.stack, ptr %40, i32 0, i32 0
  %42 = load ptr, ptr %41, align 8, !tbaa !13
  call void @free(ptr noundef %42) #3
  %43 = load ptr, ptr %5, align 8, !tbaa !5
  call void @free(ptr noundef %43) #3
  %44 = load ptr, ptr %6, align 8, !tbaa !5
  call void @free(ptr noundef %44) #3
  %45 = load i8, ptr %7, align 1, !tbaa !9, !range !15, !noundef !16
  %46 = trunc i8 %45 to i1
  store i32 1, ptr %10, align 4
  call void @llvm.lifetime.end.p0(i64 1, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  ret i1 %46

47:                                               ; preds = %33
  unreachable
}

; Function Attrs: nounwind
declare void @free(ptr noundef) #2

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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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" }
attributes #3 = { nounwind }

!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 = !{!"_Bool", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = !{!14, !6, i64 0}
!14 = !{!"", !6, i64 0, !12, i64 8, !12, i64 12}
!15 = !{i8 0, i8 2}
!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: nounwind uwtable
declare dso_local i32 @next_leaf(ptr noundef) local_unnamed_addr #0

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

; Function Attrs: nounwind uwtable
define dso_local zeroext i1 @leafSimilar(ptr noundef %0, ptr noundef %1) local_unnamed_addr #0 {
  %3 = tail call ptr @make_stack(i32 noundef 8, ptr noundef %0)
  %4 = tail call ptr @make_stack(i32 noundef 8, ptr noundef %1)
  br label %5

5:                                                ; preds = %5, %2
  %.014 = phi i1 [ false, %2 ], [ %.1, %5 ]
  %6 = tail call i32 @next_leaf(ptr noundef %3)
  %7 = tail call i32 @next_leaf(ptr noundef %4)
  %.not = icmp eq i32 %6, %7
  %or.cond = icmp eq i32 %7, -1
  %8 = and i1 %.not, %or.cond
  %.1 = select i1 %8, i1 true, i1 %.014
  %not.or.cond = xor i1 %or.cond, true
  %switch = and i1 %.not, %not.or.cond
  br i1 %switch, label %5, label %9

9:                                                ; preds = %5
  %10 = load ptr, ptr %3, align 8, !tbaa !5
  tail call void @free(ptr noundef %10) #2
  %11 = load ptr, ptr %4, align 8, !tbaa !5
  tail call void @free(ptr noundef %11) #2
  tail call void @free(ptr noundef %3) #2
  tail call void @free(ptr noundef %4) #2
  ret i1 %.1
}

; Function Attrs: mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite)
declare void @free(ptr allocptr nocapture noundef) local_unnamed_addr #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 = { mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite) "alloc-family"="malloc" "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 #2 = { nounwind }

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


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