; LLVM IR from tfhe/spqlios-arithmetic :: spqlios/cplx (cplx_fft_ref)

; 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"

%struct.cplx_fft_precomp = type { ptr, i64, i64, ptr, ptr }

; 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 @cplx_fft_ref_bfs_2(ptr noundef, ptr noundef, i32 noundef) #1

; Function Attrs: nounwind uwtable
declare dso_local void @cplx_fft_ref_bfs_16(ptr noundef, ptr noundef, i32 noundef) #1

; Function Attrs: nounwind uwtable
declare dso_local void @cplx_fft_ref_rec_16(ptr noundef, ptr noundef, i32 noundef) #1

; Function Attrs: nounwind uwtable
define dso_local void @cplx_fft_ref(ptr noundef %0, ptr noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  %8 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %9, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  %10 = load ptr, ptr %3, align 8, !tbaa !5
  %11 = getelementptr inbounds %struct.cplx_fft_precomp, ptr %10, i32 0, i32 1
  %12 = load i64, ptr %11, align 8, !tbaa !9
  %13 = trunc i64 %12 to i32
  store i32 %13, ptr %6, align 4, !tbaa !12
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  %14 = load ptr, ptr %3, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct.cplx_fft_precomp, ptr %14, i32 0, i32 3
  %16 = load ptr, ptr %15, align 8, !tbaa !14
  store ptr %16, ptr %7, align 8, !tbaa !5
  %17 = load i32, ptr %6, align 4, !tbaa !12
  %18 = icmp eq i32 %17, 1
  br i1 %18, label %19, label %20

19:                                               ; preds = %2
  store i32 1, ptr %8, align 4
  br label %35

20:                                               ; preds = %2
  %21 = load i32, ptr %6, align 4, !tbaa !12
  %22 = icmp sle i32 %21, 8
  br i1 %22, label %23, label %26

23:                                               ; preds = %20
  %24 = load ptr, ptr %5, align 8, !tbaa !5
  %25 = load i32, ptr %6, align 4, !tbaa !12
  call void @cplx_fft_ref_bfs_2(ptr noundef %24, ptr noundef %7, i32 noundef %25)
  store i32 1, ptr %8, align 4
  br label %35

26:                                               ; preds = %20
  %27 = load i32, ptr %6, align 4, !tbaa !12
  %28 = icmp sle i32 %27, 2048
  br i1 %28, label %29, label %32

29:                                               ; preds = %26
  %30 = load ptr, ptr %5, align 8, !tbaa !5
  %31 = load i32, ptr %6, align 4, !tbaa !12
  call void @cplx_fft_ref_bfs_16(ptr noundef %30, ptr noundef %7, i32 noundef %31)
  store i32 1, ptr %8, align 4
  br label %35

32:                                               ; preds = %26
  %33 = load ptr, ptr %5, align 8, !tbaa !5
  %34 = load i32, ptr %6, align 4, !tbaa !12
  call void @cplx_fft_ref_rec_16(ptr noundef %33, ptr noundef %7, i32 noundef %34)
  store i32 0, ptr %8, align 4
  br label %35

35:                                               ; preds = %32, %29, %23, %19
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  %36 = load i32, ptr %8, align 4
  switch i32 %36, label %38 [
    i32 0, label %37
    i32 1, label %37
  ]

37:                                               ; preds = %35, %35
  ret void

38:                                               ; preds = %35
  unreachable
}

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, !11, i64 8}
!10 = !{!"cplx_fft_precomp", !6, i64 0, !11, i64 8, !11, i64 16, !6, i64 24, !6, i64 32}
!11 = !{!"long", !7, i64 0}
!12 = !{!13, !13, i64 0}
!13 = !{!"int", !7, i64 0}
!14 = !{!10, !6, i64 24}


; 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 nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress 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 @cplx_fft_ref_bfs_2(ptr noundef, ptr noundef, i32 noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
declare dso_local void @cplx_fft_ref_bfs_16(ptr noundef, ptr noundef, i32 noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
declare dso_local void @cplx_fft_ref_rec_16(ptr noundef, ptr noundef, i32 noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local void @cplx_fft_ref(ptr nocapture noundef readonly %0, ptr noundef %1) local_unnamed_addr #1 {
  %3 = alloca ptr, align 8
  %4 = getelementptr inbounds i8, ptr %0, i64 8
  %5 = load i64, ptr %4, align 8, !tbaa !5
  %6 = trunc i64 %5 to i32
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #2
  %7 = getelementptr inbounds i8, ptr %0, i64 24
  %8 = load ptr, ptr %7, align 8, !tbaa !11
  store ptr %8, ptr %3, align 8, !tbaa !12
  %9 = icmp eq i32 %6, 1
  br i1 %9, label %17, label %10

10:                                               ; preds = %2
  %11 = icmp slt i32 %6, 9
  br i1 %11, label %12, label %13

12:                                               ; preds = %10
  call void @cplx_fft_ref_bfs_2(ptr noundef %1, ptr noundef nonnull %3, i32 noundef %6)
  br label %17

13:                                               ; preds = %10
  %14 = icmp ult i32 %6, 2049
  br i1 %14, label %15, label %16

15:                                               ; preds = %13
  call void @cplx_fft_ref_bfs_16(ptr noundef %1, ptr noundef nonnull %3, i32 noundef %6)
  br label %17

16:                                               ; preds = %13
  call void @cplx_fft_ref_rec_16(ptr noundef %1, ptr noundef nonnull %3, i32 noundef %6)
  br label %17

17:                                               ; preds = %2, %16, %15, %12
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #2
  ret void
}

attributes #0 = { mustprogress 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, !10, i64 8}
!6 = !{!"cplx_fft_precomp", !7, i64 0, !10, i64 8, !10, i64 16, !7, i64 24, !7, i64 32}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"long", !8, i64 0}
!11 = !{!6, !7, i64 24}
!12 = !{!7, !7, i64 0}


; Effective O3 passes: CorrelatedValuePropagationPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass