; LLVM IR from DionysiosB/CodeForces :: 0900-0999 (914A-PerfectSquares)

; 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 [5 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
  %5 = alloca i64, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #4
  %6 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #4
  store i64 -100000000, ptr %3, align 8, !tbaa !5
  br label %7

7:                                                ; preds = %42, %0
  %8 = load i64, ptr %2, align 8, !tbaa !5
  %9 = add nsw i64 %8, -1
  store i64 %9, ptr %2, align 8, !tbaa !5
  %10 = icmp ne i64 %8, 0
  br i1 %10, label %11, label %43

11:                                               ; preds = %7
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #4
  %12 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %4)
  %13 = load i64, ptr %4, align 8, !tbaa !5
  %14 = icmp sge i64 %13, 0
  br i1 %14, label %15, label %32

15:                                               ; preds = %11
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #4
  %16 = load i64, ptr %4, align 8, !tbaa !5
  %17 = sitofp i64 %16 to double
  %18 = call double @sqrt(double noundef %17) #4
  %19 = fptosi double %18 to i64
  store i64 %19, ptr %5, align 8, !tbaa !5
  %20 = load i64, ptr %5, align 8, !tbaa !5
  %21 = load i64, ptr %5, align 8, !tbaa !5
  %22 = mul nsw i64 %20, %21
  %23 = load i64, ptr %4, align 8, !tbaa !5
  %24 = icmp slt i64 %22, %23
  br i1 %24, label %25, label %31

25:                                               ; preds = %15
  %26 = load i64, ptr %4, align 8, !tbaa !5
  %27 = load i64, ptr %3, align 8, !tbaa !5
  %28 = icmp sgt i64 %26, %27
  br i1 %28, label %29, label %31

29:                                               ; preds = %25
  %30 = load i64, ptr %4, align 8, !tbaa !5
  store i64 %30, ptr %3, align 8, !tbaa !5
  br label %31

31:                                               ; preds = %29, %25, %15
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #4
  br label %42

32:                                               ; preds = %11
  %33 = load i64, ptr %3, align 8, !tbaa !5
  %34 = load i64, ptr %4, align 8, !tbaa !5
  %35 = icmp sgt i64 %33, %34
  br i1 %35, label %36, label %38

36:                                               ; preds = %32
  %37 = load i64, ptr %3, align 8, !tbaa !5
  br label %40

38:                                               ; preds = %32
  %39 = load i64, ptr %4, align 8, !tbaa !5
  br label %40

40:                                               ; preds = %38, %36
  %41 = phi i64 [ %37, %36 ], [ %39, %38 ]
  store i64 %41, ptr %3, align 8, !tbaa !5
  br label %42

42:                                               ; preds = %40, %31
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #4
  br label %7, !llvm.loop !9

43:                                               ; preds = %7
  %44 = load i64, ptr %3, align 8, !tbaa !5
  %45 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i64 noundef %44)
  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
}

; 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: nounwind
declare double @sqrt(double noundef) #3

; 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 "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", !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 [5 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) #4
  %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
  %.not9 = icmp eq i64 %4, 0
  br i1 %.not9, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %0, %17
  %.010 = phi i64 [ %.2, %17 ], [ -100000000, %0 ]
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #4
  %6 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %2)
  %7 = load i64, ptr %2, align 8
  %8 = icmp sgt i64 %7, -1
  br i1 %8, label %9, label %15

9:                                                ; preds = %.lr.ph
  %10 = uitofp nneg i64 %7 to double
  %sqrt = call double @llvm.sqrt.f64(double %10)
  %11 = fptosi double %sqrt to i64
  %12 = mul nsw i64 %11, %11
  %13 = icmp slt i64 %12, %7
  %14 = call i64 @llvm.smax.i64(i64 %7, i64 %.010)
  %.1 = select i1 %13, i64 %14, i64 %.010
  br label %17

15:                                               ; preds = %.lr.ph
  %16 = call i64 @llvm.smax.i64(i64 %.010, i64 %7)
  br label %17

17:                                               ; preds = %15, %9
  %.2 = phi i64 [ %.1, %9 ], [ %16, %15 ]
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #4
  %18 = load i64, ptr %1, align 8, !tbaa !5
  %19 = add nsw i64 %18, -1
  store i64 %19, ptr %1, align 8, !tbaa !5
  %.not = icmp eq i64 %18, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %17, %0
  %.0.lcssa = phi i64 [ -100000000, %0 ], [ %.2, %17 ]
  %20 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i64 noundef %.0.lcssa)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %1) #4
  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: 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 i64 @llvm.smax.i64(i64, i64) #3

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare double @llvm.sqrt.f64(double) #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 = !{!"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: AggressiveInstCombinePass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass