; 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.iirinterp_cccf_s = type { i32, ptr }

; 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
declare dso_local i32 @iirfilt_cccf_execute(ptr noundef, <2 x float> noundef, ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local i32 @iirinterp_cccf_execute(ptr noundef %0, <2 x float> noundef %1, ptr noundef %2) #1 {
  %4 = alloca { float, float }, align 4
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca { float, float }, align 4
  store <2 x float> %1, ptr %4, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store ptr %2, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  store i32 0, ptr %7, align 4, !tbaa !9
  br label %9

9:                                                ; preds = %38, %3
  %10 = load i32, ptr %7, align 4, !tbaa !9
  %11 = load ptr, ptr %5, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.iirinterp_cccf_s, ptr %11, i32 0, i32 0
  %13 = load i32, ptr %12, align 8, !tbaa !11
  %14 = icmp ult i32 %10, %13
  br i1 %14, label %15, label %41

15:                                               ; preds = %9
  %16 = load ptr, ptr %5, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.iirinterp_cccf_s, ptr %16, i32 0, i32 1
  %18 = load ptr, ptr %17, align 8, !tbaa !13
  %19 = load i32, ptr %7, align 4, !tbaa !9
  %20 = icmp eq i32 %19, 0
  br i1 %20, label %21, label %26

21:                                               ; preds = %15
  %22 = getelementptr inbounds { float, float }, ptr %4, i32 0, i32 0
  %23 = load float, ptr %22, align 4
  %24 = getelementptr inbounds { float, float }, ptr %4, i32 0, i32 1
  %25 = load float, ptr %24, align 4
  br label %27

26:                                               ; preds = %15
  br label %27

27:                                               ; preds = %26, %21
  %28 = phi float [ %23, %21 ], [ 0.000000e+00, %26 ]
  %29 = phi float [ %25, %21 ], [ 0.000000e+00, %26 ]
  %30 = load ptr, ptr %6, align 8, !tbaa !5
  %31 = load i32, ptr %7, align 4, !tbaa !9
  %32 = zext i32 %31 to i64
  %33 = getelementptr inbounds { float, float }, ptr %30, i64 %32
  %34 = getelementptr inbounds { float, float }, ptr %8, i32 0, i32 0
  %35 = getelementptr inbounds { float, float }, ptr %8, i32 0, i32 1
  store float %28, ptr %34, align 4
  store float %29, ptr %35, align 4
  %36 = load <2 x float>, ptr %8, align 4
  %37 = call i32 @iirfilt_cccf_execute(ptr noundef %18, <2 x float> noundef %36, ptr noundef %33)
  br label %38

38:                                               ; preds = %27
  %39 = load i32, ptr %7, align 4, !tbaa !9
  %40 = add i32 %39, 1
  store i32 %40, ptr %7, align 4, !tbaa !9
  br label %9, !llvm.loop !14

41:                                               ; preds = %9
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  ret i32 0
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nounwind uwtable "min-legal-vector-width"="64" "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 = !{!"iirinterp_cccf_s", !10, i64 0, !6, i64 8}
!13 = !{!12, !6, i64 8}
!14 = distinct !{!14, !15}
!15 = !{!"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
declare dso_local i32 @iirfilt_cccf_execute(ptr noundef, <2 x float> noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @iirinterp_cccf_execute(ptr nocapture noundef readonly %0, <2 x float> noundef %1, ptr noundef %2) local_unnamed_addr #0 {
  %4 = load i32, ptr %0, align 8, !tbaa !5
  %.not = icmp eq i32 %4, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %3
  %5 = getelementptr inbounds i8, ptr %0, i64 8
  %6 = load ptr, ptr %5, align 8, !tbaa !11
  %7 = tail call i32 @iirfilt_cccf_execute(ptr noundef %6, <2 x float> noundef %1, ptr noundef %2)
  %8 = load i32, ptr %0, align 8, !tbaa !5
  %9 = icmp ugt i32 %8, 1
  br i1 %9, label %.peel.next, label %._crit_edge

.peel.next:                                       ; preds = %.lr.ph, %.peel.next
  %indvars.iv = phi i64 [ %indvars.iv.next, %.peel.next ], [ 1, %.lr.ph ]
  %10 = load ptr, ptr %5, align 8, !tbaa !11
  %11 = getelementptr inbounds { float, float }, ptr %2, i64 %indvars.iv
  %12 = tail call i32 @iirfilt_cccf_execute(ptr noundef %10, <2 x float> noundef zeroinitializer, ptr noundef nonnull %11)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %13 = load i32, ptr %0, align 8, !tbaa !5
  %14 = zext i32 %13 to i64
  %15 = icmp ult i64 %indvars.iv.next, %14
  br i1 %15, label %.peel.next, label %._crit_edge, !llvm.loop !12

._crit_edge:                                      ; preds = %.peel.next, %.lr.ph, %3
  ret i32 0
}

attributes #0 = { nounwind uwtable "min-legal-vector-width"="64" "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 = !{!"iirinterp_cccf_s", !7, i64 0, !10, i64 8}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !10, i64 8}
!12 = distinct !{!12, !13, !14}
!13 = !{!"llvm.loop.mustprogress"}
!14 = !{!"llvm.loop.peeled.count", i32 1}


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