; LLVM IR from tangjz/acm-icpc :: codeforces/gym (101064K)

; 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"

@n = external dso_local global i32, align 4
@m = external dso_local global i32, align 4
@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = 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 double, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #4
  store double 0.000000e+00, ptr %2, align 8, !tbaa !5
  %3 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef @n)
  store i32 1, ptr @m, align 4, !tbaa !9
  br label %4

4:                                                ; preds = %26, %0
  %5 = load i32, ptr @m, align 4, !tbaa !9
  %6 = load i32, ptr @n, align 4, !tbaa !9
  %7 = icmp sle i32 %5, %6
  br i1 %7, label %8, label %29

8:                                                ; preds = %4
  %9 = load i32, ptr @n, align 4, !tbaa !9
  %10 = add nsw i32 %9, 1
  %11 = load i32, ptr @m, align 4, !tbaa !9
  %12 = sub nsw i32 %10, %11
  %13 = sitofp i32 %12 to double
  %14 = call double @log(double noundef %13) #4
  %15 = load i32, ptr @n, align 4, !tbaa !9
  %16 = sitofp i32 %15 to double
  %17 = call double @log(double noundef %16) #4
  %18 = fsub double %14, %17
  %19 = load double, ptr %2, align 8, !tbaa !5
  %20 = fadd double %19, %18
  store double %20, ptr %2, align 8, !tbaa !5
  %21 = load double, ptr %2, align 8, !tbaa !5
  %22 = call double @exp(double noundef %21) #4
  %23 = fcmp olt double %22, 0x3FE0000000000009
  br i1 %23, label %24, label %25

24:                                               ; preds = %8
  br label %29

25:                                               ; preds = %8
  br label %26

26:                                               ; preds = %25
  %27 = load i32, ptr @m, align 4, !tbaa !9
  %28 = add nsw i32 %27, 1
  store i32 %28, ptr @m, align 4, !tbaa !9
  br label %4, !llvm.loop !11

29:                                               ; preds = %24, %4
  %30 = load i32, ptr @m, align 4, !tbaa !9
  %31 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i32 noundef %30)
  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 @log(double noundef) #3

; Function Attrs: nounwind
declare double @exp(double noundef) #3

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 "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 = !{!"double", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !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"

@n = external dso_local global i32, align 4
@m = external dso_local local_unnamed_addr global i32, align 4
@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = 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 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull @n)
  store i32 1, ptr @m, align 4, !tbaa !5
  %2 = load i32, ptr @n, align 4, !tbaa !5
  %.not4 = icmp slt i32 %2, 1
  br i1 %.not4, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %0, %15
  %3 = phi i32 [ %17, %15 ], [ %2, %0 ]
  %.06 = phi double [ %12, %15 ], [ 0.000000e+00, %0 ]
  %storemerge5.neg = phi i32 [ %.neg, %15 ], [ -1, %0 ]
  %4 = add i32 %storemerge5.neg, 1
  %5 = add i32 %4, %3
  %6 = sitofp i32 %5 to double
  %7 = tail call double @log(double noundef %6) #3
  %8 = load i32, ptr @n, align 4, !tbaa !5
  %9 = sitofp i32 %8 to double
  %10 = tail call double @log(double noundef %9) #3
  %11 = fsub double %7, %10
  %12 = fadd double %.06, %11
  %13 = tail call double @exp(double noundef %12) #3
  %14 = fcmp olt double %13, 0x3FE0000000000009
  %.pre.pre = load i32, ptr @m, align 4, !tbaa !5
  br i1 %14, label %._crit_edge, label %15

15:                                               ; preds = %.lr.ph
  %.neg = xor i32 %.pre.pre, -1
  %16 = add nsw i32 %.pre.pre, 1
  store i32 %16, ptr @m, align 4, !tbaa !5
  %17 = load i32, ptr @n, align 4, !tbaa !5
  %.not.not = icmp slt i32 %.pre.pre, %17
  br i1 %.not.not, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %15, %.lr.ph, %0
  %18 = phi i32 [ 1, %0 ], [ %16, %15 ], [ %.pre.pre, %.lr.ph ]
  %19 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %18)
  ret i32 0
}

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

; Function Attrs: mustprogress nofree nounwind willreturn memory(write)
declare double @log(double noundef) local_unnamed_addr #2

; Function Attrs: mustprogress nofree nounwind willreturn memory(write)
declare double @exp(double noundef) local_unnamed_addr #2

; 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" }
attributes #2 = { mustprogress nofree nounwind willreturn memory(write) "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,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass