; LLVM IR from mtsamis/box2d-optimized :: src/particle/b2_free_list.ll (ZN10b2FreeList9RemoveAllEv)

; 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.b2FreeList = type { %class.b2IntrusiveListNode, %class.b2IntrusiveListNode }
%class.b2IntrusiveListNode = type { ptr, ptr }

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_ZNK19b2IntrusiveListNode7IsEmptyEv(ptr noundef nonnull align 8 dereferenceable(16)) #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef ptr @_ZNK19b2IntrusiveListNode7GetNextEv(ptr noundef nonnull align 8 dereferenceable(16)) #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef ptr @_ZN19b2IntrusiveListNode6RemoveEv(ptr noundef nonnull align 8 dereferenceable(16)) #0 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN10b2FreeList9RemoveAllEv(ptr noundef nonnull align 8 dereferenceable(32) %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
  br label %4

4:                                                ; preds = %8, %1
  %5 = getelementptr inbounds %class.b2FreeList, ptr %3, i32 0, i32 0
  %6 = call noundef zeroext i1 @_ZNK19b2IntrusiveListNode7IsEmptyEv(ptr noundef nonnull align 8 dereferenceable(16) %5)
  %7 = xor i1 %6, true
  br i1 %7, label %8, label %12

8:                                                ; preds = %4
  %9 = getelementptr inbounds %class.b2FreeList, ptr %3, i32 0, i32 0
  %10 = call noundef ptr @_ZNK19b2IntrusiveListNode7GetNextEv(ptr noundef nonnull align 8 dereferenceable(16) %9)
  %11 = call noundef ptr @_ZN19b2IntrusiveListNode6RemoveEv(ptr noundef nonnull align 8 dereferenceable(16) %10)
  br label %4, !llvm.loop !9

12:                                               ; preds = %4
  br label %13

13:                                               ; preds = %17, %12
  %14 = getelementptr inbounds %class.b2FreeList, ptr %3, i32 0, i32 1
  %15 = call noundef zeroext i1 @_ZNK19b2IntrusiveListNode7IsEmptyEv(ptr noundef nonnull align 8 dereferenceable(16) %14)
  %16 = xor i1 %15, true
  br i1 %16, label %17, label %21

17:                                               ; preds = %13
  %18 = getelementptr inbounds %class.b2FreeList, ptr %3, i32 0, i32 1
  %19 = call noundef ptr @_ZNK19b2IntrusiveListNode7GetNextEv(ptr noundef nonnull align 8 dereferenceable(16) %18)
  %20 = call noundef ptr @_ZN19b2IntrusiveListNode6RemoveEv(ptr noundef nonnull align 8 dereferenceable(16) %19)
  br label %13, !llvm.loop !11

21:                                               ; preds = %13
  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" }
attributes #1 = { 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" }

!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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}


; 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"

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_ZNK19b2IntrusiveListNode7IsEmptyEv(ptr noundef nonnull align 8 dereferenceable(16)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef ptr @_ZNK19b2IntrusiveListNode7GetNextEv(ptr noundef nonnull align 8 dereferenceable(16)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef ptr @_ZN19b2IntrusiveListNode6RemoveEv(ptr noundef nonnull align 8 dereferenceable(16)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN10b2FreeList9RemoveAllEv(ptr noundef nonnull align 8 dereferenceable(32) %0) local_unnamed_addr #0 align 2 {
  %2 = tail call noundef zeroext i1 @_ZNK19b2IntrusiveListNode7IsEmptyEv(ptr noundef nonnull align 8 dereferenceable(16) %0)
  br i1 %2, label %.preheader, label %.lr.ph

.preheader:                                       ; preds = %.lr.ph, %1
  %3 = getelementptr inbounds i8, ptr %0, i64 16
  %4 = tail call noundef zeroext i1 @_ZNK19b2IntrusiveListNode7IsEmptyEv(ptr noundef nonnull align 8 dereferenceable(16) %3)
  br i1 %4, label %._crit_edge, label %.lr.ph1

.lr.ph:                                           ; preds = %1, %.lr.ph
  %5 = tail call noundef ptr @_ZNK19b2IntrusiveListNode7GetNextEv(ptr noundef nonnull align 8 dereferenceable(16) %0)
  %6 = tail call noundef ptr @_ZN19b2IntrusiveListNode6RemoveEv(ptr noundef nonnull align 8 dereferenceable(16) %5)
  %7 = tail call noundef zeroext i1 @_ZNK19b2IntrusiveListNode7IsEmptyEv(ptr noundef nonnull align 8 dereferenceable(16) %0)
  br i1 %7, label %.preheader, label %.lr.ph, !llvm.loop !5

.lr.ph1:                                          ; preds = %.preheader, %.lr.ph1
  %8 = tail call noundef ptr @_ZNK19b2IntrusiveListNode7GetNextEv(ptr noundef nonnull align 8 dereferenceable(16) %3)
  %9 = tail call noundef ptr @_ZN19b2IntrusiveListNode6RemoveEv(ptr noundef nonnull align 8 dereferenceable(16) %8)
  %10 = tail call noundef zeroext i1 @_ZNK19b2IntrusiveListNode7IsEmptyEv(ptr noundef nonnull align 8 dereferenceable(16) %3)
  br i1 %10, label %._crit_edge, label %.lr.ph1, !llvm.loop !7

._crit_edge:                                      ; preds = %.lr.ph1, %.preheader
  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" }
attributes #1 = { 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" }

!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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}
!7 = distinct !{!7, !6}


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