; LLVM IR from steps3d/graphics-book :: Code/Core/VertexBuffer.ll (ZN12VertexBuffer7destroyEv)

; 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.VertexBuffer = type <{ i32, i32, i8, [3 x i8] }>

@__glewDeleteBuffers = external global ptr, align 8

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN12VertexBuffer7destroyEv(ptr noundef nonnull align 4 dereferenceable(9) %0) #0 align 2 {
  %2 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %3 = load ptr, ptr %2, align 8
  %4 = getelementptr inbounds %class.VertexBuffer, ptr %3, i32 0, i32 0
  %5 = load i32, ptr %4, align 4, !tbaa !9
  %6 = icmp ne i32 %5, 0
  br i1 %6, label %7, label %10

7:                                                ; preds = %1
  %8 = load ptr, ptr @__glewDeleteBuffers, align 8, !tbaa !5
  %9 = getelementptr inbounds %class.VertexBuffer, ptr %3, i32 0, i32 0
  call void %8(i32 noundef 1, ptr noundef %9)
  br label %10

10:                                               ; preds = %7, %1
  %11 = getelementptr inbounds %class.VertexBuffer, ptr %3, i32 0, i32 0
  store i32 0, ptr %11, align 4, !tbaa !9
  %12 = getelementptr inbounds %class.VertexBuffer, ptr %3, i32 0, i32 2
  store i8 0, ptr %12, align 4, !tbaa !13
  %13 = getelementptr inbounds %class.VertexBuffer, ptr %3, i32 0, i32 1
  store i32 0, ptr %13, align 4, !tbaa !14
  ret void
}

attributes #0 = { mustprogress 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++ TBAA"}
!9 = !{!10, !11, i64 0}
!10 = !{!"_ZTS12VertexBuffer", !11, i64 0, !11, i64 4, !12, i64 8}
!11 = !{!"int", !7, i64 0}
!12 = !{!"bool", !7, i64 0}
!13 = !{!10, !12, i64 8}
!14 = !{!10, !11, i64 4}


; 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"

@__glewDeleteBuffers = external local_unnamed_addr global ptr, align 8

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN12VertexBuffer7destroyEv(ptr noundef nonnull align 4 dereferenceable(9) %0) local_unnamed_addr #0 align 2 {
  %2 = load i32, ptr %0, align 4, !tbaa !5
  %.not = icmp eq i32 %2, 0
  br i1 %.not, label %5, label %3

3:                                                ; preds = %1
  %4 = load ptr, ptr @__glewDeleteBuffers, align 8, !tbaa !11
  tail call void %4(i32 noundef 1, ptr noundef nonnull %0)
  br label %5

5:                                                ; preds = %3, %1
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 4 dereferenceable(9) %0, i8 0, i64 9, i1 false)
  ret void
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #1

attributes #0 = { mustprogress 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 nounwind willreturn memory(argmem: write) }

!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, !7, i64 0}
!6 = !{!"_ZTS12VertexBuffer", !7, i64 0, !7, i64 4, !10, i64 8}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"bool", !8, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"any pointer", !8, i64 0}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InstCombinePass,MemCpyOptPass,SROAPass,TailCallElimPass