; LLVM IR from VastoLorde95/Competitive-Programming :: Codeforces/69 Beta Division 1/Problem B (B)

; 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"

@t = external dso_local global i32, align 4
@a = external dso_local global double, align 8
@b = external dso_local global double, align 8
@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [7 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [7 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #0 {
  %1 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  %2 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef @t)
  br label %3

3:                                                ; preds = %41, %0
  %4 = load i32, ptr @t, align 4, !tbaa !5
  %5 = add nsw i32 %4, -1
  store i32 %5, ptr @t, align 4, !tbaa !5
  %6 = icmp ne i32 %4, 0
  br i1 %6, label %7, label %42

7:                                                ; preds = %3
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef @a, ptr noundef @b)
  %9 = load double, ptr @b, align 8, !tbaa !9
  %10 = fcmp oeq double %9, 0.000000e+00
  br i1 %10, label %11, label %13

11:                                               ; preds = %7
  %12 = call i32 (ptr, ...) @printf(ptr noundef @.str.2)
  br label %41

13:                                               ; preds = %7
  %14 = load double, ptr @a, align 8, !tbaa !9
  %15 = fcmp oeq double %14, 0.000000e+00
  br i1 %15, label %16, label %18

16:                                               ; preds = %13
  %17 = call i32 (ptr, ...) @printf(ptr noundef @.str.3)
  br label %40

18:                                               ; preds = %13
  %19 = load double, ptr @b, align 8, !tbaa !9
  %20 = fmul double 4.000000e+00, %19
  %21 = load double, ptr @a, align 8, !tbaa !9
  %22 = fcmp ole double %20, %21
  br i1 %22, label %23, label %30

23:                                               ; preds = %18
  %24 = load double, ptr @a, align 8, !tbaa !9
  %25 = load double, ptr @b, align 8, !tbaa !9
  %26 = fsub double %24, %25
  %27 = load double, ptr @a, align 8, !tbaa !9
  %28 = fdiv double %26, %27
  %29 = call i32 (ptr, ...) @printf(ptr noundef @.str.4, double noundef %28)
  br label %39

30:                                               ; preds = %18
  %31 = load double, ptr @a, align 8, !tbaa !9
  %32 = fdiv double %31, 8.000000e+00
  %33 = load double, ptr @b, align 8, !tbaa !9
  %34 = fadd double %32, %33
  %35 = load double, ptr @b, align 8, !tbaa !9
  %36 = fmul double 2.000000e+00, %35
  %37 = fdiv double %34, %36
  %38 = call i32 (ptr, ...) @printf(ptr noundef @.str.4, double noundef %37)
  br label %39

39:                                               ; preds = %30, %23
  br label %40

40:                                               ; preds = %39, %16
  br label %41

41:                                               ; preds = %40, %11
  br label %3, !llvm.loop !11

42:                                               ; preds = %3
  ret i32 0
}

declare i32 @__isoc99_scanf(ptr noundef, ...) #1

declare i32 @printf(ptr noundef, ...) #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 = { "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" }

!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"

@t = external dso_local global i32, align 4
@a = external dso_local global double, align 8
@b = external dso_local global double, align 8
@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [7 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [7 x i8], align 1

; Function Attrs: mustprogress nofree norecurse nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull @t)
  %2 = load i32, ptr @t, align 4, !tbaa !5
  %3 = add nsw i32 %2, -1
  store i32 %3, ptr @t, align 4, !tbaa !5
  %.not2 = icmp eq i32 %2, 0
  br i1 %.not2, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %0, %27
  %4 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull @a, ptr noundef nonnull @b)
  %5 = load double, ptr @b, align 8, !tbaa !9
  %6 = fcmp oeq double %5, 0.000000e+00
  br i1 %6, label %7, label %9

7:                                                ; preds = %.lr.ph
  %8 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2)
  br label %27

9:                                                ; preds = %.lr.ph
  %10 = load double, ptr @a, align 8, !tbaa !9
  %11 = fcmp oeq double %10, 0.000000e+00
  br i1 %11, label %12, label %14

12:                                               ; preds = %9
  %13 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.3)
  br label %27

14:                                               ; preds = %9
  %15 = fmul double %5, 4.000000e+00
  %16 = fcmp ugt double %15, %10
  br i1 %16, label %21, label %17

17:                                               ; preds = %14
  %18 = fsub double %10, %5
  %19 = fdiv double %18, %10
  %20 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.4, double noundef %19)
  br label %27

21:                                               ; preds = %14
  %22 = fmul double %10, 1.250000e-01
  %23 = fadd double %5, %22
  %24 = fmul double %5, 2.000000e+00
  %25 = fdiv double %23, %24
  %26 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.4, double noundef %25)
  br label %27

27:                                               ; preds = %12, %21, %17, %7
  %28 = load i32, ptr @t, align 4, !tbaa !5
  %29 = add nsw i32 %28, -1
  store i32 %29, ptr @t, align 4, !tbaa !5
  %.not = icmp eq i32 %28, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !11

._crit_edge:                                      ; preds = %27, %0
  ret i32 0
}

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #1

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #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 = { 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" }

!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"}


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