; LLVM IR from yinqiwen/ardb :: src/common/channel (channel_pipeline)

; 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"

; 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: inlinehint mustprogress nounwind uwtable
declare dso_local noundef ptr @_ZN4ardb21ChannelHandlerContext7GetNextEv(ptr noundef nonnull align 8 dereferenceable(66)) #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef ptr @_ZN4ardb15ChannelPipeline24GetActualUpstreamContextEPNS_21ChannelHandlerContextE(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef %1) #2 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  %8 = load ptr, ptr %4, align 8
  br label %9

9:                                                ; preds = %2
  %10 = load ptr, ptr %5, align 8, !tbaa !5
  %11 = icmp eq ptr null, %10
  br i1 %11, label %12, label %13

12:                                               ; preds = %9
  store ptr null, ptr %3, align 8
  br label %33

13:                                               ; preds = %9
  br label %14

14:                                               ; preds = %13
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %15 = load ptr, ptr %5, align 8, !tbaa !5
  store ptr %15, ptr %6, align 8, !tbaa !5
  br label %16

16:                                               ; preds = %29, %14
  %17 = load ptr, ptr %6, align 8, !tbaa !5
  %18 = call noundef zeroext i1 @_ZN4ardb21ChannelHandlerContext17CanHandleUpstreamEv(ptr noundef nonnull align 8 dereferenceable(66) %17)
  %19 = xor i1 %18, true
  br i1 %19, label %20, label %30

20:                                               ; preds = %16
  %21 = load ptr, ptr %6, align 8, !tbaa !5
  %22 = call noundef ptr @_ZN4ardb21ChannelHandlerContext7GetNextEv(ptr noundef nonnull align 8 dereferenceable(66) %21)
  store ptr %22, ptr %6, align 8, !tbaa !5
  br label %23

23:                                               ; preds = %20
  %24 = load ptr, ptr %6, align 8, !tbaa !5
  %25 = icmp eq ptr null, %24
  br i1 %25, label %26, label %27

26:                                               ; preds = %23
  store ptr null, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %32

27:                                               ; preds = %23
  br label %28

28:                                               ; preds = %27
  br label %29

29:                                               ; preds = %28
  br label %16, !llvm.loop !9

30:                                               ; preds = %16
  %31 = load ptr, ptr %6, align 8, !tbaa !5
  store ptr %31, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %32

32:                                               ; preds = %30, %26
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  br label %33

33:                                               ; preds = %32, %12
  %34 = load ptr, ptr %3, align 8
  ret ptr %34
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN4ardb21ChannelHandlerContext17CanHandleUpstreamEv(ptr noundef nonnull align 8 dereferenceable(66)) #1 align 2

attributes #0 = { nocallback nofree nosync 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 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 = { 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 = 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"

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef ptr @_ZN4ardb21ChannelHandlerContext7GetNextEv(ptr noundef nonnull align 8 dereferenceable(66)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef ptr @_ZN4ardb15ChannelPipeline24GetActualUpstreamContextEPNS_21ChannelHandlerContextE(ptr nocapture noundef nonnull readnone align 8 dereferenceable(32) %0, ptr noundef %1) local_unnamed_addr #1 align 2 {
  %3 = icmp eq ptr %1, null
  br i1 %3, label %.loopexit, label %.preheader

.preheader:                                       ; preds = %2, %5
  %.0 = phi ptr [ %6, %5 ], [ %1, %2 ]
  %4 = tail call noundef zeroext i1 @_ZN4ardb21ChannelHandlerContext17CanHandleUpstreamEv(ptr noundef nonnull align 8 dereferenceable(66) %.0)
  br i1 %4, label %.loopexit, label %5

5:                                                ; preds = %.preheader
  %6 = tail call noundef ptr @_ZN4ardb21ChannelHandlerContext7GetNextEv(ptr noundef nonnull align 8 dereferenceable(66) %.0)
  %7 = icmp eq ptr %6, null
  br i1 %7, label %.loopexit, label %.preheader, !llvm.loop !5

.loopexit:                                        ; preds = %5, %.preheader, %2
  %.1 = phi ptr [ null, %2 ], [ %.0, %.preheader ], [ null, %5 ]
  ret ptr %.1
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN4ardb21ChannelHandlerContext17CanHandleUpstreamEv(ptr noundef nonnull align 8 dereferenceable(66)) local_unnamed_addr #0 align 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" }

!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: GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass