; LLVM IR from kdrag0n/fxdsp :: effects/silence.ll (ZN5fxdsp13SilenceEffect11write_audioERSt6vectorIS1_IfSaIfEESaIS3_EE)

; 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.__gnu_cxx::__normal_iterator.10" = type { ptr }
%"class.fxdsp::Effect" = type <{ %"class.fxdsp::AudioSink", ptr, i8, [7 x 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 }

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN5fxdsp13SilenceEffect11write_audioERSt6vectorIS1_IfSaIfEESaIS3_EE(ptr noundef nonnull align 8 dereferenceable(49) %0, ptr noundef nonnull align 8 dereferenceable(24) %1) unnamed_addr #0 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %7 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %8 = alloca ptr, align 8
  %9 = alloca %"class.__gnu_cxx::__normal_iterator.10", align 8
  %10 = alloca %"class.__gnu_cxx::__normal_iterator.10", align 8
  %11 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  %12 = load ptr, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #5
  %13 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %13, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #5
  %14 = load ptr, ptr %5, align 8, !tbaa !5
  %15 = call ptr @_ZNSt6vectorIS_IfSaIfEESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %14) #5
  %16 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %6, i32 0, i32 0
  store ptr %15, ptr %16, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #5
  %17 = load ptr, ptr %5, align 8, !tbaa !5
  %18 = call ptr @_ZNSt6vectorIS_IfSaIfEESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %17) #5
  %19 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %7, i32 0, i32 0
  store ptr %18, ptr %19, align 8
  br label %20

20:                                               ; preds = %35, %2
  %21 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPSt6vectorIfSaIfEES1_IS3_SaIS3_EEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8) %6, ptr noundef nonnull align 8 dereferenceable(8) %7) #5
  br i1 %21, label %23, label %22

22:                                               ; preds = %20
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #5
  br label %37

23:                                               ; preds = %20
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #5
  %24 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt6vectorIfSaIfEES1_IS3_SaIS3_EEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %6) #5
  store ptr %24, ptr %8, align 8, !tbaa !5
  %25 = load ptr, ptr %8, align 8, !tbaa !5
  %26 = call ptr @_ZNSt6vectorIfSaIfEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %25) #5
  %27 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator.10", ptr %9, i32 0, i32 0
  store ptr %26, ptr %27, align 8
  %28 = load ptr, ptr %8, align 8, !tbaa !5
  %29 = call ptr @_ZNSt6vectorIfSaIfEE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %28) #5
  %30 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator.10", ptr %10, i32 0, i32 0
  store ptr %29, ptr %30, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #5
  store i32 0, ptr %11, align 4, !tbaa !9
  %31 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator.10", ptr %9, i32 0, i32 0
  %32 = load ptr, ptr %31, align 8
  %33 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator.10", ptr %10, i32 0, i32 0
  %34 = load ptr, ptr %33, align 8
  call void @_ZSt4fillIN9__gnu_cxx17__normal_iteratorIPfSt6vectorIfSaIfEEEEiEvT_S7_RKT0_(ptr %32, ptr %34, ptr noundef nonnull align 4 dereferenceable(4) %11)
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #5
  br label %35

35:                                               ; preds = %23
  %36 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPSt6vectorIfSaIfEES1_IS3_SaIS3_EEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %6) #5
  br label %20

37:                                               ; preds = %22
  %38 = getelementptr inbounds %"class.fxdsp::Effect", ptr %12, i32 0, i32 1
  %39 = load ptr, ptr %38, align 8, !tbaa !11
  %40 = load ptr, ptr %4, align 8, !tbaa !5
  %41 = load ptr, ptr %39, align 8, !tbaa !20
  %42 = getelementptr inbounds ptr, ptr %41, i64 2
  %43 = load ptr, ptr %42, align 8
  call void %43(ptr noundef nonnull align 8 dereferenceable(40) %39, ptr noundef nonnull align 8 dereferenceable(24) %40)
  ret void
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIS_IfSaIfEESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIS_IfSaIfEESaIS1_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_cxxneIPSt6vectorIfSaIfEES1_IS3_SaIS3_EEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(24) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt6vectorIfSaIfEES1_IS3_SaIS3_EEEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) #2 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZSt4fillIN9__gnu_cxx17__normal_iteratorIPfSt6vectorIfSaIfEEEEiEvT_S7_RKT0_(ptr, ptr, ptr noundef nonnull align 4 dereferenceable(4)) #4

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIfSaIfEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIfSaIfEE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPSt6vectorIfSaIfEES1_IS3_SaIS3_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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { 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 #4 = { inlinehint 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 #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, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !6, i64 40}
!12 = !{!"_ZTSN5fxdsp6EffectE", !13, i64 0, !6, i64 40, !19, i64 48}
!13 = !{!"_ZTSN5fxdsp9AudioSinkE", !14, i64 8, !18, i64 32, !10, i64 36}
!14 = !{!"_ZTSSt6vectorIS_IfSaIfEESaIS1_EE", !15, i64 0}
!15 = !{!"_ZTSSt12_Vector_baseISt6vectorIfSaIfEESaIS2_EE", !16, i64 0}
!16 = !{!"_ZTSNSt12_Vector_baseISt6vectorIfSaIfEESaIS2_EE12_Vector_implE", !17, i64 0}
!17 = !{!"_ZTSNSt12_Vector_baseISt6vectorIfSaIfEESaIS2_EE17_Vector_impl_dataE", !6, i64 0, !6, i64 8, !6, i64 16}
!18 = !{!"_ZTSN5fxdsp11AudioFormatE", !7, i64 0}
!19 = !{!"bool", !7, i64 0}
!20 = !{!21, !21, i64 0}
!21 = !{!"vtable pointer", !8, i64 0}


; 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 @_ZN5fxdsp13SilenceEffect11write_audioERSt6vectorIS1_IfSaIfEESaIS3_EE(ptr nocapture noundef nonnull readonly align 8 dereferenceable(49) %0, ptr noundef nonnull align 8 dereferenceable(24) %1) unnamed_addr #0 align 2 {
  %3 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %4 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %5 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #5
  %6 = tail call ptr @_ZNSt6vectorIS_IfSaIfEESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %1) #5
  store ptr %6, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #5
  %7 = tail call ptr @_ZNSt6vectorIS_IfSaIfEESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %1) #5
  store ptr %7, ptr %4, align 8
  %8 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPSt6vectorIfSaIfEES1_IS3_SaIS3_EEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(8) %4) #5
  br i1 %8, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %2
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #5
  %9 = getelementptr inbounds i8, ptr %0, i64 40
  %10 = load ptr, ptr %9, align 8, !tbaa !5
  %11 = load ptr, ptr %10, align 8, !tbaa !18
  %12 = getelementptr inbounds i8, ptr %11, i64 16
  %13 = load ptr, ptr %12, align 8
  call void %13(ptr noundef nonnull align 8 dereferenceable(40) %10, ptr noundef nonnull align 8 dereferenceable(24) %1)
  ret void

.lr.ph:                                           ; preds = %2, %.lr.ph
  %14 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt6vectorIfSaIfEES1_IS3_SaIS3_EEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %3) #5
  %15 = call ptr @_ZNSt6vectorIfSaIfEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %14) #5
  %16 = call ptr @_ZNSt6vectorIfSaIfEE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %14) #5
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %5) #5
  store i32 0, ptr %5, align 4, !tbaa !20
  call void @_ZSt4fillIN9__gnu_cxx17__normal_iteratorIPfSt6vectorIfSaIfEEEEiEvT_S7_RKT0_(ptr %15, ptr %16, ptr noundef nonnull align 4 dereferenceable(4) %5)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %5) #5
  %17 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPSt6vectorIfSaIfEES1_IS3_SaIS3_EEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %3) #5
  %18 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPSt6vectorIfSaIfEES1_IS3_SaIS3_EEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(8) %4) #5
  br i1 %18, label %.lr.ph, label %._crit_edge
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIS_IfSaIfEESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIS_IfSaIfEESaIS1_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_cxxneIPSt6vectorIfSaIfEES1_IS3_SaIS3_EEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(24) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt6vectorIfSaIfEES1_IS3_SaIS3_EEEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #2 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZSt4fillIN9__gnu_cxx17__normal_iteratorIPfSt6vectorIfSaIfEEEEiEvT_S7_RKT0_(ptr, ptr, ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #4

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIfSaIfEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIfSaIfEE3endEv(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.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPSt6vectorIfSaIfEES1_IS3_SaIS3_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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { 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 #4 = { inlinehint 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 #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, !12, i64 40}
!6 = !{!"_ZTSN5fxdsp6EffectE", !7, i64 0, !12, i64 40, !17, i64 48}
!7 = !{!"_ZTSN5fxdsp9AudioSinkE", !8, i64 8, !15, i64 32, !16, i64 36}
!8 = !{!"_ZTSSt6vectorIS_IfSaIfEESaIS1_EE", !9, i64 0}
!9 = !{!"_ZTSSt12_Vector_baseISt6vectorIfSaIfEESaIS2_EE", !10, i64 0}
!10 = !{!"_ZTSNSt12_Vector_baseISt6vectorIfSaIfEESaIS2_EE12_Vector_implE", !11, i64 0}
!11 = !{!"_ZTSNSt12_Vector_baseISt6vectorIfSaIfEESaIS2_EE17_Vector_impl_dataE", !12, i64 0, !12, i64 8, !12, i64 16}
!12 = !{!"any pointer", !13, i64 0}
!13 = !{!"omnipotent char", !14, i64 0}
!14 = !{!"Simple C++ TBAA"}
!15 = !{!"_ZTSN5fxdsp11AudioFormatE", !13, i64 0}
!16 = !{!"int", !13, i64 0}
!17 = !{!"bool", !13, i64 0}
!18 = !{!19, !19, i64 0}
!19 = !{!"vtable pointer", !14, i64 0}
!20 = !{!16, !16, i64 0}


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