; LLVM IR from DionysiosB/CodeForces :: 1300-1399 (1311A-AddOddOrSubtractEven)

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

6:                                                ; preds = %69, %0
  %7 = load i64, ptr %2, align 8, !tbaa !5
  %8 = add nsw i64 %7, -1
  store i64 %8, ptr %2, align 8, !tbaa !5
  %9 = icmp ne i64 %7, 0
  br i1 %9, label %10, label %70

10:                                               ; preds = %6
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %11 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %3, ptr noundef %4)
  %12 = load i64, ptr %3, align 8, !tbaa !5
  %13 = load i64, ptr %4, align 8, !tbaa !5
  %14 = icmp eq i64 %12, %13
  br i1 %14, label %15, label %17

15:                                               ; preds = %10
  %16 = call i32 @puts(ptr noundef @.str.2)
  br label %69

17:                                               ; preds = %10
  %18 = load i64, ptr %4, align 8, !tbaa !5
  %19 = load i64, ptr %3, align 8, !tbaa !5
  %20 = icmp sgt i64 %18, %19
  br i1 %20, label %21, label %29

21:                                               ; preds = %17
  %22 = load i64, ptr %4, align 8, !tbaa !5
  %23 = load i64, ptr %3, align 8, !tbaa !5
  %24 = sub nsw i64 %22, %23
  %25 = srem i64 %24, 2
  %26 = icmp eq i64 %25, 1
  br i1 %26, label %27, label %29

27:                                               ; preds = %21
  %28 = call i32 @puts(ptr noundef @.str.3)
  br label %68

29:                                               ; preds = %21, %17
  %30 = load i64, ptr %4, align 8, !tbaa !5
  %31 = load i64, ptr %3, align 8, !tbaa !5
  %32 = icmp sgt i64 %30, %31
  br i1 %32, label %33, label %41

33:                                               ; preds = %29
  %34 = load i64, ptr %4, align 8, !tbaa !5
  %35 = load i64, ptr %3, align 8, !tbaa !5
  %36 = sub nsw i64 %34, %35
  %37 = srem i64 %36, 2
  %38 = icmp eq i64 %37, 0
  br i1 %38, label %39, label %41

39:                                               ; preds = %33
  %40 = call i32 @puts(ptr noundef @.str.4)
  br label %67

41:                                               ; preds = %33, %29
  %42 = load i64, ptr %3, align 8, !tbaa !5
  %43 = load i64, ptr %4, align 8, !tbaa !5
  %44 = icmp sgt i64 %42, %43
  br i1 %44, label %45, label %53

45:                                               ; preds = %41
  %46 = load i64, ptr %3, align 8, !tbaa !5
  %47 = load i64, ptr %4, align 8, !tbaa !5
  %48 = sub nsw i64 %46, %47
  %49 = srem i64 %48, 2
  %50 = icmp eq i64 %49, 0
  br i1 %50, label %51, label %53

51:                                               ; preds = %45
  %52 = call i32 @puts(ptr noundef @.str.3)
  br label %66

53:                                               ; preds = %45, %41
  %54 = load i64, ptr %3, align 8, !tbaa !5
  %55 = load i64, ptr %4, align 8, !tbaa !5
  %56 = icmp sgt i64 %54, %55
  br i1 %56, label %57, label %65

57:                                               ; preds = %53
  %58 = load i64, ptr %3, align 8, !tbaa !5
  %59 = load i64, ptr %4, align 8, !tbaa !5
  %60 = sub nsw i64 %58, %59
  %61 = srem i64 %60, 2
  %62 = icmp eq i64 %61, 1
  br i1 %62, label %63, label %65

63:                                               ; preds = %57
  %64 = call i32 @puts(ptr noundef @.str.4)
  br label %65

65:                                               ; preds = %63, %57, %53
  br label %66

66:                                               ; preds = %65, %51
  br label %67

67:                                               ; preds = %66, %39
  br label %68

68:                                               ; preds = %67, %27
  br label %69

69:                                               ; preds = %68, %15
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  br label %6, !llvm.loop !9

70:                                               ; preds = %6
  call void @llvm.lifetime.end.p0(i64 8, 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 @puts(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"}


; 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 [8 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [2 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [2 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [2 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
  %3 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #3
  %4 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %5 = load i64, ptr %1, align 8, !tbaa !5
  %6 = add nsw i64 %5, -1
  store i64 %6, ptr %1, align 8, !tbaa !5
  %.not9 = icmp eq i64 %5, 0
  br i1 %.not9, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %0, %30
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #3
  %7 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %2, ptr noundef nonnull %3)
  %8 = load i64, ptr %2, align 8, !tbaa !5
  %9 = load i64, ptr %3, align 8, !tbaa !5
  %10 = icmp eq i64 %8, %9
  br i1 %10, label %.sink.split, label %11

11:                                               ; preds = %.lr.ph
  %12 = icmp sgt i64 %9, %8
  br i1 %12, label %13, label %20

13:                                               ; preds = %11
  %14 = sub nsw i64 %9, %8
  %15 = and i64 %14, -9223372036854775807
  %16 = icmp eq i64 %15, 1
  br i1 %16, label %.sink.split, label %17

17:                                               ; preds = %13
  %18 = and i64 %14, 1
  %19 = icmp eq i64 %18, 0
  br i1 %19, label %.sink.split, label %20

20:                                               ; preds = %11, %17
  %21 = icmp sgt i64 %8, %9
  br i1 %21, label %22, label %30

22:                                               ; preds = %20
  %23 = sub nsw i64 %8, %9
  %24 = and i64 %23, 1
  %25 = icmp eq i64 %24, 0
  br i1 %25, label %.sink.split, label %26

26:                                               ; preds = %22
  %27 = and i64 %23, -9223372036854775807
  %28 = icmp eq i64 %27, 1
  br i1 %28, label %.sink.split, label %30

.sink.split:                                      ; preds = %26, %22, %17, %13, %.lr.ph
  %.str.3.sink = phi ptr [ @.str.2, %.lr.ph ], [ @.str.3, %13 ], [ @.str.4, %17 ], [ @.str.3, %22 ], [ @.str.4, %26 ]
  %29 = call i32 @puts(ptr noundef nonnull dereferenceable(1) %.str.3.sink)
  br label %30

30:                                               ; preds = %.sink.split, %20, %26
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  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.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %30, %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: 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"}


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