; LLVM IR from TheAlgorithms/C-Plus-Plus :: backtracking (magic_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: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_ZN12backtracking14magic_sequence8is_magicERKSt6vectorIjSaIjEE(ptr noundef nonnull align 8 dereferenceable(24)) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIjSaIjEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_ZN12backtracking14magic_sequence9filteringERKSt6vectorIjSaIjEEj(ptr noundef nonnull align 8 dereferenceable(24), i32 noundef) #1

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN12backtracking14magic_sequence5solveEPSt6vectorIjSaIjEEPNSt7__cxx114listIS3_SaIS3_EEEj(ptr noundef %0, ptr noundef %1, i32 noundef %2) #1 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  store i32 %2, ptr %6, align 4, !tbaa !9
  %8 = load i32, ptr %6, align 4, !tbaa !9
  %9 = zext i32 %8 to i64
  %10 = load ptr, ptr %4, align 8, !tbaa !5
  %11 = call noundef i64 @_ZNKSt6vectorIjSaIjEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %10) #3
  %12 = icmp eq i64 %9, %11
  br i1 %12, label %13, label %20

13:                                               ; preds = %3
  %14 = load ptr, ptr %4, align 8, !tbaa !5
  %15 = call noundef zeroext i1 @_ZN12backtracking14magic_sequence8is_magicERKSt6vectorIjSaIjEE(ptr noundef nonnull align 8 dereferenceable(24) %14)
  br i1 %15, label %16, label %19

16:                                               ; preds = %13
  %17 = load ptr, ptr %5, align 8, !tbaa !5
  %18 = load ptr, ptr %4, align 8, !tbaa !5
  call void @_ZNSt7__cxx114listISt6vectorIjSaIjEESaIS3_EE9push_backERKS3_(ptr noundef nonnull align 8 dereferenceable(24) %17, ptr noundef nonnull align 8 dereferenceable(24) %18)
  br label %19

19:                                               ; preds = %16, %13
  br label %48

20:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  store i32 0, ptr %7, align 4, !tbaa !9
  br label %21

21:                                               ; preds = %44, %20
  %22 = load i32, ptr %7, align 4, !tbaa !9
  %23 = zext i32 %22 to i64
  %24 = load ptr, ptr %4, align 8, !tbaa !5
  %25 = call noundef i64 @_ZNKSt6vectorIjSaIjEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %24) #3
  %26 = icmp ult i64 %23, %25
  br i1 %26, label %28, label %27

27:                                               ; preds = %21
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  br label %47

28:                                               ; preds = %21
  %29 = load i32, ptr %7, align 4, !tbaa !9
  %30 = load ptr, ptr %4, align 8, !tbaa !5
  %31 = load i32, ptr %6, align 4, !tbaa !9
  %32 = zext i32 %31 to i64
  %33 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIjSaIjEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %30, i64 noundef %32) #3
  store i32 %29, ptr %33, align 4, !tbaa !9
  %34 = load ptr, ptr %4, align 8, !tbaa !5
  %35 = load i32, ptr %6, align 4, !tbaa !9
  %36 = add i32 %35, 1
  %37 = call noundef zeroext i1 @_ZN12backtracking14magic_sequence9filteringERKSt6vectorIjSaIjEEj(ptr noundef nonnull align 8 dereferenceable(24) %34, i32 noundef %36)
  br i1 %37, label %38, label %43

38:                                               ; preds = %28
  %39 = load ptr, ptr %4, align 8, !tbaa !5
  %40 = load ptr, ptr %5, align 8, !tbaa !5
  %41 = load i32, ptr %6, align 4, !tbaa !9
  %42 = add i32 %41, 1
  call void @_ZN12backtracking14magic_sequence5solveEPSt6vectorIjSaIjEEPNSt7__cxx114listIS3_SaIS3_EEEj(ptr noundef %39, ptr noundef %40, i32 noundef %42)
  br label %43

43:                                               ; preds = %38, %28
  br label %44

44:                                               ; preds = %43
  %45 = load i32, ptr %7, align 4, !tbaa !9
  %46 = add i32 %45, 1
  store i32 %46, ptr %7, align 4, !tbaa !9
  br label %21, !llvm.loop !11

47:                                               ; preds = %27
  br label %48

48:                                               ; preds = %47, %19
  ret void
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt7__cxx114listISt6vectorIjSaIjEESaIS3_EE9push_backERKS3_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(24)) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIjSaIjEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #2 align 2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 @_ZN12backtracking14magic_sequence8is_magicERKSt6vectorIjSaIjEE(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIjSaIjEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_ZN12backtracking14magic_sequence9filteringERKSt6vectorIjSaIjEEj(ptr noundef nonnull align 8 dereferenceable(24), i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN12backtracking14magic_sequence5solveEPSt6vectorIjSaIjEEPNSt7__cxx114listIS3_SaIS3_EEEj(ptr noundef nonnull %0, ptr noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = zext i32 %2 to i64
  %5 = tail call noundef i64 @_ZNKSt6vectorIjSaIjEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #2
  %6 = icmp eq i64 %5, %4
  br i1 %6, label %9, label %.preheader

.preheader:                                       ; preds = %3
  %7 = tail call noundef i64 @_ZNKSt6vectorIjSaIjEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #2
  %.not = icmp eq i64 %7, 0
  br i1 %.not, label %.loopexit, label %.lr.ph

.lr.ph:                                           ; preds = %.preheader
  %8 = add i32 %2, 1
  br label %12

9:                                                ; preds = %3
  %10 = tail call noundef zeroext i1 @_ZN12backtracking14magic_sequence8is_magicERKSt6vectorIjSaIjEE(ptr noundef nonnull align 8 dereferenceable(24) %0)
  br i1 %10, label %11, label %.loopexit

11:                                               ; preds = %9
  tail call void @_ZNSt7__cxx114listISt6vectorIjSaIjEESaIS3_EE9push_backERKS3_(ptr noundef nonnull align 8 dereferenceable(24) %1, ptr noundef nonnull align 8 dereferenceable(24) %0)
  br label %.loopexit

12:                                               ; preds = %.lr.ph, %16
  %.016 = phi i32 [ 0, %.lr.ph ], [ %17, %16 ]
  %13 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIjSaIjEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %4) #2
  store i32 %.016, ptr %13, align 4, !tbaa !5
  %14 = tail call noundef zeroext i1 @_ZN12backtracking14magic_sequence9filteringERKSt6vectorIjSaIjEEj(ptr noundef nonnull align 8 dereferenceable(24) %0, i32 noundef %8)
  br i1 %14, label %15, label %16

15:                                               ; preds = %12
  tail call void @_ZN12backtracking14magic_sequence5solveEPSt6vectorIjSaIjEEPNSt7__cxx114listIS3_SaIS3_EEEj(ptr noundef nonnull %0, ptr noundef %1, i32 noundef %8)
  br label %16

16:                                               ; preds = %12, %15
  %17 = add i32 %.016, 1
  %18 = zext i32 %17 to i64
  %19 = tail call noundef i64 @_ZNKSt6vectorIjSaIjEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #2
  %20 = icmp ugt i64 %19, %18
  br i1 %20, label %12, label %.loopexit, !llvm.loop !9

.loopexit:                                        ; preds = %16, %.preheader, %9, %11
  ret void
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt7__cxx114listISt6vectorIjSaIjEESaIS3_EE9push_backERKS3_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIjSaIjEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) 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 = !{!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"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass