; LLVM IR from mncoppola/rpef :: utilities_src/squashfs2.1/squashfs-2.1-r2 (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.12 = external hidden unnamed_addr constant [2 x i8], align 1
@.str.13 = external hidden unnamed_addr constant [33 x i8], align 1
@.str.14 = external hidden unnamed_addr constant [6 x i8], align 1
@.str.15 = 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

declare void @perror(ptr noundef) #3

; 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
  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
  %12 = load ptr, ptr %5, align 8, !tbaa !5
  %13 = call noalias ptr @fopen(ptr noundef %12, ptr noundef @.str.12)
  store ptr %13, ptr %8, align 8, !tbaa !5
  %14 = icmp eq ptr %13, null
  br i1 %14, label %15, label %16

15:                                               ; preds = %3
  call void @perror(ptr noundef @.str.13)
  store i32 0, ptr %4, align 4
  store i32 1, ptr %11, align 4
  br label %43

16:                                               ; preds = %3
  br label %17

17:                                               ; preds = %39, %16
  %18 = load ptr, ptr %8, align 8, !tbaa !5
  %19 = getelementptr inbounds [16385 x i8], ptr %9, i64 0, i64 0
  %20 = call i32 (ptr, ptr, ...) @__isoc99_fscanf(ptr noundef %18, ptr noundef @.str.14, ptr noundef %19, ptr noundef %10)
  %21 = icmp ne i32 %20, -1
  br i1 %21, label %22, label %40

22:                                               ; preds = %17
  %23 = load i32, ptr %10, align 4, !tbaa !9
  %24 = icmp sge i32 %23, -32768
  br i1 %24, label %25, label %34

25:                                               ; preds = %22
  %26 = load i32, ptr %10, align 4, !tbaa !9
  %27 = icmp sle i32 %26, 32767
  br i1 %27, label %28, label %34

28:                                               ; preds = %25
  %29 = getelementptr inbounds [16385 x i8], ptr %9, i64 0, i64 0
  %30 = load i32, ptr %10, align 4, !tbaa !9
  %31 = load i32, ptr %6, align 4, !tbaa !9
  %32 = load ptr, ptr %7, align 8, !tbaa !5
  %33 = call i32 @add_sort_list(ptr noundef %29, i32 noundef %30, i32 noundef %31, ptr noundef %32)
  br label %39

34:                                               ; preds = %25, %22
  %35 = load ptr, ptr @stderr, align 8, !tbaa !5
  %36 = getelementptr inbounds [16385 x i8], ptr %9, i64 0, i64 0
  %37 = load i32, ptr %10, align 4, !tbaa !9
  %38 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %35, ptr noundef @.str.15, ptr noundef %36, i32 noundef %37) #4
  br label %39

39:                                               ; preds = %34, %28
  br label %17, !llvm.loop !11

40:                                               ; preds = %17
  %41 = load ptr, ptr %8, align 8, !tbaa !5
  %42 = call i32 @fclose(ptr noundef %41)
  store i32 1, ptr %4, align 4
  store i32 1, ptr %11, align 4
  br label %43

43:                                               ; preds = %40, %15
  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
  %44 = load i32, ptr %4, align 4
  ret i32 %44
}

declare noalias ptr @fopen(ptr noundef, 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.12 = external hidden unnamed_addr constant [2 x i8], align 1
@.str.13 = external hidden unnamed_addr constant [33 x i8], align 1
@.str.14 = external hidden unnamed_addr constant [6 x i8], align 1
@.str.15 = 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: nofree nounwind
declare void @perror(ptr nocapture noundef readonly) local_unnamed_addr #1

; 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.12)
  %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.14, ptr noundef nonnull %4, ptr noundef nonnull %5) #4
  %.not7 = icmp eq i32 %8, -1
  br i1 %.not7, label %._crit_edge, label %.lr.ph

9:                                                ; preds = %3
  tail call void @perror(ptr noundef nonnull @.str.13) #5
  br label %20

.lr.ph:                                           ; preds = %.preheader, %17
  %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 %14

12:                                               ; preds = %.lr.ph
  %13 = call i32 @add_sort_list(ptr noundef nonnull %4, i32 noundef %10, i32 noundef %1, ptr noundef %2)
  br label %17

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

17:                                               ; preds = %14, %12
  %18 = call i32 (ptr, ptr, ...) @__isoc99_fscanf(ptr noundef nonnull %6, ptr noundef nonnull @.str.14, ptr noundef nonnull %4, ptr noundef nonnull %5) #4
  %.not = icmp eq i32 %18, -1
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %17, %.preheader
  %19 = call i32 @fclose(ptr noundef nonnull %6)
  br label %20

20:                                               ; preds = %._crit_edge, %9
  %.0 = phi i32 [ 0, %9 ], [ 1, %._crit_edge ]
  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

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