; LLVM IR from PaddlePaddle/Paddle :: paddle/pir/src/core/value.ll (ZNK3pir5Value9use_countEv)

; 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"

%"class.pir::ValueUseIterator" = type { %"class.pir::OpOperand" }
%"class.pir::OpOperand" = type { ptr }

; 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 ptr @_ZNK3pir5Value9use_beginEv(ptr noundef nonnull align 8 dereferenceable(8)) #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local ptr @_ZNK3pir5Value7use_endEv(ptr noundef nonnull align 8 dereferenceable(8)) #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef i64 @_ZNK3pir5Value9use_countEv(ptr noundef nonnull align 8 dereferenceable(8) %0) #1 align 2 {
  %2 = alloca ptr, align 8
  %3 = alloca i64, align 8
  %4 = alloca %"class.pir::ValueUseIterator", align 8
  %5 = alloca %"class.pir::ValueUseIterator", align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %6 = load ptr, ptr %2, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #2
  store i64 0, ptr %3, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #2
  %7 = call ptr @_ZNK3pir5Value9use_beginEv(ptr noundef nonnull align 8 dereferenceable(8) %6)
  %8 = getelementptr inbounds %"class.pir::ValueUseIterator", ptr %4, i32 0, i32 0
  %9 = getelementptr inbounds %"class.pir::OpOperand", ptr %8, i32 0, i32 0
  store ptr %7, ptr %9, align 8
  br label %10

10:                                               ; preds = %19, %1
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  %11 = call ptr @_ZNK3pir5Value7use_endEv(ptr noundef nonnull align 8 dereferenceable(8) %6)
  %12 = getelementptr inbounds %"class.pir::ValueUseIterator", ptr %5, i32 0, i32 0
  %13 = getelementptr inbounds %"class.pir::OpOperand", ptr %12, i32 0, i32 0
  store ptr %11, ptr %13, align 8
  %14 = call noundef zeroext i1 @_ZNK3pir16ValueUseIteratorINS_9OpOperandEEneERKS2_(ptr noundef nonnull align 8 dereferenceable(8) %4, ptr noundef nonnull align 8 dereferenceable(8) %5)
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  br i1 %14, label %16, label %15

15:                                               ; preds = %10
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  br label %21

16:                                               ; preds = %10
  %17 = load i64, ptr %3, align 8, !tbaa !9
  %18 = add i64 %17, 1
  store i64 %18, ptr %3, align 8, !tbaa !9
  br label %19

19:                                               ; preds = %16
  %20 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN3pir16ValueUseIteratorINS_9OpOperandEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %4)
  br label %10, !llvm.loop !11

21:                                               ; preds = %15
  %22 = load i64, ptr %3, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #2
  ret i64 %22
}

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_ZNK3pir16ValueUseIteratorINS_9OpOperandEEneERKS2_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN3pir16ValueUseIteratorINS_9OpOperandEEppEv(ptr noundef nonnull align 8 dereferenceable(8)) #1 align 2

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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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"

%"class.pir::ValueUseIterator" = type { %"class.pir::OpOperand" }
%"class.pir::OpOperand" = type { ptr }

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

; Function Attrs: mustprogress 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 ptr @_ZNK3pir5Value9use_beginEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local ptr @_ZNK3pir5Value7use_endEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef i64 @_ZNK3pir5Value9use_countEv(ptr noundef nonnull align 8 dereferenceable(8) %0) local_unnamed_addr #1 align 2 {
  %2 = alloca %"class.pir::ValueUseIterator", align 8
  %3 = alloca %"class.pir::ValueUseIterator", align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #2
  %4 = tail call ptr @_ZNK3pir5Value9use_beginEv(ptr noundef nonnull align 8 dereferenceable(8) %0)
  store ptr %4, ptr %2, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #2
  %5 = tail call ptr @_ZNK3pir5Value7use_endEv(ptr noundef nonnull align 8 dereferenceable(8) %0)
  store ptr %5, ptr %3, align 8
  %6 = call noundef zeroext i1 @_ZNK3pir16ValueUseIteratorINS_9OpOperandEEneERKS2_(ptr noundef nonnull align 8 dereferenceable(8) %2, ptr noundef nonnull align 8 dereferenceable(8) %3)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #2
  br i1 %6, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %1
  %.0.lcssa = phi i64 [ 0, %1 ], [ %7, %.lr.ph ]
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #2
  ret i64 %.0.lcssa

.lr.ph:                                           ; preds = %1, %.lr.ph
  %.02 = phi i64 [ %7, %.lr.ph ], [ 0, %1 ]
  %7 = add i64 %.02, 1
  %8 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN3pir16ValueUseIteratorINS_9OpOperandEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %2)
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #2
  %9 = call ptr @_ZNK3pir5Value7use_endEv(ptr noundef nonnull align 8 dereferenceable(8) %0)
  store ptr %9, ptr %3, align 8
  %10 = call noundef zeroext i1 @_ZNK3pir16ValueUseIteratorINS_9OpOperandEEneERKS2_(ptr noundef nonnull align 8 dereferenceable(8) %2, ptr noundef nonnull align 8 dereferenceable(8) %3)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #2
  br i1 %10, label %.lr.ph, label %._crit_edge, !llvm.loop !5
}

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_ZNK3pir16ValueUseIteratorINS_9OpOperandEEneERKS2_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN3pir16ValueUseIteratorINS_9OpOperandEEppEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #1 align 2

attributes #0 = { mustprogress 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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


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