; LLVM IR from PaulBatchelor/sndkit :: lil (lil)

; 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"

%struct._lil_list_t = type { ptr, i64, i64 }

; 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 void @free(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 void @lil_free_value(ptr noundef) #2

; Function Attrs: nounwind uwtable
define dso_local void @lil_free_list(ptr noundef %0) #2 {
  %2 = alloca ptr, align 8
  %3 = alloca i64, align 8
  %4 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  %5 = load ptr, ptr %2, align 8, !tbaa !5
  %6 = icmp ne ptr %5, null
  br i1 %6, label %8, label %7

7:                                                ; preds = %1
  store i32 1, ptr %4, align 4
  br label %30

8:                                                ; preds = %1
  store i64 0, ptr %3, align 8, !tbaa !9
  br label %9

9:                                                ; preds = %22, %8
  %10 = load i64, ptr %3, align 8, !tbaa !9
  %11 = load ptr, ptr %2, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct._lil_list_t, ptr %11, i32 0, i32 1
  %13 = load i64, ptr %12, align 8, !tbaa !11
  %14 = icmp ult i64 %10, %13
  br i1 %14, label %15, label %25

15:                                               ; preds = %9
  %16 = load ptr, ptr %2, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct._lil_list_t, ptr %16, i32 0, i32 0
  %18 = load ptr, ptr %17, align 8, !tbaa !13
  %19 = load i64, ptr %3, align 8, !tbaa !9
  %20 = getelementptr inbounds ptr, ptr %18, i64 %19
  %21 = load ptr, ptr %20, align 8, !tbaa !5
  call void @lil_free_value(ptr noundef %21)
  br label %22

22:                                               ; preds = %15
  %23 = load i64, ptr %3, align 8, !tbaa !9
  %24 = add i64 %23, 1
  store i64 %24, ptr %3, align 8, !tbaa !9
  br label %9, !llvm.loop !14

25:                                               ; preds = %9
  %26 = load ptr, ptr %2, align 8, !tbaa !5
  %27 = getelementptr inbounds %struct._lil_list_t, ptr %26, i32 0, i32 0
  %28 = load ptr, ptr %27, align 8, !tbaa !13
  call void @free(ptr noundef %28) #3
  %29 = load ptr, ptr %2, align 8, !tbaa !5
  call void @free(ptr noundef %29) #3
  store i32 0, ptr %4, align 4
  br label %30

30:                                               ; preds = %25, %7
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  %31 = load i32, ptr %4, align 4
  switch i32 %31, label %33 [
    i32 0, label %32
    i32 1, label %32
  ]

32:                                               ; preds = %30, %30
  ret void

33:                                               ; preds = %30
  unreachable
}

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 = { 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 = !{!"long", !7, i64 0}
!11 = !{!12, !10, i64 8}
!12 = !{!"_lil_list_t", !6, i64 0, !10, i64 8, !10, i64 16}
!13 = !{!12, !6, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"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: mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite)
declare void @free(ptr allocptr nocapture noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local void @lil_free_value(ptr noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local void @lil_free_list(ptr noundef %0) local_unnamed_addr #1 {
  %.not = icmp eq ptr %0, null
  br i1 %.not, label %11, label %.preheader

.preheader:                                       ; preds = %1
  %2 = getelementptr inbounds i8, ptr %0, i64 8
  %3 = load i64, ptr %2, align 8, !tbaa !5
  %.not9 = icmp eq i64 %3, 0
  br i1 %.not9, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %.preheader, %.lr.ph
  %.08 = phi i64 [ %7, %.lr.ph ], [ 0, %.preheader ]
  %4 = load ptr, ptr %0, align 8, !tbaa !11
  %5 = getelementptr inbounds ptr, ptr %4, i64 %.08
  %6 = load ptr, ptr %5, align 8, !tbaa !12
  tail call void @lil_free_value(ptr noundef %6)
  %7 = add nuw i64 %.08, 1
  %8 = load i64, ptr %2, align 8, !tbaa !5
  %9 = icmp ult i64 %7, %8
  br i1 %9, label %.lr.ph, label %._crit_edge, !llvm.loop !13

._crit_edge:                                      ; preds = %.lr.ph, %.preheader
  %10 = load ptr, ptr %0, align 8, !tbaa !11
  tail call void @free(ptr noundef %10) #2
  tail call void @free(ptr noundef nonnull %0) #2
  br label %11

11:                                               ; preds = %1, %._crit_edge
  ret void
}

attributes #0 = { 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 #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 = { 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, !10, i64 8}
!6 = !{!"_lil_list_t", !7, i64 0, !10, i64 8, !10, i64 16}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"long", !8, i64 0}
!11 = !{!6, !7, i64 0}
!12 = !{!7, !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


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