; LLVM IR from pandax381/microps :: net (net_shutdown)

; 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.net_device = type { ptr, ptr, i32, [16 x i8], i16, i16, i16, i16, i16, [16 x i8], %union.anon, ptr, ptr }
%union.anon = type { [16 x i8] }

@stderr = external global ptr, align 8
@.str = external hidden unnamed_addr constant [57 x i8], align 1
@devices = external hidden global ptr, align 8
@__func__.net_shutdown = external hidden unnamed_addr constant [13 x i8], align 1
@.str.19 = external hidden unnamed_addr constant [21 x i8], align 1
@.str.20 = external hidden unnamed_addr constant [9 x i8], align 1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

declare i32 @lprintf(ptr noundef, i32 noundef, ptr noundef, i32 noundef, ptr noundef, ptr noundef, ...) #1

; 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 void @net_shutdown() #2 {
  %1 = alloca ptr, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %1) #3
  %2 = load ptr, ptr @stderr, align 8, !tbaa !5
  %3 = call i32 (ptr, i32, ptr, i32, ptr, ptr, ...) @lprintf(ptr noundef %2, i32 noundef 68, ptr noundef @.str, i32 noundef 354, ptr noundef @__func__.net_shutdown, ptr noundef @.str.19)
  %4 = load ptr, ptr @devices, align 8, !tbaa !5
  store ptr %4, ptr %1, align 8, !tbaa !5
  br label %5

5:                                                ; preds = %11, %0
  %6 = load ptr, ptr %1, align 8, !tbaa !5
  %7 = icmp ne ptr %6, null
  br i1 %7, label %8, label %15

8:                                                ; preds = %5
  %9 = load ptr, ptr %1, align 8, !tbaa !5
  %10 = call i32 @net_device_close(ptr noundef %9)
  br label %11

11:                                               ; preds = %8
  %12 = load ptr, ptr %1, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct.net_device, ptr %12, i32 0, i32 0
  %14 = load ptr, ptr %13, align 8, !tbaa !9
  store ptr %14, ptr %1, align 8, !tbaa !5
  br label %5, !llvm.loop !13

15:                                               ; preds = %5
  %16 = load ptr, ptr @stderr, align 8, !tbaa !5
  %17 = call i32 (ptr, i32, ptr, i32, ptr, ptr, ...) @lprintf(ptr noundef %16, i32 noundef 68, ptr noundef @.str, i32 noundef 358, ptr noundef @__func__.net_shutdown, ptr noundef @.str.20)
  call void @llvm.lifetime.end.p0(i64 8, ptr %1) #3
  ret void
}

; Function Attrs: nounwind uwtable
declare hidden i32 @net_device_close(ptr noundef) #2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { "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 = !{!"net_device", !6, i64 0, !6, i64 8, !11, i64 16, !7, i64 20, !12, i64 36, !12, i64 38, !12, i64 40, !12, i64 42, !12, i64 44, !7, i64 46, !7, i64 62, !6, i64 80, !6, i64 88}
!11 = !{!"int", !7, i64 0}
!12 = !{!"short", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"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"

@stderr = external local_unnamed_addr global ptr, align 8
@.str = external hidden unnamed_addr constant [57 x i8], align 1
@devices = external hidden local_unnamed_addr global ptr, align 8
@__func__.net_shutdown = external hidden unnamed_addr constant [13 x i8], align 1
@.str.19 = external hidden unnamed_addr constant [21 x i8], align 1
@.str.20 = external hidden unnamed_addr constant [9 x i8], align 1

declare i32 @lprintf(ptr noundef, i32 noundef, ptr noundef, i32 noundef, ptr noundef, ptr noundef, ...) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @net_shutdown() local_unnamed_addr #1 {
  %1 = load ptr, ptr @stderr, align 8, !tbaa !5
  %2 = tail call i32 (ptr, i32, ptr, i32, ptr, ptr, ...) @lprintf(ptr noundef %1, i32 noundef 68, ptr noundef nonnull @.str, i32 noundef 354, ptr noundef nonnull @__func__.net_shutdown, ptr noundef nonnull @.str.19) #2
  %.03 = load ptr, ptr @devices, align 8, !tbaa !5
  %.not4 = icmp eq ptr %.03, null
  br i1 %.not4, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %0, %.lr.ph
  %.05 = phi ptr [ %.0, %.lr.ph ], [ %.03, %0 ]
  %3 = tail call i32 @net_device_close(ptr noundef nonnull %.05)
  %.0 = load ptr, ptr %.05, align 8, !tbaa !5
  %.not = icmp eq ptr %.0, null
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %0
  %4 = load ptr, ptr @stderr, align 8, !tbaa !5
  %5 = tail call i32 (ptr, i32, ptr, i32, ptr, ptr, ...) @lprintf(ptr noundef %4, i32 noundef 68, ptr noundef nonnull @.str, i32 noundef 358, ptr noundef nonnull @__func__.net_shutdown, ptr noundef nonnull @.str.20) #2
  ret void
}

; Function Attrs: nounwind uwtable
declare hidden i32 @net_device_close(ptr noundef) local_unnamed_addr #1

attributes #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, !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: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass