; LLVM IR from humz2k/sugaryc :: ext/bdwgc (obj_map)

; 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"

%struct._GC_arrays = type { i64, i64, i64, ptr, i64, i64, i64, i64, i64, i64, i64, i64, i64, i64, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, i32, i32, i32, i64, i64, i64, ptr, ptr, i64, i32, i64, i64, i64, %struct.dl_hashtbl_s, %struct.dl_hashtbl_s, %struct.fnlz_roots_s, i32, ptr, i64, i64, i32, i64, i64, i64, ptr, [64 x ptr], [8 x i8], [64 x ptr], [129 x ptr], [129 x ptr], [129 x ptr], [2049 x i64], [129 x ptr], [4096 x i8], [4096 x i64], [4096 x i64], ptr, [2048 x %struct.roots], [512 x %struct.exclusion], [2048 x ptr] }
%struct.dl_hashtbl_s = type { ptr, i64, i32 }
%struct.fnlz_roots_s = type { ptr, ptr }
%struct.roots = type { ptr, ptr, ptr, i32 }
%struct.exclusion = type { ptr, ptr }

@GC_arrays = external global %struct._GC_arrays, align 8
@GC_all_interior_pointers = external global i32, align 4

; 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: nounwind uwtable
define dso_local void @GC_initialize_offsets() #1 {
  %1 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #3
  %2 = load i32, ptr @GC_all_interior_pointers, align 4, !tbaa !5
  %3 = icmp ne i32 %2, 0
  br i1 %3, label %4, label %17

4:                                                ; preds = %0
  store i32 0, ptr %1, align 4, !tbaa !5
  br label %5

5:                                                ; preds = %13, %4
  %6 = load i32, ptr %1, align 4, !tbaa !5
  %7 = zext i32 %6 to i64
  %8 = icmp ult i64 %7, 4096
  br i1 %8, label %9, label %16

9:                                                ; preds = %5
  %10 = load i32, ptr %1, align 4, !tbaa !5
  %11 = zext i32 %10 to i64
  %12 = getelementptr inbounds [4096 x i8], ptr getelementptr inbounds (%struct._GC_arrays, ptr @GC_arrays, i32 0, i32 55), i64 0, i64 %11
  store i8 1, ptr %12, align 1, !tbaa !9
  br label %13

13:                                               ; preds = %9
  %14 = load i32, ptr %1, align 4, !tbaa !5
  %15 = add i32 %14, 1
  store i32 %15, ptr %1, align 4, !tbaa !5
  br label %5, !llvm.loop !10

16:                                               ; preds = %5
  br label %30

17:                                               ; preds = %0
  call void @llvm.memset.p0.i64(ptr align 8 getelementptr inbounds (%struct._GC_arrays, ptr @GC_arrays, i32 0, i32 55), i8 0, i64 4096, i1 false)
  store i32 0, ptr %1, align 4, !tbaa !5
  br label %18

18:                                               ; preds = %26, %17
  %19 = load i32, ptr %1, align 4, !tbaa !5
  %20 = zext i32 %19 to i64
  %21 = icmp ult i64 %20, 8
  br i1 %21, label %22, label %29

22:                                               ; preds = %18
  %23 = load i32, ptr %1, align 4, !tbaa !5
  %24 = zext i32 %23 to i64
  %25 = getelementptr inbounds [8 x i8], ptr getelementptr inbounds (%struct._GC_arrays, ptr @GC_arrays, i32 0, i32 48), i64 0, i64 %24
  store i8 0, ptr %25, align 1, !tbaa !9
  br label %26

26:                                               ; preds = %22
  %27 = load i32, ptr %1, align 4, !tbaa !5
  %28 = add i32 %27, 1
  store i32 %28, ptr %1, align 4, !tbaa !5
  br label %18, !llvm.loop !12

29:                                               ; preds = %18
  br label %30

30:                                               ; preds = %29, %16
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #3
  ret void
}

; 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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
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/C++ TBAA"}
!9 = !{!7, !7, i64 0}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}
!12 = distinct !{!12, !11}


; 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"

%struct._GC_arrays = type { i64, i64, i64, ptr, i64, i64, i64, i64, i64, i64, i64, i64, i64, i64, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, i32, i32, i32, i64, i64, i64, ptr, ptr, i64, i32, i64, i64, i64, %struct.dl_hashtbl_s, %struct.dl_hashtbl_s, %struct.fnlz_roots_s, i32, ptr, i64, i64, i32, i64, i64, i64, ptr, [64 x ptr], [8 x i8], [64 x ptr], [129 x ptr], [129 x ptr], [129 x ptr], [2049 x i64], [129 x ptr], [4096 x i8], [4096 x i64], [4096 x i64], ptr, [2048 x %struct.roots], [512 x %struct.exclusion], [2048 x ptr] }
%struct.dl_hashtbl_s = type { ptr, i64, i32 }
%struct.fnlz_roots_s = type { ptr, ptr }
%struct.roots = type { ptr, ptr, ptr, i32 }
%struct.exclusion = type { ptr, ptr }

@GC_arrays = external local_unnamed_addr global %struct._GC_arrays, align 8
@GC_all_interior_pointers = external local_unnamed_addr global i32, align 4

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, argmem: none, inaccessiblemem: none) uwtable
define dso_local void @GC_initialize_offsets() local_unnamed_addr #0 {
  %1 = load i32, ptr @GC_all_interior_pointers, align 4, !tbaa !5
  %.not = icmp eq i32 %1, 0
  br i1 %.not, label %.loopexit.loopexit, label %.preheader.preheader

.preheader.preheader:                             ; preds = %0
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(4096) getelementptr inbounds (i8, ptr @GC_arrays, i64 21960), i8 1, i64 4096, i1 false), !tbaa !9
  br label %.loopexit

.loopexit.loopexit:                               ; preds = %0
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(4096) getelementptr inbounds (i8, ptr @GC_arrays, i64 21960), i8 0, i64 4096, i1 false)
  store i64 0, ptr getelementptr inbounds (i8, ptr @GC_arrays, i64 920), align 8
  br label %.loopexit

.loopexit:                                        ; preds = %.preheader.preheader, %.loopexit.loopexit
  ret void
}

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

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, argmem: none, inaccessiblemem: none) 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 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!7, !7, i64 0}


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