; LLVM IR from Ryuk17/SpeechAlgorithms :: WebRTC_AEC/src (delay_estimator)

; 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: 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 void @WebRtc_MeanEstimatorFix(i32 noundef %0, i32 noundef %1, ptr noundef %2) #1 {
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  store ptr %2, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  %8 = load i32, ptr %4, align 4, !tbaa !5
  %9 = load ptr, ptr %6, align 8, !tbaa !9
  %10 = load i32, ptr %9, align 4, !tbaa !5
  %11 = sub nsw i32 %8, %10
  store i32 %11, ptr %7, align 4, !tbaa !5
  %12 = load i32, ptr %7, align 4, !tbaa !5
  %13 = icmp slt i32 %12, 0
  br i1 %13, label %14, label %20

14:                                               ; preds = %3
  %15 = load i32, ptr %7, align 4, !tbaa !5
  %16 = sub nsw i32 0, %15
  %17 = load i32, ptr %5, align 4, !tbaa !5
  %18 = ashr i32 %16, %17
  %19 = sub nsw i32 0, %18
  store i32 %19, ptr %7, align 4, !tbaa !5
  br label %24

20:                                               ; preds = %3
  %21 = load i32, ptr %7, align 4, !tbaa !5
  %22 = load i32, ptr %5, align 4, !tbaa !5
  %23 = ashr i32 %21, %22
  store i32 %23, ptr %7, align 4, !tbaa !5
  br label %24

24:                                               ; preds = %20, %14
  %25 = load i32, ptr %7, align 4, !tbaa !5
  %26 = load ptr, ptr %6, align 8, !tbaa !9
  %27 = load i32, ptr %26, align 4, !tbaa !5
  %28 = add nsw i32 %27, %25
  store i32 %28, ptr %26, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  ret void
}

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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}


; 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 nofree norecurse nosync nounwind willreturn memory(argmem: readwrite) uwtable
define dso_local void @WebRtc_MeanEstimatorFix(i32 noundef %0, i32 noundef %1, ptr nocapture noundef %2) local_unnamed_addr #0 {
  %4 = load i32, ptr %2, align 4, !tbaa !5
  %5 = sub nsw i32 %0, %4
  %6 = icmp slt i32 %5, 0
  %7 = sub nsw i32 0, %5
  %8 = lshr i32 %7, %1
  %9 = sub nsw i32 0, %8
  %10 = lshr i32 %5, %1
  %.0 = select i1 %6, i32 %9, i32 %10
  %11 = add nsw i32 %.0, %4
  store i32 %11, ptr %2, align 4, !tbaa !5
  ret void
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: readwrite) 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, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass