; LLVM IR from glaretechnologies/substrata :: resonance-audio/resonance_audio/dsp/biquad_filter.ll (ZN7vraudio12BiquadFilter5ClearEv)

; 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.std::array" = type { [2 x float] }
%"class.vraudio::BiquadFilter" = type <{ %"struct.std::array", i8, [7 x i8], i64, %"struct.std::array", i64, float, %"struct.vraudio::BiquadCoefficients", %"struct.vraudio::BiquadCoefficients", [4 x i8] }>
%"struct.vraudio::BiquadCoefficients" = type { %"struct.std::array.0", %"struct.std::array.0" }
%"struct.std::array.0" = type { [3 x float] }

; 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: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #1

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN7vraudio12BiquadFilter5ClearEv(ptr noundef nonnull align 8 dereferenceable(92) %0) #2 align 2 {
  %2 = alloca ptr, align 8
  %3 = alloca %"struct.std::array", align 4
  %4 = alloca %"struct.std::array", align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  %5 = load ptr, ptr %2, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  %6 = getelementptr inbounds %"struct.std::array", ptr %3, i32 0, i32 0
  store float 0.000000e+00, ptr %6, align 4, !tbaa !9
  %7 = getelementptr inbounds float, ptr %6, i64 1
  store float 0.000000e+00, ptr %7, align 4, !tbaa !9
  %8 = getelementptr inbounds %"class.vraudio::BiquadFilter", ptr %5, i32 0, i32 0
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %8, ptr align 4 %3, i64 8, i1 false), !tbaa.struct !11
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  %9 = getelementptr inbounds %"class.vraudio::BiquadFilter", ptr %5, i32 0, i32 1
  store i8 0, ptr %9, align 8, !tbaa !13
  %10 = getelementptr inbounds %"class.vraudio::BiquadFilter", ptr %5, i32 0, i32 3
  store i64 0, ptr %10, align 8, !tbaa !20
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %11 = getelementptr inbounds %"struct.std::array", ptr %4, i32 0, i32 0
  store float 0.000000e+00, ptr %11, align 4, !tbaa !9
  %12 = getelementptr inbounds float, ptr %11, i64 1
  store float 0.000000e+00, ptr %12, align 4, !tbaa !9
  %13 = getelementptr inbounds %"class.vraudio::BiquadFilter", ptr %5, i32 0, i32 4
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %13, ptr align 4 %4, i64 8, i1 false), !tbaa.struct !11
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nocallback nofree 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 = { 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 = !{!"float", !7, i64 0}
!11 = !{i64 0, i64 8, !12}
!12 = !{!7, !7, i64 0}
!13 = !{!14, !16, i64 8}
!14 = !{!"_ZTSN7vraudio12BiquadFilterE", !15, i64 0, !16, i64 8, !17, i64 16, !15, i64 24, !17, i64 32, !10, i64 40, !18, i64 44, !18, i64 68}
!15 = !{!"_ZTSSt5arrayIfLm2EE", !7, i64 0}
!16 = !{!"bool", !7, i64 0}
!17 = !{!"long", !7, i64 0}
!18 = !{!"_ZTSN7vraudio18BiquadCoefficientsE", !19, i64 0, !19, i64 12}
!19 = !{!"_ZTSSt5arrayIfLm3EE", !7, i64 0}
!20 = !{!14, !17, i64 16}


; 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(argmem: write) uwtable
define dso_local void @_ZN7vraudio12BiquadFilter5ClearEv(ptr nocapture noundef nonnull writeonly align 8 dereferenceable(92) %0) local_unnamed_addr #0 align 2 {
  %2 = getelementptr inbounds i8, ptr %0, i64 16
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(9) %0, i8 0, i64 9, i1 false)
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(16) %2, i8 0, i64 16, i1 false)
  ret void
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #1

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: write) 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 nounwind willreturn memory(argmem: write) }

!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)"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,MemCpyOptPass,PostOrderFunctionAttrsPass,SROAPass,TailCallElimPass