; LLVM IR from lolosssss/leetcode :: c (141_linked_list_cycle)

; 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.ListNode = type { i32, ptr }

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

; Function Attrs: nounwind uwtable
declare dso_local zeroext i1 @hasCycle(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
define dso_local i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca %struct.ListNode, align 8
  %3 = alloca %struct.ListNode, align 8
  %4 = alloca %struct.ListNode, align 8
  %5 = alloca %struct.ListNode, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 16, ptr %2) #4
  %6 = getelementptr inbounds %struct.ListNode, ptr %2, i32 0, i32 0
  store i32 0, ptr %6, align 8, !tbaa !5
  %7 = getelementptr inbounds %struct.ListNode, ptr %2, i32 0, i32 1
  store ptr %2, ptr %7, align 8, !tbaa !11
  %8 = call zeroext i1 @hasCycle(ptr noundef %2)
  %9 = zext i1 %8 to i32
  %10 = call i32 (ptr, ...) @printf(ptr noundef @.str, i32 noundef %9)
  call void @llvm.lifetime.start.p0(i64 16, ptr %3) #4
  call void @llvm.memset.p0.i64(ptr align 8 %3, i8 0, i64 16, i1 false)
  call void @llvm.lifetime.start.p0(i64 16, ptr %4) #4
  %11 = getelementptr inbounds %struct.ListNode, ptr %4, i32 0, i32 0
  store i32 0, ptr %11, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.ListNode, ptr %4, i32 0, i32 1
  store ptr %3, ptr %12, align 8, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 16, ptr %5) #4
  %13 = getelementptr inbounds %struct.ListNode, ptr %5, i32 0, i32 0
  store i32 0, ptr %13, align 8, !tbaa !5
  %14 = getelementptr inbounds %struct.ListNode, ptr %5, i32 0, i32 1
  store ptr %4, ptr %14, align 8, !tbaa !11
  %15 = getelementptr inbounds %struct.ListNode, ptr %3, i32 0, i32 1
  store ptr %4, ptr %15, align 8, !tbaa !11
  %16 = call zeroext i1 @hasCycle(ptr noundef %5)
  %17 = zext i1 %16 to i32
  %18 = call i32 (ptr, ...) @printf(ptr noundef @.str, i32 noundef %17)
  %19 = getelementptr inbounds %struct.ListNode, ptr %2, i32 0, i32 1
  store ptr null, ptr %19, align 8, !tbaa !11
  %20 = call zeroext i1 @hasCycle(ptr noundef %2)
  %21 = zext i1 %20 to i32
  %22 = call i32 (ptr, ...) @printf(ptr noundef @.str, i32 noundef %21)
  call void @llvm.lifetime.end.p0(i64 16, ptr %5) #4
  call void @llvm.lifetime.end.p0(i64 16, ptr %4) #4
  call void @llvm.lifetime.end.p0(i64 16, ptr %3) #4
  call void @llvm.lifetime.end.p0(i64 16, ptr %2) #4
  ret i32 0
}

declare i32 @printf(ptr noundef, ...) #2

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #3

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 = { "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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #4 = { 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 = !{!"ListNode", !7, i64 0, !10, i64 8}
!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 8}


; 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.ListNode = type { i32, ptr }

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

; Function Attrs: nounwind uwtable
declare dso_local zeroext i1 @hasCycle(ptr noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca %struct.ListNode, align 8
  %2 = alloca %struct.ListNode, align 8
  %3 = alloca %struct.ListNode, align 8
  %4 = alloca %struct.ListNode, align 8
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %1) #3
  store i32 0, ptr %1, align 8, !tbaa !5
  %5 = getelementptr inbounds i8, ptr %1, i64 8
  store ptr %1, ptr %5, align 8, !tbaa !11
  %6 = call zeroext i1 @hasCycle(ptr noundef nonnull %1)
  %7 = zext i1 %6 to i32
  %8 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, i32 noundef %7)
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %2) #3
  store i64 0, ptr %2, align 8
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %3) #3
  store i32 0, ptr %3, align 8, !tbaa !5
  %9 = getelementptr inbounds i8, ptr %3, i64 8
  store ptr %2, ptr %9, align 8, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %4) #3
  store i32 0, ptr %4, align 8, !tbaa !5
  %10 = getelementptr inbounds i8, ptr %4, i64 8
  store ptr %3, ptr %10, align 8, !tbaa !11
  %11 = getelementptr inbounds i8, ptr %2, i64 8
  store ptr %3, ptr %11, align 8, !tbaa !11
  %12 = call zeroext i1 @hasCycle(ptr noundef nonnull %4)
  %13 = zext i1 %12 to i32
  %14 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, i32 noundef %13)
  store ptr null, ptr %5, align 8, !tbaa !11
  %15 = call zeroext i1 @hasCycle(ptr noundef nonnull %1)
  %16 = zext i1 %15 to i32
  %17 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, i32 noundef %16)
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %4) #3
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %3) #3
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %2) #3
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %1) #3
  ret i32 0
}

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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" }
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, !7, i64 0}
!6 = !{!"ListNode", !7, i64 0, !10, i64 8}
!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 8}


; Effective O3 passes: DSEPass,EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass