; LLVM IR from xirc/cp-algorithm :: atcoder/abc092/B/main.ll (Z5solvev)

; 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 }

@N = external dso_local global i32, align 4
@D = external dso_local global i32, align 4
@X = external dso_local global i32, align 4
@A = external dso_local global %"class.std::vector", align 8

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z5solvev() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #2
  %6 = load i32, ptr @X, align 4, !tbaa !5
  store i32 %6, ptr %1, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #2
  store i32 0, ptr %2, align 4, !tbaa !5
  br label %7

7:                                                ; preds = %30, %0
  %8 = load i32, ptr %2, align 4, !tbaa !5
  %9 = load i32, ptr @N, align 4, !tbaa !5
  %10 = icmp slt i32 %8, %9
  br i1 %10, label %12, label %11

11:                                               ; preds = %7
  store i32 2, ptr %3, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #2
  br label %33

12:                                               ; preds = %7
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  %13 = load i32, ptr %2, align 4, !tbaa !5
  %14 = sext i32 %13 to i64
  %15 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) @A, i64 noundef %14) #2
  %16 = load i32, ptr %15, align 4, !tbaa !5
  store i32 %16, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  store i32 1, ptr %5, align 4, !tbaa !5
  br label %17

17:                                               ; preds = %25, %12
  %18 = load i32, ptr %5, align 4, !tbaa !5
  %19 = load i32, ptr @D, align 4, !tbaa !5
  %20 = icmp sle i32 %18, %19
  br i1 %20, label %22, label %21

21:                                               ; preds = %17
  store i32 5, ptr %3, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  br label %29

22:                                               ; preds = %17
  %23 = load i32, ptr %1, align 4, !tbaa !5
  %24 = add nsw i32 %23, 1
  store i32 %24, ptr %1, align 4, !tbaa !5
  br label %25

25:                                               ; preds = %22
  %26 = load i32, ptr %4, align 4, !tbaa !5
  %27 = load i32, ptr %5, align 4, !tbaa !5
  %28 = add nsw i32 %27, %26
  store i32 %28, ptr %5, align 4, !tbaa !5
  br label %17, !llvm.loop !9

29:                                               ; preds = %21
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  br label %30

30:                                               ; preds = %29
  %31 = load i32, ptr %2, align 4, !tbaa !5
  %32 = add nsw i32 %31, 1
  store i32 %32, ptr %2, align 4, !tbaa !5
  br label %7, !llvm.loop !11

33:                                               ; preds = %11
  %34 = load i32, ptr %1, align 4, !tbaa !5
  store i32 1, ptr %3, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #2
  ret i32 %34
}

; 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 noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #0 align 2

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

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 = { 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 = !{!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}


; 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 }

@N = external dso_local local_unnamed_addr global i32, align 4
@D = external dso_local local_unnamed_addr global i32, align 4
@X = external dso_local local_unnamed_addr global i32, align 4
@A = external dso_local global %"class.std::vector", align 8

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z5solvev() local_unnamed_addr #0 {
  %1 = load i32, ptr @X, align 4, !tbaa !5
  %2 = load i32, ptr @N, align 4, !tbaa !5
  %3 = icmp sgt i32 %2, 0
  br i1 %3, label %.lr.ph16, label %._crit_edge17

._crit_edge17:                                    ; preds = %._crit_edge, %0
  %.08.lcssa = phi i32 [ %1, %0 ], [ %.1.lcssa, %._crit_edge ]
  ret i32 %.08.lcssa

.lr.ph16:                                         ; preds = %0, %._crit_edge
  %indvars.iv = phi i64 [ %indvars.iv.next, %._crit_edge ], [ 0, %0 ]
  %.0814 = phi i32 [ %.1.lcssa, %._crit_edge ], [ %1, %0 ]
  %4 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) @A, i64 noundef %indvars.iv) #2
  %5 = load i32, ptr @D, align 4, !tbaa !5
  %.not10 = icmp slt i32 %5, 1
  br i1 %.not10, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %.lr.ph16
  %6 = load i32, ptr %4, align 4, !tbaa !5
  %7 = add i32 %6, 1
  %8 = add nuw i32 %5, 1
  %smax = tail call i32 @llvm.smax.i32(i32 %7, i32 %8)
  %9 = xor i32 %6, -1
  %10 = add i32 %smax, %9
  %11 = icmp ne i32 %10, 0
  %umin = zext i1 %11 to i32
  %12 = sub i32 %10, %umin
  %umax = tail call i32 @llvm.umax.i32(i32 %6, i32 1)
  %13 = udiv i32 %12, %umax
  %14 = add i32 %.0814, 1
  %15 = add i32 %14, %umin
  %16 = add i32 %15, %13
  br label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph.preheader, %.lr.ph16
  %.1.lcssa = phi i32 [ %.0814, %.lr.ph16 ], [ %16, %.lr.ph.preheader ]
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %17 = load i32, ptr @N, align 4, !tbaa !5
  %18 = sext i32 %17 to i64
  %19 = icmp slt i64 %indvars.iv.next, %18
  br i1 %19, label %.lr.ph16, label %._crit_edge17, !llvm.loop !9
}

; 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 #0 align 2

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.smax.i32(i32, i32) #1

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.umax.i32(i32, i32) #1

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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
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: GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass