; LLVM IR from ravireddy07/cpp-book :: src/Leetcode (1206_design-skiplist)

; 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.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }

@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str = external hidden unnamed_addr constant [2 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #0 personality ptr @__gxx_personality_v0 {
  %1 = alloca i32, align 4
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i8, align 1
  %6 = alloca i8, align 1
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #7
  %7 = call noalias noundef nonnull ptr @_Znwm(i64 noundef 32) #8
  invoke void @_ZN8SkiplistC2Ev(ptr noundef nonnull align 8 dereferenceable(32) %7)
          to label %8 unwind label %28

8:                                                ; preds = %0
  store ptr %7, ptr %2, align 8, !tbaa !5
  %9 = load ptr, ptr %2, align 8, !tbaa !5
  call void @_ZN8Skiplist3addEi(ptr noundef nonnull align 8 dereferenceable(32) %9, i32 noundef 1)
  %10 = load ptr, ptr %2, align 8, !tbaa !5
  call void @_ZN8Skiplist3addEi(ptr noundef nonnull align 8 dereferenceable(32) %10, i32 noundef 2)
  %11 = load ptr, ptr %2, align 8, !tbaa !5
  call void @_ZN8Skiplist3addEi(ptr noundef nonnull align 8 dereferenceable(32) %11, i32 noundef 3)
  call void @llvm.lifetime.start.p0(i64 1, ptr %5) #7
  %12 = load ptr, ptr %2, align 8, !tbaa !5
  %13 = call noundef zeroext i1 @_ZN8Skiplist6searchEi(ptr noundef nonnull align 8 dereferenceable(32) %12, i32 noundef 0)
  %14 = zext i1 %13 to i8
  store i8 %14, ptr %5, align 1, !tbaa !9
  %15 = load ptr, ptr %2, align 8, !tbaa !5
  call void @_ZN8Skiplist3addEi(ptr noundef nonnull align 8 dereferenceable(32) %15, i32 noundef 0)
  %16 = load ptr, ptr %2, align 8, !tbaa !5
  call void @_ZN8Skiplist3addEi(ptr noundef nonnull align 8 dereferenceable(32) %16, i32 noundef 4)
  call void @llvm.lifetime.start.p0(i64 1, ptr %6) #7
  %17 = load ptr, ptr %2, align 8, !tbaa !5
  %18 = call noundef zeroext i1 @_ZN8Skiplist5eraseEi(ptr noundef nonnull align 8 dereferenceable(32) %17, i32 noundef 0)
  %19 = zext i1 %18 to i8
  store i8 %19, ptr %6, align 1, !tbaa !9
  %20 = load i8, ptr %5, align 1, !tbaa !9, !range !11, !noundef !12
  %21 = trunc i8 %20 to i1
  %22 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEb(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i1 noundef zeroext %21)
  %23 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %22, ptr noundef @.str)
  %24 = load i8, ptr %6, align 1, !tbaa !9, !range !11, !noundef !12
  %25 = trunc i8 %24 to i1
  %26 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEb(ptr noundef nonnull align 8 dereferenceable(8) %23, i1 noundef zeroext %25)
  %27 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %26, ptr noundef @.str.1)
  call void @llvm.lifetime.end.p0(i64 1, ptr %6) #7
  call void @llvm.lifetime.end.p0(i64 1, ptr %5) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #7
  ret i32 0

28:                                               ; preds = %0
  %29 = landingpad { ptr, i32 }
          cleanup
  %30 = extractvalue { ptr, i32 } %29, 0
  store ptr %30, ptr %3, align 8
  %31 = extractvalue { ptr, i32 } %29, 1
  store i32 %31, ptr %4, align 4
  call void @_ZdlPvm(ptr noundef %7, i64 noundef 32) #9
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #7
  br label %32

32:                                               ; preds = %28
  %33 = load ptr, ptr %3, align 8
  %34 = load i32, ptr %4, align 4
  %35 = insertvalue { ptr, i32 } poison, ptr %33, 0
  %36 = insertvalue { ptr, i32 } %35, i32 %34, 1
  resume { ptr, i32 } %36
}

; 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 uwtable
declare dso_local void @_ZN8SkiplistC2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #3 align 2

declare i32 @__gxx_personality_v0(...)

