; LLVM IR from erthink/libmdbx :: src (api-cursor)

; 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.MDBX_cursor = type { i32, %union.anon, i8, i8, ptr, ptr, ptr, ptr, ptr, [32 x ptr], [32 x i16], ptr, ptr }
%union.anon = type { i16 }
%struct.cursor_couple = type { %struct.MDBX_cursor, ptr, %struct.inner_cursor }
%struct.inner_cursor = type { %struct.MDBX_cursor, %struct.tree }
%struct.tree = type { i16, i16, i32, i32, i32, i32, i32, i64, i64, i64 }

; 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(none)
declare i64 @llvm.expect.i64(i64, i64) #1

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

; Function Attrs: nounwind willreturn memory(read) uwtable
define dso_local ptr @mdbx_cursor_get_userctx(ptr noundef %0) #2 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  %5 = load ptr, ptr %3, align 8, !tbaa !5
  %6 = icmp ne ptr %5, null
  %7 = xor i1 %6, true
  %8 = xor i1 %7, true
  %9 = xor i1 %8, true
  %10 = zext i1 %9 to i32
  %11 = sext i32 %10 to i64
  %12 = call i64 @llvm.expect.i64(i64 %11, i64 0)
  %13 = icmp ne i64 %12, 0
  br i1 %13, label %14, label %15

14:                                               ; preds = %1
  store ptr null, ptr %2, align 8
  br label %40

15:                                               ; preds = %1
  %16 = load ptr, ptr %3, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.MDBX_cursor, ptr %16, i32 0, i32 0
  %18 = load i32, ptr %17, align 8, !tbaa !9
  %19 = icmp ne i32 %18, 672636999
  br i1 %19, label %20, label %25

20:                                               ; preds = %15
  %21 = load ptr, ptr %3, align 8, !tbaa !5
  %22 = getelementptr inbounds %struct.MDBX_cursor, ptr %21, i32 0, i32 0
  %23 = load i32, ptr %22, align 8, !tbaa !9
  %24 = icmp ne i32 %23, 2114311601
  br label %25

25:                                               ; preds = %20, %15
  %26 = phi i1 [ false, %15 ], [ %24, %20 ]
  %27 = xor i1 %26, true
  %28 = xor i1 %27, true
  %29 = zext i1 %28 to i32
  %30 = sext i32 %29 to i64
  %31 = call i64 @llvm.expect.i64(i64 %30, i64 0)
  %32 = icmp ne i64 %31, 0
  br i1 %32, label %33, label %34

33:                                               ; preds = %25
  store ptr null, ptr %2, align 8
  br label %40

34:                                               ; preds = %25
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %35 = load ptr, ptr %3, align 8, !tbaa !5
  %36 = getelementptr inbounds i8, ptr %35, i64 0
  store ptr %36, ptr %4, align 8, !tbaa !5
  %37 = load ptr, ptr %4, align 8, !tbaa !5
  %38 = getelementptr inbounds %struct.cursor_couple, ptr %37, i32 0, i32 1
  %39 = load ptr, ptr %38, align 8, !tbaa !12
  store ptr %39, ptr %2, align 8
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  br label %40

40:                                               ; preds = %34, %33, %14
  %41 = load ptr, ptr %2, align 8
  ret ptr %41
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(none) }
attributes #2 = { nounwind willreturn memory(read) 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 = { 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/C++ TBAA"}
!9 = !{!10, !11, i64 0}
!10 = !{!"MDBX_cursor", !11, i64 0, !7, i64 4, !7, i64 6, !7, i64 7, !6, i64 8, !6, i64 16, !6, i64 24, !6, i64 32, !6, i64 40, !7, i64 48, !7, i64 304, !6, i64 368, !6, i64 376}
!11 = !{!"int", !7, i64 0}
!12 = !{!13, !6, i64 384}
!13 = !{!"cursor_couple", !10, i64 0, !6, i64 384, !14, i64 392}
!14 = !{!"inner_cursor", !10, i64 0, !15, i64 384}
!15 = !{!"tree", !16, i64 0, !16, i64 2, !11, i64 4, !11, i64 8, !11, i64 12, !11, i64 16, !11, i64 20, !17, i64 24, !17, i64 32, !17, i64 40}
!16 = !{!"short", !7, i64 0}
!17 = !{!"long", !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(argmem: read) uwtable
define dso_local ptr @mdbx_cursor_get_userctx(ptr noundef readonly %0) local_unnamed_addr #0 {
  %.not = icmp eq ptr %0, null
  br i1 %.not, label %7, label %2, !prof !5

2:                                                ; preds = %1
  %3 = load i32, ptr %0, align 8, !tbaa !6
  switch i32 %3, label %7 [
    i32 2114311601, label %4
    i32 672636999, label %4
  ]

4:                                                ; preds = %2, %2
  %5 = getelementptr inbounds i8, ptr %0, i64 384
  %6 = load ptr, ptr %5, align 8, !tbaa !12
  br label %7

7:                                                ; preds = %2, %1, %4
  %.0 = phi ptr [ %6, %4 ], [ null, %1 ], [ null, %2 ]
  ret ptr %.0
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) 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" }

!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 = !{!"branch_weights", !"expected", i32 1, i32 2000}
!6 = !{!7, !8, i64 0}
!7 = !{!"MDBX_cursor", !8, i64 0, !9, i64 4, !9, i64 6, !9, i64 7, !11, i64 8, !11, i64 16, !11, i64 24, !11, i64 32, !11, i64 40, !9, i64 48, !9, i64 304, !11, i64 368, !11, i64 376}
!8 = !{!"int", !9, i64 0}
!9 = !{!"omnipotent char", !10, i64 0}
!10 = !{!"Simple C/C++ TBAA"}
!11 = !{!"any pointer", !9, i64 0}
!12 = !{!13, !11, i64 384}
!13 = !{!"cursor_couple", !7, i64 0, !11, i64 384, !14, i64 392}
!14 = !{!"inner_cursor", !7, i64 0, !15, i64 384}
!15 = !{!"tree", !16, i64 0, !16, i64 2, !8, i64 4, !8, i64 8, !8, i64 12, !8, i64 16, !8, i64 20, !17, i64 24, !17, i64 32, !17, i64 40}
!16 = !{!"short", !9, i64 0}
!17 = !{!"long", !9, i64 0}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,LowerExpectIntrinsicPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass