; LLVM IR from AF-GRILL/DISPluginForUnreal :: Source/ThirdParty/include/utils/DataStream.ll (ZN3DIS10DataStreamC2ENS_6EndianE)

; 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.DIS::DataStream" = type { %"class.std::vector", i64, i64, i32, i32 }
%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<char, std::allocator<char>>::_Vector_impl" }
%"struct.std::_Vector_base<char, std::allocator<char>>::_Vector_impl" = type { %"struct.std::_Vector_base<char, std::allocator<char>>::_Vector_impl_data" }
%"struct.std::_Vector_base<char, std::allocator<char>>::_Vector_impl_data" = type { ptr, ptr, ptr }

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN3DIS10DataStreamC2ENS_6EndianE(ptr noundef nonnull align 8 dereferenceable(48) %0, i32 noundef %1) unnamed_addr #0 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i64, align 8
  %6 = alloca i8, align 1
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  %7 = load ptr, ptr %3, align 8
  %8 = getelementptr inbounds %"class.DIS::DataStream", ptr %7, i32 0, i32 0
  call void @llvm.memset.p0.i64(ptr align 8 %8, i8 0, i64 24, i1 false)
  call void @_ZNSt6vectorIcSaIcEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24) %8) #3
  %9 = getelementptr inbounds %"class.DIS::DataStream", ptr %7, i32 0, i32 1
  store i64 0, ptr %9, align 8, !tbaa !11
  %10 = getelementptr inbounds %"class.DIS::DataStream", ptr %7, i32 0, i32 2
  store i64 0, ptr %10, align 8, !tbaa !18
  %11 = getelementptr inbounds %"class.DIS::DataStream", ptr %7, i32 0, i32 3
  %12 = load i32, ptr %4, align 4, !tbaa !9
  store i32 %12, ptr %11, align 8, !tbaa !19
  %13 = getelementptr inbounds %"class.DIS::DataStream", ptr %7, i32 0, i32 4
  store i32 1, ptr %13, align 4, !tbaa !20
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  store i64 1, ptr %5, align 8, !tbaa !21
  call void @llvm.lifetime.start.p0(i64 1, ptr %6) #3
  %14 = getelementptr inbounds i8, ptr %5, i64 0
  %15 = load i8, ptr %14, align 8, !tbaa !22
  store i8 %15, ptr %6, align 1, !tbaa !22
  %16 = load i8, ptr %6, align 1, !tbaa !22
  %17 = sext i8 %16 to i32
  %18 = icmp eq i32 %17, 1
  br i1 %18, label %19, label %21

19:                                               ; preds = %2
  %20 = getelementptr inbounds %"class.DIS::DataStream", ptr %7, i32 0, i32 4
  store i32 1, ptr %20, align 4, !tbaa !20
  br label %23

21:                                               ; preds = %2
  %22 = getelementptr inbounds %"class.DIS::DataStream", ptr %7, i32 0, i32 4
  store i32 0, ptr %22, align 4, !tbaa !20
  br label %23

23:                                               ; preds = %21, %19
  call void @llvm.lifetime.end.p0(i64 1, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  ret void
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIcSaIcEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #0 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

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 nounwind willreturn memory(argmem: write) }
attributes #2 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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)"}
!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 = !{!"_ZTSN3DIS6EndianE", !7, i64 0}
!11 = !{!12, !17, i64 24}
!12 = !{!"_ZTSN3DIS10DataStreamE", !13, i64 0, !17, i64 24, !17, i64 32, !10, i64 40, !10, i64 44}
!13 = !{!"_ZTSSt6vectorIcSaIcEE", !14, i64 0}
!14 = !{!"_ZTSSt12_Vector_baseIcSaIcEE", !15, i64 0}
!15 = !{!"_ZTSNSt12_Vector_baseIcSaIcEE12_Vector_implE", !16, i64 0}
!16 = !{!"_ZTSNSt12_Vector_baseIcSaIcEE17_Vector_impl_dataE", !6, i64 0, !6, i64 8, !6, i64 16}
!17 = !{!"long", !7, i64 0}
!18 = !{!12, !17, i64 32}
!19 = !{!12, !10, i64 40}
!20 = !{!12, !10, i64 44}
!21 = !{!17, !17, i64 0}
!22 = !{!7, !7, 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"

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN3DIS10DataStreamC2ENS_6EndianE(ptr noundef nonnull align 8 dereferenceable(48) %0, i32 noundef %1) unnamed_addr #0 align 2 {
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(24) %0, i8 0, i64 24, i1 false)
  tail call void @_ZNSt6vectorIcSaIcEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #2
  %3 = getelementptr inbounds i8, ptr %0, i64 24
  %4 = getelementptr inbounds i8, ptr %0, i64 40
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(16) %3, i8 0, i64 16, i1 false)
  store i32 %1, ptr %4, align 8, !tbaa !5
  %5 = getelementptr inbounds i8, ptr %0, i64 44
  store i32 1, ptr %5, align 4, !tbaa !16
  ret void
}

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIcSaIcEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #0 align 2

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 nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #2 = { 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, !15, i64 40}
!6 = !{!"_ZTSN3DIS10DataStreamE", !7, i64 0, !14, i64 24, !14, i64 32, !15, i64 40, !15, i64 44}
!7 = !{!"_ZTSSt6vectorIcSaIcEE", !8, i64 0}
!8 = !{!"_ZTSSt12_Vector_baseIcSaIcEE", !9, i64 0}
!9 = !{!"_ZTSNSt12_Vector_baseIcSaIcEE12_Vector_implE", !10, i64 0}
!10 = !{!"_ZTSNSt12_Vector_baseIcSaIcEE17_Vector_impl_dataE", !11, i64 0, !11, i64 8, !11, i64 16}
!11 = !{!"any pointer", !12, i64 0}
!12 = !{!"omnipotent char", !13, i64 0}
!13 = !{!"Simple C++ TBAA"}
!14 = !{!"long", !12, i64 0}
!15 = !{!"_ZTSN3DIS6EndianE", !12, i64 0}
!16 = !{!6, !15, i64 44}


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