; LLVM IR from rmind/ringbuf :: src (ringbuf)

; 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.ringbuf = type { i64, i64, i64, i64, i32, [0 x %struct.ringbuf_worker] }
%struct.ringbuf_worker = type { i64, i32 }

; Function Attrs: nounwind uwtable
define dso_local i32 @ringbuf_setup(ptr noundef %0, i32 noundef %1, i64 noundef %2) #0 {
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i64, align 8
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !9
  store i64 %2, ptr %7, align 8, !tbaa !11
  %8 = load i64, ptr %7, align 8, !tbaa !11
  %9 = icmp uge i64 %8, 4294967295
  br i1 %9, label %10, label %12

10:                                               ; preds = %3
  %11 = call ptr @__errno_location() #3
  store i32 22, ptr %11, align 4, !tbaa !9
  store i32 -1, ptr %4, align 4
  br label %26

12:                                               ; preds = %3
  %13 = load ptr, ptr %5, align 8, !tbaa !5
  %14 = load i32, ptr %6, align 4, !tbaa !9
  %15 = zext i32 %14 to i64
  %16 = mul i64 %15, 16
  %17 = add i64 40, %16
  call void @llvm.memset.p0.i64(ptr align 8 %13, i8 0, i64 %17, i1 false)
  %18 = load i64, ptr %7, align 8, !tbaa !11
  %19 = load ptr, ptr %5, align 8, !tbaa !5
  %20 = getelementptr inbounds %struct.ringbuf, ptr %19, i32 0, i32 0
  store i64 %18, ptr %20, align 8, !tbaa !11
  %21 = load ptr, ptr %5, align 8, !tbaa !5
  %22 = getelementptr inbounds %struct.ringbuf, ptr %21, i32 0, i32 2
  store i64 9223372036854775807, ptr %22, align 8, !tbaa !11
  %23 = load i32, ptr %6, align 4, !tbaa !9
  %24 = load ptr, ptr %5, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct.ringbuf, ptr %24, i32 0, i32 4
  store i32 %23, ptr %25, align 8, !tbaa !9
  store i32 0, ptr %4, align 4
  br label %26

26:                                               ; preds = %12, %10
  %27 = load i32, ptr %4, align 4
  ret i32 %27
}

; Function Attrs: nounwind willreturn memory(none)
declare ptr @__errno_location() #1

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

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 = { nounwind willreturn memory(none) "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: write) }
attributes #3 = { nounwind willreturn memory(none) }

!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 = !{!"int", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"long", !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 nosync nounwind willreturn memory(write, inaccessiblemem: none) uwtable
define dso_local range(i32 -1, 1) i32 @ringbuf_setup(ptr nocapture noundef writeonly %0, i32 noundef %1, i64 noundef %2) local_unnamed_addr #0 {
  %4 = icmp ugt i64 %2, 4294967294
  br i1 %4, label %5, label %7

5:                                                ; preds = %3
  %6 = tail call ptr @__errno_location() #3
  store i32 22, ptr %6, align 4, !tbaa !5
  br label %13

7:                                                ; preds = %3
  %8 = zext i32 %1 to i64
  %9 = shl nuw nsw i64 %8, 4
  %10 = add nuw nsw i64 %9, 40
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(1) %0, i8 0, i64 %10, i1 false)
  store i64 %2, ptr %0, align 8, !tbaa !9
  %11 = getelementptr inbounds i8, ptr %0, i64 16
  store i64 9223372036854775807, ptr %11, align 8, !tbaa !9
  %12 = getelementptr inbounds i8, ptr %0, i64 32
  store i32 %1, ptr %12, align 8, !tbaa !5
  br label %13

13:                                               ; preds = %7, %5
  %.0 = phi i32 [ -1, %5 ], [ 0, %7 ]
  ret i32 %.0
}

; Function Attrs: mustprogress nofree nosync nounwind willreturn memory(none)
declare ptr @__errno_location() local_unnamed_addr #1

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

attributes #0 = { mustprogress nofree nosync nounwind willreturn memory(write, inaccessiblemem: 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 nosync nounwind willreturn memory(none) "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: write) }
attributes #3 = { nounwind willreturn memory(none) }

!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 = !{!"long", !7, i64 0}


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