; LLVM IR from PaddlePaddle/Paddle :: paddle/pir/src/core/value.ll (ZNK3pir5Value18ReplaceAllUsesWithES0_)

; 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::Value" = type { ptr }
%"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: 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) #1

; Function Attrs: mustprogress uwtable
declare dso_local ptr @_ZNK3pir5Value9use_beginEv(ptr noundef nonnull align 8 dereferenceable(8)) #2 align 2

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

; 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)) #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local ptr @_ZN3pir16ValueUseIteratorINS_9OpOperandEEppEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef ptr @_ZN3pir16ValueUseIteratorINS_9OpOperandEEptEv(ptr noundef nonnull align 8 dereferenceable(8)) #3 align 2

declare void @_ZN3pir9OpOperand10set_sourceENS_5ValueE(ptr noundef nonnull align 8 dereferenceable(8), ptr) #4

; Function Attrs: mustprogress uwtable
define dso_local void @_ZNK3pir5Value18ReplaceAllUsesWithES0_(ptr noundef nonnull align 8 dereferenceable(8) %0, ptr %1) #2 align 2 {
  %3 = alloca %"class.pir::Value", align 8
  %4 = alloca ptr, align 8
  %5 = alloca %"class.pir::ValueUseIterator", align 8
  %6 = alloca %"class.pir::ValueUseIterator", align 8
  %7 = alloca %"class.pir::ValueUseIterator", align 8
  %8 = alloca %"class.pir::Value", align 8
  %9 = getelementptr inbounds %"class.pir::Value", ptr %3, i32 0, i32 0
  store ptr %1, ptr %9, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  %10 = load ptr, ptr %4, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #5
  %11 = call ptr @_ZNK3pir5Value9use_beginEv(ptr noundef nonnull align 8 dereferenceable(8) %10)
  %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
  br label %14

14:                                               ; preds = %20, %2
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #5
  %15 = call ptr @_ZNK3pir5Value7use_endEv(ptr noundef nonnull align 8 dereferenceable(8) %10)
  %16 = getelementptr inbounds %"class.pir::ValueUseIterator", ptr %6, i32 0, i32 0
  %17 = getelementptr inbounds %"class.pir::OpOperand", ptr %16, i32 0, i32 0
  store ptr %15, ptr %17, align 8
  %18 = call noundef zeroext i1 @_ZNK3pir16ValueUseIteratorINS_9OpOperandEEneERKS2_(ptr noundef nonnull align 8 dereferenceable(8) %5, ptr noundef nonnull align 8 dereferenceable(8) %6)
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #5
  br i1 %18, label %20, label %19

19:                                               ; preds = %14
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #5
  br label %27

20:                                               ; preds = %14
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #5
  %21 = call ptr @_ZN3pir16ValueUseIteratorINS_9OpOperandEEppEi(ptr noundef nonnull align 8 dereferenceable(8) %5, i32 noundef 0)
  %22 = getelementptr inbounds %"class.pir::ValueUseIterator", ptr %7, i32 0, i32 0
  %23 = getelementptr inbounds %"class.pir::OpOperand", ptr %22, i32 0, i32 0
  store ptr %21, ptr %23, align 8
  %24 = call noundef ptr @_ZN3pir16ValueUseIteratorINS_9OpOperandEEptEv(ptr noundef nonnull align 8 dereferenceable(8) %7)
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %8, ptr align 8 %3, i64 8, i1 false), !tbaa.struct !9
  %25 = getelementptr inbounds %"class.pir::Value", ptr %8, i32 0, i32 0
  %26 = load ptr, ptr %25, align 8
  call void @_ZN3pir9OpOperand10set_sourceENS_5ValueE(ptr noundef nonnull align 8 dereferenceable(8) %24, ptr %26)
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #5
  br label %14, !llvm.loop !10

27:                                               ; preds = %19
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #3 = { 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 #4 = { "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 #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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{i64 0, i64 8, !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"

%"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
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 ptr @_ZN3pir16ValueUseIteratorINS_9OpOperandEEppEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef ptr @_ZN3pir16ValueUseIteratorINS_9OpOperandEEptEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #2 align 2

declare void @_ZN3pir9OpOperand10set_sourceENS_5ValueE(ptr noundef nonnull align 8 dereferenceable(8), ptr) local_unnamed_addr #3

; Function Attrs: mustprogress uwtable
define dso_local void @_ZNK3pir5Value18ReplaceAllUsesWithES0_(ptr noundef nonnull align 8 dereferenceable(8) %0, ptr %1) local_unnamed_addr #1 align 2 {
  %3 = alloca %"class.pir::ValueUseIterator", align 8
  %4 = alloca %"class.pir::ValueUseIterator", align 8
  %5 = alloca %"class.pir::ValueUseIterator", align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #4
  %6 = tail call ptr @_ZNK3pir5Value9use_beginEv(ptr noundef nonnull align 8 dereferenceable(8) %0)
  store ptr %6, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #4
  %7 = tail call ptr @_ZNK3pir5Value7use_endEv(ptr noundef nonnull align 8 dereferenceable(8) %0)
  store ptr %7, ptr %4, align 8
  %8 = call noundef zeroext i1 @_ZNK3pir16ValueUseIteratorINS_9OpOperandEEneERKS2_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(8) %4)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #4
  br i1 %8, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %2
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #4
  ret void

.lr.ph:                                           ; preds = %2, %.lr.ph
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %5) #4
  %9 = call ptr @_ZN3pir16ValueUseIteratorINS_9OpOperandEEppEi(ptr noundef nonnull align 8 dereferenceable(8) %3, i32 noundef 0)
  store ptr %9, ptr %5, align 8
  %10 = call noundef ptr @_ZN3pir16ValueUseIteratorINS_9OpOperandEEptEv(ptr noundef nonnull align 8 dereferenceable(8) %5)
  call void @_ZN3pir9OpOperand10set_sourceENS_5ValueE(ptr noundef nonnull align 8 dereferenceable(8) %10, ptr %1)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %5) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #4
  %11 = call ptr @_ZNK3pir5Value7use_endEv(ptr noundef nonnull align 8 dereferenceable(8) %0)
  store ptr %11, ptr %4, align 8
  %12 = call noundef zeroext i1 @_ZNK3pir16ValueUseIteratorINS_9OpOperandEEneERKS2_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(8) %4)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #4
  br i1 %12, label %.lr.ph, label %._crit_edge, !llvm.loop !5
}

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


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