ART: Use proxy ArtMethod's data_ to store the interface method.

This immensely simplifies the interface method retrieval
and removes one dependency on dex_cache_resolved_methods_.
We may later consider removing that member if we deem the
memory savings worth the performance impact.

Test: m test-art-host-gtest
Test: testrunner.py --host
Test: testrunner.py --host --jit
Change-Id: Id76349c69e4c4dea4e3b297bd504db8f98f1b7cc

1 files changed, 2 insertions, 11 deletions

diff --git a/runtime/art_method-inl.h b/runtime/art_method-inl.h
index 50e91447a9..9780522328 100644
--- a/runtime/art_method-inl.h
+++ b/runtime/art_method-inl.h
@@ -388,17 +388,8 @@ inline ArtMethod* ArtMethod::GetInterfaceMethodIfProxy(PointerSize pointer_size)
   if (LIKELY(!IsProxyMethod())) {
     return this;
   }
-  uint32_t method_index = GetDexMethodIndex();
-  uint32_t slot_idx = method_index % mirror::DexCache::kDexCacheMethodCacheSize;
-  mirror::MethodDexCachePair pair = mirror::DexCache::GetNativePairPtrSize(
-      GetDexCacheResolvedMethods(pointer_size), slot_idx, pointer_size);
-  ArtMethod* interface_method = pair.GetObjectForIndex(method_index);
-  if (LIKELY(interface_method != nullptr)) {
-    DCHECK_EQ(interface_method, Runtime::Current()->GetClassLinker()->FindMethodForProxy(this));
-  } else {
-    interface_method = Runtime::Current()->GetClassLinker()->FindMethodForProxy(this);
-    DCHECK(interface_method != nullptr);
-  }
+  ArtMethod* interface_method = reinterpret_cast<ArtMethod*>(GetDataPtrSize(pointer_size));
+  DCHECK(interface_method->GetDeclaringClass()->IsAssignableFrom(GetDeclaringClass()));
   return interface_method;
 }