; LLVM IR from lzyrapx/Competitive-Programming :: HDUOJ (2051)

; 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 [2 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 i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca [100 x i32], align 16
  %7 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #4
  call void @llvm.lifetime.start.p0(i64 400, ptr %6) #4
  call void @llvm.memset.p0.i64(ptr align 16 %6, i8 0, i64 400, i1 false)
  br label %8

8:                                                ; preds = %41, %0
  %9 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %3)
  %10 = icmp ne i32 %9, -1
  br i1 %10, label %11, label %43

11:                                               ; preds = %8
  store i32 0, ptr %2, align 4, !tbaa !5
  br label %12

12:                                               ; preds = %15, %11
  %13 = load i32, ptr %3, align 4, !tbaa !5
  %14 = icmp ne i32 %13, 0
  br i1 %14, label %15, label %25

15:                                               ; preds = %12
  %16 = load i32, ptr %3, align 4, !tbaa !5
  %17 = srem i32 %16, 2
  %18 = load i32, ptr %2, align 4, !tbaa !5
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds [100 x i32], ptr %6, i64 0, i64 %19
  store i32 %17, ptr %20, align 4, !tbaa !5
  %21 = load i32, ptr %2, align 4, !tbaa !5
  %22 = add nsw i32 %21, 1
  store i32 %22, ptr %2, align 4, !tbaa !5
  %23 = load i32, ptr %3, align 4, !tbaa !5
  %24 = sdiv i32 %23, 2
  store i32 %24, ptr %3, align 4, !tbaa !5
  br label %12, !llvm.loop !9

25:                                               ; preds = %12
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #4
  %26 = load i32, ptr %2, align 4, !tbaa !5
  %27 = sub nsw i32 %26, 1
  store i32 %27, ptr %7, align 4, !tbaa !5
  br label %28

28:                                               ; preds = %38, %25
  %29 = load i32, ptr %7, align 4, !tbaa !5
  %30 = icmp sge i32 %29, 0
  br i1 %30, label %32, label %31

31:                                               ; preds = %28
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #4
  br label %41

32:                                               ; preds = %28
  %33 = load i32, ptr %7, align 4, !tbaa !5
  %34 = sext i32 %33 to i64
  %35 = getelementptr inbounds [100 x i32], ptr %6, i64 0, i64 %34
  %36 = load i32, ptr %35, align 4, !tbaa !5
  %37 = call i32 (ptr, ...) @printf(ptr noundef @.str, i32 noundef %36)
  br label %38

38:                                               ; preds = %32
  %39 = load i32, ptr %7, align 4, !tbaa !5
  %40 = add nsw i32 %39, -1
  store i32 %40, ptr %7, align 4, !tbaa !5
  br label %28, !llvm.loop !11

41:                                               ; preds = %31
  %42 = call i32 (ptr, ...) @printf(ptr noundef @.str.1)
  br label %8, !llvm.loop !12

43:                                               ; preds = %8
  call void @llvm.lifetime.end.p0(i64 400, ptr %6) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #4
  call void @llvm.lifetime.end.p0(i64 4, 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

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

declare i32 @__isoc99_scanf(ptr noundef, ...) #3

declare i32 @printf(ptr noundef, ...) #3

; 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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #3 = { "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 = !{!"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 = distinct !{!12, !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"

@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [2 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 [100 x i32], align 16
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #4
  call void @llvm.lifetime.start.p0(i64 400, ptr nonnull %2) #4
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(400) %2, i8 0, i64 400, i1 false)
  %3 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %.not13 = icmp eq i32 %3, -1
  br i1 %.not13, label %._crit_edge14, label %thread-pre-split

thread-pre-split:                                 ; preds = %0, %._crit_edge
  %.pr = load i32, ptr %1, align 4, !tbaa !5
  %.not89 = icmp eq i32 %.pr, 0
  br i1 %.not89, label %._crit_edge, label %.lr.ph

.preheader:                                       ; preds = %.lr.ph
  %4 = trunc nuw i64 %indvars.iv.next to i32
  store i32 %10, ptr %1, align 4, !tbaa !5
  %5 = icmp sgt i32 %4, 0
  br i1 %5, label %.lr.ph12.preheader, label %._crit_edge

.lr.ph12.preheader:                               ; preds = %.preheader
  %6 = and i64 %indvars.iv.next, 2147483647
  br label %.lr.ph12

.lr.ph:                                           ; preds = %thread-pre-split, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %thread-pre-split ]
  %7 = phi i32 [ %10, %.lr.ph ], [ %.pr, %thread-pre-split ]
  %8 = srem i32 %7, 2
  %9 = getelementptr inbounds [100 x i32], ptr %2, i64 0, i64 %indvars.iv
  store i32 %8, ptr %9, align 4, !tbaa !5
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %10 = sdiv i32 %7, 2
  %.off = add i32 %7, 1
  %.not8 = icmp ult i32 %.off, 3
  br i1 %.not8, label %.preheader, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph12, %thread-pre-split, %.preheader
  %11 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1)
  %12 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %.not = icmp eq i32 %12, -1
  br i1 %.not, label %._crit_edge14, label %thread-pre-split, !llvm.loop !11

.lr.ph12:                                         ; preds = %.lr.ph12.preheader, %.lr.ph12
  %indvars.iv17 = phi i64 [ %6, %.lr.ph12.preheader ], [ %indvars.iv.next18, %.lr.ph12 ]
  %indvars.iv.next18 = add nsw i64 %indvars.iv17, -1
  %13 = getelementptr inbounds [100 x i32], ptr %2, i64 0, i64 %indvars.iv.next18
  %14 = load i32, ptr %13, align 4, !tbaa !5
  %15 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, i32 noundef %14)
  %16 = icmp ugt i64 %indvars.iv17, 1
  br i1 %16, label %.lr.ph12, label %._crit_edge, !llvm.loop !12

._crit_edge14:                                    ; preds = %._crit_edge, %0
  call void @llvm.lifetime.end.p0(i64 400, ptr nonnull %2) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #4
  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: mustprogress nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #3

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #3

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #3 = { 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 #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 = !{!"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 = distinct !{!12, !10}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass