; LLVM IR from ritikbanger/Hacktoberfest2022-DSA :: 10. Linked List/cpp/Linked List Complete.ll (Z15insertAtTailDllRP7nodeDlli)

; 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.nodeDll = type { i32, ptr, ptr }

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

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

declare i32 @__gxx_personality_v0(...)

; Function Attrs: nobuiltin nounwind
declare void @_ZdlPvm(ptr noundef, i64 noundef) #2

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

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z15insertAtHeadDllRP7nodeDlli(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN7nodeDllC2Ei(ptr noundef nonnull align 8 dereferenceable(24), i32 noundef) unnamed_addr #4 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_Z15insertAtTailDllRP7nodeDlli(ptr noundef nonnull align 8 dereferenceable(8) %0, i32 noundef %1) #3 personality ptr @__gxx_personality_v0 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  %9 = load ptr, ptr %3, align 8, !tbaa !5
  %10 = load ptr, ptr %9, align 8, !tbaa !5
  %11 = icmp eq ptr %10, null
  br i1 %11, label %12, label %15

12:                                               ; preds = %2
  %13 = load ptr, ptr %3, align 8, !tbaa !5
  %14 = load i32, ptr %4, align 4, !tbaa !9
  call void @_Z15insertAtHeadDllRP7nodeDlli(ptr noundef nonnull align 8 dereferenceable(8) %13, i32 noundef %14)
  br label %41

15:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #5
  %16 = call noalias noundef nonnull ptr @_Znwm(i64 noundef 24) #6
  %17 = load i32, ptr %4, align 4, !tbaa !9
  invoke void @_ZN7nodeDllC2Ei(ptr noundef nonnull align 8 dereferenceable(24) %16, i32 noundef %17)
          to label %18 unwind label %30

18:                                               ; preds = %15
  store ptr %16, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #5
  %19 = load ptr, ptr %3, align 8, !tbaa !5
  %20 = load ptr, ptr %19, align 8, !tbaa !5
  store ptr %20, ptr %8, align 8, !tbaa !5
  br label %21

21:                                               ; preds = %26, %18
  %22 = load ptr, ptr %8, align 8, !tbaa !5
  %23 = getelementptr inbounds %class.nodeDll, ptr %22, i32 0, i32 2
  %24 = load ptr, ptr %23, align 8, !tbaa !11
  %25 = icmp ne ptr %24, null
  br i1 %25, label %26, label %34

26:                                               ; preds = %21
  %27 = load ptr, ptr %8, align 8, !tbaa !5
  %28 = getelementptr inbounds %class.nodeDll, ptr %27, i32 0, i32 2
  %29 = load ptr, ptr %28, align 8, !tbaa !11
  store ptr %29, ptr %8, align 8, !tbaa !5
  br label %21, !llvm.loop !13

30:                                               ; preds = %15
  %31 = landingpad { ptr, i32 }
          cleanup
  %32 = extractvalue { ptr, i32 } %31, 0
  store ptr %32, ptr %6, align 8
  %33 = extractvalue { ptr, i32 } %31, 1
  store i32 %33, ptr %7, align 4
  call void @_ZdlPvm(ptr noundef %16, i64 noundef 24) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #5
  br label %42

34:                                               ; preds = %21
  %35 = load ptr, ptr %5, align 8, !tbaa !5
  %36 = load ptr, ptr %8, align 8, !tbaa !5
  %37 = getelementptr inbounds %class.nodeDll, ptr %36, i32 0, i32 2
  store ptr %35, ptr %37, align 8, !tbaa !11
  %38 = load ptr, ptr %8, align 8, !tbaa !5
  %39 = load ptr, ptr %5, align 8, !tbaa !5
  %40 = getelementptr inbounds %class.nodeDll, ptr %39, i32 0, i32 1
  store ptr %38, ptr %40, align 8, !tbaa !15
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #5
  br label %41

41:                                               ; preds = %34, %12
  ret void

42:                                               ; preds = %30
  %43 = load ptr, ptr %6, align 8
  %44 = load i32, ptr %7, align 4
  %45 = insertvalue { ptr, i32 } poison, ptr %43, 0
  %46 = insertvalue { ptr, i32 } %45, i32 %44, 1
  resume { ptr, i32 } %46
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { 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 #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 = { 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 #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 16}
!12 = !{!"_ZTS7nodeDll", !10, i64 0, !6, i64 8, !6, i64 16}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}
!15 = !{!12, !6, i64 8}


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

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z15insertAtHeadDllRP7nodeDlli(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) local_unnamed_addr #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN7nodeDllC2Ei(ptr noundef nonnull align 8 dereferenceable(24), i32 noundef) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_Z15insertAtTailDllRP7nodeDlli(ptr noundef nonnull align 8 dereferenceable(8) %0, i32 noundef %1) local_unnamed_addr #1 personality ptr @__gxx_personality_v0 {
  %3 = load ptr, ptr %0, align 8, !tbaa !5
  %4 = icmp eq ptr %3, null
  br i1 %4, label %5, label %6

5:                                                ; preds = %2
  tail call void @_Z15insertAtHeadDllRP7nodeDlli(ptr noundef nonnull align 8 dereferenceable(8) %0, i32 noundef %1)
  br label %15

6:                                                ; preds = %2
  %7 = tail call noalias noundef nonnull dereferenceable(24) ptr @_Znwm(i64 noundef 24) #3
  tail call void @_ZN7nodeDllC2Ei(ptr noundef nonnull align 8 dereferenceable(24) %7, i32 noundef %1)
  %8 = load ptr, ptr %0, align 8, !tbaa !5
  br label %9

9:                                                ; preds = %9, %6
  %.0 = phi ptr [ %8, %6 ], [ %11, %9 ]
  %10 = getelementptr inbounds i8, ptr %.0, i64 16
  %11 = load ptr, ptr %10, align 8, !tbaa !9
  %.not = icmp eq ptr %11, null
  br i1 %.not, label %12, label %9, !llvm.loop !12

12:                                               ; preds = %9
  %13 = getelementptr inbounds i8, ptr %.0, i64 16
  store ptr %7, ptr %13, align 8, !tbaa !9
  %14 = getelementptr inbounds i8, ptr %7, i64 8
  store ptr %.0, ptr %14, align 8, !tbaa !14
  br label %15

15:                                               ; preds = %12, %5
  ret void
}

attributes #0 = { 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 #1 = { 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 #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, !6, i64 16}
!10 = !{!"_ZTS7nodeDll", !11, i64 0, !6, i64 8, !6, i64 16}
!11 = !{!"int", !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}
!14 = !{!10, !6, i64 8}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LICMPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass