; LLVM IR from fast-pack/FastPFOR :: src/benchbitpacking.ll (Z7maskfncRSt6vectorIjN11FastPForLib19AlignedSTLAllocatorIjLm64EEEEj)

; 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.__gnu_cxx::__normal_iterator" = type { 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

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z7maskfncRSt6vectorIjN11FastPForLib19AlignedSTLAllocatorIjLm64EEEEj(ptr noundef nonnull align 8 dereferenceable(24) %0, i32 noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %6 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  %7 = load i32, ptr %4, align 4, !tbaa !9
  %8 = icmp eq i32 %7, 32
  br i1 %8, label %9, label %10

9:                                                ; preds = %2
  br label %29

10:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  %11 = load ptr, ptr %3, align 8, !tbaa !5
  %12 = call ptr @_ZNSt6vectorIjN11FastPForLib19AlignedSTLAllocatorIjLm64EEEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %11) #3
  %13 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %5, i32 0, i32 0
  store ptr %12, ptr %13, align 8
  br label %14

14:                                               ; preds = %27, %10
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %15 = load ptr, ptr %3, align 8, !tbaa !5
  %16 = call ptr @_ZNSt6vectorIjN11FastPForLib19AlignedSTLAllocatorIjLm64EEEE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %15) #3
  %17 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %6, i32 0, i32 0
  store ptr %16, ptr %17, align 8
  %18 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPjSt6vectorIjN11FastPForLib19AlignedSTLAllocatorIjLm64EEEEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8) %5, ptr noundef nonnull align 8 dereferenceable(8) %6) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  br i1 %18, label %20, label %19

19:                                               ; preds = %14
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  br label %29

20:                                               ; preds = %14
  %21 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPjSt6vectorIjN11FastPForLib19AlignedSTLAllocatorIjLm64EEEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %5) #3
  %22 = load i32, ptr %21, align 4, !tbaa !9
  %23 = load i32, ptr %4, align 4, !tbaa !9
  %24 = shl i32 1, %23
  %25 = urem i32 %22, %24
  %26 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPjSt6vectorIjN11FastPForLib19AlignedSTLAllocatorIjLm64EEEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %5) #3
  store i32 %25, ptr %26, align 4, !tbaa !9
  br label %27

27:                                               ; preds = %20
  %28 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPjSt6vectorIjN11FastPForLib19AlignedSTLAllocatorIjLm64EEEEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %5) #3
  br label %14, !llvm.loop !11

29:                                               ; preds = %19, %9
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIjN11FastPForLib19AlignedSTLAllocatorIjLm64EEEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) #1 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN9__gnu_cxxneIPjSt6vectorIjN11FastPForLib19AlignedSTLAllocatorIjLm64EEEEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIjN11FastPForLib19AlignedSTLAllocatorIjLm64EEEE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPjSt6vectorIjN11FastPForLib19AlignedSTLAllocatorIjLm64EEEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPjSt6vectorIjN11FastPForLib19AlignedSTLAllocatorIjLm64EEEEEppEv(ptr noundef nonnull align 8 dereferenceable(8)) #1 align 2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { inlinehint 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 #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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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"

%"class.__gnu_cxx::__normal_iterator" = type { ptr }

; 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

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z7maskfncRSt6vectorIjN11FastPForLib19AlignedSTLAllocatorIjLm64EEEEj(ptr noundef nonnull align 8 dereferenceable(24) %0, i32 noundef %1) local_unnamed_addr #1 {
  %3 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %4 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %5 = icmp eq i32 %1, 32
  br i1 %5, label %19, label %6

6:                                                ; preds = %2
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #3
  %7 = tail call ptr @_ZNSt6vectorIjN11FastPForLib19AlignedSTLAllocatorIjLm64EEEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #3
  store ptr %7, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #3
  %8 = tail call ptr @_ZNSt6vectorIjN11FastPForLib19AlignedSTLAllocatorIjLm64EEEE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #3
  store ptr %8, ptr %4, align 8
  %9 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPjSt6vectorIjN11FastPForLib19AlignedSTLAllocatorIjLm64EEEEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(8) %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #3
  br i1 %9, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %6
  %notmask = shl nsw i32 -1, %1
  %10 = xor i32 %notmask, -1
  br label %11

._crit_edge:                                      ; preds = %11, %6
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  br label %19

11:                                               ; preds = %.lr.ph, %11
  %12 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPjSt6vectorIjN11FastPForLib19AlignedSTLAllocatorIjLm64EEEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %3) #3
  %13 = load i32, ptr %12, align 4, !tbaa !5
  %14 = and i32 %13, %10
  %15 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPjSt6vectorIjN11FastPForLib19AlignedSTLAllocatorIjLm64EEEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %3) #3
  store i32 %14, ptr %15, align 4, !tbaa !5
  %16 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPjSt6vectorIjN11FastPForLib19AlignedSTLAllocatorIjLm64EEEEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %3) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #3
  %17 = call ptr @_ZNSt6vectorIjN11FastPForLib19AlignedSTLAllocatorIjLm64EEEE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #3
  store ptr %17, ptr %4, align 8
  %18 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPjSt6vectorIjN11FastPForLib19AlignedSTLAllocatorIjLm64EEEEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(8) %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #3
  br i1 %18, label %11, label %._crit_edge, !llvm.loop !9

19:                                               ; preds = %2, %._crit_edge
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIjN11FastPForLib19AlignedSTLAllocatorIjLm64EEEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #1 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN9__gnu_cxxneIPjSt6vectorIjN11FastPForLib19AlignedSTLAllocatorIjLm64EEEEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIjN11FastPForLib19AlignedSTLAllocatorIjLm64EEEE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPjSt6vectorIjN11FastPForLib19AlignedSTLAllocatorIjLm64EEEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPjSt6vectorIjN11FastPForLib19AlignedSTLAllocatorIjLm64EEEEEppEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #1 align 2

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { inlinehint 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 #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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass