Add a MathFloor stub generated with TurboFan

src/compiler/access-builder.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/access-builder.h"
 #include "src/types-inl.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
@@ skipping 132 matching lines @@
       return {kTaggedBase, SeqString::kHeaderSize, Type::Unsigned32(),
               kMachUint8};
     case String::TWO_BYTE_ENCODING:
       return {kTaggedBase, SeqString::kHeaderSize, Type::Unsigned32(),
               kMachUint16};
   }
   UNREACHABLE();
   return {kUntaggedBase, 0, Type::None(), kMachNone};
 }
 
+
+// static
+FieldAccess AccessBuilder::ForJSFunctionSharedFunctionInfo() {
+  return {kTaggedBase, JSFunction::kSharedFunctionInfoOffset, Handle<Name>(),
+          Type::Any(), kMachAnyTagged};
+}
+
+
+// static
+FieldAccess AccessBuilder::ForSharedFunctionInfoTypeFeedbackVector() {
+  return {kTaggedBase, SharedFunctionInfo::kFeedbackVectorOffset,
+          Handle<Name>(), Type::Any(), kMachAnyTagged};
+}
+
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8