; LLVM IR from Squishy47/Schroeder-All-Pass-Filter :: CircularBuffer.ll (ZN14CircularBuffer10readLinearEf)

; 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"

; 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 speculatable willreturn memory(none)
declare double @llvm.floor.f64(double) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef float @_ZN14CircularBuffer9getSampleEf(ptr noundef nonnull align 8 dereferenceable(36), float noundef) #2 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: mustprogress uwtable
define dso_local noundef float @_ZN14CircularBuffer10readLinearEf(ptr noundef nonnull align 8 dereferenceable(36) %0, float noundef %1) #3 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca float, align 4
  %5 = alloca float, align 4
  %6 = alloca float, align 4
  %7 = alloca float, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store float %1, ptr %4, align 4, !tbaa !9
  %8 = load ptr, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #4
  %9 = load float, ptr %4, align 4, !tbaa !9
  %10 = fpext float %9 to double
  %11 = call double @llvm.floor.f64(double %10)
  %12 = fadd double %11, 1.000000e+00
  %13 = fptrunc double %12 to float
  store float %13, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #4
  %14 = load float, ptr %4, align 4, !tbaa !9
  %15 = fpext float %14 to double
  %16 = call double @llvm.floor.f64(double %15)
  %17 = fptrunc double %16 to float
  store float %17, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #4
  %18 = load float, ptr %4, align 4, !tbaa !9
  %19 = load float, ptr %6, align 4, !tbaa !9
  %20 = fsub float %18, %19
  store float %20, ptr %7, align 4, !tbaa !9
  %21 = load float, ptr %5, align 4, !tbaa !9
  %22 = call noundef float @_ZN14CircularBuffer9getSampleEf(ptr noundef nonnull align 8 dereferenceable(36) %8, float noundef %21)
  %23 = load float, ptr %7, align 4, !tbaa !9
  %24 = fmul float %22, %23
  %25 = fpext float %24 to double
  %26 = load float, ptr %7, align 4, !tbaa !9
  %27 = fpext float %26 to double
  %28 = fsub double 1.000000e+00, %27
  %29 = load float, ptr %6, align 4, !tbaa !9
  %30 = call noundef float @_ZN14CircularBuffer9getSampleEf(ptr noundef nonnull align 8 dereferenceable(36) %8, float noundef %29)
  %31 = fpext float %30 to double
  %32 = call double @llvm.fmuladd.f64(double %28, double %31, double %25)
  %33 = fptrunc double %32 to float
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #4
  ret float %33
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare double @llvm.fmuladd.f64(double, double, double) #1

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
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 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 = !{!"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}


; 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 float @_ZN14CircularBuffer9getSampleEf(ptr noundef nonnull align 8 dereferenceable(36), float noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef float @_ZN14CircularBuffer10readLinearEf(ptr noundef nonnull align 8 dereferenceable(36) %0, float noundef %1) local_unnamed_addr #0 align 2 {
  %3 = tail call float @llvm.floor.f32(float %1)
  %4 = fadd float %3, 1.000000e+00
  %5 = fsub float %1, %3
  %6 = tail call noundef float @_ZN14CircularBuffer9getSampleEf(ptr noundef nonnull align 8 dereferenceable(36) %0, float noundef %4)
  %7 = fmul float %5, %6
  %8 = fpext float %7 to double
  %9 = fpext float %5 to double
  %10 = fsub double 1.000000e+00, %9
  %11 = tail call noundef float @_ZN14CircularBuffer9getSampleEf(ptr noundef nonnull align 8 dereferenceable(36) %0, float noundef %3)
  %12 = fpext float %11 to double
  %13 = tail call double @llvm.fmuladd.f64(double %10, double %12, double %8)
  %14 = fptrunc double %13 to float
  ret float %14
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare double @llvm.fmuladd.f64(double, double, double) #1

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare float @llvm.floor.f32(float) #2

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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }

!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,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,TailCallElimPass