; LLVM IR from Shah-Shishir/Codeforces-Solutions :: 675A. Infinite Sequence (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 [9 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [4 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 double, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  br label %6

6:                                                ; preds = %43, %0
  %7 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2, ptr noundef %3, ptr noundef %4)
  %8 = icmp ne i32 %7, -1
  br i1 %8, label %9, label %44

9:                                                ; preds = %6
  %10 = load i32, ptr %4, align 4, !tbaa !5
  %11 = icmp eq i32 %10, 0
  br i1 %11, label %12, label %21

12:                                               ; preds = %9
  %13 = load i32, ptr %2, align 4, !tbaa !5
  %14 = load i32, ptr %3, align 4, !tbaa !5
  %15 = icmp eq i32 %13, %14
  br i1 %15, label %16, label %18

16:                                               ; preds = %12
  %17 = call i32 (ptr, ...) @printf(ptr noundef @.str.1)
  br label %20

18:                                               ; preds = %12
  %19 = call i32 (ptr, ...) @printf(ptr noundef @.str.2)
  br label %20

20:                                               ; preds = %18, %16
  br label %43

21:                                               ; preds = %9
  %22 = load i32, ptr %3, align 4, !tbaa !5
  %23 = load i32, ptr %2, align 4, !tbaa !5
  %24 = sub nsw i32 %22, %23
  %25 = sitofp i32 %24 to double
  %26 = load i32, ptr %4, align 4, !tbaa !5
  %27 = sitofp i32 %26 to double
  %28 = fdiv double %25, %27
  %29 = fadd double %28, 1.000000e+00
  store double %29, ptr %5, align 8, !tbaa !9
  %30 = load double, ptr %5, align 8, !tbaa !9
  %31 = fcmp ole double %30, 0.000000e+00
  br i1 %31, label %38, label %32

32:                                               ; preds = %21
  %33 = load double, ptr %5, align 8, !tbaa !9
  %34 = load double, ptr %5, align 8, !tbaa !9
  %35 = fptosi double %34 to i32
  %36 = sitofp i32 %35 to double
  %37 = fcmp une double %33, %36
  br i1 %37, label %38, label %40

38:                                               ; preds = %32, %21
  %39 = call i32 (ptr, ...) @printf(ptr noundef @.str.2)
  br label %42

40:                                               ; preds = %32
  %41 = call i32 (ptr, ...) @printf(ptr noundef @.str.1)
  br label %42

42:                                               ; preds = %40, %38
  br label %43

43:                                               ; preds = %42, %20
  br label %6, !llvm.loop !11

44:                                               ; preds = %6
  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

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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"double", !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 [9 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [4 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
  %3 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #3
  %4 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1, ptr noundef nonnull %2, ptr noundef nonnull %3)
  %.not4 = icmp eq i32 %4, -1
  br i1 %.not4, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %0, %25
  %5 = load i32, ptr %3, align 4, !tbaa !5
  %6 = icmp eq i32 %5, 0
  br i1 %6, label %7, label %11

7:                                                ; preds = %.lr.ph
  %8 = load i32, ptr %1, align 4, !tbaa !5
  %9 = load i32, ptr %2, align 4, !tbaa !5
  %10 = icmp eq i32 %8, %9
  %.str.1..str.2 = select i1 %10, ptr @.str.1, ptr @.str.2
  br label %25

11:                                               ; preds = %.lr.ph
  %12 = load i32, ptr %2, align 4, !tbaa !5
  %13 = load i32, ptr %1, align 4, !tbaa !5
  %14 = sub nsw i32 %12, %13
  %15 = sitofp i32 %14 to double
  %16 = sitofp i32 %5 to double
  %17 = fdiv double %15, %16
  %18 = fadd double %17, 1.000000e+00
  %19 = fcmp ugt double %18, 0.000000e+00
  br i1 %19, label %20, label %25

20:                                               ; preds = %11
  %21 = fptosi double %18 to i32
  %22 = sitofp i32 %21 to double
  %23 = fcmp une double %18, %22
  br i1 %23, label %25, label %24

24:                                               ; preds = %20
  br label %25

25:                                               ; preds = %11, %20, %7, %24
  %.str.2.sink = phi ptr [ @.str.1, %24 ], [ %.str.1..str.2, %7 ], [ @.str.2, %20 ], [ @.str.2, %11 ]
  %26 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) %.str.2.sink)
  %27 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1, ptr noundef nonnull %2, ptr noundef nonnull %3)
  %.not = icmp eq i32 %27, -1
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %25, %0
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #3
  call void @llvm.lifetime.end.p0(i64 4, 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 @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 = !{!"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: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass