; 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 ptr @WebRtc_CreateBuffer(i64 noundef %0, i64 noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  store i64 %0, ptr %4, align 8, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #4
  store ptr null, ptr %6, align 8, !tbaa !9
  %8 = load i64, ptr %4, align 8, !tbaa !5
  %9 = icmp eq i64 %8, 0
  br i1 %9, label %13, label %10

10:                                               ; preds = %2
  %11 = load i64, ptr %5, align 8, !tbaa !5
  %12 = icmp eq i64 %11, 0
  br i1 %12, label %13, label %14

13:                                               ; preds = %10, %2
  store ptr null, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %40

14:                                               ; preds = %10
  %15 = call noalias ptr @malloc(i64 noundef 48) #5
  store ptr %15, ptr %6, align 8, !tbaa !9
  %16 = load ptr, ptr %6, align 8, !tbaa !9
  %17 = icmp ne ptr %16, null
  br i1 %17, label %19, label %18

18:                                               ; preds = %14
  store ptr null, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %40

19:                                               ; preds = %14
  %20 = load i64, ptr %4, align 8, !tbaa !5
  %21 = load i64, ptr %5, align 8, !tbaa !5
  %22 = mul i64 %20, %21
  %23 = call noalias ptr @malloc(i64 noundef %22) #5
  %24 = load ptr, ptr %6, align 8, !tbaa !9
  %25 = getelementptr inbounds %struct.RingBuffer, ptr %24, i32 0, i32 5
  store ptr %23, ptr %25, align 8, !tbaa !11
  %26 = load ptr, ptr %6, align 8, !tbaa !9
  %27 = getelementptr inbounds %struct.RingBuffer, ptr %26, i32 0, i32 5
  %28 = load ptr, ptr %27, align 8, !tbaa !11
  %29 = icmp ne ptr %28, null
  br i1 %29, label %32, label %30

30:                                               ; preds = %19
  %31 = load ptr, ptr %6, align 8, !tbaa !9
  call void @free(ptr noundef %31) #4
  store ptr null, ptr %6, align 8, !tbaa !9
  store ptr null, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %40

32:                                               ; preds = %19
  %33 = load i64, ptr %4, align 8, !tbaa !5
  %34 = load ptr, ptr %6, align 8, !tbaa !9
  %35 = getelementptr inbounds %struct.RingBuffer, ptr %34, i32 0, i32 2
  store i64 %33, ptr %35, align 8, !tbaa !14
  %36 = load i64, ptr %5, align 8, !tbaa !5
  %37 = load ptr, ptr %6, align 8, !tbaa !9
  %38 = getelementptr inbounds %struct.RingBuffer, ptr %37, i32 0, i32 3
  store i64 %36, ptr %38, align 8, !tbaa !15
  %39 = load ptr, ptr %6, align 8, !tbaa !9
  store ptr %39, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %40

40:                                               ; preds = %32, %30, %18, %13
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  %41 = load ptr, ptr %3, align 8
  ret ptr %41
}

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

; Function Attrs: nounwind allocsize(0)
declare noalias ptr @malloc(i64 noundef) #2

; Function Attrs: nounwind
declare void @free(ptr noundef) #3

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

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 allocsize(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 #3 = { nounwind "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 #4 = { nounwind }
attributes #5 = { nounwind allocsize(0) }

!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 = !{!"long", !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}
!11 = !{!12, !10, i64 40}
!12 = !{!"RingBuffer", !6, i64 0, !6, i64 8, !6, i64 16, !6, i64 24, !13, i64 32, !10, i64 40}
!13 = !{!"int", !7, i64 0}
!14 = !{!12, !6, i64 16}
!15 = !{!12, !6, i64 24}


; 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 nounwind willreturn memory(readwrite, argmem: none) uwtable
define dso_local noalias noundef ptr @WebRtc_CreateBuffer(i64 noundef %0, i64 noundef %1) local_unnamed_addr #0 {
  %3 = icmp eq i64 %0, 0
  %4 = icmp eq i64 %1, 0
  %or.cond = or i1 %3, %4
  br i1 %or.cond, label %15, label %5

5:                                                ; preds = %2
  %6 = tail call noalias dereferenceable_or_null(48) ptr @malloc(i64 noundef 48) #3
  %.not = icmp eq ptr %6, null
  br i1 %.not, label %15, label %7

7:                                                ; preds = %5
  %8 = mul i64 %1, %0
  %9 = tail call noalias ptr @malloc(i64 noundef %8) #3
  %10 = getelementptr inbounds i8, ptr %6, i64 40
  store ptr %9, ptr %10, align 8, !tbaa !5
  %.not17 = icmp eq ptr %9, null
  br i1 %.not17, label %11, label %12

11:                                               ; preds = %7
  tail call void @free(ptr noundef nonnull %6) #4
  br label %15

12:                                               ; preds = %7
  %13 = getelementptr inbounds i8, ptr %6, i64 16
  store i64 %0, ptr %13, align 8, !tbaa !12
  %14 = getelementptr inbounds i8, ptr %6, i64 24
  store i64 %1, ptr %14, align 8, !tbaa !13
  br label %15

15:                                               ; preds = %5, %2, %12, %11
  %.0 = phi ptr [ %6, %12 ], [ null, %11 ], [ null, %2 ], [ null, %5 ]
  ret ptr %.0
}

; Function Attrs: mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @malloc(i64 noundef) local_unnamed_addr #1

; Function Attrs: mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite)
declare void @free(ptr allocptr nocapture noundef) local_unnamed_addr #2

attributes #0 = { mustprogress nounwind willreturn memory(readwrite, argmem: none) 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 = { mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite) "alloc-family"="malloc" "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 = { mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite) "alloc-family"="malloc" "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 #3 = { nounwind allocsize(0) }
attributes #4 = { 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, !11, i64 40}
!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 16}
!13 = !{!6, !7, i64 24}


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