; LLVM IR from xirc/cp-algorithm :: atcoder/abc204/C/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.0" = type { %"struct.std::_Bvector_base" }
%"struct.std::_Bvector_base" = type { %"struct.std::_Bvector_base<std::allocator<bool>>::_Bvector_impl" }
%"struct.std::_Bvector_base<std::allocator<bool>>::_Bvector_impl" = type { %"struct.std::_Bvector_base<std::allocator<bool>>::_Bvector_impl_data" }
%"struct.std::_Bvector_base<std::allocator<bool>>::_Bvector_impl_data" = type { %"struct.std::_Bit_iterator", %"struct.std::_Bit_iterator", ptr }
%"struct.std::_Bit_iterator" = type { %"struct.std::_Bit_iterator_base.base", [4 x i8] }
%"struct.std::_Bit_iterator_base.base" = type <{ ptr, i32 }>

@N = external dso_local global i32, align 4
@done = external dso_local global %"class.std::vector.0", align 8

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z3dfsi(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 uwtable
define dso_local noundef i32 @_Z5solvev() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i8, align 1
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #2
  store i32 0, 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 %4

4:                                                ; preds = %16, %0
  %5 = load i32, ptr %2, align 4, !tbaa !5
  %6 = load i32, ptr @N, align 4, !tbaa !5
  %7 = icmp slt i32 %5, %6
  br i1 %7, label %9, label %8

8:                                                ; preds = %4
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #2
  br label %19

9:                                                ; preds = %4
  %10 = load i32, ptr @N, align 4, !tbaa !5
  %11 = sext i32 %10 to i64
  call void @llvm.lifetime.start.p0(i64 1, ptr %3) #2
  store i8 0, ptr %3, align 1, !tbaa !9
  call void @_ZNSt6vectorIbSaIbEE6assignEmRKb(ptr noundef nonnull align 8 dereferenceable(40) @done, i64 noundef %11, ptr noundef nonnull align 1 dereferenceable(1) %3)
  call void @llvm.lifetime.end.p0(i64 1, ptr %3) #2
  %12 = load i32, ptr %2, align 4, !tbaa !5
  %13 = call noundef i32 @_Z3dfsi(i32 noundef %12)
  %14 = load i32, ptr %1, align 4, !tbaa !5
  %15 = add nsw i32 %14, %13
  store i32 %15, ptr %1, align 4, !tbaa !5
  br label %16

16:                                               ; preds = %9
  %17 = load i32, ptr %2, align 4, !tbaa !5
  %18 = add nsw i32 %17, 1
  store i32 %18, ptr %2, align 4, !tbaa !5
  br label %4, !llvm.loop !11

19:                                               ; preds = %8
  %20 = load i32, ptr %1, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #2
  ret i32 %20
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIbSaIbEE6assignEmRKb(ptr noundef nonnull align 8 dereferenceable(40), i64 noundef, ptr noundef nonnull align 1 dereferenceable(1)) #0 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 = { 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 = !{!"bool", !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.0" = type { %"struct.std::_Bvector_base" }
%"struct.std::_Bvector_base" = type { %"struct.std::_Bvector_base<std::allocator<bool>>::_Bvector_impl" }
%"struct.std::_Bvector_base<std::allocator<bool>>::_Bvector_impl" = type { %"struct.std::_Bvector_base<std::allocator<bool>>::_Bvector_impl_data" }
%"struct.std::_Bvector_base<std::allocator<bool>>::_Bvector_impl_data" = type { %"struct.std::_Bit_iterator", %"struct.std::_Bit_iterator", ptr }
%"struct.std::_Bit_iterator" = type { %"struct.std::_Bit_iterator_base.base", [4 x i8] }
%"struct.std::_Bit_iterator_base.base" = type <{ ptr, i32 }>

@N = external dso_local local_unnamed_addr global i32, align 4
@done = external dso_local global %"class.std::vector.0", align 8

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z3dfsi(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 uwtable
define dso_local noundef i32 @_Z5solvev() local_unnamed_addr #0 {
  %1 = alloca i8, align 1
  %2 = load i32, ptr @N, align 4, !tbaa !5
  %3 = icmp sgt i32 %2, 0
  br i1 %3, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %0
  %.05.lcssa = phi i32 [ 0, %0 ], [ %7, %.lr.ph ]
  ret i32 %.05.lcssa

.lr.ph:                                           ; preds = %0, %.lr.ph
  %4 = phi i32 [ %9, %.lr.ph ], [ %2, %0 ]
  %.08 = phi i32 [ %8, %.lr.ph ], [ 0, %0 ]
  %.057 = phi i32 [ %7, %.lr.ph ], [ 0, %0 ]
  %5 = sext i32 %4 to i64
  call void @llvm.lifetime.start.p0(i64 1, ptr nonnull %1) #2
  store i8 0, ptr %1, align 1, !tbaa !9
  call void @_ZNSt6vectorIbSaIbEE6assignEmRKb(ptr noundef nonnull align 8 dereferenceable(40) @done, i64 noundef %5, ptr noundef nonnull align 1 dereferenceable(1) %1)
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %1) #2
  %6 = call noundef i32 @_Z3dfsi(i32 noundef %.08)
  %7 = add nsw i32 %6, %.057
  %8 = add nuw nsw i32 %.08, 1
  %9 = load i32, ptr @N, align 4, !tbaa !5
  %10 = icmp slt i32 %8, %9
  br i1 %10, label %.lr.ph, label %._crit_edge, !llvm.loop !11
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIbSaIbEE6assignEmRKb(ptr noundef nonnull align 8 dereferenceable(40), i64 noundef, ptr noundef nonnull align 1 dereferenceable(1)) local_unnamed_addr #0 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 = { 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 = !{!"bool", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


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