; LLVM IR from mncoppola/rpef :: utilities_src/squashfs4.1/squashfs-tools (sort)

; 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.17 = external hidden unnamed_addr constant [2 x i8], align 1
@.str.18 = external hidden unnamed_addr constant [33 x i8], align 1
@.str.19 = external hidden unnamed_addr constant [6 x i8], align 1
@.str.20 = external hidden unnamed_addr constant [71 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
declare i32 @fprintf(ptr noundef, 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 uwtable
declare dso_local i32 @add_sort_list(ptr noundef, i32 noundef, i32 noundef, ptr noundef) #2

; Function Attrs: nounwind uwtable
define dso_local i32 @read_sort_file(ptr noundef %0, i32 noundef %1, ptr noundef %2) #2 {
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca [16385 x i8], align 16
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  %12 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !9
  store ptr %2, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #4
  call void @llvm.lifetime.start.p0(i64 16385, ptr %9) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #4
  %13 = load ptr, ptr %5, align 8, !tbaa !5
  %14 = call noalias ptr @fopen(ptr noundef %13, ptr noundef @.str.17)
  store ptr %14, ptr %8, align 8, !tbaa !5
  %15 = icmp eq ptr %14, null
  br i1 %15, label %16, label %17

16:                                               ; preds = %3
  call void @perror(ptr noundef @.str.18)
  store i32 0, ptr %4, align 4
  store i32 1, ptr %12, align 4
  br label %51

17:                                               ; preds = %3
  br label %18

18:                                               ; preds = %47, %17
  %19 = load ptr, ptr %8, align 8, !tbaa !5
  %20 = getelementptr inbounds [16385 x i8], ptr %9, i64 0, i64 0
  %21 = call i32 (ptr, ptr, ...) @__isoc99_fscanf(ptr noundef %19, ptr noundef @.str.19, ptr noundef %20, ptr noundef %11)
  %22 = icmp ne i32 %21, -1
  br i1 %22, label %23, label %48

23:                                               ; preds = %18
  %24 = load i32, ptr %11, align 4, !tbaa !9
  %25 = icmp sge i32 %24, -32768
  br i1 %25, label %26, label %39

26:                                               ; preds = %23
  %27 = load i32, ptr %11, align 4, !tbaa !9
  %28 = icmp sle i32 %27, 32767
  br i1 %28, label %29, label %39

29:                                               ; preds = %26
  %30 = getelementptr inbounds [16385 x i8], ptr %9, i64 0, i64 0
  %31 = load i32, ptr %11, align 4, !tbaa !9
  %32 = load i32, ptr %6, align 4, !tbaa !9
  %33 = load ptr, ptr %7, align 8, !tbaa !5
  %34 = call i32 @add_sort_list(ptr noundef %30, i32 noundef %31, i32 noundef %32, ptr noundef %33)
  store i32 %34, ptr %10, align 4, !tbaa !9
  %35 = load i32, ptr %10, align 4, !tbaa !9
  %36 = icmp eq i32 %35, 0
  br i1 %36, label %37, label %38

37:                                               ; preds = %29
  store i32 0, ptr %4, align 4
  store i32 1, ptr %12, align 4
  br label %51

38:                                               ; preds = %29
  br label %47

39:                                               ; preds = %26, %23
  br label %40

40:                                               ; preds = %39
  %41 = load ptr, ptr @stderr, align 8, !tbaa !5
  %42 = getelementptr inbounds [16385 x i8], ptr %9, i64 0, i64 0
  %43 = load i32, ptr %11, align 4, !tbaa !9
  %44 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %41, ptr noundef @.str.20, ptr noundef %42, i32 noundef %43) #4
  br label %45

45:                                               ; preds = %40
  br label %46

46:                                               ; preds = %45
  br label %47

47:                                               ; preds = %46, %38
  br label %18, !llvm.loop !11

48:                                               ; preds = %18
  %49 = load ptr, ptr %8, align 8, !tbaa !5
  %50 = call i32 @fclose(ptr noundef %49)
  store i32 1, ptr %4, align 4
  store i32 1, ptr %12, align 4
  br label %51

51:                                               ; preds = %48, %37, %16
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #4
  call void @llvm.lifetime.end.p0(i64 16385, ptr %9) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #4
  %52 = load i32, ptr %4, align 4
  ret i32 %52
}

declare noalias ptr @fopen(ptr noundef, ptr noundef) #3

declare void @perror(ptr noundef) #3

declare i32 @__isoc99_fscanf(ptr noundef, ptr noundef, ...) #3

declare i32 @fclose(ptr noundef) #3

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 = { "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 }

!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.17 = external hidden unnamed_addr constant [2 x i8], align 1
@.str.18 = external hidden unnamed_addr constant [33 x i8], align 1
@.str.19 = external hidden unnamed_addr constant [6 x i8], align 1
@.str.20 = external hidden unnamed_addr constant [71 x i8], align 1

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

; Function Attrs: nofree nounwind
declare noundef i32 @fprintf(ptr nocapture noundef, ptr nocapture noundef readonly, ...) local_unnamed_addr #1

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

; Function Attrs: nounwind uwtable
declare dso_local i32 @add_sort_list(ptr noundef, i32 noundef, i32 noundef, ptr noundef) local_unnamed_addr #2

; Function Attrs: nounwind uwtable
define dso_local range(i32 0, 2) i32 @read_sort_file(ptr nocapture noundef readonly %0, i32 noundef %1, ptr noundef %2) local_unnamed_addr #2 {
  %4 = alloca [16385 x i8], align 16
  %5 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 16385, ptr nonnull %4) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %5) #4
  %6 = tail call noalias ptr @fopen(ptr noundef %0, ptr noundef nonnull @.str.17)
  %7 = icmp eq ptr %6, null
  br i1 %7, label %9, label %.preheader

.preheader:                                       ; preds = %3
  %8 = call i32 (ptr, ptr, ...) @__isoc99_fscanf(ptr noundef nonnull %6, ptr noundef nonnull @.str.19, ptr noundef nonnull %4, ptr noundef nonnull %5) #4
  %.not8 = icmp eq i32 %8, -1
  br i1 %.not8, label %._crit_edge, label %.lr.ph

9:                                                ; preds = %3
  tail call void @perror(ptr noundef nonnull @.str.18) #5
  br label %.loopexit

.lr.ph:                                           ; preds = %.preheader, %18
  %10 = load i32, ptr %5, align 4
  %11 = add i32 %10, 32768
  %or.cond = icmp ult i32 %11, 65536
  br i1 %or.cond, label %12, label %15

12:                                               ; preds = %.lr.ph
  %13 = call i32 @add_sort_list(ptr noundef nonnull %4, i32 noundef %10, i32 noundef %1, ptr noundef %2)
  %14 = icmp eq i32 %13, 0
  br i1 %14, label %.loopexit, label %18

15:                                               ; preds = %.lr.ph
  %16 = load ptr, ptr @stderr, align 8, !tbaa !5
  %17 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %16, ptr noundef nonnull @.str.20, ptr noundef nonnull %4, i32 noundef %10) #6
  br label %18

18:                                               ; preds = %12, %15
  %19 = call i32 (ptr, ptr, ...) @__isoc99_fscanf(ptr noundef nonnull %6, ptr noundef nonnull @.str.19, ptr noundef nonnull %4, ptr noundef nonnull %5) #4
  %.not = icmp eq i32 %19, -1
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %18, %.preheader
  %20 = call i32 @fclose(ptr noundef nonnull %6)
  br label %.loopexit

.loopexit:                                        ; preds = %12, %._crit_edge, %9
  %.0 = phi i32 [ 0, %9 ], [ 1, %._crit_edge ], [ 0, %12 ]
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %5) #4
  call void @llvm.lifetime.end.p0(i64 16385, ptr nonnull %4) #4
  ret i32 %.0
}

; Function Attrs: nofree nounwind
declare noalias noundef ptr @fopen(ptr nocapture noundef readonly, ptr nocapture noundef readonly) local_unnamed_addr #1

; Function Attrs: nofree nounwind
declare void @perror(ptr nocapture noundef readonly) local_unnamed_addr #1

declare i32 @__isoc99_fscanf(ptr noundef, ptr noundef, ...) local_unnamed_addr #3

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

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 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 = { "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 }
attributes #5 = { cold }
attributes #6 = { cold 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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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