; LLVM IR from lionsoul2014/friso :: src (friso_link)

; 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.friso_link_entry = type { ptr, ptr, i32 }
%struct.friso_link_node = type { ptr, 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
declare void @free(ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local ptr @link_list_clear(ptr noundef %0) #2 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %5 = load ptr, ptr %2, align 8, !tbaa !5
  %6 = getelementptr inbounds %struct.friso_link_entry, ptr %5, i32 0, i32 0
  %7 = load ptr, ptr %6, align 8, !tbaa !9
  %8 = getelementptr inbounds %struct.friso_link_node, ptr %7, i32 0, i32 2
  %9 = load ptr, ptr %8, align 8, !tbaa !12
  store ptr %9, ptr %3, align 8, !tbaa !5
  br label %10

10:                                               ; preds = %16, %1
  %11 = load ptr, ptr %3, align 8, !tbaa !5
  %12 = load ptr, ptr %2, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct.friso_link_entry, ptr %12, i32 0, i32 1
  %14 = load ptr, ptr %13, align 8, !tbaa !14
  %15 = icmp ne ptr %11, %14
  br i1 %15, label %16, label %22

16:                                               ; preds = %10
  %17 = load ptr, ptr %3, align 8, !tbaa !5
  %18 = getelementptr inbounds %struct.friso_link_node, ptr %17, i32 0, i32 2
  %19 = load ptr, ptr %18, align 8, !tbaa !12
  store ptr %19, ptr %4, align 8, !tbaa !5
  %20 = load ptr, ptr %3, align 8, !tbaa !5
  call void @free(ptr noundef %20) #3
  %21 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %21, ptr %3, align 8, !tbaa !5
  br label %10, !llvm.loop !15

22:                                               ; preds = %10
  %23 = load ptr, ptr %2, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.friso_link_entry, ptr %23, i32 0, i32 1
  %25 = load ptr, ptr %24, align 8, !tbaa !14
  %26 = load ptr, ptr %2, align 8, !tbaa !5
  %27 = getelementptr inbounds %struct.friso_link_entry, ptr %26, i32 0, i32 0
  %28 = load ptr, ptr %27, align 8, !tbaa !9
  %29 = getelementptr inbounds %struct.friso_link_node, ptr %28, i32 0, i32 2
  store ptr %25, ptr %29, align 8, !tbaa !12
  %30 = load ptr, ptr %2, align 8, !tbaa !5
  %31 = getelementptr inbounds %struct.friso_link_entry, ptr %30, i32 0, i32 0
  %32 = load ptr, ptr %31, align 8, !tbaa !9
  %33 = load ptr, ptr %2, align 8, !tbaa !5
  %34 = getelementptr inbounds %struct.friso_link_entry, ptr %33, i32 0, i32 1
  %35 = load ptr, ptr %34, align 8, !tbaa !14
  %36 = getelementptr inbounds %struct.friso_link_node, ptr %35, i32 0, i32 1
  store ptr %32, ptr %36, align 8, !tbaa !17
  %37 = load ptr, ptr %2, align 8, !tbaa !5
  %38 = getelementptr inbounds %struct.friso_link_entry, ptr %37, i32 0, i32 2
  store i32 0, ptr %38, align 8, !tbaa !18
  %39 = load ptr, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  ret ptr %39
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { 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 = { 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 = !{!"", !6, i64 0, !6, i64 8, !11, i64 16}
!11 = !{!"int", !7, i64 0}
!12 = !{!13, !6, i64 16}
!13 = !{!"friso_link_node", !6, i64 0, !6, i64 8, !6, i64 16}
!14 = !{!10, !6, i64 8}
!15 = distinct !{!15, !16}
!16 = !{!"llvm.loop.mustprogress"}
!17 = !{!13, !6, i64 8}
!18 = !{!10, !11, i64 16}


; 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: mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite)
declare void @free(ptr allocptr nocapture noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local noundef ptr @link_list_clear(ptr noundef returned %0) local_unnamed_addr #1 {
  %2 = load ptr, ptr %0, align 8, !tbaa !5
  %3 = getelementptr inbounds i8, ptr %2, i64 16
  %4 = load ptr, ptr %3, align 8, !tbaa !11
  %5 = getelementptr inbounds i8, ptr %0, i64 8
  %6 = load ptr, ptr %5, align 8, !tbaa !13
  %.not13 = icmp eq ptr %4, %6
  br i1 %.not13, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %1, %.lr.ph
  %.014 = phi ptr [ %8, %.lr.ph ], [ %4, %1 ]
  %7 = getelementptr inbounds i8, ptr %.014, i64 16
  %8 = load ptr, ptr %7, align 8, !tbaa !11
  tail call void @free(ptr noundef %.014) #2
  %9 = load ptr, ptr %5, align 8, !tbaa !13
  %.not = icmp eq ptr %8, %9
  br i1 %.not, label %._crit_edge.loopexit, label %.lr.ph, !llvm.loop !14

._crit_edge.loopexit:                             ; preds = %.lr.ph
  %.pre = load ptr, ptr %0, align 8, !tbaa !5
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %1
  %10 = phi ptr [ %2, %1 ], [ %.pre, %._crit_edge.loopexit ]
  %.lcssa = phi ptr [ %6, %1 ], [ %9, %._crit_edge.loopexit ]
  %11 = getelementptr inbounds i8, ptr %10, i64 16
  store ptr %.lcssa, ptr %11, align 8, !tbaa !11
  %12 = getelementptr inbounds i8, ptr %.lcssa, i64 8
  store ptr %10, ptr %12, align 8, !tbaa !16
  %13 = getelementptr inbounds i8, ptr %0, i64 16
  store i32 0, ptr %13, align 8, !tbaa !17
  ret ptr %0
}

attributes #0 = { 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 #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 }

!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 = !{!"", !7, i64 0, !7, i64 8, !10, i64 16}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!12, !7, i64 16}
!12 = !{!"friso_link_node", !7, i64 0, !7, i64 8, !7, i64 16}
!13 = !{!6, !7, i64 8}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}
!16 = !{!12, !7, i64 8}
!17 = !{!6, !10, i64 16}


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