; LLVM IR from kazunetakahashi/atcoder :: 2020/0222_ABC156/past/D.ll (Z4combxx)

; 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.Combination = type { %"class.std::vector", %"class.std::vector", %"class.std::vector" }
%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<Mint<>, std::allocator<Mint<>>>::_Vector_impl" }
%"struct.std::_Vector_base<Mint<>, std::allocator<Mint<>>>::_Vector_impl" = type { %"struct.std::_Vector_base<Mint<>, std::allocator<Mint<>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<Mint<>, std::allocator<Mint<>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%class.Mint = type { i64 }

@C = external dso_local global %class.Combination, align 8

; Function Attrs: mustprogress uwtable
define dso_local i64 @_Z4combxx(i64 noundef %0, i64 noundef %1) #0 {
  %3 = alloca %class.Mint, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca %class.Mint, align 8
  %7 = alloca i64, align 8
  %8 = alloca %class.Mint, align 8
  store i64 %0, ptr %4, align 8, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  call void @_ZN4MintILx1000000007EEC2Ex(ptr noundef nonnull align 8 dereferenceable(8) %6, i64 noundef 1)
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %9 = load i64, ptr %4, align 8, !tbaa !5
  store i64 %9, ptr %7, align 8, !tbaa !5
  br label %10

10:                                               ; preds = %21, %2
  %11 = load i64, ptr %7, align 8, !tbaa !5
  %12 = load i64, ptr %4, align 8, !tbaa !5
  %13 = load i64, ptr %5, align 8, !tbaa !5
  %14 = sub nsw i64 %12, %13
  %15 = add nsw i64 %14, 1
  %16 = icmp sge i64 %11, %15
  br i1 %16, label %18, label %17

17:                                               ; preds = %10
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  br label %24

18:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %19 = load i64, ptr %7, align 8, !tbaa !5
  call void @_ZN4MintILx1000000007EEC2Ex(ptr noundef nonnull align 8 dereferenceable(8) %8, i64 noundef %19)
  %20 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN4MintILx1000000007EEmLERKS0_(ptr noundef nonnull align 8 dereferenceable(8) %6, ptr noundef nonnull align 8 dereferenceable(8) %8)
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  br label %21

21:                                               ; preds = %18
  %22 = load i64, ptr %7, align 8, !tbaa !5
  %23 = add nsw i64 %22, -1
  store i64 %23, ptr %7, align 8, !tbaa !5
  br label %10, !llvm.loop !9

24:                                               ; preds = %17
  %25 = load i64, ptr %5, align 8, !tbaa !5
  %26 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorI4MintILx1000000007EESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) getelementptr inbounds (%class.Combination, ptr @C, i32 0, i32 2), i64 noundef %25) #3
  %27 = call i64 @_ZNK4MintILx1000000007EEmlERKS0_(ptr noundef nonnull align 8 dereferenceable(8) %6, ptr noundef nonnull align 8 dereferenceable(8) %26)
  %28 = getelementptr inbounds %class.Mint, ptr %3, i32 0, i32 0
  store i64 %27, ptr %28, align 8
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  %29 = getelementptr inbounds %class.Mint, ptr %3, i32 0, i32 0
  %30 = load i64, ptr %29, align 8
  ret i64 %30
}

; 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 @_ZN4MintILx1000000007EEC2Ex(ptr noundef nonnull align 8 dereferenceable(8), i64 noundef) unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN4MintILx1000000007EEmLERKS0_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #2 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 i64 @_ZNK4MintILx1000000007EEmlERKS0_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorI4MintILx1000000007EESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #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 long", !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"

%class.Combination = type { %"class.std::vector", %"class.std::vector", %"class.std::vector" }
%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<Mint<>, std::allocator<Mint<>>>::_Vector_impl" }
%"struct.std::_Vector_base<Mint<>, std::allocator<Mint<>>>::_Vector_impl" = type { %"struct.std::_Vector_base<Mint<>, std::allocator<Mint<>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<Mint<>, std::allocator<Mint<>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%class.Mint = type { i64 }

@C = external dso_local global %class.Combination, align 8

; Function Attrs: mustprogress nounwind uwtable
define dso_local i64 @_Z4combxx(i64 noundef %0, i64 noundef %1) local_unnamed_addr #0 {
  %3 = alloca %class.Mint, align 8
  %4 = alloca %class.Mint, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #2
  call void @_ZN4MintILx1000000007EEC2Ex(ptr noundef nonnull align 8 dereferenceable(8) %3, i64 noundef 1)
  %5 = sub nsw i64 %0, %1
  %.not.not7 = icmp sgt i64 %1, 0
  br i1 %.not.not7, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %2
  %6 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorI4MintILx1000000007EESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) getelementptr inbounds (i8, ptr @C, i64 48), i64 noundef %1) #2
  %7 = call i64 @_ZNK4MintILx1000000007EEmlERKS0_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(8) %6)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #2
  ret i64 %7

.lr.ph:                                           ; preds = %2, %.lr.ph
  %.08 = phi i64 [ %9, %.lr.ph ], [ %0, %2 ]
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #2
  call void @_ZN4MintILx1000000007EEC2Ex(ptr noundef nonnull align 8 dereferenceable(8) %4, i64 noundef %.08)
  %8 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN4MintILx1000000007EEmLERKS0_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(8) %4)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #2
  %9 = add nsw i64 %.08, -1
  %.not.not = icmp sgt i64 %9, %5
  br i1 %.not.not, label %.lr.ph, label %._crit_edge, !llvm.loop !5
}

; 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 @_ZN4MintILx1000000007EEC2Ex(ptr noundef nonnull align 8 dereferenceable(8), i64 noundef) unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN4MintILx1000000007EEmLERKS0_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) 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 i64 @_ZNK4MintILx1000000007EEmlERKS0_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorI4MintILx1000000007EESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #0 align 2

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


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