; LLVM IR from DionysiosB/CodeForces :: 0300-0399 (301A-YaroslavAndSequence)

; 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 [3 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [5 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 i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i64, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #3
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  store i32 0, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  store i32 1001, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  store i32 0, ptr %6, align 4, !tbaa !5
  br label %9

9:                                                ; preds = %36, %0
  %10 = load i32, ptr %6, align 4, !tbaa !5
  %11 = load i32, ptr %2, align 4, !tbaa !5
  %12 = mul nsw i32 2, %11
  %13 = sub nsw i32 %12, 1
  %14 = icmp slt i32 %10, %13
  br i1 %14, label %16, label %15

15:                                               ; preds = %9
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  br label %39

16:                                               ; preds = %9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %17 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %7)
  %18 = load i32, ptr %7, align 4, !tbaa !5
  %19 = icmp slt i32 %18, 0
  br i1 %19, label %20, label %25

20:                                               ; preds = %16
  %21 = load i32, ptr %3, align 4, !tbaa !5
  %22 = add nsw i32 %21, 1
  store i32 %22, ptr %3, align 4, !tbaa !5
  %23 = load i32, ptr %7, align 4, !tbaa !5
  %24 = sub nsw i32 0, %23
  store i32 %24, ptr %7, align 4, !tbaa !5
  br label %25

25:                                               ; preds = %20, %16
  %26 = load i32, ptr %7, align 4, !tbaa !5
  %27 = sext i32 %26 to i64
  %28 = load i64, ptr %5, align 8, !tbaa !9
  %29 = add nsw i64 %28, %27
  store i64 %29, ptr %5, align 8, !tbaa !9
  %30 = load i32, ptr %7, align 4, !tbaa !5
  %31 = load i32, ptr %4, align 4, !tbaa !5
  %32 = icmp slt i32 %30, %31
  br i1 %32, label %33, label %35

33:                                               ; preds = %25
  %34 = load i32, ptr %7, align 4, !tbaa !5
  store i32 %34, ptr %4, align 4, !tbaa !5
  br label %35

35:                                               ; preds = %33, %25
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  br label %36

36:                                               ; preds = %35
  %37 = load i32, ptr %6, align 4, !tbaa !5
  %38 = add nsw i32 %37, 1
  store i32 %38, ptr %6, align 4, !tbaa !5
  br label %9, !llvm.loop !11

39:                                               ; preds = %15
  %40 = load i32, ptr %3, align 4, !tbaa !5
  %41 = srem i32 %40, 2
  %42 = icmp ne i32 %41, 0
  br i1 %42, label %43, label %53

43:                                               ; preds = %39
  %44 = load i32, ptr %2, align 4, !tbaa !5
  %45 = srem i32 %44, 2
  %46 = icmp ne i32 %45, 0
  br i1 %46, label %53, label %47

47:                                               ; preds = %43
  %48 = load i32, ptr %4, align 4, !tbaa !5
  %49 = mul nsw i32 2, %48
  %50 = sext i32 %49 to i64
  %51 = load i64, ptr %5, align 8, !tbaa !9
  %52 = sub nsw i64 %51, %50
  store i64 %52, ptr %5, align 8, !tbaa !9
  br label %53

53:                                               ; preds = %47, %43, %39
  %54 = load i64, ptr %5, align 8, !tbaa !9
  %55 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i64 noundef %54)
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  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

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

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

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", !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 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [5 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 i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #4
  %3 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %4 = load i32, ptr %1, align 4, !tbaa !5
  %5 = icmp sgt i32 %4, 0
  br i1 %5, label %.lr.ph, label %._crit_edge

._crit_edge.loopexit:                             ; preds = %.lr.ph
  %6 = and i32 %.113, 1
  %7 = icmp ne i32 %6, 0
  %8 = shl nsw i32 %spec.select, 1
  %9 = sext i32 %8 to i64
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %0
  %.012.lcssa = phi i1 [ false, %0 ], [ %7, %._crit_edge.loopexit ]
  %.010.lcssa = phi i64 [ 2002, %0 ], [ %9, %._crit_edge.loopexit ]
  %.09.lcssa = phi i64 [ undef, %0 ], [ %18, %._crit_edge.loopexit ]
  %.lcssa = phi i32 [ %4, %0 ], [ %20, %._crit_edge.loopexit ]
  %10 = and i32 %.lcssa, 1
  %.not16 = icmp eq i32 %10, 0
  %or.cond = and i1 %.012.lcssa, %.not16
  %11 = select i1 %or.cond, i64 %.010.lcssa, i64 0
  %.1 = sub nsw i64 %.09.lcssa, %11
  %12 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i64 noundef %.1)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #4
  ret i32 0

.lr.ph:                                           ; preds = %0, %.lr.ph
  %.020 = phi i32 [ %19, %.lr.ph ], [ 0, %0 ]
  %.0919 = phi i64 [ %18, %.lr.ph ], [ undef, %0 ]
  %.01018 = phi i32 [ %spec.select, %.lr.ph ], [ 1001, %0 ]
  %.01217 = phi i32 [ %.113, %.lr.ph ], [ 0, %0 ]
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #4
  %13 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %2)
  %14 = load i32, ptr %2, align 4, !tbaa !5
  %15 = call i32 @llvm.abs.i32(i32 %14, i1 true)
  %16 = lshr i32 %14, 31
  %.113 = add i32 %.01217, %16
  %17 = zext nneg i32 %15 to i64
  %18 = add nsw i64 %.0919, %17
  %spec.select = call i32 @llvm.smin.i32(i32 %15, i32 %.01018)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #4
  %19 = add nuw nsw i32 %.020, 1
  %20 = load i32, ptr %1, align 4, !tbaa !5
  %21 = shl nsw i32 %20, 1
  %22 = add nsw i32 %21, -1
  %23 = icmp slt i32 %19, %22
  br i1 %23, label %.lr.ph, label %._crit_edge.loopexit, !llvm.loop !9
}

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

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

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.smin.i32(i32, i32) #3

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.abs.i32(i32, i1 immarg) #3

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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
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"}


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