; LLVM IR from GuillaumeHolley/BloomFilterTrie :: src (log2)

; 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"

@MultiplyDeBruijnBitPosition_power2 = external dso_local constant [32 x i32], align 16

; Function Attrs: inlinehint nounwind uwtable
define dso_local i32 @get_nb_bytes_power2_comp(i32 noundef %0) #0 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  %6 = load i32, ptr %3, align 4, !tbaa !5
  %7 = mul i32 %6, 125613361
  %8 = lshr i32 %7, 27
  %9 = zext i32 %8 to i64
  %10 = getelementptr inbounds [32 x i32], ptr @MultiplyDeBruijnBitPosition_power2, i64 0, i64 %9
  %11 = load i32, ptr %10, align 4, !tbaa !5
  store i32 %11, ptr %4, align 4, !tbaa !5
  %12 = load i32, ptr %4, align 4, !tbaa !5
  %13 = icmp sgt i32 %12, 6
  br i1 %13, label %14, label %26

14:                                               ; preds = %1
  %15 = load i32, ptr %4, align 4, !tbaa !5
  %16 = sub nsw i32 %15, 6
  %17 = sdiv i32 %16, 7
  %18 = load i32, ptr %4, align 4, !tbaa !5
  %19 = sub nsw i32 %18, 6
  %20 = srem i32 %19, 7
  %21 = icmp sgt i32 %20, 0
  %22 = zext i1 %21 to i64
  %23 = select i1 %21, i32 1, i32 0
  %24 = add nsw i32 %17, %23
  %25 = add nsw i32 %24, 1
  store i32 %25, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %27

26:                                               ; preds = %1
  store i32 1, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %27

27:                                               ; preds = %26, %14
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  %28 = load i32, ptr %2, align 4
  ret i32 %28
}

; 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 = { inlinehint 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


; 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"

@MultiplyDeBruijnBitPosition_power2 = external dso_local local_unnamed_addr constant [32 x i32], align 16

; Function Attrs: inlinehint mustprogress nofree norecurse nosync nounwind willreturn memory(none) uwtable
define dso_local range(i32 1, 306783380) i32 @get_nb_bytes_power2_comp(i32 noundef %0) local_unnamed_addr #0 {
  %2 = mul i32 %0, 125613361
  %3 = lshr i32 %2, 27
  %4 = zext nneg i32 %3 to i64
  %5 = getelementptr inbounds [32 x i32], ptr @MultiplyDeBruijnBitPosition_power2, i64 0, i64 %4
  %6 = load i32, ptr %5, align 4, !tbaa !5
  %7 = icmp sgt i32 %6, 6
  br i1 %7, label %8, label %15

8:                                                ; preds = %1
  %9 = add nsw i32 %6, -6
  %10 = udiv i32 %9, 7
  %11 = urem i32 %9, 7
  %.not = icmp ne i32 %11, 0
  %12 = zext i1 %.not to i32
  %13 = add nuw nsw i32 %10, 1
  %14 = add nuw nsw i32 %13, %12
  br label %15

15:                                               ; preds = %1, %8
  %.0 = phi i32 [ %14, %8 ], [ 1, %1 ]
  ret i32 %.0
}

attributes #0 = { inlinehint mustprogress nofree norecurse 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" }

!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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass