; LLVM IR from tangjz/acm-icpc :: luogu/1270.ll (Z9make_treev)

; 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
@t = external dso_local global [101 x i32], align 16
@v = external dso_local global [101 x i32], align 16
@l = external dso_local global [101 x i32], align 16
@r = external dso_local global [101 x i32], align 16
@.str = external hidden unnamed_addr constant [5 x i8], align 1

; Function Attrs: mustprogress uwtable
define dso_local void @_Z9make_treev() #0 {
  %1 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #3
  %2 = load i32, ptr @n, align 4, !tbaa !5
  %3 = add nsw i32 %2, 1
  store i32 %3, ptr @n, align 4, !tbaa !5
  store i32 %3, ptr %1, align 4, !tbaa !5
  %4 = load i32, ptr %1, align 4, !tbaa !5
  %5 = sext i32 %4 to i64
  %6 = getelementptr inbounds [101 x i32], ptr @t, i64 0, i64 %5
  %7 = load i32, ptr %1, align 4, !tbaa !5
  %8 = sext i32 %7 to i64
  %9 = getelementptr inbounds [101 x i32], ptr @v, i64 0, i64 %8
  %10 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %6, ptr noundef %9)
  %11 = load i32, ptr %1, align 4, !tbaa !5
  %12 = sext i32 %11 to i64
  %13 = getelementptr inbounds [101 x i32], ptr @v, i64 0, i64 %12
  %14 = load i32, ptr %13, align 4, !tbaa !5
  %15 = icmp ne i32 %14, 0
  br i1 %15, label %27, label %16

16:                                               ; preds = %0
  %17 = load i32, ptr @n, align 4, !tbaa !5
  %18 = add nsw i32 %17, 1
  %19 = load i32, ptr %1, align 4, !tbaa !5
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds [101 x i32], ptr @l, i64 0, i64 %20
  store i32 %18, ptr %21, align 4, !tbaa !5
  call void @_Z9make_treev()
  %22 = load i32, ptr @n, align 4, !tbaa !5
  %23 = add nsw i32 %22, 1
  %24 = load i32, ptr %1, align 4, !tbaa !5
  %25 = sext i32 %24 to i64
  %26 = getelementptr inbounds [101 x i32], ptr @r, i64 0, i64 %25
  store i32 %23, ptr %26, align 4, !tbaa !5
  call void @_Z9make_treev()
  br label %27

27:                                               ; preds = %16, %0
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #3
  ret void
}

; 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

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 = { 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"}


; 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 local_unnamed_addr global i32, align 4
@t = external dso_local global [101 x i32], align 16
@v = external dso_local global [101 x i32], align 16
@l = external dso_local local_unnamed_addr global [101 x i32], align 16
@r = external dso_local local_unnamed_addr global [101 x i32], align 16
@.str = external hidden unnamed_addr constant [5 x i8], align 1

; Function Attrs: mustprogress nofree nounwind uwtable
define dso_local void @_Z9make_treev() local_unnamed_addr #0 {
  %1 = load i32, ptr @n, align 4, !tbaa !5
  %2 = add nsw i32 %1, 1
  store i32 %2, ptr @n, align 4, !tbaa !5
  %3 = sext i32 %2 to i64
  %4 = getelementptr inbounds [101 x i32], ptr @t, i64 0, i64 %3
  %5 = getelementptr inbounds [101 x i32], ptr @v, i64 0, i64 %3
  %6 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %4, ptr noundef nonnull %5)
  %7 = load i32, ptr %5, align 4, !tbaa !5
  %.not5 = icmp eq i32 %7, 0
  br i1 %.not5, label %tailrecurse, label %tailrecurse._crit_edge

tailrecurse:                                      ; preds = %0, %tailrecurse
  %8 = phi i64 [ %15, %tailrecurse ], [ %3, %0 ]
  %9 = load i32, ptr @n, align 4, !tbaa !5
  %10 = add nsw i32 %9, 1
  %11 = getelementptr inbounds [101 x i32], ptr @l, i64 0, i64 %8
  store i32 %10, ptr %11, align 4, !tbaa !5
  tail call void @_Z9make_treev()
  %12 = load i32, ptr @n, align 4, !tbaa !5
  %13 = add nsw i32 %12, 1
  %14 = getelementptr inbounds [101 x i32], ptr @r, i64 0, i64 %8
  store i32 %13, ptr %14, align 4, !tbaa !5
  store i32 %13, ptr @n, align 4, !tbaa !5
  %15 = sext i32 %13 to i64
  %16 = getelementptr inbounds [101 x i32], ptr @t, i64 0, i64 %15
  %17 = getelementptr inbounds [101 x i32], ptr @v, i64 0, i64 %15
  %18 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %16, ptr noundef nonnull %17)
  %19 = load i32, ptr %17, align 4, !tbaa !5
  %.not = icmp eq i32 %19, 0
  br i1 %.not, label %tailrecurse, label %tailrecurse._crit_edge

tailrecurse._crit_edge:                           ; preds = %tailrecurse, %0
  ret void
}

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

attributes #0 = { mustprogress nofree 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"}


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