Add a MathFloor stub generated with TurboFan

src/compiler.cc

 // Copyright 2012 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.h"
 
 #include <algorithm>
 
 #include "src/ast-numbering.h"
 #include "src/bootstrapper.h"
@@ skipping 157 matching lines @@
   DCHECK(dependencies()->IsEmpty());
 #endif  // DEBUG
 }
 
 
 int CompilationInfo::num_parameters() const {
   return has_scope() ? scope()->num_parameters() : parameter_count_;
 }
 
 
+int CompilationInfo::num_parameters_including_this() const {
+  return num_parameters() + (is_this_defined() ? 1 : 0);
+}
+
+
+bool CompilationInfo::is_this_defined() const { return !IsStub(); }
+
+
 int CompilationInfo::num_heap_slots() const {
   return has_scope() ? scope()->num_heap_slots() : 0;
 }
 
 
 Code::Flags CompilationInfo::flags() const {
   return code_stub() != nullptr
              ? Code::ComputeFlags(
                    code_stub()->GetCodeKind(), code_stub()->GetICState(),
                    code_stub()->GetExtraICState(), code_stub()->GetStubType())
@@ skipping 1358 matching lines @@
 }
 
 
 #if DEBUG
 void CompilationInfo::PrintAstForTesting() {
   PrintF("--- Source from AST ---\n%s\n",
          PrettyPrinter(isolate(), zone()).PrintProgram(function()));
 }
 #endif
 } }  // namespace v8::internal