; LLVM IR from tangjz/acm-icpc :: TDL_training/2016-05-22 (H - Wrong Sieve - tjz)

; 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 [3 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 i64, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #3
  %6 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  br label %7

7:                                                ; preds = %38, %0
  %8 = load i32, ptr %2, align 4, !tbaa !5
  %9 = add nsw i32 %8, -1
  store i32 %9, ptr %2, align 4, !tbaa !5
  %10 = icmp ne i32 %8, 0
  br i1 %10, label %11, label %41

11:                                               ; preds = %7
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  %12 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %3)
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  store i32 2, ptr %4, align 4, !tbaa !5
  br label %13

13:                                               ; preds = %34, %11
  %14 = load i32, ptr %4, align 4, !tbaa !5
  %15 = sext i32 %14 to i64
  %16 = load i64, ptr %3, align 8, !tbaa !9
  %17 = icmp sle i64 %15, %16
  br i1 %17, label %19, label %18

18:                                               ; preds = %13
  store i32 4, ptr %5, align 4
  br label %37

19:                                               ; preds = %13
  %20 = load i64, ptr %3, align 8, !tbaa !9
  %21 = load i32, ptr %4, align 4, !tbaa !5
  %22 = sext i32 %21 to i64
  %23 = srem i64 %20, %22
  %24 = icmp ne i64 %23, 0
  br i1 %24, label %25, label %32

25:                                               ; preds = %19
  %26 = load i64, ptr %3, align 8, !tbaa !9
  %27 = load i32, ptr %4, align 4, !tbaa !5
  %28 = sext i32 %27 to i64
  %29 = sdiv i64 %26, %28
  %30 = load i64, ptr %3, align 8, !tbaa !9
  %31 = sub nsw i64 %30, %29
  store i64 %31, ptr %3, align 8, !tbaa !9
  br label %33

32:                                               ; preds = %19
  store i64 -1, ptr %3, align 8, !tbaa !9
  store i32 4, ptr %5, align 4
  br label %37

33:                                               ; preds = %25
  br label %34

34:                                               ; preds = %33
  %35 = load i32, ptr %4, align 4, !tbaa !5
  %36 = add nsw i32 %35, 1
  store i32 %36, ptr %4, align 4, !tbaa !5
  br label %13, !llvm.loop !11

37:                                               ; preds = %32, %18
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  br label %38

38:                                               ; preds = %37
  %39 = load i64, ptr %3, align 8, !tbaa !9
  %40 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i64 noundef %39)
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  br label %7, !llvm.loop !13

41:                                               ; preds = %7
  store i32 0, ptr %1, align 4
  store i32 1, ptr %5, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #3
  %42 = load i32, ptr %1, align 4
  ret i32 %42
}

; 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: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

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

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 = !{!"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"

@.str = external hidden unnamed_addr constant [3 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 i64, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #3
  %3 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %4 = load i32, ptr %1, align 4, !tbaa !5
  %5 = add nsw i32 %4, -1
  store i32 %5, ptr %1, align 4, !tbaa !5
  %.not11 = icmp eq i32 %4, 0
  br i1 %.not11, label %._crit_edge, label %.lr.ph12

.lr.ph12:                                         ; preds = %0, %.loopexit
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  %6 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %2)
  %.promoted = load i64, ptr %2, align 8, !tbaa !9
  %.not79 = icmp slt i64 %.promoted, 2
  br i1 %.not79, label %.loopexit, label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph12, %10
  %indvars.iv = phi i64 [ %indvars.iv.next, %10 ], [ 2, %.lr.ph12 ]
  %7 = phi i64 [ %11, %10 ], [ %.promoted, %.lr.ph12 ]
  %8 = urem i64 %7, %indvars.iv
  %9 = udiv i64 %7, %indvars.iv
  %.not8 = icmp eq i64 %8, 0
  br i1 %.not8, label %12, label %10

10:                                               ; preds = %.lr.ph
  %11 = sub nsw i64 %7, %9
  store i64 %11, ptr %2, align 8, !tbaa !9
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %.not7.not = icmp sgt i64 %11, %indvars.iv
  br i1 %.not7.not, label %.lr.ph, label %.loopexit, !llvm.loop !11

12:                                               ; preds = %.lr.ph
  store i64 -1, ptr %2, align 8, !tbaa !9
  br label %.loopexit

.loopexit:                                        ; preds = %10, %.lr.ph12, %12
  %13 = phi i64 [ %.promoted, %.lr.ph12 ], [ -1, %12 ], [ %11, %10 ]
  %14 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i64 noundef %13)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  %15 = load i32, ptr %1, align 4, !tbaa !5
  %16 = add nsw i32 %15, -1
  store i32 %16, ptr %1, align 4, !tbaa !5
  %.not = icmp eq i32 %15, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph12, !llvm.loop !13

._crit_edge:                                      ; preds = %.loopexit, %0
  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: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

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 = !{!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: CorrelatedValuePropagationPass,DivRemPairsPass,EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass