; 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
define dso_local i32 @huf_symbol_mapping_get(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
  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
  br label %10

10:                                               ; preds = %3
  %11 = load ptr, ptr %5, align 8, !tbaa !5
  %12 = icmp eq ptr %11, null
  br i1 %12, label %13, label %14

13:                                               ; preds = %10
  store i32 2, ptr %8, align 4, !tbaa !11
  br label %46

14:                                               ; preds = %10
  br label %15

15:                                               ; preds = %14
  br label %16

16:                                               ; preds = %15
  br label %17

17:                                               ; preds = %16
  %18 = load ptr, ptr %7, align 8, !tbaa !5
  %19 = icmp eq ptr %18, null
  br i1 %19, label %20, label %21

20:                                               ; preds = %17
  store i32 2, ptr %8, align 4, !tbaa !11
  br label %46

21:                                               ; preds = %17
  br label %22

22:                                               ; preds = %21
  br label %23

23:                                               ; preds = %22
  br label %24

24:                                               ; preds = %23
  %25 = load i64, ptr %6, align 8, !tbaa !9
  %26 = icmp ult i64 %25, 0
  br i1 %26, label %34, label %27

27:                                               ; preds = %24
  %28 = load i64, ptr %6, align 8, !tbaa !9
  %29 = load ptr, ptr %5, align 8, !tbaa !5
  %30 = getelementptr inbounds %struct.__huf_symbol_mapping, ptr %29, i32 0, i32 0
  %31 = load i64, ptr %30, align 8, !tbaa !13
  %32 = sub i64 %31, 1
  %33 = icmp ugt i64 %28, %32
  br i1 %33, label %34, label %35

34:                                               ; preds = %27, %24
  store i32 2, ptr %8, align 4, !tbaa !11
  br label %46

35:                                               ; preds = %27
  br label %36

36:                                               ; preds = %35
  br label %37

37:                                               ; preds = %36
  %38 = load ptr, ptr %5, align 8, !tbaa !5
  %39 = getelementptr inbounds %struct.__huf_symbol_mapping, ptr %38, i32 0, i32 1
  %40 = load ptr, ptr %39, align 8, !tbaa !15
  %41 = load i64, ptr %6, align 8, !tbaa !9
  %42 = getelementptr inbounds ptr, ptr %40, i64 %41
  %43 = load ptr, ptr %42, align 8, !tbaa !5
  %44 = load ptr, ptr %7, align 8, !tbaa !5
  store ptr %43, ptr %44, align 8, !tbaa !5
  br label %45

45:                                               ; preds = %37
  br label %46

46:                                               ; preds = %45, %34, %20, %13
  %47 = load i32, ptr %8, align 4, !tbaa !11
  store i32 %47, ptr %4, align 4
  store i32 1, ptr %9, align 4
  br label %50

48:                                               ; No predecessors!
  br label %49

49:                                               ; preds = %48
  store i32 0, ptr %9, align 4
  br label %50

50:                                               ; preds = %49, %46
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  %51 = load i32, ptr %9, align 4
  switch i32 %51, label %54 [
    i32 0, label %52
    i32 1, label %52
  ]

52:                                               ; preds = %50, %50
  %53 = load i32, ptr %4, align 4
  ret i32 %53

54:                                               ; preds = %50
  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 nofree norecurse nosync nounwind willreturn memory(read, argmem: readwrite, inaccessiblemem: none) uwtable
define dso_local range(i32 0, 3) i32 @huf_symbol_mapping_get(ptr noundef readonly %0, i64 noundef %1, ptr noundef writeonly %2) local_unnamed_addr #0 {
  %4 = icmp eq ptr %0, null
  %5 = icmp eq ptr %2, null
  %or.cond = or i1 %4, %5
  br i1 %or.cond, label %15, label %6

6:                                                ; preds = %3
  %7 = load i64, ptr %0, align 8, !tbaa !5
  %8 = add i64 %7, -1
  %9 = icmp ult i64 %8, %1
  br i1 %9, label %15, label %10

10:                                               ; preds = %6
  %11 = getelementptr inbounds i8, ptr %0, i64 8
  %12 = load ptr, ptr %11, align 8, !tbaa !11
  %13 = getelementptr inbounds ptr, ptr %12, i64 %1
  %14 = load ptr, ptr %13, align 8, !tbaa !12
  store ptr %14, ptr %2, align 8, !tbaa !12
  br label %15

15:                                               ; preds = %6, %3, %10
  %.0 = phi i32 [ 0, %10 ], [ 2, %3 ], [ 2, %6 ]
  ret i32 %.0
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: readwrite, inaccessiblemem: none) 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" }

!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,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass