; LLVM IR from DionysiosB/CodeForces :: 0500-0599/568A-PrimesOrPalindromes.ll (Z12isPalindromel)

; 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"

%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" = type { ptr, ptr, ptr }

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext i1 @_Z12isPalindromel(i64 noundef %0) #0 personality ptr @__gxx_personality_v0 {
  %2 = alloca i1, align 1
  %3 = alloca i64, align 8
  %4 = alloca %"class.std::vector", align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  store i64 %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 24, ptr %4) #3
  call void @_ZNSt6vectorIiSaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24) %4) #3
  %11 = load i64, ptr %3, align 8, !tbaa !5
  %12 = icmp sle i64 %11, 0
  br i1 %12, label %13, label %14

13:                                               ; preds = %1
  store i1 false, ptr %2, align 1
  store i32 1, ptr %5, align 4
  br label %60

14:                                               ; preds = %1
  br label %15

15:                                               ; preds = %22, %14
  %16 = load i64, ptr %3, align 8, !tbaa !5
  %17 = icmp sgt i64 %16, 0
  br i1 %17, label %18, label %29

18:                                               ; preds = %15
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  %19 = load i64, ptr %3, align 8, !tbaa !5
  %20 = srem i64 %19, 10
  %21 = trunc i64 %20 to i32
  store i32 %21, ptr %6, align 4, !tbaa !9
  invoke void @_ZNSt6vectorIiSaIiEE9push_backEOi(ptr noundef nonnull align 8 dereferenceable(24) %4, ptr noundef nonnull align 4 dereferenceable(4) %6)
          to label %22 unwind label %25

22:                                               ; preds = %18
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  %23 = load i64, ptr %3, align 8, !tbaa !5
  %24 = sdiv i64 %23, 10
  store i64 %24, ptr %3, align 8, !tbaa !5
  br label %15, !llvm.loop !11

25:                                               ; preds = %18
  %26 = landingpad { ptr, i32 }
          cleanup
  %27 = extractvalue { ptr, i32 } %26, 0
  store ptr %27, ptr %7, align 8
  %28 = extractvalue { ptr, i32 } %26, 1
  store i32 %28, ptr %8, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %4) #3
  call void @llvm.lifetime.end.p0(i64 24, ptr %4) #3
  br label %62

29:                                               ; preds = %15
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  %30 = call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %4) #3
  %31 = trunc i64 %30 to i32
  store i32 %31, ptr %9, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #3
  store i32 0, ptr %10, align 4, !tbaa !9
  br label %32

32:                                               ; preds = %53, %29
  %33 = load i32, ptr %10, align 4, !tbaa !9
  %34 = load i32, ptr %9, align 4, !tbaa !9
  %35 = sdiv i32 %34, 2
  %36 = icmp sle i32 %33, %35
  br i1 %36, label %38, label %37

37:                                               ; preds = %32
  store i32 4, ptr %5, align 4
  br label %56

38:                                               ; preds = %32
  %39 = load i32, ptr %10, align 4, !tbaa !9
  %40 = sext i32 %39 to i64
  %41 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %4, i64 noundef %40) #3
  %42 = load i32, ptr %41, align 4, !tbaa !9
  %43 = load i32, ptr %9, align 4, !tbaa !9
  %44 = sub nsw i32 %43, 1
  %45 = load i32, ptr %10, align 4, !tbaa !9
  %46 = sub nsw i32 %44, %45
  %47 = sext i32 %46 to i64
  %48 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %4, i64 noundef %47) #3
  %49 = load i32, ptr %48, align 4, !tbaa !9
  %50 = icmp ne i32 %42, %49
  br i1 %50, label %51, label %52

51:                                               ; preds = %38
  store i1 false, ptr %2, align 1
  store i32 1, ptr %5, align 4
  br label %56

52:                                               ; preds = %38
  br label %53

53:                                               ; preds = %52
  %54 = load i32, ptr %10, align 4, !tbaa !9
  %55 = add nsw i32 %54, 1
  store i32 %55, ptr %10, align 4, !tbaa !9
  br label %32, !llvm.loop !13

56:                                               ; preds = %51, %37
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #3
  %57 = load i32, ptr %5, align 4
  switch i32 %57, label %59 [
    i32 4, label %58
  ]

58:                                               ; preds = %56
  store i1 true, ptr %2, align 1
  store i32 1, ptr %5, align 4
  br label %59

59:                                               ; preds = %58, %56
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  br label %60

60:                                               ; preds = %59, %13
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %4) #3
  call void @llvm.lifetime.end.p0(i64 24, ptr %4) #3
  %61 = load i1, ptr %2, align 1
  ret i1 %61

62:                                               ; preds = %25
  %63 = load ptr, ptr %7, align 8
  %64 = load i32, ptr %8, align 4
  %65 = insertvalue { ptr, i32 } poison, ptr %63, 0
  %66 = insertvalue { ptr, i32 } %65, i32 %64, 1
  resume { ptr, i32 } %66
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEE9push_backEOi(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 4 dereferenceable(4)) #0 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #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 = !{!"long", !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"}
!13 = distinct !{!13, !12}


; 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"

%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" = type { ptr, ptr, ptr }

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext i1 @_Z12isPalindromel(i64 noundef %0) local_unnamed_addr #0 personality ptr @__gxx_personality_v0 {
  %2 = alloca %"class.std::vector", align 8
  %3 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %2) #3
  call void @_ZNSt6vectorIiSaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24) %2) #3
  %4 = icmp slt i64 %0, 1
  br i1 %4, label %.critedge, label %.preheader

.preheader:                                       ; preds = %1, %8
  %.01419 = phi i64 [ %6, %8 ], [ %0, %1 ]
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #3
  %5 = urem i64 %.01419, 10
  %6 = udiv i64 %.01419, 10
  %7 = trunc nuw nsw i64 %5 to i32
  store i32 %7, ptr %3, align 4, !tbaa !5
  invoke void @_ZNSt6vectorIiSaIiEE9push_backEOi(ptr noundef nonnull align 8 dereferenceable(24) %2, ptr noundef nonnull align 4 dereferenceable(4) %3)
          to label %8 unwind label %9

8:                                                ; preds = %.preheader
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #3
  %.not = icmp ult i64 %.01419, 10
  br i1 %.not, label %11, label %.preheader, !llvm.loop !9

9:                                                ; preds = %.preheader
  %10 = landingpad { ptr, i32 }
          cleanup
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #3
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %2) #3
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %2) #3
  resume { ptr, i32 } %10

11:                                               ; preds = %8
  %12 = call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %2) #3
  %13 = trunc i64 %12 to i32
  %.not1720 = icmp slt i32 %13, -1
  br i1 %.not1720, label %.critedge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %11
  %14 = sdiv i32 %13, 2
  %15 = add nuw nsw i32 %14, 1
  %wide.trip.count = zext nneg i32 %15 to i64
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph, %.lr.ph.preheader
  %indvars.iv = phi i64 [ 0, %.lr.ph.preheader ], [ %indvars.iv.next, %.lr.ph ]
  %16 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %2, i64 noundef %indvars.iv) #3
  %17 = load i32, ptr %16, align 4, !tbaa !5
  %18 = xor i64 %indvars.iv, -1
  %19 = add i64 %12, %18
  %sext = shl i64 %19, 32
  %20 = ashr exact i64 %sext, 32
  %21 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %2, i64 noundef %20) #3
  %22 = load i32, ptr %21, align 4, !tbaa !5
  %.not18 = icmp eq i32 %17, %22
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp ne i64 %indvars.iv.next, %wide.trip.count
  %or.cond.not = select i1 %.not18, i1 %exitcond.not, i1 false
  br i1 %or.cond.not, label %.lr.ph, label %.critedge, !llvm.loop !11

.critedge:                                        ; preds = %.lr.ph, %11, %1
  %.2 = phi i1 [ false, %1 ], [ true, %11 ], [ %.not18, %.lr.ph ]
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %2) #3
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %2) #3
  ret i1 %.2
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEE9push_backEOi(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #0 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #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 = { mustprogress 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}


; Effective O3 passes: CorrelatedValuePropagationPass,DivRemPairsPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass