; LLVM IR from NOAA-PMEL/Ferret :: fer/ccr (list)

; 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: 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
declare dso_local ptr @list_mvfront(ptr noundef) #1

; Function Attrs: nounwind uwtable
declare dso_local i32 @list_empty(ptr noundef) #1

; Function Attrs: nounwind uwtable
declare dso_local ptr @list_remove_front(ptr noundef, ptr noundef, i32 noundef) #1

declare void @FerMem_Free(ptr noundef, ptr noundef, i32 noundef) #2

; Function Attrs: nounwind uwtable
define dso_local void @list_free(ptr noundef %0, ptr noundef %1, ptr noundef %2, i32 noundef %3) #1 {
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca i32, align 4
  %9 = alloca ptr, align 8
  store ptr %0, ptr %5, align 8, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !5
  store ptr %2, ptr %7, align 8, !tbaa !5
  store i32 %3, ptr %8, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #3
  %10 = load ptr, ptr %5, align 8, !tbaa !5
  %11 = call ptr @list_mvfront(ptr noundef %10)
  br label %12

12:                                               ; preds = %35, %4
  %13 = load ptr, ptr %5, align 8, !tbaa !5
  %14 = call i32 @list_empty(ptr noundef %13)
  %15 = icmp ne i32 %14, 0
  %16 = xor i1 %15, true
  br i1 %16, label %17, label %36

17:                                               ; preds = %12
  %18 = load ptr, ptr %5, align 8, !tbaa !5
  %19 = load ptr, ptr %7, align 8, !tbaa !5
  %20 = load i32, ptr %8, align 4, !tbaa !9
  %21 = call ptr @list_remove_front(ptr noundef %18, ptr noundef %19, i32 noundef %20)
  store ptr %21, ptr %9, align 8, !tbaa !5
  %22 = load ptr, ptr %6, align 8, !tbaa !5
  %23 = icmp ne ptr %22, inttoptr (i64 -2 to ptr)
  br i1 %23, label %24, label %35

24:                                               ; preds = %17
  %25 = load ptr, ptr %6, align 8, !tbaa !5
  %26 = icmp eq ptr %25, inttoptr (i64 -1 to ptr)
  br i1 %26, label %27, label %31

27:                                               ; preds = %24
  %28 = load ptr, ptr %9, align 8, !tbaa !5
  %29 = load ptr, ptr %7, align 8, !tbaa !5
  %30 = load i32, ptr %8, align 4, !tbaa !9
  call void @FerMem_Free(ptr noundef %28, ptr noundef %29, i32 noundef %30)
  br label %34

31:                                               ; preds = %24
  %32 = load ptr, ptr %6, align 8, !tbaa !5
  %33 = load ptr, ptr %9, align 8, !tbaa !5
  call void %32(ptr noundef %33)
  br label %34

34:                                               ; preds = %31, %27
  br label %35

35:                                               ; preds = %34, %17
  br label %12, !llvm.loop !11

36:                                               ; preds = %12
  %37 = load ptr, ptr %5, align 8, !tbaa !5
  %38 = load ptr, ptr %7, align 8, !tbaa !5
  %39 = load i32, ptr %8, align 4, !tbaa !9
  call void @FerMem_Free(ptr noundef %37, ptr noundef %38, i32 noundef %39)
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #3
  ret void
}

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 = !{!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"

; Function Attrs: nounwind uwtable
declare dso_local ptr @list_mvfront(ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local i32 @list_empty(ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local ptr @list_remove_front(ptr noundef, ptr noundef, i32 noundef) local_unnamed_addr #0

declare void @FerMem_Free(ptr noundef, ptr noundef, i32 noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local void @list_free(ptr noundef %0, ptr noundef %1, ptr noundef %2, i32 noundef %3) local_unnamed_addr #0 {
  %5 = tail call ptr @list_mvfront(ptr noundef %0)
  %6 = tail call i32 @list_empty(ptr noundef %0)
  %.not15 = icmp eq i32 %6, 0
  br i1 %.not15, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %4
  %magicptr = ptrtoint ptr %1 to i64
  switch i64 %magicptr, label %.lr.ph.split [
    i64 -2, label %.lr.ph.split.us
    i64 -1, label %.lr.ph.split.us16
  ]

.lr.ph.split.us:                                  ; preds = %.lr.ph, %.lr.ph.split.us
  %7 = tail call ptr @list_remove_front(ptr noundef %0, ptr noundef %2, i32 noundef %3)
  %8 = tail call i32 @list_empty(ptr noundef %0)
  %.not.us = icmp eq i32 %8, 0
  br i1 %.not.us, label %.lr.ph.split.us, label %._crit_edge, !llvm.loop !5

.lr.ph.split.us16:                                ; preds = %.lr.ph, %.lr.ph.split.us16
  %9 = tail call ptr @list_remove_front(ptr noundef %0, ptr noundef %2, i32 noundef %3)
  tail call void @FerMem_Free(ptr noundef %9, ptr noundef %2, i32 noundef %3) #2
  %10 = tail call i32 @list_empty(ptr noundef %0)
  %.not.us17 = icmp eq i32 %10, 0
  br i1 %.not.us17, label %.lr.ph.split.us16, label %._crit_edge, !llvm.loop !5

.lr.ph.split:                                     ; preds = %.lr.ph, %.lr.ph.split
  %11 = tail call ptr @list_remove_front(ptr noundef %0, ptr noundef %2, i32 noundef %3)
  tail call void %1(ptr noundef %11) #2
  %12 = tail call i32 @list_empty(ptr noundef %0)
  %.not = icmp eq i32 %12, 0
  br i1 %.not, label %.lr.ph.split, label %._crit_edge, !llvm.loop !5

._crit_edge:                                      ; preds = %.lr.ph.split.us16, %.lr.ph.split.us, %.lr.ph.split, %4
  tail call void @FerMem_Free(ptr noundef %0, ptr noundef %2, i32 noundef %3) #2
  ret void
}

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 = { 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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyCFGPass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass