; LLVM IR from seppo0010/rlite :: src (page_btree)

; 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.rl_btree = type { ptr, i64, i64, ptr, i64, i64 }
%struct.rl_btree_type = type { ptr, ptr, i32, i32, ptr }

; 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

declare i32 @rl_read(ptr noundef, ptr noundef, i64 noundef, ptr noundef, ptr noundef, i32 noundef) #1

; Function Attrs: nounwind uwtable
define dso_local i32 @rl_flatten_btree(ptr noundef %0, ptr noundef %1, ptr noundef %2, ptr noundef %3) #2 {
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca ptr, align 8
  %10 = alloca ptr, align 8
  %11 = alloca i32, align 4
  %12 = alloca i32, align 4
  store ptr %0, ptr %6, align 8, !tbaa !5
  store ptr %1, ptr %7, align 8, !tbaa !5
  store ptr %2, ptr %8, align 8, !tbaa !5
  store ptr %3, ptr %9, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #3
  %13 = load ptr, ptr %6, align 8, !tbaa !5
  %14 = load ptr, ptr %7, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct.rl_btree, ptr %14, i32 0, i32 3
  %16 = load ptr, ptr %15, align 8, !tbaa !9
  %17 = getelementptr inbounds %struct.rl_btree_type, ptr %16, i32 0, i32 1
  %18 = load ptr, ptr %17, align 8, !tbaa !12
  %19 = load ptr, ptr %7, align 8, !tbaa !5
  %20 = getelementptr inbounds %struct.rl_btree, ptr %19, i32 0, i32 4
  %21 = load i64, ptr %20, align 8, !tbaa !15
  %22 = load ptr, ptr %7, align 8, !tbaa !5
  %23 = call i32 @rl_read(ptr noundef %13, ptr noundef %18, i64 noundef %21, ptr noundef %22, ptr noundef %10, i32 noundef 1)
  store i32 %23, ptr %11, align 4, !tbaa !16
  %24 = load i32, ptr %11, align 4, !tbaa !16
  %25 = icmp ne i32 %24, 2
  br i1 %25, label %26, label %28

26:                                               ; preds = %4
  %27 = load i32, ptr %11, align 4, !tbaa !16
  store i32 %27, ptr %5, align 4
  store i32 1, ptr %12, align 4
  br label %35

28:                                               ; preds = %4
  %29 = load ptr, ptr %6, align 8, !tbaa !5
  %30 = load ptr, ptr %7, align 8, !tbaa !5
  %31 = load ptr, ptr %10, align 8, !tbaa !5
  %32 = load ptr, ptr %8, align 8, !tbaa !5
  %33 = load ptr, ptr %9, align 8, !tbaa !5
  %34 = call i32 @rl_flatten_btree_node(ptr noundef %29, ptr noundef %30, ptr noundef %31, ptr noundef %32, ptr noundef %33)
  store i32 %34, ptr %5, align 4
  store i32 1, ptr %12, align 4
  br label %35

35:                                               ; preds = %28, %26
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #3
  %36 = load i32, ptr %5, align 4
  ret i32 %36
}

; Function Attrs: nounwind uwtable
declare dso_local i32 @rl_flatten_btree_node(ptr noundef, ptr noundef, ptr noundef, ptr noundef, ptr noundef) #2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { "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 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, !6, i64 24}
!10 = !{!"rl_btree", !6, i64 0, !11, i64 8, !11, i64 16, !6, i64 24, !11, i64 32, !11, i64 40}
!11 = !{!"long", !7, i64 0}
!12 = !{!13, !6, i64 8}
!13 = !{!"", !6, i64 0, !6, i64 8, !14, i64 16, !14, i64 20, !6, i64 24}
!14 = !{!"int", !7, i64 0}
!15 = !{!10, !11, i64 32}
!16 = !{!14, !14, 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 nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

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

declare i32 @rl_read(ptr noundef, ptr noundef, i64 noundef, ptr noundef, ptr noundef, i32 noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local i32 @rl_flatten_btree(ptr noundef %0, ptr noundef %1, ptr noundef %2, ptr noundef %3) local_unnamed_addr #2 {
  %5 = alloca ptr, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %5) #3
  %6 = getelementptr inbounds i8, ptr %1, i64 24
  %7 = load ptr, ptr %6, align 8, !tbaa !5
  %8 = getelementptr inbounds i8, ptr %7, i64 8
  %9 = load ptr, ptr %8, align 8, !tbaa !11
  %10 = getelementptr inbounds i8, ptr %1, i64 32
  %11 = load i64, ptr %10, align 8, !tbaa !14
  %12 = call i32 @rl_read(ptr noundef %0, ptr noundef %9, i64 noundef %11, ptr noundef %1, ptr noundef nonnull %5, i32 noundef 1) #3
  %.not = icmp eq i32 %12, 2
  br i1 %.not, label %13, label %16

13:                                               ; preds = %4
  %14 = load ptr, ptr %5, align 8, !tbaa !15
  %15 = call i32 @rl_flatten_btree_node(ptr noundef %0, ptr noundef nonnull %1, ptr noundef %14, ptr noundef %2, ptr noundef %3)
  br label %16

16:                                               ; preds = %4, %13
  %.0 = phi i32 [ %15, %13 ], [ %12, %4 ]
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %5) #3
  ret i32 %.0
}

; Function Attrs: nounwind uwtable
declare dso_local i32 @rl_flatten_btree_node(ptr noundef, ptr noundef, ptr noundef, ptr noundef, ptr noundef) local_unnamed_addr #2

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { "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 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, !7, i64 24}
!6 = !{!"rl_btree", !7, i64 0, !10, i64 8, !10, i64 16, !7, i64 24, !10, i64 32, !10, i64 40}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"long", !8, i64 0}
!11 = !{!12, !7, i64 8}
!12 = !{!"", !7, i64 0, !7, i64 8, !13, i64 16, !13, i64 20, !7, i64 24}
!13 = !{!"int", !8, i64 0}
!14 = !{!6, !10, i64 32}
!15 = !{!7, !7, i64 0}


; Effective O3 passes: CorrelatedValuePropagationPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,SROAPass,SimplifyCFGPass