; LLVM IR from TobiasKozel/VAE :: external/portaudio/src/common (pa_ringbuffer)

; 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.PaUtilRingBuffer = type { i64, i64, i64, i64, i64, i64, 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
declare dso_local i64 @PaUtil_GetRingBufferReadRegions(ptr noundef, i64 noundef, ptr noundef, ptr noundef, ptr noundef, ptr noundef) #1

; Function Attrs: nounwind uwtable
declare dso_local i64 @PaUtil_AdvanceRingBufferReadIndex(ptr noundef, i64 noundef) #1

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #2

; Function Attrs: nounwind uwtable
define dso_local i64 @PaUtil_ReadRingBuffer(ptr noundef %0, ptr noundef %1, i64 noundef %2) #1 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  %9 = alloca i64, align 8
  %10 = alloca ptr, align 8
  %11 = alloca ptr, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  store i64 %2, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %11) #3
  %12 = load ptr, ptr %4, align 8, !tbaa !5
  %13 = load i64, ptr %6, align 8, !tbaa !9
  %14 = call i64 @PaUtil_GetRingBufferReadRegions(ptr noundef %12, i64 noundef %13, ptr noundef %10, ptr noundef %7, ptr noundef %11, ptr noundef %8)
  store i64 %14, ptr %9, align 8, !tbaa !9
  %15 = load i64, ptr %8, align 8, !tbaa !9
  %16 = icmp sgt i64 %15, 0
  br i1 %16, label %17, label %39

17:                                               ; preds = %3
  %18 = load ptr, ptr %5, align 8, !tbaa !5
  %19 = load ptr, ptr %10, align 8, !tbaa !5
  %20 = load i64, ptr %7, align 8, !tbaa !9
  %21 = load ptr, ptr %4, align 8, !tbaa !5
  %22 = getelementptr inbounds %struct.PaUtilRingBuffer, ptr %21, i32 0, i32 5
  %23 = load i64, ptr %22, align 8, !tbaa !11
  %24 = mul nsw i64 %20, %23
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %18, ptr align 1 %19, i64 %24, i1 false)
  %25 = load ptr, ptr %5, align 8, !tbaa !5
  %26 = load i64, ptr %7, align 8, !tbaa !9
  %27 = load ptr, ptr %4, align 8, !tbaa !5
  %28 = getelementptr inbounds %struct.PaUtilRingBuffer, ptr %27, i32 0, i32 5
  %29 = load i64, ptr %28, align 8, !tbaa !11
  %30 = mul nsw i64 %26, %29
  %31 = getelementptr inbounds i8, ptr %25, i64 %30
  store ptr %31, ptr %5, align 8, !tbaa !5
  %32 = load ptr, ptr %5, align 8, !tbaa !5
  %33 = load ptr, ptr %11, align 8, !tbaa !5
  %34 = load i64, ptr %8, align 8, !tbaa !9
  %35 = load ptr, ptr %4, align 8, !tbaa !5
  %36 = getelementptr inbounds %struct.PaUtilRingBuffer, ptr %35, i32 0, i32 5
  %37 = load i64, ptr %36, align 8, !tbaa !11
  %38 = mul nsw i64 %34, %37
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %32, ptr align 1 %33, i64 %38, i1 false)
  br label %47

39:                                               ; preds = %3
  %40 = load ptr, ptr %5, align 8, !tbaa !5
  %41 = load ptr, ptr %10, align 8, !tbaa !5
  %42 = load i64, ptr %7, align 8, !tbaa !9
  %43 = load ptr, ptr %4, align 8, !tbaa !5
  %44 = getelementptr inbounds %struct.PaUtilRingBuffer, ptr %43, i32 0, i32 5
  %45 = load i64, ptr %44, align 8, !tbaa !11
  %46 = mul nsw i64 %42, %45
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %40, ptr align 1 %41, i64 %46, i1 false)
  br label %47

47:                                               ; preds = %39, %17
  %48 = load ptr, ptr %4, align 8, !tbaa !5
  %49 = load i64, ptr %9, align 8, !tbaa !9
  %50 = call i64 @PaUtil_AdvanceRingBufferReadIndex(ptr noundef %48, i64 noundef %49)
  %51 = load i64, ptr %9, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  ret i64 %51
}

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 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { 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 = !{!"long", !7, i64 0}
!11 = !{!12, !10, i64 40}
!12 = !{!"PaUtilRingBuffer", !10, i64 0, !10, i64 8, !10, i64 16, !10, i64 24, !10, i64 32, !10, i64 40, !6, i64 48}


; 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
declare dso_local i64 @PaUtil_GetRingBufferReadRegions(ptr noundef, i64 noundef, ptr noundef, ptr noundef, ptr noundef, ptr noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
declare dso_local i64 @PaUtil_AdvanceRingBufferReadIndex(ptr noundef, i64 noundef) local_unnamed_addr #1

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #2

; Function Attrs: nounwind uwtable
define dso_local i64 @PaUtil_ReadRingBuffer(ptr noundef %0, ptr nocapture noundef writeonly %1, i64 noundef %2) local_unnamed_addr #1 {
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %5) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %6) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %7) #3
  %8 = call i64 @PaUtil_GetRingBufferReadRegions(ptr noundef %0, i64 noundef %2, ptr noundef nonnull %6, ptr noundef nonnull %4, ptr noundef nonnull %7, ptr noundef nonnull %5)
  %9 = load i64, ptr %5, align 8, !tbaa !5
  %10 = icmp sgt i64 %9, 0
  %11 = load ptr, ptr %6, align 8, !tbaa !9
  %12 = load i64, ptr %4, align 8, !tbaa !5
  %13 = getelementptr inbounds i8, ptr %0, i64 40
  %14 = load i64, ptr %13, align 8, !tbaa !11
  %15 = mul nsw i64 %14, %12
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %1, ptr align 1 %11, i64 %15, i1 false)
  br i1 %10, label %16, label %22

16:                                               ; preds = %3
  %17 = load i64, ptr %13, align 8, !tbaa !11
  %18 = mul nsw i64 %17, %12
  %19 = getelementptr inbounds i8, ptr %1, i64 %18
  %20 = load ptr, ptr %7, align 8, !tbaa !9
  %21 = mul nsw i64 %17, %9
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %19, ptr align 1 %20, i64 %21, i1 false)
  br label %22

22:                                               ; preds = %3, %16
  %23 = call i64 @PaUtil_AdvanceRingBufferReadIndex(ptr noundef nonnull %0, i64 noundef %8)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %7) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %6) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %5) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #3
  ret i64 %8
}

attributes #0 = { mustprogress 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 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { 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 = !{!"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, !6, i64 40}
!12 = !{!"PaUtilRingBuffer", !6, i64 0, !6, i64 8, !6, i64 16, !6, i64 24, !6, i64 32, !6, i64 40, !10, i64 48}


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