; LLVM IR from tangjz/acm-icpc :: 51nod (1404)

; 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"

@.str.4 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [13 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [6 x i8], align 1

; Function Attrs: mustprogress uwtable
declare dso_local noundef i64 @_Z7mod_mulxx(i64 noundef, i64 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
declare dso_local noundef i64 @_Z1Cyy(i64 noundef, i64 noundef) #0

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #2 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #4
  %6 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.4, ptr noundef %2)
  br label %7

7:                                                ; preds = %46, %0
  %8 = load i32, ptr %2, align 4, !tbaa !5
  %9 = add nsw i32 %8, -1
  store i32 %9, ptr %2, align 4, !tbaa !5
  %10 = icmp ne i32 %8, 0
  br i1 %10, label %11, label %49

11:                                               ; preds = %7
  %12 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.5, ptr noundef %3, ptr noundef %4, ptr noundef %5)
  %13 = load i64, ptr %3, align 8, !tbaa !9
  %14 = icmp ugt i64 %13, 0
  br i1 %14, label %15, label %42

15:                                               ; preds = %11
  %16 = load i64, ptr %3, align 8, !tbaa !9
  %17 = sub i64 %16, 1
  %18 = lshr i64 %17, 1
  %19 = load i64, ptr %5, align 8, !tbaa !9
  %20 = icmp uge i64 %18, %19
  br i1 %20, label %21, label %42

21:                                               ; preds = %15
  %22 = load i64, ptr %4, align 8, !tbaa !9
  %23 = icmp ugt i64 %22, 0
  br i1 %23, label %24, label %42

24:                                               ; preds = %21
  %25 = load i64, ptr %4, align 8, !tbaa !9
  %26 = sub i64 %25, 1
  %27 = lshr i64 %26, 1
  %28 = load i64, ptr %5, align 8, !tbaa !9
  %29 = icmp uge i64 %27, %28
  br i1 %29, label %30, label %42

30:                                               ; preds = %24
  %31 = load i64, ptr %3, align 8, !tbaa !9
  %32 = sub i64 %31, 1
  %33 = load i64, ptr %5, align 8, !tbaa !9
  %34 = shl i64 %33, 1
  %35 = call noundef i64 @_Z1Cyy(i64 noundef %32, i64 noundef %34)
  %36 = load i64, ptr %4, align 8, !tbaa !9
  %37 = sub i64 %36, 1
  %38 = load i64, ptr %5, align 8, !tbaa !9
  %39 = shl i64 %38, 1
  %40 = call noundef i64 @_Z1Cyy(i64 noundef %37, i64 noundef %39)
  %41 = call noundef i64 @_Z7mod_mulxx(i64 noundef %35, i64 noundef %40)
  br label %46

42:                                               ; preds = %24, %21, %15, %11
  %43 = load i64, ptr %5, align 8, !tbaa !9
  %44 = icmp eq i64 %43, 0
  %45 = zext i1 %44 to i64
  br label %46

46:                                               ; preds = %42, %30
  %47 = phi i64 [ %41, %30 ], [ %45, %42 ]
  %48 = call i32 (ptr, ...) @printf(ptr noundef @.str.6, i64 noundef %47)
  br label %7, !llvm.loop !11

49:                                               ; preds = %7
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #4
  ret i32 0
}

declare i32 @__isoc99_scanf(ptr noundef, ...) #3

declare i32 @printf(ptr noundef, ...) #3

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 norecurse 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 = { "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 #4 = { 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 = !{!"long long", !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"

@.str.4 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [13 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [6 x i8], align 1

; Function Attrs: mustprogress uwtable
declare dso_local noundef i64 @_Z7mod_mulxx(i64 noundef, i64 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
declare dso_local noundef i64 @_Z1Cyy(i64 noundef, i64 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #2 {
  %1 = alloca i32, align 4
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #4
  %5 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.4, ptr noundef nonnull %1)
  %6 = load i32, ptr %1, align 4, !tbaa !5
  %7 = add nsw i32 %6, -1
  store i32 %7, ptr %1, align 4, !tbaa !5
  %.not6 = icmp eq i32 %6, 0
  br i1 %.not6, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %0, %31
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.5, ptr noundef nonnull %2, ptr noundef nonnull %3, ptr noundef nonnull %4)
  %9 = load i64, ptr %2, align 8, !tbaa !9
  %.not4 = icmp eq i64 %9, 0
  %.pre = load i64, ptr %4, align 8, !tbaa !9
  br i1 %.not4, label %28, label %10

10:                                               ; preds = %.lr.ph
  %11 = add i64 %9, -1
  %12 = lshr i64 %11, 1
  %13 = icmp uge i64 %12, %.pre
  %14 = load i64, ptr %3, align 8
  %15 = icmp ne i64 %14, 0
  %or.cond = select i1 %13, i1 %15, i1 false
  br i1 %or.cond, label %16, label %28

16:                                               ; preds = %10
  %17 = add i64 %14, -1
  %18 = lshr i64 %17, 1
  %.not5 = icmp ult i64 %18, %.pre
  br i1 %.not5, label %28, label %19

19:                                               ; preds = %16
  %20 = shl nuw i64 %.pre, 1
  %21 = call noundef i64 @_Z1Cyy(i64 noundef %11, i64 noundef %20)
  %22 = load i64, ptr %3, align 8, !tbaa !9
  %23 = add i64 %22, -1
  %24 = load i64, ptr %4, align 8, !tbaa !9
  %25 = shl i64 %24, 1
  %26 = call noundef i64 @_Z1Cyy(i64 noundef %23, i64 noundef %25)
  %27 = call noundef i64 @_Z7mod_mulxx(i64 noundef %21, i64 noundef %26)
  br label %31

28:                                               ; preds = %16, %10, %.lr.ph
  %29 = icmp eq i64 %.pre, 0
  %30 = zext i1 %29 to i64
  br label %31

31:                                               ; preds = %28, %19
  %32 = phi i64 [ %27, %19 ], [ %30, %28 ]
  %33 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.6, i64 noundef %32)
  %34 = load i32, ptr %1, align 4, !tbaa !5
  %35 = add nsw i32 %34, -1
  store i32 %35, ptr %1, align 4, !tbaa !5
  %.not = icmp eq i32 %34, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !11

._crit_edge:                                      ; preds = %31, %0
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #4
  ret i32 0
}

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #3

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #3

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 norecurse 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 = { nofree nounwind "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 #4 = { 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 = !{!"long long", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


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