; LLVM IR from haoming-Yu/MINISQL :: src/page/b_plus_tree_page.ll (ZNK13BPlusTreePage10GetMinSizeEv)

; 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"

%class.BPlusTreePage = type { i32, i32, i32, i32, i32, i32 }

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_ZNK13BPlusTreePage10GetMaxSizeEv(ptr noundef nonnull align 4 dereferenceable(24)) #0 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_ZNK13BPlusTreePage10GetMinSizeEv(ptr noundef nonnull align 4 dereferenceable(24) %0) #0 align 2 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  %4 = load ptr, ptr %2, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  store i32 0, ptr %3, align 4, !tbaa !9
  %5 = getelementptr inbounds %class.BPlusTreePage, ptr %4, i32 0, i32 0
  %6 = load i32, ptr %5, align 4, !tbaa !11
  %7 = icmp eq i32 %6, 2
  br i1 %7, label %8, label %11

8:                                                ; preds = %1
  %9 = call noundef i32 @_ZNK13BPlusTreePage10GetMaxSizeEv(ptr noundef nonnull align 4 dereferenceable(24) %4)
  %10 = sdiv i32 %9, 2
  store i32 %10, ptr %3, align 4, !tbaa !9
  br label %19

11:                                               ; preds = %1
  %12 = getelementptr inbounds %class.BPlusTreePage, ptr %4, i32 0, i32 0
  %13 = load i32, ptr %12, align 4, !tbaa !11
  %14 = icmp eq i32 %13, 1
  br i1 %14, label %15, label %18

15:                                               ; preds = %11
  %16 = call noundef i32 @_ZNK13BPlusTreePage10GetMaxSizeEv(ptr noundef nonnull align 4 dereferenceable(24) %4)
  %17 = sdiv i32 %16, 2
  store i32 %17, ptr %3, align 4, !tbaa !9
  br label %18

18:                                               ; preds = %15, %11
  br label %19

19:                                               ; preds = %18, %8
  %20 = load i32, ptr %3, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  ret i32 %20
}

; 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

attributes #0 = { 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !13, i64 0}
!12 = !{!"_ZTS13BPlusTreePage", !13, i64 0, !10, i64 4, !10, i64 8, !10, i64 12, !10, i64 16, !10, i64 20}
!13 = !{!"_ZTS13IndexPageType", !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 nounwind uwtable
declare dso_local noundef i32 @_ZNK13BPlusTreePage10GetMaxSizeEv(ptr noundef nonnull align 4 dereferenceable(24)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef range(i32 -1073741824, 1073741824) i32 @_ZNK13BPlusTreePage10GetMinSizeEv(ptr noundef nonnull align 4 dereferenceable(24) %0) local_unnamed_addr #0 align 2 {
  %2 = load i32, ptr %0, align 4, !tbaa !5
  %.off = add i32 %2, -1
  %switch = icmp ult i32 %.off, 2
  br i1 %switch, label %.sink.split, label %5

.sink.split:                                      ; preds = %1
  %3 = tail call noundef i32 @_ZNK13BPlusTreePage10GetMaxSizeEv(ptr noundef nonnull align 4 dereferenceable(24) %0)
  %4 = sdiv i32 %3, 2
  br label %5

5:                                                ; preds = %1, %.sink.split
  %.0 = phi i32 [ 0, %1 ], [ %4, %.sink.split ]
  ret i32 %.0
}

attributes #0 = { 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" }

!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 0}
!6 = !{!"_ZTS13BPlusTreePage", !7, i64 0, !10, i64 4, !10, i64 8, !10, i64 12, !10, i64 16, !10, i64 20}
!7 = !{!"_ZTS13IndexPageType", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"int", !8, i64 0}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass