; 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
declare dso_local i32 @rl_btree_node_pages(ptr noundef, ptr noundef, ptr noundef, ptr noundef) #2

; Function Attrs: nounwind uwtable
define dso_local i32 @rl_btree_pages(ptr noundef %0, ptr noundef %1, ptr noundef %2) #2 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  store ptr %2, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %10 = load ptr, ptr %6, align 8, !tbaa !5
  %11 = load ptr, ptr %5, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.rl_btree, ptr %11, i32 0, i32 4
  %13 = load i64, ptr %12, align 8, !tbaa !9
  %14 = getelementptr inbounds i16, ptr %10, i64 %13
  store i16 1, ptr %14, align 2, !tbaa !12
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  %15 = load ptr, ptr %4, align 8, !tbaa !5
  %16 = load ptr, ptr %5, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.rl_btree, ptr %16, i32 0, i32 3
  %18 = load ptr, ptr %17, align 8, !tbaa !14
  %19 = getelementptr inbounds %struct.rl_btree_type, ptr %18, i32 0, i32 1
  %20 = load ptr, ptr %19, align 8, !tbaa !15
  %21 = load ptr, ptr %5, align 8, !tbaa !5
  %22 = getelementptr inbounds %struct.rl_btree, ptr %21, i32 0, i32 4
  %23 = load i64, ptr %22, align 8, !tbaa !9
  %24 = load ptr, ptr %5, align 8, !tbaa !5
  %25 = call i32 @rl_read(ptr noundef %15, ptr noundef %20, i64 noundef %23, ptr noundef %24, ptr noundef %7, i32 noundef 1)
  store i32 %25, ptr %9, align 4, !tbaa !18
  %26 = load i32, ptr %9, align 4, !tbaa !18
  %27 = icmp ne i32 2, %26
  br i1 %27, label %28, label %29

28:                                               ; preds = %3
  br label %40

29:                                               ; preds = %3
  %30 = load ptr, ptr %7, align 8, !tbaa !5
  store ptr %30, ptr %8, align 8, !tbaa !5
  %31 = load ptr, ptr %4, align 8, !tbaa !5
  %32 = load ptr, ptr %5, align 8, !tbaa !5
  %33 = load ptr, ptr %8, align 8, !tbaa !5
  %34 = load ptr, ptr %6, align 8, !tbaa !5
  %35 = call i32 @rl_btree_node_pages(ptr noundef %31, ptr noundef %32, ptr noundef %33, ptr noundef %34)
  store i32 %35, ptr %9, align 4, !tbaa !18
  %36 = load i32, ptr %9, align 4, !tbaa !18
  %37 = icmp ne i32 0, %36
  br i1 %37, label %38, label %39

38:                                               ; preds = %29
  br label %40

39:                                               ; preds = %29
  br label %40

40:                                               ; preds = %39, %38, %28
  %41 = load i32, ptr %9, align 4, !tbaa !18
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  ret i32 %41
}

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, !11, i64 32}
!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, !13, i64 0}
!13 = !{!"short", !7, i64 0}
!14 = !{!10, !6, i64 24}
!15 = !{!16, !6, i64 8}
!16 = !{!"", !6, i64 0, !6, i64 8, !17, i64 16, !17, i64 20, !6, i64 24}
!17 = !{!"int", !7, i64 0}
!18 = !{!17, !17, 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
declare dso_local i32 @rl_btree_node_pages(ptr noundef, ptr noundef, ptr noundef, ptr noundef) local_unnamed_addr #2

; Function Attrs: nounwind uwtable
define dso_local i32 @rl_btree_pages(ptr noundef %0, ptr noundef %1, ptr noundef %2) local_unnamed_addr #2 {
  %4 = alloca ptr, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #3
  %5 = getelementptr inbounds i8, ptr %1, i64 32
  %6 = load i64, ptr %5, align 8, !tbaa !5
  %7 = getelementptr inbounds i16, ptr %2, i64 %6
  store i16 1, ptr %7, align 2, !tbaa !11
  %8 = getelementptr inbounds i8, ptr %1, i64 24
  %9 = load ptr, ptr %8, align 8, !tbaa !13
  %10 = getelementptr inbounds i8, ptr %9, i64 8
  %11 = load ptr, ptr %10, align 8, !tbaa !14
  %12 = call i32 @rl_read(ptr noundef %0, ptr noundef %11, i64 noundef %6, ptr noundef %1, ptr noundef nonnull %4, i32 noundef 1) #3
  %.not = icmp eq i32 %12, 2
  br i1 %.not, label %13, label %16

13:                                               ; preds = %3
  %14 = load ptr, ptr %4, align 8, !tbaa !17
  %15 = call i32 @rl_btree_node_pages(ptr noundef %0, ptr noundef nonnull %1, ptr noundef %14, ptr noundef nonnull %2)
  br label %16

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

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, !10, i64 32}
!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, !12, i64 0}
!12 = !{!"short", !8, i64 0}
!13 = !{!6, !7, i64 24}
!14 = !{!15, !7, i64 8}
!15 = !{!"", !7, i64 0, !7, i64 8, !16, i64 16, !16, i64 20, !7, i64 24}
!16 = !{!"int", !8, i64 0}
!17 = !{!7, !7, i64 0}


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