; LLVM IR from MinaFaried3/Assiut-University-Training---Newcomers :: c-sheet2_Loops/M-LuckyNumbers1.ll (Z4lucki)

; 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 @_Z4lucki(i32 noundef %0) #0 {
  %2 = alloca i32, align 4
  %3 = alloca i8, align 1
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 1, ptr %3) #2
  br label %7

7:                                                ; preds = %33, %1
  %8 = load i32, ptr %2, align 4, !tbaa !5
  %9 = icmp ne i32 %8, 0
  br i1 %9, label %10, label %34

10:                                               ; preds = %7
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  %11 = load i32, ptr %2, align 4, !tbaa !5
  %12 = srem i32 %11, 10
  store i32 %12, ptr %4, align 4, !tbaa !5
  %13 = load i32, ptr %4, align 4, !tbaa !5
  %14 = icmp eq i32 %13, 4
  br i1 %14, label %18, label %15

15:                                               ; preds = %10
  %16 = load i32, ptr %4, align 4, !tbaa !5
  %17 = icmp eq i32 %16, 7
  br i1 %17, label %18, label %19

18:                                               ; preds = %15, %10
  store i8 1, ptr %3, align 1, !tbaa !9
  br label %20

19:                                               ; preds = %15
  store i8 0, ptr %3, align 1, !tbaa !9
  store i32 3, ptr %5, align 4
  br label %31

20:                                               ; preds = %18
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  %21 = load i32, ptr %2, align 4, !tbaa !5
  %22 = load i32, ptr %4, align 4, !tbaa !5
  %23 = sub nsw i32 %21, %22
  %24 = sdiv i32 %23, 10
  store i32 %24, ptr %6, align 4, !tbaa !5
  %25 = load i32, ptr %6, align 4, !tbaa !5
  %26 = icmp eq i32 %25, 0
  br i1 %26, label %27, label %28

27:                                               ; preds = %20
  store i32 3, ptr %5, align 4
  br label %30

28:                                               ; preds = %20
  %29 = load i32, ptr %6, align 4, !tbaa !5
  store i32 %29, ptr %2, align 4, !tbaa !5
  store i32 0, ptr %5, align 4
  br label %30

30:                                               ; preds = %28, %27
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  br label %31

31:                                               ; preds = %30, %19
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  %32 = load i32, ptr %5, align 4
  switch i32 %32, label %37 [
    i32 0, label %33
    i32 3, label %34
  ]

33:                                               ; preds = %31
  br label %7, !llvm.loop !11

34:                                               ; preds = %31, %7
  %35 = load i8, ptr %3, align 1, !tbaa !9, !range !13, !noundef !14
  %36 = trunc i8 %35 to i1
  store i32 1, ptr %5, align 4
  call void @llvm.lifetime.end.p0(i64 1, ptr %3) #2
  ret i1 %36

37:                                               ; preds = %31
  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 = !{!10, !10, i64 0}
!10 = !{!"bool", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = !{i8 0, i8 2}
!14 = !{}


; 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 @_Z4lucki(i32 noundef %0) local_unnamed_addr #0 {
  br label %2

2:                                                ; preds = %6, %1
  %.0 = phi i32 [ %0, %1 ], [ %5, %6 ]
  %.not = icmp eq i32 %.0, 0
  br i1 %.not, label %.thread, label %3

3:                                                ; preds = %2
  %4 = srem i32 %.0, 10
  %5 = sdiv i32 %.0, 10
  switch i32 %4, label %.thread [
    i32 7, label %6
    i32 4, label %6
  ]

6:                                                ; preds = %3, %3
  %.0.off = add i32 %.0, 9
  %7 = icmp ult i32 %.0.off, 19
  br i1 %7, label %.thread, label %2

.thread:                                          ; preds = %6, %3, %2
  %.215 = phi i1 [ true, %2 ], [ false, %3 ], [ true, %6 ]
  ret i1 %.215
}

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: CorrelatedValuePropagationPass,DivRemPairsPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass