; LLVM IR from jgaeddert/liquid-dsp :: src/fec/src (packetizer)

; 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: nounwind uwtable
declare dso_local i32 @packetizer_compute_enc_msg_len(i32 noundef, i32 noundef, i32 noundef, i32 noundef) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nounwind uwtable
define dso_local i32 @packetizer_compute_dec_msg_len(i32 noundef %0, i32 noundef %1, i32 noundef %2, i32 noundef %3) #0 {
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  %12 = alloca i32, align 4
  store i32 %0, ptr %6, align 4, !tbaa !5
  store i32 %1, ptr %7, align 4, !tbaa !5
  store i32 %2, ptr %8, align 4, !tbaa !5
  store i32 %3, ptr %9, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #2
  store i32 0, ptr %10, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #2
  store i32 0, ptr %11, align 4, !tbaa !5
  br label %13

13:                                               ; preds = %38, %4
  %14 = load i32, ptr %11, align 4, !tbaa !5
  %15 = load i32, ptr %6, align 4, !tbaa !5
  %16 = icmp ult i32 %14, %15
  br i1 %16, label %17, label %39

17:                                               ; preds = %13
  %18 = load i32, ptr %10, align 4, !tbaa !5
  %19 = load i32, ptr %7, align 4, !tbaa !5
  %20 = load i32, ptr %8, align 4, !tbaa !5
  %21 = load i32, ptr %9, align 4, !tbaa !5
  %22 = call i32 @packetizer_compute_enc_msg_len(i32 noundef %18, i32 noundef %19, i32 noundef %20, i32 noundef %21)
  store i32 %22, ptr %11, align 4, !tbaa !5
  %23 = load i32, ptr %11, align 4, !tbaa !5
  %24 = load i32, ptr %6, align 4, !tbaa !5
  %25 = icmp eq i32 %23, %24
  br i1 %25, label %26, label %28

26:                                               ; preds = %17
  %27 = load i32, ptr %10, align 4, !tbaa !5
  store i32 %27, ptr %5, align 4
  store i32 1, ptr %12, align 4
  br label %40

28:                                               ; preds = %17
  %29 = load i32, ptr %11, align 4, !tbaa !5
  %30 = load i32, ptr %6, align 4, !tbaa !5
  %31 = icmp ugt i32 %29, %30
  br i1 %31, label %32, label %34

32:                                               ; preds = %28
  %33 = load i32, ptr %10, align 4, !tbaa !5
  store i32 %33, ptr %5, align 4
  store i32 1, ptr %12, align 4
  br label %40

34:                                               ; preds = %28
  %35 = load i32, ptr %10, align 4, !tbaa !5
  %36 = add i32 %35, 1
  store i32 %36, ptr %10, align 4, !tbaa !5
  br label %37

37:                                               ; preds = %34
  br label %38

38:                                               ; preds = %37
  br label %13, !llvm.loop !9

39:                                               ; preds = %13
  store i32 0, ptr %5, align 4
  store i32 1, ptr %12, align 4
  br label %40

40:                                               ; preds = %39, %32, %26
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #2
  %41 = load i32, ptr %5, align 4
  ret i32 %41
}

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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"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 @packetizer_compute_enc_msg_len(i32 noundef, i32 noundef, i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @packetizer_compute_dec_msg_len(i32 noundef %0, i32 noundef %1, i32 noundef %2, i32 noundef %3) local_unnamed_addr #0 {
  %.not = icmp eq i32 %0, 0
  br i1 %.not, label %._crit_edge19, label %.lr.ph

.lr.ph:                                           ; preds = %4, %.lr.ph
  %.01418 = phi i32 [ %6, %.lr.ph ], [ 0, %4 ]
  %5 = tail call i32 @packetizer_compute_enc_msg_len(i32 noundef %.01418, i32 noundef %1, i32 noundef %2, i32 noundef %3)
  %or.cond.not = icmp ult i32 %5, %0
  %6 = add i32 %.01418, 1
  br i1 %or.cond.not, label %.lr.ph, label %._crit_edge19, !llvm.loop !5

._crit_edge19:                                    ; preds = %.lr.ph, %4
  %.015 = phi i32 [ 0, %4 ], [ %.01418, %.lr.ph ]
  ret i32 %.015
}

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" }

!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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass