; LLVM IR from fast-pack/FastPFOR :: src/benchbitpacking.ll (ZN11FastPForLib7ZRandom8getValueEj)

; 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: 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 uwtable
define dso_local noundef i32 @_ZN11FastPForLib7ZRandom8getValueEj(ptr noundef nonnull align 8 dereferenceable(7500) %0, i32 noundef %1) #1 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  %7 = load ptr, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  %8 = load i32, ptr %4, align 4, !tbaa !9
  store i32 %8, ptr %5, align 4, !tbaa !9
  %9 = load i32, ptr %5, align 4, !tbaa !9
  %10 = lshr i32 %9, 1
  %11 = load i32, ptr %5, align 4, !tbaa !9
  %12 = or i32 %11, %10
  store i32 %12, ptr %5, align 4, !tbaa !9
  %13 = load i32, ptr %5, align 4, !tbaa !9
  %14 = lshr i32 %13, 2
  %15 = load i32, ptr %5, align 4, !tbaa !9
  %16 = or i32 %15, %14
  store i32 %16, ptr %5, align 4, !tbaa !9
  %17 = load i32, ptr %5, align 4, !tbaa !9
  %18 = lshr i32 %17, 4
  %19 = load i32, ptr %5, align 4, !tbaa !9
  %20 = or i32 %19, %18
  store i32 %20, ptr %5, align 4, !tbaa !9
  %21 = load i32, ptr %5, align 4, !tbaa !9
  %22 = lshr i32 %21, 8
  %23 = load i32, ptr %5, align 4, !tbaa !9
  %24 = or i32 %23, %22
  store i32 %24, ptr %5, align 4, !tbaa !9
  %25 = load i32, ptr %5, align 4, !tbaa !9
  %26 = lshr i32 %25, 16
  %27 = load i32, ptr %5, align 4, !tbaa !9
  %28 = or i32 %27, %26
  store i32 %28, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  br label %29

29:                                               ; preds = %33, %2
  %30 = call noundef i32 @_ZN11FastPForLib7ZRandom8getValueEv(ptr noundef nonnull align 8 dereferenceable(7500) %7)
  %31 = load i32, ptr %5, align 4, !tbaa !9
  %32 = and i32 %30, %31
  store i32 %32, ptr %6, align 4, !tbaa !9
  br label %33

33:                                               ; preds = %29
  %34 = load i32, ptr %6, align 4, !tbaa !9
  %35 = load i32, ptr %4, align 4, !tbaa !9
  %36 = icmp ugt i32 %34, %35
  br i1 %36, label %29, label %37, !llvm.loop !11

37:                                               ; preds = %33
  %38 = load i32, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  ret i32 %38
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_ZN11FastPForLib7ZRandom8getValueEv(ptr noundef nonnull align 8 dereferenceable(7500)) #2 align 2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress 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 = { 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"

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_ZN11FastPForLib7ZRandom8getValueEj(ptr noundef nonnull align 8 dereferenceable(7500) %0, i32 noundef %1) local_unnamed_addr #0 align 2 {
  %3 = lshr i32 %1, 1
  %4 = or i32 %3, %1
  %5 = lshr i32 %4, 2
  %6 = or i32 %5, %4
  %7 = lshr i32 %6, 4
  %8 = or i32 %7, %6
  %9 = lshr i32 %8, 8
  %10 = or i32 %9, %8
  %11 = lshr i32 %10, 16
  %12 = or i32 %11, %10
  br label %13

13:                                               ; preds = %13, %2
  %14 = tail call noundef i32 @_ZN11FastPForLib7ZRandom8getValueEv(ptr noundef nonnull align 8 dereferenceable(7500) %0)
  %15 = and i32 %14, %12
  %16 = icmp ugt i32 %15, %1
  br i1 %16, label %13, label %17, !llvm.loop !5

17:                                               ; preds = %13
  ret i32 %15
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_ZN11FastPForLib7ZRandom8getValueEv(ptr noundef nonnull align 8 dereferenceable(7500)) local_unnamed_addr #0 align 2

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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass