; LLVM IR from kdrag0n/fxdsp :: effects/graphic_eq_iir.ll (ZN5fxdsp18IirGraphicEqEffect13build_filtersEv)

; 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.__gnu_cxx::__normal_iterator" = type { ptr }
%"class.fxdsp::IirGraphicEqEffect" = type { %"class.fxdsp::GraphicEqBase", %"class.fxdsp::ParametricEqEffect" }
%"class.fxdsp::GraphicEqBase" = type { %"class.fxdsp::Effect.base", %"class.std::vector.0" }
%"class.fxdsp::Effect.base" = type <{ %"class.fxdsp::AudioSink", ptr, i8 }>
%"class.fxdsp::AudioSink" = type { ptr, %"class.std::vector", i32, i32 }
%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<std::vector<float>, std::allocator<std::vector<float>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::vector<float>, std::allocator<std::vector<float>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::vector<float>, std::allocator<std::vector<float>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::vector<float>, std::allocator<std::vector<float>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.std::vector.0" = type { %"struct.std::_Vector_base.1" }
%"struct.std::_Vector_base.1" = type { %"struct.std::_Vector_base<fxdsp::GraphicEqBand, std::allocator<fxdsp::GraphicEqBand>>::_Vector_impl" }
%"struct.std::_Vector_base<fxdsp::GraphicEqBand, std::allocator<fxdsp::GraphicEqBand>>::_Vector_impl" = type { %"struct.std::_Vector_base<fxdsp::GraphicEqBand, std::allocator<fxdsp::GraphicEqBand>>::_Vector_impl_data" }
%"struct.std::_Vector_base<fxdsp::GraphicEqBand, std::allocator<fxdsp::GraphicEqBand>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.fxdsp::ParametricEqEffect" = type <{ %"class.fxdsp::Effect.base", [7 x i8], %"class.std::vector.5", i32, [4 x i8] }>
%"class.std::vector.5" = type { %"struct.std::_Vector_base.6" }
%"struct.std::_Vector_base.6" = type { %"struct.std::_Vector_base<std::vector<std::unique_ptr<fxdsp::BiquadFilter>>, std::allocator<std::vector<std::unique_ptr<fxdsp::BiquadFilter>>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::vector<std::unique_ptr<fxdsp::BiquadFilter>>, std::allocator<std::vector<std::unique_ptr<fxdsp::BiquadFilter>>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::vector<std::unique_ptr<fxdsp::BiquadFilter>>, std::allocator<std::vector<std::unique_ptr<fxdsp::BiquadFilter>>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::vector<std::unique_ptr<fxdsp::BiquadFilter>>, std::allocator<std::vector<std::unique_ptr<fxdsp::BiquadFilter>>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"struct.fxdsp::GraphicEqBand" = type { float, float, float }

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN5fxdsp18IirGraphicEqEffect13build_filtersEv(ptr noundef nonnull align 8 dereferenceable(168) %0) unnamed_addr #0 align 2 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %5 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %6 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %7 = load ptr, ptr %2, align 8
  %8 = getelementptr inbounds %"class.fxdsp::IirGraphicEqEffect", ptr %7, i32 0, i32 1
  call void @_ZN5fxdsp18ParametricEqEffect18remove_all_filtersEv(ptr noundef nonnull align 8 dereferenceable(84) %8)
  %9 = getelementptr inbounds %"class.fxdsp::IirGraphicEqEffect", ptr %7, i32 0, i32 1
  %10 = getelementptr inbounds %"class.fxdsp::GraphicEqBase", ptr %7, i32 0, i32 1
  %11 = call noundef i64 @_ZNKSt6vectorIN5fxdsp13GraphicEqBandESaIS1_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %10) #5
  %12 = trunc i64 %11 to i32
  call void @_ZN5fxdsp18ParametricEqEffect15reserve_filtersEi(ptr noundef nonnull align 8 dereferenceable(84) %9, i32 noundef %12)
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #5
  %13 = getelementptr inbounds %"class.fxdsp::GraphicEqBase", ptr %7, i32 0, i32 1
  store ptr %13, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #5
  %14 = load ptr, ptr %3, align 8, !tbaa !5
  %15 = call ptr @_ZNSt6vectorIN5fxdsp13GraphicEqBandESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %14) #5
  %16 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %4, i32 0, i32 0
  store ptr %15, ptr %16, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #5
  %17 = load ptr, ptr %3, align 8, !tbaa !5
  %18 = call ptr @_ZNSt6vectorIN5fxdsp13GraphicEqBandESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %17) #5
  %19 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %5, i32 0, i32 0
  store ptr %18, ptr %19, align 8
  br label %20

20:                                               ; preds = %39, %1
  %21 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPN5fxdsp13GraphicEqBandESt6vectorIS2_SaIS2_EEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8) %4, ptr noundef nonnull align 8 dereferenceable(8) %5) #5
  br i1 %21, label %23, label %22

22:                                               ; preds = %20
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #5
  br label %41

23:                                               ; preds = %20
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #5
  %24 = call noundef nonnull align 4 dereferenceable(12) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPN5fxdsp13GraphicEqBandESt6vectorIS2_SaIS2_EEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %4) #5
  store ptr %24, ptr %6, align 8, !tbaa !5
  br label %25

25:                                               ; preds = %23
  br label %26

26:                                               ; preds = %25
  br label %27

27:                                               ; preds = %26
  %28 = getelementptr inbounds %"class.fxdsp::IirGraphicEqEffect", ptr %7, i32 0, i32 1
  %29 = load ptr, ptr %6, align 8, !tbaa !5
  %30 = getelementptr inbounds %"struct.fxdsp::GraphicEqBand", ptr %29, i32 0, i32 0
  %31 = load float, ptr %30, align 4, !tbaa !9
  %32 = load ptr, ptr %6, align 8, !tbaa !5
  %33 = getelementptr inbounds %"struct.fxdsp::GraphicEqBand", ptr %32, i32 0, i32 1
  %34 = load float, ptr %33, align 4, !tbaa !12
  %35 = load ptr, ptr %6, align 8, !tbaa !5
  %36 = getelementptr inbounds %"struct.fxdsp::GraphicEqBand", ptr %35, i32 0, i32 2
  %37 = load float, ptr %36, align 4, !tbaa !13
  %38 = call noundef i32 @_ZN5fxdsp18ParametricEqEffect10add_filterENS_16BiquadFilterTypeEfff(ptr noundef nonnull align 8 dereferenceable(84) %28, i32 noundef 6, float noundef %31, float noundef %34, float noundef %37)
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #5
  br label %39

39:                                               ; preds = %27
  %40 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPN5fxdsp13GraphicEqBandESt6vectorIS2_SaIS2_EEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %4) #5
  br label %20

41:                                               ; preds = %22
  ret void
}

declare void @_ZN5fxdsp18ParametricEqEffect18remove_all_filtersEv(ptr noundef nonnull align 8 dereferenceable(84)) #1

declare void @_ZN5fxdsp18ParametricEqEffect15reserve_filtersEi(ptr noundef nonnull align 8 dereferenceable(84), i32 noundef) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIN5fxdsp13GraphicEqBandESaIS1_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIN5fxdsp13GraphicEqBandESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIN5fxdsp13GraphicEqBandESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN9__gnu_cxxneIPN5fxdsp13GraphicEqBandESt6vectorIS2_SaIS2_EEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #4

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(12) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPN5fxdsp13GraphicEqBandESt6vectorIS2_SaIS2_EEEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) #2 align 2

declare noundef i32 @_ZN5fxdsp18ParametricEqEffect10add_filterENS_16BiquadFilterTypeEfff(ptr noundef nonnull align 8 dereferenceable(84), i32 noundef, float noundef, float noundef, float noundef) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPN5fxdsp13GraphicEqBandESt6vectorIS2_SaIS2_EEEppEv(ptr noundef nonnull align 8 dereferenceable(8)) #2 align 2

attributes #0 = { 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 #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 = { 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 #3 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #4 = { 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 #5 = { 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 = !{!"_ZTSN5fxdsp13GraphicEqBandE", !11, i64 0, !11, i64 4, !11, i64 8}
!11 = !{!"float", !7, i64 0}
!12 = !{!10, !11, i64 4}
!13 = !{!10, !11, 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"

%"class.__gnu_cxx::__normal_iterator" = type { ptr }

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN5fxdsp18IirGraphicEqEffect13build_filtersEv(ptr noundef nonnull align 8 dereferenceable(168) %0) unnamed_addr #0 align 2 {
  %2 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %3 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %4 = getelementptr inbounds i8, ptr %0, i64 80
  tail call void @_ZN5fxdsp18ParametricEqEffect18remove_all_filtersEv(ptr noundef nonnull align 8 dereferenceable(84) %4)
  %5 = getelementptr inbounds i8, ptr %0, i64 56
  %6 = tail call noundef i64 @_ZNKSt6vectorIN5fxdsp13GraphicEqBandESaIS1_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %5) #5
  %7 = trunc i64 %6 to i32
  tail call void @_ZN5fxdsp18ParametricEqEffect15reserve_filtersEi(ptr noundef nonnull align 8 dereferenceable(84) %4, i32 noundef %7)
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #5
  %8 = tail call ptr @_ZNSt6vectorIN5fxdsp13GraphicEqBandESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %5) #5
  store ptr %8, ptr %2, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #5
  %9 = tail call ptr @_ZNSt6vectorIN5fxdsp13GraphicEqBandESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %5) #5
  store ptr %9, ptr %3, align 8
  %10 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPN5fxdsp13GraphicEqBandESt6vectorIS2_SaIS2_EEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8) %2, ptr noundef nonnull align 8 dereferenceable(8) %3) #5
  br i1 %10, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %1
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #5
  ret void

.lr.ph:                                           ; preds = %1, %.lr.ph
  %11 = call noundef nonnull align 4 dereferenceable(12) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPN5fxdsp13GraphicEqBandESt6vectorIS2_SaIS2_EEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %2) #5
  %12 = load float, ptr %11, align 4, !tbaa !5
  %13 = getelementptr inbounds i8, ptr %11, i64 4
  %14 = load float, ptr %13, align 4, !tbaa !10
  %15 = getelementptr inbounds i8, ptr %11, i64 8
  %16 = load float, ptr %15, align 4, !tbaa !11
  %17 = call noundef i32 @_ZN5fxdsp18ParametricEqEffect10add_filterENS_16BiquadFilterTypeEfff(ptr noundef nonnull align 8 dereferenceable(84) %4, i32 noundef 6, float noundef %12, float noundef %14, float noundef %16)
  %18 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPN5fxdsp13GraphicEqBandESt6vectorIS2_SaIS2_EEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %2) #5
  %19 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPN5fxdsp13GraphicEqBandESt6vectorIS2_SaIS2_EEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8) %2, ptr noundef nonnull align 8 dereferenceable(8) %3) #5
  br i1 %19, label %.lr.ph, label %._crit_edge
}

declare void @_ZN5fxdsp18ParametricEqEffect18remove_all_filtersEv(ptr noundef nonnull align 8 dereferenceable(84)) local_unnamed_addr #1

declare void @_ZN5fxdsp18ParametricEqEffect15reserve_filtersEi(ptr noundef nonnull align 8 dereferenceable(84), i32 noundef) local_unnamed_addr #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIN5fxdsp13GraphicEqBandESaIS1_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIN5fxdsp13GraphicEqBandESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIN5fxdsp13GraphicEqBandESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #2 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN9__gnu_cxxneIPN5fxdsp13GraphicEqBandESt6vectorIS2_SaIS2_EEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #4

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(12) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPN5fxdsp13GraphicEqBandESt6vectorIS2_SaIS2_EEEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #2 align 2

declare noundef i32 @_ZN5fxdsp18ParametricEqEffect10add_filterENS_16BiquadFilterTypeEfff(ptr noundef nonnull align 8 dereferenceable(84), i32 noundef, float noundef, float noundef, float noundef) local_unnamed_addr #1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPN5fxdsp13GraphicEqBandESt6vectorIS2_SaIS2_EEEppEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #2 align 2

attributes #0 = { 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 #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 = { 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 #3 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #4 = { 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 #5 = { 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 = !{!"_ZTSN5fxdsp13GraphicEqBandE", !7, i64 0, !7, i64 4, !7, i64 8}
!7 = !{!"float", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!6, !7, i64 4}
!11 = !{!6, !7, i64 8}


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