; LLVM IR from modlfo/AudioEngine :: AudioEngine/JuceLibraryCode (juce_audio_basics)

; 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.juce::FFT" = type <{ %"class.juce::ScopedPointer.27", i32, [4 x i8] }>
%"class.juce::ScopedPointer.27" = type { ptr }
%"struct.juce::FFT::Complex" = type { float, 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: mustprogress nounwind uwtable
declare dso_local void @_ZNK4juce3FFT7performEPKNS0_7ComplexEPS1_(ptr noundef nonnull align 8 dereferenceable(12), ptr noundef, ptr noundef) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZNK4juce3FFT31performRealOnlyForwardTransformEPNS0_7ComplexEPf(ptr noundef nonnull align 8 dereferenceable(12) %0, ptr noundef %1, ptr noundef %2) #1 align 2 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  store ptr %2, ptr %6, align 8, !tbaa !5
  %8 = load ptr, ptr %4, align 8
  br label %9

9:                                                ; preds = %3
  br label %10

10:                                               ; preds = %9
  br label %11

11:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  store i32 0, ptr %7, align 4, !tbaa !9
  br label %12

12:                                               ; preds = %34, %11
  %13 = load i32, ptr %7, align 4, !tbaa !9
  %14 = getelementptr inbounds %"class.juce::FFT", ptr %8, i32 0, i32 1
  %15 = load i32, ptr %14, align 8, !tbaa !11
  %16 = icmp slt i32 %13, %15
  br i1 %16, label %18, label %17

17:                                               ; preds = %12
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  br label %37

18:                                               ; preds = %12
  %19 = load ptr, ptr %6, align 8, !tbaa !5
  %20 = load i32, ptr %7, align 4, !tbaa !9
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds float, ptr %19, i64 %21
  %23 = load float, ptr %22, align 4, !tbaa !14
  %24 = load ptr, ptr %5, align 8, !tbaa !5
  %25 = load i32, ptr %7, align 4, !tbaa !9
  %26 = sext i32 %25 to i64
  %27 = getelementptr inbounds %"struct.juce::FFT::Complex", ptr %24, i64 %26
  %28 = getelementptr inbounds %"struct.juce::FFT::Complex", ptr %27, i32 0, i32 0
  store float %23, ptr %28, align 4, !tbaa !16
  %29 = load ptr, ptr %5, align 8, !tbaa !5
  %30 = load i32, ptr %7, align 4, !tbaa !9
  %31 = sext i32 %30 to i64
  %32 = getelementptr inbounds %"struct.juce::FFT::Complex", ptr %29, i64 %31
  %33 = getelementptr inbounds %"struct.juce::FFT::Complex", ptr %32, i32 0, i32 1
  store float 0.000000e+00, ptr %33, align 4, !tbaa !18
  br label %34

34:                                               ; preds = %18
  %35 = load i32, ptr %7, align 4, !tbaa !9
  %36 = add nsw i32 %35, 1
  store i32 %36, ptr %7, align 4, !tbaa !9
  br label %12, !llvm.loop !19

37:                                               ; preds = %17
  %38 = load ptr, ptr %5, align 8, !tbaa !5
  %39 = load ptr, ptr %6, align 8, !tbaa !5
  call void @_ZNK4juce3FFT7performEPKNS0_7ComplexEPS1_(ptr noundef nonnull align 8 dereferenceable(12) %8, ptr noundef %38, ptr noundef %39) #2
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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" }
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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 8}
!12 = !{!"_ZTSN4juce3FFTE", !13, i64 0, !10, i64 8}
!13 = !{!"_ZTSN4juce13ScopedPointerINS_3FFT9FFTConfigEEE", !6, i64 0}
!14 = !{!15, !15, i64 0}
!15 = !{!"float", !7, i64 0}
!16 = !{!17, !15, i64 0}
!17 = !{!"_ZTSN4juce3FFT7ComplexE", !15, i64 0, !15, i64 4}
!18 = !{!17, !15, i64 4}
!19 = distinct !{!19, !20}
!20 = !{!"llvm.loop.mustprogress"}


; 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"

%"struct.juce::FFT::Complex" = type { float, float }

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNK4juce3FFT7performEPKNS0_7ComplexEPS1_(ptr noundef nonnull align 8 dereferenceable(12), ptr noundef, ptr noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZNK4juce3FFT31performRealOnlyForwardTransformEPNS0_7ComplexEPf(ptr noundef nonnull align 8 dereferenceable(12) %0, ptr noundef %1, ptr noundef %2) local_unnamed_addr #0 align 2 {
  %4 = getelementptr inbounds i8, ptr %0, i64 8
  %5 = load i32, ptr %4, align 8, !tbaa !5
  %6 = icmp sgt i32 %5, 0
  br i1 %6, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %3
  %wide.trip.count = zext nneg i32 %5 to i64
  %min.iters.check = icmp ult i32 %5, 10
  br i1 %min.iters.check, label %.lr.ph.preheader15, label %vector.memcheck

.lr.ph.preheader15:                               ; preds = %middle.block, %vector.memcheck, %.lr.ph.preheader
  %indvars.iv.ph = phi i64 [ 0, %vector.memcheck ], [ 0, %.lr.ph.preheader ], [ %n.vec, %middle.block ]
  %xtraiter = and i64 %wide.trip.count, 3
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %.lr.ph.prol.loopexit, label %.lr.ph.prol

.lr.ph.prol:                                      ; preds = %.lr.ph.preheader15, %.lr.ph.prol
  %indvars.iv.prol = phi i64 [ %indvars.iv.next.prol, %.lr.ph.prol ], [ %indvars.iv.ph, %.lr.ph.preheader15 ]
  %prol.iter = phi i64 [ %prol.iter.next, %.lr.ph.prol ], [ 0, %.lr.ph.preheader15 ]
  %7 = getelementptr inbounds float, ptr %2, i64 %indvars.iv.prol
  %8 = load float, ptr %7, align 4, !tbaa !12
  %9 = getelementptr inbounds %"struct.juce::FFT::Complex", ptr %1, i64 %indvars.iv.prol
  store float %8, ptr %9, align 4, !tbaa !14
  %10 = getelementptr inbounds i8, ptr %9, i64 4
  store float 0.000000e+00, ptr %10, align 4, !tbaa !16
  %indvars.iv.next.prol = add nuw nsw i64 %indvars.iv.prol, 1
  %prol.iter.next = add i64 %prol.iter, 1
  %prol.iter.cmp.not = icmp eq i64 %prol.iter.next, %xtraiter
  br i1 %prol.iter.cmp.not, label %.lr.ph.prol.loopexit, label %.lr.ph.prol, !llvm.loop !17

.lr.ph.prol.loopexit:                             ; preds = %.lr.ph.prol, %.lr.ph.preheader15
  %indvars.iv.unr = phi i64 [ %indvars.iv.ph, %.lr.ph.preheader15 ], [ %indvars.iv.next.prol, %.lr.ph.prol ]
  %11 = sub nsw i64 %indvars.iv.ph, %wide.trip.count
  %12 = icmp ugt i64 %11, -4
  br i1 %12, label %._crit_edge, label %.lr.ph

vector.memcheck:                                  ; preds = %.lr.ph.preheader
  %13 = shl nuw nsw i64 %wide.trip.count, 3
  %scevgep = getelementptr i8, ptr %1, i64 %13
  %14 = shl nuw nsw i64 %wide.trip.count, 2
  %scevgep12 = getelementptr i8, ptr %2, i64 %14
  %bound0 = icmp ugt ptr %scevgep12, %1
  %bound1 = icmp ugt ptr %scevgep, %2
  %found.conflict = and i1 %bound0, %bound1
  br i1 %found.conflict, label %.lr.ph.preheader15, label %vector.ph

vector.ph:                                        ; preds = %vector.memcheck
  %n.vec = and i64 %wide.trip.count, 2147483644
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %15 = or disjoint i64 %index, 2
  %16 = getelementptr inbounds float, ptr %2, i64 %index
  %17 = getelementptr inbounds i8, ptr %16, i64 8
  %wide.load = load <2 x float>, ptr %16, align 4, !tbaa !12, !alias.scope !19
  %wide.load13 = load <2 x float>, ptr %17, align 4, !tbaa !12, !alias.scope !19
  %18 = getelementptr inbounds %"struct.juce::FFT::Complex", ptr %1, i64 %index
  %19 = getelementptr inbounds %"struct.juce::FFT::Complex", ptr %1, i64 %15
  %interleaved.vec = shufflevector <2 x float> %wide.load, <2 x float> zeroinitializer, <4 x i32> <i32 0, i32 2, i32 1, i32 3>
  store <4 x float> %interleaved.vec, ptr %18, align 4, !tbaa !12
  %interleaved.vec14 = shufflevector <2 x float> %wide.load13, <2 x float> zeroinitializer, <4 x i32> <i32 0, i32 2, i32 1, i32 3>
  store <4 x float> %interleaved.vec14, ptr %19, align 4, !tbaa !12
  %index.next = add nuw i64 %index, 4
  %20 = icmp eq i64 %index.next, %n.vec
  br i1 %20, label %middle.block, label %vector.body, !llvm.loop !22

middle.block:                                     ; preds = %vector.body
  %cmp.n = icmp eq i64 %n.vec, %wide.trip.count
  br i1 %cmp.n, label %._crit_edge, label %.lr.ph.preheader15

._crit_edge:                                      ; preds = %.lr.ph.prol.loopexit, %.lr.ph, %middle.block, %3
  tail call void @_ZNK4juce3FFT7performEPKNS0_7ComplexEPS1_(ptr noundef nonnull align 8 dereferenceable(12) %0, ptr noundef %1, ptr noundef %2) #1
  ret void

.lr.ph:                                           ; preds = %.lr.ph.prol.loopexit, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next.3, %.lr.ph ], [ %indvars.iv.unr, %.lr.ph.prol.loopexit ]
  %21 = getelementptr inbounds float, ptr %2, i64 %indvars.iv
  %22 = load float, ptr %21, align 4, !tbaa !12
  %23 = getelementptr inbounds %"struct.juce::FFT::Complex", ptr %1, i64 %indvars.iv
  store float %22, ptr %23, align 4, !tbaa !14
  %24 = getelementptr inbounds i8, ptr %23, i64 4
  store float 0.000000e+00, ptr %24, align 4, !tbaa !16
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %25 = getelementptr inbounds float, ptr %2, i64 %indvars.iv.next
  %26 = load float, ptr %25, align 4, !tbaa !12
  %27 = getelementptr inbounds %"struct.juce::FFT::Complex", ptr %1, i64 %indvars.iv.next
  store float %26, ptr %27, align 4, !tbaa !14
  %28 = getelementptr inbounds i8, ptr %27, i64 4
  store float 0.000000e+00, ptr %28, align 4, !tbaa !16
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %29 = getelementptr inbounds float, ptr %2, i64 %indvars.iv.next.1
  %30 = load float, ptr %29, align 4, !tbaa !12
  %31 = getelementptr inbounds %"struct.juce::FFT::Complex", ptr %1, i64 %indvars.iv.next.1
  store float %30, ptr %31, align 4, !tbaa !14
  %32 = getelementptr inbounds i8, ptr %31, i64 4
  store float 0.000000e+00, ptr %32, align 4, !tbaa !16
  %indvars.iv.next.2 = add nuw nsw i64 %indvars.iv, 3
  %33 = getelementptr inbounds float, ptr %2, i64 %indvars.iv.next.2
  %34 = load float, ptr %33, align 4, !tbaa !12
  %35 = getelementptr inbounds %"struct.juce::FFT::Complex", ptr %1, i64 %indvars.iv.next.2
  store float %34, ptr %35, align 4, !tbaa !14
  %36 = getelementptr inbounds i8, ptr %35, i64 4
  store float 0.000000e+00, ptr %36, align 4, !tbaa !16
  %indvars.iv.next.3 = add nuw nsw i64 %indvars.iv, 4
  %exitcond.not.3 = icmp eq i64 %indvars.iv.next.3, %wide.trip.count
  br i1 %exitcond.not.3, label %._crit_edge, label %.lr.ph, !llvm.loop !26
}

attributes #0 = { 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 = { 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, !11, i64 8}
!6 = !{!"_ZTSN4juce3FFTE", !7, i64 0, !11, i64 8}
!7 = !{!"_ZTSN4juce13ScopedPointerINS_3FFT9FFTConfigEEE", !8, i64 0}
!8 = !{!"any pointer", !9, i64 0}
!9 = !{!"omnipotent char", !10, i64 0}
!10 = !{!"Simple C++ TBAA"}
!11 = !{!"int", !9, i64 0}
!12 = !{!13, !13, i64 0}
!13 = !{!"float", !9, i64 0}
!14 = !{!15, !13, i64 0}
!15 = !{!"_ZTSN4juce3FFT7ComplexE", !13, i64 0, !13, i64 4}
!16 = !{!15, !13, i64 4}
!17 = distinct !{!17, !18}
!18 = !{!"llvm.loop.unroll.disable"}
!19 = !{!20}
!20 = distinct !{!20, !21}
!21 = distinct !{!21, !"LVerDomain"}
!22 = distinct !{!22, !23, !24, !25}
!23 = !{!"llvm.loop.mustprogress"}
!24 = !{!"llvm.loop.isvectorized", i32 1}
!25 = !{!"llvm.loop.unroll.runtime.disable"}
!26 = distinct !{!26, !23, !24}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,SROAPass,SimplifyCFGPass,TailCallElimPass