; LLVM IR from ritikbanger/Hacktoberfest2022-DSA :: 10. Linked List/cpp/Linked List Complete.ll (Z15insertAtHeadCllRP7nodeClli)

; 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.nodeCll = type { i32, 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
define dso_local void @_Z15insertAtHeadCllRP7nodeClli(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 i32, align 4
  %9 = alloca ptr, 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 8, ptr %5) #5
  %10 = call noalias noundef nonnull ptr @_Znwm(i64 noundef 16) #6
  %11 = load i32, ptr %4, align 4, !tbaa !9
  invoke void @_ZN7nodeCllC2Ei(ptr noundef nonnull align 8 dereferenceable(16) %10, i32 noundef %11)
          to label %12 unwind label %22

12:                                               ; preds = %2
  store ptr %10, ptr %5, align 8, !tbaa !5
  %13 = load ptr, ptr %3, align 8, !tbaa !5
  %14 = load ptr, ptr %13, align 8, !tbaa !5
  %15 = icmp eq ptr %14, null
  br i1 %15, label %16, label %26

16:                                               ; preds = %12
  %17 = load ptr, ptr %5, align 8, !tbaa !5
  %18 = load ptr, ptr %5, align 8, !tbaa !5
  %19 = getelementptr inbounds %class.nodeCll, ptr %18, i32 0, i32 1
  store ptr %17, ptr %19, align 8, !tbaa !11
  %20 = load ptr, ptr %5, align 8, !tbaa !5
  %21 = load ptr, ptr %3, align 8, !tbaa !5
  store ptr %20, ptr %21, align 8, !tbaa !5
  store i32 1, ptr %8, align 4
  br label %47

22:                                               ; preds = %2
  %23 = landingpad { ptr, i32 }
          cleanup
  %24 = extractvalue { ptr, i32 } %23, 0
  store ptr %24, ptr %6, align 8
  %25 = extractvalue { ptr, i32 } %23, 1
  store i32 %25, ptr %7, align 4
  call void @_ZdlPvm(ptr noundef %10, i64 noundef 16) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #5
  br label %50

26:                                               ; preds = %12
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #5
  %27 = load ptr, ptr %3, align 8, !tbaa !5
  %28 = load ptr, ptr %27, align 8, !tbaa !5
  store ptr %28, ptr %9, align 8, !tbaa !5
  br label %29

29:                                               ; preds = %36, %26
  %30 = load ptr, ptr %9, align 8, !tbaa !5
  %31 = getelementptr inbounds %class.nodeCll, ptr %30, i32 0, i32 1
  %32 = load ptr, ptr %31, align 8, !tbaa !11
  %33 = load ptr, ptr %3, align 8, !tbaa !5
  %34 = load ptr, ptr %33, align 8, !tbaa !5
  %35 = icmp ne ptr %32, %34
  br i1 %35, label %36, label %40

36:                                               ; preds = %29
  %37 = load ptr, ptr %9, align 8, !tbaa !5
  %38 = getelementptr inbounds %class.nodeCll, ptr %37, i32 0, i32 1
  %39 = load ptr, ptr %38, align 8, !tbaa !11
  store ptr %39, ptr %9, align 8, !tbaa !5
  br label %29, !llvm.loop !13

40:                                               ; preds = %29
  %41 = load ptr, ptr %3, align 8, !tbaa !5
  %42 = load ptr, ptr %41, align 8, !tbaa !5
  %43 = load ptr, ptr %5, align 8, !tbaa !5
  %44 = getelementptr inbounds %class.nodeCll, ptr %43, i32 0, i32 1
  store ptr %42, ptr %44, align 8, !tbaa !11
  %45 = load ptr, ptr %5, align 8, !tbaa !5
  %46 = load ptr, ptr %3, align 8, !tbaa !5
  store ptr %45, ptr %46, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #5
  store i32 0, ptr %8, align 4
  br label %47

47:                                               ; preds = %40, %16
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #5
  %48 = load i32, ptr %8, align 4
  switch i32 %48, label %55 [
    i32 0, label %49
    i32 1, label %49
  ]

49:                                               ; preds = %47, %47
  ret void

50:                                               ; preds = %22
  %51 = load ptr, ptr %6, align 8
  %52 = load i32, ptr %7, align 4
  %53 = insertvalue { ptr, i32 } poison, ptr %51, 0
  %54 = insertvalue { ptr, i32 } %53, i32 %52, 1
  resume { ptr, i32 } %54

55:                                               ; preds = %47
  unreachable
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN7nodeCllC2Ei(ptr noundef nonnull align 8 dereferenceable(16), i32 noundef) unnamed_addr #4 align 2

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 8}
!12 = !{!"_ZTS7nodeCll", !10, i64 0, !6, i64 8}
!13 = distinct !{!13, !14}
!14 = !{!"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: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znwm(i64 noundef) local_unnamed_addr #0

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress uwtable
define dso_local void @_Z15insertAtHeadCllRP7nodeClli(ptr nocapture noundef nonnull align 8 dereferenceable(8) %0, i32 noundef %1) local_unnamed_addr #1 personality ptr @__gxx_personality_v0 {
  %3 = tail call noalias noundef nonnull dereferenceable(16) ptr @_Znwm(i64 noundef 16) #3
  tail call void @_ZN7nodeCllC2Ei(ptr noundef nonnull align 8 dereferenceable(16) %3, i32 noundef %1)
  %4 = load ptr, ptr %0, align 8, !tbaa !5
  %5 = icmp eq ptr %4, null
  %6 = getelementptr inbounds i8, ptr %3, i64 8
  %. = select i1 %5, ptr %3, ptr %4
  store ptr %., ptr %6, align 8, !tbaa !9
  store ptr %3, ptr %0, align 8, !tbaa !5
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN7nodeCllC2Ei(ptr noundef nonnull align 8 dereferenceable(16), i32 noundef) unnamed_addr #2 align 2

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 8}
!10 = !{!"_ZTS7nodeCll", !11, i64 0, !6, i64 8}
!11 = !{!"int", !7, i64 0}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,LoopSimplifyPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass