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

; 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_fork_s = type { ptr, ptr, ptr, %struct.mln_tcp_conn_t, i32, i32, i32, i32, i32, i64, ptr, i32, i32 }
%struct.mln_tcp_conn_t = type { ptr, ptr, ptr, ptr, ptr, ptr, ptr, i32 }

@worker_list_head = external dso_local global ptr, align 8

; 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 i32 @mln_fork_iterate(ptr noundef nonnull %0, ptr noundef %1, ptr noundef %2) #1 {
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !5
  store ptr %2, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  %10 = load ptr, ptr @worker_list_head, align 8, !tbaa !5
  store ptr %10, ptr %8, align 8, !tbaa !5
  br label %11

11:                                               ; preds = %27, %3
  %12 = load ptr, ptr %8, align 8, !tbaa !5
  %13 = icmp ne ptr %12, null
  br i1 %13, label %14, label %31

14:                                               ; preds = %11
  %15 = load ptr, ptr %6, align 8, !tbaa !5
  %16 = icmp ne ptr %15, null
  br i1 %16, label %17, label %26

17:                                               ; preds = %14
  %18 = load ptr, ptr %6, align 8, !tbaa !5
  %19 = load ptr, ptr %5, align 8, !tbaa !5
  %20 = load ptr, ptr %8, align 8, !tbaa !5
  %21 = load ptr, ptr %7, align 8, !tbaa !5
  %22 = call i32 %18(ptr noundef %19, ptr noundef %20, ptr noundef %21)
  %23 = icmp slt i32 %22, 0
  br i1 %23, label %24, label %25

24:                                               ; preds = %17
  store i32 -1, ptr %4, align 4
  store i32 1, ptr %9, align 4
  br label %32

25:                                               ; preds = %17
  br label %26

26:                                               ; preds = %25, %14
  br label %27

27:                                               ; preds = %26
  %28 = load ptr, ptr %8, align 8, !tbaa !5
  %29 = getelementptr inbounds %struct.mln_fork_s, ptr %28, i32 0, i32 1
  %30 = load ptr, ptr %29, align 8, !tbaa !9
  store ptr %30, ptr %8, align 8, !tbaa !5
  br label %11, !llvm.loop !14

31:                                               ; preds = %11
  store i32 0, ptr %4, align 4
  store i32 1, ptr %9, align 4
  br label %32

32:                                               ; preds = %31, %24
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  %33 = load i32, ptr %4, align 4
  ret i32 %33
}

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 }

!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_fork_s", !6, i64 0, !6, i64 8, !6, i64 16, !11, i64 24, !12, i64 88, !12, i64 92, !12, i64 96, !12, i64 100, !12, i64 104, !13, i64 112, !6, i64 120, !12, i64 128, !12, i64 132}
!11 = !{!"", !6, i64 0, !6, i64 8, !6, i64 16, !6, i64 24, !6, i64 32, !6, i64 40, !6, i64 48, !12, i64 56}
!12 = !{!"int", !7, i64 0}
!13 = !{!"long", !7, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"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"

@worker_list_head = external dso_local local_unnamed_addr global ptr, align 8

; Function Attrs: nounwind uwtable
define dso_local range(i32 -1, 1) i32 @mln_fork_iterate(ptr noundef nonnull %0, ptr noundef readonly %1, ptr noundef %2) local_unnamed_addr #0 {
  %.010 = load ptr, ptr @worker_list_head, align 8, !tbaa !5
  %.not11 = icmp eq ptr %.010, null
  %.not9 = icmp eq ptr %1, null
  %or.cond = or i1 %.not11, %.not9
  br i1 %or.cond, label %._crit_edge, label %.lr.ph.split

.lr.ph.split:                                     ; preds = %3, %6
  %.012 = phi ptr [ %.0, %6 ], [ %.010, %3 ]
  %4 = tail call i32 %1(ptr noundef nonnull %0, ptr noundef nonnull %.012, ptr noundef %2) #1
  %5 = icmp slt i32 %4, 0
  br i1 %5, label %._crit_edge, label %6

6:                                                ; preds = %.lr.ph.split
  %7 = getelementptr inbounds i8, ptr %.012, i64 8
  %.0 = load ptr, ptr %7, align 8, !tbaa !5
  %.not = icmp eq ptr %.0, null
  br i1 %.not, label %._crit_edge, label %.lr.ph.split, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph.split, %6, %3
  %.07 = phi i32 [ 0, %3 ], [ 0, %6 ], [ -1, %.lr.ph.split ]
  ret i32 %.07
}

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 = { 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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyCFGPass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass