; LLVM IR from openai/procgen :: procgen/src/mazegen.ll (ZN7MazeGen12filter_cellsEi)

; 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.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%class.MazeGen = type { %class.Grid, ptr, i32, i32, i32, %"class.std::vector.0", %"class.std::vector", %"class.std::set", %"class.std::vector" }
%class.Grid = type { i32, i32, %"class.std::vector" }
%"class.std::vector.0" = type { %"struct.std::_Vector_base.1" }
%"struct.std::_Vector_base.1" = type { %"struct.std::_Vector_base<std::set<int>, std::allocator<std::set<int>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::set<int>, std::allocator<std::set<int>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::set<int>, std::allocator<std::set<int>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::set<int>, std::allocator<std::set<int>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.std::set" = type { %"class.std::_Rb_tree" }
%"class.std::_Rb_tree" = type { %"struct.std::_Rb_tree<int, int, std::_Identity<int>, std::less<int>>::_Rb_tree_impl" }
%"struct.std::_Rb_tree<int, int, std::_Identity<int>, std::less<int>>::_Rb_tree_impl" = type { [8 x i8], %"struct.std::_Rb_tree_header" }
%"struct.std::_Rb_tree_header" = type { %"struct.std::_Rb_tree_node_base", i64 }
%"struct.std::_Rb_tree_node_base" = type { i32, ptr, ptr, ptr }

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #0 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #0 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_ZN7MazeGen7get_objEi(ptr noundef nonnull align 8 dereferenceable(176), i32 noundef) #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 4 dereferenceable(4)) #2 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN7MazeGen12filter_cellsEi(ptr dead_on_unwind noalias writable sret(%"class.std::vector") align 8 %0, ptr noundef nonnull align 8 dereferenceable(176) %1, i32 noundef %2) #2 align 2 personality ptr @__gxx_personality_v0 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i1, align 1
  %8 = alloca i32, align 4
  %9 = alloca ptr, align 8
  %10 = alloca i32, align 4
  store ptr %0, ptr %4, align 8
  store ptr %1, ptr %5, align 8, !tbaa !5
  store i32 %2, ptr %6, align 4, !tbaa !9
  %11 = load ptr, ptr %5, align 8
  store i1 false, ptr %7, align 1
  call void @_ZNSt6vectorIiSaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  store i32 0, ptr %8, align 4, !tbaa !9
  br label %12

12:                                               ; preds = %34, %3
  %13 = load i32, ptr %8, align 4, !tbaa !9
  %14 = getelementptr inbounds %class.MazeGen, ptr %11, i32 0, i32 3
  %15 = load i32, ptr %14, align 4, !tbaa !11
  %16 = getelementptr inbounds %class.MazeGen, ptr %11, i32 0, i32 3
  %17 = load i32, ptr %16, align 4, !tbaa !11
  %18 = mul nsw i32 %15, %17
  %19 = icmp slt i32 %13, %18
  br i1 %19, label %21, label %20

20:                                               ; preds = %12
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  br label %37

21:                                               ; preds = %12
  %22 = load i32, ptr %8, align 4, !tbaa !9
  %23 = invoke noundef i32 @_ZN7MazeGen7get_objEi(ptr noundef nonnull align 8 dereferenceable(176) %11, i32 noundef %22)
          to label %24 unwind label %29

24:                                               ; preds = %21
  %25 = load i32, ptr %6, align 4, !tbaa !9
  %26 = icmp eq i32 %23, %25
  br i1 %26, label %27, label %33

27:                                               ; preds = %24
  invoke void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef nonnull align 4 dereferenceable(4) %8)
          to label %28 unwind label %29

28:                                               ; preds = %27
  br label %33

29:                                               ; preds = %27, %21
  %30 = landingpad { ptr, i32 }
          cleanup
  %31 = extractvalue { ptr, i32 } %30, 0
  store ptr %31, ptr %9, align 8
  %32 = extractvalue { ptr, i32 } %30, 1
  store i32 %32, ptr %10, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #3
  br label %41

33:                                               ; preds = %28, %24
  br label %34

34:                                               ; preds = %33
  %35 = load i32, ptr %8, align 4, !tbaa !9
  %36 = add nsw i32 %35, 1
  store i32 %36, ptr %8, align 4, !tbaa !9
  br label %12, !llvm.loop !31

37:                                               ; preds = %20
  store i1 true, ptr %7, align 1
  %38 = load i1, ptr %7, align 1
  br i1 %38, label %40, label %39

39:                                               ; preds = %37
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #3
  br label %40

40:                                               ; preds = %39, %37
  ret void

41:                                               ; preds = %29
  %42 = load ptr, ptr %9, align 8
  %43 = load i32, ptr %10, align 4
  %44 = insertvalue { ptr, i32 } poison, ptr %42, 0
  %45 = insertvalue { ptr, i32 } %44, i32 %43, 1
  resume { ptr, i32 } %45
}

attributes #0 = { 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #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 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 44}
!12 = !{!"_ZTS7MazeGen", !13, i64 0, !6, i64 32, !10, i64 40, !10, i64 44, !10, i64 48, !18, i64 56, !14, i64 80, !22, i64 104, !14, i64 152}
!13 = !{!"_ZTS4GridIiE", !10, i64 0, !10, i64 4, !14, i64 8}
!14 = !{!"_ZTSSt6vectorIiSaIiEE", !15, i64 0}
!15 = !{!"_ZTSSt12_Vector_baseIiSaIiEE", !16, i64 0}
!16 = !{!"_ZTSNSt12_Vector_baseIiSaIiEE12_Vector_implE", !17, i64 0}
!17 = !{!"_ZTSNSt12_Vector_baseIiSaIiEE17_Vector_impl_dataE", !6, i64 0, !6, i64 8, !6, i64 16}
!18 = !{!"_ZTSSt6vectorISt3setIiSt4lessIiESaIiEESaIS4_EE", !19, i64 0}
!19 = !{!"_ZTSSt12_Vector_baseISt3setIiSt4lessIiESaIiEESaIS4_EE", !20, i64 0}
!20 = !{!"_ZTSNSt12_Vector_baseISt3setIiSt4lessIiESaIiEESaIS4_EE12_Vector_implE", !21, i64 0}
!21 = !{!"_ZTSNSt12_Vector_baseISt3setIiSt4lessIiESaIiEESaIS4_EE17_Vector_impl_dataE", !6, i64 0, !6, i64 8, !6, i64 16}
!22 = !{!"_ZTSSt3setIiSt4lessIiESaIiEE", !23, i64 0}
!23 = !{!"_ZTSSt8_Rb_treeIiiSt9_IdentityIiESt4lessIiESaIiEE", !24, i64 0}
!24 = !{!"_ZTSNSt8_Rb_treeIiiSt9_IdentityIiESt4lessIiESaIiEE13_Rb_tree_implIS3_Lb1EEE", !25, i64 0, !27, i64 8}
!25 = !{!"_ZTSSt20_Rb_tree_key_compareISt4lessIiEE", !26, i64 0}
!26 = !{!"_ZTSSt4lessIiE"}
!27 = !{!"_ZTSSt15_Rb_tree_header", !28, i64 0, !30, i64 32}
!28 = !{!"_ZTSSt18_Rb_tree_node_base", !29, i64 0, !6, i64 8, !6, i64 16, !6, i64 24}
!29 = !{!"_ZTSSt14_Rb_tree_color", !7, i64 0}
!30 = !{!"long", !7, i64 0}
!31 = distinct !{!31, !32}
!32 = !{!"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"

%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" = type { ptr, ptr, ptr }

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #0 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #0 align 2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_ZN7MazeGen7get_objEi(ptr noundef nonnull align 8 dereferenceable(176), i32 noundef) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN7MazeGen12filter_cellsEi(ptr dead_on_unwind noalias nonnull writable sret(%"class.std::vector") align 8 %0, ptr noundef nonnull align 8 dereferenceable(176) %1, i32 noundef %2) local_unnamed_addr #2 align 2 personality ptr @__gxx_personality_v0 {
  %4 = alloca i32, align 4
  tail call void @_ZNSt6vectorIiSaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %4) #3
  %5 = getelementptr inbounds i8, ptr %1, i64 44
  store i32 0, ptr %4, align 4, !tbaa !5
  %6 = load i32, ptr %5, align 4, !tbaa !9
  %.not = icmp eq i32 %6, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %13, %3
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #3
  ret void

.lr.ph:                                           ; preds = %3, %13
  %storemerge4 = phi i32 [ %15, %13 ], [ 0, %3 ]
  %7 = invoke noundef i32 @_ZN7MazeGen7get_objEi(ptr noundef nonnull align 8 dereferenceable(176) %1, i32 noundef %storemerge4)
          to label %8 unwind label %11

8:                                                ; preds = %.lr.ph
  %9 = icmp eq i32 %7, %2
  br i1 %9, label %10, label %13

10:                                               ; preds = %8
  invoke void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef nonnull align 4 dereferenceable(4) %4)
          to label %13 unwind label %11

11:                                               ; preds = %10, %.lr.ph
  %12 = landingpad { ptr, i32 }
          cleanup
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #3
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #3
  resume { ptr, i32 } %12

13:                                               ; preds = %8, %10
  %14 = load i32, ptr %4, align 4, !tbaa !5
  %15 = add nsw i32 %14, 1
  store i32 %15, ptr %4, align 4, !tbaa !5
  %16 = load i32, ptr %5, align 4, !tbaa !9
  %17 = mul nsw i32 %16, %16
  %18 = icmp slt i32 %15, %17
  br i1 %18, label %.lr.ph, label %._crit_edge, !llvm.loop !30
}

attributes #0 = { 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 #1 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !6, i64 44}
!10 = !{!"_ZTS7MazeGen", !11, i64 0, !16, i64 32, !6, i64 40, !6, i64 44, !6, i64 48, !17, i64 56, !12, i64 80, !21, i64 104, !12, i64 152}
!11 = !{!"_ZTS4GridIiE", !6, i64 0, !6, i64 4, !12, i64 8}
!12 = !{!"_ZTSSt6vectorIiSaIiEE", !13, i64 0}
!13 = !{!"_ZTSSt12_Vector_baseIiSaIiEE", !14, i64 0}
!14 = !{!"_ZTSNSt12_Vector_baseIiSaIiEE12_Vector_implE", !15, i64 0}
!15 = !{!"_ZTSNSt12_Vector_baseIiSaIiEE17_Vector_impl_dataE", !16, i64 0, !16, i64 8, !16, i64 16}
!16 = !{!"any pointer", !7, i64 0}
!17 = !{!"_ZTSSt6vectorISt3setIiSt4lessIiESaIiEESaIS4_EE", !18, i64 0}
!18 = !{!"_ZTSSt12_Vector_baseISt3setIiSt4lessIiESaIiEESaIS4_EE", !19, i64 0}
!19 = !{!"_ZTSNSt12_Vector_baseISt3setIiSt4lessIiESaIiEESaIS4_EE12_Vector_implE", !20, i64 0}
!20 = !{!"_ZTSNSt12_Vector_baseISt3setIiSt4lessIiESaIiEESaIS4_EE17_Vector_impl_dataE", !16, i64 0, !16, i64 8, !16, i64 16}
!21 = !{!"_ZTSSt3setIiSt4lessIiESaIiEE", !22, i64 0}
!22 = !{!"_ZTSSt8_Rb_treeIiiSt9_IdentityIiESt4lessIiESaIiEE", !23, i64 0}
!23 = !{!"_ZTSNSt8_Rb_treeIiiSt9_IdentityIiESt4lessIiESaIiEE13_Rb_tree_implIS3_Lb1EEE", !24, i64 0, !26, i64 8}
!24 = !{!"_ZTSSt20_Rb_tree_key_compareISt4lessIiEE", !25, i64 0}
!25 = !{!"_ZTSSt4lessIiE"}
!26 = !{!"_ZTSSt15_Rb_tree_header", !27, i64 0, !29, i64 32}
!27 = !{!"_ZTSSt18_Rb_tree_node_base", !28, i64 0, !16, i64 8, !16, i64 16, !16, i64 24}
!28 = !{!"_ZTSSt14_Rb_tree_color", !7, i64 0}
!29 = !{!"long", !7, i64 0}
!30 = distinct !{!30, !31}
!31 = !{!"llvm.loop.mustprogress"}


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