; 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 void @bitset_flip_list(ptr noundef %0, ptr noundef %1, i64 noundef %2) #1 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  %9 = alloca i64, align 8
  %10 = alloca i64, align 8
  %11 = alloca i64, align 8
  %12 = alloca ptr, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  store i64 %2, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  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
  %13 = load ptr, ptr %5, align 8, !tbaa !5
  %14 = load i64, ptr %6, align 8, !tbaa !9
  %15 = getelementptr inbounds i16, ptr %13, i64 %14
  store ptr %15, ptr %12, align 8, !tbaa !5
  br label %16

16:                                               ; preds = %20, %3
  %17 = load ptr, ptr %5, align 8, !tbaa !5
  %18 = load ptr, ptr %12, align 8, !tbaa !5
  %19 = icmp ne ptr %17, %18
  br i1 %19, label %20, label %42

20:                                               ; preds = %16
  %21 = load ptr, ptr %5, align 8, !tbaa !5
  %22 = load i16, ptr %21, align 2, !tbaa !11
  %23 = zext i16 %22 to i64
  store i64 %23, ptr %10, align 8, !tbaa !9
  %24 = load i64, ptr %10, align 8, !tbaa !9
  %25 = lshr i64 %24, 6
  store i64 %25, ptr %7, align 8, !tbaa !9
  %26 = load i64, ptr %10, align 8, !tbaa !9
  %27 = urem i64 %26, 64
  store i64 %27, ptr %11, align 8, !tbaa !9
  %28 = load ptr, ptr %4, align 8, !tbaa !5
  %29 = load i64, ptr %7, align 8, !tbaa !9
  %30 = getelementptr inbounds i64, ptr %28, i64 %29
  %31 = load i64, ptr %30, align 8, !tbaa !9
  store i64 %31, ptr %8, align 8, !tbaa !9
  %32 = load i64, ptr %8, align 8, !tbaa !9
  %33 = load i64, ptr %11, align 8, !tbaa !9
  %34 = shl i64 1, %33
  %35 = xor i64 %32, %34
  store i64 %35, ptr %9, align 8, !tbaa !9
  %36 = load i64, ptr %9, align 8, !tbaa !9
  %37 = load ptr, ptr %4, align 8, !tbaa !5
  %38 = load i64, ptr %7, align 8, !tbaa !9
  %39 = getelementptr inbounds i64, ptr %37, i64 %38
  store i64 %36, ptr %39, align 8, !tbaa !9
  %40 = load ptr, ptr %5, align 8, !tbaa !5
  %41 = getelementptr inbounds i16, ptr %40, i32 1
  store ptr %41, ptr %5, align 8, !tbaa !5
  br label %16, !llvm.loop !13

42:                                               ; preds = %16
  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
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  ret void
}

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 void @bitset_flip_list(ptr nocapture noundef %0, ptr noundef readonly %1, i64 noundef %2) local_unnamed_addr #0 {
  %4 = getelementptr inbounds i16, ptr %1, i64 %2
  %.not14 = icmp eq i64 %2, 0
  br i1 %.not14, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %3, %.lr.ph
  %.015 = phi ptr [ %13, %.lr.ph ], [ %1, %3 ]
  %5 = load i16, ptr %.015, align 2, !tbaa !5
  %6 = zext i16 %5 to i64
  %7 = lshr i64 %6, 6
  %8 = and i64 %6, 63
  %9 = getelementptr inbounds i64, ptr %0, i64 %7
  %10 = load i64, ptr %9, align 8, !tbaa !9
  %11 = shl nuw i64 1, %8
  %12 = xor i64 %11, %10
  store i64 %12, ptr %9, align 8, !tbaa !9
  %13 = getelementptr inbounds i8, ptr %.015, i64 2
  %.not = icmp eq ptr %13, %4
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !11

._crit_edge:                                      ; preds = %.lr.ph, %3
  ret void
}

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,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass