; LLVM IR from artagnon/phoenixfs :: btree (get_neighbor_index)

; 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.node = type { ptr, ptr, ptr, i8, i16, ptr }

@.str.37 = external hidden unnamed_addr constant [51 x i8], align 1
@.str.38 = external hidden unnamed_addr constant [13 x i8], align 1

declare i32 @printf(ptr noundef, ...) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: noreturn nounwind
declare void @exit(i32 noundef) #2

; Function Attrs: nounwind uwtable
define dso_local i32 @get_neighbor_index(ptr noundef %0) #3 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #4
  store i32 0, ptr %3, align 4, !tbaa !9
  br label %4

4:                                                ; preds = %29, %1
  %5 = load i32, ptr %3, align 4, !tbaa !9
  %6 = load ptr, ptr %2, align 8, !tbaa !5
  %7 = getelementptr inbounds %struct.node, ptr %6, i32 0, i32 2
  %8 = load ptr, ptr %7, align 8, !tbaa !11
  %9 = getelementptr inbounds %struct.node, ptr %8, i32 0, i32 4
  %10 = load i16, ptr %9, align 2, !tbaa !15
  %11 = zext i16 %10 to i32
  %12 = icmp sle i32 %5, %11
  br i1 %12, label %13, label %32

13:                                               ; preds = %4
  %14 = load ptr, ptr %2, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct.node, ptr %14, i32 0, i32 2
  %16 = load ptr, ptr %15, align 8, !tbaa !11
  %17 = getelementptr inbounds %struct.node, ptr %16, i32 0, i32 0
  %18 = load ptr, ptr %17, align 8, !tbaa !16
  %19 = load i32, ptr %3, align 4, !tbaa !9
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds ptr, ptr %18, i64 %20
  %22 = load ptr, ptr %21, align 8, !tbaa !5
  %23 = load ptr, ptr %2, align 8, !tbaa !5
  %24 = icmp eq ptr %22, %23
  br i1 %24, label %25, label %28

25:                                               ; preds = %13
  %26 = load i32, ptr %3, align 4, !tbaa !9
  %27 = sub nsw i32 %26, 1
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #4
  ret i32 %27

28:                                               ; preds = %13
  br label %29

29:                                               ; preds = %28
  %30 = load i32, ptr %3, align 4, !tbaa !9
  %31 = add nsw i32 %30, 1
  store i32 %31, ptr %3, align 4, !tbaa !9
  br label %4, !llvm.loop !17

32:                                               ; preds = %4
  %33 = call i32 (ptr, ...) @printf(ptr noundef @.str.37)
  %34 = load ptr, ptr %2, align 8, !tbaa !5
  %35 = ptrtoint ptr %34 to i64
  %36 = call i32 (ptr, ...) @printf(ptr noundef @.str.38, i64 noundef %35)
  call void @exit(i32 noundef 1) #5
  unreachable
}

attributes #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 nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { noreturn nounwind "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 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 #4 = { nounwind }
attributes #5 = { noreturn 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, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !6, i64 16}
!12 = !{!"node", !6, i64 0, !6, i64 8, !6, i64 16, !13, i64 24, !14, i64 26, !6, i64 32}
!13 = !{!"_Bool", !7, i64 0}
!14 = !{!"short", !7, i64 0}
!15 = !{!12, !14, i64 26}
!16 = !{!12, !6, i64 0}
!17 = distinct !{!17, !18}
!18 = !{!"llvm.loop.mustprogress"}


; 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"

@.str.37 = external hidden unnamed_addr constant [51 x i8], align 1
@.str.38 = external hidden unnamed_addr constant [13 x i8], align 1

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #0

; Function Attrs: noreturn nounwind
declare void @exit(i32 noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local range(i32 -2147483648, 65535) i32 @get_neighbor_index(ptr noundef %0) local_unnamed_addr #2 {
  %2 = getelementptr inbounds i8, ptr %0, i64 16
  %3 = load ptr, ptr %2, align 8, !tbaa !5
  %4 = getelementptr inbounds i8, ptr %3, i64 26
  %5 = load i16, ptr %4, align 2, !tbaa !12
  %6 = zext i16 %5 to i64
  %7 = load ptr, ptr %3, align 8, !tbaa !13
  br label %8

8:                                                ; preds = %1, %15
  %indvars.iv = phi i64 [ 0, %1 ], [ %indvars.iv.next, %15 ]
  %9 = getelementptr inbounds ptr, ptr %7, i64 %indvars.iv
  %10 = load ptr, ptr %9, align 8, !tbaa !14
  %11 = icmp eq ptr %10, %0
  br i1 %11, label %12, label %15

12:                                               ; preds = %8
  %13 = trunc nuw nsw i64 %indvars.iv to i32
  %14 = add nsw i32 %13, -1
  ret i32 %14

15:                                               ; preds = %8
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv, %6
  br i1 %exitcond.not, label %16, label %8, !llvm.loop !15

16:                                               ; preds = %15
  %17 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.37)
  %18 = ptrtoint ptr %0 to i64
  %19 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.38, i64 noundef %18)
  tail call void @exit(i32 noundef 1) #3
  unreachable
}

attributes #0 = { nofree nounwind "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 = { noreturn nounwind "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 = { noreturn 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 16}
!6 = !{!"node", !7, i64 0, !7, i64 8, !7, i64 16, !10, i64 24, !11, i64 26, !7, i64 32}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"_Bool", !8, i64 0}
!11 = !{!"short", !8, i64 0}
!12 = !{!6, !11, i64 26}
!13 = !{!6, !7, i64 0}
!14 = !{!7, !7, i64 0}
!15 = distinct !{!15, !16}
!16 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LICMPass,LoopRotatePass,LoopUnrollPass,SCCPPass,SROAPass,SimplifyCFGPass,TailCallElimPass