; LLVM IR from aap/librw :: src/engine.ll (ZN2rw12free_managedEPv)

; 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.rw::MemoryBlock" = type { i64, i32, ptr, ptr, %"struct.rw::LLLink" }
%"struct.rw::LLLink" = type { ptr, ptr }

@_ZN2rw20totalMemoryAllocatedE = external dso_local global i64, align 8

; 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 nounwind uwtable
declare dso_local void @_ZN2rw6LLLink6removeEv(ptr noundef nonnull align 8 dereferenceable(16)) #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN2rw12free_managedEPv(ptr noundef %0) #2 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #4
  %5 = load ptr, ptr %2, align 8, !tbaa !5
  %6 = icmp eq ptr %5, null
  br i1 %6, label %7, label %8

7:                                                ; preds = %1
  store i32 1, ptr %4, align 4
  br label %21

8:                                                ; preds = %1
  %9 = load ptr, ptr %2, align 8, !tbaa !5
  %10 = getelementptr inbounds i8, ptr %9, i64 -48
  store ptr %10, ptr %3, align 8, !tbaa !5
  %11 = load ptr, ptr %3, align 8, !tbaa !5
  %12 = getelementptr inbounds %"struct.rw::MemoryBlock", ptr %11, i32 0, i32 4
  call void @_ZN2rw6LLLink6removeEv(ptr noundef nonnull align 8 dereferenceable(16) %12)
  %13 = load ptr, ptr %3, align 8, !tbaa !5
  %14 = getelementptr inbounds %"struct.rw::MemoryBlock", ptr %13, i32 0, i32 0
  %15 = load i64, ptr %14, align 8, !tbaa !9
  %16 = load i64, ptr @_ZN2rw20totalMemoryAllocatedE, align 8, !tbaa !14
  %17 = sub i64 %16, %15
  store i64 %17, ptr @_ZN2rw20totalMemoryAllocatedE, align 8, !tbaa !14
  %18 = load ptr, ptr %3, align 8, !tbaa !5
  %19 = getelementptr inbounds %"struct.rw::MemoryBlock", ptr %18, i32 0, i32 2
  %20 = load ptr, ptr %19, align 8, !tbaa !15
  call void @free(ptr noundef %20) #4
  store i32 0, ptr %4, align 4
  br label %21

21:                                               ; preds = %8, %7
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #4
  %22 = load i32, ptr %4, align 4
  switch i32 %22, label %24 [
    i32 0, label %23
    i32 1, label %23
  ]

23:                                               ; preds = %21, %21
  ret void

24:                                               ; preds = %21
  unreachable
}

; Function Attrs: nounwind
declare void @free(ptr noundef) #3

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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" }
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 "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 #4 = { 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, !11, i64 0}
!10 = !{!"_ZTSN2rw11MemoryBlockE", !11, i64 0, !12, i64 8, !6, i64 16, !6, i64 24, !13, i64 32}
!11 = !{!"long", !7, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = !{!"_ZTSN2rw6LLLinkE", !6, i64 0, !6, i64 8}
!14 = !{!11, !11, i64 0}
!15 = !{!10, !6, i64 16}


; 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"

@_ZN2rw20totalMemoryAllocatedE = external dso_local local_unnamed_addr global i64, align 8

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN2rw6LLLink6removeEv(ptr noundef nonnull align 8 dereferenceable(16)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN2rw12free_managedEPv(ptr noundef %0) local_unnamed_addr #0 {
  %2 = icmp eq ptr %0, null
  br i1 %2, label %11, label %3

3:                                                ; preds = %1
  %4 = getelementptr inbounds i8, ptr %0, i64 -48
  %5 = getelementptr inbounds i8, ptr %0, i64 -16
  tail call void @_ZN2rw6LLLink6removeEv(ptr noundef nonnull align 8 dereferenceable(16) %5)
  %6 = load i64, ptr %4, align 8, !tbaa !5
  %7 = load i64, ptr @_ZN2rw20totalMemoryAllocatedE, align 8, !tbaa !13
  %8 = sub i64 %7, %6
  store i64 %8, ptr @_ZN2rw20totalMemoryAllocatedE, align 8, !tbaa !13
  %9 = getelementptr inbounds i8, ptr %0, i64 -32
  %10 = load ptr, ptr %9, align 8, !tbaa !14
  tail call void @free(ptr noundef %10) #2
  br label %11

11:                                               ; preds = %1, %3
  ret void
}

; Function Attrs: mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite)
declare void @free(ptr allocptr nocapture noundef) local_unnamed_addr #1

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 nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite) "alloc-family"="malloc" "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 = { 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, !7, i64 0}
!6 = !{!"_ZTSN2rw11MemoryBlockE", !7, i64 0, !10, i64 8, !11, i64 16, !11, i64 24, !12, i64 32}
!7 = !{!"long", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!"any pointer", !8, i64 0}
!12 = !{!"_ZTSN2rw6LLLinkE", !11, i64 0, !11, i64 8}
!13 = !{!7, !7, i64 0}
!14 = !{!6, !11, i64 16}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass