; LLVM IR from sp-nitech/SPTK :: third_party/REAPER/epoch_tracker (lpc_analyzer)

; 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.sptk::reaper::LpcAnalyzer" = type { %"class.std::vector", %"class.std::vector" }
%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<float, std::allocator<float>>::_Vector_impl" }
%"struct.std::_Vector_base<float, std::allocator<float>>::_Vector_impl" = type { %"struct.std::_Vector_base<float, std::allocator<float>>::_Vector_impl_data" }
%"struct.std::_Vector_base<float, std::allocator<float>>::_Vector_impl_data" = type { ptr, ptr, ptr }

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIfSaIfEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #1 align 2

; 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 nosync nounwind speculatable willreturn memory(none)
declare float @llvm.fmuladd.f32(float, float, float) #2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN4sptk6reaper11LpcAnalyzer9GetWindowEi(ptr noundef nonnull align 8 dereferenceable(48), i32 noundef) #3 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef float @_ZSt4sqrtf(float noundef) #4

; Function Attrs: mustprogress uwtable
define dso_local noundef float @_ZN4sptk6reaper11LpcAnalyzer11WindowedRmsEPfi(ptr noundef nonnull align 8 dereferenceable(48) %0, ptr noundef %1, i32 noundef %2) #3 align 2 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca float, align 4
  %8 = alloca float, align 4
  %9 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  store i32 %2, ptr %6, align 4, !tbaa !9
  %10 = load ptr, ptr %4, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #5
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #5
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #5
  %11 = load i32, ptr %6, align 4, !tbaa !9
  call void @_ZN4sptk6reaper11LpcAnalyzer9GetWindowEi(ptr noundef nonnull align 8 dereferenceable(48) %10, i32 noundef %11)
  store i32 0, ptr %9, align 4, !tbaa !9
  store float 0.000000e+00, ptr %7, align 4, !tbaa !11
  br label %12

12:                                               ; preds = %30, %3
  %13 = load i32, ptr %9, align 4, !tbaa !9
  %14 = load i32, ptr %6, align 4, !tbaa !9
  %15 = icmp slt i32 %13, %14
  br i1 %15, label %16, label %33

16:                                               ; preds = %12
  %17 = getelementptr inbounds %"class.sptk::reaper::LpcAnalyzer", ptr %10, i32 0, i32 0
  %18 = load i32, ptr %9, align 4, !tbaa !9
  %19 = sext i32 %18 to i64
  %20 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIfSaIfEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %17, i64 noundef %19) #5
  %21 = load float, ptr %20, align 4, !tbaa !11
  %22 = load ptr, ptr %5, align 8, !tbaa !5
  %23 = getelementptr inbounds float, ptr %22, i32 1
  store ptr %23, ptr %5, align 8, !tbaa !5
  %24 = load float, ptr %22, align 4, !tbaa !11
  %25 = fmul float %21, %24
  store float %25, ptr %8, align 4, !tbaa !11
  %26 = load float, ptr %8, align 4, !tbaa !11
  %27 = load float, ptr %8, align 4, !tbaa !11
  %28 = load float, ptr %7, align 4, !tbaa !11
  %29 = call float @llvm.fmuladd.f32(float %26, float %27, float %28)
  store float %29, ptr %7, align 4, !tbaa !11
  br label %30

30:                                               ; preds = %16
  %31 = load i32, ptr %9, align 4, !tbaa !9
  %32 = add nsw i32 %31, 1
  store i32 %32, ptr %9, align 4, !tbaa !9
  br label %12, !llvm.loop !13

33:                                               ; preds = %12
  %34 = load float, ptr %7, align 4, !tbaa !11
  %35 = load i32, ptr %6, align 4, !tbaa !9
  %36 = sitofp i32 %35 to float
  %37 = fdiv float %34, %36
  %38 = call noundef float @_ZSt4sqrtf(float noundef %37)
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #5
  ret float %38
}

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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #3 = { 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 #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, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"float", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"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"

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIfSaIfEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare float @llvm.fmuladd.f32(float, float, float) #1

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN4sptk6reaper11LpcAnalyzer9GetWindowEi(ptr noundef nonnull align 8 dereferenceable(48), i32 noundef) local_unnamed_addr #2 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef float @_ZSt4sqrtf(float noundef) local_unnamed_addr #3

; Function Attrs: mustprogress uwtable
define dso_local noundef float @_ZN4sptk6reaper11LpcAnalyzer11WindowedRmsEPfi(ptr noundef nonnull align 8 dereferenceable(48) %0, ptr nocapture noundef readonly %1, i32 noundef %2) local_unnamed_addr #2 align 2 {
  tail call void @_ZN4sptk6reaper11LpcAnalyzer9GetWindowEi(ptr noundef nonnull align 8 dereferenceable(48) %0, i32 noundef %2)
  %4 = icmp sgt i32 %2, 0
  br i1 %4, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %3
  %wide.trip.count = zext nneg i32 %2 to i64
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %indvars.iv = phi i64 [ 0, %.lr.ph.preheader ], [ %indvars.iv.next, %.lr.ph ]
  %.01115 = phi ptr [ %1, %.lr.ph.preheader ], [ %7, %.lr.ph ]
  %.01214 = phi float [ 0.000000e+00, %.lr.ph.preheader ], [ %10, %.lr.ph ]
  %5 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIfSaIfEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %indvars.iv) #4
  %6 = load float, ptr %5, align 4, !tbaa !5
  %7 = getelementptr inbounds i8, ptr %.01115, i64 4
  %8 = load float, ptr %.01115, align 4, !tbaa !5
  %9 = fmul float %6, %8
  %10 = tail call float @llvm.fmuladd.f32(float %9, float %9, float %.01214)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %3
  %.012.lcssa = phi float [ 0.000000e+00, %3 ], [ %10, %.lr.ph ]
  %11 = sitofp i32 %2 to float
  %12 = fdiv float %.012.lcssa, %11
  %13 = tail call noundef float @_ZSt4sqrtf(float noundef %12)
  ret float %13
}

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 = { mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none) }
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 = { 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 = { 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 = !{!"float", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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