; LLVM IR from lzyrapx/Competitive-Programming :: LibreOJ/106（Splay）（104基础上加区间）.ll (Z5NumbXv)

; 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
@qc = external dso_local global i32, align 4
@qv = external dso_local global i32, align 4

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z5RankXiii(i32 noundef, i32 noundef, i32 noundef) #1

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z5NumbXv() #1 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #2
  store i32 0, ptr %1, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #2
  store i32 1000000010, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  br label %5

5:                                                ; preds = %27, %0
  %6 = load i32, ptr %1, align 4, !tbaa !5
  %7 = load i32, ptr %2, align 4, !tbaa !5
  %8 = icmp sle i32 %6, %7
  br i1 %8, label %9, label %28

9:                                                ; preds = %5
  %10 = load i32, ptr %1, align 4, !tbaa !5
  %11 = load i32, ptr %2, align 4, !tbaa !5
  %12 = add nsw i32 %10, %11
  %13 = ashr i32 %12, 1
  store i32 %13, ptr @qc, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  %14 = load i32, ptr @n, align 4, !tbaa !5
  %15 = call noundef i32 @_Z5RankXiii(i32 noundef 1, i32 noundef 1, i32 noundef %14)
  %16 = add nsw i32 %15, 1
  store i32 %16, ptr %4, align 4, !tbaa !5
  %17 = load i32, ptr @qv, align 4, !tbaa !5
  %18 = load i32, ptr %4, align 4, !tbaa !5
  %19 = icmp slt i32 %17, %18
  br i1 %19, label %20, label %23

20:                                               ; preds = %9
  %21 = load i32, ptr @qc, align 4, !tbaa !5
  %22 = sub nsw i32 %21, 1
  store i32 %22, ptr %2, align 4, !tbaa !5
  br label %27

23:                                               ; preds = %9
  %24 = load i32, ptr @qc, align 4, !tbaa !5
  %25 = add nsw i32 %24, 1
  store i32 %25, ptr %1, align 4, !tbaa !5
  %26 = load i32, ptr @qc, align 4, !tbaa !5
  store i32 %26, ptr %3, align 4, !tbaa !5
  br label %27

27:                                               ; preds = %23, %20
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  br label %5, !llvm.loop !9

28:                                               ; preds = %5
  %29 = load i32, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #2
  ret i32 %29
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { 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"}


; 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
@qc = external dso_local local_unnamed_addr global i32, align 4
@qv = external dso_local local_unnamed_addr global i32, align 4

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z5RankXiii(i32 noundef, i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z5NumbXv() local_unnamed_addr #0 {
  br label %1

1:                                                ; preds = %0, %1
  %.013 = phi i32 [ 0, %0 ], [ %.1, %1 ]
  %.0612 = phi i32 [ undef, %0 ], [ %.17, %1 ]
  %.0811 = phi i32 [ 1000000010, %0 ], [ %.19, %1 ]
  %2 = add nsw i32 %.013, %.0811
  %3 = ashr i32 %2, 1
  store i32 %3, ptr @qc, align 4, !tbaa !5
  %4 = load i32, ptr @n, align 4, !tbaa !5
  %5 = tail call noundef i32 @_Z5RankXiii(i32 noundef 1, i32 noundef 1, i32 noundef %4)
  %6 = load i32, ptr @qv, align 4, !tbaa !5
  %.not10 = icmp sgt i32 %6, %5
  %7 = load i32, ptr @qc, align 4
  %8 = add nsw i32 %7, -1
  %9 = add nsw i32 %7, 1
  %.19 = select i1 %.not10, i32 %.0811, i32 %8
  %.17 = select i1 %.not10, i32 %7, i32 %.0612
  %.1 = select i1 %.not10, i32 %9, i32 %.013
  %.not = icmp sgt i32 %.1, %.19
  br i1 %.not, label %10, label %1, !llvm.loop !9

10:                                               ; preds = %1
  ret i32 %.17
}

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" }

!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"}


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