; LLVM IR from Water-Melon/Melon :: src (mln_gc)

; 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.mln_gc_s = type { ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, i8 }
%struct.mln_gc_item_s = type { ptr, ptr, ptr, ptr, ptr, ptr, i8 }

; 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 nounwind uwtable
declare hidden void @mln_gc_item_chain_del(ptr noundef, ptr noundef, ptr noundef) #1

; Function Attrs: inlinehint nounwind uwtable
declare hidden void @mln_gc_item_chain_add(ptr noundef, ptr noundef, ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local void @mln_gc_merge(ptr noundef nonnull %0, ptr noundef nonnull %1) #2 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  br label %6

6:                                                ; preds = %11, %2
  %7 = load ptr, ptr %4, align 8, !tbaa !5
  %8 = getelementptr inbounds %struct.mln_gc_s, ptr %7, i32 0, i32 1
  %9 = load ptr, ptr %8, align 8, !tbaa !9
  store ptr %9, ptr %5, align 8, !tbaa !5
  %10 = icmp ne ptr %9, null
  br i1 %10, label %11, label %32

11:                                               ; preds = %6
  %12 = load ptr, ptr %4, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct.mln_gc_s, ptr %12, i32 0, i32 1
  %14 = load ptr, ptr %4, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct.mln_gc_s, ptr %14, i32 0, i32 2
  %16 = load ptr, ptr %5, align 8, !tbaa !5
  call void @mln_gc_item_chain_del(ptr noundef %13, ptr noundef %15, ptr noundef %16)
  %17 = load ptr, ptr %4, align 8, !tbaa !5
  %18 = getelementptr inbounds %struct.mln_gc_s, ptr %17, i32 0, i32 10
  %19 = load ptr, ptr %18, align 8, !tbaa !12
  %20 = load ptr, ptr %3, align 8, !tbaa !5
  %21 = load ptr, ptr %5, align 8, !tbaa !5
  %22 = getelementptr inbounds %struct.mln_gc_item_s, ptr %21, i32 0, i32 1
  %23 = load ptr, ptr %22, align 8, !tbaa !13
  call void %19(ptr noundef %20, ptr noundef %23)
  %24 = load ptr, ptr %3, align 8, !tbaa !5
  %25 = load ptr, ptr %5, align 8, !tbaa !5
  %26 = getelementptr inbounds %struct.mln_gc_item_s, ptr %25, i32 0, i32 0
  store ptr %24, ptr %26, align 8, !tbaa !15
  %27 = load ptr, ptr %3, align 8, !tbaa !5
  %28 = getelementptr inbounds %struct.mln_gc_s, ptr %27, i32 0, i32 1
  %29 = load ptr, ptr %3, align 8, !tbaa !5
  %30 = getelementptr inbounds %struct.mln_gc_s, ptr %29, i32 0, i32 2
  %31 = load ptr, ptr %5, align 8, !tbaa !5
  call void @mln_gc_item_chain_add(ptr noundef %28, ptr noundef %30, ptr noundef %31)
  br label %6, !llvm.loop !16

32:                                               ; preds = %6
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { inlinehint 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 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 8}
!10 = !{!"mln_gc_s", !6, i64 0, !6, i64 8, !6, i64 16, !6, i64 24, !6, i64 32, !6, i64 40, !6, i64 48, !6, i64 56, !6, i64 64, !6, i64 72, !6, i64 80, !6, i64 88, !6, i64 96, !6, i64 104, !11, i64 112}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !6, i64 80}
!13 = !{!14, !6, i64 8}
!14 = !{!"mln_gc_item_s", !6, i64 0, !6, i64 8, !6, i64 16, !6, i64 24, !6, i64 32, !6, i64 40, !11, i64 48, !11, i64 48, !11, i64 48, !11, i64 48}
!15 = !{!14, !6, i64 0}
!16 = distinct !{!16, !17}
!17 = !{!"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 nounwind uwtable
declare hidden void @mln_gc_item_chain_del(ptr noundef, ptr noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: inlinehint nounwind uwtable
declare hidden void @mln_gc_item_chain_add(ptr noundef, ptr noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @mln_gc_merge(ptr noundef nonnull %0, ptr noundef nonnull %1) local_unnamed_addr #1 {
  %3 = getelementptr inbounds i8, ptr %1, i64 8
  %4 = load ptr, ptr %3, align 8, !tbaa !5
  %.not12 = icmp eq ptr %4, null
  br i1 %.not12, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2
  %5 = getelementptr inbounds i8, ptr %1, i64 16
  %6 = getelementptr inbounds i8, ptr %1, i64 80
  %7 = getelementptr inbounds i8, ptr %0, i64 8
  %8 = getelementptr inbounds i8, ptr %0, i64 16
  br label %9

9:                                                ; preds = %.lr.ph, %9
  %10 = phi ptr [ %4, %.lr.ph ], [ %14, %9 ]
  tail call void @mln_gc_item_chain_del(ptr noundef nonnull %3, ptr noundef nonnull %5, ptr noundef nonnull %10)
  %11 = load ptr, ptr %6, align 8, !tbaa !11
  %12 = getelementptr inbounds i8, ptr %10, i64 8
  %13 = load ptr, ptr %12, align 8, !tbaa !12
  tail call void %11(ptr noundef nonnull %0, ptr noundef %13) #2
  store ptr %0, ptr %10, align 8, !tbaa !14
  tail call void @mln_gc_item_chain_add(ptr noundef nonnull %7, ptr noundef nonnull %8, ptr noundef nonnull %10)
  %14 = load ptr, ptr %3, align 8, !tbaa !5
  %.not = icmp eq ptr %14, null
  br i1 %.not, label %._crit_edge, label %9, !llvm.loop !15

._crit_edge:                                      ; preds = %9, %2
  ret void
}

attributes #0 = { inlinehint 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 = { 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 8}
!6 = !{!"mln_gc_s", !7, i64 0, !7, i64 8, !7, i64 16, !7, i64 24, !7, i64 32, !7, i64 40, !7, i64 48, !7, i64 56, !7, i64 64, !7, i64 72, !7, i64 80, !7, i64 88, !7, i64 96, !7, i64 104, !10, i64 112}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!6, !7, i64 80}
!12 = !{!13, !7, i64 8}
!13 = !{!"mln_gc_item_s", !7, i64 0, !7, i64 8, !7, i64 16, !7, i64 24, !7, i64 32, !7, i64 40, !10, i64 48, !10, i64 48, !10, i64 48, !10, i64 48}
!14 = !{!13, !7, i64 0}
!15 = distinct !{!15, !16}
!16 = !{!"llvm.loop.mustprogress"}


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