; LLVM IR from nbdd0121/GenerationalGC :: Heap.ll (ZN6norlit2gc4Heap14Minor_ScanRootEPNS0_11MemorySpaceE)

; 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::Heap::Iterable" = type { %"class.norlit::gc::Heap::MemorySpaceIterator" }
%"class.norlit::gc::Heap::MemorySpaceIterator" = type <{ ptr, ptr, ptr, i8, [7 x i8] }>
%"class.norlit::gc::Heap::Iterable<norlit::gc::Heap::MemorySpaceIterator>::Iterator" = type { ptr }
%"class.norlit::gc::Object" = type <{ ptr, %union.anon, i8, i8, i8, [5 x i8] }>
%union.anon = type { %struct.anon }
%struct.anon = type { ptr, ptr }
%struct.anon.0 = type { ptr, i32, i32 }

; 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: mustprogress uwtable
define dso_local void @_ZN6norlit2gc4Heap14Minor_ScanRootEPNS0_11MemorySpaceE(ptr noundef %0) #1 align 2 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca %"class.norlit::gc::Heap::Iterable", align 8
  %5 = alloca %"class.norlit::gc::Heap::Iterable<norlit::gc::Heap::MemorySpaceIterator>::Iterator", align 8
  %6 = alloca %"class.norlit::gc::Heap::Iterable<norlit::gc::Heap::MemorySpaceIterator>::Iterator", align 8
  %7 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  call void @llvm.lifetime.start.p0(i64 32, ptr %4) #3
  call void @_ZN6norlit2gc4Heap8IterableINS1_19MemorySpaceIteratorEEC2IJRPNS0_11MemorySpaceEEEEDpOT_(ptr noundef nonnull align 8 dereferenceable(32) %4, ptr noundef nonnull align 8 dereferenceable(8) %2)
  store ptr %4, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  %8 = load ptr, ptr %3, align 8, !tbaa !5
  %9 = call ptr @_ZN6norlit2gc4Heap8IterableINS1_19MemorySpaceIteratorEE5beginEv(ptr noundef nonnull align 8 dereferenceable(32) %8)
  %10 = getelementptr inbounds %"class.norlit::gc::Heap::Iterable<norlit::gc::Heap::MemorySpaceIterator>::Iterator", ptr %5, i32 0, i32 0
  store ptr %9, ptr %10, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %11 = load ptr, ptr %3, align 8, !tbaa !5
  %12 = call ptr @_ZN6norlit2gc4Heap8IterableINS1_19MemorySpaceIteratorEE3endEv(ptr noundef nonnull align 8 dereferenceable(32) %11)
  %13 = getelementptr inbounds %"class.norlit::gc::Heap::Iterable<norlit::gc::Heap::MemorySpaceIterator>::Iterator", ptr %6, i32 0, i32 0
  store ptr %12, ptr %13, align 8
  br label %14

14:                                               ; preds = %28, %1
  %15 = call noundef zeroext i1 @_ZN6norlit2gc4Heap8IterableINS1_19MemorySpaceIteratorEE8IteratorneERKS5_(ptr noundef nonnull align 8 dereferenceable(8) %5, ptr noundef nonnull align 8 dereferenceable(8) %6)
  br i1 %15, label %17, label %16

16:                                               ; preds = %14
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  call void @llvm.lifetime.end.p0(i64 32, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  br label %29

17:                                               ; preds = %14
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %18 = call noundef ptr @_ZN6norlit2gc4Heap8IterableINS1_19MemorySpaceIteratorEE8IteratordeEv(ptr noundef nonnull align 8 dereferenceable(8) %5)
  store ptr %18, ptr %7, align 8, !tbaa !5
  %19 = load ptr, ptr %7, align 8, !tbaa !5
  %20 = getelementptr inbounds %"class.norlit::gc::Object", ptr %19, i32 0, i32 1
  %21 = getelementptr inbounds %struct.anon.0, ptr %20, i32 0, i32 1
  %22 = load i32, ptr %21, align 8, !tbaa !9
  %23 = icmp ne i32 %22, 0
  br i1 %23, label %24, label %27

24:                                               ; preds = %17
  %25 = load ptr, ptr %7, align 8, !tbaa !5
  %26 = getelementptr inbounds %"class.norlit::gc::Object", ptr %25, i32 0, i32 3
  store i8 1, ptr %26, align 1, !tbaa !10
  br label %27

27:                                               ; preds = %24, %17
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  br label %28

28:                                               ; preds = %27
  call void @_ZN6norlit2gc4Heap8IterableINS1_19MemorySpaceIteratorEE8IteratorppEv(ptr noundef nonnull align 8 dereferenceable(8) %5)
  br label %14

29:                                               ; preds = %16
  ret void
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN6norlit2gc4Heap8IterableINS1_19MemorySpaceIteratorEEC2IJRPNS0_11MemorySpaceEEEEDpOT_(ptr noundef nonnull align 8 dereferenceable(32), ptr noundef nonnull align 8 dereferenceable(8)) unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local ptr @_ZN6norlit2gc4Heap8IterableINS1_19MemorySpaceIteratorEE5beginEv(ptr noundef nonnull align 8 dereferenceable(32)) #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local ptr @_ZN6norlit2gc4Heap8IterableINS1_19MemorySpaceIteratorEE3endEv(ptr noundef nonnull align 8 dereferenceable(32)) #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_ZN6norlit2gc4Heap8IterableINS1_19MemorySpaceIteratorEE8IteratorneERKS5_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef ptr @_ZN6norlit2gc4Heap8IterableINS1_19MemorySpaceIteratorEE8IteratordeEv(ptr noundef nonnull align 8 dereferenceable(8)) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN6norlit2gc4Heap8IterableINS1_19MemorySpaceIteratorEE8IteratorppEv(ptr noundef nonnull align 8 dereferenceable(8)) #2 align 2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { 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 #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 = !{!7, !7, i64 0}
!10 = !{!11, !13, i64 25}
!11 = !{!"_ZTSN6norlit2gc6ObjectE", !7, i64 8, !12, i64 24, !13, i64 25, !7, i64 26}
!12 = !{!"_ZTSN6norlit2gc5SpaceE", !7, i64 0}
!13 = !{!"_ZTSN6norlit2gc6StatusE", !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"

%"class.norlit::gc::Heap::Iterable" = type { %"class.norlit::gc::Heap::MemorySpaceIterator" }
%"class.norlit::gc::Heap::MemorySpaceIterator" = type <{ ptr, ptr, ptr, i8, [7 x i8] }>
%"class.norlit::gc::Heap::Iterable<norlit::gc::Heap::MemorySpaceIterator>::Iterator" = type { ptr }

; 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: mustprogress uwtable
define dso_local void @_ZN6norlit2gc4Heap14Minor_ScanRootEPNS0_11MemorySpaceE(ptr noundef %0) local_unnamed_addr #1 align 2 {
  %2 = alloca ptr, align 8
  %3 = alloca %"class.norlit::gc::Heap::Iterable", align 8
  %4 = alloca %"class.norlit::gc::Heap::Iterable<norlit::gc::Heap::MemorySpaceIterator>::Iterator", align 8
  %5 = alloca %"class.norlit::gc::Heap::Iterable<norlit::gc::Heap::MemorySpaceIterator>::Iterator", align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %3) #3
  call void @_ZN6norlit2gc4Heap8IterableINS1_19MemorySpaceIteratorEEC2IJRPNS0_11MemorySpaceEEEEDpOT_(ptr noundef nonnull align 8 dereferenceable(32) %3, ptr noundef nonnull align 8 dereferenceable(8) %2)
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #3
  %6 = call ptr @_ZN6norlit2gc4Heap8IterableINS1_19MemorySpaceIteratorEE5beginEv(ptr noundef nonnull align 8 dereferenceable(32) %3)
  store ptr %6, ptr %4, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %5) #3
  %7 = call ptr @_ZN6norlit2gc4Heap8IterableINS1_19MemorySpaceIteratorEE3endEv(ptr noundef nonnull align 8 dereferenceable(32) %3)
  store ptr %7, ptr %5, align 8
  %8 = call noundef zeroext i1 @_ZN6norlit2gc4Heap8IterableINS1_19MemorySpaceIteratorEE8IteratorneERKS5_(ptr noundef nonnull align 8 dereferenceable(8) %4, ptr noundef nonnull align 8 dereferenceable(8) %5)
  br i1 %8, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %14, %1
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %5) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #3
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %3) #3
  ret void

.lr.ph:                                           ; preds = %1, %14
  %9 = call noundef ptr @_ZN6norlit2gc4Heap8IterableINS1_19MemorySpaceIteratorEE8IteratordeEv(ptr noundef nonnull align 8 dereferenceable(8) %4)
  %10 = getelementptr inbounds i8, ptr %9, i64 16
  %11 = load i32, ptr %10, align 8, !tbaa !9
  %.not = icmp eq i32 %11, 0
  br i1 %.not, label %14, label %12

12:                                               ; preds = %.lr.ph
  %13 = getelementptr inbounds i8, ptr %9, i64 25
  store i8 1, ptr %13, align 1, !tbaa !10
  br label %14

14:                                               ; preds = %12, %.lr.ph
  call void @_ZN6norlit2gc4Heap8IterableINS1_19MemorySpaceIteratorEE8IteratorppEv(ptr noundef nonnull align 8 dereferenceable(8) %4)
  %15 = call noundef zeroext i1 @_ZN6norlit2gc4Heap8IterableINS1_19MemorySpaceIteratorEE8IteratorneERKS5_(ptr noundef nonnull align 8 dereferenceable(8) %4, ptr noundef nonnull align 8 dereferenceable(8) %5)
  br i1 %15, label %.lr.ph, label %._crit_edge
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN6norlit2gc4Heap8IterableINS1_19MemorySpaceIteratorEEC2IJRPNS0_11MemorySpaceEEEEDpOT_(ptr noundef nonnull align 8 dereferenceable(32), ptr noundef nonnull align 8 dereferenceable(8)) unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local ptr @_ZN6norlit2gc4Heap8IterableINS1_19MemorySpaceIteratorEE5beginEv(ptr noundef nonnull align 8 dereferenceable(32)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local ptr @_ZN6norlit2gc4Heap8IterableINS1_19MemorySpaceIteratorEE3endEv(ptr noundef nonnull align 8 dereferenceable(32)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_ZN6norlit2gc4Heap8IterableINS1_19MemorySpaceIteratorEE8IteratorneERKS5_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef ptr @_ZN6norlit2gc4Heap8IterableINS1_19MemorySpaceIteratorEE8IteratordeEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN6norlit2gc4Heap8IterableINS1_19MemorySpaceIteratorEE8IteratorppEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #2 align 2

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { 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 #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 = !{!7, !7, i64 0}
!10 = !{!11, !13, i64 25}
!11 = !{!"_ZTSN6norlit2gc6ObjectE", !7, i64 8, !12, i64 24, !13, i64 25, !7, i64 26}
!12 = !{!"_ZTSN6norlit2gc5SpaceE", !7, i64 0}
!13 = !{!"_ZTSN6norlit2gc6StatusE", !7, i64 0}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass