; LLVM IR from PaddlePaddle/Paddle :: paddle/pir/src/core/region.ll (ZN3pir6Region4swapEOS0_)

; 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::PointerListIterator" = type { %"struct.std::_List_iterator" }
%"struct.std::_List_iterator" = type { ptr }
%"class.pir::Region" = type { ptr, %"class.std::__cxx11::list" }
%"class.std::__cxx11::list" = type { %"class.std::__cxx11::_List_base" }
%"class.std::__cxx11::_List_base" = type { %"struct.std::__cxx11::_List_base<pir::Block *, std::allocator<pir::Block *>>::_List_impl" }
%"struct.std::__cxx11::_List_base<pir::Block *, std::allocator<pir::Block *>>::_List_impl" = type { %"struct.std::__detail::_List_node_header" }
%"struct.std::__detail::_List_node_header" = type { %"struct.std::__detail::_List_node_base", i64 }
%"struct.std::__detail::_List_node_base" = type { ptr, 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

declare void @_ZN3pir5Block9SetParentEPNS_6RegionE(ptr noundef nonnull align 8 dereferenceable(120), ptr noundef) #1

; Function Attrs: mustprogress uwtable
declare dso_local ptr @_ZN3pir6Region5beginEv(ptr noundef nonnull align 8 dereferenceable(32)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(120) ptr @_ZNK3pir19PointerListIteratorINS_5BlockEEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) #3 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN3pir19PointerListIteratorINS_5BlockEEppEv(ptr noundef nonnull align 8 dereferenceable(8)) #3 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt7__cxx114listIPN3pir5BlockESaIS3_EE4swapERS5_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(24)) #3 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN3pir6Region4swapEOS0_(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef nonnull align 8 dereferenceable(32) %1) #2 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca %"class.pir::PointerListIterator", align 8
  %7 = alloca %"class.pir::PointerListIterator", align 8
  %8 = alloca ptr, align 8
  %9 = alloca ptr, align 8
  %10 = alloca %"class.pir::PointerListIterator", align 8
  %11 = alloca %"class.pir::PointerListIterator", align 8
  %12 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  %13 = load ptr, ptr %3, align 8
  %14 = getelementptr inbounds %"class.pir::Region", ptr %13, i32 0, i32 1
  %15 = load ptr, ptr %4, align 8, !tbaa !5
  %16 = getelementptr inbounds %"class.pir::Region", ptr %15, i32 0, i32 1
  call void @_ZNSt7__cxx114listIPN3pir5BlockESaIS3_EE4swapERS5_(ptr noundef nonnull align 8 dereferenceable(24) %14, ptr noundef nonnull align 8 dereferenceable(24) %16) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #4
  store ptr %13, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #4
  %17 = load ptr, ptr %5, align 8, !tbaa !5
  %18 = call ptr @_ZN3pir6Region5beginEv(ptr noundef nonnull align 8 dereferenceable(32) %17)
  %19 = getelementptr inbounds %"class.pir::PointerListIterator", ptr %6, i32 0, i32 0
  %20 = getelementptr inbounds %"struct.std::_List_iterator", ptr %19, i32 0, i32 0
  store ptr %18, ptr %20, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #4
  %21 = load ptr, ptr %5, align 8, !tbaa !5
  %22 = call ptr @_ZN3pir6Region3endEv(ptr noundef nonnull align 8 dereferenceable(32) %21)
  %23 = getelementptr inbounds %"class.pir::PointerListIterator", ptr %7, i32 0, i32 0
  %24 = getelementptr inbounds %"struct.std::_List_iterator", ptr %23, i32 0, i32 0
  store ptr %22, ptr %24, align 8
  br label %25

25:                                               ; preds = %31, %2
  %26 = call noundef zeroext i1 @_ZNK3pir19PointerListIteratorINS_5BlockEEneERKS2_(ptr noundef nonnull align 8 dereferenceable(8) %6, ptr noundef nonnull align 8 dereferenceable(8) %7) #4
  br i1 %26, label %28, label %27

27:                                               ; preds = %25
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #4
  br label %33

28:                                               ; preds = %25
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #4
  %29 = call noundef nonnull align 8 dereferenceable(120) ptr @_ZNK3pir19PointerListIteratorINS_5BlockEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %6) #4
  store ptr %29, ptr %8, align 8, !tbaa !5
  %30 = load ptr, ptr %8, align 8, !tbaa !5
  call void @_ZN3pir5Block9SetParentEPNS_6RegionE(ptr noundef nonnull align 8 dereferenceable(120) %30, ptr noundef %13)
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #4
  br label %31

31:                                               ; preds = %28
  %32 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN3pir19PointerListIteratorINS_5BlockEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %6) #4
  br label %25

33:                                               ; preds = %27
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #4
  %34 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %34, ptr %9, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #4
  %35 = load ptr, ptr %9, align 8, !tbaa !5
  %36 = call ptr @_ZN3pir6Region5beginEv(ptr noundef nonnull align 8 dereferenceable(32) %35)
  %37 = getelementptr inbounds %"class.pir::PointerListIterator", ptr %10, i32 0, i32 0
  %38 = getelementptr inbounds %"struct.std::_List_iterator", ptr %37, i32 0, i32 0
  store ptr %36, ptr %38, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %11) #4
  %39 = load ptr, ptr %9, align 8, !tbaa !5
  %40 = call ptr @_ZN3pir6Region3endEv(ptr noundef nonnull align 8 dereferenceable(32) %39)
  %41 = getelementptr inbounds %"class.pir::PointerListIterator", ptr %11, i32 0, i32 0
  %42 = getelementptr inbounds %"struct.std::_List_iterator", ptr %41, i32 0, i32 0
  store ptr %40, ptr %42, align 8
  br label %43

43:                                               ; preds = %50, %33
  %44 = call noundef zeroext i1 @_ZNK3pir19PointerListIteratorINS_5BlockEEneERKS2_(ptr noundef nonnull align 8 dereferenceable(8) %10, ptr noundef nonnull align 8 dereferenceable(8) %11) #4
  br i1 %44, label %46, label %45

45:                                               ; preds = %43
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #4
  br label %52

46:                                               ; preds = %43
  call void @llvm.lifetime.start.p0(i64 8, ptr %12) #4
  %47 = call noundef nonnull align 8 dereferenceable(120) ptr @_ZNK3pir19PointerListIteratorINS_5BlockEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %10) #4
  store ptr %47, ptr %12, align 8, !tbaa !5
  %48 = load ptr, ptr %12, align 8, !tbaa !5
  %49 = load ptr, ptr %4, align 8, !tbaa !5
  call void @_ZN3pir5Block9SetParentEPNS_6RegionE(ptr noundef nonnull align 8 dereferenceable(120) %48, ptr noundef %49)
  call void @llvm.lifetime.end.p0(i64 8, ptr %12) #4
  br label %50

50:                                               ; preds = %46
  %51 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN3pir19PointerListIteratorINS_5BlockEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %10) #4
  br label %43

52:                                               ; preds = %45
  ret void
}

; Function Attrs: mustprogress uwtable
declare dso_local ptr @_ZN3pir6Region3endEv(ptr noundef nonnull align 8 dereferenceable(32)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZNK3pir19PointerListIteratorINS_5BlockEEneERKS2_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #3 align 2

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


; 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::PointerListIterator" = type { %"struct.std::_List_iterator" }
%"struct.std::_List_iterator" = 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

declare void @_ZN3pir5Block9SetParentEPNS_6RegionE(ptr noundef nonnull align 8 dereferenceable(120), ptr noundef) local_unnamed_addr #1

; Function Attrs: mustprogress uwtable
declare dso_local ptr @_ZN3pir6Region5beginEv(ptr noundef nonnull align 8 dereferenceable(32)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(120) ptr @_ZNK3pir19PointerListIteratorINS_5BlockEEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #3 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN3pir19PointerListIteratorINS_5BlockEEppEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #3 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt7__cxx114listIPN3pir5BlockESaIS3_EE4swapERS5_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #3 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN3pir6Region4swapEOS0_(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef nonnull align 8 dereferenceable(32) %1) local_unnamed_addr #2 align 2 {
  %3 = alloca %"class.pir::PointerListIterator", align 8
  %4 = alloca %"class.pir::PointerListIterator", align 8
  %5 = alloca %"class.pir::PointerListIterator", align 8
  %6 = alloca %"class.pir::PointerListIterator", align 8
  %7 = getelementptr inbounds i8, ptr %0, i64 8
  %8 = getelementptr inbounds i8, ptr %1, i64 8
  tail call void @_ZNSt7__cxx114listIPN3pir5BlockESaIS3_EE4swapERS5_(ptr noundef nonnull align 8 dereferenceable(24) %7, ptr noundef nonnull align 8 dereferenceable(24) %8) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #4
  %9 = tail call ptr @_ZN3pir6Region5beginEv(ptr noundef nonnull align 8 dereferenceable(32) %0)
  store ptr %9, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #4
  %10 = tail call ptr @_ZN3pir6Region3endEv(ptr noundef nonnull align 8 dereferenceable(32) %0)
  store ptr %10, ptr %4, align 8
  %11 = call noundef zeroext i1 @_ZNK3pir19PointerListIteratorINS_5BlockEEneERKS2_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(8) %4) #4
  br i1 %11, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %2
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %5) #4
  %12 = call ptr @_ZN3pir6Region5beginEv(ptr noundef nonnull align 8 dereferenceable(32) %1)
  store ptr %12, ptr %5, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %6) #4
  %13 = call ptr @_ZN3pir6Region3endEv(ptr noundef nonnull align 8 dereferenceable(32) %1)
  store ptr %13, ptr %6, align 8
  %14 = call noundef zeroext i1 @_ZNK3pir19PointerListIteratorINS_5BlockEEneERKS2_(ptr noundef nonnull align 8 dereferenceable(8) %5, ptr noundef nonnull align 8 dereferenceable(8) %6) #4
  br i1 %14, label %.lr.ph11, label %._crit_edge12

.lr.ph:                                           ; preds = %2, %.lr.ph
  %15 = call noundef nonnull align 8 dereferenceable(120) ptr @_ZNK3pir19PointerListIteratorINS_5BlockEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %3) #4
  call void @_ZN3pir5Block9SetParentEPNS_6RegionE(ptr noundef nonnull align 8 dereferenceable(120) %15, ptr noundef nonnull %0)
  %16 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN3pir19PointerListIteratorINS_5BlockEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %3) #4
  %17 = call noundef zeroext i1 @_ZNK3pir19PointerListIteratorINS_5BlockEEneERKS2_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(8) %4) #4
  br i1 %17, label %.lr.ph, label %._crit_edge

._crit_edge12:                                    ; preds = %.lr.ph11, %._crit_edge
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %6) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %5) #4
  ret void

.lr.ph11:                                         ; preds = %._crit_edge, %.lr.ph11
  %18 = call noundef nonnull align 8 dereferenceable(120) ptr @_ZNK3pir19PointerListIteratorINS_5BlockEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %5) #4
  call void @_ZN3pir5Block9SetParentEPNS_6RegionE(ptr noundef nonnull align 8 dereferenceable(120) %18, ptr noundef nonnull %1)
  %19 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN3pir19PointerListIteratorINS_5BlockEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %5) #4
  %20 = call noundef zeroext i1 @_ZNK3pir19PointerListIteratorINS_5BlockEEneERKS2_(ptr noundef nonnull align 8 dereferenceable(8) %5, ptr noundef nonnull align 8 dereferenceable(8) %6) #4
  br i1 %20, label %.lr.ph11, label %._crit_edge12
}

; Function Attrs: mustprogress uwtable
declare dso_local ptr @_ZN3pir6Region3endEv(ptr noundef nonnull align 8 dereferenceable(32)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZNK3pir19PointerListIteratorINS_5BlockEEneERKS2_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #3 align 2

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


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