; LLVM IR from codemistic/Data-Structures-and-Algorithms :: CPP/LINKED LIST/CIRCULAR LINKED LIST/circularlindedlist.ll (Z16insertatpositionRP4nodeii)

; 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"

%class.node = type { i32, ptr }

; Function Attrs: mustprogress uwtable
define dso_local void @_Z16insertatpositionRP4nodeii(ptr noundef nonnull align 8 dereferenceable(8) %0, i32 noundef %1, i32 noundef %2) #0 personality ptr @__gxx_personality_v0 {
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  %10 = alloca ptr, align 8
  %11 = alloca ptr, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  store i32 %2, ptr %6, align 4, !tbaa !9
  %12 = load ptr, ptr %4, align 8, !tbaa !5
  %13 = load ptr, ptr %12, align 8, !tbaa !5
  %14 = icmp eq ptr %13, null
  br i1 %14, label %15, label %28

15:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #5
  %16 = call noalias noundef nonnull ptr @_Znwm(i64 noundef 16) #6
  %17 = load i32, ptr %6, align 4, !tbaa !9
  invoke void @_ZN4nodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16) %16, i32 noundef %17)
          to label %18 unwind label %24

18:                                               ; preds = %15
  store ptr %16, ptr %7, align 8, !tbaa !5
  %19 = load ptr, ptr %7, align 8, !tbaa !5
  %20 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %19, ptr %20, align 8, !tbaa !5
  %21 = load ptr, ptr %7, align 8, !tbaa !5
  %22 = load ptr, ptr %7, align 8, !tbaa !5
  %23 = getelementptr inbounds %class.node, ptr %22, i32 0, i32 1
  store ptr %21, ptr %23, align 8, !tbaa !11
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #5
  br label %57

24:                                               ; preds = %15
  %25 = landingpad { ptr, i32 }
          cleanup
  %26 = extractvalue { ptr, i32 } %25, 0
  store ptr %26, ptr %8, align 8
  %27 = extractvalue { ptr, i32 } %25, 1
  store i32 %27, ptr %9, align 4
  call void @_ZdlPvm(ptr noundef %16, i64 noundef 16) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #5
  br label %58

28:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #5
  %29 = load ptr, ptr %4, align 8, !tbaa !5
  %30 = load ptr, ptr %29, align 8, !tbaa !5
  store ptr %30, ptr %10, align 8, !tbaa !5
  br label %31

31:                                               ; preds = %37, %28
  %32 = load ptr, ptr %10, align 8, !tbaa !5
  %33 = getelementptr inbounds %class.node, ptr %32, i32 0, i32 0
  %34 = load i32, ptr %33, align 8, !tbaa !13
  %35 = load i32, ptr %5, align 4, !tbaa !9
  %36 = icmp ne i32 %34, %35
  br i1 %36, label %37, label %41

37:                                               ; preds = %31
  %38 = load ptr, ptr %10, align 8, !tbaa !5
  %39 = getelementptr inbounds %class.node, ptr %38, i32 0, i32 1
  %40 = load ptr, ptr %39, align 8, !tbaa !11
  store ptr %40, ptr %10, align 8, !tbaa !5
  br label %31, !llvm.loop !14

41:                                               ; preds = %31
  call void @llvm.lifetime.start.p0(i64 8, ptr %11) #5
  %42 = call noalias noundef nonnull ptr @_Znwm(i64 noundef 16) #6
  %43 = load i32, ptr %6, align 4, !tbaa !9
  invoke void @_ZN4nodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16) %42, i32 noundef %43)
          to label %44 unwind label %53

44:                                               ; preds = %41
  store ptr %42, ptr %11, align 8, !tbaa !5
  %45 = load ptr, ptr %10, align 8, !tbaa !5
  %46 = getelementptr inbounds %class.node, ptr %45, i32 0, i32 1
  %47 = load ptr, ptr %46, align 8, !tbaa !11
  %48 = load ptr, ptr %11, align 8, !tbaa !5
  %49 = getelementptr inbounds %class.node, ptr %48, i32 0, i32 1
  store ptr %47, ptr %49, align 8, !tbaa !11
  %50 = load ptr, ptr %11, align 8, !tbaa !5
  %51 = load ptr, ptr %10, align 8, !tbaa !5
  %52 = getelementptr inbounds %class.node, ptr %51, i32 0, i32 1
  store ptr %50, ptr %52, align 8, !tbaa !11
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #5
  br label %57

53:                                               ; preds = %41
  %54 = landingpad { ptr, i32 }
          cleanup
  %55 = extractvalue { ptr, i32 } %54, 0
  store ptr %55, ptr %8, align 8
  %56 = extractvalue { ptr, i32 } %54, 1
  store i32 %56, ptr %9, align 4
  call void @_ZdlPvm(ptr noundef %42, i64 noundef 16) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #5
  br label %58

57:                                               ; preds = %44, %18
  ret void

58:                                               ; preds = %53, %24
  %59 = load ptr, ptr %8, align 8
  %60 = load i32, ptr %9, align 4
  %61 = insertvalue { ptr, i32 } poison, ptr %59, 0
  %62 = insertvalue { ptr, i32 } %61, i32 %60, 1
  resume { ptr, i32 } %62
}

; 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 nounwind uwtable
declare dso_local void @_ZN4nodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16), i32 noundef) unnamed_addr #3 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: nobuiltin nounwind
declare void @_ZdlPvm(ptr noundef, i64 noundef) #4

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

attributes #0 = { 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 #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 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 #4 = { nobuiltin 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 #5 = { nounwind }
attributes #6 = { builtin allocsize(0) }
attributes #7 = { builtin 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 = !{!12, !6, i64 8}
!12 = !{!"_ZTS4node", !10, i64 0, !6, i64 8}
!13 = !{!12, !10, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"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 uwtable
define dso_local void @_Z16insertatpositionRP4nodeii(ptr nocapture noundef nonnull align 8 dereferenceable(8) %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 personality ptr @__gxx_personality_v0 {
  %4 = load ptr, ptr %0, align 8, !tbaa !5
  %5 = icmp eq ptr %4, null
  br i1 %5, label %7, label %.preheader

.preheader:                                       ; preds = %3
  %6 = load i32, ptr %4, align 8, !tbaa !9
  %.not15 = icmp eq i32 %6, %1
  br i1 %.not15, label %._crit_edge, label %.lr.ph

7:                                                ; preds = %3
  %8 = tail call noalias noundef nonnull dereferenceable(16) ptr @_Znwm(i64 noundef 16) #3
  tail call void @_ZN4nodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16) %8, i32 noundef %2)
  store ptr %8, ptr %0, align 8, !tbaa !5
  %9 = getelementptr inbounds i8, ptr %8, i64 8
  store ptr %8, ptr %9, align 8, !tbaa !12
  br label %17

.lr.ph:                                           ; preds = %.preheader, %.lr.ph
  %.016 = phi ptr [ %11, %.lr.ph ], [ %4, %.preheader ]
  %10 = getelementptr inbounds i8, ptr %.016, i64 8
  %11 = load ptr, ptr %10, align 8, !tbaa !12
  %12 = load i32, ptr %11, align 8, !tbaa !9
  %.not = icmp eq i32 %12, %1
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !13

._crit_edge:                                      ; preds = %.lr.ph, %.preheader
  %.0.lcssa = phi ptr [ %4, %.preheader ], [ %11, %.lr.ph ]
  %13 = tail call noalias noundef nonnull dereferenceable(16) ptr @_Znwm(i64 noundef 16) #3
  tail call void @_ZN4nodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16) %13, i32 noundef %2)
  %14 = getelementptr inbounds i8, ptr %.0.lcssa, i64 8
  %15 = load ptr, ptr %14, align 8, !tbaa !12
  %16 = getelementptr inbounds i8, ptr %13, i64 8
  store ptr %15, ptr %16, align 8, !tbaa !12
  store ptr %13, ptr %14, align 8, !tbaa !12
  br label %17

17:                                               ; preds = %._crit_edge, %7
  ret void
}

; Function Attrs: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znwm(i64 noundef) local_unnamed_addr #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN4nodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16), i32 noundef) unnamed_addr #2 align 2

declare i32 @__gxx_personality_v0(...)

attributes #0 = { 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 #1 = { 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 #2 = { 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 #3 = { 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, !11, i64 0}
!10 = !{!"_ZTS4node", !11, i64 0, !6, i64 8}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !6, i64 8}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


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