; 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_lock(ptr noundef) #0

declare i32 @pthread_cond_wait(ptr noundef, ptr noundef) #1

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

; Function Attrs: nounwind uwtable
define dso_local void @COVER_best_wait(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 ne ptr %3, null
  br i1 %4, label %6, label %5

5:                                                ; preds = %1
  br label %25

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_lock(ptr noundef %8) #3
  br label %10

10:                                               ; preds = %15, %6
  %11 = load ptr, ptr %2, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.COVER_best_s, ptr %11, i32 0, i32 2
  %13 = load i64, ptr %12, align 8, !tbaa !9
  %14 = icmp ne i64 %13, 0
  br i1 %14, label %15, label %21

15:                                               ; preds = %10
  %16 = load ptr, ptr %2, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.COVER_best_s, ptr %16, i32 0, i32 1
  %18 = load ptr, ptr %2, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct.COVER_best_s, ptr %18, i32 0, i32 0
  %20 = call i32 @pthread_cond_wait(ptr noundef %17, ptr noundef %19)
  br label %10, !llvm.loop !16

21:                                               ; preds = %10
  %22 = load ptr, ptr %2, align 8, !tbaa !5
  %23 = getelementptr inbounds %struct.COVER_best_s, ptr %22, i32 0, i32 0
  %24 = call i32 @pthread_mutex_unlock(ptr noundef %23) #3
  br label %25

25:                                               ; preds = %21, %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 = { "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 = { 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 = distinct !{!16, !17}
!17 = !{!"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"

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

declare i32 @pthread_cond_wait(ptr noundef, ptr noundef) local_unnamed_addr #1

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

; Function Attrs: nounwind uwtable
define dso_local void @COVER_best_wait(ptr noundef %0) local_unnamed_addr #2 {
  %.not = icmp eq ptr %0, null
  br i1 %.not, label %11, label %2

2:                                                ; preds = %1
  %3 = tail call i32 @pthread_mutex_lock(ptr noundef nonnull %0) #3
  %4 = getelementptr inbounds i8, ptr %0, i64 88
  %5 = load i64, ptr %4, align 8, !tbaa !5
  %.not67 = icmp eq i64 %5, 0
  br i1 %.not67, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2
  %6 = getelementptr inbounds i8, ptr %0, i64 40
  br label %7

7:                                                ; preds = %.lr.ph, %7
  %8 = tail call i32 @pthread_cond_wait(ptr noundef nonnull %6, ptr noundef nonnull %0) #3
  %9 = load i64, ptr %4, align 8, !tbaa !5
  %.not6 = icmp eq i64 %9, 0
  br i1 %.not6, label %._crit_edge, label %7, !llvm.loop !15

._crit_edge:                                      ; preds = %7, %2
  %10 = tail call i32 @pthread_mutex_unlock(ptr noundef nonnull %0) #3
  br label %11

11:                                               ; preds = %1, %._crit_edge
  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 = { "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 = { 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 88}
!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}
!15 = distinct !{!15, !16}
!16 = !{!"llvm.loop.mustprogress"}


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