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

; 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.ErrorsCtx_st = type { ptr, ptr }

@errors_mutex = external hidden global %union.pthread_mutex_t, align 8
@errors_list = 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: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.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 @errors_free(ptr noundef) #2

; Function Attrs: nounwind uwtable
define dso_local void @stacktrace_finalize() #2 {
  %1 = alloca ptr, align 8
  %2 = alloca ptr, align 8
  %3 = call i32 @pthread_mutex_lock(ptr noundef @errors_mutex) #3
  %4 = load ptr, ptr @errors_list, align 8, !tbaa !5
  %5 = icmp ne ptr %4, null
  br i1 %5, label %6, label %18

6:                                                ; preds = %0
  call void @llvm.lifetime.start.p0(i64 8, ptr %1) #3
  %7 = load ptr, ptr @errors_list, align 8, !tbaa !5
  store ptr %7, ptr %1, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #3
  br label %8

8:                                                ; preds = %11, %6
  %9 = load ptr, ptr %1, align 8, !tbaa !5
  %10 = icmp ne ptr %9, null
  br i1 %10, label %11, label %17

11:                                               ; preds = %8
  %12 = load ptr, ptr %1, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct.ErrorsCtx_st, ptr %12, i32 0, i32 1
  %14 = load ptr, ptr %13, align 8, !tbaa !9
  store ptr %14, ptr %2, align 8, !tbaa !5
  %15 = load ptr, ptr %1, align 8, !tbaa !5
  call void @errors_free(ptr noundef %15)
  %16 = load ptr, ptr %2, align 8, !tbaa !5
  store ptr %16, ptr %1, align 8, !tbaa !5
  br label %8, !llvm.loop !11

17:                                               ; preds = %8
  store ptr null, ptr @errors_list, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %1) #3
  br label %18

18:                                               ; preds = %17, %0
  %19 = call i32 @pthread_mutex_unlock(ptr noundef @errors_mutex) #3
  ret void
}

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 = { 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 8}
!10 = !{!"ErrorsCtx_st", !6, i64 0, !6, i64 8}
!11 = distinct !{!11, !12}
!12 = !{!"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 }

@errors_mutex = external hidden global %union.pthread_mutex_t, align 8
@errors_list = 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 @errors_free(ptr noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local void @stacktrace_finalize() local_unnamed_addr #1 {
  %1 = tail call i32 @pthread_mutex_lock(ptr noundef nonnull @errors_mutex) #2
  %2 = load ptr, ptr @errors_list, align 8, !tbaa !5
  %.not = icmp eq ptr %2, null
  br i1 %.not, label %6, label %.preheader

.preheader:                                       ; preds = %0, %.preheader
  %.06 = phi ptr [ %4, %.preheader ], [ %2, %0 ]
  %3 = getelementptr inbounds i8, ptr %.06, i64 8
  %4 = load ptr, ptr %3, align 8, !tbaa !9
  tail call void @errors_free(ptr noundef nonnull %.06)
  %.not5 = icmp eq ptr %4, null
  br i1 %.not5, label %5, label %.preheader, !llvm.loop !11

5:                                                ; preds = %.preheader
  store ptr null, ptr @errors_list, align 8, !tbaa !5
  br label %6

6:                                                ; preds = %5, %0
  %7 = tail call i32 @pthread_mutex_unlock(ptr noundef nonnull @errors_mutex) #2
  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 = { 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 = { 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 8}
!10 = !{!"ErrorsCtx_st", !6, i64 0, !6, i64 8}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


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