; LLVM IR from eXascaleInfolab/daoc :: export/shared/fileio.ll (ZN4daoc12StringBuffer5resetEm)

; 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.daoc::StringBuffer" = type { %"class.std::vector", i64, i64 }
%"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
declare dso_local noundef ptr @_ZNSt6vectorIcSaIcEE4dataEv(ptr noundef nonnull align 8 dereferenceable(24)) #0 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN4daoc12StringBuffer5resetEm(ptr noundef nonnull align 8 dereferenceable(40) %0, i64 noundef %1) #1 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca i64, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i64 %1, ptr %4, align 8, !tbaa !9
  %5 = load ptr, ptr %3, align 8
  %6 = getelementptr inbounds %"class.daoc::StringBuffer", ptr %5, i32 0, i32 1
  store i64 0, ptr %6, align 8, !tbaa !11
  %7 = getelementptr inbounds %"class.daoc::StringBuffer", ptr %5, i32 0, i32 2
  store i64 0, ptr %7, align 8, !tbaa !17
  %8 = load i64, ptr %4, align 8, !tbaa !9
  call void @_ZNSt6vectorIcSaIcEE6resizeEm(ptr noundef nonnull align 8 dereferenceable(24) %5, i64 noundef %8)
  call void @_ZNSt6vectorIcSaIcEE13shrink_to_fitEv(ptr noundef nonnull align 8 dereferenceable(24) %5)
  %9 = call noundef ptr @_ZNSt6vectorIcSaIcEE4dataEv(ptr noundef nonnull align 8 dereferenceable(24) %5) #2
  store i8 0, ptr %9, align 1, !tbaa !18
  %10 = call noundef ptr @_ZNSt6vectorIcSaIcEE4dataEv(ptr noundef nonnull align 8 dereferenceable(24) %5) #2
  %11 = load i64, ptr %4, align 8, !tbaa !9
  %12 = sub i64 %11, 2
  %13 = getelementptr inbounds i8, ptr %10, i64 %12
  store i8 0, ptr %13, align 1, !tbaa !18
  ret void
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIcSaIcEE6resizeEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIcSaIcEE13shrink_to_fitEv(ptr noundef nonnull align 8 dereferenceable(24)) #1 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 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 = { 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 = !{!"long", !7, i64 0}
!11 = !{!12, !10, i64 24}
!12 = !{!"_ZTSN4daoc12StringBufferE", !13, i64 0, !10, i64 24, !10, i64 32}
!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 = !{!12, !10, i64 32}
!18 = !{!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
declare dso_local noundef ptr @_ZNSt6vectorIcSaIcEE4dataEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN4daoc12StringBuffer5resetEm(ptr noundef nonnull align 8 dereferenceable(40) %0, i64 noundef %1) local_unnamed_addr #1 align 2 {
  %3 = getelementptr inbounds i8, ptr %0, i64 24
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(16) %3, i8 0, i64 16, i1 false)
  tail call void @_ZNSt6vectorIcSaIcEE6resizeEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %1)
  tail call void @_ZNSt6vectorIcSaIcEE13shrink_to_fitEv(ptr noundef nonnull align 8 dereferenceable(24) %0)
  %4 = tail call noundef ptr @_ZNSt6vectorIcSaIcEE4dataEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #3
  store i8 0, ptr %4, align 1, !tbaa !5
  %5 = tail call noundef ptr @_ZNSt6vectorIcSaIcEE4dataEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #3
  %6 = getelementptr i8, ptr %5, i64 %1
  %7 = getelementptr i8, ptr %6, i64 -2
  store i8 0, ptr %7, align 1, !tbaa !5
  ret void
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIcSaIcEE6resizeEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIcSaIcEE13shrink_to_fitEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #1 align 2

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #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 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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}


; Effective O3 passes: GlobalOptPass,InstCombinePass,MemCpyOptPass,SROAPass,TailCallElimPass