; LLVM IR from schostac/Algorithms-on-Graphs :: week2/acyclicity.ll (Z8isCyclicRSt6vectorI6VertixSaIS0_EE)

; 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 uwtable
declare dso_local noundef zeroext i1 @_Z27isVerticesExploredAcycliclyRSt6vectorI6VertixSaIS0_EEii(ptr noundef nonnull align 8 dereferenceable(24), i32 noundef, i32 noundef) #0

; 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

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext i1 @_Z8isCyclicRSt6vectorI6VertixSaIS0_EE(ptr noundef nonnull align 8 dereferenceable(24) %0) #0 {
  %2 = alloca i1, align 1
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  store i32 0, ptr %4, align 4, !tbaa !9
  br label %6

6:                                                ; preds = %20, %1
  %7 = load i32, ptr %4, align 4, !tbaa !9
  %8 = sext i32 %7 to i64
  %9 = load ptr, ptr %3, align 8, !tbaa !5
  %10 = call noundef i64 @_ZNKSt6vectorI6VertixSaIS0_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %9) #3
  %11 = icmp ult i64 %8, %10
  br i1 %11, label %13, label %12

12:                                               ; preds = %6
  store i32 2, ptr %5, align 4
  br label %23

13:                                               ; preds = %6
  %14 = load ptr, ptr %3, align 8, !tbaa !5
  %15 = load i32, ptr %4, align 4, !tbaa !9
  %16 = load i32, ptr %4, align 4, !tbaa !9
  %17 = call noundef zeroext i1 @_Z27isVerticesExploredAcycliclyRSt6vectorI6VertixSaIS0_EEii(ptr noundef nonnull align 8 dereferenceable(24) %14, i32 noundef %15, i32 noundef %16)
  br i1 %17, label %19, label %18

18:                                               ; preds = %13
  store i1 true, ptr %2, align 1
  store i32 1, ptr %5, align 4
  br label %23

19:                                               ; preds = %13
  br label %20

20:                                               ; preds = %19
  %21 = load i32, ptr %4, align 4, !tbaa !9
  %22 = add nsw i32 %21, 1
  store i32 %22, ptr %4, align 4, !tbaa !9
  br label %6, !llvm.loop !11

23:                                               ; preds = %18, %12
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  %24 = load i32, ptr %5, align 4
  switch i32 %24, label %28 [
    i32 2, label %25
    i32 1, label %26
  ]

25:                                               ; preds = %23
  store i1 false, ptr %2, align 1
  br label %26

26:                                               ; preds = %25, %23
  %27 = load i1, ptr %2, align 1
  ret i1 %27

28:                                               ; preds = %23
  unreachable
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorI6VertixSaIS0_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

attributes #0 = { mustprogress 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 = { 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 #3 = { 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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 uwtable
declare dso_local noundef zeroext i1 @_Z27isVerticesExploredAcycliclyRSt6vectorI6VertixSaIS0_EEii(ptr noundef nonnull align 8 dereferenceable(24), i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext i1 @_Z8isCyclicRSt6vectorI6VertixSaIS0_EE(ptr noundef nonnull align 8 dereferenceable(24) %0) local_unnamed_addr #0 {
  %2 = tail call noundef i64 @_ZNKSt6vectorI6VertixSaIS0_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #2
  %.not9.not = icmp eq i64 %2, 0
  br i1 %.not9.not, label %._crit_edge, label %.lr.ph

3:                                                ; preds = %.lr.ph
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %4 = tail call noundef i64 @_ZNKSt6vectorI6VertixSaIS0_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #2
  %.not = icmp ugt i64 %4, %indvars.iv.next
  br i1 %.not, label %.lr.ph, label %._crit_edge.loopexit, !llvm.loop !5

.lr.ph:                                           ; preds = %1, %3
  %indvars.iv = phi i64 [ %indvars.iv.next, %3 ], [ 0, %1 ]
  %5 = trunc nuw nsw i64 %indvars.iv to i32
  %6 = tail call noundef zeroext i1 @_Z27isVerticesExploredAcycliclyRSt6vectorI6VertixSaIS0_EEii(ptr noundef nonnull align 8 dereferenceable(24) %0, i32 noundef %5, i32 noundef %5)
  br i1 %6, label %3, label %._crit_edge.loopexit

._crit_edge.loopexit:                             ; preds = %.lr.ph, %3
  %.not.lcssa.ph = xor i1 %6, true
  br label %._crit_edge

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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorI6VertixSaIS0_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #1 align 2

attributes #0 = { mustprogress 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 = { 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 #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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass