; LLVM IR from ybubnov/libhuffman :: src (symbol)

; 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.__huf_symbol_mapping = type { i64, ptr }

; 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 i32 @huf_symbol_mapping_element_free(ptr noundef) #1

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

12:                                               ; preds = %3
  %13 = load ptr, ptr %5, align 8, !tbaa !5
  %14 = icmp eq ptr %13, null
  br i1 %14, label %15, label %16

15:                                               ; preds = %12
  store i32 2, ptr %8, align 4, !tbaa !11
  br label %66

16:                                               ; preds = %12
  br label %17

17:                                               ; preds = %16
  br label %18

18:                                               ; preds = %17
  br label %19

19:                                               ; preds = %18
  %20 = load ptr, ptr %7, align 8, !tbaa !5
  %21 = icmp eq ptr %20, null
  br i1 %21, label %22, label %23

22:                                               ; preds = %19
  store i32 2, ptr %8, align 4, !tbaa !11
  br label %66

23:                                               ; preds = %19
  br label %24

24:                                               ; preds = %23
  br label %25

25:                                               ; preds = %24
  br label %26

26:                                               ; preds = %25
  %27 = load i64, ptr %6, align 8, !tbaa !9
  %28 = icmp ult i64 %27, 0
  br i1 %28, label %36, label %29

29:                                               ; preds = %26
  %30 = load i64, ptr %6, align 8, !tbaa !9
  %31 = load ptr, ptr %5, align 8, !tbaa !5
  %32 = getelementptr inbounds %struct.__huf_symbol_mapping, ptr %31, i32 0, i32 0
  %33 = load i64, ptr %32, align 8, !tbaa !13
  %34 = sub i64 %33, 1
  %35 = icmp ugt i64 %30, %34
  br i1 %35, label %36, label %37

36:                                               ; preds = %29, %26
  store i32 2, ptr %8, align 4, !tbaa !11
  br label %66

37:                                               ; preds = %29
  br label %38

38:                                               ; preds = %37
  br label %39

39:                                               ; preds = %38
  %40 = load ptr, ptr %5, align 8, !tbaa !5
  %41 = getelementptr inbounds %struct.__huf_symbol_mapping, ptr %40, i32 0, i32 1
  %42 = load ptr, ptr %41, align 8, !tbaa !15
  %43 = load i64, ptr %6, align 8, !tbaa !9
  %44 = getelementptr inbounds ptr, ptr %42, i64 %43
  %45 = load ptr, ptr %44, align 8, !tbaa !5
  store ptr %45, ptr %10, align 8, !tbaa !5
  %46 = load ptr, ptr %10, align 8, !tbaa !5
  %47 = icmp ne ptr %46, null
  br i1 %47, label %48, label %58

48:                                               ; preds = %39
  %49 = call i32 @huf_symbol_mapping_element_free(ptr noundef %10)
  store i32 %49, ptr %9, align 4, !tbaa !11
  %50 = load i32, ptr %9, align 4, !tbaa !11
  %51 = icmp ne i32 %50, 0
  br i1 %51, label %52, label %57

52:                                               ; preds = %48
  br label %53

53:                                               ; preds = %52
  %54 = load i32, ptr %9, align 4, !tbaa !11
  store i32 %54, ptr %8, align 4, !tbaa !11
  br label %66

55:                                               ; No predecessors!
  br label %56

56:                                               ; preds = %55
  br label %57

57:                                               ; preds = %56, %48
  br label %58

58:                                               ; preds = %57, %39
  %59 = load ptr, ptr %7, align 8, !tbaa !5
  %60 = load ptr, ptr %5, align 8, !tbaa !5
  %61 = getelementptr inbounds %struct.__huf_symbol_mapping, ptr %60, i32 0, i32 1
  %62 = load ptr, ptr %61, align 8, !tbaa !15
  %63 = load i64, ptr %6, align 8, !tbaa !9
  %64 = getelementptr inbounds ptr, ptr %62, i64 %63
  store ptr %59, ptr %64, align 8, !tbaa !5
  br label %65

65:                                               ; preds = %58
  br label %66

66:                                               ; preds = %65, %53, %36, %22, %15
  %67 = load i32, ptr %8, align 4, !tbaa !11
  store i32 %67, ptr %4, align 4
  store i32 1, ptr %11, align 4
  br label %70

68:                                               ; No predecessors!
  br label %69

69:                                               ; preds = %68
  store i32 0, ptr %11, align 4
  br label %70

70:                                               ; preds = %69, %66
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  %71 = load i32, ptr %11, align 4
  switch i32 %71, label %74 [
    i32 0, label %72
    i32 1, label %72
  ]

72:                                               ; preds = %70, %70
  %73 = load i32, ptr %4, align 4
  ret i32 %73

74:                                               ; preds = %70
  unreachable
}

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 = { 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, !12, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = !{!14, !10, i64 0}
!14 = !{!"__huf_symbol_mapping", !10, i64 0, !6, i64 8}
!15 = !{!14, !6, i64 8}


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

; 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 @huf_symbol_mapping_element_free(ptr noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local i32 @huf_symbol_mapping_insert(ptr noundef readonly %0, i64 noundef %1, ptr noundef %2) local_unnamed_addr #1 {
  %4 = alloca ptr, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #2
  %5 = icmp eq ptr %0, null
  %6 = icmp eq ptr %2, null
  %or.cond = or i1 %5, %6
  br i1 %or.cond, label %21, label %7

7:                                                ; preds = %3
  %8 = load i64, ptr %0, align 8, !tbaa !5
  %9 = add i64 %8, -1
  %10 = icmp ult i64 %9, %1
  br i1 %10, label %21, label %11

11:                                               ; preds = %7
  %12 = getelementptr inbounds i8, ptr %0, i64 8
  %13 = load ptr, ptr %12, align 8, !tbaa !11
  %14 = getelementptr inbounds ptr, ptr %13, i64 %1
  %15 = load ptr, ptr %14, align 8, !tbaa !12
  store ptr %15, ptr %4, align 8, !tbaa !12
  %.not = icmp eq ptr %15, null
  br i1 %.not, label %18, label %16

16:                                               ; preds = %11
  %17 = call i32 @huf_symbol_mapping_element_free(ptr noundef nonnull %4)
  %.not17 = icmp eq i32 %17, 0
  br i1 %.not17, label %._crit_edge, label %21

._crit_edge:                                      ; preds = %16
  %.pre = load ptr, ptr %12, align 8, !tbaa !11
  br label %18

18:                                               ; preds = %._crit_edge, %11
  %19 = phi ptr [ %.pre, %._crit_edge ], [ %13, %11 ]
  %20 = getelementptr inbounds ptr, ptr %19, i64 %1
  store ptr %2, ptr %20, align 8, !tbaa !12
  br label %21

21:                                               ; preds = %16, %7, %3, %18
  %.0 = phi i32 [ 0, %18 ], [ 2, %3 ], [ 2, %7 ], [ %17, %16 ]
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #2
  ret i32 %.0
}

attributes #0 = { mustprogress 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 = { 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, !7, i64 0}
!6 = !{!"__huf_symbol_mapping", !7, i64 0, !10, i64 8}
!7 = !{!"long", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !10, i64 8}
!12 = !{!10, !10, i64 0}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass