; LLVM IR from lolosssss/leetcode :: c (23_merge_k_sorted_lists)

; 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"

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
declare dso_local ptr @mergeKLists(ptr noundef, i32 noundef) #1

; Function Attrs: nounwind uwtable
declare dso_local ptr @createList(ptr noundef, i32 noundef) #1

; Function Attrs: nounwind uwtable
declare dso_local ptr @sortList(ptr noundef) #1

; Function Attrs: nounwind uwtable
declare dso_local void @printList(ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local i32 @main() #1 {
  %1 = alloca i32, align 4
  %2 = alloca [0 x i32], align 4
  %3 = alloca [0 x i32], align 4
  %4 = alloca [2 x ptr], align 16
  %5 = alloca ptr, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 0, ptr %2) #2
  call void @llvm.lifetime.start.p0(i64 0, ptr %3) #2
  call void @llvm.lifetime.start.p0(i64 16, ptr %4) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  store ptr null, ptr %5, align 8, !tbaa !5
  %6 = getelementptr inbounds [0 x i32], ptr %2, i64 0, i64 0
  %7 = call ptr @createList(ptr noundef %6, i32 noundef 0)
  %8 = getelementptr inbounds [2 x ptr], ptr %4, i64 0, i64 0
  store ptr %7, ptr %8, align 16, !tbaa !5
  %9 = getelementptr inbounds [0 x i32], ptr %3, i64 0, i64 0
  %10 = call ptr @createList(ptr noundef %9, i32 noundef 0)
  %11 = getelementptr inbounds [2 x ptr], ptr %4, i64 0, i64 1
  store ptr %10, ptr %11, align 8, !tbaa !5
  %12 = getelementptr inbounds [2 x ptr], ptr %4, i64 0, i64 0
  %13 = load ptr, ptr %12, align 16, !tbaa !5
  %14 = call ptr @sortList(ptr noundef %13)
  %15 = getelementptr inbounds [2 x ptr], ptr %4, i64 0, i64 0
  store ptr %14, ptr %15, align 16, !tbaa !5
  %16 = getelementptr inbounds [2 x ptr], ptr %4, i64 0, i64 1
  %17 = load ptr, ptr %16, align 8, !tbaa !5
  %18 = call ptr @sortList(ptr noundef %17)
  %19 = getelementptr inbounds [2 x ptr], ptr %4, i64 0, i64 1
  store ptr %18, ptr %19, align 8, !tbaa !5
  %20 = getelementptr inbounds [2 x ptr], ptr %4, i64 0, i64 0
  %21 = call ptr @mergeKLists(ptr noundef %20, i32 noundef 2)
  store ptr %21, ptr %5, align 8, !tbaa !5
  %22 = load ptr, ptr %5, align 8, !tbaa !5
  call void @printList(ptr noundef %22)
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  call void @llvm.lifetime.end.p0(i64 16, ptr %4) #2
  call void @llvm.lifetime.end.p0(i64 0, ptr %3) #2
  call void @llvm.lifetime.end.p0(i64 0, ptr %2) #2
  ret i32 0
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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, !6, i64 0}
!6 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


; 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 nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
declare dso_local ptr @mergeKLists(ptr noundef, i32 noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
declare dso_local ptr @createList(ptr noundef, i32 noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
declare dso_local ptr @sortList(ptr noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
declare dso_local void @printList(ptr noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #1 {
  %1 = alloca [0 x i32], align 4
  %2 = alloca [2 x ptr], align 16
  call void @llvm.lifetime.start.p0(i64 0, ptr nonnull %1) #2
  call void @llvm.lifetime.start.p0(i64 0, ptr nonnull %1) #2
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %2) #2
  %3 = call ptr @createList(ptr noundef nonnull %1, i32 noundef 0)
  %4 = call ptr @createList(ptr noundef nonnull %1, i32 noundef 0)
  %5 = getelementptr inbounds i8, ptr %2, i64 8
  %6 = call ptr @sortList(ptr noundef %3)
  store ptr %6, ptr %2, align 16, !tbaa !5
  %7 = call ptr @sortList(ptr noundef %4)
  store ptr %7, ptr %5, align 8, !tbaa !5
  %8 = call ptr @mergeKLists(ptr noundef nonnull %2, i32 noundef 2)
  call void @printList(ptr noundef %8)
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %2) #2
  call void @llvm.lifetime.end.p0(i64 0, ptr nonnull %1) #2
  call void @llvm.lifetime.end.p0(i64 0, ptr nonnull %1) #2
  ret i32 0
}

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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, !6, i64 0}
!6 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


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