; LLVM IR from jgaeddert/liquid-dsp :: src/equalization/src (equalizer_rrrf)

; 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.eqlms_rrrf_s = type { i32, float, ptr, ptr, ptr, i32, i32, ptr, ptr, 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: nounwind uwtable
define dso_local i32 @eqlms_rrrf_copy_coefficients(ptr noundef %0, ptr noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  store i32 0, ptr %5, align 4, !tbaa !9
  br label %6

6:                                                ; preds = %31, %2
  %7 = load i32, ptr %5, align 4, !tbaa !9
  %8 = load ptr, ptr %3, align 8, !tbaa !5
  %9 = getelementptr inbounds %struct.eqlms_rrrf_s, ptr %8, i32 0, i32 0
  %10 = load i32, ptr %9, align 8, !tbaa !11
  %11 = icmp ult i32 %7, %10
  br i1 %11, label %12, label %34

12:                                               ; preds = %6
  %13 = load ptr, ptr %3, align 8, !tbaa !5
  %14 = getelementptr inbounds %struct.eqlms_rrrf_s, ptr %13, i32 0, i32 3
  %15 = load ptr, ptr %14, align 8, !tbaa !14
  %16 = load ptr, ptr %3, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.eqlms_rrrf_s, ptr %16, i32 0, i32 0
  %18 = load i32, ptr %17, align 8, !tbaa !11
  %19 = load i32, ptr %5, align 4, !tbaa !9
  %20 = sub i32 %18, %19
  %21 = sub i32 %20, 1
  %22 = zext i32 %21 to i64
  %23 = getelementptr inbounds float, ptr %15, i64 %22
  %24 = load float, ptr %23, align 4, !tbaa !15
  %25 = fpext float %24 to double
  %26 = fptrunc double %25 to float
  %27 = load ptr, ptr %4, align 8, !tbaa !5
  %28 = load i32, ptr %5, align 4, !tbaa !9
  %29 = zext i32 %28 to i64
  %30 = getelementptr inbounds float, ptr %27, i64 %29
  store float %26, ptr %30, align 4, !tbaa !15
  br label %31

31:                                               ; preds = %12
  %32 = load i32, ptr %5, align 4, !tbaa !9
  %33 = add i32 %32, 1
  store i32 %33, ptr %5, align 4, !tbaa !9
  br label %6, !llvm.loop !16

34:                                               ; preds = %6
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  ret i32 0
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 0}
!12 = !{!"eqlms_rrrf_s", !10, i64 0, !13, i64 4, !6, i64 8, !6, i64 16, !6, i64 24, !10, i64 32, !10, i64 36, !6, i64 40, !6, i64 48, !13, i64 56}
!13 = !{!"float", !7, i64 0}
!14 = !{!12, !6, i64 16}
!15 = !{!13, !13, 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: nofree norecurse nosync nounwind memory(read, argmem: readwrite, inaccessiblemem: none) uwtable
define dso_local noundef i32 @eqlms_rrrf_copy_coefficients(ptr nocapture noundef readonly %0, ptr nocapture noundef writeonly %1) local_unnamed_addr #0 {
  %3 = load i32, ptr %0, align 8, !tbaa !5
  %.not = icmp eq i32 %3, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2
  %4 = getelementptr inbounds i8, ptr %0, i64 16
  %5 = load ptr, ptr %4, align 8, !tbaa !12
  %wide.trip.count = zext i32 %3 to i64
  %min.iters.check = icmp ult i32 %3, 32
  br i1 %min.iters.check, label %scalar.ph.preheader, label %vector.scevcheck

vector.scevcheck:                                 ; preds = %.lr.ph
  %6 = add nsw i64 %wide.trip.count, -1
  %7 = add i32 %3, -1
  %8 = trunc i64 %6 to i32
  %9 = icmp ult i32 %7, %8
  %10 = icmp ugt i64 %6, 4294967295
  %11 = or i1 %9, %10
  br i1 %11, label %scalar.ph.preheader, label %vector.memcheck

vector.memcheck:                                  ; preds = %vector.scevcheck
  %12 = shl nuw nsw i64 %wide.trip.count, 2
  %scevgep = getelementptr i8, ptr %1, i64 %12
  %13 = add i32 %3, -1
  %14 = zext i32 %13 to i64
  %15 = shl nuw nsw i64 %14, 2
  %16 = add nuw nsw i64 %15, 4
  %17 = sub nsw i64 %16, %12
  %scevgep10 = getelementptr i8, ptr %5, i64 %17
  %18 = getelementptr i8, ptr %5, i64 %15
  %scevgep11 = getelementptr i8, ptr %18, i64 4
  %bound0 = icmp ugt ptr %scevgep11, %1
  %bound1 = icmp ult ptr %scevgep10, %scevgep
  %found.conflict = and i1 %bound0, %bound1
  br i1 %found.conflict, label %scalar.ph.preheader, label %vector.ph

vector.ph:                                        ; preds = %vector.memcheck
  %n.vec = and i64 %wide.trip.count, 4294967288
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %19 = trunc i64 %index to i32
  %20 = xor i32 %19, -1
  %21 = add i32 %3, %20
  %22 = zext i32 %21 to i64
  %23 = getelementptr inbounds float, ptr %5, i64 %22
  %24 = getelementptr inbounds i8, ptr %23, i64 -12
  %25 = getelementptr inbounds i8, ptr %23, i64 -28
  %wide.load = load <4 x float>, ptr %24, align 4, !tbaa !13, !alias.scope !14
  %reverse = shufflevector <4 x float> %wide.load, <4 x float> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
  %wide.load12 = load <4 x float>, ptr %25, align 4, !tbaa !13, !alias.scope !14
  %reverse13 = shufflevector <4 x float> %wide.load12, <4 x float> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
  %26 = getelementptr inbounds float, ptr %1, i64 %index
  %27 = getelementptr inbounds i8, ptr %26, i64 16
  store <4 x float> %reverse, ptr %26, align 4, !tbaa !13, !alias.scope !17, !noalias !14
  store <4 x float> %reverse13, ptr %27, align 4, !tbaa !13, !alias.scope !17, !noalias !14
  %index.next = add nuw i64 %index, 8
  %28 = icmp eq i64 %index.next, %n.vec
  br i1 %28, label %middle.block, label %vector.body, !llvm.loop !19

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

scalar.ph.preheader:                              ; preds = %middle.block, %vector.memcheck, %vector.scevcheck, %.lr.ph
  %indvars.iv.ph = phi i64 [ 0, %vector.memcheck ], [ 0, %vector.scevcheck ], [ 0, %.lr.ph ], [ %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 %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 ]
  %29 = trunc nuw i64 %indvars.iv.prol to i32
  %30 = xor i32 %29, -1
  %31 = add i32 %3, %30
  %32 = zext i32 %31 to i64
  %33 = getelementptr inbounds float, ptr %5, i64 %32
  %34 = load float, ptr %33, align 4, !tbaa !13
  %35 = getelementptr inbounds float, ptr %1, i64 %indvars.iv.prol
  store float %34, ptr %35, align 4, !tbaa !13
  %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 ]
  %36 = sub nsw i64 %indvars.iv.ph, %wide.trip.count
  %37 = icmp ugt i64 %36, -4
  br i1 %37, 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 ]
  %38 = trunc nuw i64 %indvars.iv to i32
  %39 = xor i32 %38, -1
  %40 = add i32 %3, %39
  %41 = zext i32 %40 to i64
  %42 = getelementptr inbounds float, ptr %5, i64 %41
  %43 = load float, ptr %42, align 4, !tbaa !13
  %44 = getelementptr inbounds float, ptr %1, i64 %indvars.iv
  store float %43, ptr %44, align 4, !tbaa !13
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %45 = trunc nuw i64 %indvars.iv.next to i32
  %46 = xor i32 %45, -1
  %47 = add i32 %3, %46
  %48 = zext i32 %47 to i64
  %49 = getelementptr inbounds float, ptr %5, i64 %48
  %50 = load float, ptr %49, align 4, !tbaa !13
  %51 = getelementptr inbounds float, ptr %1, i64 %indvars.iv.next
  store float %50, ptr %51, align 4, !tbaa !13
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %52 = trunc nuw i64 %indvars.iv.next.1 to i32
  %53 = xor i32 %52, -1
  %54 = add i32 %3, %53
  %55 = zext i32 %54 to i64
  %56 = getelementptr inbounds float, ptr %5, i64 %55
  %57 = load float, ptr %56, align 4, !tbaa !13
  %58 = getelementptr inbounds float, ptr %1, i64 %indvars.iv.next.1
  store float %57, ptr %58, align 4, !tbaa !13
  %indvars.iv.next.2 = add nuw nsw i64 %indvars.iv, 3
  %59 = trunc nuw i64 %indvars.iv.next.2 to i32
  %60 = xor i32 %59, -1
  %61 = add i32 %3, %60
  %62 = zext i32 %61 to i64
  %63 = getelementptr inbounds float, ptr %5, i64 %62
  %64 = load float, ptr %63, align 4, !tbaa !13
  %65 = getelementptr inbounds float, ptr %1, i64 %indvars.iv.next.2
  store float %64, ptr %65, align 4, !tbaa !13
  %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 %scalar.ph, !llvm.loop !25

._crit_edge:                                      ; preds = %scalar.ph.prol.loopexit, %scalar.ph, %middle.block, %2
  ret i32 0
}

attributes #0 = { nofree norecurse nosync nounwind memory(read, argmem: readwrite, inaccessiblemem: none) 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" }

!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, !7, i64 0}
!6 = !{!"eqlms_rrrf_s", !7, i64 0, !10, i64 4, !11, i64 8, !11, i64 16, !11, i64 24, !7, i64 32, !7, i64 36, !11, i64 40, !11, i64 48, !10, i64 56}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"float", !8, i64 0}
!11 = !{!"any pointer", !8, i64 0}
!12 = !{!6, !11, i64 16}
!13 = !{!10, !10, 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,GlobalDCEPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass