; LLVM IR from MakeContributions/DSA :: algorithms/CPlusPlus/Linked-Lists/circular.ll (Z9insertioniP4Node)

; 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.Node = type { i32, ptr }

; Function Attrs: mustprogress uwtable
define dso_local noundef ptr @_Z9insertioniP4Node(i32 noundef %0, ptr noundef %1) #0 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 ptr, align 8
  %8 = alloca i32, align 4
  %9 = alloca ptr, align 8
  %10 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #5
  %11 = call noalias noundef nonnull ptr @_Znwm(i64 noundef 16) #6
  %12 = load i32, ptr %4, align 4, !tbaa !5
  invoke void @_ZN4NodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16) %11, i32 noundef %12)
          to label %13 unwind label %22

13:                                               ; preds = %2
  store ptr %11, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #5
  %14 = load ptr, ptr %5, align 8, !tbaa !9
  store ptr %14, ptr %9, align 8, !tbaa !9
  %15 = load ptr, ptr %5, align 8, !tbaa !9
  %16 = icmp eq ptr %15, null
  br i1 %16, label %17, label %26

17:                                               ; preds = %13
  %18 = load ptr, ptr %6, align 8, !tbaa !9
  %19 = load ptr, ptr %6, align 8, !tbaa !9
  %20 = getelementptr inbounds %struct.Node, ptr %19, i32 0, i32 1
  store ptr %18, ptr %20, align 8, !tbaa !11
  %21 = load ptr, ptr %6, align 8, !tbaa !9
  store ptr %21, ptr %3, align 8
  store i32 1, ptr %10, align 4
  br label %47

22:                                               ; preds = %2
  %23 = landingpad { ptr, i32 }
          cleanup
  %24 = extractvalue { ptr, i32 } %23, 0
  store ptr %24, ptr %7, align 8
  %25 = extractvalue { ptr, i32 } %23, 1
  store i32 %25, ptr %8, align 4
  call void @_ZdlPvm(ptr noundef %11, i64 noundef 16) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #5
  br label %49

26:                                               ; preds = %13
  br label %27

27:                                               ; preds = %33, %26
  %28 = load ptr, ptr %9, align 8, !tbaa !9
  %29 = getelementptr inbounds %struct.Node, ptr %28, i32 0, i32 1
  %30 = load ptr, ptr %29, align 8, !tbaa !11
  %31 = load ptr, ptr %5, align 8, !tbaa !9
  %32 = icmp ne ptr %30, %31
  br i1 %32, label %33, label %37

33:                                               ; preds = %27
  %34 = load ptr, ptr %9, align 8, !tbaa !9
  %35 = getelementptr inbounds %struct.Node, ptr %34, i32 0, i32 1
  %36 = load ptr, ptr %35, align 8, !tbaa !11
  store ptr %36, ptr %9, align 8, !tbaa !9
  br label %27, !llvm.loop !13

37:                                               ; preds = %27
  %38 = load ptr, ptr %9, align 8, !tbaa !9
  %39 = getelementptr inbounds %struct.Node, ptr %38, i32 0, i32 1
  %40 = load ptr, ptr %39, align 8, !tbaa !11
  %41 = load ptr, ptr %6, align 8, !tbaa !9
  %42 = getelementptr inbounds %struct.Node, ptr %41, i32 0, i32 1
  store ptr %40, ptr %42, align 8, !tbaa !11
  %43 = load ptr, ptr %6, align 8, !tbaa !9
  %44 = load ptr, ptr %9, align 8, !tbaa !9
  %45 = getelementptr inbounds %struct.Node, ptr %44, i32 0, i32 1
  store ptr %43, ptr %45, align 8, !tbaa !11
  %46 = load ptr, ptr %5, align 8, !tbaa !9
  store ptr %46, ptr %3, align 8
  store i32 1, ptr %10, align 4
  br label %47

47:                                               ; preds = %37, %17
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #5
  %48 = load ptr, ptr %3, align 8
  ret ptr %48

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

; 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !10, i64 8}
!12 = !{!"_ZTS4Node", !6, i64 0, !10, 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: mustprogress uwtable
define dso_local noundef ptr @_Z9insertioniP4Node(i32 noundef %0, ptr noundef %1) local_unnamed_addr #0 personality ptr @__gxx_personality_v0 {
  %3 = tail call noalias noundef nonnull dereferenceable(16) ptr @_Znwm(i64 noundef 16) #3
  tail call void @_ZN4NodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16) %3, i32 noundef %0)
  %4 = icmp eq ptr %1, null
  br i1 %4, label %9, label %.preheader

.preheader:                                       ; preds = %2, %.preheader
  %.0 = phi ptr [ %6, %.preheader ], [ %1, %2 ]
  %5 = getelementptr inbounds i8, ptr %.0, i64 8
  %6 = load ptr, ptr %5, align 8, !tbaa !5
  %.not = icmp eq ptr %6, %1
  br i1 %.not, label %7, label %.preheader, !llvm.loop !11

7:                                                ; preds = %.preheader
  %8 = getelementptr inbounds i8, ptr %3, i64 8
  store ptr %6, ptr %8, align 8, !tbaa !5
  br label %9

9:                                                ; preds = %2, %7
  %.0.pn = phi ptr [ %.0, %7 ], [ %3, %2 ]
  %.014 = phi ptr [ %1, %7 ], [ %3, %2 ]
  %.sink = getelementptr inbounds i8, ptr %.0.pn, i64 8
  store ptr %3, ptr %.sink, align 8, !tbaa !5
  ret ptr %.014
}

; 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, !10, i64 8}
!6 = !{!"_ZTS4Node", !7, i64 0, !10, i64 8}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


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