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

; 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.mutex_t = type { ptr, i64, %struct.anon }
%struct.anon = type { ptr, ptr }
%struct.thread = type { i32, i64, [32 x i8], i32, ptr, i8, %struct.anon.0 }
%struct.anon.0 = type { 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 @mutex_lock(ptr noundef %0) #1 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #4
  store i32 0, ptr %3, align 4, !tbaa !9
  %5 = load ptr, ptr %2, align 8, !tbaa !5
  %6 = getelementptr inbounds %struct.mutex_t, ptr %5, i32 0, i32 1
  %7 = load volatile i64, ptr %6, align 8, !tbaa !11
  call void @atomic_inc(i64 noundef %7)
  %8 = load ptr, ptr %2, align 8, !tbaa !5
  %9 = getelementptr inbounds %struct.mutex_t, ptr %8, i32 0, i32 0
  %10 = load ptr, ptr %9, align 8, !tbaa !15
  %11 = icmp ne ptr %10, null
  br i1 %11, label %12, label %46

12:                                               ; preds = %1
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #4
  %13 = call ptr @thread_get_current()
  store ptr %13, ptr %4, align 8, !tbaa !5
  %14 = load ptr, ptr %2, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct.mutex_t, ptr %14, i32 0, i32 0
  %16 = load ptr, ptr %15, align 8, !tbaa !15
  %17 = load ptr, ptr %4, align 8, !tbaa !5
  %18 = icmp eq ptr %16, %17
  br i1 %18, label %19, label %20

19:                                               ; preds = %12
  store i32 -4, ptr %3, align 4, !tbaa !9
  br label %45

20:                                               ; preds = %12
  br label %21

21:                                               ; preds = %20
  %22 = load ptr, ptr %4, align 8, !tbaa !5
  %23 = getelementptr inbounds %struct.thread, ptr %22, i32 0, i32 6
  %24 = getelementptr inbounds %struct.anon.0, ptr %23, i32 0, i32 0
  store ptr null, ptr %24, align 8, !tbaa !16
  %25 = load ptr, ptr %2, align 8, !tbaa !5
  %26 = getelementptr inbounds %struct.mutex_t, ptr %25, i32 0, i32 2
  %27 = getelementptr inbounds %struct.anon, ptr %26, i32 0, i32 1
  %28 = load ptr, ptr %27, align 8, !tbaa !18
  %29 = load ptr, ptr %4, align 8, !tbaa !5
  %30 = getelementptr inbounds %struct.thread, ptr %29, i32 0, i32 6
  %31 = getelementptr inbounds %struct.anon.0, ptr %30, i32 0, i32 1
  store ptr %28, ptr %31, align 8, !tbaa !19
  %32 = load ptr, ptr %4, align 8, !tbaa !5
  %33 = load ptr, ptr %2, align 8, !tbaa !5
  %34 = getelementptr inbounds %struct.mutex_t, ptr %33, i32 0, i32 2
  %35 = getelementptr inbounds %struct.anon, ptr %34, i32 0, i32 1
  %36 = load ptr, ptr %35, align 8, !tbaa !18
  store ptr %32, ptr %36, align 8, !tbaa !5
  %37 = load ptr, ptr %4, align 8, !tbaa !5
  %38 = getelementptr inbounds %struct.thread, ptr %37, i32 0, i32 6
  %39 = getelementptr inbounds %struct.anon.0, ptr %38, i32 0, i32 0
  %40 = load ptr, ptr %2, align 8, !tbaa !5
  %41 = getelementptr inbounds %struct.mutex_t, ptr %40, i32 0, i32 2
  %42 = getelementptr inbounds %struct.anon, ptr %41, i32 0, i32 1
  store ptr %39, ptr %42, align 8, !tbaa !18
  br label %43

43:                                               ; preds = %21
  br label %44

44:                                               ; preds = %43
  br label %45

45:                                               ; preds = %44, %19
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #4
  br label %46

46:                                               ; preds = %45, %1
  %47 = load i32, ptr %3, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #4
  ret i32 %47
}

; Function Attrs: inlinehint nounwind uwtable
declare hidden void @atomic_inc(i64 noundef) #2

declare ptr @thread_get_current() #3

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 = { inlinehint 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 = { "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 #4 = { 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, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !13, i64 8}
!12 = !{!"", !6, i64 0, !13, i64 8, !14, i64 16}
!13 = !{!"long", !7, i64 0}
!14 = !{!"", !6, i64 0, !6, i64 8}
!15 = !{!12, !6, i64 0}
!16 = !{!17, !6, i64 72}
!17 = !{!"thread", !10, i64 0, !13, i64 8, !7, i64 16, !10, i64 48, !6, i64 56, !7, i64 64, !14, i64 72}
!18 = !{!12, !6, i64 24}
!19 = !{!17, !6, i64 80}


; 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 -4, 1) i32 @mutex_lock(ptr noundef %0) local_unnamed_addr #0 {
  %2 = getelementptr inbounds i8, ptr %0, i64 8
  %3 = load volatile i64, ptr %2, align 8, !tbaa !5
  tail call void @atomic_inc(i64 noundef %3)
  %4 = load ptr, ptr %0, align 8, !tbaa !12
  %.not = icmp eq ptr %4, null
  br i1 %.not, label %14, label %5

5:                                                ; preds = %1
  %6 = tail call ptr @thread_get_current() #3
  %7 = load ptr, ptr %0, align 8, !tbaa !12
  %8 = icmp eq ptr %7, %6
  br i1 %8, label %14, label %9

9:                                                ; preds = %5
  %10 = getelementptr inbounds i8, ptr %6, i64 72
  store ptr null, ptr %10, align 8, !tbaa !13
  %11 = getelementptr inbounds i8, ptr %0, i64 24
  %12 = load ptr, ptr %11, align 8, !tbaa !16
  %13 = getelementptr inbounds i8, ptr %6, i64 80
  store ptr %12, ptr %13, align 8, !tbaa !17
  store ptr %6, ptr %12, align 8, !tbaa !18
  store ptr %10, ptr %11, align 8, !tbaa !16
  br label %14

14:                                               ; preds = %9, %5, %1
  %.1 = phi i32 [ 0, %1 ], [ 0, %9 ], [ -4, %5 ]
  ret i32 %.1
}

; Function Attrs: inlinehint nounwind uwtable
declare hidden void @atomic_inc(i64 noundef) local_unnamed_addr #1

declare ptr @thread_get_current() local_unnamed_addr #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 = { inlinehint 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 = { "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, !10, i64 8}
!6 = !{!"", !7, i64 0, !10, i64 8, !11, i64 16}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"long", !8, i64 0}
!11 = !{!"", !7, i64 0, !7, i64 8}
!12 = !{!6, !7, i64 0}
!13 = !{!14, !7, i64 72}
!14 = !{!"thread", !15, i64 0, !10, i64 8, !8, i64 16, !15, i64 48, !7, i64 56, !8, i64 64, !11, i64 72}
!15 = !{!"int", !8, i64 0}
!16 = !{!6, !7, i64 24}
!17 = !{!14, !7, i64 80}
!18 = !{!7, !7, i64 0}


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