; LLVM IR from Ayon-SSP/The-SDE-Prep :: 1]_Data Structures/2]_Linked List (middle_of_the_linked_list)

; 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: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #4
  store ptr null, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #4
  %5 = call noalias noundef nonnull ptr @_Znwm(i64 noundef 1) #5
  store ptr %5, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #4
  store i32 5, ptr %4, align 4, !tbaa !9
  br label %6

6:                                                ; preds = %17, %0
  %7 = load i32, ptr %4, align 4, !tbaa !9
  %8 = icmp sgt i32 %7, 0
  br i1 %8, label %10, label %9

9:                                                ; preds = %6
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #4
  br label %20

10:                                               ; preds = %6
  %11 = load ptr, ptr %3, align 8, !tbaa !5
  %12 = load i32, ptr %4, align 4, !tbaa !9
  call void @_ZN13NodeOperation8pushNodeEPP4Nodei(ptr noundef nonnull align 1 dereferenceable(1) %11, ptr noundef %2, i32 noundef %12)
  %13 = load ptr, ptr %3, align 8, !tbaa !5
  %14 = load ptr, ptr %2, align 8, !tbaa !5
  call void @_ZN13NodeOperation9printNodeEP4Node(ptr noundef nonnull align 1 dereferenceable(1) %13, ptr noundef %14)
  %15 = load ptr, ptr %3, align 8, !tbaa !5
  %16 = load ptr, ptr %2, align 8, !tbaa !5
  call void @_ZN13NodeOperation11printMiddleEP4Node(ptr noundef nonnull align 1 dereferenceable(1) %15, ptr noundef %16)
  br label %17

17:                                               ; preds = %10
  %18 = load i32, ptr %4, align 4, !tbaa !9
  %19 = add nsw i32 %18, -1
  store i32 %19, ptr %4, align 4, !tbaa !9
  br label %6, !llvm.loop !11

20:                                               ; preds = %9
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #4
  ret i32 0
}

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

; Function Attrs: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znwm(i64 noundef) #2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN13NodeOperation8pushNodeEPP4Nodei(ptr noundef nonnull align 1 dereferenceable(1), ptr noundef, i32 noundef) #3 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN13NodeOperation9printNodeEP4Node(ptr noundef nonnull align 1 dereferenceable(1), ptr noundef) #3 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN13NodeOperation11printMiddleEP4Node(ptr noundef nonnull align 1 dereferenceable(1), ptr noundef) #3 align 2

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

attributes #0 = { mustprogress norecurse 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 = { nobuiltin allocsize(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 #3 = { mustprogress 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 #4 = { nounwind }
attributes #5 = { builtin allocsize(0) }

!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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; 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 norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca ptr, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #4
  store ptr null, ptr %1, align 8, !tbaa !5
  %2 = tail call noalias noundef nonnull dereferenceable(1) ptr @_Znwm(i64 noundef 1) #5
  call void @_ZN13NodeOperation8pushNodeEPP4Nodei(ptr noundef nonnull align 1 dereferenceable(1) %2, ptr noundef nonnull %1, i32 noundef 5)
  %3 = load ptr, ptr %1, align 8, !tbaa !5
  call void @_ZN13NodeOperation9printNodeEP4Node(ptr noundef nonnull align 1 dereferenceable(1) %2, ptr noundef %3)
  %4 = load ptr, ptr %1, align 8, !tbaa !5
  call void @_ZN13NodeOperation11printMiddleEP4Node(ptr noundef nonnull align 1 dereferenceable(1) %2, ptr noundef %4)
  call void @_ZN13NodeOperation8pushNodeEPP4Nodei(ptr noundef nonnull align 1 dereferenceable(1) %2, ptr noundef nonnull %1, i32 noundef 4)
  %5 = load ptr, ptr %1, align 8, !tbaa !5
  call void @_ZN13NodeOperation9printNodeEP4Node(ptr noundef nonnull align 1 dereferenceable(1) %2, ptr noundef %5)
  %6 = load ptr, ptr %1, align 8, !tbaa !5
  call void @_ZN13NodeOperation11printMiddleEP4Node(ptr noundef nonnull align 1 dereferenceable(1) %2, ptr noundef %6)
  call void @_ZN13NodeOperation8pushNodeEPP4Nodei(ptr noundef nonnull align 1 dereferenceable(1) %2, ptr noundef nonnull %1, i32 noundef 3)
  %7 = load ptr, ptr %1, align 8, !tbaa !5
  call void @_ZN13NodeOperation9printNodeEP4Node(ptr noundef nonnull align 1 dereferenceable(1) %2, ptr noundef %7)
  %8 = load ptr, ptr %1, align 8, !tbaa !5
  call void @_ZN13NodeOperation11printMiddleEP4Node(ptr noundef nonnull align 1 dereferenceable(1) %2, ptr noundef %8)
  call void @_ZN13NodeOperation8pushNodeEPP4Nodei(ptr noundef nonnull align 1 dereferenceable(1) %2, ptr noundef nonnull %1, i32 noundef 2)
  %9 = load ptr, ptr %1, align 8, !tbaa !5
  call void @_ZN13NodeOperation9printNodeEP4Node(ptr noundef nonnull align 1 dereferenceable(1) %2, ptr noundef %9)
  %10 = load ptr, ptr %1, align 8, !tbaa !5
  call void @_ZN13NodeOperation11printMiddleEP4Node(ptr noundef nonnull align 1 dereferenceable(1) %2, ptr noundef %10)
  call void @_ZN13NodeOperation8pushNodeEPP4Nodei(ptr noundef nonnull align 1 dereferenceable(1) %2, ptr noundef nonnull %1, i32 noundef 1)
  %11 = load ptr, ptr %1, align 8, !tbaa !5
  call void @_ZN13NodeOperation9printNodeEP4Node(ptr noundef nonnull align 1 dereferenceable(1) %2, ptr noundef %11)
  %12 = load ptr, ptr %1, align 8, !tbaa !5
  call void @_ZN13NodeOperation11printMiddleEP4Node(ptr noundef nonnull align 1 dereferenceable(1) %2, ptr noundef %12)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %1) #4
  ret i32 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: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znwm(i64 noundef) local_unnamed_addr #2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN13NodeOperation8pushNodeEPP4Nodei(ptr noundef nonnull align 1 dereferenceable(1), ptr noundef, i32 noundef) local_unnamed_addr #3 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN13NodeOperation9printNodeEP4Node(ptr noundef nonnull align 1 dereferenceable(1), ptr noundef) local_unnamed_addr #3 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN13NodeOperation11printMiddleEP4Node(ptr noundef nonnull align 1 dereferenceable(1), ptr noundef) local_unnamed_addr #3 align 2

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

attributes #0 = { mustprogress norecurse 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 = { nobuiltin allocsize(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 #3 = { mustprogress 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 #4 = { nounwind }
attributes #5 = { builtin allocsize(0) }

!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++ TBAA"}


; Effective O3 passes: GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LoopRotatePass,SROAPass,SimplifyCFGPass,TailCallElimPass