; LLVM IR from asllop/AppOS :: core/sys (sys)

; 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"

; Function Attrs: nounwind uwtable
define dso_local i32 @core_lock(i32 noundef %0) #0 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  store i32 %0, ptr %3, align 4, !tbaa !5
  %6 = call zeroext i1 (...) @get_scheduling()
  br i1 %6, label %8, label %7

7:                                                ; preds = %1
  store i32 -507, ptr %2, align 4
  br label %20

8:                                                ; preds = %1
  call void (...) @core_forbid()
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  %9 = load i32, ptr %3, align 4, !tbaa !5
  %10 = call i32 @get_counter(i32 noundef %9)
  store i32 %10, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  %11 = load i32, ptr %3, align 4, !tbaa !5
  %12 = call ptr @get_lock(i32 noundef %11)
  store ptr %12, ptr %5, align 8, !tbaa !9
  call void (...) @core_permit()
  br label %13

13:                                               ; preds = %18, %8
  %14 = load ptr, ptr %5, align 8, !tbaa !9
  %15 = load i32, ptr %14, align 4, !tbaa !5
  %16 = load i32, ptr %4, align 4, !tbaa !5
  %17 = icmp ne i32 %15, %16
  br i1 %17, label %18, label %19

18:                                               ; preds = %13
  call void @core_sleep(i64 noundef 0)
  br label %13, !llvm.loop !11

19:                                               ; preds = %13
  store i32 0, ptr %2, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  br label %20

20:                                               ; preds = %19, %7
  %21 = load i32, ptr %2, align 4
  ret i32 %21
}

declare zeroext i1 @get_scheduling(...) #1

declare void @core_forbid(...) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

declare i32 @get_counter(i32 noundef) #1

declare ptr @get_lock(i32 noundef) #1

declare void @core_permit(...) #1

declare void @core_sleep(i64 noundef) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

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 = { "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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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 range(i32 -507, 1) i32 @core_lock(i32 noundef %0) local_unnamed_addr #0 {
  %2 = tail call zeroext i1 (...) @get_scheduling() #2
  br i1 %2, label %3, label %.loopexit

3:                                                ; preds = %1
  tail call void (...) @core_forbid() #2
  %4 = tail call i32 @get_counter(i32 noundef %0) #2
  %5 = tail call ptr @get_lock(i32 noundef %0) #2
  tail call void (...) @core_permit() #2
  %6 = load i32, ptr %5, align 4, !tbaa !5
  %.not4 = icmp eq i32 %6, %4
  br i1 %.not4, label %.loopexit, label %.lr.ph

.lr.ph:                                           ; preds = %3, %.lr.ph
  tail call void @core_sleep(i64 noundef 0) #2
  %7 = load i32, ptr %5, align 4, !tbaa !5
  %.not = icmp eq i32 %7, %4
  br i1 %.not, label %.loopexit, label %.lr.ph, !llvm.loop !9

.loopexit:                                        ; preds = %.lr.ph, %3, %1
  %.0 = phi i32 [ -507, %1 ], [ 0, %3 ], [ 0, %.lr.ph ]
  ret i32 %.0
}

declare zeroext i1 @get_scheduling(...) local_unnamed_addr #1

declare void @core_forbid(...) local_unnamed_addr #1

declare i32 @get_counter(i32 noundef) local_unnamed_addr #1

declare ptr @get_lock(i32 noundef) local_unnamed_addr #1

declare void @core_permit(...) local_unnamed_addr #1

declare void @core_sleep(i64 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 = { "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 = !{!"int", !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: GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass