; LLVM IR from indygreg/python-zstandard :: zstd (zstd)

; 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.COVER_best_s = type { %union.pthread_mutex_t, %union.pthread_cond_t, i64, ptr, i64, %struct.ZDICT_cover_params_t, i64 }
%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 }
%union.pthread_cond_t = type { %struct.__pthread_cond_s }
%struct.__pthread_cond_s = type { %union.__atomic_wide_counter, %union.__atomic_wide_counter, [2 x i32], [2 x i32], i32, i32, [2 x i32] }
%union.__atomic_wide_counter = type { i64 }
%struct.ZDICT_cover_params_t = type { i32, i32, i32, i32, double, i32, i32, %struct.ZDICT_params_t }
%struct.ZDICT_params_t = type { i32, i32, i32 }

; Function Attrs: nounwind
declare i32 @pthread_mutex_init(ptr noundef, ptr noundef) #0

; Function Attrs: nounwind
declare i32 @pthread_cond_init(ptr noundef, ptr noundef) #0

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #1

; Function Attrs: nounwind uwtable
define dso_local void @COVER_best_init(ptr noundef %0) #2 {
  %2 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %3 = load ptr, ptr %2, align 8, !tbaa !5
  %4 = icmp eq ptr %3, null
  br i1 %4, label %5, label %6

5:                                                ; preds = %1
  br label %23

6:                                                ; preds = %1
  %7 = load ptr, ptr %2, align 8, !tbaa !5
  %8 = getelementptr inbounds %struct.COVER_best_s, ptr %7, i32 0, i32 0
  %9 = call i32 @pthread_mutex_init(ptr noundef %8, ptr noundef null) #3
  %10 = load ptr, ptr %2, align 8, !tbaa !5
  %11 = getelementptr inbounds %struct.COVER_best_s, ptr %10, i32 0, i32 1
  %12 = call i32 @pthread_cond_init(ptr noundef %11, ptr noundef null) #3
  %13 = load ptr, ptr %2, align 8, !tbaa !5
  %14 = getelementptr inbounds %struct.COVER_best_s, ptr %13, i32 0, i32 2
  store i64 0, ptr %14, align 8, !tbaa !9
  %15 = load ptr, ptr %2, align 8, !tbaa !5
  %16 = getelementptr inbounds %struct.COVER_best_s, ptr %15, i32 0, i32 3
  store ptr null, ptr %16, align 8, !tbaa !16
  %17 = load ptr, ptr %2, align 8, !tbaa !5
  %18 = getelementptr inbounds %struct.COVER_best_s, ptr %17, i32 0, i32 4
  store i64 0, ptr %18, align 8, !tbaa !17
  %19 = load ptr, ptr %2, align 8, !tbaa !5
  %20 = getelementptr inbounds %struct.COVER_best_s, ptr %19, i32 0, i32 6
  store i64 -1, ptr %20, align 8, !tbaa !18
  %21 = load ptr, ptr %2, align 8, !tbaa !5
  %22 = getelementptr inbounds %struct.COVER_best_s, ptr %21, i32 0, i32 5
  call void @llvm.memset.p0.i64(ptr align 8 %22, i8 0, i64 48, i1 false)
  br label %23

23:                                               ; preds = %6, %5
  ret void
}

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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
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 = { 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 88}
!10 = !{!"COVER_best_s", !7, i64 0, !7, i64 40, !11, i64 88, !6, i64 96, !11, i64 104, !12, i64 112, !11, i64 160}
!11 = !{!"long", !7, i64 0}
!12 = !{!"", !13, i64 0, !13, i64 4, !13, i64 8, !13, i64 12, !14, i64 16, !13, i64 24, !13, i64 28, !15, i64 32}
!13 = !{!"int", !7, i64 0}
!14 = !{!"double", !7, i64 0}
!15 = !{!"", !13, i64 0, !13, i64 4, !13, i64 8}
!16 = !{!10, !6, i64 96}
!17 = !{!10, !11, i64 104}
!18 = !{!10, !11, i64 160}


; 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
declare i32 @pthread_mutex_init(ptr noundef, ptr noundef) local_unnamed_addr #0

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

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #1

; Function Attrs: nounwind uwtable
define dso_local void @COVER_best_init(ptr noundef %0) local_unnamed_addr #2 {
  %2 = icmp eq ptr %0, null
  br i1 %2, label %10, label %3

3:                                                ; preds = %1
  %4 = tail call i32 @pthread_mutex_init(ptr noundef nonnull %0, ptr noundef null) #3
  %5 = getelementptr inbounds i8, ptr %0, i64 40
  %6 = tail call i32 @pthread_cond_init(ptr noundef nonnull %5, ptr noundef null) #3
  %7 = getelementptr inbounds i8, ptr %0, i64 88
  %8 = getelementptr inbounds i8, ptr %0, i64 160
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(24) %7, i8 0, i64 24, i1 false)
  store i64 -1, ptr %8, align 8, !tbaa !5
  %9 = getelementptr inbounds i8, ptr %0, i64 112
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(48) %9, i8 0, i64 48, i1 false)
  br label %10

10:                                               ; preds = %1, %3
  ret void
}

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 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }
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 = { 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, !9, i64 160}
!6 = !{!"COVER_best_s", !7, i64 0, !7, i64 40, !9, i64 88, !10, i64 96, !9, i64 104, !11, i64 112, !9, i64 160}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!"long", !7, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!"", !12, i64 0, !12, i64 4, !12, i64 8, !12, i64 12, !13, i64 16, !12, i64 24, !12, i64 28, !14, i64 32}
!12 = !{!"int", !7, i64 0}
!13 = !{!"double", !7, i64 0}
!14 = !{!"", !12, i64 0, !12, i64 4, !12, i64 8}


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