; LLVM IR from jingweizhanghuai/Morn :: src/util (morn_universal)

; 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.MHandle = type { i32, i32, 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 uwtable
define dso_local i32 @mHandleValid(ptr noundef %0) #1 {
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  %6 = load ptr, ptr %3, align 8, !tbaa !5
  %7 = getelementptr inbounds %struct.MHandle, ptr %6, i32 0, i32 1
  %8 = load volatile i32, ptr %7, align 4, !tbaa !9
  %9 = icmp eq i32 %8, 1
  br i1 %9, label %10, label %11

10:                                               ; preds = %1
  store i32 1, ptr %2, align 4
  br label %30

11:                                               ; preds = %1
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  %12 = load ptr, ptr %3, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct.MHandle, ptr %12, i32 0, i32 1
  %14 = cmpxchg ptr %13, i32 0, i32 -1 seq_cst seq_cst, align 4
  %15 = extractvalue { i32, i1 } %14, 1
  %16 = zext i1 %15 to i32
  store i32 %16, ptr %4, align 4, !tbaa !12
  %17 = load i32, ptr %4, align 4, !tbaa !12
  %18 = icmp eq i32 %17, 1
  br i1 %18, label %19, label %20

19:                                               ; preds = %11
  store i32 0, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %29

20:                                               ; preds = %11
  br label %21

21:                                               ; preds = %28, %20
  br label %22

22:                                               ; preds = %21
  %23 = load ptr, ptr %3, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.MHandle, ptr %23, i32 0, i32 1
  %25 = load volatile i32, ptr %24, align 4, !tbaa !9
  %26 = icmp eq i32 %25, 1
  br i1 %26, label %27, label %28

27:                                               ; preds = %22
  store i32 1, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %29

28:                                               ; preds = %22
  br label %21

29:                                               ; preds = %27, %19
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  br label %30

30:                                               ; preds = %29, %10
  %31 = load i32, ptr %2, align 4
  ret i32 %31
}

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, !11, i64 4}
!10 = !{!"MHandle", !11, i64 0, !11, i64 4, !6, i64 8, !6, i64 16}
!11 = !{!"int", !7, i64 0}
!12 = !{!11, !11, i64 0}


; 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: nofree norecurse nounwind memory(argmem: readwrite, inaccessiblemem: readwrite) uwtable
define dso_local range(i32 0, 2) i32 @mHandleValid(ptr noundef %0) local_unnamed_addr #0 {
  %2 = getelementptr inbounds i8, ptr %0, i64 4
  %3 = load volatile i32, ptr %2, align 4, !tbaa !5
  %4 = icmp eq i32 %3, 1
  br i1 %4, label %.loopexit, label %5

5:                                                ; preds = %1
  %6 = cmpxchg ptr %2, i32 0, i32 -1 seq_cst seq_cst, align 4
  %7 = extractvalue { i32, i1 } %6, 1
  br i1 %7, label %.loopexit, label %.preheader

.preheader:                                       ; preds = %5, %.preheader
  %8 = load volatile i32, ptr %2, align 4, !tbaa !5
  %9 = icmp eq i32 %8, 1
  br i1 %9, label %.loopexit, label %.preheader

.loopexit:                                        ; preds = %.preheader, %5, %1
  %.1 = phi i32 [ 1, %1 ], [ 0, %5 ], [ 1, %.preheader ]
  ret i32 %.1
}

attributes #0 = { nofree norecurse nounwind memory(argmem: readwrite, inaccessiblemem: readwrite) 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" }

!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 4}
!6 = !{!"MHandle", !7, i64 0, !7, i64 4, !10, i64 8, !10, i64 16}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass