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

; 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.RingBuffer = type { i64, i64, i64, i64, i32, ptr }

; Function Attrs: nounwind uwtable
define dso_local i64 @WebRtc_available_read(ptr noundef %0) #0 {
  %2 = alloca i64, align 8
  %3 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  %4 = load ptr, ptr %3, align 8, !tbaa !5
  %5 = icmp ne ptr %4, null
  br i1 %5, label %7, label %6

6:                                                ; preds = %1
  store i64 0, ptr %2, align 8
  br label %32

7:                                                ; preds = %1
  %8 = load ptr, ptr %3, align 8, !tbaa !5
  %9 = getelementptr inbounds %struct.RingBuffer, ptr %8, i32 0, i32 4
  %10 = load i32, ptr %9, align 8, !tbaa !9
  %11 = icmp eq i32 %10, 0
  br i1 %11, label %12, label %20

12:                                               ; preds = %7
  %13 = load ptr, ptr %3, align 8, !tbaa !5
  %14 = getelementptr inbounds %struct.RingBuffer, ptr %13, i32 0, i32 1
  %15 = load i64, ptr %14, align 8, !tbaa !13
  %16 = load ptr, ptr %3, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.RingBuffer, ptr %16, i32 0, i32 0
  %18 = load i64, ptr %17, align 8, !tbaa !14
  %19 = sub i64 %15, %18
  store i64 %19, ptr %2, align 8
  br label %32

20:                                               ; preds = %7
  %21 = load ptr, ptr %3, align 8, !tbaa !5
  %22 = getelementptr inbounds %struct.RingBuffer, ptr %21, i32 0, i32 2
  %23 = load i64, ptr %22, align 8, !tbaa !15
  %24 = load ptr, ptr %3, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct.RingBuffer, ptr %24, i32 0, i32 0
  %26 = load i64, ptr %25, align 8, !tbaa !14
  %27 = sub i64 %23, %26
  %28 = load ptr, ptr %3, align 8, !tbaa !5
  %29 = getelementptr inbounds %struct.RingBuffer, ptr %28, i32 0, i32 1
  %30 = load i64, ptr %29, align 8, !tbaa !13
  %31 = add i64 %27, %30
  store i64 %31, ptr %2, align 8
  br label %32

32:                                               ; preds = %20, %12, %6
  %33 = load i64, ptr %2, align 8
  ret i64 %33
}

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 = !{!6, !6, i64 0}
!6 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !12, i64 32}
!10 = !{!"RingBuffer", !11, i64 0, !11, i64 8, !11, i64 16, !11, i64 24, !12, i64 32, !6, i64 40}
!11 = !{!"long", !7, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = !{!10, !11, i64 8}
!14 = !{!10, !11, i64 0}
!15 = !{!10, !11, i64 16}


; 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: read) uwtable
define dso_local i64 @WebRtc_available_read(ptr noundef readonly %0) local_unnamed_addr #0 {
  %.not = icmp eq ptr %0, null
  br i1 %.not, label %18, label %2

2:                                                ; preds = %1
  %3 = getelementptr inbounds i8, ptr %0, i64 32
  %4 = load i32, ptr %3, align 8, !tbaa !5
  %5 = icmp eq i32 %4, 0
  %6 = load i64, ptr %0, align 8, !tbaa !12
  br i1 %5, label %7, label %11

7:                                                ; preds = %2
  %8 = getelementptr inbounds i8, ptr %0, i64 8
  %9 = load i64, ptr %8, align 8, !tbaa !13
  %10 = sub i64 %9, %6
  br label %18

11:                                               ; preds = %2
  %12 = getelementptr inbounds i8, ptr %0, i64 16
  %13 = load i64, ptr %12, align 8, !tbaa !14
  %14 = sub i64 %13, %6
  %15 = getelementptr inbounds i8, ptr %0, i64 8
  %16 = load i64, ptr %15, align 8, !tbaa !13
  %17 = add i64 %14, %16
  br label %18

18:                                               ; preds = %1, %11, %7
  %.0 = phi i64 [ %10, %7 ], [ %17, %11 ], [ 0, %1 ]
  ret i64 %.0
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) 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, !10, i64 32}
!6 = !{!"RingBuffer", !7, i64 0, !7, i64 8, !7, i64 16, !7, i64 24, !10, i64 32, !11, i64 40}
!7 = !{!"long", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!"any pointer", !8, i64 0}
!12 = !{!6, !7, i64 0}
!13 = !{!6, !7, i64 8}
!14 = !{!6, !7, i64 16}


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