; LLVM IR from DionysiosB/CodeForces :: 0500-0599 (598A-TrickySum)

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

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #0 {
  %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) #3
  %6 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  br label %7

7:                                                ; preds = %29, %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 %32

11:                                               ; preds = %7
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  %12 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %3)
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %13 = load i64, ptr %3, align 8, !tbaa !9
  %14 = load i64, ptr %3, align 8, !tbaa !9
  %15 = add nsw i64 %14, 1
  %16 = mul nsw i64 %13, %15
  %17 = sdiv i64 %16, 2
  store i64 %17, ptr %4, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  store i64 1, ptr %5, align 8, !tbaa !9
  br label %18

18:                                               ; preds = %22, %11
  %19 = load i64, ptr %5, align 8, !tbaa !9
  %20 = load i64, ptr %3, align 8, !tbaa !9
  %21 = icmp sle i64 %19, %20
  br i1 %21, label %22, label %29

22:                                               ; preds = %18
  %23 = load i64, ptr %5, align 8, !tbaa !9
  %24 = mul nsw i64 2, %23
  %25 = load i64, ptr %4, align 8, !tbaa !9
  %26 = sub nsw i64 %25, %24
  store i64 %26, ptr %4, align 8, !tbaa !9
  %27 = load i64, ptr %5, align 8, !tbaa !9
  %28 = mul nsw i64 %27, 2
  store i64 %28, ptr %5, align 8, !tbaa !9
  br label %18, !llvm.loop !11

29:                                               ; preds = %18
  %30 = load i64, ptr %4, align 8, !tbaa !9
  %31 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i64 noundef %30)
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  br label %7, !llvm.loop !13

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

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

declare i32 @__isoc99_scanf(ptr noundef, ...) #2

declare i32 @printf(ptr noundef, ...) #2

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

attributes #0 = { 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { "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 = !{!10, !10, i64 0}
!10 = !{!"long long", !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"

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

; Function Attrs: mustprogress nofree norecurse nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca i32, align 4
  %2 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #3
  %3 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %4 = load i32, ptr %1, align 4, !tbaa !5
  %5 = add nsw i32 %4, -1
  store i32 %5, ptr %1, align 4, !tbaa !5
  %.not10 = icmp eq i32 %4, 0
  br i1 %.not10, label %._crit_edge13, label %.lr.ph12

.lr.ph12:                                         ; preds = %0, %._crit_edge
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  %6 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %2)
  %7 = load i64, ptr %2, align 8, !tbaa !9
  %8 = add nsw i64 %7, 1
  %9 = mul nsw i64 %8, %7
  %10 = sdiv i64 %9, 2
  %.not67 = icmp slt i64 %7, 1
  br i1 %.not67, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph12, %.lr.ph
  %.09 = phi i64 [ %11, %.lr.ph ], [ 1, %.lr.ph12 ]
  %.058 = phi i64 [ %12, %.lr.ph ], [ %10, %.lr.ph12 ]
  %11 = shl nsw i64 %.09, 1
  %12 = sub nsw i64 %.058, %11
  %.not6 = icmp sgt i64 %11, %7
  br i1 %.not6, label %._crit_edge, label %.lr.ph, !llvm.loop !11

._crit_edge:                                      ; preds = %.lr.ph, %.lr.ph12
  %.05.lcssa = phi i64 [ %10, %.lr.ph12 ], [ %12, %.lr.ph ]
  %13 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i64 noundef %.05.lcssa)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  %14 = load i32, ptr %1, align 4, !tbaa !5
  %15 = add nsw i32 %14, -1
  store i32 %15, ptr %1, align 4, !tbaa !5
  %.not = icmp eq i32 %14, 0
  br i1 %.not, label %._crit_edge13, label %.lr.ph12, !llvm.loop !13

._crit_edge13:                                    ; preds = %._crit_edge, %0
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #3
  ret i32 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: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

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

attributes #0 = { mustprogress nofree 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 #1 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #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 = !{!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: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass