; LLVM IR from xirc/cp-algorithm :: codeforces/1443/1443A/main.ll (Z5solvei)

; 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 }
%"class.__gnu_cxx::__normal_iterator" = type { ptr }
%class.anon = type { ptr }

; Function Attrs: mustprogress uwtable
define dso_local void @_Z5solvei(ptr dead_on_unwind noalias writable sret(%"class.std::vector") align 8 %0, i32 noundef %1) #0 personality ptr @__gxx_personality_v0 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i1, align 1
  %7 = alloca i32, align 4
  %8 = alloca i8, align 1
  %9 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %10 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %11 = alloca %class.anon, align 8
  %12 = alloca ptr, align 8
  %13 = alloca i32, align 4
  store ptr %0, ptr %3, align 8
  store i32 %1, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #4
  %14 = load i32, ptr %4, align 4, !tbaa !5
  %15 = mul nsw i32 %14, 4
  store i32 %15, ptr %5, align 4, !tbaa !5
  store i1 false, ptr %6, align 1
  call void @_ZNSt6vectorIiSaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #4
  %16 = load i32, ptr %5, align 4, !tbaa !5
  store i32 %16, ptr %7, align 4, !tbaa !5
  br label %17

17:                                               ; preds = %52, %2
  %18 = load i32, ptr %7, align 4, !tbaa !5
  %19 = icmp sgt i32 %18, 0
  br i1 %19, label %20, label %25

20:                                               ; preds = %17
  %21 = call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #4
  %22 = load i32, ptr %4, align 4, !tbaa !5
  %23 = sext i32 %22 to i64
  %24 = icmp ult i64 %21, %23
  br label %25

25:                                               ; preds = %20, %17
  %26 = phi i1 [ false, %17 ], [ %24, %20 ]
  br i1 %26, label %28, label %27

27:                                               ; preds = %25
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #4
  br label %55

28:                                               ; preds = %25
  call void @llvm.lifetime.start.p0(i64 1, ptr %8) #4
  %29 = call ptr @_ZNSt6vectorIiSaIiEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #4
  %30 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %9, i32 0, i32 0
  store ptr %29, ptr %30, align 8
  %31 = call ptr @_ZNSt6vectorIiSaIiEE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #4
  %32 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %10, i32 0, i32 0
  store ptr %31, ptr %32, align 8
  %33 = getelementptr inbounds %class.anon, ptr %11, i32 0, i32 0
  store ptr %7, ptr %33, align 8, !tbaa !9
  %34 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %9, i32 0, i32 0
  %35 = load ptr, ptr %34, align 8
  %36 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %10, i32 0, i32 0
  %37 = load ptr, ptr %36, align 8
  %38 = getelementptr inbounds %class.anon, ptr %11, i32 0, i32 0
  %39 = load ptr, ptr %38, align 8
  %40 = invoke noundef zeroext i1 @"_ZSt6any_ofIN9__gnu_cxx17__normal_iteratorIPiSt6vectorIiSaIiEEEEZ5solveiE3$_0EbT_S8_T0_"(ptr %35, ptr %37, ptr %39)
          to label %41 unwind label %47

41:                                               ; preds = %28
  %42 = zext i1 %40 to i8
  store i8 %42, ptr %8, align 1, !tbaa !11
  %43 = load i8, ptr %8, align 1, !tbaa !11, !range !13, !noundef !14
  %44 = trunc i8 %43 to i1
  br i1 %44, label %51, label %45

45:                                               ; preds = %41
  invoke void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef nonnull align 4 dereferenceable(4) %7)
          to label %46 unwind label %47

46:                                               ; preds = %45
  br label %51

47:                                               ; preds = %45, %28
  %48 = landingpad { ptr, i32 }
          cleanup
  %49 = extractvalue { ptr, i32 } %48, 0
  store ptr %49, ptr %12, align 8
  %50 = extractvalue { ptr, i32 } %48, 1
  store i32 %50, ptr %13, align 4
  call void @llvm.lifetime.end.p0(i64 1, ptr %8) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #4
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #4
  br label %59

51:                                               ; preds = %46, %41
  call void @llvm.lifetime.end.p0(i64 1, ptr %8) #4
  br label %52

52:                                               ; preds = %51
  %53 = load i32, ptr %7, align 4, !tbaa !5
  %54 = sub nsw i32 %53, 2
  store i32 %54, ptr %7, align 4, !tbaa !5
  br label %17, !llvm.loop !15

55:                                               ; preds = %27
  store i1 true, ptr %6, align 1
  %56 = load i1, ptr %6, align 1
  br i1 %56, label %58, label %57

57:                                               ; preds = %55
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #4
  br label %58

58:                                               ; preds = %57, %55
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #4
  ret void

59:                                               ; preds = %47
  %60 = load ptr, ptr %12, align 8
  %61 = load i32, ptr %13, align 4
  %62 = insertvalue { ptr, i32 } poison, ptr %60, 0
  %63 = insertvalue { ptr, i32 } %62, i32 %61, 1
  resume { ptr, i32 } %63
}

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

; Function Attrs: inlinehint mustprogress uwtable
declare hidden noundef zeroext i1 @"_ZSt6any_ofIN9__gnu_cxx17__normal_iteratorIPiSt6vectorIiSaIiEEEEZ5solveiE3$_0EbT_S8_T0_"(ptr, ptr, ptr) #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIiSaIiEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIiSaIiEE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 4 dereferenceable(4)) #0 align 2

; 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 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 = { inlinehint 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 #4 = { 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 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"bool", !7, i64 0}
!13 = !{i8 0, i8 2}
!14 = !{}
!15 = distinct !{!15, !16}
!16 = !{!"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"

%"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 void @_Z5solvei(ptr dead_on_unwind noalias nonnull writable sret(%"class.std::vector") align 8 %0, i32 noundef %1) local_unnamed_addr #0 personality ptr @__gxx_personality_v0 {
  %3 = alloca i32, align 4
  %4 = shl nsw i32 %1, 2
  tail call void @_ZNSt6vectorIiSaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #4
  store i32 %4, ptr %3, align 4, !tbaa !5
  %5 = icmp sgt i32 %1, 0
  br i1 %5, label %.lr.ph, label %.critedge

.lr.ph:                                           ; preds = %2
  %6 = zext nneg i32 %1 to i64
  br label %7

7:                                                ; preds = %.lr.ph, %18
  %8 = call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #4
  %9 = icmp ult i64 %8, %6
  br i1 %9, label %10, label %.critedge

.critedge:                                        ; preds = %7, %18, %2
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #4
  ret void

10:                                               ; preds = %7
  %11 = call ptr @_ZNSt6vectorIiSaIiEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #4
  %12 = call ptr @_ZNSt6vectorIiSaIiEE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #4
  %13 = invoke noundef zeroext i1 @"_ZSt6any_ofIN9__gnu_cxx17__normal_iteratorIPiSt6vectorIiSaIiEEEEZ5solveiE3$_0EbT_S8_T0_"(ptr %11, ptr %12, ptr nonnull %3)
          to label %14 unwind label %16

14:                                               ; preds = %10
  br i1 %13, label %18, label %15

15:                                               ; preds = %14
  invoke void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef nonnull align 4 dereferenceable(4) %3)
          to label %18 unwind label %16

16:                                               ; preds = %15, %10
  %17 = landingpad { ptr, i32 }
          cleanup
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #4
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #4
  resume { ptr, i32 } %17

18:                                               ; preds = %15, %14
  %19 = load i32, ptr %3, align 4, !tbaa !5
  %20 = add nsw i32 %19, -2
  store i32 %20, ptr %3, align 4, !tbaa !5
  %21 = icmp sgt i32 %19, 2
  br i1 %21, label %7, label %.critedge, !llvm.loop !9
}

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

; Function Attrs: inlinehint mustprogress uwtable
declare hidden noundef zeroext i1 @"_ZSt6any_ofIN9__gnu_cxx17__normal_iteratorIPiSt6vectorIiSaIiEEEEZ5solveiE3$_0EbT_S8_T0_"(ptr, ptr, ptr) local_unnamed_addr #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIiSaIiEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIiSaIiEE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #2 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #0 align 2

; 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 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 = { inlinehint 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 #4 = { 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,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass