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

; 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"

; Function Attrs: cold nounwind optsize willreturn memory(read) uwtable
declare dso_local i64 @mdbx_default_pagesize() #0

; Function Attrs: inlinehint nounwind willreturn memory(none) uwtable
declare hidden zeroext i1 @is_powerof2(i64 noundef) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(none)
declare i64 @llvm.expect.i64(i64, i64) #2

; Function Attrs: cold nounwind optsize willreturn memory(none) uwtable
define dso_local i64 @mdbx_limits_pairsize4page_max(i64 noundef %0, i32 noundef %1) #3 {
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i32, align 4
  store i64 %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  %6 = load i64, ptr %4, align 8, !tbaa !5
  %7 = icmp slt i64 %6, 1
  br i1 %7, label %8, label %10

8:                                                ; preds = %2
  %9 = call i64 @mdbx_default_pagesize() #4
  store i64 %9, ptr %4, align 8, !tbaa !5
  br label %10

10:                                               ; preds = %8, %2
  %11 = load i64, ptr %4, align 8, !tbaa !5
  %12 = icmp slt i64 %11, 256
  br i1 %12, label %20, label %13

13:                                               ; preds = %10
  %14 = load i64, ptr %4, align 8, !tbaa !5
  %15 = icmp sgt i64 %14, 65536
  br i1 %15, label %20, label %16

16:                                               ; preds = %13
  %17 = load i64, ptr %4, align 8, !tbaa !5
  %18 = call zeroext i1 @is_powerof2(i64 noundef %17) #5
  %19 = xor i1 %18, true
  br label %20

20:                                               ; preds = %16, %13, %10
  %21 = phi i1 [ true, %13 ], [ true, %10 ], [ %19, %16 ]
  %22 = xor i1 %21, true
  %23 = xor i1 %22, true
  %24 = zext i1 %23 to i32
  %25 = sext i32 %24 to i64
  %26 = call i64 @llvm.expect.i64(i64 %25, i64 0)
  %27 = icmp ne i64 %26, 0
  br i1 %27, label %28, label %29

28:                                               ; preds = %20
  store i64 -1, ptr %3, align 8
  br label %49

29:                                               ; preds = %20
  %30 = load i32, ptr %5, align 4, !tbaa !9
  %31 = and i32 %30, 116
  %32 = icmp ne i32 %31, 0
  br i1 %32, label %33, label %42

33:                                               ; preds = %29
  %34 = load i64, ptr %4, align 8, !tbaa !5
  %35 = sub nsw i64 %34, 20
  %36 = sub i64 %35, 2
  %37 = sub i64 %36, 8
  %38 = udiv i64 %37, 2
  %39 = sub i64 %38, 2
  %40 = and i64 %39, -2
  %41 = sub i64 %40, 8
  store i64 %41, ptr %3, align 8
  br label %49

42:                                               ; preds = %29
  %43 = load i64, ptr %4, align 8, !tbaa !5
  %44 = sub nsw i64 %43, 20
  %45 = sdiv i64 %44, 2
  %46 = and i64 %45, -2
  %47 = sub i64 %46, 2
  %48 = sub i64 %47, 8
  store i64 %48, ptr %3, align 8
  br label %49

49:                                               ; preds = %42, %33, %28
  %50 = load i64, ptr %3, align 8
  ret i64 %50
}

attributes #0 = { cold nounwind optsize 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 #1 = { inlinehint nounwind willreturn memory(none) 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 #2 = { nocallback nofree nosync nounwind willreturn memory(none) }
attributes #3 = { cold nounwind optsize willreturn memory(none) 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 = { cold nounwind willreturn memory(read) }
attributes #5 = { nounwind willreturn memory(none) }

!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 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !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: cold mustprogress nofree nounwind optsize willreturn memory(read) uwtable
declare dso_local i64 @mdbx_default_pagesize() local_unnamed_addr #0

; Function Attrs: inlinehint mustprogress nofree nosync nounwind willreturn memory(none) uwtable
declare hidden zeroext i1 @is_powerof2(i64 noundef) local_unnamed_addr #1

; Function Attrs: cold mustprogress nofree nosync nounwind optsize willreturn memory(none) uwtable
define dso_local i64 @mdbx_limits_pairsize4page_max(i64 noundef %0, i32 noundef %1) local_unnamed_addr #2 {
  %3 = icmp slt i64 %0, 1
  br i1 %3, label %4, label %6

4:                                                ; preds = %2
  %5 = tail call i64 @mdbx_default_pagesize() #3
  br label %6

6:                                                ; preds = %4, %2
  %.09 = phi i64 [ %5, %4 ], [ %0, %2 ]
  %7 = add i64 %.09, -65537
  %or.cond = icmp ult i64 %7, -65281
  br i1 %or.cond, label %.critedge, label %8, !prof !5

8:                                                ; preds = %6
  %9 = tail call zeroext i1 @is_powerof2(i64 noundef %.09) #4
  br i1 %9, label %10, label %.critedge, !prof !6

10:                                               ; preds = %8
  %11 = and i32 %1, 116
  %.not = icmp eq i32 %11, 0
  br i1 %.not, label %17, label %12

12:                                               ; preds = %10
  %13 = add nsw i64 %.09, -30
  %14 = lshr i64 %13, 1
  %15 = and i64 %14, 9223372036854775806
  %16 = add nsw i64 %15, -10
  br label %.critedge

17:                                               ; preds = %10
  %.lhs.trunc = add nuw nsw i64 %.09, 65516
  %18 = lshr i64 %.lhs.trunc, 1
  %19 = and i64 %18, 32766
  %20 = add nsw i64 %19, -10
  br label %.critedge

.critedge:                                        ; preds = %6, %8, %17, %12
  %.0 = phi i64 [ %16, %12 ], [ %20, %17 ], [ -1, %8 ], [ -1, %6 ]
  ret i64 %.0
}

attributes #0 = { cold mustprogress nofree nounwind optsize 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 #1 = { inlinehint mustprogress nofree nosync nounwind willreturn memory(none) 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 #2 = { cold mustprogress nofree nosync nounwind optsize willreturn memory(none) 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 = { cold nounwind willreturn memory(read) }
attributes #4 = { nounwind willreturn memory(none) }

!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", i32 4001, i32 4000000}
!6 = !{!"branch_weights", !"expected", i32 2000, i32 1}


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