; LLVM IR from tangjz/acm-icpc :: 51nod (1222)

; 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"

@mu = external dso_local global [316228 x i32], align 16
@.str = external hidden unnamed_addr constant [9 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [6 x i8], align 1

; 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 nounwind uwtable
declare dso_local noundef i64 @_Z4calcx(i64 noundef) #1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #2 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  store i32 0, ptr %1, align 4
  store i32 1, ptr getelementptr inbounds ([316228 x i32], ptr @mu, i64 0, i64 1), align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #4
  store i32 1, ptr %2, align 4, !tbaa !5
  br label %7

7:                                                ; preds = %33, %0
  %8 = load i32, ptr %2, align 4, !tbaa !5
  %9 = icmp slt i32 %8, 316228
  br i1 %9, label %11, label %10

10:                                               ; preds = %7
  store i32 2, ptr %3, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #4
  br label %36

11:                                               ; preds = %7
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #4
  %12 = load i32, ptr %2, align 4, !tbaa !5
  %13 = shl i32 %12, 1
  store i32 %13, ptr %4, align 4, !tbaa !5
  br label %14

14:                                               ; preds = %28, %11
  %15 = load i32, ptr %4, align 4, !tbaa !5
  %16 = icmp slt i32 %15, 316228
  br i1 %16, label %18, label %17

17:                                               ; preds = %14
  store i32 5, ptr %3, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #4
  br label %32

18:                                               ; preds = %14
  %19 = load i32, ptr %2, align 4, !tbaa !5
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds [316228 x i32], ptr @mu, i64 0, i64 %20
  %22 = load i32, ptr %21, align 4, !tbaa !5
  %23 = load i32, ptr %4, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds [316228 x i32], ptr @mu, i64 0, i64 %24
  %26 = load i32, ptr %25, align 4, !tbaa !5
  %27 = sub nsw i32 %26, %22
  store i32 %27, ptr %25, align 4, !tbaa !5
  br label %28

28:                                               ; preds = %18
  %29 = load i32, ptr %2, align 4, !tbaa !5
  %30 = load i32, ptr %4, align 4, !tbaa !5
  %31 = add nsw i32 %30, %29
  store i32 %31, ptr %4, align 4, !tbaa !5
  br label %14, !llvm.loop !9

32:                                               ; preds = %17
  br label %33

33:                                               ; preds = %32
  %34 = load i32, ptr %2, align 4, !tbaa !5
  %35 = add nsw i32 %34, 1
  store i32 %35, ptr %2, align 4, !tbaa !5
  br label %7, !llvm.loop !11

36:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #4
  %37 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %5, ptr noundef %6)
  %38 = load i64, ptr %6, align 8, !tbaa !12
  %39 = call noundef i64 @_Z4calcx(i64 noundef %38)
  %40 = load i64, ptr %5, align 8, !tbaa !12
  %41 = sub nsw i64 %40, 1
  %42 = call noundef i64 @_Z4calcx(i64 noundef %41)
  %43 = sub nsw i64 %39, %42
  %44 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i64 noundef %43)
  store i32 0, ptr %1, align 4
  store i32 1, ptr %3, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #4
  %45 = load i32, ptr %1, align 4
  ret i32 %45
}

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

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

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}
!12 = !{!13, !13, i64 0}
!13 = !{!"long long", !7, i64 0}


; 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"

@mu = external dso_local local_unnamed_addr global [316228 x i32], align 16
@.str = external hidden unnamed_addr constant [9 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [6 x i8], align 1

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

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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_Z4calcx(i64 noundef) local_unnamed_addr #1

; Function Attrs: mustprogress norecurse nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #2 {
  %1 = alloca i64, align 8
  %2 = alloca i64, align 8
  store i32 1, ptr getelementptr inbounds (i8, ptr @mu, i64 4), align 4, !tbaa !5
  br label %12

3:                                                ; preds = %._crit_edge
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #4
  %4 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1, ptr noundef nonnull %2)
  %5 = load i64, ptr %2, align 8, !tbaa !9
  %6 = call noundef i64 @_Z4calcx(i64 noundef %5)
  %7 = load i64, ptr %1, align 8, !tbaa !9
  %8 = add nsw i64 %7, -1
  %9 = call noundef i64 @_Z4calcx(i64 noundef %8)
  %10 = sub nsw i64 %6, %9
  %11 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i64 noundef %10)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %1) #4
  ret i32 0

12:                                               ; preds = %0, %._crit_edge
  %indvars.iv12 = phi i64 [ 1, %0 ], [ %indvars.iv.next13, %._crit_edge ]
  %indvars.iv = phi i64 [ 2, %0 ], [ %indvars.iv.next, %._crit_edge ]
  %13 = icmp ult i64 %indvars.iv12, 158114
  br i1 %13, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %12
  %14 = getelementptr inbounds [316228 x i32], ptr @mu, i64 0, i64 %indvars.iv12
  br label %15

._crit_edge:                                      ; preds = %15, %12
  %indvars.iv.next13 = add nuw nsw i64 %indvars.iv12, 1
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 2
  %exitcond.not = icmp eq i64 %indvars.iv.next13, 316228
  br i1 %exitcond.not, label %3, label %12, !llvm.loop !11

15:                                               ; preds = %.lr.ph, %15
  %indvars.iv14 = phi i64 [ %indvars.iv, %.lr.ph ], [ %indvars.iv.next15, %15 ]
  %16 = load i32, ptr %14, align 4, !tbaa !5
  %17 = getelementptr inbounds [316228 x i32], ptr @mu, i64 0, i64 %indvars.iv14
  %18 = load i32, ptr %17, align 4, !tbaa !5
  %19 = sub nsw i32 %18, %16
  store i32 %19, ptr %17, align 4, !tbaa !5
  %indvars.iv.next15 = add nuw nsw i64 %indvars.iv14, %indvars.iv12
  %20 = icmp ult i64 %indvars.iv.next15, 316228
  br i1 %20, label %15, label %._crit_edge, !llvm.loop !13
}

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


; Effective O3 passes: GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass