Add a MathFloor stub generated with TurboFan

src/compiler/access-builder.cc

Index: src/compiler/access-builder.cc
diff --git a/src/compiler/access-builder.cc b/src/compiler/access-builder.cc
index 0b1769bc4af0b49df4abf6ca4267f2ab532e55ab..f2446b3047e0c986520c1ceed6d4203c2340dcd1 100644
--- a/src/compiler/access-builder.cc
+++ b/src/compiler/access-builder.cc
@@ -150,6 +150,20 @@ ElementAccess AccessBuilder::ForSeqStringChar(String::Encoding encoding) {
   return {kUntaggedBase, 0, Type::None(), kMachNone};
 }
 
+
+// static
+FieldAccess AccessBuilder::ForSharedFunctionInfo() {
+  return {kTaggedBase, JSFunction::kSharedFunctionInfoOffset, Handle<Name>(),
+          Type::Any(), kMachAnyTagged};
+}
+
+
+FieldAccess AccessBuilder::ForTypeFeedbackVector() {
+  return {kTaggedBase, SharedFunctionInfo::kFeedbackVectorOffset,
+          Handle<Name>(), Type::Any(), kMachAnyTagged};
+}
+
+
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8