; LLVM IR from seppo0010/rlite :: src (flock_posix)

; 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"

; Function Attrs: nounwind uwtable
define dso_local i32 @rl_flock(ptr noundef %0, i32 noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  %10 = call i32 @fileno(ptr noundef %9) #3
  store i32 %10, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %11 = load i32, ptr %5, align 4, !tbaa !9
  %12 = icmp eq i32 %11, 1
  br i1 %12, label %13, label %14

13:                                               ; preds = %2
  store i32 1, ptr %7, align 4, !tbaa !9
  br label %25

14:                                               ; preds = %2
  %15 = load i32, ptr %5, align 4, !tbaa !9
  %16 = icmp eq i32 %15, 2
  br i1 %16, label %17, label %18

17:                                               ; preds = %14
  store i32 2, ptr %7, align 4, !tbaa !9
  br label %24

18:                                               ; preds = %14
  %19 = load i32, ptr %5, align 4, !tbaa !9
  %20 = icmp eq i32 %19, 3
  br i1 %20, label %21, label %22

21:                                               ; preds = %18
  store i32 8, ptr %7, align 4, !tbaa !9
  br label %23

22:                                               ; preds = %18
  store i32 6, ptr %3, align 4
  store i32 1, ptr %8, align 4
  br label %32

23:                                               ; preds = %21
  br label %24

24:                                               ; preds = %23, %17
  br label %25

25:                                               ; preds = %24, %13
  %26 = load i32, ptr %6, align 4, !tbaa !9
  %27 = load i32, ptr %7, align 4, !tbaa !9
  %28 = call i32 @flock(i32 noundef %26, i32 noundef %27) #3
  %29 = icmp eq i32 %28, 0
  br i1 %29, label %30, label %31

30:                                               ; preds = %25
  store i32 0, ptr %3, align 4
  store i32 1, ptr %8, align 4
  br label %32

31:                                               ; preds = %25
  store i32 6, ptr %3, align 4
  store i32 1, ptr %8, align 4
  br label %32

32:                                               ; preds = %31, %30, %22
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  %33 = load i32, ptr %3, align 4
  ret i32 %33
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nounwind
declare i32 @fileno(ptr noundef) #2

; Function Attrs: nounwind
declare i32 @flock(i32 noundef, i32 noundef) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !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"

@switch.table.rl_flock = private unnamed_addr constant [3 x i32] [i32 1, i32 2, i32 8], align 4

; Function Attrs: nounwind uwtable
define dso_local range(i32 0, 7) i32 @rl_flock(ptr nocapture noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = tail call i32 @fileno(ptr noundef %0) #3
  %switch.tableidx = add i32 %1, -1
  %4 = icmp ult i32 %switch.tableidx, 3
  br i1 %4, label %switch.lookup, label %8

switch.lookup:                                    ; preds = %2
  %5 = zext nneg i32 %switch.tableidx to i64
  %switch.gep = getelementptr inbounds [3 x i32], ptr @switch.table.rl_flock, i64 0, i64 %5
  %switch.load = load i32, ptr %switch.gep, align 4
  %6 = tail call i32 @flock(i32 noundef %3, i32 noundef %switch.load) #3
  %7 = icmp eq i32 %6, 0
  %. = select i1 %7, i32 0, i32 6
  br label %8

8:                                                ; preds = %2, %switch.lookup
  %.06 = phi i32 [ 6, %2 ], [ %., %switch.lookup ]
  ret i32 %.06
}

; Function Attrs: nofree nounwind
declare noundef i32 @fileno(ptr nocapture noundef) local_unnamed_addr #1

; Function Attrs: nounwind
declare i32 @flock(i32 noundef, i32 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 = { 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 #2 = { 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)"}


; Effective O3 passes: GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass