; LLVM IR from lolosssss/leetcode :: c (203_remove_linked_list_elements)

; 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"

@__const.main.arr = external hidden unnamed_addr constant [7 x i32], align 16
@__const.main.arr2 = external hidden unnamed_addr constant [2 x i32], align 4

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

; Function Attrs: nounwind uwtable
declare dso_local void @freeList(ptr noundef) #0

; Function Attrs: nounwind uwtable
declare dso_local void @printList(ptr noundef) #0

; Function Attrs: nounwind uwtable
define dso_local i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca [7 x i32], align 16
  %3 = alloca [2 x i32], align 4
  %4 = alloca ptr, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 28, ptr %2) #3
  call void @llvm.memcpy.p0.p0.i64(ptr align 16 %2, ptr align 16 @__const.main.arr, i64 28, i1 false)
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %3, ptr align 4 @__const.main.arr2, i64 8, i1 false)
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  store ptr null, ptr %4, align 8, !tbaa !5
  %5 = getelementptr inbounds [7 x i32], ptr %2, i64 0, i64 0
  %6 = call ptr @createList(ptr noundef %5, i32 noundef 7)
  store ptr %6, ptr %4, align 8, !tbaa !5
  %7 = load ptr, ptr %4, align 8, !tbaa !5
  call void @printList(ptr noundef %7)
  %8 = load ptr, ptr %4, align 8, !tbaa !5
  %9 = call ptr @removeElements(ptr noundef %8, i32 noundef 6)
  store ptr %9, ptr %4, align 8, !tbaa !5
  %10 = load ptr, ptr %4, align 8, !tbaa !5
  call void @printList(ptr noundef %10)
  %11 = load ptr, ptr %4, align 8, !tbaa !5
  call void @freeList(ptr noundef %11)
  %12 = getelementptr inbounds [2 x i32], ptr %3, i64 0, i64 0
  %13 = call ptr @createList(ptr noundef %12, i32 noundef 2)
  store ptr %13, ptr %4, align 8, !tbaa !5
  %14 = load ptr, ptr %4, align 8, !tbaa !5
  call void @printList(ptr noundef %14)
  %15 = load ptr, ptr %4, align 8, !tbaa !5
  %16 = call ptr @removeElements(ptr noundef %15, i32 noundef 1)
  store ptr %16, ptr %4, align 8, !tbaa !5
  %17 = load ptr, ptr %4, align 8, !tbaa !5
  call void @printList(ptr noundef %17)
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  call void @llvm.lifetime.end.p0(i64 28, ptr %2) #3
  ret i32 0
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #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 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
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"}


; 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"

@__const.main.arr = external hidden unnamed_addr constant [7 x i32], align 16
@__const.main.arr2 = external hidden unnamed_addr constant [2 x i32], align 4

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

; Function Attrs: nounwind uwtable
declare dso_local void @freeList(ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local void @printList(ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca [7 x i32], align 16
  %2 = alloca [2 x i32], align 8
  call void @llvm.lifetime.start.p0(i64 28, ptr nonnull %1) #3
  call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 16 dereferenceable(28) %1, ptr noundef nonnull align 16 dereferenceable(28) @__const.main.arr, i64 28, i1 false)
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  %3 = load i64, ptr @__const.main.arr2, align 4
  store i64 %3, ptr %2, align 8
  %4 = call ptr @createList(ptr noundef nonnull %1, i32 noundef 7)
  call void @printList(ptr noundef %4)
  %5 = call ptr @removeElements(ptr noundef %4, i32 noundef 6)
  call void @printList(ptr noundef %5)
  call void @freeList(ptr noundef %5)
  %6 = call ptr @createList(ptr noundef nonnull %2, i32 noundef 2)
  call void @printList(ptr noundef %6)
  %7 = call ptr @removeElements(ptr noundef %6, i32 noundef 1)
  call void @printList(ptr noundef %7)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  call void @llvm.lifetime.end.p0(i64 28, ptr nonnull %1) #3
  ret i32 0
}

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #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 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite) }
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)"}


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