; LLVM IR from kazunetakahashi/atcoder :: 2018/1229_AGC030/D.ll (Z5flushv)

; 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::basic_ostream" = type { ptr, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }

@N = external dso_local global i64, align 8
@T = external dso_local global [3010 x [3010 x i64]], align 16
@_ZSt4cout = external global %"class.std::basic_ostream", align 8

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
define dso_local void @_Z5flushv() #1 {
  %1 = alloca i64, align 8
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  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 4, ptr %2) #3
  store i32 0, ptr %2, align 4, !tbaa !9
  br label %5

5:                                                ; preds = %36, %0
  %6 = load i32, ptr %2, align 4, !tbaa !9
  %7 = sext i32 %6 to i64
  %8 = load i64, ptr @N, align 8, !tbaa !5
  %9 = icmp slt i64 %7, %8
  br i1 %9, label %11, label %10

10:                                               ; preds = %5
  store i32 2, ptr %3, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #3
  br label %39

11:                                               ; preds = %5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  %12 = load i32, ptr %2, align 4, !tbaa !9
  %13 = add nsw i32 %12, 1
  store i32 %13, ptr %4, align 4, !tbaa !9
  br label %14

14:                                               ; preds = %32, %11
  %15 = load i32, ptr %4, align 4, !tbaa !9
  %16 = sext i32 %15 to i64
  %17 = load i64, ptr @N, align 8, !tbaa !5
  %18 = icmp slt i64 %16, %17
  br i1 %18, label %20, label %19

19:                                               ; preds = %14
  store i32 5, ptr %3, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  br label %35

20:                                               ; preds = %14
  %21 = load i32, ptr %2, align 4, !tbaa !9
  %22 = sext i32 %21 to i64
  %23 = getelementptr inbounds [3010 x [3010 x i64]], ptr @T, i64 0, i64 %22
  %24 = load i32, ptr %4, align 4, !tbaa !9
  %25 = sext i32 %24 to i64
  %26 = getelementptr inbounds [3010 x i64], ptr %23, i64 0, i64 %25
  %27 = load i64, ptr %26, align 8, !tbaa !5
  %28 = load i64, ptr %1, align 8, !tbaa !5
  %29 = add nsw i64 %28, %27
  store i64 %29, ptr %1, align 8, !tbaa !5
  %30 = load i64, ptr %1, align 8, !tbaa !5
  %31 = srem i64 %30, 1000000007
  store i64 %31, ptr %1, align 8, !tbaa !5
  br label %32

32:                                               ; preds = %20
  %33 = load i32, ptr %4, align 4, !tbaa !9
  %34 = add nsw i32 %33, 1
  store i32 %34, ptr %4, align 4, !tbaa !9
  br label %14, !llvm.loop !11

35:                                               ; preds = %19
  br label %36

36:                                               ; preds = %35
  %37 = load i32, ptr %2, align 4, !tbaa !9
  %38 = add nsw i32 %37, 1
  store i32 %38, ptr %2, align 4, !tbaa !9
  br label %5, !llvm.loop !13

39:                                               ; preds = %10
  %40 = load i64, ptr %1, align 8, !tbaa !5
  %41 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEx(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i64 noundef %40)
  %42 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) %41, ptr noundef @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  call void @llvm.lifetime.end.p0(i64 8, ptr %1) #3
  ret void
}

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEx(ptr noundef nonnull align 8 dereferenceable(8), i64 noundef) #1 align 2

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) #1 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_(ptr noundef nonnull align 8 dereferenceable(8)) #2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { 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 #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"}
!13 = distinct !{!13, !12}


; 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::basic_ostream" = type { ptr, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }

@N = external dso_local local_unnamed_addr global i64, align 8
@T = external dso_local local_unnamed_addr global [3010 x [3010 x i64]], align 16
@_ZSt4cout = external global %"class.std::basic_ostream", align 8

; Function Attrs: mustprogress uwtable
define dso_local void @_Z5flushv() local_unnamed_addr #0 {
  %1 = load i64, ptr @N, align 8, !tbaa !5
  %2 = icmp sgt i64 %1, 0
  br i1 %2, label %.lr.ph18, label %._crit_edge

.loopexit:                                        ; preds = %.lr.ph, %.lr.ph18
  %.1.lcssa = phi i64 [ %.01116, %.lr.ph18 ], [ %9, %.lr.ph ]
  %indvars.iv.next = add nuw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next24, %1
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph18, !llvm.loop !9

._crit_edge:                                      ; preds = %.loopexit, %0
  %.011.lcssa = phi i64 [ 0, %0 ], [ %.1.lcssa, %.loopexit ]
  %3 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEx(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i64 noundef %.011.lcssa)
  %4 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  ret void

.lr.ph18:                                         ; preds = %0, %.loopexit
  %indvars.iv23 = phi i64 [ %indvars.iv.next24, %.loopexit ], [ 0, %0 ]
  %indvars.iv = phi i64 [ %indvars.iv.next, %.loopexit ], [ 1, %0 ]
  %.01116 = phi i64 [ %.1.lcssa, %.loopexit ], [ 0, %0 ]
  %indvars.iv.next24 = add nuw nsw i64 %indvars.iv23, 1
  %5 = icmp ugt i64 %1, %indvars.iv.next24
  br i1 %5, label %.lr.ph, label %.loopexit

.lr.ph:                                           ; preds = %.lr.ph18, %.lr.ph
  %indvars.iv20 = phi i64 [ %indvars.iv.next21, %.lr.ph ], [ %indvars.iv, %.lr.ph18 ]
  %.114 = phi i64 [ %9, %.lr.ph ], [ %.01116, %.lr.ph18 ]
  %6 = getelementptr inbounds [3010 x [3010 x i64]], ptr @T, i64 0, i64 %indvars.iv23, i64 %indvars.iv20
  %7 = load i64, ptr %6, align 8, !tbaa !5
  %8 = add nsw i64 %7, %.114
  %9 = srem i64 %8, 1000000007
  %indvars.iv.next21 = add nuw nsw i64 %indvars.iv20, 1
  %10 = icmp ugt i64 %1, %indvars.iv.next21
  br i1 %10, label %.lr.ph, label %.loopexit, !llvm.loop !11
}

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

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) local_unnamed_addr #0 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_(ptr noundef nonnull align 8 dereferenceable(8)) #1

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 = { 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" }

!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"}
!11 = distinct !{!11, !10}


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