; LLVM IR from edualgo/dsa-code-store :: Dynamic-Programming/Dynamic-Programming-master/Recursion (create_sequence)

; 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 @_Z12check_digitsi(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
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  %6 = load i32, ptr %3, align 4, !tbaa !5
  store i32 %6, ptr %4, align 4, !tbaa !5
  br label %7

7:                                                ; preds = %22, %1
  %8 = load i32, ptr %4, align 4, !tbaa !5
  %9 = icmp ne i32 %8, 0
  br i1 %9, label %10, label %23

10:                                               ; preds = %7
  %11 = load i32, ptr %4, align 4, !tbaa !5
  %12 = srem i32 %11, 10
  %13 = icmp eq i32 %12, 2
  br i1 %13, label %18, label %14

14:                                               ; preds = %10
  %15 = load i32, ptr %4, align 4, !tbaa !5
  %16 = srem i32 %15, 10
  %17 = icmp eq i32 %16, 5
  br i1 %17, label %18, label %21

18:                                               ; preds = %14, %10
  %19 = load i32, ptr %4, align 4, !tbaa !5
  %20 = sdiv i32 %19, 10
  store i32 %20, ptr %4, align 4, !tbaa !5
  br label %22

21:                                               ; preds = %14
  store i1 false, ptr %2, align 1
  store i32 1, ptr %5, align 4
  br label %24

22:                                               ; preds = %18
  br label %7, !llvm.loop !9

23:                                               ; preds = %7
  store i1 true, ptr %2, align 1
  store i32 1, ptr %5, align 4
  br label %24

24:                                               ; preds = %23, %21
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  %25 = load i1, ptr %2, align 1
  ret i1 %25
}

; 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 @_Z12check_digitsi(i32 noundef %0) local_unnamed_addr #0 {
  %.not7 = icmp eq i32 %0, 0
  br i1 %.not7, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %1, %4
  %.08 = phi i32 [ %3, %4 ], [ %0, %1 ]
  %2 = srem i32 %.08, 10
  %3 = sdiv i32 %.08, 10
  switch i32 %2, label %._crit_edge [
    i32 2, label %4
    i32 5, label %4
  ]

4:                                                ; preds = %.lr.ph, %.lr.ph
  %.08.off = add i32 %.08, 9
  %.not = icmp ult i32 %.08.off, 19
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !5

._crit_edge:                                      ; preds = %.lr.ph, %4, %1
  %.not.lcssa = phi i1 [ true, %1 ], [ true, %4 ], [ false, %.lr.ph ]
  ret i1 %.not.lcssa
}

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


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