; LLVM IR from DionysiosB/CodeForces :: CodeforcesEDU (BinarySearch2C-VeryEasyTask)

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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_Z5checkxxxx(i64 noundef, i64 noundef, i64 noundef, i64 noundef) #0

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

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

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #2 {
  %1 = alloca i32, align 4
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  %9 = alloca i64, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #4
  %10 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2, ptr noundef %3, ptr noundef %4)
  %11 = load i64, ptr %3, align 8, !tbaa !5
  %12 = load i64, ptr %4, align 8, !tbaa !5
  %13 = icmp sgt i64 %11, %12
  br i1 %13, label %14, label %18

14:                                               ; preds = %0
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #4
  %15 = load i64, ptr %3, align 8, !tbaa !5
  store i64 %15, ptr %5, align 8, !tbaa !5
  %16 = load i64, ptr %4, align 8, !tbaa !5
  store i64 %16, ptr %3, align 8, !tbaa !5
  %17 = load i64, ptr %5, align 8, !tbaa !5
  store i64 %17, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #4
  br label %18

18:                                               ; preds = %14, %0
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #4
  store i64 0, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #4
  store i64 1000000000000000000, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #4
  store i64 0, ptr %8, align 8, !tbaa !5
  br label %19

19:                                               ; preds = %40, %18
  %20 = load i64, ptr %6, align 8, !tbaa !5
  %21 = load i64, ptr %7, align 8, !tbaa !5
  %22 = icmp sle i64 %20, %21
  br i1 %22, label %23, label %41

23:                                               ; preds = %19
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #4
  %24 = load i64, ptr %6, align 8, !tbaa !5
  %25 = load i64, ptr %7, align 8, !tbaa !5
  %26 = add nsw i64 %24, %25
  %27 = sdiv i64 %26, 2
  store i64 %27, ptr %9, align 8, !tbaa !5
  %28 = load i64, ptr %2, align 8, !tbaa !5
  %29 = load i64, ptr %3, align 8, !tbaa !5
  %30 = load i64, ptr %4, align 8, !tbaa !5
  %31 = load i64, ptr %9, align 8, !tbaa !5
  %32 = call noundef zeroext i1 @_Z5checkxxxx(i64 noundef %28, i64 noundef %29, i64 noundef %30, i64 noundef %31)
  br i1 %32, label %33, label %37

33:                                               ; preds = %23
  %34 = load i64, ptr %9, align 8, !tbaa !5
  store i64 %34, ptr %8, align 8, !tbaa !5
  %35 = load i64, ptr %9, align 8, !tbaa !5
  %36 = sub nsw i64 %35, 1
  store i64 %36, ptr %7, align 8, !tbaa !5
  br label %40

37:                                               ; preds = %23
  %38 = load i64, ptr %9, align 8, !tbaa !5
  %39 = add nsw i64 %38, 1
  store i64 %39, ptr %6, align 8, !tbaa !5
  br label %40

40:                                               ; preds = %37, %33
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #4
  br label %19, !llvm.loop !9

41:                                               ; preds = %19
  %42 = load i64, ptr %8, align 8, !tbaa !5
  %43 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i64 noundef %42)
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #4
  ret i32 0
}

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

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

attributes #0 = { 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!"long 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 [15 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [6 x i8], align 1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_Z5checkxxxx(i64 noundef, i64 noundef, i64 noundef, i64 noundef) local_unnamed_addr #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: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #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
  %3 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #4
  %4 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1, ptr noundef nonnull %2, ptr noundef nonnull %3)
  %5 = load i64, ptr %2, align 8, !tbaa !5
  %6 = load i64, ptr %3, align 8, !tbaa !5
  %7 = icmp sgt i64 %5, %6
  br i1 %7, label %8, label %.preheader

8:                                                ; preds = %0
  store i64 %6, ptr %2, align 8, !tbaa !5
  store i64 %5, ptr %3, align 8, !tbaa !5
  br label %.preheader

.preheader:                                       ; preds = %8, %0
  br label %9

9:                                                ; preds = %.preheader, %9
  %.018 = phi i64 [ %.1, %9 ], [ 0, %.preheader ]
  %.01017 = phi i64 [ %.111, %9 ], [ 0, %.preheader ]
  %.01216 = phi i64 [ %.113, %9 ], [ 1000000000000000000, %.preheader ]
  %10 = add nsw i64 %.018, %.01216
  %11 = sdiv i64 %10, 2
  %12 = load i64, ptr %1, align 8, !tbaa !5
  %13 = load i64, ptr %2, align 8, !tbaa !5
  %14 = load i64, ptr %3, align 8, !tbaa !5
  %15 = call noundef zeroext i1 @_Z5checkxxxx(i64 noundef %12, i64 noundef %13, i64 noundef %14, i64 noundef %11)
  %16 = add nsw i64 %11, -1
  %17 = add nsw i64 %11, 1
  %.113 = select i1 %15, i64 %16, i64 %.01216
  %.111 = select i1 %15, i64 %11, i64 %.01017
  %.1 = select i1 %15, i64 %.018, i64 %17
  %.not = icmp sgt i64 %.1, %.113
  br i1 %.not, label %18, label %9, !llvm.loop !9

18:                                               ; preds = %9
  %19 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i64 noundef %.111)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #4
  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
}

; 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 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 = { 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 = !{!"long 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,InstSimplifyPass,LCSSAPass,LoopRotatePass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass