; LLVM IR from fast-pack/simdcomp :: src (simdbitpacking)

; 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: nounwind uwtable
declare dso_local void @simdpack(ptr noundef, ptr noundef, i32 noundef) #1

; Function Attrs: nounwind uwtable
declare dso_local ptr @simdpack_shortlength(ptr noundef, i32 noundef, ptr noundef, i32 noundef) #2

; Function Attrs: nounwind uwtable
define dso_local ptr @simdpack_length(ptr noundef %0, i64 noundef %1, ptr noundef %2, i32 noundef %3) #1 {
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca ptr, align 8
  %8 = alloca i32, align 4
  %9 = alloca i64, align 8
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i64 %1, ptr %6, align 8, !tbaa !9
  store ptr %2, ptr %7, align 8, !tbaa !5
  store i32 %3, ptr %8, align 4, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #3
  store i64 0, ptr %9, align 8, !tbaa !9
  br label %10

10:                                               ; preds = %25, %4
  %11 = load i64, ptr %9, align 8, !tbaa !9
  %12 = load i64, ptr %6, align 8, !tbaa !9
  %13 = udiv i64 %12, 128
  %14 = icmp ult i64 %11, %13
  br i1 %14, label %15, label %28

15:                                               ; preds = %10
  %16 = load ptr, ptr %5, align 8, !tbaa !5
  %17 = load ptr, ptr %7, align 8, !tbaa !5
  %18 = load i32, ptr %8, align 4, !tbaa !11
  call void @simdpack(ptr noundef %16, ptr noundef %17, i32 noundef %18)
  %19 = load ptr, ptr %5, align 8, !tbaa !5
  %20 = getelementptr inbounds i32, ptr %19, i64 128
  store ptr %20, ptr %5, align 8, !tbaa !5
  %21 = load i32, ptr %8, align 4, !tbaa !11
  %22 = load ptr, ptr %7, align 8, !tbaa !5
  %23 = zext i32 %21 to i64
  %24 = getelementptr inbounds <2 x i64>, ptr %22, i64 %23
  store ptr %24, ptr %7, align 8, !tbaa !5
  br label %25

25:                                               ; preds = %15
  %26 = load i64, ptr %9, align 8, !tbaa !9
  %27 = add i64 %26, 1
  store i64 %27, ptr %9, align 8, !tbaa !9
  br label %10, !llvm.loop !13

28:                                               ; preds = %10
  %29 = load ptr, ptr %5, align 8, !tbaa !5
  %30 = load i64, ptr %6, align 8, !tbaa !9
  %31 = urem i64 %30, 128
  %32 = trunc i64 %31 to i32
  %33 = load ptr, ptr %7, align 8, !tbaa !5
  %34 = load i32, ptr %8, align 4, !tbaa !11
  %35 = call ptr @simdpack_shortlength(ptr noundef %29, i32 noundef %32, ptr noundef %33, i32 noundef %34)
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #3
  ret ptr %35
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 = { nounwind uwtable "min-legal-vector-width"="128" "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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"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: nounwind uwtable
declare dso_local void @simdpack(ptr noundef, ptr noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local ptr @simdpack_shortlength(ptr noundef, i32 noundef, ptr noundef, i32 noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local ptr @simdpack_length(ptr noundef %0, i64 noundef %1, ptr noundef %2, i32 noundef %3) local_unnamed_addr #0 {
  %5 = lshr i64 %1, 7
  %.not = icmp ult i64 %1, 128
  br i1 %.not, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %4
  %6 = zext i32 %3 to i64
  br label %7

7:                                                ; preds = %.lr.ph, %7
  %.016 = phi i64 [ 0, %.lr.ph ], [ %10, %7 ]
  %.01215 = phi ptr [ %0, %.lr.ph ], [ %8, %7 ]
  %.01314 = phi ptr [ %2, %.lr.ph ], [ %9, %7 ]
  tail call void @simdpack(ptr noundef %.01215, ptr noundef %.01314, i32 noundef %3)
  %8 = getelementptr inbounds i8, ptr %.01215, i64 512
  %9 = getelementptr inbounds <2 x i64>, ptr %.01314, i64 %6
  %10 = add nuw nsw i64 %.016, 1
  %exitcond.not = icmp eq i64 %10, %5
  br i1 %exitcond.not, label %._crit_edge, label %7, !llvm.loop !5

._crit_edge:                                      ; preds = %7, %4
  %.013.lcssa = phi ptr [ %2, %4 ], [ %9, %7 ]
  %.012.lcssa = phi ptr [ %0, %4 ], [ %8, %7 ]
  %11 = trunc i64 %1 to i32
  %12 = and i32 %11, 127
  %13 = tail call ptr @simdpack_shortlength(ptr noundef %.012.lcssa, i32 noundef %12, ptr noundef %.013.lcssa, i32 noundef %3)
  ret ptr %13
}

attributes #0 = { 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 = { nounwind uwtable "min-legal-vector-width"="128" "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,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass