; LLVM IR from cruppstahl/upscaledb :: src/4db/db.ll (ZN9upscaledb2Db13remove_cursorEPNS_6CursorE)

; 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.upscaledb::Cursor" = type { ptr, ptr, ptr, ptr, ptr }
%"struct.upscaledb::Db" = type { ptr, ptr, ptr, ptr, %"struct.upscaledb::DbConfig", %"struct.upscaledb::DynamicArray", %"struct.upscaledb::DynamicArray" }
%"struct.upscaledb::DbConfig" = type { i16, i32, i32, i64, i32, i64, i32, i32, %"class.std::__cxx11::basic_string" }
%"class.std::__cxx11::basic_string" = type { %"struct.std::__cxx11::basic_string<char>::_Alloc_hider", i64, %union.anon }
%"struct.std::__cxx11::basic_string<char>::_Alloc_hider" = type { ptr }
%union.anon = type { i64, [8 x i8] }
%"struct.upscaledb::DynamicArray" = type <{ ptr, i64, i8, [7 x i8] }>

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN9upscaledb2Db13remove_cursorEPNS_6CursorE(ptr noundef nonnull align 8 dereferenceable(160) %0, ptr noundef %1) #1 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  %7 = load ptr, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  %8 = load ptr, ptr %4, align 8, !tbaa !5
  %9 = getelementptr inbounds %"struct.upscaledb::Cursor", ptr %8, i32 0, i32 4
  %10 = load ptr, ptr %9, align 8, !tbaa !9
  store ptr %10, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  %11 = load ptr, ptr %4, align 8, !tbaa !5
  %12 = getelementptr inbounds %"struct.upscaledb::Cursor", ptr %11, i32 0, i32 3
  %13 = load ptr, ptr %12, align 8, !tbaa !11
  store ptr %13, ptr %6, align 8, !tbaa !5
  %14 = load ptr, ptr %5, align 8, !tbaa !5
  %15 = icmp ne ptr %14, null
  br i1 %15, label %16, label %20

16:                                               ; preds = %2
  %17 = load ptr, ptr %6, align 8, !tbaa !5
  %18 = load ptr, ptr %5, align 8, !tbaa !5
  %19 = getelementptr inbounds %"struct.upscaledb::Cursor", ptr %18, i32 0, i32 3
  store ptr %17, ptr %19, align 8, !tbaa !11
  br label %23

20:                                               ; preds = %2
  %21 = load ptr, ptr %6, align 8, !tbaa !5
  %22 = getelementptr inbounds %"struct.upscaledb::Db", ptr %7, i32 0, i32 3
  store ptr %21, ptr %22, align 8, !tbaa !12
  br label %23

23:                                               ; preds = %20, %16
  %24 = load ptr, ptr %6, align 8, !tbaa !5
  %25 = icmp ne ptr %24, null
  br i1 %25, label %26, label %30

26:                                               ; preds = %23
  %27 = load ptr, ptr %5, align 8, !tbaa !5
  %28 = load ptr, ptr %6, align 8, !tbaa !5
  %29 = getelementptr inbounds %"struct.upscaledb::Cursor", ptr %28, i32 0, i32 4
  store ptr %27, ptr %29, align 8, !tbaa !9
  br label %30

30:                                               ; preds = %26, %23
  %31 = load ptr, ptr %4, align 8, !tbaa !5
  %32 = getelementptr inbounds %"struct.upscaledb::Cursor", ptr %31, i32 0, i32 3
  store ptr null, ptr %32, align 8, !tbaa !11
  %33 = load ptr, ptr %4, align 8, !tbaa !5
  %34 = getelementptr inbounds %"struct.upscaledb::Cursor", ptr %33, i32 0, i32 4
  store ptr null, ptr %34, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { 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, !6, i64 32}
!10 = !{!"_ZTSN9upscaledb6CursorE", !6, i64 8, !6, i64 16, !6, i64 24, !6, i64 32}
!11 = !{!10, !6, i64 24}
!12 = !{!13, !6, i64 24}
!13 = !{!"_ZTSN9upscaledb2DbE", !6, i64 8, !6, i64 16, !6, i64 24, !14, i64 32, !20, i64 112, !20, i64 136}
!14 = !{!"_ZTSN9upscaledb8DbConfigE", !15, i64 0, !16, i64 4, !16, i64 8, !17, i64 16, !16, i64 24, !17, i64 32, !16, i64 40, !16, i64 44, !18, i64 48}
!15 = !{!"short", !7, i64 0}
!16 = !{!"int", !7, i64 0}
!17 = !{!"long", !7, i64 0}
!18 = !{!"_ZTSNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE", !19, i64 0, !17, i64 8, !7, i64 16}
!19 = !{!"_ZTSNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE12_Alloc_hiderE", !6, i64 0}
!20 = !{!"_ZTSN9upscaledb12DynamicArrayIhEE", !6, i64 0, !17, i64 8, !21, i64 16}
!21 = !{!"bool", !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 nofree norecurse nosync nounwind willreturn memory(write, argmem: readwrite, inaccessiblemem: none) uwtable
define dso_local void @_ZN9upscaledb2Db13remove_cursorEPNS_6CursorE(ptr nocapture noundef nonnull writeonly align 8 dereferenceable(160) %0, ptr nocapture noundef %1) local_unnamed_addr #0 align 2 {
  %3 = getelementptr inbounds i8, ptr %1, i64 32
  %4 = load ptr, ptr %3, align 8, !tbaa !5
  %5 = getelementptr inbounds i8, ptr %1, i64 24
  %6 = load ptr, ptr %5, align 8, !tbaa !10
  %.not = icmp eq ptr %4, null
  %. = select i1 %.not, ptr %0, ptr %4
  %7 = getelementptr inbounds i8, ptr %., i64 24
  store ptr %6, ptr %7, align 8, !tbaa !11
  %.not13 = icmp eq ptr %6, null
  br i1 %.not13, label %10, label %8

8:                                                ; preds = %2
  %9 = getelementptr inbounds i8, ptr %6, i64 32
  store ptr %4, ptr %9, align 8, !tbaa !5
  br label %10

10:                                               ; preds = %8, %2
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(16) %5, i8 0, i64 16, i1 false)
  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

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(write, argmem: readwrite, inaccessiblemem: none) 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) }

!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, !7, i64 32}
!6 = !{!"_ZTSN9upscaledb6CursorE", !7, i64 8, !7, i64 16, !7, i64 24, !7, i64 32}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!6, !7, i64 24}
!11 = !{!7, !7, i64 0}


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