; LLVM IR from wmcnamara/crynn :: lib/thirdparty/assimp/contrib/Open3DGC (o3dgcArithmeticCodec)

; 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"

%"class.o3dgc::Static_Bit_Model" = type { i32 }
%"class.o3dgc::Arithmetic_Codec" = type <{ ptr, ptr, ptr, i32, i32, i32, i32, i32, [4 x i8] }>

; 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: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZN5o3dgc16Arithmetic_Codec19renorm_dec_intervalEv(ptr noundef nonnull align 8 dereferenceable(44)) #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_ZN5o3dgc16Arithmetic_Codec6decodeERNS_16Static_Bit_ModelE(ptr noundef nonnull align 8 dereferenceable(44) %0, ptr noundef nonnull align 4 dereferenceable(4) %1) #2 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  %7 = load ptr, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  %8 = load ptr, ptr %4, align 8, !tbaa !5
  %9 = getelementptr inbounds %"class.o3dgc::Static_Bit_Model", ptr %8, i32 0, i32 0
  %10 = load i32, ptr %9, align 4, !tbaa !9
  %11 = getelementptr inbounds %"class.o3dgc::Arithmetic_Codec", ptr %7, i32 0, i32 5
  %12 = load i32, ptr %11, align 8, !tbaa !12
  %13 = lshr i32 %12, 13
  %14 = mul i32 %10, %13
  store i32 %14, ptr %5, align 4, !tbaa !14
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  %15 = getelementptr inbounds %"class.o3dgc::Arithmetic_Codec", ptr %7, i32 0, i32 4
  %16 = load i32, ptr %15, align 4, !tbaa !15
  %17 = load i32, ptr %5, align 4, !tbaa !14
  %18 = icmp uge i32 %16, %17
  %19 = zext i1 %18 to i32
  store i32 %19, ptr %6, align 4, !tbaa !14
  %20 = load i32, ptr %6, align 4, !tbaa !14
  %21 = icmp eq i32 %20, 0
  br i1 %21, label %22, label %25

22:                                               ; preds = %2
  %23 = load i32, ptr %5, align 4, !tbaa !14
  %24 = getelementptr inbounds %"class.o3dgc::Arithmetic_Codec", ptr %7, i32 0, i32 5
  store i32 %23, ptr %24, align 8, !tbaa !12
  br label %34

25:                                               ; preds = %2
  %26 = load i32, ptr %5, align 4, !tbaa !14
  %27 = getelementptr inbounds %"class.o3dgc::Arithmetic_Codec", ptr %7, i32 0, i32 4
  %28 = load i32, ptr %27, align 4, !tbaa !15
  %29 = sub i32 %28, %26
  store i32 %29, ptr %27, align 4, !tbaa !15
  %30 = load i32, ptr %5, align 4, !tbaa !14
  %31 = getelementptr inbounds %"class.o3dgc::Arithmetic_Codec", ptr %7, i32 0, i32 5
  %32 = load i32, ptr %31, align 8, !tbaa !12
  %33 = sub i32 %32, %30
  store i32 %33, ptr %31, align 8, !tbaa !12
  br label %34

34:                                               ; preds = %25, %22
  %35 = getelementptr inbounds %"class.o3dgc::Arithmetic_Codec", ptr %7, i32 0, i32 5
  %36 = load i32, ptr %35, align 8, !tbaa !12
  %37 = icmp ult i32 %36, 16777216
  br i1 %37, label %38, label %39

38:                                               ; preds = %34
  call void @_ZN5o3dgc16Arithmetic_Codec19renorm_dec_intervalEv(ptr noundef nonnull align 8 dereferenceable(44) %7)
  br label %39

39:                                               ; preds = %38, %34
  %40 = load i32, ptr %6, align 4, !tbaa !14
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  ret i32 %40
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { inlinehint mustprogress 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 = { mustprogress 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++ TBAA"}
!9 = !{!10, !11, i64 0}
!10 = !{!"_ZTSN5o3dgc16Static_Bit_ModelE", !11, i64 0}
!11 = !{!"int", !7, i64 0}
!12 = !{!13, !11, i64 32}
!13 = !{!"_ZTSN5o3dgc16Arithmetic_CodecE", !6, i64 0, !6, i64 8, !6, i64 16, !11, i64 24, !11, i64 28, !11, i64 32, !11, i64 36, !11, i64 40}
!14 = !{!11, !11, i64 0}
!15 = !{!13, !11, i64 28}


; 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: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZN5o3dgc16Arithmetic_Codec19renorm_dec_intervalEv(ptr noundef nonnull align 8 dereferenceable(44)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef range(i32 0, 2) i32 @_ZN5o3dgc16Arithmetic_Codec6decodeERNS_16Static_Bit_ModelE(ptr noundef nonnull align 8 dereferenceable(44) %0, ptr nocapture noundef nonnull readonly align 4 dereferenceable(4) %1) local_unnamed_addr #1 align 2 {
  %3 = load i32, ptr %1, align 4, !tbaa !5
  %4 = getelementptr inbounds i8, ptr %0, i64 32
  %5 = load i32, ptr %4, align 8, !tbaa !10
  %6 = lshr i32 %5, 13
  %7 = mul i32 %6, %3
  %8 = getelementptr inbounds i8, ptr %0, i64 28
  %9 = load i32, ptr %8, align 4, !tbaa !13
  %10 = icmp uge i32 %9, %7
  br i1 %10, label %11, label %14

11:                                               ; preds = %2
  %12 = sub i32 %9, %7
  store i32 %12, ptr %8, align 4, !tbaa !13
  %13 = sub i32 %5, %7
  br label %14

14:                                               ; preds = %2, %11
  %storemerge = phi i32 [ %13, %11 ], [ %7, %2 ]
  store i32 %storemerge, ptr %4, align 8, !tbaa !10
  %15 = icmp ult i32 %storemerge, 16777216
  br i1 %15, label %16, label %17

16:                                               ; preds = %14
  tail call void @_ZN5o3dgc16Arithmetic_Codec19renorm_dec_intervalEv(ptr noundef nonnull align 8 dereferenceable(44) %0)
  br label %17

17:                                               ; preds = %16, %14
  %18 = zext i1 %10 to i32
  ret i32 %18
}

attributes #0 = { inlinehint mustprogress 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 = { mustprogress 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" }

!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 = !{!"_ZTSN5o3dgc16Static_Bit_ModelE", !7, i64 0}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!11, !7, i64 32}
!11 = !{!"_ZTSN5o3dgc16Arithmetic_CodecE", !12, i64 0, !12, i64 8, !12, i64 16, !7, i64 24, !7, i64 28, !7, i64 32, !7, i64 36, !7, i64 40}
!12 = !{!"any pointer", !8, i64 0}
!13 = !{!11, !7, i64 28}


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