; 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.iirdecim_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
define dso_local i32 @iirdecim_cccf_execute(ptr noundef %0, ptr noundef %1, ptr noundef %2) #1 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca { float, float }, align 4
  %8 = alloca i32, align 4
  %9 = alloca { float, float }, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  store ptr %2, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  store i32 0, ptr %8, align 4, !tbaa !9
  br label %10

10:                                               ; preds = %43, %3
  %11 = load i32, ptr %8, align 4, !tbaa !9
  %12 = load ptr, ptr %4, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct.iirdecim_cccf_s, ptr %12, i32 0, i32 0
  %14 = load i32, ptr %13, align 8, !tbaa !11
  %15 = icmp ult i32 %11, %14
  br i1 %15, label %16, label %46

16:                                               ; preds = %10
  %17 = load ptr, ptr %4, align 8, !tbaa !5
  %18 = getelementptr inbounds %struct.iirdecim_cccf_s, ptr %17, i32 0, i32 1
  %19 = load ptr, ptr %18, align 8, !tbaa !13
  %20 = load ptr, ptr %5, align 8, !tbaa !5
  %21 = load i32, ptr %8, align 4, !tbaa !9
  %22 = zext i32 %21 to i64
  %23 = getelementptr inbounds { float, float }, ptr %20, i64 %22
  %24 = getelementptr inbounds { float, float }, ptr %23, i32 0, i32 0
  %25 = load float, ptr %24, align 4
  %26 = getelementptr inbounds { float, float }, ptr %23, i32 0, i32 1
  %27 = load float, ptr %26, align 4
  %28 = getelementptr inbounds { float, float }, ptr %9, i32 0, i32 0
  %29 = getelementptr inbounds { float, float }, ptr %9, i32 0, i32 1
  store float %25, ptr %28, align 4
  store float %27, ptr %29, align 4
  %30 = load <2 x float>, ptr %9, align 4
  %31 = call i32 @iirfilt_cccf_execute(ptr noundef %19, <2 x float> noundef %30, ptr noundef %7)
  %32 = load i32, ptr %8, align 4, !tbaa !9
  %33 = icmp eq i32 %32, 0
  br i1 %33, label %34, label %42

34:                                               ; preds = %16
  %35 = getelementptr inbounds { float, float }, ptr %7, i32 0, i32 0
  %36 = load float, ptr %35, align 4
  %37 = getelementptr inbounds { float, float }, ptr %7, i32 0, i32 1
  %38 = load float, ptr %37, align 4
  %39 = load ptr, ptr %6, align 8, !tbaa !5
  %40 = getelementptr inbounds { float, float }, ptr %39, i32 0, i32 0
  %41 = getelementptr inbounds { float, float }, ptr %39, i32 0, i32 1
  store float %36, ptr %40, align 4
  store float %38, ptr %41, align 4
  br label %42

42:                                               ; preds = %34, %16
  br label %43

43:                                               ; preds = %42
  %44 = load i32, ptr %8, align 4, !tbaa !9
  %45 = add i32 %44, 1
  store i32 %45, ptr %8, align 4, !tbaa !9
  br label %10, !llvm.loop !14

46:                                               ; preds = %10
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  ret i32 0
}

; Function Attrs: nounwind uwtable
declare dso_local i32 @iirfilt_cccf_execute(ptr noundef, <2 x float> noundef, ptr noundef) #1

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 = !{!"iirdecim_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: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress 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 noundef i32 @iirdecim_cccf_execute(ptr nocapture noundef readonly %0, ptr nocapture noundef readonly %1, ptr nocapture noundef writeonly %2) local_unnamed_addr #1 {
  %4 = alloca { float, float }, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #2
  %5 = load i32, ptr %0, align 8, !tbaa !5
  %.not = icmp eq i32 %5, 0
  br i1 %.not, label %._crit_edge, label %6

6:                                                ; preds = %3
  %7 = getelementptr inbounds i8, ptr %0, i64 8
  %8 = load ptr, ptr %7, align 8, !tbaa !11
  %9 = load <2 x float>, ptr %1, align 4
  %10 = call i32 @iirfilt_cccf_execute(ptr noundef %8, <2 x float> noundef %9, ptr noundef nonnull %4)
  %11 = load <2 x float>, ptr %4, align 8
  store <2 x float> %11, ptr %2, align 4
  %12 = load i32, ptr %0, align 8, !tbaa !5
  %13 = icmp ugt i32 %12, 1
  br i1 %13, label %.peel.next, label %._crit_edge

.peel.next:                                       ; preds = %6, %.peel.next
  %indvars.iv = phi i64 [ %indvars.iv.next, %.peel.next ], [ 1, %6 ]
  %14 = load ptr, ptr %7, align 8, !tbaa !11
  %15 = getelementptr inbounds { float, float }, ptr %1, i64 %indvars.iv
  %16 = load <2 x float>, ptr %15, align 4
  %17 = call i32 @iirfilt_cccf_execute(ptr noundef %14, <2 x float> noundef %16, ptr noundef nonnull %4)
  %.pre = load i32, ptr %0, align 8, !tbaa !5
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %18 = zext i32 %.pre to i64
  %19 = icmp ult i64 %indvars.iv.next, %18
  br i1 %19, label %.peel.next, label %._crit_edge, !llvm.loop !12

._crit_edge:                                      ; preds = %.peel.next, %6, %3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #2
  ret i32 0
}

; Function Attrs: nounwind uwtable
declare dso_local i32 @iirfilt_cccf_execute(ptr noundef, <2 x float> noundef, ptr noundef) local_unnamed_addr #1

attributes #0 = { mustprogress 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, !7, i64 0}
!6 = !{!"iirdecim_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: BDCEPass,CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopFullUnrollPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SCCPPass,SLPVectorizerPass,SROAPass,SimplifyCFGPass