; LLVM IR from pranjalwalia/Competitive-programming :: codeforces/contests/565D3/A.ll (Z5solvex)

; 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: mustprogress nounwind uwtable
declare dso_local noundef i64 @_Z5checkx(i64 noundef) #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i64 @_Z5solvex(i64 noundef %0) #0 {
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i32, align 4
  store i64 %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #2
  store i64 0, ptr %4, align 8, !tbaa !5
  br label %6

6:                                                ; preds = %44, %1
  %7 = load i64, ptr %3, align 8, !tbaa !5
  %8 = icmp sgt i64 %7, 1
  br i1 %8, label %9, label %45

9:                                                ; preds = %6
  %10 = load i64, ptr %3, align 8, !tbaa !5
  %11 = call noundef i64 @_Z5checkx(i64 noundef %10)
  %12 = icmp ne i64 %11, 0
  br i1 %12, label %13, label %14

13:                                               ; preds = %9
  store i64 -1, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %47

14:                                               ; preds = %9
  %15 = load i64, ptr %3, align 8, !tbaa !5
  %16 = srem i64 %15, 2
  %17 = icmp eq i64 %16, 0
  br i1 %17, label %18, label %23

18:                                               ; preds = %14
  %19 = load i64, ptr %4, align 8, !tbaa !5
  %20 = add nsw i64 %19, 1
  store i64 %20, ptr %4, align 8, !tbaa !5
  %21 = load i64, ptr %3, align 8, !tbaa !5
  %22 = sdiv i64 %21, 2
  store i64 %22, ptr %3, align 8, !tbaa !5
  br label %23

23:                                               ; preds = %18, %14
  %24 = load i64, ptr %3, align 8, !tbaa !5
  %25 = srem i64 %24, 3
  %26 = icmp eq i64 %25, 0
  br i1 %26, label %27, label %33

27:                                               ; preds = %23
  %28 = load i64, ptr %4, align 8, !tbaa !5
  %29 = add nsw i64 %28, 1
  store i64 %29, ptr %4, align 8, !tbaa !5
  %30 = load i64, ptr %3, align 8, !tbaa !5
  %31 = mul nsw i64 2, %30
  %32 = sdiv i64 %31, 3
  store i64 %32, ptr %3, align 8, !tbaa !5
  br label %33

33:                                               ; preds = %27, %23
  %34 = load i64, ptr %3, align 8, !tbaa !5
  %35 = srem i64 %34, 5
  %36 = icmp eq i64 %35, 0
  br i1 %36, label %37, label %43

37:                                               ; preds = %33
  %38 = load i64, ptr %4, align 8, !tbaa !5
  %39 = add nsw i64 %38, 1
  store i64 %39, ptr %4, align 8, !tbaa !5
  %40 = load i64, ptr %3, align 8, !tbaa !5
  %41 = mul nsw i64 4, %40
  %42 = sdiv i64 %41, 5
  store i64 %42, ptr %3, align 8, !tbaa !5
  br label %43

43:                                               ; preds = %37, %33
  br label %44

44:                                               ; preds = %43
  br label %6, !llvm.loop !9

45:                                               ; preds = %6
  %46 = load i64, ptr %4, align 8, !tbaa !5
  store i64 %46, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %47

47:                                               ; preds = %45, %13
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  %48 = load i64, ptr %2, align 8
  ret i64 %48
}

; 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 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 #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 = 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"

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_Z5checkx(i64 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i64 @_Z5solvex(i64 noundef %0) local_unnamed_addr #0 {
  %2 = icmp sgt i64 %0, 1
  br i1 %2, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %1, %20
  %.019 = phi i64 [ %.3, %20 ], [ 0, %1 ]
  %.01318 = phi i64 [ %.316, %20 ], [ %0, %1 ]
  %3 = tail call noundef i64 @_Z5checkx(i64 noundef %.01318)
  %.not = icmp eq i64 %3, 0
  br i1 %.not, label %4, label %._crit_edge

4:                                                ; preds = %.lr.ph
  %5 = and i64 %.01318, 1
  %6 = xor i64 %5, 1
  %.114 = lshr i64 %.01318, %6
  %.1 = add i64 %6, %.019
  %7 = urem i64 %.114, 3
  %8 = icmp eq i64 %7, 0
  br i1 %8, label %9, label %13

9:                                                ; preds = %4
  %10 = add nsw i64 %.1, 1
  %11 = shl nuw nsw i64 %.114, 1
  %12 = udiv i64 %11, 3
  br label %13

13:                                               ; preds = %9, %4
  %.215 = phi i64 [ %12, %9 ], [ %.114, %4 ]
  %.2 = phi i64 [ %10, %9 ], [ %.1, %4 ]
  %14 = urem i64 %.215, 5
  %15 = icmp eq i64 %14, 0
  br i1 %15, label %16, label %20

16:                                               ; preds = %13
  %17 = add nsw i64 %.2, 1
  %18 = shl nsw i64 %.215, 2
  %19 = udiv i64 %18, 5
  br label %20

20:                                               ; preds = %13, %16
  %.316 = phi i64 [ %19, %16 ], [ %.215, %13 ]
  %.3 = phi i64 [ %17, %16 ], [ %.2, %13 ]
  %21 = icmp sgt i64 %.316, 1
  br i1 %21, label %.lr.ph, label %._crit_edge, !llvm.loop !5

._crit_edge:                                      ; preds = %.lr.ph, %20, %1
  %.017 = phi i64 [ 0, %1 ], [ %.3, %20 ], [ -1, %.lr.ph ]
  ret i64 %.017
}

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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass