; LLVM IR from Ultrawipf/OpenFFBoard :: Firmware/FFBoard/Src/ringbufferwrapper.ll (ZN17RingBufferWrapperD2Ev)

; 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"

%class.RingBufferWrapper = type <{ ptr, %struct.RingBuffer, i8, [7 x i8] }>
%struct.RingBuffer = type { i64, i64, i64, ptr }

@_ZTV17RingBufferWrapper = external dso_local unnamed_addr constant { [4 x ptr] }, align 8

; Function Attrs: nobuiltin nounwind
declare void @_ZdaPv(ptr noundef) #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN17RingBufferWrapperD2Ev(ptr noundef nonnull align 8 dereferenceable(41) %0) unnamed_addr #1 align 2 {
  %2 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %3 = load ptr, ptr %2, align 8
  store ptr getelementptr inbounds inrange(-16, 16) ({ [4 x ptr] }, ptr @_ZTV17RingBufferWrapper, i32 0, i32 0, i32 2), ptr %3, align 8, !tbaa !9
  %4 = getelementptr inbounds %class.RingBufferWrapper, ptr %3, i32 0, i32 1
  %5 = getelementptr inbounds %struct.RingBuffer, ptr %4, i32 0, i32 3
  %6 = load ptr, ptr %5, align 8, !tbaa !11
  %7 = icmp ne ptr %6, null
  br i1 %7, label %8, label %15

8:                                                ; preds = %1
  %9 = getelementptr inbounds %class.RingBufferWrapper, ptr %3, i32 0, i32 1
  %10 = getelementptr inbounds %struct.RingBuffer, ptr %9, i32 0, i32 3
  %11 = load ptr, ptr %10, align 8, !tbaa !11
  %12 = icmp eq ptr %11, null
  br i1 %12, label %14, label %13

13:                                               ; preds = %8
  call void @_ZdaPv(ptr noundef %11) #2
  br label %14

14:                                               ; preds = %13, %8
  br label %15

15:                                               ; preds = %14, %1
  ret void
}

attributes #0 = { nobuiltin 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 #1 = { mustprogress 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 = { builtin 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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"vtable pointer", !8, i64 0}
!11 = !{!12, !6, i64 32}
!12 = !{!"_ZTS17RingBufferWrapper", !13, i64 8, !15, i64 40}
!13 = !{!"_ZTS10RingBuffer", !14, i64 0, !14, i64 8, !14, i64 16, !6, i64 24}
!14 = !{!"long", !7, i64 0}
!15 = !{!"bool", !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"

@_ZTV17RingBufferWrapper = external dso_local unnamed_addr constant { [4 x ptr] }, align 8

; Function Attrs: nobuiltin nounwind
declare void @_ZdaPv(ptr noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN17RingBufferWrapperD2Ev(ptr nocapture noundef nonnull align 8 dereferenceable(41) %0) unnamed_addr #1 align 2 {
  store ptr getelementptr inbounds inrange(-16, 16) (i8, ptr @_ZTV17RingBufferWrapper, i64 16), ptr %0, align 8, !tbaa !5
  %2 = getelementptr inbounds i8, ptr %0, i64 32
  %3 = load ptr, ptr %2, align 8, !tbaa !8
  %.not = icmp eq ptr %3, null
  br i1 %.not, label %5, label %4

4:                                                ; preds = %1
  tail call void @_ZdaPv(ptr noundef nonnull %3) #2
  br label %5

5:                                                ; preds = %4, %1
  ret void
}

attributes #0 = { nobuiltin 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 #1 = { mustprogress 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 = { builtin 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 = !{!"vtable pointer", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = !{!9, !13, i64 32}
!9 = !{!"_ZTS17RingBufferWrapper", !10, i64 8, !14, i64 40}
!10 = !{!"_ZTS10RingBuffer", !11, i64 0, !11, i64 8, !11, i64 16, !13, i64 24}
!11 = !{!"long", !12, i64 0}
!12 = !{!"omnipotent char", !7, i64 0}
!13 = !{!"any pointer", !12, i64 0}
!14 = !{!"bool", !12, i64 0}


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