; LLVM IR from DionysiosB/CodeForces :: 1788C-MatchingNumbers (main)

; 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 [4 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [9 x i8], align 1

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

8:                                                ; preds = %58, %56, %0
  %9 = load i64, ptr %2, align 8, !tbaa !5
  %10 = add nsw i64 %9, -1
  store i64 %10, ptr %2, align 8, !tbaa !5
  %11 = icmp ne i64 %9, 0
  br i1 %11, label %12, label %59

12:                                               ; preds = %8
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  %13 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %3)
  %14 = load i64, ptr %3, align 8, !tbaa !5
  %15 = srem i64 %14, 2
  %16 = icmp eq i64 %15, 0
  br i1 %16, label %17, label %19

17:                                               ; preds = %12
  %18 = call i32 @puts(ptr noundef @.str.1)
  store i32 2, ptr %4, align 4
  br label %56, !llvm.loop !9

19:                                               ; preds = %12
  %20 = call i32 @puts(ptr noundef @.str.2)
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  store i64 1, ptr %5, align 8, !tbaa !5
  br label %21

21:                                               ; preds = %34, %19
  %22 = load i64, ptr %5, align 8, !tbaa !5
  %23 = load i64, ptr %3, align 8, !tbaa !5
  %24 = icmp sle i64 %22, %23
  br i1 %24, label %26, label %25

25:                                               ; preds = %21
  store i32 4, ptr %4, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  br label %37

26:                                               ; preds = %21
  %27 = load i64, ptr %5, align 8, !tbaa !5
  %28 = load i64, ptr %3, align 8, !tbaa !5
  %29 = mul nsw i64 2, %28
  %30 = load i64, ptr %5, align 8, !tbaa !5
  %31 = sdiv i64 %30, 2
  %32 = sub nsw i64 %29, %31
  %33 = call i32 (ptr, ...) @printf(ptr noundef @.str.3, i64 noundef %27, i64 noundef %32)
  br label %34

34:                                               ; preds = %26
  %35 = load i64, ptr %5, align 8, !tbaa !5
  %36 = add nsw i64 %35, 2
  store i64 %36, ptr %5, align 8, !tbaa !5
  br label %21, !llvm.loop !11

37:                                               ; preds = %25
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  store i64 2, ptr %6, align 8, !tbaa !5
  br label %38

38:                                               ; preds = %52, %37
  %39 = load i64, ptr %6, align 8, !tbaa !5
  %40 = load i64, ptr %3, align 8, !tbaa !5
  %41 = icmp slt i64 %39, %40
  br i1 %41, label %43, label %42

42:                                               ; preds = %38
  store i32 7, ptr %4, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  br label %55

43:                                               ; preds = %38
  %44 = load i64, ptr %6, align 8, !tbaa !5
  %45 = load i64, ptr %3, align 8, !tbaa !5
  %46 = mul nsw i64 3, %45
  %47 = load i64, ptr %6, align 8, !tbaa !5
  %48 = sub nsw i64 %46, %47
  %49 = add nsw i64 %48, 1
  %50 = sdiv i64 %49, 2
  %51 = call i32 (ptr, ...) @printf(ptr noundef @.str.3, i64 noundef %44, i64 noundef %50)
  br label %52

52:                                               ; preds = %43
  %53 = load i64, ptr %6, align 8, !tbaa !5
  %54 = add nsw i64 %53, 2
  store i64 %54, ptr %6, align 8, !tbaa !5
  br label %38, !llvm.loop !12

55:                                               ; preds = %42
  store i32 0, ptr %4, align 4
  br label %56

56:                                               ; preds = %55, %17
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  %57 = load i32, ptr %4, align 4
  switch i32 %57, label %61 [
    i32 0, label %58
    i32 2, label %8
  ]

58:                                               ; preds = %56
  br label %8, !llvm.loop !9

59:                                               ; preds = %8
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  %60 = load i32, ptr %1, align 4
  ret i32 %60

61:                                               ; preds = %56
  unreachable
}

; 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 @puts(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 = !{!"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}
!12 = distinct !{!12, !10}


; 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 [4 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [9 x i8], align 1

; Function Attrs: mustprogress nofree norecurse nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca i64, align 8
  %2 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #3
  %3 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %4 = load i64, ptr %1, align 8, !tbaa !5
  %5 = add nsw i64 %4, -1
  store i64 %5, ptr %1, align 8, !tbaa !5
  %.not17 = icmp eq i64 %4, 0
  br i1 %.not17, label %._crit_edge, label %.lr.ph18

.lr.ph18:                                         ; preds = %0, %.loopexit
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  %6 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %2)
  %7 = load i64, ptr %2, align 8, !tbaa !5
  %8 = and i64 %7, 1
  %9 = icmp eq i64 %8, 0
  br i1 %9, label %10, label %12

10:                                               ; preds = %.lr.ph18
  %11 = call i32 @puts(ptr noundef nonnull dereferenceable(1) @.str.1)
  br label %.loopexit, !llvm.loop !9

12:                                               ; preds = %.lr.ph18
  %13 = call i32 @puts(ptr noundef nonnull dereferenceable(1) @.str.2)
  %14 = load i64, ptr %2, align 8, !tbaa !5
  %.not1213 = icmp slt i64 %14, 1
  br i1 %.not1213, label %.loopexit, label %.lr.ph

.preheader:                                       ; preds = %.lr.ph
  %15 = icmp sgt i64 %22, 2
  br i1 %15, label %.lr.ph16, label %.loopexit

.lr.ph:                                           ; preds = %12, %.lr.ph
  %16 = phi i64 [ %22, %.lr.ph ], [ %14, %12 ]
  %.0914 = phi i64 [ %21, %.lr.ph ], [ 1, %12 ]
  %17 = shl nsw i64 %16, 1
  %18 = lshr i64 %.0914, 1
  %19 = sub nsw i64 %17, %18
  %20 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.3, i64 noundef %.0914, i64 noundef %19)
  %21 = add nuw nsw i64 %.0914, 2
  %22 = load i64, ptr %2, align 8, !tbaa !5
  %.not12 = icmp sgt i64 %21, %22
  br i1 %.not12, label %.preheader, label %.lr.ph, !llvm.loop !11

.lr.ph16:                                         ; preds = %.preheader, %.lr.ph16
  %23 = phi i64 [ %29, %.lr.ph16 ], [ %22, %.preheader ]
  %.015 = phi i64 [ %28, %.lr.ph16 ], [ 2, %.preheader ]
  %24 = mul nsw i64 %23, 3
  %reass.sub = sub i64 %24, %.015
  %25 = add i64 %reass.sub, 1
  %26 = sdiv i64 %25, 2
  %27 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.3, i64 noundef %.015, i64 noundef %26)
  %28 = add nuw nsw i64 %.015, 2
  %29 = load i64, ptr %2, align 8, !tbaa !5
  %30 = icmp slt i64 %28, %29
  br i1 %30, label %.lr.ph16, label %.loopexit, !llvm.loop !12

.loopexit:                                        ; preds = %.lr.ph16, %12, %.preheader, %10
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  %31 = load i64, ptr %1, align 8, !tbaa !5
  %32 = add nsw i64 %31, -1
  store i64 %32, ptr %1, align 8, !tbaa !5
  %.not = icmp eq i64 %31, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph18

._crit_edge:                                      ; preds = %.loopexit, %0
  call void @llvm.lifetime.end.p0(i64 8, 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 @puts(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 = !{!"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}
!12 = distinct !{!12, !10}


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