; LLVM IR from nbdd0121/GenerationalGC :: Array.ll (ZN6norlit2gc6detail9ArrayBaseC2Em)

; 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.norlit::gc::detail::ArrayBase" = type { %"class.norlit::gc::Object.base", i64, [1 x ptr] }
%"class.norlit::gc::Object.base" = type <{ ptr, %union.anon, i8, i8, i8 }>
%union.anon = type { %struct.anon }
%struct.anon = type { ptr, ptr }

@_ZTVN6norlit2gc6detail9ArrayBaseE = external dso_local unnamed_addr constant { [8 x ptr] }, align 8

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN6norlit2gc6detail9ArrayBaseC2Em(ptr noundef nonnull align 8 dereferenceable(48) %0, i64 noundef %1) unnamed_addr #0 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i64 %1, ptr %4, align 8, !tbaa !9
  %6 = load ptr, ptr %3, align 8
  call void @_ZN6norlit2gc6ObjectC2Ev(ptr noundef nonnull align 8 dereferenceable(27) %6)
  store ptr getelementptr inbounds inrange(-16, 48) ({ [8 x ptr] }, ptr @_ZTVN6norlit2gc6detail9ArrayBaseE, i32 0, i32 0, i32 2), ptr %6, align 8, !tbaa !11
  %7 = getelementptr inbounds %"class.norlit::gc::detail::ArrayBase", ptr %6, i32 0, i32 1
  %8 = load i64, ptr %4, align 8, !tbaa !9
  store i64 %8, ptr %7, align 8, !tbaa !13
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  store i64 0, ptr %5, align 8, !tbaa !9
  br label %9

9:                                                ; preds = %18, %2
  %10 = load i64, ptr %5, align 8, !tbaa !9
  %11 = load i64, ptr %4, align 8, !tbaa !9
  %12 = icmp ult i64 %10, %11
  br i1 %12, label %14, label %13

13:                                               ; preds = %9
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  br label %21

14:                                               ; preds = %9
  %15 = getelementptr inbounds %"class.norlit::gc::detail::ArrayBase", ptr %6, i32 0, i32 2
  %16 = load i64, ptr %5, align 8, !tbaa !9
  %17 = getelementptr inbounds [1 x ptr], ptr %15, i64 0, i64 %16
  store ptr null, ptr %17, align 8, !tbaa !5
  br label %18

18:                                               ; preds = %14
  %19 = load i64, ptr %5, align 8, !tbaa !9
  %20 = add i64 %19, 1
  store i64 %20, ptr %5, align 8, !tbaa !9
  br label %9, !llvm.loop !18

21:                                               ; preds = %13
  ret void
}

declare void @_ZN6norlit2gc6ObjectC2Ev(ptr noundef nonnull align 8 dereferenceable(27)) unnamed_addr #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

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 = { "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 nosync 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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"vtable pointer", !8, i64 0}
!13 = !{!14, !10, i64 32}
!14 = !{!"_ZTSN6norlit2gc6detail9ArrayBaseE", !15, i64 0, !10, i64 32, !7, i64 40}
!15 = !{!"_ZTSN6norlit2gc6ObjectE", !7, i64 8, !16, i64 24, !17, i64 25, !7, i64 26}
!16 = !{!"_ZTSN6norlit2gc5SpaceE", !7, i64 0}
!17 = !{!"_ZTSN6norlit2gc6StatusE", !7, i64 0}
!18 = distinct !{!18, !19}
!19 = !{!"llvm.loop.mustprogress"}


; 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"

@_ZTVN6norlit2gc6detail9ArrayBaseE = external dso_local unnamed_addr constant { [8 x ptr] }, align 8

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN6norlit2gc6detail9ArrayBaseC2Em(ptr noundef nonnull align 8 dereferenceable(48) %0, i64 noundef %1) unnamed_addr #0 align 2 {
  tail call void @_ZN6norlit2gc6ObjectC2Ev(ptr noundef nonnull align 8 dereferenceable(27) %0)
  store ptr getelementptr inbounds inrange(-16, 48) (i8, ptr @_ZTVN6norlit2gc6detail9ArrayBaseE, i64 16), ptr %0, align 8, !tbaa !5
  %3 = getelementptr inbounds i8, ptr %0, i64 32
  store i64 %1, ptr %3, align 8, !tbaa !8
  %.not = icmp eq i64 %1, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2
  %4 = getelementptr inbounds i8, ptr %0, i64 40
  %5 = shl nuw i64 %1, 3
  tail call void @llvm.memset.p0.i64(ptr nonnull align 8 %4, i8 0, i64 %5, i1 false), !tbaa !15
  br label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %2
  ret void
}

declare void @_ZN6norlit2gc6ObjectC2Ev(ptr noundef nonnull align 8 dereferenceable(27)) unnamed_addr #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 = { 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 = { "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) }

!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, !14, i64 32}
!9 = !{!"_ZTSN6norlit2gc6detail9ArrayBaseE", !10, i64 0, !14, i64 32, !11, i64 40}
!10 = !{!"_ZTSN6norlit2gc6ObjectE", !11, i64 8, !12, i64 24, !13, i64 25, !11, i64 26}
!11 = !{!"omnipotent char", !7, i64 0}
!12 = !{!"_ZTSN6norlit2gc5SpaceE", !11, i64 0}
!13 = !{!"_ZTSN6norlit2gc6StatusE", !11, i64 0}
!14 = !{!"long", !11, i64 0}
!15 = !{!16, !16, i64 0}
!16 = !{!"any pointer", !11, i64 0}


; Effective O3 passes: CorrelatedValuePropagationPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LICMPass,LoopIdiomRecognizePass,LoopRotatePass,LoopSimplifyPass,SROAPass,SimplifyCFGPass,TailCallElimPass