; LLVM IR from Mohammed-Shoaib/Coding-Problems :: AtCoder/Solutions/abc174_c.ll (Z7repsepti)

; 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 i32 @_Z7repsepti(i32 noundef %0) #0 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 0, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  store i32 1, ptr %5, align 4, !tbaa !5
  br label %7

7:                                                ; preds = %23, %1
  %8 = load i32, ptr %5, align 4, !tbaa !5
  %9 = load i32, ptr %3, align 4, !tbaa !5
  %10 = icmp sle i32 %8, %9
  br i1 %10, label %12, label %11

11:                                               ; preds = %7
  store i32 2, ptr %6, align 4
  br label %26

12:                                               ; preds = %7
  %13 = load i32, ptr %4, align 4, !tbaa !5
  %14 = mul nsw i32 10, %13
  %15 = add nsw i32 %14, 7
  %16 = load i32, ptr %3, align 4, !tbaa !5
  %17 = srem i32 %15, %16
  store i32 %17, ptr %4, align 4, !tbaa !5
  %18 = load i32, ptr %4, align 4, !tbaa !5
  %19 = icmp eq i32 %18, 0
  br i1 %19, label %20, label %22

20:                                               ; preds = %12
  %21 = load i32, ptr %5, align 4, !tbaa !5
  store i32 %21, ptr %2, align 4
  store i32 1, ptr %6, align 4
  br label %26

22:                                               ; preds = %12
  br label %23

23:                                               ; preds = %22
  %24 = load i32, ptr %5, align 4, !tbaa !5
  %25 = add nsw i32 %24, 1
  store i32 %25, ptr %5, align 4, !tbaa !5
  br label %7, !llvm.loop !9

26:                                               ; preds = %20, %11
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  %27 = load i32, ptr %6, align 4
  switch i32 %27, label %29 [
    i32 2, label %28
  ]

28:                                               ; preds = %26
  store i32 -1, ptr %2, align 4
  store i32 1, ptr %6, align 4
  br label %29

29:                                               ; preds = %28, %26
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  %30 = load i32, ptr %2, align 4
  ret i32 %30
}

; 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 i32 @_Z7repsepti(i32 noundef %0) local_unnamed_addr #0 {
  %.not14 = icmp slt i32 %0, 1
  br i1 %.not14, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %1, %6
  %.0916 = phi i32 [ %7, %6 ], [ 1, %1 ]
  %.01015 = phi i32 [ %4, %6 ], [ 0, %1 ]
  %2 = mul nsw i32 %.01015, 10
  %3 = add nsw i32 %2, 7
  %4 = srem i32 %3, %0
  %5 = icmp eq i32 %4, 0
  br i1 %5, label %._crit_edge, label %6

6:                                                ; preds = %.lr.ph
  %7 = add nuw i32 %.0916, 1
  %exitcond.not = icmp eq i32 %.0916, %0
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !5

._crit_edge:                                      ; preds = %6, %.lr.ph, %1
  %spec.select = phi i32 [ -1, %1 ], [ %.0916, %.lr.ph ], [ -1, %6 ]
  ret i32 %spec.select
}

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: GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass