; LLVM IR from narke/Aragveli :: src/kernel/process (semaphore)

; 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.semaphore_t = type { i64, %struct.anon }
%struct.anon = type { ptr, ptr }

; Function Attrs: nounwind uwtable
define dso_local ptr @semaphore_create(i64 noundef %0) #0 {
  %2 = alloca ptr, align 8
  %3 = alloca i64, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  store i64 %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %6 = call ptr @malloc(i64 noundef 24) #4
  store ptr %6, ptr %4, align 8, !tbaa !9
  %7 = load ptr, ptr %4, align 8, !tbaa !9
  %8 = icmp ne ptr %7, null
  br i1 %8, label %10, label %9

9:                                                ; preds = %1
  store ptr null, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %27

10:                                               ; preds = %1
  %11 = load i64, ptr %3, align 8, !tbaa !5
  %12 = load ptr, ptr %4, align 8, !tbaa !9
  %13 = getelementptr inbounds %struct.semaphore_t, ptr %12, i32 0, i32 0
  store volatile i64 %11, ptr %13, align 8, !tbaa !11
  br label %14

14:                                               ; preds = %10
  %15 = load ptr, ptr %4, align 8, !tbaa !9
  %16 = getelementptr inbounds %struct.semaphore_t, ptr %15, i32 0, i32 1
  %17 = getelementptr inbounds %struct.anon, ptr %16, i32 0, i32 0
  store ptr null, ptr %17, align 8, !tbaa !14
  %18 = load ptr, ptr %4, align 8, !tbaa !9
  %19 = getelementptr inbounds %struct.semaphore_t, ptr %18, i32 0, i32 1
  %20 = getelementptr inbounds %struct.anon, ptr %19, i32 0, i32 0
  %21 = load ptr, ptr %4, align 8, !tbaa !9
  %22 = getelementptr inbounds %struct.semaphore_t, ptr %21, i32 0, i32 1
  %23 = getelementptr inbounds %struct.anon, ptr %22, i32 0, i32 1
  store ptr %20, ptr %23, align 8, !tbaa !15
  br label %24

24:                                               ; preds = %14
  br label %25

25:                                               ; preds = %24
  %26 = load ptr, ptr %4, align 8, !tbaa !9
  store ptr %26, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %27

27:                                               ; preds = %25, %9
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  %28 = load ptr, ptr %2, align 8
  ret ptr %28
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: allocsize(0)
declare ptr @malloc(i64 noundef) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { allocsize(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 }
attributes #4 = { allocsize(0) }

!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 = !{!"long", !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 = !{!12, !6, i64 0}
!12 = !{!"", !6, i64 0, !13, i64 8}
!13 = !{!"", !10, i64 0, !10, i64 8}
!14 = !{!12, !10, i64 8}
!15 = !{!12, !10, i64 16}


; 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 nounwind memory(readwrite, argmem: none) uwtable
define dso_local noundef ptr @semaphore_create(i64 noundef %0) local_unnamed_addr #0 {
  %2 = tail call dereferenceable_or_null(24) ptr @malloc(i64 noundef 24) #2
  %.not = icmp eq ptr %2, null
  br i1 %.not, label %6, label %3

3:                                                ; preds = %1
  store volatile i64 %0, ptr %2, align 8, !tbaa !5
  %4 = getelementptr inbounds i8, ptr %2, i64 8
  store ptr null, ptr %4, align 8, !tbaa !12
  %5 = getelementptr inbounds i8, ptr %2, i64 16
  store ptr %4, ptr %5, align 8, !tbaa !13
  br label %6

6:                                                ; preds = %1, %3
  ret ptr %2
}

; Function Attrs: mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @malloc(i64 noundef) local_unnamed_addr #1

attributes #0 = { nofree nounwind memory(readwrite, argmem: none) 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 = { mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite) "alloc-family"="malloc" "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 = { allocsize(0) }

!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 0}
!6 = !{!"", !7, i64 0, !10, i64 8}
!7 = !{!"long", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"", !11, i64 0, !11, i64 8}
!11 = !{!"any pointer", !8, i64 0}
!12 = !{!6, !11, i64 8}
!13 = !{!6, !11, i64 16}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass