; LLVM IR from tangjz/acm-icpc :: lydsy (2296)

; 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
@x = external dso_local global i32, align 4
@y = external dso_local global i64, align 8
@z = 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 [3 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [6 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 = %37, %11, %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, ptr noundef @x)
  %9 = load i32, ptr @x, align 4, !tbaa !5
  %10 = icmp ne i32 %9, 0
  br i1 %10, label %13, label %11

11:                                               ; preds = %7
  %12 = call i32 @puts(ptr noundef @.str.1)
  br label %3, !llvm.loop !9

13:                                               ; preds = %7
  store i64 1, ptr @z, align 8, !tbaa !11
  br label %14

14:                                               ; preds = %20, %13
  %15 = load i64, ptr @z, align 8, !tbaa !11
  %16 = load i32, ptr @x, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = icmp sle i64 %15, %17
  br i1 %18, label %19, label %23

19:                                               ; preds = %14
  br label %20

20:                                               ; preds = %19
  %21 = load i64, ptr @z, align 8, !tbaa !11
  %22 = mul nsw i64 %21, 10
  store i64 %22, ptr @z, align 8, !tbaa !11
  br label %14, !llvm.loop !13

23:                                               ; preds = %14
  %24 = load i64, ptr @z, align 8, !tbaa !11
  %25 = mul nsw i64 1234567890, %24
  store i64 %25, ptr @y, align 8, !tbaa !11
  %26 = load i64, ptr @y, align 8, !tbaa !11
  %27 = load i32, ptr @x, align 4, !tbaa !5
  %28 = sext i32 %27 to i64
  %29 = srem i64 %26, %28
  store i64 %29, ptr @z, align 8, !tbaa !11
  %30 = load i64, ptr @z, align 8, !tbaa !11
  %31 = icmp ne i64 %30, 0
  br i1 %31, label %32, label %37

32:                                               ; preds = %23
  %33 = load i32, ptr @x, align 4, !tbaa !5
  %34 = sext i32 %33 to i64
  %35 = load i64, ptr @z, align 8, !tbaa !11
  %36 = sub nsw i64 %34, %35
  store i64 %36, ptr @z, align 8, !tbaa !11
  br label %37

37:                                               ; preds = %32, %23
  %38 = load i64, ptr @y, align 8, !tbaa !11
  %39 = load i64, ptr @z, align 8, !tbaa !11
  %40 = add nsw i64 %38, %39
  %41 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i64 noundef %40)
  br label %3, !llvm.loop !9

42:                                               ; preds = %3
  ret i32 0
}

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

declare i32 @puts(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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!12, !12, i64 0}
!12 = !{!"long long", !7, i64 0}
!13 = distinct !{!13, !10}


; 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
@x = external dso_local global i32, align 4
@y = external dso_local local_unnamed_addr global i64, align 8
@z = 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 [3 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [6 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
  %.not11 = icmp eq i32 %2, 0
  br i1 %.not11, label %._crit_edge14, label %.lr.ph13

.lr.ph13:                                         ; preds = %0, %.backedge
  %4 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull @x)
  %5 = load i32, ptr @x, align 4, !tbaa !5
  %.not2 = icmp eq i32 %5, 0
  br i1 %.not2, label %7, label %.preheader

.preheader:                                       ; preds = %.lr.ph13
  %6 = sext i32 %5 to i64
  %.not37 = icmp slt i32 %5, 1
  br i1 %.not37, label %._crit_edge, label %.lr.ph

7:                                                ; preds = %.lr.ph13
  %8 = tail call i32 @puts(ptr noundef nonnull dereferenceable(1) @.str.1)
  br label %.backedge

.backedge:                                        ; preds = %7, %._crit_edge
  %9 = load i32, ptr @t, align 4, !tbaa !5
  %10 = add nsw i32 %9, -1
  store i32 %10, ptr @t, align 4, !tbaa !5
  %.not = icmp eq i32 %9, 0
  br i1 %.not, label %._crit_edge14, label %.lr.ph13, !llvm.loop !9

.lr.ph:                                           ; preds = %.preheader, %.lr.ph
  %storemerge8 = phi i64 [ %11, %.lr.ph ], [ 1, %.preheader ]
  %11 = mul nuw nsw i64 %storemerge8, 10
  %.not3 = icmp sgt i64 %11, %6
  br i1 %.not3, label %._crit_edge, label %.lr.ph, !llvm.loop !11

._crit_edge:                                      ; preds = %.lr.ph, %.preheader
  %storemerge.lcssa6 = phi i64 [ 1, %.preheader ], [ %11, %.lr.ph ]
  %12 = mul nuw nsw i64 %storemerge.lcssa6, 1234567890
  store i64 %12, ptr @y, align 8, !tbaa !12
  %13 = srem i64 %12, %6
  %.not4 = icmp eq i64 %13, 0
  %14 = sub nsw i64 %6, %13
  %spec.select = select i1 %.not4, i64 0, i64 %14
  store i64 %spec.select, ptr @z, align 8, !tbaa !12
  %15 = add nsw i64 %spec.select, %12
  %16 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i64 noundef %15)
  br label %.backedge

._crit_edge14:                                    ; preds = %.backedge, %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 @puts(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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}
!12 = !{!13, !13, i64 0}
!13 = !{!"long long", !7, i64 0}


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