ART: Compiler support for const-method-type

Implemented as a runtime call.

Bug: 66890674
Test: art/test.py --target -r -t 979
Test: art/test.py --target --64 -r -t 979
Test: art/test.py --host -r -t 979
Change-Id: I4b3d3969d455d0198cfe122eea8abd54e0ea20ee
diff --git a/compiler/optimizing/graph_visualizer.cc b/compiler/optimizing/graph_visualizer.cc
index 54d4644..87ce1f0 100644
--- a/compiler/optimizing/graph_visualizer.cc
+++ b/compiler/optimizing/graph_visualizer.cc
@@ -386,6 +386,13 @@
         << load_class->NeedsAccessCheck() << std::noboolalpha;
   }
 
+  void VisitLoadMethodType(HLoadMethodType* load_method_type) OVERRIDE {
+    StartAttributeStream("load_kind") << "RuntimeCall";
+    const DexFile& dex_file = load_method_type->GetDexFile();
+    const DexFile::ProtoId& proto_id = dex_file.GetProtoId(load_method_type->GetProtoIndex());
+    StartAttributeStream("method_type") << dex_file.GetProtoSignature(proto_id);
+  }
+
   void VisitLoadString(HLoadString* load_string) OVERRIDE {
     StartAttributeStream("load_kind") << load_string->GetLoadKind();
   }