; LLVM IR from brpapa/algorithms :: solutions/codeforces/110-A.ll (Z19isNearlyLuckyNumberi)

; 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
define dso_local noundef zeroext i1 @_Z19isNearlyLuckyNumberi(i32 noundef %0) #0 {
  %2 = alloca i1, align 1
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  %6 = load i32, ptr %3, align 4, !tbaa !5
  %7 = icmp eq i32 %6, 0
  br i1 %7, label %8, label %9

8:                                                ; preds = %1
  store i1 false, ptr %2, align 1
  br label %29

9:                                                ; preds = %1
  br label %10

10:                                               ; preds = %27, %9
  %11 = load i32, ptr %3, align 4, !tbaa !5
  %12 = icmp sgt i32 %11, 0
  br i1 %12, label %13, label %28

13:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  %14 = load i32, ptr %3, align 4, !tbaa !5
  %15 = srem i32 %14, 10
  store i32 %15, ptr %4, align 4, !tbaa !5
  %16 = load i32, ptr %4, align 4, !tbaa !5
  %17 = icmp ne i32 %16, 4
  br i1 %17, label %18, label %22

18:                                               ; preds = %13
  %19 = load i32, ptr %4, align 4, !tbaa !5
  %20 = icmp ne i32 %19, 7
  br i1 %20, label %21, label %22

21:                                               ; preds = %18
  store i1 false, ptr %2, align 1
  store i32 1, ptr %5, align 4
  br label %25

22:                                               ; preds = %18, %13
  %23 = load i32, ptr %3, align 4, !tbaa !5
  %24 = sdiv i32 %23, 10
  store i32 %24, ptr %3, align 4, !tbaa !5
  store i32 0, ptr %5, align 4
  br label %25

25:                                               ; preds = %22, %21
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  %26 = load i32, ptr %5, align 4
  switch i32 %26, label %31 [
    i32 0, label %27
    i32 1, label %29
  ]

27:                                               ; preds = %25
  br label %10, !llvm.loop !9

28:                                               ; preds = %10
  store i1 true, ptr %2, align 1
  br label %29

29:                                               ; preds = %28, %25, %8
  %30 = load i1, ptr %2, align 1
  ret i1 %30

31:                                               ; preds = %25
  unreachable
}

; 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 = !{!"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"

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none) uwtable
define dso_local noundef zeroext i1 @_Z19isNearlyLuckyNumberi(i32 noundef %0) local_unnamed_addr #0 {
  %2 = icmp eq i32 %0, 0
  br i1 %2, label %.loopexit, label %.preheader

.preheader:                                       ; preds = %1
  %3 = icmp sgt i32 %0, 0
  br i1 %3, label %.lr.ph, label %.loopexit

.lr.ph:                                           ; preds = %.preheader, %.backedge
  %.0913 = phi i32 [ %.110, %.backedge ], [ %0, %.preheader ]
  %4 = urem i32 %.0913, 10
  %5 = udiv i32 %.0913, 10
  switch i32 %4, label %7 [
    i32 7, label %6
    i32 4, label %6
  ]

6:                                                ; preds = %.lr.ph, %.lr.ph
  br label %7

7:                                                ; preds = %.lr.ph, %6
  %.110 = phi i32 [ %5, %6 ], [ %.0913, %.lr.ph ]
  switch i32 %4, label %.loopexit [
    i32 7, label %.backedge
    i32 4, label %.backedge
  ]

.backedge:                                        ; preds = %7, %7
  %8 = icmp sgt i32 %.110, 0
  br i1 %8, label %.lr.ph, label %.loopexit

.loopexit:                                        ; preds = %.backedge, %7, %.preheader, %1
  %.2 = phi i1 [ false, %1 ], [ true, %.preheader ], [ true, %.backedge ], [ false, %7 ]
  ret i1 %.2
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(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)"}


; Effective O3 passes: DivRemPairsPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass