; LLVM IR from specinfo-ua/UAPKI :: library/uapkic/src (ec-cache)

; 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"

%union.pthread_mutex_t = type { %struct.__pthread_mutex_s }
%struct.__pthread_mutex_s = type { i32, i32, i32, i32, i32, i16, i16, %struct.__pthread_internal_list }
%struct.__pthread_internal_list = type { ptr, ptr }
%struct.EcCache_st = type { i32, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr }

@ec_cache_mutex = external hidden global %union.pthread_mutex_t, align 8
@ec_cache = external hidden global ptr, align 8

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

; Function Attrs: nounwind
declare i32 @pthread_mutex_lock(ptr noundef) #1

; Function Attrs: nounwind
declare i32 @pthread_mutex_unlock(ptr noundef) #1

; Function Attrs: nounwind uwtable
declare hidden void @ec_cache_item_free(ptr noundef) #2

; 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 @ec_cache_free() #2 {
  %1 = alloca ptr, align 8
  %2 = alloca ptr, align 8
  %3 = call i32 @pthread_mutex_lock(ptr noundef @ec_cache_mutex) #4
  %4 = call i32 @sleep(i32 noundef 1)
  %5 = load ptr, ptr @ec_cache, align 8, !tbaa !5
  %6 = icmp ne ptr %5, null
  br i1 %6, label %7, label %19

7:                                                ; preds = %0
  call void @llvm.lifetime.start.p0(i64 8, ptr %1) #4
  %8 = load ptr, ptr @ec_cache, align 8, !tbaa !5
  store ptr %8, ptr %1, align 8, !tbaa !5
  store ptr null, ptr @ec_cache, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #4
  br label %9

9:                                                ; preds = %12, %7
  %10 = load ptr, ptr %1, align 8, !tbaa !5
  %11 = icmp ne ptr %10, null
  br i1 %11, label %12, label %18

12:                                               ; preds = %9
  %13 = load ptr, ptr %1, align 8, !tbaa !5
  store ptr %13, ptr %2, align 8, !tbaa !5
  %14 = load ptr, ptr %2, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct.EcCache_st, ptr %14, i32 0, i32 8
  %16 = load ptr, ptr %15, align 8, !tbaa !9
  store ptr %16, ptr %1, align 8, !tbaa !5
  %17 = load ptr, ptr %2, align 8, !tbaa !5
  call void @ec_cache_item_free(ptr noundef %17)
  br label %9, !llvm.loop !12

18:                                               ; preds = %9
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %1) #4
  br label %19

19:                                               ; preds = %18, %0
  %20 = call i32 @pthread_mutex_unlock(ptr noundef @ec_cache_mutex) #4
  ret void
}

declare i32 @sleep(i32 noundef) #3

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nounwind "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 = { "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, !6, i64 64}
!10 = !{!"EcCache_st", !11, i64 0, !6, i64 8, !6, i64 16, !6, i64 24, !6, i64 32, !6, i64 40, !6, i64 48, !6, i64 56, !6, i64 64}
!11 = !{!"int", !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"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"

%union.pthread_mutex_t = type { %struct.__pthread_mutex_s }
%struct.__pthread_mutex_s = type { i32, i32, i32, i32, i32, i16, i16, %struct.__pthread_internal_list }
%struct.__pthread_internal_list = type { ptr, ptr }

@ec_cache_mutex = external hidden global %union.pthread_mutex_t, align 8
@ec_cache = external hidden local_unnamed_addr global ptr, align 8

; Function Attrs: nounwind
declare i32 @pthread_mutex_lock(ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind
declare i32 @pthread_mutex_unlock(ptr noundef) local_unnamed_addr #0

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

; Function Attrs: nounwind uwtable
define dso_local void @ec_cache_free() local_unnamed_addr #1 {
  %1 = tail call i32 @pthread_mutex_lock(ptr noundef nonnull @ec_cache_mutex) #3
  %2 = tail call i32 @sleep(i32 noundef 1) #3
  %3 = load ptr, ptr @ec_cache, align 8, !tbaa !5
  %.not = icmp eq ptr %3, null
  br i1 %.not, label %.loopexit, label %4

4:                                                ; preds = %0
  store ptr null, ptr @ec_cache, align 8, !tbaa !5
  br label %5

5:                                                ; preds = %4, %5
  %.06 = phi ptr [ %3, %4 ], [ %7, %5 ]
  %6 = getelementptr inbounds i8, ptr %.06, i64 64
  %7 = load ptr, ptr %6, align 8, !tbaa !9
  tail call void @ec_cache_item_free(ptr noundef nonnull %.06)
  %.not5 = icmp eq ptr %7, null
  br i1 %.not5, label %.loopexit, label %5, !llvm.loop !12

.loopexit:                                        ; preds = %5, %0
  %8 = tail call i32 @pthread_mutex_unlock(ptr noundef nonnull @ec_cache_mutex) #3
  ret void
}

declare i32 @sleep(i32 noundef) local_unnamed_addr #2

attributes #0 = { nounwind "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 = { "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 64}
!10 = !{!"EcCache_st", !11, i64 0, !6, i64 8, !6, i64 16, !6, i64 24, !6, i64 32, !6, i64 40, !6, i64 48, !6, i64 56, !6, i64 64}
!11 = !{!"int", !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass