; LLVM IR from Adlik/Adlik :: cub/string/str_utils.ll (ZN3cub8strutils5splitB5cxx11ENS_10StringViewES1_)

; 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::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<std::__cxx11::basic_string<char>, std::allocator<std::__cxx11::basic_string<char>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::__cxx11::basic_string<char>, std::allocator<std::__cxx11::basic_string<char>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::__cxx11::basic_string<char>, std::allocator<std::__cxx11::basic_string<char>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::__cxx11::basic_string<char>, std::allocator<std::__cxx11::basic_string<char>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"struct.cub::StringView" = type { ptr, i64 }

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #0

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN3cub8strutils5splitB5cxx11ENS_10StringViewES1_(ptr dead_on_unwind noalias writable sret(%"class.std::vector") align 8 %0, ptr %1, i64 %2, ptr %3, i64 %4) #1 personality ptr @__gxx_personality_v0 {
  %6 = alloca ptr, align 8
  %7 = alloca %"struct.cub::StringView", align 8
  %8 = alloca %"struct.cub::StringView", align 8
  %9 = alloca i1, align 1
  %10 = alloca %"struct.cub::StringView", align 8
  %11 = alloca ptr, align 8
  %12 = alloca i32, align 4
  store ptr %0, ptr %6, align 8
  %13 = getelementptr inbounds { ptr, i64 }, ptr %7, i32 0, i32 0
  store ptr %1, ptr %13, align 8
  %14 = getelementptr inbounds { ptr, i64 }, ptr %7, i32 0, i32 1
  store i64 %2, ptr %14, align 8
  %15 = getelementptr inbounds { ptr, i64 }, ptr %8, i32 0, i32 0
  store ptr %3, ptr %15, align 8
  %16 = getelementptr inbounds { ptr, i64 }, ptr %8, i32 0, i32 1
  store i64 %4, ptr %16, align 8
  store i1 false, ptr %9, align 1
  call void @_ZNSt6vectorINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEESaIS5_EEC2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #4
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %10, ptr align 8 %8, i64 16, i1 false), !tbaa.struct !5
  %17 = getelementptr inbounds { ptr, i64 }, ptr %10, i32 0, i32 0
  %18 = load ptr, ptr %17, align 8
  %19 = getelementptr inbounds { ptr, i64 }, ptr %10, i32 0, i32 1
  %20 = load i64, ptr %19, align 8
  invoke void @_ZNK3cub10StringView5splitES0_RSt6vectorINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEESaIS7_EE(ptr noundef nonnull align 8 dereferenceable(16) %7, ptr %18, i64 %20, ptr noundef nonnull align 8 dereferenceable(24) %0)
          to label %21 unwind label %23

21:                                               ; preds = %5
  store i1 true, ptr %9, align 1
  %22 = load i1, ptr %9, align 1
  br i1 %22, label %28, label %27

23:                                               ; preds = %5
  %24 = landingpad { ptr, i32 }
          cleanup
  %25 = extractvalue { ptr, i32 } %24, 0
  store ptr %25, ptr %11, align 8
  %26 = extractvalue { ptr, i32 } %24, 1
  store i32 %26, ptr %12, align 4
  call void @_ZNSt6vectorINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEESaIS5_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #4
  br label %29

27:                                               ; preds = %21
  call void @_ZNSt6vectorINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEESaIS5_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #4
  br label %28

28:                                               ; preds = %27, %21
  ret void

29:                                               ; preds = %23
  %30 = load ptr, ptr %11, align 8
  %31 = load i32, ptr %12, align 4
  %32 = insertvalue { ptr, i32 } poison, ptr %30, 0
  %33 = insertvalue { ptr, i32 } %32, i32 %31, 1
  resume { ptr, i32 } %33
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEESaIS5_EEC2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #2 align 2

declare void @_ZNK3cub10StringView5splitES0_RSt6vectorINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEESaIS7_EE(ptr noundef nonnull align 8 dereferenceable(16), ptr, i64, ptr noundef nonnull align 8 dereferenceable(24)) #3

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEESaIS5_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #2 align 2

attributes #0 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
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 = { "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 = { 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 = !{i64 0, i64 8, !6, i64 8, i64 8, !10}
!6 = !{!7, !7, i64 0}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!11, !11, i64 0}
!11 = !{!"long", !8, i64 0}


; 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::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<std::__cxx11::basic_string<char>, std::allocator<std::__cxx11::basic_string<char>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::__cxx11::basic_string<char>, std::allocator<std::__cxx11::basic_string<char>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::__cxx11::basic_string<char>, std::allocator<std::__cxx11::basic_string<char>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::__cxx11::basic_string<char>, std::allocator<std::__cxx11::basic_string<char>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"struct.cub::StringView" = type { ptr, i64 }

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN3cub8strutils5splitB5cxx11ENS_10StringViewES1_(ptr dead_on_unwind noalias nonnull writable sret(%"class.std::vector") align 8 %0, ptr %1, i64 %2, ptr %3, i64 %4) local_unnamed_addr #0 personality ptr @__gxx_personality_v0 {
  %6 = alloca %"struct.cub::StringView", align 8
  store ptr %1, ptr %6, align 8
  %7 = getelementptr inbounds i8, ptr %6, i64 8
  store i64 %2, ptr %7, align 8
  tail call void @_ZNSt6vectorINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEESaIS5_EEC2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #3
  invoke void @_ZNK3cub10StringView5splitES0_RSt6vectorINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEESaIS7_EE(ptr noundef nonnull align 8 dereferenceable(16) %6, ptr %3, i64 %4, ptr noundef nonnull align 8 dereferenceable(24) %0)
          to label %10 unwind label %8

8:                                                ; preds = %5
  %9 = landingpad { ptr, i32 }
          cleanup
  call void @_ZNSt6vectorINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEESaIS5_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #3
  resume { ptr, i32 } %9

10:                                               ; preds = %5
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEESaIS5_EEC2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #1 align 2

declare void @_ZNK3cub10StringView5splitES0_RSt6vectorINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEESaIS7_EE(ptr noundef nonnull align 8 dereferenceable(16), ptr, i64, ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEESaIS5_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #1 align 2

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 = { 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 #2 = { "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 = { 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: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass