; LLVM IR from MinhasKamal/AlgorithmImplementations :: dataStructures/listImplementation/OneWayLinkedList.ll/Z9searchingNSt7 (cxx114listIiSaIiEEEi)

; 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.std::_List_iterator" = type { ptr }

; 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: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z9searchingNSt7__cxx114listIiSaIiEEEi(ptr noundef %0, i32 noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca %"struct.std::_List_iterator", align 8
  %7 = alloca %"struct.std::_List_iterator", align 8
  %8 = alloca %"struct.std::_List_iterator", align 8
  %9 = alloca %"struct.std::_List_iterator", align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  store i32 0, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  call void @_ZNSt14_List_iteratorIiEC2Ev(ptr noundef nonnull align 8 dereferenceable(8) %6) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %10 = call ptr @_ZNSt7__cxx114listIiSaIiEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #3
  %11 = getelementptr inbounds %"struct.std::_List_iterator", ptr %7, i32 0, i32 0
  store ptr %10, ptr %11, align 8
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %6, ptr align 8 %7, i64 8, i1 false), !tbaa.struct !11
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  br label %12

12:                                               ; preds = %25, %2
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %13 = call ptr @_ZNSt7__cxx114listIiSaIiEE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #3
  %14 = getelementptr inbounds %"struct.std::_List_iterator", ptr %8, i32 0, i32 0
  store ptr %13, ptr %14, align 8
  %15 = call noundef zeroext i1 @_ZStneRKSt14_List_iteratorIiES2_(ptr noundef nonnull align 8 dereferenceable(8) %6, ptr noundef nonnull align 8 dereferenceable(8) %8) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  br i1 %15, label %16, label %28

16:                                               ; preds = %12
  %17 = load i32, ptr %4, align 4, !tbaa !9
  %18 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt14_List_iteratorIiEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %6) #3
  %19 = load i32, ptr %18, align 4, !tbaa !9
  %20 = icmp eq i32 %17, %19
  br i1 %20, label %21, label %24

21:                                               ; preds = %16
  %22 = load i32, ptr %5, align 4, !tbaa !9
  %23 = add nsw i32 %22, 1
  store i32 %23, ptr %5, align 4, !tbaa !9
  br label %24

24:                                               ; preds = %21, %16
  br label %25

25:                                               ; preds = %24
  %26 = call ptr @_ZNSt14_List_iteratorIiEppEi(ptr noundef nonnull align 8 dereferenceable(8) %6, i32 noundef 0) #3
  %27 = getelementptr inbounds %"struct.std::_List_iterator", ptr %9, i32 0, i32 0
  store ptr %26, ptr %27, align 8
  br label %12, !llvm.loop !12

28:                                               ; preds = %12
  %29 = load i32, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  ret i32 %29
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt14_List_iteratorIiEC2Ev(ptr noundef nonnull align 8 dereferenceable(8)) unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt7__cxx114listIiSaIiEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) #1 align 2

; 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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZStneRKSt14_List_iteratorIiES2_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt7__cxx114listIiSaIiEE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt14_List_iteratorIiEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt14_List_iteratorIiEppEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) #1 align 2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress 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 = { 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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{i64 0, i64 8, !5}
!12 = distinct !{!12, !13}
!13 = !{!"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"

%"struct.std::_List_iterator" = type { ptr }

; 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: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z9searchingNSt7__cxx114listIiSaIiEEEi(ptr noundef %0, i32 noundef %1) local_unnamed_addr #1 {
  %3 = alloca %"struct.std::_List_iterator", align 8
  %4 = alloca %"struct.std::_List_iterator", align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #2
  call void @_ZNSt14_List_iteratorIiEC2Ev(ptr noundef nonnull align 8 dereferenceable(8) %3) #2
  %5 = call ptr @_ZNSt7__cxx114listIiSaIiEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #2
  store ptr %5, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #2
  %6 = call ptr @_ZNSt7__cxx114listIiSaIiEE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #2
  store ptr %6, ptr %4, align 8
  %7 = call noundef zeroext i1 @_ZStneRKSt14_List_iteratorIiES2_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(8) %4) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #2
  br i1 %7, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %2, %.lr.ph
  %.04 = phi i32 [ %spec.select, %.lr.ph ], [ 0, %2 ]
  %8 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt14_List_iteratorIiEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %3) #2
  %9 = load i32, ptr %8, align 4, !tbaa !9
  %10 = icmp eq i32 %9, %1
  %11 = zext i1 %10 to i32
  %spec.select = add nuw nsw i32 %.04, %11
  %12 = call ptr @_ZNSt14_List_iteratorIiEppEi(ptr noundef nonnull align 8 dereferenceable(8) %3, i32 noundef 0) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #2
  %13 = call ptr @_ZNSt7__cxx114listIiSaIiEE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #2
  store ptr %13, ptr %4, align 8
  %14 = call noundef zeroext i1 @_ZStneRKSt14_List_iteratorIiES2_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(8) %4) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #2
  br i1 %14, label %.lr.ph, label %._crit_edge, !llvm.loop !11

._crit_edge:                                      ; preds = %.lr.ph, %2
  %.0.lcssa = phi i32 [ 0, %2 ], [ %spec.select, %.lr.ph ]
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #2
  ret i32 %.0.lcssa
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt14_List_iteratorIiEC2Ev(ptr noundef nonnull align 8 dereferenceable(8)) unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt7__cxx114listIiSaIiEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZStneRKSt14_List_iteratorIiES2_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt7__cxx114listIiSaIiEE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt14_List_iteratorIiEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt14_List_iteratorIiEppEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) local_unnamed_addr #1 align 2

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress 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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,ReassociatePass,SROAPass,SimplifyCFGPass