; LLVM IR from xirc/cp-algorithm :: codeforces/1100E/main.ll (Z9binsearchv)

; 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.5" = type { %"struct.std::_Vector_base.6" }
%"struct.std::_Vector_base.6" = 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

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z5tsorti(ptr dead_on_unwind noalias writable sret(%"class.std::vector.5") align 8, i32 noundef) #0

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

; 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

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z9binsearchv() #0 {
  %1 = alloca i64, align 8
  %2 = alloca i64, align 8
  %3 = alloca i32, align 4
  %4 = alloca %"class.std::vector.5", align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %1) #3
  store i64 0, ptr %1, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #3
  store i64 1000000001, ptr %2, align 8, !tbaa !5
  br label %5

5:                                                ; preds = %27, %0
  %6 = load i64, ptr %1, align 8, !tbaa !5
  %7 = load i64, ptr %2, align 8, !tbaa !5
  %8 = icmp slt i64 %6, %7
  br i1 %8, label %9, label %28

9:                                                ; preds = %5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  %10 = load i64, ptr %1, align 8, !tbaa !5
  %11 = load i64, ptr %2, align 8, !tbaa !5
  %12 = add nsw i64 %10, %11
  %13 = sdiv i64 %12, 2
  %14 = trunc i64 %13 to i32
  store i32 %14, ptr %3, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 24, ptr %4) #3
  %15 = load i32, ptr %3, align 4, !tbaa !9
  call void @_Z5tsorti(ptr dead_on_unwind writable sret(%"class.std::vector.5") align 8 %4, i32 noundef %15)
  %16 = call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %4) #3
  %17 = load i32, ptr @N, align 4, !tbaa !9
  %18 = sext i32 %17 to i64
  %19 = icmp ult i64 %16, %18
  br i1 %19, label %20, label %24

20:                                               ; preds = %9
  %21 = load i32, ptr %3, align 4, !tbaa !9
  %22 = add nsw i32 %21, 1
  %23 = sext i32 %22 to i64
  store i64 %23, ptr %1, align 8, !tbaa !5
  br label %27

24:                                               ; preds = %9
  %25 = load i32, ptr %3, align 4, !tbaa !9
  %26 = sext i32 %25 to i64
  store i64 %26, ptr %2, align 8, !tbaa !5
  br label %27

27:                                               ; preds = %24, %20
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %4) #3
  call void @llvm.lifetime.end.p0(i64 24, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  br label %5, !llvm.loop !11

28:                                               ; preds = %5
  %29 = load i64, ptr %1, align 8, !tbaa !5
  %30 = trunc i64 %29 to i32
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %1) #3
  ret i32 %30
}

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

%"class.std::vector.5" = type { %"struct.std::_Vector_base.6" }
%"struct.std::_Vector_base.6" = 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

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z5tsorti(ptr dead_on_unwind noalias writable sret(%"class.std::vector.5") align 8, i32 noundef) local_unnamed_addr #0

; 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 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

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z9binsearchv() local_unnamed_addr #0 {
  %1 = alloca %"class.std::vector.5", align 8
  br label %2

2:                                                ; preds = %0, %2
  %.012 = phi i64 [ 0, %0 ], [ %.1, %2 ]
  %.0811 = phi i64 [ 1000000001, %0 ], [ %.19, %2 ]
  %3 = add nsw i64 %.012, %.0811
  %4 = sdiv i64 %3, 2
  %5 = trunc i64 %4 to i32
  call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %1) #3
  call void @_Z5tsorti(ptr dead_on_unwind nonnull writable sret(%"class.std::vector.5") align 8 %1, i32 noundef %5)
  %6 = call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %1) #3
  %7 = load i32, ptr @N, align 4, !tbaa !5
  %8 = sext i32 %7 to i64
  %9 = icmp ult i64 %6, %8
  %10 = shl i64 %4, 32
  %sext10 = add i64 %10, 4294967296
  %11 = ashr exact i64 %sext10, 32
  %12 = ashr exact i64 %10, 32
  %.19 = select i1 %9, i64 %.0811, i64 %12
  %.1 = select i1 %9, i64 %11, i64 %.012
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %1) #3
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %1) #3
  %13 = icmp slt i64 %.1, %.19
  br i1 %13, label %2, label %14, !llvm.loop !9

14:                                               ; preds = %2
  %15 = trunc i64 %.1 to i32
  ret i32 %15
}

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


; Effective O3 passes: GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LoopRotatePass,LoopUnrollPass,ReassociatePass,SROAPass,SimplifyCFGPass