; LLVM IR from lzyrapx/Competitive-Programming :: HDUOJ/5628（Dirichlet卷积）（狄利克雷卷积）.ll (Z6qpowerv)

; 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"

@k = external dso_local global i32, align 4
@f = external dso_local global [100010 x i64], align 16
@ans = external dso_local global [100010 x i64], align 16
@x = external dso_local global [100010 x i64], align 16

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_Z9dirichletPxS_(ptr noundef, ptr noundef) #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z6qpowerv() #0 {
  br label %1

1:                                                ; preds = %9, %0
  %2 = load i32, ptr @k, align 4, !tbaa !5
  %3 = icmp ne i32 %2, 0
  br i1 %3, label %4, label %12

4:                                                ; preds = %1
  %5 = load i32, ptr @k, align 4, !tbaa !5
  %6 = and i32 %5, 1
  %7 = icmp ne i32 %6, 0
  br i1 %7, label %8, label %9

8:                                                ; preds = %4
  call void @_Z9dirichletPxS_(ptr noundef @ans, ptr noundef @x)
  br label %9

9:                                                ; preds = %8, %4
  %10 = load i32, ptr @k, align 4, !tbaa !5
  %11 = ashr i32 %10, 1
  store i32 %11, ptr @k, align 4, !tbaa !5
  call void @_Z9dirichletPxS_(ptr noundef @x, ptr noundef @x)
  br label %1, !llvm.loop !9

12:                                               ; preds = %1
  call void @_Z9dirichletPxS_(ptr noundef @ans, ptr noundef @f)
  ret void
}

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 = !{!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"}


; 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"

@k = external dso_local local_unnamed_addr global i32, align 4
@f = external dso_local global [100010 x i64], align 16
@ans = external dso_local global [100010 x i64], align 16
@x = external dso_local global [100010 x i64], align 16

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_Z9dirichletPxS_(ptr noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z6qpowerv() local_unnamed_addr #0 {
  %1 = load i32, ptr @k, align 4, !tbaa !5
  %.not2 = icmp eq i32 %1, 0
  br i1 %.not2, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %0, %5
  %2 = phi i32 [ %8, %5 ], [ %1, %0 ]
  %3 = and i32 %2, 1
  %.not1 = icmp eq i32 %3, 0
  br i1 %.not1, label %5, label %4

4:                                                ; preds = %.lr.ph
  tail call void @_Z9dirichletPxS_(ptr noundef nonnull @ans, ptr noundef nonnull @x)
  %.pre = load i32, ptr @k, align 4, !tbaa !5
  br label %5

5:                                                ; preds = %4, %.lr.ph
  %6 = phi i32 [ %.pre, %4 ], [ %2, %.lr.ph ]
  %7 = ashr i32 %6, 1
  store i32 %7, ptr @k, align 4, !tbaa !5
  tail call void @_Z9dirichletPxS_(ptr noundef nonnull @x, ptr noundef nonnull @x)
  %8 = load i32, ptr @k, align 4, !tbaa !5
  %.not = icmp eq i32 %8, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %5, %0
  tail call void @_Z9dirichletPxS_(ptr noundef nonnull @ans, ptr noundef nonnull @f)
  ret void
}

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 = !{!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,GVNPass,GlobalOptPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SimplifyCFGPass,TailCallElimPass