; LLVM IR from jermp/2i_bench :: external/CRoaring/src (bitset_util)

; 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
define dso_local i64 @bitset_clear_list(ptr noundef %0, i64 noundef %1, ptr noundef %2, i64 noundef %3) #1 {
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca ptr, align 8
  %8 = alloca i64, align 8
  %9 = alloca i64, align 8
  %10 = alloca i64, align 8
  %11 = alloca i64, align 8
  %12 = alloca i64, align 8
  %13 = alloca i64, align 8
  %14 = alloca ptr, 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 i64 %3, ptr %8, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %11) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %12) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %13) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %14) #2
  %15 = load ptr, ptr %7, align 8, !tbaa !5
  %16 = load i64, ptr %8, align 8, !tbaa !9
  %17 = getelementptr inbounds i16, ptr %15, i64 %16
  store ptr %17, ptr %14, align 8, !tbaa !5
  br label %18

18:                                               ; preds = %22, %4
  %19 = load ptr, ptr %7, align 8, !tbaa !5
  %20 = load ptr, ptr %14, align 8, !tbaa !5
  %21 = icmp ne ptr %19, %20
  br i1 %21, label %22, label %52

22:                                               ; preds = %18
  %23 = load ptr, ptr %7, align 8, !tbaa !5
  %24 = load i16, ptr %23, align 2, !tbaa !11
  %25 = zext i16 %24 to i64
  store i64 %25, ptr %12, align 8, !tbaa !9
  %26 = load i64, ptr %12, align 8, !tbaa !9
  %27 = lshr i64 %26, 6
  store i64 %27, ptr %9, align 8, !tbaa !9
  %28 = load i64, ptr %12, align 8, !tbaa !9
  %29 = urem i64 %28, 64
  store i64 %29, ptr %13, align 8, !tbaa !9
  %30 = load ptr, ptr %5, align 8, !tbaa !5
  %31 = load i64, ptr %9, align 8, !tbaa !9
  %32 = getelementptr inbounds i64, ptr %30, i64 %31
  %33 = load i64, ptr %32, align 8, !tbaa !9
  store i64 %33, ptr %10, align 8, !tbaa !9
  %34 = load i64, ptr %10, align 8, !tbaa !9
  %35 = load i64, ptr %13, align 8, !tbaa !9
  %36 = shl i64 1, %35
  %37 = xor i64 %36, -1
  %38 = and i64 %34, %37
  store i64 %38, ptr %11, align 8, !tbaa !9
  %39 = load i64, ptr %10, align 8, !tbaa !9
  %40 = load i64, ptr %11, align 8, !tbaa !9
  %41 = xor i64 %39, %40
  %42 = load i64, ptr %13, align 8, !tbaa !9
  %43 = lshr i64 %41, %42
  %44 = load i64, ptr %6, align 8, !tbaa !9
  %45 = sub i64 %44, %43
  store i64 %45, ptr %6, align 8, !tbaa !9
  %46 = load i64, ptr %11, align 8, !tbaa !9
  %47 = load ptr, ptr %5, align 8, !tbaa !5
  %48 = load i64, ptr %9, align 8, !tbaa !9
  %49 = getelementptr inbounds i64, ptr %47, i64 %48
  store i64 %46, ptr %49, align 8, !tbaa !9
  %50 = load ptr, ptr %7, align 8, !tbaa !5
  %51 = getelementptr inbounds i16, ptr %50, i32 1
  store ptr %51, ptr %7, align 8, !tbaa !5
  br label %18, !llvm.loop !13

52:                                               ; preds = %18
  %53 = load i64, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %14) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %13) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %12) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #2
  ret i64 %53
}

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 }

!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 = !{!"short", !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: nofree norecurse nosync nounwind memory(read, argmem: readwrite, inaccessiblemem: none) uwtable
define dso_local i64 @bitset_clear_list(ptr nocapture noundef %0, i64 noundef %1, ptr noundef readonly %2, i64 noundef %3) local_unnamed_addr #0 {
  %5 = getelementptr inbounds i16, ptr %2, i64 %3
  %.not20 = icmp eq i64 %3, 0
  br i1 %.not20, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %4, %.lr.ph
  %.022 = phi i64 [ %17, %.lr.ph ], [ %1, %4 ]
  %.01921 = phi ptr [ %18, %.lr.ph ], [ %2, %4 ]
  %6 = load i16, ptr %.01921, align 2, !tbaa !5
  %7 = zext i16 %6 to i64
  %8 = lshr i64 %7, 6
  %9 = and i64 %7, 63
  %10 = getelementptr inbounds i64, ptr %0, i64 %8
  %11 = load i64, ptr %10, align 8, !tbaa !9
  %12 = shl nuw i64 1, %9
  %13 = xor i64 %12, -1
  %14 = and i64 %11, %13
  %15 = lshr i64 %11, %9
  %16 = and i64 %15, 1
  %17 = sub i64 %.022, %16
  store i64 %14, ptr %10, align 8, !tbaa !9
  %18 = getelementptr inbounds i8, ptr %.01921, i64 2
  %.not = icmp eq ptr %18, %5
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !11

._crit_edge:                                      ; preds = %.lr.ph, %4
  %.0.lcssa = phi i64 [ %1, %4 ], [ %17, %.lr.ph ]
  ret i64 %.0.lcssa
}

attributes #0 = { nofree norecurse nosync nounwind memory(read, argmem: readwrite, inaccessiblemem: 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 = !{!"short", !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 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass