; LLVM IR from russellsayshi/CeeBeeServer :: lists (ll_delete)

; 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.ll_item = 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

; Function Attrs: nounwind uwtable
define dso_local ptr @ll_delete(ptr noundef %0, ptr noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %9, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  store ptr null, ptr %7, align 8, !tbaa !5
  br label %10

10:                                               ; preds = %35, %2
  %11 = load ptr, ptr %6, align 8, !tbaa !5
  %12 = icmp ne ptr %11, null
  br i1 %12, label %13, label %39

13:                                               ; preds = %10
  %14 = load ptr, ptr %6, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct.ll_item, ptr %14, i32 0, i32 0
  %16 = load ptr, ptr %15, align 8, !tbaa !9
  %17 = load ptr, ptr %5, align 8, !tbaa !5
  %18 = icmp eq ptr %16, %17
  br i1 %18, label %19, label %35

19:                                               ; preds = %13
  %20 = load ptr, ptr %7, align 8, !tbaa !5
  %21 = icmp eq ptr %20, null
  br i1 %21, label %22, label %27

22:                                               ; preds = %19
  %23 = load ptr, ptr %6, align 8, !tbaa !5
  call void @free(ptr noundef %23) #3
  %24 = load ptr, ptr %6, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct.ll_item, ptr %24, i32 0, i32 1
  %26 = load ptr, ptr %25, align 8, !tbaa !11
  store ptr %26, ptr %3, align 8
  store i32 1, ptr %8, align 4
  br label %41

27:                                               ; preds = %19
  %28 = load ptr, ptr %6, align 8, !tbaa !5
  %29 = getelementptr inbounds %struct.ll_item, ptr %28, i32 0, i32 1
  %30 = load ptr, ptr %29, align 8, !tbaa !11
  %31 = load ptr, ptr %7, align 8, !tbaa !5
  %32 = getelementptr inbounds %struct.ll_item, ptr %31, i32 0, i32 1
  store ptr %30, ptr %32, align 8, !tbaa !11
  %33 = load ptr, ptr %6, align 8, !tbaa !5
  call void @free(ptr noundef %33) #3
  %34 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %34, ptr %3, align 8
  store i32 1, ptr %8, align 4
  br label %41

35:                                               ; preds = %13
  %36 = load ptr, ptr %6, align 8, !tbaa !5
  %37 = getelementptr inbounds %struct.ll_item, ptr %36, i32 0, i32 1
  %38 = load ptr, ptr %37, align 8, !tbaa !11
  store ptr %38, ptr %6, align 8, !tbaa !5
  br label %10, !llvm.loop !12

39:                                               ; preds = %10
  %40 = load ptr, ptr %5, align 8, !tbaa !5
  store ptr %40, ptr %3, align 8
  store i32 1, ptr %8, align 4
  br label %41

41:                                               ; preds = %39, %27, %22
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  %42 = load ptr, ptr %3, align 8
  ret ptr %42
}

; Function Attrs: nounwind
declare void @free(ptr noundef) #2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 = { nounwind "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/C++ TBAA"}
!9 = !{!10, !6, i64 0}
!10 = !{!"ll_item", !6, i64 0, !6, i64 8}
!11 = !{!10, !6, i64 8}
!12 = distinct !{!12, !13}
!13 = !{!"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: nounwind uwtable
define dso_local ptr @ll_delete(ptr noundef %0, ptr noundef readnone %1) local_unnamed_addr #0 {
  %.not16 = icmp eq ptr %0, null
  br i1 %.not16, label %.loopexit, label %.lr.ph

.lr.ph:                                           ; preds = %2, %8
  %.01417 = phi ptr [ %10, %8 ], [ %0, %2 ]
  %3 = load ptr, ptr %.01417, align 8, !tbaa !5
  %4 = icmp eq ptr %3, %1
  br i1 %4, label %5, label %8

5:                                                ; preds = %.lr.ph
  tail call void @free(ptr noundef nonnull %.01417) #2
  %6 = getelementptr inbounds i8, ptr %.01417, i64 8
  %7 = load ptr, ptr %6, align 8, !tbaa !10
  br label %.loopexit

8:                                                ; preds = %.lr.ph
  %9 = getelementptr inbounds i8, ptr %.01417, i64 8
  %10 = load ptr, ptr %9, align 8, !tbaa !10
  %.not = icmp eq ptr %10, null
  br i1 %.not, label %.loopexit, label %.lr.ph, !llvm.loop !11

.loopexit:                                        ; preds = %8, %2, %5
  %.0 = phi ptr [ %7, %5 ], [ %1, %2 ], [ %1, %8 ]
  ret ptr %.0
}

; Function Attrs: mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite)
declare void @free(ptr allocptr nocapture noundef) local_unnamed_addr #1

attributes #0 = { 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 willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite) "alloc-family"="malloc" "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, !7, i64 0}
!6 = !{!"ll_item", !7, i64 0, !7, i64 8}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!6, !7, i64 8}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


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