; LLVM IR from rolinh/dfc :: src (util)

; 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"

@stderr = external global ptr, align 8
@.str.13 = external hidden unnamed_addr constant [25 x i8], align 1
@.str.14 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind willreturn memory(read)
declare i64 @strlen(ptr noundef) #1

; 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 noalias ptr @strdup(ptr noundef) #2

declare i32 @fputs(ptr noundef, ptr noundef) #3

; Function Attrs: nounwind uwtable
define dso_local i32 @fsfilter(ptr noundef %0, ptr noundef %1, i32 noundef %2) #4 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca ptr, align 8
  %9 = alloca ptr, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  store i32 %2, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #6
  store i32 0, ptr %7, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #6
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #6
  %10 = load ptr, ptr %5, align 8, !tbaa !5
  %11 = call noalias ptr @strdup(ptr noundef %10) #6
  store ptr %11, ptr %9, align 8, !tbaa !5
  %12 = icmp eq ptr %11, null
  br i1 %12, label %13, label %16

13:                                               ; preds = %3
  %14 = load ptr, ptr @stderr, align 8, !tbaa !5
  %15 = call i32 @fputs(ptr noundef @.str.13, ptr noundef %14)
  call void @exit(i32 noundef 1) #7
  unreachable

16:                                               ; preds = %3
  %17 = load ptr, ptr %9, align 8, !tbaa !5
  %18 = call ptr @strtok(ptr noundef %17, ptr noundef @.str.14) #6
  store ptr %18, ptr %8, align 8, !tbaa !5
  br label %19

19:                                               ; preds = %30, %16
  %20 = load ptr, ptr %8, align 8, !tbaa !5
  %21 = icmp ne ptr %20, null
  br i1 %21, label %22, label %32

22:                                               ; preds = %19
  %23 = load ptr, ptr %4, align 8, !tbaa !5
  %24 = load ptr, ptr %8, align 8, !tbaa !5
  %25 = load ptr, ptr %8, align 8, !tbaa !5
  %26 = call i64 @strlen(ptr noundef %25) #8
  %27 = call i32 @strncmp(ptr noundef %23, ptr noundef %24, i64 noundef %26) #8
  %28 = icmp eq i32 %27, 0
  br i1 %28, label %29, label %30

29:                                               ; preds = %22
  store i32 1, ptr %7, align 4, !tbaa !9
  br label %32

30:                                               ; preds = %22
  %31 = call ptr @strtok(ptr noundef null, ptr noundef @.str.14) #6
  store ptr %31, ptr %8, align 8, !tbaa !5
  br label %19, !llvm.loop !11

32:                                               ; preds = %29, %19
  %33 = load ptr, ptr %9, align 8, !tbaa !5
  call void @free(ptr noundef %33) #6
  %34 = load i32, ptr %6, align 4, !tbaa !9
  %35 = icmp ne i32 %34, 0
  br i1 %35, label %36, label %41

36:                                               ; preds = %32
  %37 = load i32, ptr %7, align 4, !tbaa !9
  %38 = icmp ne i32 %37, 0
  %39 = xor i1 %38, true
  %40 = zext i1 %39 to i32
  br label %43

41:                                               ; preds = %32
  %42 = load i32, ptr %7, align 4, !tbaa !9
  br label %43

43:                                               ; preds = %41, %36
  %44 = phi i32 [ %40, %36 ], [ %42, %41 ]
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #6
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #6
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #6
  ret i32 %44
}

; Function Attrs: noreturn nounwind
declare void @exit(i32 noundef) #5

; Function Attrs: nounwind
declare ptr @strtok(ptr noundef, ptr noundef) #2

; Function Attrs: nounwind willreturn memory(read)
declare i32 @strncmp(ptr noundef, ptr noundef, i64 noundef) #1

; Function Attrs: nounwind
declare void @free(ptr noundef) #2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nounwind willreturn memory(read) "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 = { "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 #4 = { 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 #5 = { noreturn 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 #6 = { nounwind }
attributes #7 = { noreturn nounwind }
attributes #8 = { nounwind willreturn memory(read) }

!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}
!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"

@stderr = external local_unnamed_addr global ptr, align 8
@.str.13 = external hidden unnamed_addr constant [25 x i8], align 1
@.str.14 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: mustprogress nofree nounwind willreturn memory(argmem: read)
declare i64 @strlen(ptr nocapture noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nofree nounwind willreturn memory(argmem: readwrite, inaccessiblemem: readwrite)
declare noalias ptr @strdup(ptr nocapture noundef readonly) local_unnamed_addr #1

; Function Attrs: nofree nounwind
declare noundef i32 @fputs(ptr nocapture noundef readonly, ptr nocapture noundef) local_unnamed_addr #2

; Function Attrs: nounwind uwtable
define dso_local range(i32 0, 2) i32 @fsfilter(ptr nocapture noundef readonly %0, ptr nocapture noundef readonly %1, i32 noundef %2) local_unnamed_addr #3 {
  %4 = tail call noalias ptr @strdup(ptr noundef %1) #7
  %5 = icmp eq ptr %4, null
  br i1 %5, label %6, label %9

6:                                                ; preds = %3
  %7 = load ptr, ptr @stderr, align 8, !tbaa !5
  %8 = tail call i32 @fputs(ptr noundef nonnull @.str.13, ptr noundef %7) #8
  tail call void @exit(i32 noundef 1) #9
  unreachable

9:                                                ; preds = %3
  %10 = tail call ptr @strtok(ptr noundef nonnull %4, ptr noundef nonnull @.str.14) #7
  %.not13 = icmp eq ptr %10, null
  br i1 %.not13, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %9, %14
  %.0914 = phi ptr [ %15, %14 ], [ %10, %9 ]
  %11 = tail call i64 @strlen(ptr noundef nonnull dereferenceable(1) %.0914) #10
  %12 = tail call i32 @strncmp(ptr noundef %0, ptr noundef nonnull %.0914, i64 noundef %11) #10
  %13 = icmp ne i32 %12, 0
  br i1 %13, label %14, label %._crit_edge.loopexit

14:                                               ; preds = %.lr.ph
  %15 = tail call ptr @strtok(ptr noundef null, ptr noundef nonnull @.str.14) #7
  %.not = icmp eq ptr %15, null
  br i1 %.not, label %._crit_edge.loopexit, label %.lr.ph, !llvm.loop !9

._crit_edge.loopexit:                             ; preds = %.lr.ph, %14
  %.0.ph = phi i32 [ 0, %14 ], [ 1, %.lr.ph ]
  %16 = zext i1 %13 to i32
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %9
  %.not.lcssa = phi i32 [ 1, %9 ], [ %16, %._crit_edge.loopexit ]
  %.0 = phi i32 [ 0, %9 ], [ %.0.ph, %._crit_edge.loopexit ]
  tail call void @free(ptr noundef %4) #7
  %.not11 = icmp eq i32 %2, 0
  %17 = select i1 %.not11, i32 %.0, i32 %.not.lcssa
  ret i32 %17
}

; Function Attrs: noreturn nounwind
declare void @exit(i32 noundef) local_unnamed_addr #4

; Function Attrs: mustprogress nofree nounwind willreturn
declare ptr @strtok(ptr noundef, ptr nocapture noundef readonly) local_unnamed_addr #5

; Function Attrs: mustprogress nofree nounwind willreturn memory(argmem: read)
declare i32 @strncmp(ptr nocapture noundef, ptr nocapture noundef, i64 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite)
declare void @free(ptr allocptr nocapture noundef) local_unnamed_addr #6

attributes #0 = { mustprogress nofree nounwind willreturn memory(argmem: read) "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 nofree nounwind willreturn memory(argmem: readwrite, inaccessiblemem: readwrite) "alloc-family"="malloc" "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 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 #4 = { noreturn 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 #5 = { mustprogress nofree nounwind willreturn "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 #6 = { mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite) "alloc-family"="malloc" "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 #7 = { nounwind }
attributes #8 = { cold }
attributes #9 = { noreturn nounwind }
attributes #10 = { nounwind willreturn memory(read) }

!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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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