; LLVM IR from smv1999/CompetitiveProgrammingQuestionBank :: Data Structures/Linked Lists/Singly Linked List (oddEvenLinkedList)

; 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.ListNode = type { i32, ptr }

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef ptr @_Z11oddEvenListP8ListNode(ptr noundef) #0

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

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

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z9printListP8ListNode(ptr noundef) #2

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #3 personality ptr @__gxx_personality_v0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #6
  store i32 1, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #6
  %8 = call noalias noundef nonnull ptr @_Znwm(i64 noundef 16) #7
  %9 = load i32, ptr %2, align 4, !tbaa !5
  invoke void @_ZN8ListNodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16) %8, i32 noundef %9)
          to label %10 unwind label %16

10:                                               ; preds = %0
  store ptr %8, ptr %3, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #6
  %11 = load ptr, ptr %3, align 8, !tbaa !9
  store ptr %11, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #6
  store i32 2, ptr %7, align 4, !tbaa !5
  br label %12

12:                                               ; preds = %29, %10
  %13 = load i32, ptr %7, align 4, !tbaa !5
  %14 = icmp sle i32 %13, 5
  br i1 %14, label %20, label %15

15:                                               ; preds = %12
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #6
  br label %36

16:                                               ; preds = %0
  %17 = landingpad { ptr, i32 }
          cleanup
  %18 = extractvalue { ptr, i32 } %17, 0
  store ptr %18, ptr %4, align 8
  %19 = extractvalue { ptr, i32 } %17, 1
  store i32 %19, ptr %5, align 4
  call void @_ZdlPvm(ptr noundef %8, i64 noundef 16) #8
  br label %40

20:                                               ; preds = %12
  %21 = call noalias noundef nonnull ptr @_Znwm(i64 noundef 16) #7
  %22 = load i32, ptr %7, align 4, !tbaa !5
  invoke void @_ZN8ListNodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16) %21, i32 noundef %22)
          to label %23 unwind label %32

23:                                               ; preds = %20
  %24 = load ptr, ptr %6, align 8, !tbaa !9
  %25 = getelementptr inbounds %struct.ListNode, ptr %24, i32 0, i32 1
  store ptr %21, ptr %25, align 8, !tbaa !11
  %26 = load ptr, ptr %6, align 8, !tbaa !9
  %27 = getelementptr inbounds %struct.ListNode, ptr %26, i32 0, i32 1
  %28 = load ptr, ptr %27, align 8, !tbaa !11
  store ptr %28, ptr %6, align 8, !tbaa !9
  br label %29

29:                                               ; preds = %23
  %30 = load i32, ptr %7, align 4, !tbaa !5
  %31 = add nsw i32 %30, 1
  store i32 %31, ptr %7, align 4, !tbaa !5
  br label %12, !llvm.loop !13

32:                                               ; preds = %20
  %33 = landingpad { ptr, i32 }
          cleanup
  %34 = extractvalue { ptr, i32 } %33, 0
  store ptr %34, ptr %4, align 8
  %35 = extractvalue { ptr, i32 } %33, 1
  store i32 %35, ptr %5, align 4
  call void @_ZdlPvm(ptr noundef %21, i64 noundef 16) #8
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #6
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #6
  br label %40

36:                                               ; preds = %15
  %37 = load ptr, ptr %3, align 8, !tbaa !9
  %38 = call noundef ptr @_Z11oddEvenListP8ListNode(ptr noundef %37)
  store ptr %38, ptr %3, align 8, !tbaa !9
  %39 = load ptr, ptr %3, align 8, !tbaa !9
  call void @_Z9printListP8ListNode(ptr noundef %39)
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #6
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #6
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #6
  ret i32 0

40:                                               ; preds = %32, %16
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #6
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #6
  br label %41

41:                                               ; preds = %40
  %42 = load ptr, ptr %4, align 8
  %43 = load i32, ptr %5, align 4
  %44 = insertvalue { ptr, i32 } poison, ptr %42, 0
  %45 = insertvalue { ptr, i32 } %44, i32 %43, 1
  resume { ptr, i32 } %45
}

; Function Attrs: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znwm(i64 noundef) #4

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN8ListNodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16), i32 noundef) unnamed_addr #0 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: nobuiltin nounwind
declare void @_ZdlPvm(ptr noundef, i64 noundef) #5

attributes #0 = { 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #3 = { mustprogress norecurse 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 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 #5 = { 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 #6 = { nounwind }
attributes #7 = { builtin allocsize(0) }
attributes #8 = { 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 = !{!"_ZTS8ListNode", !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 nounwind uwtable
declare dso_local noundef ptr @_Z11oddEvenListP8ListNode(ptr noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z9printListP8ListNode(ptr noundef) local_unnamed_addr #1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #2 personality ptr @__gxx_personality_v0 {
  %1 = tail call noalias noundef nonnull dereferenceable(16) ptr @_Znwm(i64 noundef 16) #4
  tail call void @_ZN8ListNodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16) %1, i32 noundef 1)
  %2 = tail call noalias noundef nonnull dereferenceable(16) ptr @_Znwm(i64 noundef 16) #4
  tail call void @_ZN8ListNodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16) %2, i32 noundef 2)
  %3 = getelementptr inbounds i8, ptr %1, i64 8
  store ptr %2, ptr %3, align 8, !tbaa !5
  %4 = tail call noalias noundef nonnull dereferenceable(16) ptr @_Znwm(i64 noundef 16) #4
  tail call void @_ZN8ListNodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16) %4, i32 noundef 3)
  %5 = getelementptr inbounds i8, ptr %2, i64 8
  store ptr %4, ptr %5, align 8, !tbaa !5
  %6 = tail call noalias noundef nonnull dereferenceable(16) ptr @_Znwm(i64 noundef 16) #4
  tail call void @_ZN8ListNodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16) %6, i32 noundef 4)
  %7 = getelementptr inbounds i8, ptr %4, i64 8
  store ptr %6, ptr %7, align 8, !tbaa !5
  %8 = tail call noalias noundef nonnull dereferenceable(16) ptr @_Znwm(i64 noundef 16) #4
  tail call void @_ZN8ListNodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16) %8, i32 noundef 5)
  %9 = getelementptr inbounds i8, ptr %6, i64 8
  store ptr %8, ptr %9, align 8, !tbaa !5
  %10 = tail call noundef ptr @_Z11oddEvenListP8ListNode(ptr noundef nonnull %1)
  tail call void @_Z9printListP8ListNode(ptr noundef %10)
  ret i32 0
}

; Function Attrs: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znwm(i64 noundef) local_unnamed_addr #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN8ListNodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16), i32 noundef) unnamed_addr #0 align 2

declare i32 @__gxx_personality_v0(...)

attributes #0 = { 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 #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 norecurse 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 = { 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 #4 = { 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 = !{!"_ZTS8ListNode", !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}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LoopRotatePass,SROAPass,SimplifyCFGPass,TailCallElimPass