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

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN8Skiplist3addEi(ptr noundef nonnull align 8 dereferenceable(32), i32 noundef) #3 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN8Skiplist6searchEi(ptr noundef nonnull align 8 dereferenceable(32), i32 noundef) #5 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN8Skiplist5eraseEi(ptr noundef nonnull align 8 dereferenceable(32), i32 noundef) #5 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) #6

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEb(ptr noundef nonnull align 8 dereferenceable(8), i1 noundef zeroext) #3 align 2

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

attributes #0 = { 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 #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 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 = { 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 #6 = { inlinehint 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 #7 = { nounwind }
attributes #8 = { builtin allocsize(0) }
attributes #9 = { 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 = !{!"bool", !7, i64 0}
!11 = !{i8 0, i8 2}
!12 = !{}


; 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"

%"class.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }

@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str = external hidden unnamed_addr constant [2 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 personality ptr @__gxx_personality_v0 {
  %1 = tail call noalias noundef nonnull dereferenceable(32) ptr @_Znwm(i64 noundef 32) #6
  invoke void @_ZN8SkiplistC2Ev(ptr noundef nonnull align 8 dereferenceable(32) %1)
          to label %2 unwind label %9

2:                                                ; preds = %0
  tail call void @_ZN8Skiplist3addEi(ptr noundef nonnull align 8 dereferenceable(32) %1, i32 noundef 1)
  tail call void @_ZN8Skiplist3addEi(ptr noundef nonnull align 8 dereferenceable(32) %1, i32 noundef 2)
  tail call void @_ZN8Skiplist3addEi(ptr noundef nonnull align 8 dereferenceable(32) %1, i32 noundef 3)
  %3 = tail call noundef zeroext i1 @_ZN8Skiplist6searchEi(ptr noundef nonnull align 8 dereferenceable(32) %1, i32 noundef 0)
  tail call void @_ZN8Skiplist3addEi(ptr noundef nonnull align 8 dereferenceable(32) %1, i32 noundef 0)
  tail call void @_ZN8Skiplist3addEi(ptr noundef nonnull align 8 dereferenceable(32) %1, i32 noundef 4)
  %4 = tail call noundef zeroext i1 @_ZN8Skiplist5eraseEi(ptr noundef nonnull align 8 dereferenceable(32) %1, i32 noundef 0)
  %5 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEb(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i1 noundef zeroext %3)
  %6 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %5, ptr noundef nonnull @.str)
  %7 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEb(ptr noundef nonnull align 8 dereferenceable(8) %6, i1 noundef zeroext %4)
  %8 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %7, ptr noundef nonnull @.str.1)
  ret i32 0

9:                                                ; preds = %0
  %10 = landingpad { ptr, i32 }
          cleanup
  tail call void @_ZdlPvm(ptr noundef nonnull %1, i64 noundef 32) #7
  resume { ptr, i32 } %10
}

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

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN8SkiplistC2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #2 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: nobuiltin nounwind
declare void @_ZdlPvm(ptr noundef, i64 noundef) local_unnamed_addr #3

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN8Skiplist3addEi(ptr noundef nonnull align 8 dereferenceable(32), i32 noundef) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN8Skiplist6searchEi(ptr noundef nonnull align 8 dereferenceable(32), i32 noundef) local_unnamed_addr #4 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN8Skiplist5eraseEi(ptr noundef nonnull align 8 dereferenceable(32), i32 noundef) local_unnamed_addr #4 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) local_unnamed_addr #5

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEb(ptr noundef nonnull align 8 dereferenceable(8), i1 noundef zeroext) local_unnamed_addr #2 align 2

attributes #0 = { 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 #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 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 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 #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 = { inlinehint 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 #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)"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,SROAPass,SimplifyCFGPass,TailCallElimPass