; LLVM IR from lzyrapx/Competitive-Programming :: Retired_code/CDQ Divide and Conquer/HDU 4742（三维偏序）.ll (Z5Cleari)

; 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"

%struct.DP = type { i32, i32 }

@k = external dso_local global i32, align 4
@p = external dso_local global [100010 x %struct.DP], align 16

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #0

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z6lowbiti(i32 noundef) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN2DPC2Eii(ptr noundef nonnull align 4 dereferenceable(8), i32 noundef, i32 noundef) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_Z5Cleari(i32 noundef %0) #3 {
  %2 = alloca i32, align 4
  %3 = alloca %struct.DP, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  br label %4

4:                                                ; preds = %8, %1
  %5 = load i32, ptr %2, align 4, !tbaa !5
  %6 = load i32, ptr @k, align 4, !tbaa !5
  %7 = icmp sle i32 %5, %6
  br i1 %7, label %8, label %16

8:                                                ; preds = %4
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #5
  call void @_ZN2DPC2Eii(ptr noundef nonnull align 4 dereferenceable(8) %3, i32 noundef 0, i32 noundef 0)
  %9 = load i32, ptr %2, align 4, !tbaa !5
  %10 = sext i32 %9 to i64
  %11 = getelementptr inbounds [100010 x %struct.DP], ptr @p, i64 0, i64 %10
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %11, ptr align 4 %3, i64 8, i1 false), !tbaa.struct !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #5
  %12 = load i32, ptr %2, align 4, !tbaa !5
  %13 = call noundef i32 @_Z6lowbiti(i32 noundef %12)
  %14 = load i32, ptr %2, align 4, !tbaa !5
  %15 = add nsw i32 %14, %13
  store i32 %15, ptr %2, align 4, !tbaa !5
  br label %4, !llvm.loop !10

16:                                               ; preds = %4
  ret void
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #4

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #4

attributes #0 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { inlinehint mustprogress 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 #2 = { mustprogress 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 #3 = { 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 #4 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #5 = { 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 = !{i64 0, i64 4, !5, i64 4, i64 4, !5}
!10 = distinct !{!10, !11}
!11 = !{!"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"

%struct.DP = type { i32, i32 }

@k = external dso_local local_unnamed_addr global i32, align 4
@p = external dso_local local_unnamed_addr global [100010 x %struct.DP], align 16

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z6lowbiti(i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN2DPC2Eii(ptr noundef nonnull align 4 dereferenceable(8), i32 noundef, i32 noundef) unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z5Cleari(i32 noundef %0) local_unnamed_addr #1 {
  %2 = alloca %struct.DP, align 8
  %3 = load i32, ptr @k, align 4, !tbaa !5
  %.not4 = icmp slt i32 %3, %0
  br i1 %.not4, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %1, %.lr.ph
  %.05 = phi i32 [ %8, %.lr.ph ], [ %0, %1 ]
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  call void @_ZN2DPC2Eii(ptr noundef nonnull align 4 dereferenceable(8) %2, i32 noundef 0, i32 noundef 0)
  %4 = sext i32 %.05 to i64
  %5 = getelementptr inbounds [100010 x %struct.DP], ptr @p, i64 0, i64 %4
  %6 = load i64, ptr %2, align 8
  store i64 %6, ptr %5, align 8
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  %7 = call noundef i32 @_Z6lowbiti(i32 noundef %.05)
  %8 = add nsw i32 %7, %.05
  %9 = load i32, ptr @k, align 4, !tbaa !5
  %.not = icmp sgt i32 %8, %9
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %1
  ret void
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

attributes #0 = { inlinehint mustprogress 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 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 #2 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GlobalOptPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass