; LLVM IR from tangjz/acm-icpc :: poj (3002)

; 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
@n = external dso_local global i32, align 4
@now = external dso_local global i64, align 8
@ans = external dso_local global i64, align 8
@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [6 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [7 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [21 x i8], align 1

; Function Attrs: mustprogress uwtable
declare dso_local noundef i64 @_Z3gcdxx(i64 noundef, i64 noundef) #0

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #1 {
  %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 = %31, %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 %32

7:                                                ; preds = %3
  store i64 1, ptr @ans, align 8, !tbaa !9
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef @n)
  br label %9

9:                                                ; preds = %13, %7
  %10 = load i32, ptr @n, align 4, !tbaa !5
  %11 = add nsw i32 %10, -1
  store i32 %11, ptr @n, align 4, !tbaa !5
  %12 = icmp ne i32 %10, 0
  br i1 %12, label %13, label %22

13:                                               ; preds = %9
  %14 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef @now)
  %15 = load i64, ptr @now, align 8, !tbaa !9
  %16 = load i64, ptr @ans, align 8, !tbaa !9
  %17 = load i64, ptr @now, align 8, !tbaa !9
  %18 = call noundef i64 @_Z3gcdxx(i64 noundef %16, i64 noundef %17)
  %19 = sdiv i64 %15, %18
  %20 = load i64, ptr @ans, align 8, !tbaa !9
  %21 = mul nsw i64 %20, %19
  store i64 %21, ptr @ans, align 8, !tbaa !9
  br label %9, !llvm.loop !11

22:                                               ; preds = %9
  %23 = load i64, ptr @ans, align 8, !tbaa !9
  %24 = sitofp i64 %23 to double
  %25 = fcmp ole double %24, 1.000000e+09
  br i1 %25, label %26, label %29

26:                                               ; preds = %22
  %27 = load i64, ptr @ans, align 8, !tbaa !9
  %28 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i64 noundef %27)
  br label %31

29:                                               ; preds = %22
  %30 = call i32 @puts(ptr noundef @.str.3)
  br label %31

31:                                               ; preds = %29, %26
  br label %3, !llvm.loop !13

32:                                               ; preds = %3
  ret i32 0
}

declare i32 @__isoc99_scanf(ptr noundef, ...) #2

declare i32 @printf(ptr noundef, ...) #2

declare i32 @puts(ptr noundef) #2

attributes #0 = { mustprogress 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 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 #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" }

!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 = !{!"long long", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}


; 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
@n = external dso_local global i32, align 4
@now = external dso_local global i64, align 8
@ans = external dso_local local_unnamed_addr global i64, align 8
@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [6 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [7 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [21 x i8], align 1

; Function Attrs: mustprogress uwtable
declare dso_local noundef i64 @_Z3gcdxx(i64 noundef, i64 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #1 {
  %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
  %.not3 = icmp eq i32 %2, 0
  br i1 %.not3, label %._crit_edge6, label %.lr.ph5

.lr.ph5:                                          ; preds = %0, %22
  store i64 1, ptr @ans, align 8, !tbaa !9
  %4 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull @n)
  %5 = load i32, ptr @n, align 4, !tbaa !5
  %6 = add nsw i32 %5, -1
  store i32 %6, ptr @n, align 4, !tbaa !5
  %.not12 = icmp eq i32 %5, 0
  br i1 %.not12, label %.lr.ph5.._crit_edge_crit_edge, label %.lr.ph

.lr.ph5.._crit_edge_crit_edge:                    ; preds = %.lr.ph5
  %.pre = load i64, ptr @ans, align 8, !tbaa !9
  br label %._crit_edge

.lr.ph:                                           ; preds = %.lr.ph5, %.lr.ph
  %7 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull @now)
  %8 = load i64, ptr @now, align 8, !tbaa !9
  %9 = load i64, ptr @ans, align 8, !tbaa !9
  %10 = tail call noundef i64 @_Z3gcdxx(i64 noundef %9, i64 noundef %8)
  %11 = sdiv i64 %8, %10
  %12 = load i64, ptr @ans, align 8, !tbaa !9
  %13 = mul nsw i64 %12, %11
  store i64 %13, ptr @ans, align 8, !tbaa !9
  %14 = load i32, ptr @n, align 4, !tbaa !5
  %15 = add nsw i32 %14, -1
  store i32 %15, ptr @n, align 4, !tbaa !5
  %.not1 = icmp eq i32 %14, 0
  br i1 %.not1, label %._crit_edge, label %.lr.ph, !llvm.loop !11

._crit_edge:                                      ; preds = %.lr.ph, %.lr.ph5.._crit_edge_crit_edge
  %16 = phi i64 [ %.pre, %.lr.ph5.._crit_edge_crit_edge ], [ %13, %.lr.ph ]
  %17 = icmp slt i64 %16, 1000000001
  br i1 %17, label %18, label %20

18:                                               ; preds = %._crit_edge
  %19 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i64 noundef %16)
  br label %22

20:                                               ; preds = %._crit_edge
  %21 = tail call i32 @puts(ptr noundef nonnull dereferenceable(1) @.str.3)
  br label %22

22:                                               ; preds = %20, %18
  %23 = load i32, ptr @t, align 4, !tbaa !5
  %24 = add nsw i32 %23, -1
  store i32 %24, ptr @t, align 4, !tbaa !5
  %.not = icmp eq i32 %23, 0
  br i1 %.not, label %._crit_edge6, label %.lr.ph5, !llvm.loop !13

._crit_edge6:                                     ; preds = %22, %0
  ret i32 0
}

; 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: nofree nounwind
declare noundef i32 @puts(ptr nocapture noundef readonly) local_unnamed_addr #2

attributes #0 = { mustprogress 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 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 #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" }

!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 = !{!"long long", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass