; LLVM IR from marcobambini/gravity :: src/utils (gravity_utils)

; 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.dirent = type { i64, i64, i16, i8, [256 x i8] }

; 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 ptr @directory_read(ptr noundef %0, ptr noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  %8 = load ptr, ptr %4, align 8, !tbaa !5
  %9 = icmp eq ptr %8, null
  br i1 %9, label %10, label %11

10:                                               ; preds = %2
  store ptr null, ptr %3, align 8
  br label %42

11:                                               ; preds = %2
  br label %12

12:                                               ; preds = %40, %11
  %13 = load ptr, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %14 = load ptr, ptr %4, align 8, !tbaa !5
  %15 = call ptr @readdir(ptr noundef %14)
  store ptr %15, ptr %6, align 8, !tbaa !5
  %16 = icmp eq ptr %15, null
  br i1 %16, label %17, label %20

17:                                               ; preds = %12
  %18 = load ptr, ptr %4, align 8, !tbaa !5
  %19 = call i32 @closedir(ptr noundef %18)
  store ptr null, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %40

20:                                               ; preds = %12
  %21 = load ptr, ptr %6, align 8, !tbaa !5
  %22 = getelementptr inbounds %struct.dirent, ptr %21, i32 0, i32 4
  %23 = getelementptr inbounds [256 x i8], ptr %22, i64 0, i64 0
  %24 = load i8, ptr %23, align 1, !tbaa !9
  %25 = sext i8 %24 to i32
  %26 = icmp eq i32 %25, 0
  br i1 %26, label %27, label %28

27:                                               ; preds = %20
  store i32 2, ptr %7, align 4
  br label %40

28:                                               ; preds = %20
  %29 = load ptr, ptr %6, align 8, !tbaa !5
  %30 = getelementptr inbounds %struct.dirent, ptr %29, i32 0, i32 4
  %31 = getelementptr inbounds [256 x i8], ptr %30, i64 0, i64 0
  %32 = load i8, ptr %31, align 1, !tbaa !9
  %33 = sext i8 %32 to i32
  %34 = icmp eq i32 %33, 46
  br i1 %34, label %35, label %36

35:                                               ; preds = %28
  store i32 2, ptr %7, align 4
  br label %40

36:                                               ; preds = %28
  %37 = load ptr, ptr %6, align 8, !tbaa !5
  %38 = getelementptr inbounds %struct.dirent, ptr %37, i32 0, i32 4
  %39 = getelementptr inbounds [256 x i8], ptr %38, i64 0, i64 0
  store ptr %39, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %40

40:                                               ; preds = %36, %35, %27, %17
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  %41 = load i32, ptr %7, align 4
  switch i32 %41, label %44 [
    i32 1, label %42
    i32 2, label %12
  ]

42:                                               ; preds = %40, %10
  %43 = load ptr, ptr %3, align 8
  ret ptr %43

44:                                               ; preds = %40
  unreachable
}

declare ptr @readdir(ptr noundef) #2

declare i32 @closedir(ptr noundef) #2

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 = { "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 = !{!7, !7, i64 0}


; 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 ptr @directory_read(ptr noundef %0, ptr nocapture noundef readnone %1) local_unnamed_addr #0 {
  %3 = icmp eq ptr %0, null
  br i1 %3, label %.thread, label %.preheader

.preheader:                                       ; preds = %2
  %4 = tail call ptr @readdir(ptr noundef nonnull %0) #3
  %5 = icmp eq ptr %4, null
  br i1 %5, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %10, %.preheader
  %6 = tail call i32 @closedir(ptr noundef nonnull %0)
  br label %.thread

.lr.ph:                                           ; preds = %.preheader, %10
  %7 = phi ptr [ %11, %10 ], [ %4, %.preheader ]
  %8 = getelementptr inbounds i8, ptr %7, i64 19
  %9 = load i8, ptr %8, align 1, !tbaa !5
  switch i8 %9, label %.thread.loopexit [
    i8 0, label %10
    i8 46, label %10
  ]

10:                                               ; preds = %.lr.ph, %.lr.ph
  %11 = tail call ptr @readdir(ptr noundef nonnull %0) #3
  %12 = icmp eq ptr %11, null
  br i1 %12, label %._crit_edge, label %.lr.ph

.thread.loopexit:                                 ; preds = %.lr.ph
  %13 = getelementptr inbounds i8, ptr %7, i64 19
  br label %.thread

.thread:                                          ; preds = %.thread.loopexit, %._crit_edge, %2
  %.2 = phi ptr [ null, %2 ], [ null, %._crit_edge ], [ %13, %.thread.loopexit ]
  ret ptr %.2
}

declare ptr @readdir(ptr noundef) local_unnamed_addr #1

; Function Attrs: nofree nounwind
declare noundef i32 @closedir(ptr nocapture noundef) 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 = { "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 = { nofree 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 #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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass