; LLVM IR from jgaeddert/liquid-dsp :: src/filter/src (filter_cccf)

; 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.firfilt_cccf_s = type { ptr, i32, ptr, ptr, { 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: nocallback nofree nosync nounwind willreturn
declare ptr @llvm.stacksave.p0() #1

; Function Attrs: nocallback nofree nosync nounwind willreturn
declare void @llvm.stackrestore.p0(ptr) #1

; Function Attrs: nounwind uwtable
define dso_local float @firfilt_cccf_groupdelay(ptr noundef %0, float noundef %1) #2 {
  %3 = alloca ptr, align 8
  %4 = alloca float, align 4
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca i32, 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, !tbaa !5
  %9 = getelementptr inbounds %struct.firfilt_cccf_s, ptr %8, i32 0, i32 1
  %10 = load i32, ptr %9, align 8, !tbaa !11
  %11 = zext i32 %10 to i64
  %12 = call ptr @llvm.stacksave.p0()
  store ptr %12, ptr %5, align 8
  %13 = alloca float, i64 %11, align 16
  store i64 %11, ptr %6, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #4
  store i32 0, ptr %7, align 4, !tbaa !14
  br label %14

14:                                               ; preds = %34, %2
  %15 = load i32, ptr %7, align 4, !tbaa !14
  %16 = load ptr, ptr %3, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.firfilt_cccf_s, ptr %16, i32 0, i32 1
  %18 = load i32, ptr %17, align 8, !tbaa !11
  %19 = icmp ult i32 %15, %18
  br i1 %19, label %20, label %37

20:                                               ; preds = %14
  %21 = load ptr, ptr %3, align 8, !tbaa !5
  %22 = getelementptr inbounds %struct.firfilt_cccf_s, ptr %21, i32 0, i32 0
  %23 = load ptr, ptr %22, align 8, !tbaa !15
  %24 = load i32, ptr %7, align 4, !tbaa !14
  %25 = zext i32 %24 to i64
  %26 = getelementptr inbounds { float, float }, ptr %23, i64 %25
  %27 = getelementptr inbounds { float, float }, ptr %26, i32 0, i32 0
  %28 = load float, ptr %27, align 4
  %29 = getelementptr inbounds { float, float }, ptr %26, i32 0, i32 1
  %30 = load float, ptr %29, align 4
  %31 = load i32, ptr %7, align 4, !tbaa !14
  %32 = zext i32 %31 to i64
  %33 = getelementptr inbounds float, ptr %13, i64 %32
  store float %28, ptr %33, align 4, !tbaa !9
  br label %34

34:                                               ; preds = %20
  %35 = load i32, ptr %7, align 4, !tbaa !14
  %36 = add i32 %35, 1
  store i32 %36, ptr %7, align 4, !tbaa !14
  br label %14, !llvm.loop !16

37:                                               ; preds = %14
  %38 = load ptr, ptr %3, align 8, !tbaa !5
  %39 = getelementptr inbounds %struct.firfilt_cccf_s, ptr %38, i32 0, i32 1
  %40 = load i32, ptr %39, align 8, !tbaa !11
  %41 = load float, ptr %4, align 4, !tbaa !9
  %42 = call float @fir_group_delay(ptr noundef %13, i32 noundef %40, float noundef %41)
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #4
  %43 = load ptr, ptr %5, align 8
  call void @llvm.stackrestore.p0(ptr %43)
  ret float %42
}

declare float @fir_group_delay(ptr noundef, i32 noundef, float noundef) #3

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nocallback nofree nosync nounwind willreturn }
attributes #2 = { 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 = { "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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"float", !7, i64 0}
!11 = !{!12, !13, i64 8}
!12 = !{!"firfilt_cccf_s", !6, i64 0, !13, i64 8, !6, i64 16, !6, i64 24, !7, i64 32}
!13 = !{!"int", !7, i64 0}
!14 = !{!13, !13, i64 0}
!15 = !{!12, !6, i64 0}
!16 = distinct !{!16, !17}
!17 = !{!"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: nounwind uwtable
define dso_local float @firfilt_cccf_groupdelay(ptr nocapture noundef readonly %0, float noundef %1) local_unnamed_addr #0 {
  %3 = getelementptr inbounds i8, ptr %0, i64 8
  %4 = load i32, ptr %3, align 8, !tbaa !5
  %5 = zext i32 %4 to i64
  %6 = alloca float, i64 %5, align 16
  %.not = icmp eq i32 %4, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2
  %7 = load ptr, ptr %0, align 8, !tbaa !11
  %min.iters.check = icmp ult i32 %4, 17
  br i1 %min.iters.check, label %scalar.ph.preheader, label %vector.memcheck

vector.memcheck:                                  ; preds = %.lr.ph
  %8 = shl nuw nsw i64 %5, 2
  %scevgep = getelementptr i8, ptr %6, i64 %8
  %9 = shl nuw nsw i64 %5, 3
  %10 = getelementptr i8, ptr %7, i64 %9
  %scevgep12 = getelementptr i8, ptr %10, i64 -4
  %bound0 = icmp ult ptr %6, %scevgep12
  %bound1 = icmp ult ptr %7, %scevgep
  %found.conflict = and i1 %bound0, %bound1
  br i1 %found.conflict, label %scalar.ph.preheader, label %vector.ph

vector.ph:                                        ; preds = %vector.memcheck
  %n.mod.vf = and i64 %5, 7
  %11 = icmp eq i64 %n.mod.vf, 0
  %12 = select i1 %11, i64 8, i64 %n.mod.vf
  %n.vec = sub nsw i64 %5, %12
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %13 = or disjoint i64 %index, 4
  %14 = getelementptr inbounds { float, float }, ptr %7, i64 %index
  %15 = getelementptr inbounds { float, float }, ptr %7, i64 %13
  %wide.vec = load <8 x float>, ptr %14, align 4
  %wide.vec13 = load <8 x float>, ptr %15, align 4
  %strided.vec = shufflevector <8 x float> %wide.vec, <8 x float> poison, <4 x i32> <i32 0, i32 2, i32 4, i32 6>
  %strided.vec14 = shufflevector <8 x float> %wide.vec13, <8 x float> poison, <4 x i32> <i32 0, i32 2, i32 4, i32 6>
  %16 = getelementptr inbounds float, ptr %6, i64 %index
  %17 = getelementptr inbounds i8, ptr %16, i64 16
  store <4 x float> %strided.vec, ptr %16, align 16, !tbaa !12, !alias.scope !14, !noalias !17
  store <4 x float> %strided.vec14, ptr %17, align 16, !tbaa !12, !alias.scope !14, !noalias !17
  %index.next = add nuw i64 %index, 8
  %18 = icmp eq i64 %index.next, %n.vec
  br i1 %18, label %scalar.ph.preheader, label %vector.body, !llvm.loop !19

scalar.ph.preheader:                              ; preds = %vector.body, %vector.memcheck, %.lr.ph
  %indvars.iv.ph = phi i64 [ 0, %vector.memcheck ], [ 0, %.lr.ph ], [ %n.vec, %vector.body ]
  %19 = sub nsw i64 %5, %indvars.iv.ph
  %xtraiter = and i64 %19, 3
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %scalar.ph.prol.loopexit, label %scalar.ph.prol

scalar.ph.prol:                                   ; preds = %scalar.ph.preheader, %scalar.ph.prol
  %indvars.iv.prol = phi i64 [ %indvars.iv.next.prol, %scalar.ph.prol ], [ %indvars.iv.ph, %scalar.ph.preheader ]
  %prol.iter = phi i64 [ %prol.iter.next, %scalar.ph.prol ], [ 0, %scalar.ph.preheader ]
  %20 = getelementptr inbounds { float, float }, ptr %7, i64 %indvars.iv.prol
  %21 = load float, ptr %20, align 4
  %22 = getelementptr inbounds float, ptr %6, i64 %indvars.iv.prol
  store float %21, ptr %22, align 4, !tbaa !12
  %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 %scalar.ph.prol.loopexit, label %scalar.ph.prol, !llvm.loop !23

scalar.ph.prol.loopexit:                          ; preds = %scalar.ph.prol, %scalar.ph.preheader
  %indvars.iv.unr = phi i64 [ %indvars.iv.ph, %scalar.ph.preheader ], [ %indvars.iv.next.prol, %scalar.ph.prol ]
  %23 = sub nsw i64 %indvars.iv.ph, %5
  %24 = icmp ugt i64 %23, -4
  br i1 %24, label %._crit_edge, label %scalar.ph

scalar.ph:                                        ; preds = %scalar.ph.prol.loopexit, %scalar.ph
  %indvars.iv = phi i64 [ %indvars.iv.next.3, %scalar.ph ], [ %indvars.iv.unr, %scalar.ph.prol.loopexit ]
  %25 = getelementptr inbounds { float, float }, ptr %7, i64 %indvars.iv
  %26 = load float, ptr %25, align 4
  %27 = getelementptr inbounds float, ptr %6, i64 %indvars.iv
  store float %26, ptr %27, align 4, !tbaa !12
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %28 = getelementptr inbounds { float, float }, ptr %7, i64 %indvars.iv.next
  %29 = load float, ptr %28, align 4
  %30 = getelementptr inbounds float, ptr %6, i64 %indvars.iv.next
  store float %29, ptr %30, align 4, !tbaa !12
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %31 = getelementptr inbounds { float, float }, ptr %7, i64 %indvars.iv.next.1
  %32 = load float, ptr %31, align 4
  %33 = getelementptr inbounds float, ptr %6, i64 %indvars.iv.next.1
  store float %32, ptr %33, align 4, !tbaa !12
  %indvars.iv.next.2 = add nuw nsw i64 %indvars.iv, 3
  %34 = getelementptr inbounds { float, float }, ptr %7, i64 %indvars.iv.next.2
  %35 = load float, ptr %34, align 4
  %36 = getelementptr inbounds float, ptr %6, i64 %indvars.iv.next.2
  store float %35, ptr %36, align 4, !tbaa !12
  %indvars.iv.next.3 = add nuw nsw i64 %indvars.iv, 4
  %exitcond.not.3 = icmp eq i64 %indvars.iv.next.3, %5
  br i1 %exitcond.not.3, label %._crit_edge, label %scalar.ph, !llvm.loop !25

._crit_edge:                                      ; preds = %scalar.ph.prol.loopexit, %scalar.ph, %2
  %37 = call float @fir_group_delay(ptr noundef nonnull %6, i32 noundef %4, float noundef %1) #2
  ret float %37
}

declare float @fir_group_delay(ptr noundef, i32 noundef, float noundef) local_unnamed_addr #1

attributes #0 = { 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 = { "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, !10, i64 8}
!6 = !{!"firfilt_cccf_s", !7, i64 0, !10, i64 8, !7, i64 16, !7, i64 24, !8, i64 32}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!6, !7, i64 0}
!12 = !{!13, !13, i64 0}
!13 = !{!"float", !8, i64 0}
!14 = !{!15}
!15 = distinct !{!15, !16}
!16 = distinct !{!16, !"LVerDomain"}
!17 = !{!18}
!18 = distinct !{!18, !16}
!19 = distinct !{!19, !20, !21, !22}
!20 = !{!"llvm.loop.mustprogress"}
!21 = !{!"llvm.loop.isvectorized", i32 1}
!22 = !{!"llvm.loop.unroll.runtime.disable"}
!23 = distinct !{!23, !24}
!24 = !{!"llvm.loop.unroll.disable"}
!25 = distinct !{!25, !20, !21}


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