; LLVM IR from VastoLorde95/Competitive-Programming :: Codeforces/307 Division 2/Problem D/D.ll (Z3fibxRxS_)

; 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"

@m = external dso_local global i64, align 8

; Function Attrs: mustprogress uwtable
define dso_local void @_Z3fibxRxS_(i64 noundef %0, ptr noundef nonnull align 8 dereferenceable(8) %1, ptr noundef nonnull align 8 dereferenceable(8) %2) #0 {
  %4 = alloca i64, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  store i64 %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !9
  store ptr %2, ptr %6, align 8, !tbaa !9
  %9 = load i64, ptr %4, align 8, !tbaa !5
  %10 = icmp eq i64 %9, 1
  br i1 %10, label %11, label %14

11:                                               ; preds = %3
  %12 = load ptr, ptr %6, align 8, !tbaa !9
  store i64 1, ptr %12, align 8, !tbaa !5
  %13 = load ptr, ptr %5, align 8, !tbaa !9
  store i64 1, ptr %13, align 8, !tbaa !5
  br label %58

14:                                               ; preds = %3
  %15 = load i64, ptr %4, align 8, !tbaa !5
  %16 = and i64 %15, 1
  %17 = icmp ne i64 %16, 0
  br i1 %17, label %18, label %31

18:                                               ; preds = %14
  %19 = load i64, ptr %4, align 8, !tbaa !5
  %20 = sub nsw i64 %19, 1
  %21 = load ptr, ptr %6, align 8, !tbaa !9
  %22 = load ptr, ptr %5, align 8, !tbaa !9
  call void @_Z3fibxRxS_(i64 noundef %20, ptr noundef nonnull align 8 dereferenceable(8) %21, ptr noundef nonnull align 8 dereferenceable(8) %22)
  %23 = load ptr, ptr %6, align 8, !tbaa !9
  %24 = load i64, ptr %23, align 8, !tbaa !5
  %25 = load ptr, ptr %5, align 8, !tbaa !9
  %26 = load i64, ptr %25, align 8, !tbaa !5
  %27 = add nsw i64 %24, %26
  %28 = load i64, ptr @m, align 8, !tbaa !5
  %29 = srem i64 %27, %28
  %30 = load ptr, ptr %6, align 8, !tbaa !9
  store i64 %29, ptr %30, align 8, !tbaa !5
  br label %58

31:                                               ; preds = %14
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  %32 = load i64, ptr %4, align 8, !tbaa !5
  %33 = ashr i64 %32, 1
  call void @_Z3fibxRxS_(i64 noundef %33, ptr noundef nonnull align 8 dereferenceable(8) %7, ptr noundef nonnull align 8 dereferenceable(8) %8)
  %34 = load i64, ptr %7, align 8, !tbaa !5
  %35 = load i64, ptr %7, align 8, !tbaa !5
  %36 = mul nsw i64 %34, %35
  %37 = load i64, ptr %8, align 8, !tbaa !5
  %38 = load i64, ptr %8, align 8, !tbaa !5
  %39 = mul nsw i64 %37, %38
  %40 = add nsw i64 %36, %39
  %41 = load i64, ptr @m, align 8, !tbaa !5
  %42 = srem i64 %40, %41
  %43 = load ptr, ptr %6, align 8, !tbaa !9
  store i64 %42, ptr %43, align 8, !tbaa !5
  %44 = load i64, ptr %7, align 8, !tbaa !5
  %45 = load i64, ptr %8, align 8, !tbaa !5
  %46 = mul nsw i64 %44, %45
  %47 = load i64, ptr %7, align 8, !tbaa !5
  %48 = load i64, ptr %8, align 8, !tbaa !5
  %49 = load i64, ptr %7, align 8, !tbaa !5
  %50 = sub nsw i64 %48, %49
  %51 = load i64, ptr @m, align 8, !tbaa !5
  %52 = add nsw i64 %50, %51
  %53 = mul nsw i64 %47, %52
  %54 = add nsw i64 %46, %53
  %55 = load i64, ptr @m, align 8, !tbaa !5
  %56 = srem i64 %54, %55
  %57 = load ptr, ptr %5, align 8, !tbaa !9
  store i64 %56, ptr %57, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  br label %58

58:                                               ; preds = %31, %18, %11
  ret void
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

attributes #0 = { mustprogress 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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}


; 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"

@m = external dso_local local_unnamed_addr global i64, align 8

; Function Attrs: mustprogress nofree nosync nounwind memory(read, argmem: readwrite, inaccessiblemem: none) uwtable
define dso_local void @_Z3fibxRxS_(i64 noundef %0, ptr nocapture noundef nonnull align 8 dereferenceable(8) %1, ptr nocapture noundef nonnull align 8 dereferenceable(8) %2) local_unnamed_addr #0 {
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = icmp eq i64 %0, 1
  br i1 %6, label %7, label %8

7:                                                ; preds = %3
  store i64 1, ptr %2, align 8, !tbaa !5
  store i64 1, ptr %1, align 8, !tbaa !5
  br label %common.ret12

8:                                                ; preds = %3
  %9 = and i64 %0, 1
  %.not = icmp eq i64 %9, 0
  br i1 %.not, label %17, label %10

common.ret12:                                     ; preds = %17, %7, %10
  ret void

10:                                               ; preds = %8
  %11 = add nsw i64 %0, -1
  tail call void @_Z3fibxRxS_(i64 noundef %11, ptr noundef nonnull align 8 dereferenceable(8) %2, ptr noundef nonnull align 8 dereferenceable(8) %1)
  %12 = load i64, ptr %2, align 8, !tbaa !5
  %13 = load i64, ptr %1, align 8, !tbaa !5
  %14 = add nsw i64 %13, %12
  %15 = load i64, ptr @m, align 8, !tbaa !5
  %16 = srem i64 %14, %15
  store i64 %16, ptr %2, align 8, !tbaa !5
  br label %common.ret12

17:                                               ; preds = %8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %5) #2
  %18 = ashr exact i64 %0, 1
  call void @_Z3fibxRxS_(i64 noundef %18, ptr noundef nonnull align 8 dereferenceable(8) %4, ptr noundef nonnull align 8 dereferenceable(8) %5)
  %19 = load i64, ptr %4, align 8, !tbaa !5
  %20 = mul nsw i64 %19, %19
  %21 = load i64, ptr %5, align 8, !tbaa !5
  %22 = mul nsw i64 %21, %21
  %23 = add nuw nsw i64 %22, %20
  %24 = load i64, ptr @m, align 8, !tbaa !5
  %25 = srem i64 %23, %24
  store i64 %25, ptr %2, align 8, !tbaa !5
  %26 = load i64, ptr @m, align 8, !tbaa !5
  %factor = shl i64 %21, 1
  %27 = sub i64 %factor, %19
  %28 = add i64 %27, %26
  %29 = mul i64 %28, %19
  %30 = srem i64 %29, %26
  store i64 %30, ptr %1, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %5) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #2
  br label %common.ret12
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

attributes #0 = { mustprogress nofree 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" }
attributes #1 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass